1 /* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
3 * Copyright (C) <2006> Nokia Corporation (contact <stefan.kost@nokia.com>)
4 * Copyright (C) <2009-2010> STEricsson <benjamin.gaignard@stericsson.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21 /* Element-Checklist-Version: 5 */
22
23 /**
24 * SECTION:element-avidemux
25 *
26 * Demuxes an .avi file into raw or compressed audio and/or video streams.
27 *
28 * This element supports both push and pull-based scheduling, depending on the
29 * capabilities of the upstream elements.
30 *
31 * <refsect2>
32 * <title>Example launch line</title>
33 * |[
34 * gst-launch-1.0 filesrc location=test.avi ! avidemux name=demux demux.audio_00 ! decodebin ! audioconvert ! audioresample ! autoaudiosink demux.video_00 ! queue ! decodebin ! videoconvert ! videoscale ! autovideosink
35 * ]| Play (parse and decode) an .avi file and try to output it to
36 * an automatically detected soundcard and videosink. If the AVI file contains
37 * compressed audio or video data, this will only work if you have the
38 * right decoder elements/plugins installed.
39 * </refsect2>
40 */
41
42 #ifdef HAVE_CONFIG_H
43 #include "config.h"
44 #endif
45
46 #include <string.h>
47 #include <stdio.h>
48
49 #include "gst/riff/riff-media.h"
50 #include "gstavidemux.h"
51 #include "avi-ids.h"
52 #include <gst/gst-i18n-plugin.h>
53 #include <gst/base/gstadapter.h>
54 #include <gst/tag/tag.h>
55
56 #define DIV_ROUND_UP(s,v) (((s) + ((v)-1)) / (v))
57
58 #define GST_AVI_KEYFRAME (1 << 0)
59 #define ENTRY_IS_KEYFRAME(e) ((e)->flags == GST_AVI_KEYFRAME)
60 #define ENTRY_SET_KEYFRAME(e) ((e)->flags = GST_AVI_KEYFRAME)
61 #define ENTRY_UNSET_KEYFRAME(e) ((e)->flags = 0)
62
63
64 GST_DEBUG_CATEGORY_STATIC (avidemux_debug);
65 #define GST_CAT_DEFAULT avidemux_debug
66
67 static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
68 GST_PAD_SINK,
69 GST_PAD_ALWAYS,
70 GST_STATIC_CAPS ("video/x-msvideo")
71 );
72
73 #ifndef GST_DISABLE_GST_DEBUG
74 static const char *const snap_types[2][2] = {
75 {"any", "after"},
76 {"before", "nearest"},
77 };
78 #endif
79
80 static void gst_avi_demux_finalize (GObject * object);
81
82 static void gst_avi_demux_reset (GstAviDemux * avi);
83
84 #if 0
85 static const GstEventMask *gst_avi_demux_get_event_mask (GstPad * pad);
86 #endif
87 static gboolean gst_avi_demux_handle_src_event (GstPad * pad,
88 GstObject * parent, GstEvent * event);
89 static gboolean gst_avi_demux_handle_sink_event (GstPad * pad,
90 GstObject * parent, GstEvent * event);
91 static gboolean gst_avi_demux_push_event (GstAviDemux * avi, GstEvent * event);
92
93 #if 0
94 static const GstFormat *gst_avi_demux_get_src_formats (GstPad * pad);
95 #endif
96 static gboolean gst_avi_demux_handle_src_query (GstPad * pad,
97 GstObject * parent, GstQuery * query);
98 static gboolean gst_avi_demux_src_convert (GstPad * pad, GstFormat src_format,
99 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
100
101 static gboolean gst_avi_demux_do_seek (GstAviDemux * avi, GstSegment * segment,
102 GstSeekFlags flags);
103 static gboolean gst_avi_demux_handle_seek (GstAviDemux * avi, GstPad * pad,
104 GstEvent * event);
105 static gboolean gst_avi_demux_handle_seek_push (GstAviDemux * avi, GstPad * pad,
106 GstEvent * event);
107 static void gst_avi_demux_loop (GstPad * pad);
108 static gboolean gst_avi_demux_sink_activate (GstPad * sinkpad,
109 GstObject * parent);
110 static gboolean gst_avi_demux_sink_activate_mode (GstPad * sinkpad,
111 GstObject * parent, GstPadMode mode, gboolean active);
112 static GstFlowReturn gst_avi_demux_chain (GstPad * pad, GstObject * parent,
113 GstBuffer * buf);
114 #if 0
115 static void gst_avi_demux_set_index (GstElement * element, GstIndex * index);
116 static GstIndex *gst_avi_demux_get_index (GstElement * element);
117 #endif
118 static GstStateChangeReturn gst_avi_demux_change_state (GstElement * element,
119 GstStateChange transition);
120 static void gst_avi_demux_calculate_durations_from_index (GstAviDemux * avi);
121 static void gst_avi_demux_get_buffer_info (GstAviDemux * avi,
122 GstAviStream * stream, guint entry_n, GstClockTime * timestamp,
123 GstClockTime * ts_end, guint64 * offset, guint64 * offset_end);
124
125 static void gst_avi_demux_parse_idit (GstAviDemux * avi, GstBuffer * buf);
126 static void gst_avi_demux_parse_strd (GstAviDemux * avi, GstBuffer * buf);
127
128 static void parse_tag_value (GstAviDemux * avi, GstTagList * taglist,
129 const gchar * type, guint8 * ptr, guint tsize);
130
131 /* GObject methods */
132
133 #define gst_avi_demux_parent_class parent_class
134 G_DEFINE_TYPE (GstAviDemux, gst_avi_demux, GST_TYPE_ELEMENT);
135
136 static void
gst_avi_demux_class_init(GstAviDemuxClass * klass)137 gst_avi_demux_class_init (GstAviDemuxClass * klass)
138 {
139 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
140 GObjectClass *gobject_class = (GObjectClass *) klass;
141 GstPadTemplate *videosrctempl, *audiosrctempl, *subsrctempl, *subpicsrctempl;
142 GstCaps *audcaps, *vidcaps, *subcaps, *subpiccaps;
143
144 GST_DEBUG_CATEGORY_INIT (avidemux_debug, "avidemux",
145 0, "Demuxer for AVI streams");
146
147 gobject_class->finalize = gst_avi_demux_finalize;
148
149 gstelement_class->change_state =
150 GST_DEBUG_FUNCPTR (gst_avi_demux_change_state);
151 #if 0
152 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_avi_demux_set_index);
153 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_avi_demux_get_index);
154 #endif
155
156 audcaps = gst_riff_create_audio_template_caps ();
157 gst_caps_append (audcaps, gst_caps_new_empty_simple ("audio/x-avi-unknown"));
158 audiosrctempl = gst_pad_template_new ("audio_%u",
159 GST_PAD_SRC, GST_PAD_SOMETIMES, audcaps);
160
161 vidcaps = gst_riff_create_video_template_caps ();
162 gst_caps_append (vidcaps, gst_riff_create_iavs_template_caps ());
163 gst_caps_append (vidcaps, gst_caps_new_empty_simple ("video/x-avi-unknown"));
164 videosrctempl = gst_pad_template_new ("video_%u",
165 GST_PAD_SRC, GST_PAD_SOMETIMES, vidcaps);
166
167 subcaps = gst_caps_new_empty_simple ("application/x-subtitle-avi");
168 subsrctempl = gst_pad_template_new ("subtitle_%u",
169 GST_PAD_SRC, GST_PAD_SOMETIMES, subcaps);
170 subpiccaps = gst_caps_new_empty_simple ("subpicture/x-xsub");
171 subpicsrctempl = gst_pad_template_new ("subpicture_%u",
172 GST_PAD_SRC, GST_PAD_SOMETIMES, subpiccaps);
173 gst_element_class_add_pad_template (gstelement_class, audiosrctempl);
174 gst_element_class_add_pad_template (gstelement_class, videosrctempl);
175 gst_element_class_add_pad_template (gstelement_class, subsrctempl);
176 gst_element_class_add_pad_template (gstelement_class, subpicsrctempl);
177 gst_element_class_add_static_pad_template (gstelement_class, &sink_templ);
178
179 gst_caps_unref (audcaps);
180 gst_caps_unref (vidcaps);
181 gst_caps_unref (subcaps);
182 gst_caps_unref (subpiccaps);
183
184 gst_element_class_set_static_metadata (gstelement_class, "Avi demuxer",
185 "Codec/Demuxer",
186 "Demultiplex an avi file into audio and video",
187 "Erik Walthinsen <omega@cse.ogi.edu>, "
188 "Wim Taymans <wim.taymans@chello.be>, "
189 "Thijs Vermeir <thijsvermeir@gmail.com>");
190 }
191
192 static void
gst_avi_demux_init(GstAviDemux * avi)193 gst_avi_demux_init (GstAviDemux * avi)
194 {
195 avi->sinkpad = gst_pad_new_from_static_template (&sink_templ, "sink");
196 gst_pad_set_activate_function (avi->sinkpad,
197 GST_DEBUG_FUNCPTR (gst_avi_demux_sink_activate));
198 gst_pad_set_activatemode_function (avi->sinkpad,
199 GST_DEBUG_FUNCPTR (gst_avi_demux_sink_activate_mode));
200 gst_pad_set_chain_function (avi->sinkpad,
201 GST_DEBUG_FUNCPTR (gst_avi_demux_chain));
202 gst_pad_set_event_function (avi->sinkpad,
203 GST_DEBUG_FUNCPTR (gst_avi_demux_handle_sink_event));
204 gst_element_add_pad (GST_ELEMENT_CAST (avi), avi->sinkpad);
205
206 avi->adapter = gst_adapter_new ();
207 avi->flowcombiner = gst_flow_combiner_new ();
208
209 gst_avi_demux_reset (avi);
210
211 GST_OBJECT_FLAG_SET (avi, GST_ELEMENT_FLAG_INDEXABLE);
212 }
213
214 static void
gst_avi_demux_finalize(GObject * object)215 gst_avi_demux_finalize (GObject * object)
216 {
217 GstAviDemux *avi = GST_AVI_DEMUX (object);
218
219 GST_DEBUG ("AVI: finalize");
220
221 g_object_unref (avi->adapter);
222 gst_flow_combiner_free (avi->flowcombiner);
223
224 G_OBJECT_CLASS (parent_class)->finalize (object);
225 }
226
227 static void
gst_avi_demux_reset_stream(GstAviDemux * avi,GstAviStream * stream)228 gst_avi_demux_reset_stream (GstAviDemux * avi, GstAviStream * stream)
229 {
230 g_free (stream->strh);
231 g_free (stream->strf.data);
232 g_free (stream->name);
233 g_free (stream->index);
234 g_free (stream->indexes);
235 if (stream->initdata)
236 gst_buffer_unref (stream->initdata);
237 if (stream->extradata)
238 gst_buffer_unref (stream->extradata);
239 if (stream->rgb8_palette)
240 gst_buffer_unref (stream->rgb8_palette);
241 if (stream->pad) {
242 if (stream->exposed) {
243 gst_pad_set_active (stream->pad, FALSE);
244 gst_element_remove_pad (GST_ELEMENT_CAST (avi), stream->pad);
245 gst_flow_combiner_remove_pad (avi->flowcombiner, stream->pad);
246 } else
247 gst_object_unref (stream->pad);
248 }
249 if (stream->taglist) {
250 gst_tag_list_unref (stream->taglist);
251 stream->taglist = NULL;
252 }
253 memset (stream, 0, sizeof (GstAviStream));
254 }
255
256 static void
gst_avi_demux_reset(GstAviDemux * avi)257 gst_avi_demux_reset (GstAviDemux * avi)
258 {
259 gint i;
260
261 GST_DEBUG ("AVI: reset");
262
263 for (i = 0; i < avi->num_streams; i++)
264 gst_avi_demux_reset_stream (avi, &avi->stream[i]);
265
266 avi->header_state = GST_AVI_DEMUX_HEADER_TAG_LIST;
267 avi->num_streams = 0;
268 avi->num_v_streams = 0;
269 avi->num_a_streams = 0;
270 avi->num_t_streams = 0;
271 avi->num_sp_streams = 0;
272 avi->main_stream = -1;
273
274 avi->have_group_id = FALSE;
275 avi->group_id = G_MAXUINT;
276
277 avi->state = GST_AVI_DEMUX_START;
278 avi->offset = 0;
279 avi->building_index = FALSE;
280
281 avi->index_offset = 0;
282 g_free (avi->avih);
283 avi->avih = NULL;
284
285 #if 0
286 if (avi->element_index)
287 gst_object_unref (avi->element_index);
288 avi->element_index = NULL;
289 #endif
290
291 if (avi->seg_event) {
292 gst_event_unref (avi->seg_event);
293 avi->seg_event = NULL;
294 }
295 if (avi->seek_event) {
296 gst_event_unref (avi->seek_event);
297 avi->seek_event = NULL;
298 }
299
300 if (avi->globaltags)
301 gst_tag_list_unref (avi->globaltags);
302 avi->globaltags = NULL;
303
304 avi->got_tags = TRUE; /* we always want to push global tags */
305 avi->have_eos = FALSE;
306 avi->seekable = TRUE;
307
308 gst_adapter_clear (avi->adapter);
309
310 gst_segment_init (&avi->segment, GST_FORMAT_TIME);
311 avi->segment_seqnum = 0;
312 }
313
314
315 /* GstElement methods */
316
317 #if 0
318 static const GstFormat *
319 gst_avi_demux_get_src_formats (GstPad * pad)
320 {
321 GstAviStream *stream = gst_pad_get_element_private (pad);
322
323 static const GstFormat src_a_formats[] = {
324 GST_FORMAT_TIME,
325 GST_FORMAT_BYTES,
326 GST_FORMAT_DEFAULT,
327 0
328 };
329 static const GstFormat src_v_formats[] = {
330 GST_FORMAT_TIME,
331 GST_FORMAT_DEFAULT,
332 0
333 };
334
335 return (stream->strh->type == GST_RIFF_FCC_auds ?
336 src_a_formats : src_v_formats);
337 }
338 #endif
339
340 /* assumes stream->strf.auds->av_bps != 0 */
341 static inline GstClockTime
avi_stream_convert_bytes_to_time_unchecked(GstAviStream * stream,guint64 bytes)342 avi_stream_convert_bytes_to_time_unchecked (GstAviStream * stream,
343 guint64 bytes)
344 {
345 return gst_util_uint64_scale_int (bytes, GST_SECOND,
346 stream->strf.auds->av_bps);
347 }
348
349 static inline guint64
avi_stream_convert_time_to_bytes_unchecked(GstAviStream * stream,GstClockTime time)350 avi_stream_convert_time_to_bytes_unchecked (GstAviStream * stream,
351 GstClockTime time)
352 {
353 return gst_util_uint64_scale_int (time, stream->strf.auds->av_bps,
354 GST_SECOND);
355 }
356
357 /* assumes stream->strh->rate != 0 */
358 static inline GstClockTime
avi_stream_convert_frames_to_time_unchecked(GstAviStream * stream,guint64 frames)359 avi_stream_convert_frames_to_time_unchecked (GstAviStream * stream,
360 guint64 frames)
361 {
362 return gst_util_uint64_scale (frames, stream->strh->scale * GST_SECOND,
363 stream->strh->rate);
364 }
365
366 static inline guint64
avi_stream_convert_time_to_frames_unchecked(GstAviStream * stream,GstClockTime time)367 avi_stream_convert_time_to_frames_unchecked (GstAviStream * stream,
368 GstClockTime time)
369 {
370 return gst_util_uint64_scale (time, stream->strh->rate,
371 stream->strh->scale * GST_SECOND);
372 }
373
374 static gboolean
gst_avi_demux_src_convert(GstPad * pad,GstFormat src_format,gint64 src_value,GstFormat * dest_format,gint64 * dest_value)375 gst_avi_demux_src_convert (GstPad * pad,
376 GstFormat src_format,
377 gint64 src_value, GstFormat * dest_format, gint64 * dest_value)
378 {
379 GstAviStream *stream = gst_pad_get_element_private (pad);
380 gboolean res = TRUE;
381
382 GST_LOG_OBJECT (pad,
383 "Received src_format:%s, src_value:%" G_GUINT64_FORMAT
384 ", dest_format:%s", gst_format_get_name (src_format), src_value,
385 gst_format_get_name (*dest_format));
386
387 if (G_UNLIKELY (src_format == *dest_format)) {
388 *dest_value = src_value;
389 goto done;
390 }
391 if (G_UNLIKELY (!stream->strh || !stream->strf.data)) {
392 res = FALSE;
393 goto done;
394 }
395 if (G_UNLIKELY (stream->strh->type == GST_RIFF_FCC_vids &&
396 (src_format == GST_FORMAT_BYTES
397 || *dest_format == GST_FORMAT_BYTES))) {
398 res = FALSE;
399 goto done;
400 }
401
402 switch (src_format) {
403 case GST_FORMAT_TIME:
404 switch (*dest_format) {
405 case GST_FORMAT_BYTES:
406 *dest_value = gst_util_uint64_scale_int (src_value,
407 stream->strf.auds->av_bps, GST_SECOND);
408 break;
409 case GST_FORMAT_DEFAULT:
410 *dest_value =
411 gst_util_uint64_scale_round (src_value, stream->strh->rate,
412 stream->strh->scale * GST_SECOND);
413 break;
414 default:
415 res = FALSE;
416 break;
417 }
418 break;
419 case GST_FORMAT_BYTES:
420 switch (*dest_format) {
421 case GST_FORMAT_TIME:
422 if (stream->strf.auds->av_bps != 0) {
423 *dest_value = avi_stream_convert_bytes_to_time_unchecked (stream,
424 src_value);
425 } else
426 res = FALSE;
427 break;
428 default:
429 res = FALSE;
430 break;
431 }
432 break;
433 case GST_FORMAT_DEFAULT:
434 switch (*dest_format) {
435 case GST_FORMAT_TIME:
436 *dest_value =
437 avi_stream_convert_frames_to_time_unchecked (stream, src_value);
438 break;
439 default:
440 res = FALSE;
441 break;
442 }
443 break;
444 default:
445 res = FALSE;
446 }
447
448 done:
449 GST_LOG_OBJECT (pad,
450 "Returning res:%d dest_format:%s dest_value:%" G_GUINT64_FORMAT, res,
451 gst_format_get_name (*dest_format), *dest_value);
452 return res;
453 }
454
455 static gboolean
gst_avi_demux_handle_src_query(GstPad * pad,GstObject * parent,GstQuery * query)456 gst_avi_demux_handle_src_query (GstPad * pad, GstObject * parent,
457 GstQuery * query)
458 {
459 gboolean res = TRUE;
460 GstAviDemux *avi = GST_AVI_DEMUX (parent);
461
462 GstAviStream *stream = gst_pad_get_element_private (pad);
463
464 if (!stream->strh || !stream->strf.data)
465 return gst_pad_query_default (pad, parent, query);
466
467 switch (GST_QUERY_TYPE (query)) {
468 case GST_QUERY_POSITION:{
469 gint64 pos = 0;
470
471 GST_DEBUG ("pos query for stream %u: frames %u, bytes %u",
472 stream->num, stream->current_entry, stream->current_total);
473
474 /* FIXME, this looks clumsy */
475 if (stream->strh->type == GST_RIFF_FCC_auds) {
476 if (stream->is_vbr) {
477 /* VBR */
478 pos = avi_stream_convert_frames_to_time_unchecked (stream,
479 stream->current_entry);
480 GST_DEBUG_OBJECT (avi, "VBR convert frame %u, time %"
481 GST_TIME_FORMAT, stream->current_entry, GST_TIME_ARGS (pos));
482 } else if (stream->strf.auds->av_bps != 0) {
483 /* CBR */
484 pos = avi_stream_convert_bytes_to_time_unchecked (stream,
485 stream->current_total);
486 GST_DEBUG_OBJECT (avi,
487 "CBR convert bytes %u, time %" GST_TIME_FORMAT,
488 stream->current_total, GST_TIME_ARGS (pos));
489 } else if (stream->idx_n != 0 && stream->total_bytes != 0) {
490 /* calculate timestamps based on percentage of length */
491 guint64 xlen = avi->avih->us_frame *
492 avi->avih->tot_frames * GST_USECOND;
493
494 pos = gst_util_uint64_scale (xlen, stream->current_total,
495 stream->total_bytes);
496 GST_DEBUG_OBJECT (avi,
497 "CBR perc convert bytes %u, time %" GST_TIME_FORMAT,
498 stream->current_total, GST_TIME_ARGS (pos));
499 } else {
500 /* we don't know */
501 res = FALSE;
502 }
503 } else {
504 if (stream->strh->rate != 0) {
505 pos = gst_util_uint64_scale ((guint64) stream->current_entry *
506 stream->strh->scale, GST_SECOND, (guint64) stream->strh->rate);
507 } else {
508 pos = stream->current_entry * avi->avih->us_frame * GST_USECOND;
509 }
510 }
511 if (res) {
512 GST_DEBUG ("pos query : %" GST_TIME_FORMAT, GST_TIME_ARGS (pos));
513 gst_query_set_position (query, GST_FORMAT_TIME, pos);
514 } else
515 GST_WARNING ("pos query failed");
516 break;
517 }
518 case GST_QUERY_DURATION:
519 {
520 GstFormat fmt;
521 GstClockTime duration;
522
523 /* only act on audio or video streams */
524 if (stream->strh->type != GST_RIFF_FCC_auds &&
525 stream->strh->type != GST_RIFF_FCC_vids &&
526 stream->strh->type != GST_RIFF_FCC_iavs) {
527 res = FALSE;
528 break;
529 }
530
531 /* take stream duration, fall back to avih duration */
532 if ((duration = stream->duration) == -1)
533 if ((duration = stream->hdr_duration) == -1)
534 duration = avi->duration;
535
536 gst_query_parse_duration (query, &fmt, NULL);
537
538 switch (fmt) {
539 case GST_FORMAT_TIME:
540 gst_query_set_duration (query, fmt, duration);
541 break;
542 case GST_FORMAT_DEFAULT:
543 {
544 gint64 dur;
545 GST_DEBUG_OBJECT (query, "total frames is %" G_GUINT32_FORMAT,
546 stream->idx_n);
547
548 if (stream->idx_n > 0)
549 gst_query_set_duration (query, fmt, stream->idx_n);
550 else if (gst_pad_query_convert (pad, GST_FORMAT_TIME,
551 duration, fmt, &dur))
552 gst_query_set_duration (query, fmt, dur);
553 break;
554 }
555 default:
556 res = FALSE;
557 break;
558 }
559 break;
560 }
561 case GST_QUERY_SEEKING:{
562 GstFormat fmt;
563
564 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
565 if (fmt == GST_FORMAT_TIME) {
566 gboolean seekable = TRUE;
567
568 if (avi->streaming) {
569 seekable = avi->seekable;
570 }
571
572 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable,
573 0, stream->duration);
574 res = TRUE;
575 }
576 break;
577 }
578 case GST_QUERY_CONVERT:{
579 GstFormat src_fmt, dest_fmt;
580 gint64 src_val, dest_val;
581
582 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
583 if ((res = gst_avi_demux_src_convert (pad, src_fmt, src_val, &dest_fmt,
584 &dest_val)))
585 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
586 else
587 res = gst_pad_query_default (pad, parent, query);
588 break;
589 }
590 case GST_QUERY_SEGMENT:
591 {
592 GstFormat format;
593 gint64 start, stop;
594
595 format = avi->segment.format;
596
597 start =
598 gst_segment_to_stream_time (&avi->segment, format,
599 avi->segment.start);
600 if ((stop = avi->segment.stop) == -1)
601 stop = avi->segment.duration;
602 else
603 stop = gst_segment_to_stream_time (&avi->segment, format, stop);
604
605 gst_query_set_segment (query, avi->segment.rate, format, start, stop);
606 res = TRUE;
607 break;
608 }
609 default:
610 res = gst_pad_query_default (pad, parent, query);
611 break;
612 }
613
614 return res;
615 }
616
617 #if 0
618 static const GstEventMask *
619 gst_avi_demux_get_event_mask (GstPad * pad)
620 {
621 static const GstEventMask masks[] = {
622 {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_KEY_UNIT},
623 {0,}
624 };
625
626 return masks;
627 }
628 #endif
629
630 #if 0
631 static guint64
632 gst_avi_demux_seek_streams (GstAviDemux * avi, guint64 offset, gboolean before)
633 {
634 GstAviStream *stream;
635 GstIndexEntry *entry;
636 gint i;
637 gint64 val, min = offset;
638
639 for (i = 0; i < avi->num_streams; i++) {
640 stream = &avi->stream[i];
641
642 entry = gst_index_get_assoc_entry (avi->element_index, stream->index_id,
643 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
644 GST_ASSOCIATION_FLAG_NONE, GST_FORMAT_BYTES, offset);
645
646 if (before) {
647 if (entry) {
648 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &val);
649 GST_DEBUG_OBJECT (avi, "stream %d, previous entry at %"
650 G_GUINT64_FORMAT, i, val);
651 if (val < min)
652 min = val;
653 }
654 continue;
655 }
656
657 if (!entry) {
658 GST_DEBUG_OBJECT (avi, "no position for stream %d, assuming at start", i);
659 stream->current_entry = 0;
660 stream->current_total = 0;
661 continue;
662 }
663
664 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &val);
665 GST_DEBUG_OBJECT (avi, "stream %d, next entry at %" G_GUINT64_FORMAT,
666 i, val);
667
668 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &val);
669 stream->current_total = val;
670 gst_index_entry_assoc_map (entry, GST_FORMAT_DEFAULT, &val);
671 stream->current_entry = val;
672 }
673
674 return min;
675 }
676 #endif
677
678 static gint
gst_avi_demux_index_entry_offset_search(GstAviIndexEntry * entry,guint64 * offset)679 gst_avi_demux_index_entry_offset_search (GstAviIndexEntry * entry,
680 guint64 * offset)
681 {
682 if (entry->offset < *offset)
683 return -1;
684 else if (entry->offset > *offset)
685 return 1;
686 return 0;
687 }
688
689 static guint64
gst_avi_demux_seek_streams_index(GstAviDemux * avi,guint64 offset,gboolean before)690 gst_avi_demux_seek_streams_index (GstAviDemux * avi, guint64 offset,
691 gboolean before)
692 {
693 GstAviStream *stream;
694 GstAviIndexEntry *entry;
695 gint i;
696 gint64 val, min = offset;
697 guint index = 0;
698
699 for (i = 0; i < avi->num_streams; i++) {
700 stream = &avi->stream[i];
701
702 /* compensate for chunk header */
703 offset += 8;
704 entry =
705 gst_util_array_binary_search (stream->index, stream->idx_n,
706 sizeof (GstAviIndexEntry),
707 (GCompareDataFunc) gst_avi_demux_index_entry_offset_search,
708 before ? GST_SEARCH_MODE_BEFORE : GST_SEARCH_MODE_AFTER, &offset, NULL);
709 offset -= 8;
710
711 if (entry)
712 index = entry - stream->index;
713
714 if (before) {
715 if (entry) {
716 val = stream->index[index].offset;
717 GST_DEBUG_OBJECT (avi,
718 "stream %d, previous entry at %" G_GUINT64_FORMAT, i, val);
719 if (val < min)
720 min = val;
721 }
722 continue;
723 }
724
725 if (!entry) {
726 GST_DEBUG_OBJECT (avi, "no position for stream %d, assuming at start", i);
727 stream->current_entry = 0;
728 stream->current_total = 0;
729 continue;
730 }
731
732 val = stream->index[index].offset - 8;
733 GST_DEBUG_OBJECT (avi, "stream %d, next entry at %" G_GUINT64_FORMAT, i,
734 val);
735
736 stream->current_total = stream->index[index].total;
737 stream->current_entry = index;
738 }
739
740 return min;
741 }
742
743 #define GST_AVI_SEEK_PUSH_DISPLACE (4 * GST_SECOND)
744
745 static gboolean
gst_avi_demux_handle_sink_event(GstPad * pad,GstObject * parent,GstEvent * event)746 gst_avi_demux_handle_sink_event (GstPad * pad, GstObject * parent,
747 GstEvent * event)
748 {
749 gboolean res = TRUE;
750 GstAviDemux *avi = GST_AVI_DEMUX (parent);
751
752 GST_DEBUG_OBJECT (avi,
753 "have event type %s: %p on sink pad", GST_EVENT_TYPE_NAME (event), event);
754
755 switch (GST_EVENT_TYPE (event)) {
756 case GST_EVENT_SEGMENT:
757 {
758 gint64 boffset, offset = 0;
759 GstSegment segment;
760 GstEvent *segment_event;
761
762 /* some debug output */
763 gst_event_copy_segment (event, &segment);
764 GST_DEBUG_OBJECT (avi, "received newsegment %" GST_SEGMENT_FORMAT,
765 &segment);
766
767 /* chain will send initial newsegment after pads have been added */
768 if (avi->state != GST_AVI_DEMUX_MOVI) {
769 GST_DEBUG_OBJECT (avi, "still starting, eating event");
770 goto exit;
771 }
772
773 /* we only expect a BYTE segment, e.g. following a seek */
774 if (segment.format != GST_FORMAT_BYTES) {
775 GST_DEBUG_OBJECT (avi, "unsupported segment format, ignoring");
776 goto exit;
777 }
778
779 if (avi->have_index) {
780 GstAviIndexEntry *entry;
781 guint i = 0, index = 0, k = 0;
782 GstAviStream *stream;
783
784 /* compensate chunk header, stored index offset points after header */
785 boffset = segment.start + 8;
786 /* find which stream we're on */
787 do {
788 stream = &avi->stream[i];
789
790 /* find the index for start bytes offset */
791 entry = gst_util_array_binary_search (stream->index,
792 stream->idx_n, sizeof (GstAviIndexEntry),
793 (GCompareDataFunc) gst_avi_demux_index_entry_offset_search,
794 GST_SEARCH_MODE_AFTER, &boffset, NULL);
795
796 if (entry == NULL)
797 continue;
798 index = entry - stream->index;
799
800 /* we are on the stream with a chunk start offset closest to start */
801 if (!offset || stream->index[index].offset < offset) {
802 offset = stream->index[index].offset;
803 k = i;
804 }
805 /* exact match needs no further searching */
806 if (stream->index[index].offset == boffset)
807 break;
808 } while (++i < avi->num_streams);
809 boffset -= 8;
810 offset -= 8;
811 stream = &avi->stream[k];
812
813 /* so we have no idea what is to come, or where we are */
814 if (!offset) {
815 GST_WARNING_OBJECT (avi, "insufficient index data, forcing EOS");
816 goto eos;
817 }
818
819 /* get the ts corresponding to start offset bytes for the stream */
820 gst_avi_demux_get_buffer_info (avi, stream, index,
821 (GstClockTime *) & segment.time, NULL, NULL, NULL);
822 #if 0
823 } else if (avi->element_index) {
824 GstIndexEntry *entry;
825
826 /* Let's check if we have an index entry for this position */
827 entry = gst_index_get_assoc_entry (avi->element_index, avi->index_id,
828 GST_INDEX_LOOKUP_AFTER, GST_ASSOCIATION_FLAG_NONE,
829 GST_FORMAT_BYTES, segment.start);
830
831 /* we can not go where we have not yet been before ... */
832 if (!entry) {
833 GST_WARNING_OBJECT (avi, "insufficient index data, forcing EOS");
834 goto eos;
835 }
836
837 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME,
838 (gint64 *) & segment.time);
839 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &offset);
840 #endif
841 } else {
842 GST_WARNING_OBJECT (avi, "no index data, forcing EOS");
843 goto eos;
844 }
845
846 segment.format = GST_FORMAT_TIME;
847 segment.start = segment.time;
848 segment.stop = GST_CLOCK_TIME_NONE;
849 segment.position = segment.start;
850
851 /* rescue duration */
852 segment.duration = avi->segment.duration;
853
854 /* set up segment and send downstream */
855 gst_segment_copy_into (&segment, &avi->segment);
856
857 GST_DEBUG_OBJECT (avi, "Pushing newseg %" GST_SEGMENT_FORMAT, &segment);
858 avi->segment_seqnum = gst_event_get_seqnum (event);
859 segment_event = gst_event_new_segment (&segment);
860 gst_event_set_seqnum (segment_event, gst_event_get_seqnum (event));
861 gst_avi_demux_push_event (avi, segment_event);
862
863 GST_DEBUG_OBJECT (avi, "next chunk expected at %" G_GINT64_FORMAT,
864 boffset);
865
866 /* adjust state for streaming thread accordingly */
867 if (avi->have_index)
868 gst_avi_demux_seek_streams_index (avi, offset, FALSE);
869 #if 0
870 else
871 gst_avi_demux_seek_streams (avi, offset, FALSE);
872 #endif
873
874 /* set up streaming thread */
875 g_assert (offset >= boffset);
876 avi->offset = boffset;
877 avi->todrop = offset - boffset;
878
879 exit:
880 gst_event_unref (event);
881 res = TRUE;
882 break;
883 eos:
884 /* set up for EOS */
885 avi->have_eos = TRUE;
886 goto exit;
887 }
888 case GST_EVENT_EOS:
889 {
890 if (avi->state != GST_AVI_DEMUX_MOVI) {
891 gst_event_unref (event);
892 GST_ELEMENT_ERROR (avi, STREAM, DEMUX,
893 (NULL), ("got eos and didn't receive a complete header object"));
894 } else if (!gst_avi_demux_push_event (avi, event)) {
895 GST_ELEMENT_ERROR (avi, STREAM, DEMUX,
896 (NULL), ("got eos but no streams (yet)"));
897 }
898 break;
899 }
900 case GST_EVENT_FLUSH_STOP:
901 {
902 gint i;
903
904 gst_adapter_clear (avi->adapter);
905 avi->have_eos = FALSE;
906 for (i = 0; i < avi->num_streams; i++) {
907 avi->stream[i].discont = TRUE;
908 }
909 /* fall through to default case so that the event gets passed downstream */
910 }
911 default:
912 res = gst_pad_event_default (pad, parent, event);
913 break;
914 }
915
916 return res;
917 }
918
919 static gboolean
gst_avi_demux_handle_src_event(GstPad * pad,GstObject * parent,GstEvent * event)920 gst_avi_demux_handle_src_event (GstPad * pad, GstObject * parent,
921 GstEvent * event)
922 {
923 gboolean res = TRUE;
924 GstAviDemux *avi = GST_AVI_DEMUX (parent);
925
926 GST_DEBUG_OBJECT (avi,
927 "have event type %s: %p on src pad", GST_EVENT_TYPE_NAME (event), event);
928
929 switch (GST_EVENT_TYPE (event)) {
930 case GST_EVENT_SEEK:
931 if (!avi->streaming) {
932 res = gst_avi_demux_handle_seek (avi, pad, event);
933 } else {
934 res = gst_avi_demux_handle_seek_push (avi, pad, event);
935 }
936 gst_event_unref (event);
937 break;
938 default:
939 res = gst_pad_event_default (pad, parent, event);
940 break;
941 }
942
943 return res;
944 }
945
946 /* streaming helper (push) */
947
948 /*
949 * gst_avi_demux_peek_chunk_info:
950 * @avi: Avi object
951 * @tag: holder for tag
952 * @size: holder for tag size
953 *
954 * Peek next chunk info (tag and size)
955 *
956 * Returns: TRUE when one chunk info has been got
957 */
958 static gboolean
gst_avi_demux_peek_chunk_info(GstAviDemux * avi,guint32 * tag,guint32 * size)959 gst_avi_demux_peek_chunk_info (GstAviDemux * avi, guint32 * tag, guint32 * size)
960 {
961 const guint8 *data = NULL;
962
963 if (gst_adapter_available (avi->adapter) < 8)
964 return FALSE;
965
966 data = gst_adapter_map (avi->adapter, 8);
967 *tag = GST_READ_UINT32_LE (data);
968 *size = GST_READ_UINT32_LE (data + 4);
969 gst_adapter_unmap (avi->adapter);
970
971 return TRUE;
972 }
973
974 /*
975 * gst_avi_demux_peek_chunk:
976 * @avi: Avi object
977 * @tag: holder for tag
978 * @size: holder for tag size
979 *
980 * Peek enough data for one full chunk
981 *
982 * Returns: %TRUE when one chunk has been got
983 */
984 static gboolean
gst_avi_demux_peek_chunk(GstAviDemux * avi,guint32 * tag,guint32 * size)985 gst_avi_demux_peek_chunk (GstAviDemux * avi, guint32 * tag, guint32 * size)
986 {
987 guint32 peek_size = 0;
988 gint available;
989
990 if (!gst_avi_demux_peek_chunk_info (avi, tag, size))
991 goto peek_failed;
992
993 /* size 0 -> empty data buffer would surprise most callers,
994 * large size -> do not bother trying to squeeze that into adapter,
995 * so we throw poor man's exception, which can be caught if caller really
996 * wants to handle 0 size chunk */
997 if (!(*size) || (*size) >= (1 << 30))
998 goto strange_size;
999
1000 peek_size = (*size + 1) & ~1;
1001 available = gst_adapter_available (avi->adapter);
1002
1003 GST_DEBUG_OBJECT (avi,
1004 "Need to peek chunk of %d bytes to read chunk %" GST_FOURCC_FORMAT
1005 ", %d bytes available", *size, GST_FOURCC_ARGS (*tag), available);
1006
1007 if (available < (8 + peek_size))
1008 goto need_more;
1009
1010 return TRUE;
1011
1012 /* ERRORS */
1013 peek_failed:
1014 {
1015 GST_INFO_OBJECT (avi, "Failed to peek");
1016 return FALSE;
1017 }
1018 strange_size:
1019 {
1020 GST_INFO_OBJECT (avi,
1021 "Invalid/unexpected chunk size %d for tag %" GST_FOURCC_FORMAT, *size,
1022 GST_FOURCC_ARGS (*tag));
1023 /* chain should give up */
1024 avi->abort_buffering = TRUE;
1025 return FALSE;
1026 }
1027 need_more:
1028 {
1029 GST_INFO_OBJECT (avi, "need more %d < %" G_GUINT32_FORMAT,
1030 available, 8 + peek_size);
1031 return FALSE;
1032 }
1033 }
1034
1035 /* AVI init */
1036
1037 /*
1038 * gst_avi_demux_parse_file_header:
1039 * @element: caller element (used for errors/debug).
1040 * @buf: input data to be used for parsing.
1041 *
1042 * "Open" a RIFF/AVI file. The buffer should be at least 12
1043 * bytes long. Takes ownership of @buf.
1044 *
1045 * Returns: TRUE if the file is a RIFF/AVI file, FALSE otherwise.
1046 * Throws an error, caller should error out (fatal).
1047 */
1048 static gboolean
gst_avi_demux_parse_file_header(GstElement * element,GstBuffer * buf)1049 gst_avi_demux_parse_file_header (GstElement * element, GstBuffer * buf)
1050 {
1051 guint32 doctype;
1052 GstClockTime stamp;
1053
1054 stamp = gst_util_get_timestamp ();
1055
1056 /* riff_parse posts an error */
1057 if (!gst_riff_parse_file_header (element, buf, &doctype))
1058 return FALSE;
1059
1060 if (doctype != GST_RIFF_RIFF_AVI)
1061 goto not_avi;
1062
1063 stamp = gst_util_get_timestamp () - stamp;
1064 GST_DEBUG_OBJECT (element, "header parsing took %" GST_TIME_FORMAT,
1065 GST_TIME_ARGS (stamp));
1066
1067 return TRUE;
1068
1069 /* ERRORS */
1070 not_avi:
1071 {
1072 GST_ELEMENT_ERROR (element, STREAM, WRONG_TYPE, (NULL),
1073 ("File is not an AVI file: 0x%" G_GINT32_MODIFIER "x", doctype));
1074 return FALSE;
1075 }
1076 }
1077
1078 /*
1079 * Read AVI file tag when streaming
1080 */
1081 static GstFlowReturn
gst_avi_demux_stream_init_push(GstAviDemux * avi)1082 gst_avi_demux_stream_init_push (GstAviDemux * avi)
1083 {
1084 if (gst_adapter_available (avi->adapter) >= 12) {
1085 GstBuffer *tmp;
1086
1087 tmp = gst_adapter_take_buffer (avi->adapter, 12);
1088
1089 GST_DEBUG ("Parsing avi header");
1090 if (!gst_avi_demux_parse_file_header (GST_ELEMENT_CAST (avi), tmp)) {
1091 return GST_FLOW_ERROR;
1092 }
1093 GST_DEBUG ("header ok");
1094 avi->offset += 12;
1095
1096 avi->state = GST_AVI_DEMUX_HEADER;
1097 }
1098 return GST_FLOW_OK;
1099 }
1100
1101 /*
1102 * Read AVI file tag
1103 */
1104 static GstFlowReturn
gst_avi_demux_stream_init_pull(GstAviDemux * avi)1105 gst_avi_demux_stream_init_pull (GstAviDemux * avi)
1106 {
1107 GstFlowReturn res;
1108 GstBuffer *buf = NULL;
1109
1110 res = gst_pad_pull_range (avi->sinkpad, avi->offset, 12, &buf);
1111 if (res != GST_FLOW_OK)
1112 return res;
1113 else if (!gst_avi_demux_parse_file_header (GST_ELEMENT_CAST (avi), buf))
1114 goto wrong_header;
1115
1116 avi->offset += 12;
1117
1118 return GST_FLOW_OK;
1119
1120 /* ERRORS */
1121 wrong_header:
1122 {
1123 GST_DEBUG_OBJECT (avi, "error parsing file header");
1124 return GST_FLOW_ERROR;
1125 }
1126 }
1127
1128 /* AVI header handling */
1129 /*
1130 * gst_avi_demux_parse_avih:
1131 * @avi: caller element (used for errors/debug).
1132 * @buf: input data to be used for parsing.
1133 * @avih: pointer to structure (filled in by function) containing
1134 * stream information (such as flags, number of streams, etc.).
1135 *
1136 * Read 'avih' header. Discards buffer after use.
1137 *
1138 * Returns: TRUE on success, FALSE otherwise. Throws an error if
1139 * the header is invalid. The caller should error out
1140 * (fatal).
1141 */
1142 static gboolean
gst_avi_demux_parse_avih(GstAviDemux * avi,GstBuffer * buf,gst_riff_avih ** _avih)1143 gst_avi_demux_parse_avih (GstAviDemux * avi,
1144 GstBuffer * buf, gst_riff_avih ** _avih)
1145 {
1146 gst_riff_avih *avih;
1147 gsize size;
1148
1149 if (buf == NULL)
1150 goto no_buffer;
1151
1152 size = gst_buffer_get_size (buf);
1153 if (size < sizeof (gst_riff_avih))
1154 goto avih_too_small;
1155
1156 avih = g_malloc (size);
1157 gst_buffer_extract (buf, 0, avih, size);
1158
1159 #if (G_BYTE_ORDER == G_BIG_ENDIAN)
1160 avih->us_frame = GUINT32_FROM_LE (avih->us_frame);
1161 avih->max_bps = GUINT32_FROM_LE (avih->max_bps);
1162 avih->pad_gran = GUINT32_FROM_LE (avih->pad_gran);
1163 avih->flags = GUINT32_FROM_LE (avih->flags);
1164 avih->tot_frames = GUINT32_FROM_LE (avih->tot_frames);
1165 avih->init_frames = GUINT32_FROM_LE (avih->init_frames);
1166 avih->streams = GUINT32_FROM_LE (avih->streams);
1167 avih->bufsize = GUINT32_FROM_LE (avih->bufsize);
1168 avih->width = GUINT32_FROM_LE (avih->width);
1169 avih->height = GUINT32_FROM_LE (avih->height);
1170 avih->scale = GUINT32_FROM_LE (avih->scale);
1171 avih->rate = GUINT32_FROM_LE (avih->rate);
1172 avih->start = GUINT32_FROM_LE (avih->start);
1173 avih->length = GUINT32_FROM_LE (avih->length);
1174 #endif
1175
1176 /* debug stuff */
1177 GST_INFO_OBJECT (avi, "avih tag found:");
1178 GST_INFO_OBJECT (avi, " us_frame %u", avih->us_frame);
1179 GST_INFO_OBJECT (avi, " max_bps %u", avih->max_bps);
1180 GST_INFO_OBJECT (avi, " pad_gran %u", avih->pad_gran);
1181 GST_INFO_OBJECT (avi, " flags 0x%08x", avih->flags);
1182 GST_INFO_OBJECT (avi, " tot_frames %u", avih->tot_frames);
1183 GST_INFO_OBJECT (avi, " init_frames %u", avih->init_frames);
1184 GST_INFO_OBJECT (avi, " streams %u", avih->streams);
1185 GST_INFO_OBJECT (avi, " bufsize %u", avih->bufsize);
1186 GST_INFO_OBJECT (avi, " width %u", avih->width);
1187 GST_INFO_OBJECT (avi, " height %u", avih->height);
1188 GST_INFO_OBJECT (avi, " scale %u", avih->scale);
1189 GST_INFO_OBJECT (avi, " rate %u", avih->rate);
1190 GST_INFO_OBJECT (avi, " start %u", avih->start);
1191 GST_INFO_OBJECT (avi, " length %u", avih->length);
1192
1193 *_avih = avih;
1194 gst_buffer_unref (buf);
1195
1196 if (avih->us_frame != 0 && avih->tot_frames != 0)
1197 avi->duration =
1198 (guint64) avih->us_frame * (guint64) avih->tot_frames * 1000;
1199 else
1200 avi->duration = GST_CLOCK_TIME_NONE;
1201
1202 GST_INFO_OBJECT (avi, " header duration %" GST_TIME_FORMAT,
1203 GST_TIME_ARGS (avi->duration));
1204
1205 return TRUE;
1206
1207 /* ERRORS */
1208 no_buffer:
1209 {
1210 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("No buffer"));
1211 return FALSE;
1212 }
1213 avih_too_small:
1214 {
1215 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
1216 ("Too small avih (%" G_GSIZE_FORMAT " available, %d needed)",
1217 size, (int) sizeof (gst_riff_avih)));
1218 gst_buffer_unref (buf);
1219 return FALSE;
1220 }
1221 }
1222
1223 /*
1224 * gst_avi_demux_parse_superindex:
1225 * @avi: caller element (used for debugging/errors).
1226 * @buf: input data to use for parsing.
1227 * @locations: locations in the file (byte-offsets) that contain
1228 * the actual indexes (see get_avi_demux_parse_subindex()).
1229 * The array ends with GST_BUFFER_OFFSET_NONE.
1230 *
1231 * Reads superindex (openDML-2 spec stuff) from the provided data.
1232 *
1233 * Returns: TRUE on success, FALSE otherwise. Indexes should be skipped
1234 * on error, but they are not fatal.
1235 */
1236 static gboolean
gst_avi_demux_parse_superindex(GstAviDemux * avi,GstBuffer * buf,guint64 ** _indexes)1237 gst_avi_demux_parse_superindex (GstAviDemux * avi,
1238 GstBuffer * buf, guint64 ** _indexes)
1239 {
1240 GstMapInfo map;
1241 guint8 *data;
1242 guint16 bpe = 16;
1243 guint32 num, i;
1244 guint64 *indexes;
1245 gsize size;
1246
1247 *_indexes = NULL;
1248
1249 if (buf) {
1250 gst_buffer_map (buf, &map, GST_MAP_READ);
1251 data = map.data;
1252 size = map.size;
1253 } else {
1254 data = NULL;
1255 size = 0;
1256 }
1257
1258 if (size < 24)
1259 goto too_small;
1260
1261 /* check type of index. The opendml2 specs state that
1262 * there should be 4 dwords per array entry. Type can be
1263 * either frame or field (and we don't care). */
1264 if (GST_READ_UINT16_LE (data) != 4 ||
1265 (data[2] & 0xfe) != 0x0 || data[3] != 0x0) {
1266 GST_WARNING_OBJECT (avi,
1267 "Superindex for stream has unexpected "
1268 "size_entry %d (bytes) or flags 0x%02x/0x%02x",
1269 GST_READ_UINT16_LE (data), data[2], data[3]);
1270 bpe = GST_READ_UINT16_LE (data) * 4;
1271 }
1272 num = GST_READ_UINT32_LE (&data[4]);
1273
1274 GST_DEBUG_OBJECT (avi, "got %d indexes", num);
1275
1276 /* this can't work out well ... */
1277 if (num > G_MAXUINT32 >> 1 || bpe < 8) {
1278 goto invalid_params;
1279 }
1280
1281 indexes = g_new (guint64, num + 1);
1282 for (i = 0; i < num; i++) {
1283 if (size < 24 + bpe * (i + 1))
1284 break;
1285 indexes[i] = GST_READ_UINT64_LE (&data[24 + bpe * i]);
1286 GST_DEBUG_OBJECT (avi, "index %d at %" G_GUINT64_FORMAT, i, indexes[i]);
1287 }
1288 indexes[i] = GST_BUFFER_OFFSET_NONE;
1289 *_indexes = indexes;
1290
1291 gst_buffer_unmap (buf, &map);
1292 gst_buffer_unref (buf);
1293
1294 return TRUE;
1295
1296 /* ERRORS */
1297 too_small:
1298 {
1299 GST_ERROR_OBJECT (avi,
1300 "Not enough data to parse superindex (%" G_GSIZE_FORMAT
1301 " available, 24 needed)", size);
1302 if (buf) {
1303 gst_buffer_unmap (buf, &map);
1304 gst_buffer_unref (buf);
1305 }
1306 return FALSE;
1307 }
1308 invalid_params:
1309 {
1310 GST_ERROR_OBJECT (avi, "invalid index parameters (num = %d, bpe = %d)",
1311 num, bpe);
1312 gst_buffer_unmap (buf, &map);
1313 gst_buffer_unref (buf);
1314 return FALSE;
1315 }
1316 }
1317
1318 /* add an entry to the index of a stream. @num should be an estimate of the
1319 * total amount of index entries for all streams and is used to dynamically
1320 * allocate memory for the index entries. */
1321 static inline gboolean
gst_avi_demux_add_index(GstAviDemux * avi,GstAviStream * stream,guint num,GstAviIndexEntry * entry)1322 gst_avi_demux_add_index (GstAviDemux * avi, GstAviStream * stream,
1323 guint num, GstAviIndexEntry * entry)
1324 {
1325 /* ensure index memory */
1326 if (G_UNLIKELY (stream->idx_n >= stream->idx_max)) {
1327 guint idx_max = stream->idx_max;
1328 GstAviIndexEntry *new_idx;
1329
1330 /* we need to make some more room */
1331 if (idx_max == 0) {
1332 /* initial size guess, assume each stream has an equal amount of entries,
1333 * overshoot with at least 8K */
1334 idx_max = (num / avi->num_streams) + (8192 / sizeof (GstAviIndexEntry));
1335 } else {
1336 idx_max += 8192 / sizeof (GstAviIndexEntry);
1337 GST_DEBUG_OBJECT (avi, "expanded index from %u to %u",
1338 stream->idx_max, idx_max);
1339 }
1340 new_idx = g_try_renew (GstAviIndexEntry, stream->index, idx_max);
1341 /* out of memory, if this fails stream->index is untouched. */
1342 if (G_UNLIKELY (!new_idx))
1343 return FALSE;
1344 /* use new index */
1345 stream->index = new_idx;
1346 stream->idx_max = idx_max;
1347 }
1348
1349 /* update entry total and stream stats. The entry total can be converted to
1350 * the timestamp of the entry easily. */
1351 if (stream->strh->type == GST_RIFF_FCC_auds) {
1352 gint blockalign;
1353
1354 if (stream->is_vbr) {
1355 entry->total = stream->total_blocks;
1356 } else {
1357 entry->total = stream->total_bytes;
1358 }
1359 blockalign = stream->strf.auds->blockalign;
1360 if (blockalign > 0)
1361 stream->total_blocks += DIV_ROUND_UP (entry->size, blockalign);
1362 else
1363 stream->total_blocks++;
1364 } else {
1365 if (stream->is_vbr) {
1366 entry->total = stream->idx_n;
1367 } else {
1368 entry->total = stream->total_bytes;
1369 }
1370 }
1371 stream->total_bytes += entry->size;
1372 if (ENTRY_IS_KEYFRAME (entry))
1373 stream->n_keyframes++;
1374
1375 /* and add */
1376 GST_LOG_OBJECT (avi,
1377 "Adding stream %u, index entry %d, kf %d, size %u "
1378 ", offset %" G_GUINT64_FORMAT ", total %" G_GUINT64_FORMAT, stream->num,
1379 stream->idx_n, ENTRY_IS_KEYFRAME (entry), entry->size, entry->offset,
1380 entry->total);
1381 stream->index[stream->idx_n++] = *entry;
1382
1383 return TRUE;
1384 }
1385
1386 /* given @entry_n in @stream, calculate info such as timestamps and
1387 * offsets for the entry. */
1388 static void
gst_avi_demux_get_buffer_info(GstAviDemux * avi,GstAviStream * stream,guint entry_n,GstClockTime * timestamp,GstClockTime * ts_end,guint64 * offset,guint64 * offset_end)1389 gst_avi_demux_get_buffer_info (GstAviDemux * avi, GstAviStream * stream,
1390 guint entry_n, GstClockTime * timestamp, GstClockTime * ts_end,
1391 guint64 * offset, guint64 * offset_end)
1392 {
1393 GstAviIndexEntry *entry;
1394
1395 entry = &stream->index[entry_n];
1396
1397 if (stream->is_vbr) {
1398 /* VBR stream next timestamp */
1399 if (stream->strh->type == GST_RIFF_FCC_auds) {
1400 if (timestamp)
1401 *timestamp =
1402 avi_stream_convert_frames_to_time_unchecked (stream, entry->total);
1403 if (ts_end) {
1404 gint size = 1;
1405 if (G_LIKELY (entry_n + 1 < stream->idx_n))
1406 size = stream->index[entry_n + 1].total - entry->total;
1407 *ts_end = avi_stream_convert_frames_to_time_unchecked (stream,
1408 entry->total + size);
1409 }
1410 } else {
1411 if (timestamp)
1412 *timestamp =
1413 avi_stream_convert_frames_to_time_unchecked (stream, entry_n);
1414 if (ts_end)
1415 *ts_end = avi_stream_convert_frames_to_time_unchecked (stream,
1416 entry_n + 1);
1417 }
1418 } else if (stream->strh->type == GST_RIFF_FCC_auds) {
1419 /* constant rate stream */
1420 if (timestamp)
1421 *timestamp =
1422 avi_stream_convert_bytes_to_time_unchecked (stream, entry->total);
1423 if (ts_end)
1424 *ts_end = avi_stream_convert_bytes_to_time_unchecked (stream,
1425 entry->total + entry->size);
1426 }
1427 if (stream->strh->type == GST_RIFF_FCC_vids) {
1428 /* video offsets are the frame number */
1429 if (offset)
1430 *offset = entry_n;
1431 if (offset_end)
1432 *offset_end = entry_n + 1;
1433 } else {
1434 /* no offsets for audio */
1435 if (offset)
1436 *offset = -1;
1437 if (offset_end)
1438 *offset_end = -1;
1439 }
1440 }
1441
1442 /* collect and debug stats about the indexes for all streams.
1443 * This method is also responsible for filling in the stream duration
1444 * as measured by the amount of index entries.
1445 *
1446 * Returns TRUE if the index is not empty, else FALSE */
1447 static gboolean
gst_avi_demux_do_index_stats(GstAviDemux * avi)1448 gst_avi_demux_do_index_stats (GstAviDemux * avi)
1449 {
1450 guint total_idx = 0;
1451 guint i;
1452 #ifndef GST_DISABLE_GST_DEBUG
1453 guint total_max = 0;
1454 #endif
1455
1456 /* get stream stats now */
1457 for (i = 0; i < avi->num_streams; i++) {
1458 GstAviStream *stream;
1459
1460 if (G_UNLIKELY (!(stream = &avi->stream[i])))
1461 continue;
1462 if (G_UNLIKELY (!stream->strh))
1463 continue;
1464 if (G_UNLIKELY (!stream->index || stream->idx_n == 0))
1465 continue;
1466
1467 /* we interested in the end_ts of the last entry, which is the total
1468 * duration of this stream */
1469 gst_avi_demux_get_buffer_info (avi, stream, stream->idx_n - 1,
1470 NULL, &stream->idx_duration, NULL, NULL);
1471
1472 total_idx += stream->idx_n;
1473 #ifndef GST_DISABLE_GST_DEBUG
1474 total_max += stream->idx_max;
1475 #endif
1476 GST_INFO_OBJECT (avi, "Stream %d, dur %" GST_TIME_FORMAT ", %6u entries, "
1477 "%5u keyframes, entry size = %2u, total size = %10u, allocated %10u",
1478 i, GST_TIME_ARGS (stream->idx_duration), stream->idx_n,
1479 stream->n_keyframes, (guint) sizeof (GstAviIndexEntry),
1480 (guint) (stream->idx_n * sizeof (GstAviIndexEntry)),
1481 (guint) (stream->idx_max * sizeof (GstAviIndexEntry)));
1482
1483 /* knowing all that we do, that also includes avg bitrate */
1484 if (!stream->taglist) {
1485 stream->taglist = gst_tag_list_new_empty ();
1486 }
1487 if (stream->total_bytes && stream->idx_duration)
1488 gst_tag_list_add (stream->taglist, GST_TAG_MERGE_REPLACE,
1489 GST_TAG_BITRATE,
1490 (guint) gst_util_uint64_scale (stream->total_bytes * 8,
1491 GST_SECOND, stream->idx_duration), NULL);
1492 }
1493 total_idx *= sizeof (GstAviIndexEntry);
1494 #ifndef GST_DISABLE_GST_DEBUG
1495 total_max *= sizeof (GstAviIndexEntry);
1496 #endif
1497 GST_INFO_OBJECT (avi, "%u bytes for index vs %u ideally, %u wasted",
1498 total_max, total_idx, total_max - total_idx);
1499
1500 if (total_idx == 0) {
1501 GST_WARNING_OBJECT (avi, "Index is empty !");
1502 return FALSE;
1503 }
1504 return TRUE;
1505 }
1506
1507 /*
1508 * gst_avi_demux_parse_subindex:
1509 * @avi: Avi object
1510 * @buf: input data to use for parsing.
1511 * @stream: stream context.
1512 * @entries_list: a list (returned by the function) containing all the
1513 * indexes parsed in this specific subindex. The first
1514 * entry is also a pointer to allocated memory that needs
1515 * to be free´ed. May be NULL if no supported indexes were
1516 * found.
1517 *
1518 * Reads superindex (openDML-2 spec stuff) from the provided data.
1519 * The buffer should contain a GST_RIFF_TAG_ix?? chunk.
1520 *
1521 * Returns: TRUE on success, FALSE otherwise. Errors are fatal, we
1522 * throw an error, caller should bail out asap.
1523 */
1524 static gboolean
gst_avi_demux_parse_subindex(GstAviDemux * avi,GstAviStream * stream,GstBuffer * buf)1525 gst_avi_demux_parse_subindex (GstAviDemux * avi, GstAviStream * stream,
1526 GstBuffer * buf)
1527 {
1528 GstMapInfo map;
1529 guint8 *data;
1530 guint16 bpe;
1531 guint32 num, i;
1532 guint64 baseoff;
1533
1534 if (buf == NULL)
1535 return TRUE;
1536
1537 gst_buffer_map (buf, &map, GST_MAP_READ);
1538 data = map.data;
1539
1540 /* check size */
1541 if (map.size < 24)
1542 goto too_small;
1543
1544 /* We don't support index-data yet */
1545 if (data[3] & 0x80)
1546 goto not_implemented;
1547
1548 /* check type of index. The opendml2 specs state that
1549 * there should be 4 dwords per array entry. Type can be
1550 * either frame or field (and we don't care). */
1551 bpe = (data[2] & 0x01) ? 12 : 8;
1552 if (GST_READ_UINT16_LE (data) != bpe / 4 ||
1553 (data[2] & 0xfe) != 0x0 || data[3] != 0x1) {
1554 GST_WARNING_OBJECT (avi,
1555 "Superindex for stream %d has unexpected "
1556 "size_entry %d (bytes) or flags 0x%02x/0x%02x",
1557 stream->num, GST_READ_UINT16_LE (data), data[2], data[3]);
1558 bpe = GST_READ_UINT16_LE (data) * 4;
1559 }
1560 num = GST_READ_UINT32_LE (&data[4]);
1561 baseoff = GST_READ_UINT64_LE (&data[12]);
1562
1563 /* If there's nothing, just return ! */
1564 if (num == 0)
1565 goto empty_index;
1566
1567 GST_INFO_OBJECT (avi, "Parsing subindex, nr_entries = %6d", num);
1568
1569 for (i = 0; i < num; i++) {
1570 GstAviIndexEntry entry;
1571
1572 if (map.size < 24 + bpe * (i + 1))
1573 break;
1574
1575 /* fill in offset and size. offset contains the keyframe flag in the
1576 * upper bit*/
1577 entry.offset = baseoff + GST_READ_UINT32_LE (&data[24 + bpe * i]);
1578 entry.size = GST_READ_UINT32_LE (&data[24 + bpe * i + 4]);
1579 /* handle flags */
1580 if (stream->strh->type == GST_RIFF_FCC_auds) {
1581 /* all audio frames are keyframes */
1582 ENTRY_SET_KEYFRAME (&entry);
1583 } else {
1584 /* else read flags */
1585 entry.flags = (entry.size & 0x80000000) ? 0 : GST_AVI_KEYFRAME;
1586 }
1587 entry.size &= ~0x80000000;
1588
1589 /* and add */
1590 if (G_UNLIKELY (!gst_avi_demux_add_index (avi, stream, num, &entry)))
1591 goto out_of_mem;
1592 }
1593 done:
1594 gst_buffer_unmap (buf, &map);
1595 gst_buffer_unref (buf);
1596
1597 return TRUE;
1598
1599 /* ERRORS */
1600 too_small:
1601 {
1602 GST_ERROR_OBJECT (avi,
1603 "Not enough data to parse subindex (%" G_GSIZE_FORMAT
1604 " available, 24 needed)", map.size);
1605 goto done; /* continue */
1606 }
1607 not_implemented:
1608 {
1609 GST_ELEMENT_ERROR (avi, STREAM, NOT_IMPLEMENTED, (NULL),
1610 ("Subindex-is-data is not implemented"));
1611 gst_buffer_unmap (buf, &map);
1612 gst_buffer_unref (buf);
1613 return FALSE;
1614 }
1615 empty_index:
1616 {
1617 GST_DEBUG_OBJECT (avi, "the index is empty");
1618 goto done; /* continue */
1619 }
1620 out_of_mem:
1621 {
1622 GST_ELEMENT_ERROR (avi, RESOURCE, NO_SPACE_LEFT, (NULL),
1623 ("Cannot allocate memory for %u*%u=%u bytes",
1624 (guint) sizeof (GstAviIndexEntry), num,
1625 (guint) sizeof (GstAviIndexEntry) * num));
1626 gst_buffer_unmap (buf, &map);
1627 gst_buffer_unref (buf);
1628 return FALSE;
1629 }
1630 }
1631
1632 /*
1633 * Create and push a flushing seek event upstream
1634 */
1635 static gboolean
perform_seek_to_offset(GstAviDemux * demux,guint64 offset,guint32 seqnum)1636 perform_seek_to_offset (GstAviDemux * demux, guint64 offset, guint32 seqnum)
1637 {
1638 GstEvent *event;
1639 gboolean res = 0;
1640
1641 GST_DEBUG_OBJECT (demux, "Seeking to %" G_GUINT64_FORMAT, offset);
1642
1643 event =
1644 gst_event_new_seek (1.0, GST_FORMAT_BYTES,
1645 GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE, GST_SEEK_TYPE_SET, offset,
1646 GST_SEEK_TYPE_NONE, -1);
1647 gst_event_set_seqnum (event, seqnum);
1648 res = gst_pad_push_event (demux->sinkpad, event);
1649
1650 if (res)
1651 demux->offset = offset;
1652 return res;
1653 }
1654
1655 /*
1656 * Read AVI index when streaming
1657 */
1658 static gboolean
gst_avi_demux_read_subindexes_push(GstAviDemux * avi)1659 gst_avi_demux_read_subindexes_push (GstAviDemux * avi)
1660 {
1661 guint32 tag = 0, size;
1662 GstBuffer *buf = NULL;
1663 guint odml_stream;
1664
1665 GST_DEBUG_OBJECT (avi, "read subindexes for %d streams", avi->num_streams);
1666
1667 if (avi->odml_subidxs[avi->odml_subidx] != avi->offset)
1668 return FALSE;
1669
1670 if (!gst_avi_demux_peek_chunk (avi, &tag, &size))
1671 return TRUE;
1672
1673 /* this is the ODML chunk we expect */
1674 odml_stream = avi->odml_stream;
1675
1676 if ((tag != GST_MAKE_FOURCC ('i', 'x', '0' + odml_stream / 10,
1677 '0' + odml_stream % 10)) &&
1678 (tag != GST_MAKE_FOURCC ('0' + odml_stream / 10,
1679 '0' + odml_stream % 10, 'i', 'x'))) {
1680 GST_WARNING_OBJECT (avi, "Not an ix## chunk (%" GST_FOURCC_FORMAT ")",
1681 GST_FOURCC_ARGS (tag));
1682 return FALSE;
1683 }
1684
1685 avi->offset += 8 + GST_ROUND_UP_2 (size);
1686 /* flush chunk header so we get just the 'size' payload data */
1687 gst_adapter_flush (avi->adapter, 8);
1688 buf = gst_adapter_take_buffer (avi->adapter, size);
1689
1690 if (!gst_avi_demux_parse_subindex (avi, &avi->stream[odml_stream], buf))
1691 return FALSE;
1692
1693 /* we parsed the index, go to next subindex */
1694 avi->odml_subidx++;
1695
1696 if (avi->odml_subidxs[avi->odml_subidx] == GST_BUFFER_OFFSET_NONE) {
1697 /* we reached the end of the indexes for this stream, move to the next
1698 * stream to handle the first index */
1699 avi->odml_stream++;
1700 avi->odml_subidx = 0;
1701
1702 if (avi->odml_stream < avi->num_streams) {
1703 /* there are more indexes */
1704 avi->odml_subidxs = avi->stream[avi->odml_stream].indexes;
1705 } else {
1706 /* we're done, get stream stats now */
1707 avi->have_index = gst_avi_demux_do_index_stats (avi);
1708
1709 return TRUE;
1710 }
1711 }
1712
1713 /* seek to next index */
1714 return perform_seek_to_offset (avi, avi->odml_subidxs[avi->odml_subidx],
1715 avi->segment_seqnum);
1716 }
1717
1718 /*
1719 * Read AVI index
1720 */
1721 static void
gst_avi_demux_read_subindexes_pull(GstAviDemux * avi)1722 gst_avi_demux_read_subindexes_pull (GstAviDemux * avi)
1723 {
1724 guint32 tag;
1725 GstBuffer *buf;
1726 gint i, n;
1727
1728 GST_DEBUG_OBJECT (avi, "read subindexes for %d streams", avi->num_streams);
1729
1730 for (n = 0; n < avi->num_streams; n++) {
1731 GstAviStream *stream = &avi->stream[n];
1732
1733 if (stream->indexes == NULL)
1734 continue;
1735
1736 for (i = 0; stream->indexes[i] != GST_BUFFER_OFFSET_NONE; i++) {
1737 if (gst_riff_read_chunk (GST_ELEMENT_CAST (avi), avi->sinkpad,
1738 &stream->indexes[i], &tag, &buf) != GST_FLOW_OK)
1739 continue;
1740 else if ((tag != GST_MAKE_FOURCC ('i', 'x', '0' + stream->num / 10,
1741 '0' + stream->num % 10)) &&
1742 (tag != GST_MAKE_FOURCC ('0' + stream->num / 10,
1743 '0' + stream->num % 10, 'i', 'x'))) {
1744 /* Some ODML files (created by god knows what muxer) have a ##ix format
1745 * instead of the 'official' ix##. They are still valid though. */
1746 GST_WARNING_OBJECT (avi, "Not an ix## chunk (%" GST_FOURCC_FORMAT ")",
1747 GST_FOURCC_ARGS (tag));
1748 gst_buffer_unref (buf);
1749 continue;
1750 }
1751
1752 if (!gst_avi_demux_parse_subindex (avi, stream, buf))
1753 continue;
1754 }
1755
1756 g_free (stream->indexes);
1757 stream->indexes = NULL;
1758 }
1759 /* get stream stats now */
1760 avi->have_index = gst_avi_demux_do_index_stats (avi);
1761 }
1762
1763 /*
1764 * gst_avi_demux_riff_parse_vprp:
1765 * @element: caller element (used for debugging/error).
1766 * @buf: input data to be used for parsing, stripped from header.
1767 * @vprp: a pointer (returned by this function) to a filled-in vprp
1768 * structure. Caller should free it.
1769 *
1770 * Parses a video stream´s vprp. This function takes ownership of @buf.
1771 *
1772 * Returns: TRUE if parsing succeeded, otherwise FALSE. The stream
1773 * should be skipped on error, but it is not fatal.
1774 */
1775 static gboolean
gst_avi_demux_riff_parse_vprp(GstElement * element,GstBuffer * buf,gst_riff_vprp ** _vprp)1776 gst_avi_demux_riff_parse_vprp (GstElement * element,
1777 GstBuffer * buf, gst_riff_vprp ** _vprp)
1778 {
1779 gst_riff_vprp *vprp;
1780 gint k;
1781 gsize size;
1782
1783 g_return_val_if_fail (buf != NULL, FALSE);
1784 g_return_val_if_fail (_vprp != NULL, FALSE);
1785
1786 size = gst_buffer_get_size (buf);
1787
1788 if (size < G_STRUCT_OFFSET (gst_riff_vprp, field_info))
1789 goto too_small;
1790
1791 vprp = g_malloc (size);
1792 gst_buffer_extract (buf, 0, vprp, size);
1793
1794 #if (G_BYTE_ORDER == G_BIG_ENDIAN)
1795 vprp->format_token = GUINT32_FROM_LE (vprp->format_token);
1796 vprp->standard = GUINT32_FROM_LE (vprp->standard);
1797 vprp->vert_rate = GUINT32_FROM_LE (vprp->vert_rate);
1798 vprp->hor_t_total = GUINT32_FROM_LE (vprp->hor_t_total);
1799 vprp->vert_lines = GUINT32_FROM_LE (vprp->vert_lines);
1800 vprp->aspect = GUINT32_FROM_LE (vprp->aspect);
1801 vprp->width = GUINT32_FROM_LE (vprp->width);
1802 vprp->height = GUINT32_FROM_LE (vprp->height);
1803 vprp->fields = GUINT32_FROM_LE (vprp->fields);
1804 #endif
1805
1806 /* size checking */
1807 /* calculate fields based on size */
1808 k = (size - G_STRUCT_OFFSET (gst_riff_vprp, field_info)) / vprp->fields;
1809 if (vprp->fields > k) {
1810 GST_WARNING_OBJECT (element,
1811 "vprp header indicated %d fields, only %d available", vprp->fields, k);
1812 vprp->fields = k;
1813 }
1814 if (vprp->fields > GST_RIFF_VPRP_VIDEO_FIELDS) {
1815 GST_WARNING_OBJECT (element,
1816 "vprp header indicated %d fields, at most %d supported", vprp->fields,
1817 GST_RIFF_VPRP_VIDEO_FIELDS);
1818 vprp->fields = GST_RIFF_VPRP_VIDEO_FIELDS;
1819 }
1820 #if (G_BYTE_ORDER == G_BIG_ENDIAN)
1821 for (k = 0; k < vprp->fields; k++) {
1822 gst_riff_vprp_video_field_desc *fd;
1823
1824 fd = &vprp->field_info[k];
1825 fd->compressed_bm_height = GUINT32_FROM_LE (fd->compressed_bm_height);
1826 fd->compressed_bm_width = GUINT32_FROM_LE (fd->compressed_bm_width);
1827 fd->valid_bm_height = GUINT32_FROM_LE (fd->valid_bm_height);
1828 fd->valid_bm_width = GUINT16_FROM_LE (fd->valid_bm_width);
1829 fd->valid_bm_x_offset = GUINT16_FROM_LE (fd->valid_bm_x_offset);
1830 fd->valid_bm_y_offset = GUINT32_FROM_LE (fd->valid_bm_y_offset);
1831 fd->video_x_t_offset = GUINT32_FROM_LE (fd->video_x_t_offset);
1832 fd->video_y_start = GUINT32_FROM_LE (fd->video_y_start);
1833 }
1834 #endif
1835
1836 /* debug */
1837 GST_INFO_OBJECT (element, "vprp tag found in context vids:");
1838 GST_INFO_OBJECT (element, " format_token %d", vprp->format_token);
1839 GST_INFO_OBJECT (element, " standard %d", vprp->standard);
1840 GST_INFO_OBJECT (element, " vert_rate %d", vprp->vert_rate);
1841 GST_INFO_OBJECT (element, " hor_t_total %d", vprp->hor_t_total);
1842 GST_INFO_OBJECT (element, " vert_lines %d", vprp->vert_lines);
1843 GST_INFO_OBJECT (element, " aspect %d:%d", vprp->aspect >> 16,
1844 vprp->aspect & 0xffff);
1845 GST_INFO_OBJECT (element, " width %d", vprp->width);
1846 GST_INFO_OBJECT (element, " height %d", vprp->height);
1847 GST_INFO_OBJECT (element, " fields %d", vprp->fields);
1848 for (k = 0; k < vprp->fields; k++) {
1849 gst_riff_vprp_video_field_desc *fd;
1850
1851 fd = &(vprp->field_info[k]);
1852 GST_INFO_OBJECT (element, " field %u description:", k);
1853 GST_INFO_OBJECT (element, " compressed_bm_height %d",
1854 fd->compressed_bm_height);
1855 GST_INFO_OBJECT (element, " compressed_bm_width %d",
1856 fd->compressed_bm_width);
1857 GST_INFO_OBJECT (element, " valid_bm_height %d",
1858 fd->valid_bm_height);
1859 GST_INFO_OBJECT (element, " valid_bm_width %d", fd->valid_bm_width);
1860 GST_INFO_OBJECT (element, " valid_bm_x_offset %d",
1861 fd->valid_bm_x_offset);
1862 GST_INFO_OBJECT (element, " valid_bm_y_offset %d",
1863 fd->valid_bm_y_offset);
1864 GST_INFO_OBJECT (element, " video_x_t_offset %d",
1865 fd->video_x_t_offset);
1866 GST_INFO_OBJECT (element, " video_y_start %d", fd->video_y_start);
1867 }
1868
1869 gst_buffer_unref (buf);
1870
1871 *_vprp = vprp;
1872
1873 return TRUE;
1874
1875 /* ERRORS */
1876 too_small:
1877 {
1878 GST_ERROR_OBJECT (element,
1879 "Too small vprp (%" G_GSIZE_FORMAT " available, at least %d needed)",
1880 size, (int) G_STRUCT_OFFSET (gst_riff_vprp, field_info));
1881 gst_buffer_unref (buf);
1882 return FALSE;
1883 }
1884 }
1885
1886 static void
gst_avi_demux_expose_streams(GstAviDemux * avi,gboolean force)1887 gst_avi_demux_expose_streams (GstAviDemux * avi, gboolean force)
1888 {
1889 guint i;
1890
1891 GST_DEBUG_OBJECT (avi, "force : %d", force);
1892
1893 for (i = 0; i < avi->num_streams; i++) {
1894 GstAviStream *stream = &avi->stream[i];
1895
1896 if (force || stream->idx_n != 0) {
1897 GST_LOG_OBJECT (avi, "Adding pad %s", GST_PAD_NAME (stream->pad));
1898 gst_element_add_pad ((GstElement *) avi, stream->pad);
1899 gst_flow_combiner_add_pad (avi->flowcombiner, stream->pad);
1900
1901 #if 0
1902 if (avi->element_index)
1903 gst_index_get_writer_id (avi->element_index,
1904 GST_OBJECT_CAST (stream->pad), &stream->index_id);
1905 #endif
1906
1907 stream->exposed = TRUE;
1908 if (avi->main_stream == -1)
1909 avi->main_stream = i;
1910 } else {
1911 GST_WARNING_OBJECT (avi, "Stream #%d doesn't have any entry, removing it",
1912 i);
1913 gst_avi_demux_reset_stream (avi, stream);
1914 }
1915 }
1916 }
1917
1918 /* buf contains LIST chunk data, and will be padded to even size,
1919 * since some buggy files do not account for the padding of chunks
1920 * within a LIST in the size of the LIST */
1921 static inline void
gst_avi_demux_roundup_list(GstAviDemux * avi,GstBuffer ** buf)1922 gst_avi_demux_roundup_list (GstAviDemux * avi, GstBuffer ** buf)
1923 {
1924 gsize size;
1925
1926 size = gst_buffer_get_size (*buf);
1927
1928 if (G_UNLIKELY (size & 1)) {
1929 GstBuffer *obuf;
1930 GstMapInfo map;
1931
1932 GST_DEBUG_OBJECT (avi, "rounding up dubious list size %" G_GSIZE_FORMAT,
1933 size);
1934 obuf = gst_buffer_new_and_alloc (size + 1);
1935
1936 gst_buffer_map (obuf, &map, GST_MAP_WRITE);
1937 gst_buffer_extract (*buf, 0, map.data, size);
1938 /* assume 0 padding, at least makes outcome deterministic */
1939 map.data[size] = 0;
1940 gst_buffer_unmap (obuf, &map);
1941 gst_buffer_replace (buf, obuf);
1942 }
1943 }
1944
1945 static GstCaps *
gst_avi_demux_check_caps(GstAviDemux * avi,GstAviStream * stream,GstCaps * caps)1946 gst_avi_demux_check_caps (GstAviDemux * avi, GstAviStream * stream,
1947 GstCaps * caps)
1948 {
1949 GstStructure *s;
1950 const GValue *val;
1951 GstBuffer *buf;
1952
1953 caps = gst_caps_make_writable (caps);
1954
1955 s = gst_caps_get_structure (caps, 0);
1956 if (gst_structure_has_name (s, "video/x-raw")) {
1957 stream->is_raw = TRUE;
1958 stream->alignment = 32;
1959 if (!gst_structure_has_field (s, "pixel-aspect-ratio"))
1960 gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION,
1961 1, 1, NULL);
1962 if (gst_structure_has_field_typed (s, "palette_data", GST_TYPE_BUFFER)) {
1963 gst_structure_get (s, "palette_data", GST_TYPE_BUFFER,
1964 &stream->rgb8_palette, NULL);
1965 gst_structure_remove_field (s, "palette_data");
1966 return caps;
1967 }
1968 } else if (!gst_structure_has_name (s, "video/x-h264")) {
1969 return caps;
1970 }
1971
1972 GST_DEBUG_OBJECT (avi, "checking caps %" GST_PTR_FORMAT, caps);
1973
1974 /* some muxers put invalid bytestream stuff in h264 extra data */
1975 val = gst_structure_get_value (s, "codec_data");
1976 if (val && (buf = gst_value_get_buffer (val))) {
1977 guint8 *data;
1978 gint size;
1979 GstMapInfo map;
1980
1981 gst_buffer_map (buf, &map, GST_MAP_READ);
1982 data = map.data;
1983 size = map.size;
1984 if (size >= 4) {
1985 guint32 h = GST_READ_UINT32_BE (data);
1986 gst_buffer_unmap (buf, &map);
1987 if (h == 0x01) {
1988 /* can hardly be valid AVC codec data */
1989 GST_DEBUG_OBJECT (avi,
1990 "discarding invalid codec_data containing byte-stream");
1991 /* so do not pretend to downstream that it is packetized avc */
1992 gst_structure_remove_field (s, "codec_data");
1993 /* ... but rather properly parsed bytestream */
1994 gst_structure_set (s, "stream-format", G_TYPE_STRING, "byte-stream",
1995 "alignment", G_TYPE_STRING, "au", NULL);
1996 }
1997 } else {
1998 gst_buffer_unmap (buf, &map);
1999 }
2000 }
2001
2002 return caps;
2003 }
2004
2005 /*
2006 * gst_avi_demux_parse_stream:
2007 * @avi: calling element (used for debugging/errors).
2008 * @buf: input buffer used to parse the stream.
2009 *
2010 * Parses all subchunks in a strl chunk (which defines a single
2011 * stream). Discards the buffer after use. This function will
2012 * increment the stream counter internally.
2013 *
2014 * Returns: whether the stream was identified successfully.
2015 * Errors are not fatal. It does indicate the stream
2016 * was skipped.
2017 */
2018 static gboolean
gst_avi_demux_parse_stream(GstAviDemux * avi,GstBuffer * buf)2019 gst_avi_demux_parse_stream (GstAviDemux * avi, GstBuffer * buf)
2020 {
2021 GstAviStream *stream;
2022 GstElementClass *klass;
2023 GstPadTemplate *templ;
2024 GstBuffer *sub = NULL;
2025 guint offset = 4;
2026 guint32 tag = 0;
2027 gchar *codec_name = NULL, *padname = NULL;
2028 const gchar *tag_name;
2029 GstCaps *caps = NULL;
2030 GstPad *pad;
2031 GstElement *element;
2032 gboolean got_strh = FALSE, got_strf = FALSE, got_vprp = FALSE;
2033 gst_riff_vprp *vprp = NULL;
2034 GstEvent *event;
2035 gchar *stream_id;
2036 GstMapInfo map;
2037 gboolean sparse = FALSE;
2038
2039 element = GST_ELEMENT_CAST (avi);
2040
2041 GST_DEBUG_OBJECT (avi, "Parsing stream");
2042
2043 gst_avi_demux_roundup_list (avi, &buf);
2044
2045 if (avi->num_streams >= GST_AVI_DEMUX_MAX_STREAMS) {
2046 GST_WARNING_OBJECT (avi,
2047 "maximum no of streams (%d) exceeded, ignoring stream",
2048 GST_AVI_DEMUX_MAX_STREAMS);
2049 gst_buffer_unref (buf);
2050 /* not a fatal error, let's say */
2051 return TRUE;
2052 }
2053
2054 stream = &avi->stream[avi->num_streams];
2055
2056 /* initial settings */
2057 stream->idx_duration = GST_CLOCK_TIME_NONE;
2058 stream->hdr_duration = GST_CLOCK_TIME_NONE;
2059 stream->duration = GST_CLOCK_TIME_NONE;
2060
2061 while (gst_riff_parse_chunk (element, buf, &offset, &tag, &sub)) {
2062 /* sub can be NULL if the chunk is empty */
2063 if (sub == NULL) {
2064 GST_DEBUG_OBJECT (avi, "ignoring empty chunk %" GST_FOURCC_FORMAT,
2065 GST_FOURCC_ARGS (tag));
2066 continue;
2067 }
2068 switch (tag) {
2069 case GST_RIFF_TAG_strh:
2070 {
2071 gst_riff_strh *strh;
2072
2073 if (got_strh) {
2074 GST_WARNING_OBJECT (avi, "Ignoring additional strh chunk");
2075 break;
2076 }
2077 if (!gst_riff_parse_strh (element, sub, &stream->strh)) {
2078 /* ownership given away */
2079 sub = NULL;
2080 GST_WARNING_OBJECT (avi, "Failed to parse strh chunk");
2081 goto fail;
2082 }
2083 sub = NULL;
2084 strh = stream->strh;
2085 /* sanity check; stream header frame rate matches global header
2086 * frame duration */
2087 if (stream->strh->type == GST_RIFF_FCC_vids) {
2088 GstClockTime s_dur;
2089 GstClockTime h_dur = avi->avih->us_frame * GST_USECOND;
2090
2091 s_dur = gst_util_uint64_scale (GST_SECOND, strh->scale, strh->rate);
2092 GST_DEBUG_OBJECT (avi, "verifying stream framerate %d/%d, "
2093 "frame duration = %d ms", strh->rate, strh->scale,
2094 (gint) (s_dur / GST_MSECOND));
2095 if (h_dur > (10 * GST_MSECOND) && (s_dur > 10 * h_dur)) {
2096 strh->rate = GST_SECOND / GST_USECOND;
2097 strh->scale = h_dur / GST_USECOND;
2098 GST_DEBUG_OBJECT (avi, "correcting stream framerate to %d/%d",
2099 strh->rate, strh->scale);
2100 }
2101 }
2102 /* determine duration as indicated by header */
2103 stream->hdr_duration = gst_util_uint64_scale ((guint64) strh->length *
2104 strh->scale, GST_SECOND, (guint64) strh->rate);
2105 GST_INFO ("Stream duration according to header: %" GST_TIME_FORMAT,
2106 GST_TIME_ARGS (stream->hdr_duration));
2107 if (stream->hdr_duration == 0)
2108 stream->hdr_duration = GST_CLOCK_TIME_NONE;
2109
2110 got_strh = TRUE;
2111 break;
2112 }
2113 case GST_RIFF_TAG_strf:
2114 {
2115 gboolean res = FALSE;
2116
2117 if (got_strf) {
2118 GST_WARNING_OBJECT (avi, "Ignoring additional strf chunk");
2119 break;
2120 }
2121 if (!got_strh) {
2122 GST_ERROR_OBJECT (avi, "Found strf chunk before strh chunk");
2123 goto fail;
2124 }
2125 switch (stream->strh->type) {
2126 case GST_RIFF_FCC_vids:
2127 stream->is_vbr = TRUE;
2128 res = gst_riff_parse_strf_vids (element, sub,
2129 &stream->strf.vids, &stream->extradata);
2130 sub = NULL;
2131 GST_DEBUG_OBJECT (element, "marking video as VBR, res %d", res);
2132 break;
2133 case GST_RIFF_FCC_auds:
2134 res =
2135 gst_riff_parse_strf_auds (element, sub, &stream->strf.auds,
2136 &stream->extradata);
2137 sub = NULL;
2138 if (!res)
2139 break;
2140 stream->is_vbr = (stream->strh->samplesize == 0)
2141 && stream->strh->scale > 1
2142 && stream->strf.auds->blockalign != 1;
2143 GST_DEBUG_OBJECT (element, "marking audio as VBR:%d, res %d",
2144 stream->is_vbr, res);
2145 /* we need these or we have no way to come up with timestamps */
2146 if ((!stream->is_vbr && !stream->strf.auds->av_bps) ||
2147 (stream->is_vbr && (!stream->strh->scale ||
2148 !stream->strh->rate))) {
2149 GST_WARNING_OBJECT (element,
2150 "invalid audio header, ignoring stream");
2151 goto fail;
2152 }
2153 /* some more sanity checks */
2154 if (stream->is_vbr) {
2155 if (stream->strf.auds->blockalign <= 4) {
2156 /* that would mean (too) many frames per chunk,
2157 * so not likely set as expected */
2158 GST_DEBUG_OBJECT (element,
2159 "suspicious blockalign %d for VBR audio; "
2160 "overriding to 1 frame per chunk",
2161 stream->strf.auds->blockalign);
2162 /* this should top any likely value */
2163 stream->strf.auds->blockalign = (1 << 12);
2164 }
2165 }
2166 break;
2167 case GST_RIFF_FCC_iavs:
2168 stream->is_vbr = TRUE;
2169 res = gst_riff_parse_strf_iavs (element, sub,
2170 &stream->strf.iavs, &stream->extradata);
2171 sub = NULL;
2172 GST_DEBUG_OBJECT (element, "marking iavs as VBR, res %d", res);
2173 break;
2174 case GST_RIFF_FCC_txts:
2175 /* nothing to parse here */
2176 stream->is_vbr = (stream->strh->samplesize == 0)
2177 && (stream->strh->scale > 1);
2178 res = TRUE;
2179 break;
2180 default:
2181 GST_ERROR_OBJECT (avi,
2182 "Don´t know how to handle stream type %" GST_FOURCC_FORMAT,
2183 GST_FOURCC_ARGS (stream->strh->type));
2184 break;
2185 }
2186 if (sub) {
2187 gst_buffer_unref (sub);
2188 sub = NULL;
2189 }
2190 if (!res)
2191 goto fail;
2192 got_strf = TRUE;
2193 break;
2194 }
2195 case GST_RIFF_TAG_vprp:
2196 {
2197 if (got_vprp) {
2198 GST_WARNING_OBJECT (avi, "Ignoring additional vprp chunk");
2199 break;
2200 }
2201 if (!got_strh) {
2202 GST_ERROR_OBJECT (avi, "Found vprp chunk before strh chunk");
2203 goto fail;
2204 }
2205 if (!got_strf) {
2206 GST_ERROR_OBJECT (avi, "Found vprp chunk before strf chunk");
2207 goto fail;
2208 }
2209
2210 if (!gst_avi_demux_riff_parse_vprp (element, sub, &vprp)) {
2211 GST_WARNING_OBJECT (avi, "Failed to parse vprp chunk");
2212 /* not considered fatal */
2213 g_free (vprp);
2214 vprp = NULL;
2215 } else
2216 got_vprp = TRUE;
2217 sub = NULL;
2218 break;
2219 }
2220 case GST_RIFF_TAG_strd:
2221 if (stream->initdata)
2222 gst_buffer_unref (stream->initdata);
2223 stream->initdata = sub;
2224 if (sub != NULL) {
2225 gst_avi_demux_parse_strd (avi, sub);
2226 sub = NULL;
2227 }
2228 break;
2229 case GST_RIFF_TAG_strn:
2230 g_free (stream->name);
2231
2232 gst_buffer_map (sub, &map, GST_MAP_READ);
2233
2234 if (avi->globaltags == NULL)
2235 avi->globaltags = gst_tag_list_new_empty ();
2236 parse_tag_value (avi, avi->globaltags, GST_TAG_TITLE,
2237 map.data, map.size);
2238
2239 if (gst_tag_list_get_string (avi->globaltags, GST_TAG_TITLE,
2240 &stream->name))
2241 GST_DEBUG_OBJECT (avi, "stream name: %s", stream->name);
2242
2243 gst_buffer_unmap (sub, &map);
2244 gst_buffer_unref (sub);
2245 sub = NULL;
2246 break;
2247 case GST_RIFF_IDIT:
2248 gst_avi_demux_parse_idit (avi, sub);
2249 break;
2250 default:
2251 if (tag == GST_MAKE_FOURCC ('i', 'n', 'd', 'x') ||
2252 tag == GST_MAKE_FOURCC ('i', 'x', '0' + avi->num_streams / 10,
2253 '0' + avi->num_streams % 10)) {
2254 g_free (stream->indexes);
2255 gst_avi_demux_parse_superindex (avi, sub, &stream->indexes);
2256 stream->superindex = TRUE;
2257 sub = NULL;
2258 break;
2259 }
2260 GST_WARNING_OBJECT (avi,
2261 "Unknown stream header tag %" GST_FOURCC_FORMAT ", ignoring",
2262 GST_FOURCC_ARGS (tag));
2263 /* Only get buffer for debugging if the memdump is needed */
2264 if (gst_debug_category_get_threshold (GST_CAT_DEFAULT) >= 9) {
2265 GstMapInfo map;
2266
2267 gst_buffer_map (sub, &map, GST_MAP_READ);
2268 GST_MEMDUMP_OBJECT (avi, "Unknown stream header tag", map.data,
2269 map.size);
2270 gst_buffer_unmap (sub, &map);
2271 }
2272 /* fall-through */
2273 case GST_RIFF_TAG_JUNQ:
2274 case GST_RIFF_TAG_JUNK:
2275 break;
2276 }
2277 if (sub != NULL) {
2278 gst_buffer_unref (sub);
2279 sub = NULL;
2280 }
2281 }
2282
2283 if (!got_strh) {
2284 GST_WARNING_OBJECT (avi, "Failed to find strh chunk");
2285 goto fail;
2286 }
2287
2288 if (!got_strf) {
2289 GST_WARNING_OBJECT (avi, "Failed to find strf chunk");
2290 goto fail;
2291 }
2292
2293 /* get class to figure out the template */
2294 klass = GST_ELEMENT_GET_CLASS (avi);
2295
2296 /* we now have all info, let´s set up a pad and a caps and be done */
2297 /* create stream name + pad */
2298 switch (stream->strh->type) {
2299 case GST_RIFF_FCC_vids:{
2300 guint32 fourcc;
2301
2302 fourcc = (stream->strf.vids->compression) ?
2303 stream->strf.vids->compression : stream->strh->fcc_handler;
2304 caps = gst_riff_create_video_caps (fourcc, stream->strh,
2305 stream->strf.vids, stream->extradata, stream->initdata, &codec_name);
2306
2307 /* DXSB is XSUB, and it is placed inside a vids */
2308 if (!caps || (fourcc != GST_MAKE_FOURCC ('D', 'X', 'S', 'B') &&
2309 fourcc != GST_MAKE_FOURCC ('D', 'X', 'S', 'A'))) {
2310 padname = g_strdup_printf ("video_%u", avi->num_v_streams);
2311 templ = gst_element_class_get_pad_template (klass, "video_%u");
2312 if (!caps) {
2313 caps = gst_caps_new_simple ("video/x-avi-unknown", "fourcc",
2314 G_TYPE_INT, fourcc, NULL);
2315 } else if (got_vprp && vprp) {
2316 guint32 aspect_n, aspect_d;
2317 gint n, d;
2318
2319 aspect_n = vprp->aspect >> 16;
2320 aspect_d = vprp->aspect & 0xffff;
2321 /* calculate the pixel aspect ratio using w/h and aspect ratio */
2322 n = aspect_n * stream->strf.vids->height;
2323 d = aspect_d * stream->strf.vids->width;
2324 if (n && d)
2325 gst_caps_set_simple (caps, "pixel-aspect-ratio", GST_TYPE_FRACTION,
2326 n, d, NULL);
2327 }
2328 caps = gst_avi_demux_check_caps (avi, stream, caps);
2329 tag_name = GST_TAG_VIDEO_CODEC;
2330 avi->num_v_streams++;
2331 } else {
2332 padname = g_strdup_printf ("subpicture_%u", avi->num_sp_streams);
2333 templ = gst_element_class_get_pad_template (klass, "subpicture_%u");
2334 tag_name = NULL;
2335 avi->num_sp_streams++;
2336 sparse = TRUE;
2337 }
2338 break;
2339 }
2340 case GST_RIFF_FCC_auds:{
2341 /* FIXME: Do something with the channel reorder map */
2342 padname = g_strdup_printf ("audio_%u", avi->num_a_streams);
2343 templ = gst_element_class_get_pad_template (klass, "audio_%u");
2344 caps = gst_riff_create_audio_caps (stream->strf.auds->format,
2345 stream->strh, stream->strf.auds, stream->extradata,
2346 stream->initdata, &codec_name, NULL);
2347 if (!caps) {
2348 caps = gst_caps_new_simple ("audio/x-avi-unknown", "codec_id",
2349 G_TYPE_INT, stream->strf.auds->format, NULL);
2350 }
2351 tag_name = GST_TAG_AUDIO_CODEC;
2352 avi->num_a_streams++;
2353 break;
2354 }
2355 case GST_RIFF_FCC_iavs:{
2356 guint32 fourcc = stream->strh->fcc_handler;
2357
2358 padname = g_strdup_printf ("video_%u", avi->num_v_streams);
2359 templ = gst_element_class_get_pad_template (klass, "video_%u");
2360 caps = gst_riff_create_iavs_caps (fourcc, stream->strh,
2361 stream->strf.iavs, stream->extradata, stream->initdata, &codec_name);
2362 if (!caps) {
2363 caps = gst_caps_new_simple ("video/x-avi-unknown", "fourcc",
2364 G_TYPE_INT, fourcc, NULL);
2365 }
2366 tag_name = GST_TAG_VIDEO_CODEC;
2367 avi->num_v_streams++;
2368 break;
2369 }
2370 case GST_RIFF_FCC_txts:{
2371 padname = g_strdup_printf ("subtitle_%u", avi->num_t_streams);
2372 templ = gst_element_class_get_pad_template (klass, "subtitle_%u");
2373 caps = gst_caps_new_empty_simple ("application/x-subtitle-avi");
2374 tag_name = NULL;
2375 avi->num_t_streams++;
2376 sparse = TRUE;
2377 break;
2378 }
2379 default:
2380 g_return_val_if_reached (FALSE);
2381 }
2382
2383 /* no caps means no stream */
2384 if (!caps) {
2385 GST_ERROR_OBJECT (element, "Did not find caps for stream %s", padname);
2386 goto fail;
2387 }
2388
2389 GST_DEBUG_OBJECT (element, "codec-name=%s", codec_name ? codec_name : "NULL");
2390 GST_DEBUG_OBJECT (element, "caps=%" GST_PTR_FORMAT, caps);
2391
2392 /* set proper settings and add it */
2393 if (stream->pad)
2394 gst_object_unref (stream->pad);
2395 pad = stream->pad = gst_pad_new_from_template (templ, padname);
2396 g_free (padname);
2397
2398 gst_pad_use_fixed_caps (pad);
2399 #if 0
2400 gst_pad_set_formats_function (pad,
2401 GST_DEBUG_FUNCPTR (gst_avi_demux_get_src_formats));
2402 gst_pad_set_event_mask_function (pad,
2403 GST_DEBUG_FUNCPTR (gst_avi_demux_get_event_mask));
2404 #endif
2405 gst_pad_set_event_function (pad,
2406 GST_DEBUG_FUNCPTR (gst_avi_demux_handle_src_event));
2407 gst_pad_set_query_function (pad,
2408 GST_DEBUG_FUNCPTR (gst_avi_demux_handle_src_query));
2409 #if 0
2410 gst_pad_set_convert_function (pad,
2411 GST_DEBUG_FUNCPTR (gst_avi_demux_src_convert));
2412 #endif
2413
2414 stream->num = avi->num_streams;
2415
2416 stream->start_entry = 0;
2417 stream->step_entry = 0;
2418 stream->stop_entry = 0;
2419
2420 stream->current_entry = -1;
2421 stream->current_total = 0;
2422
2423 stream->discont = TRUE;
2424
2425 stream->total_bytes = 0;
2426 stream->total_blocks = 0;
2427 stream->n_keyframes = 0;
2428
2429 stream->idx_n = 0;
2430 stream->idx_max = 0;
2431
2432 gst_pad_set_element_private (pad, stream);
2433 avi->num_streams++;
2434
2435 gst_pad_set_active (pad, TRUE);
2436 stream_id =
2437 gst_pad_create_stream_id_printf (pad, GST_ELEMENT_CAST (avi), "%03u",
2438 avi->num_streams);
2439
2440 event = gst_pad_get_sticky_event (avi->sinkpad, GST_EVENT_STREAM_START, 0);
2441 if (event) {
2442 if (gst_event_parse_group_id (event, &avi->group_id))
2443 avi->have_group_id = TRUE;
2444 else
2445 avi->have_group_id = FALSE;
2446 gst_event_unref (event);
2447 } else if (!avi->have_group_id) {
2448 avi->have_group_id = TRUE;
2449 avi->group_id = gst_util_group_id_next ();
2450 }
2451
2452 event = gst_event_new_stream_start (stream_id);
2453 if (avi->have_group_id)
2454 gst_event_set_group_id (event, avi->group_id);
2455 if (sparse)
2456 gst_event_set_stream_flags (event, GST_STREAM_FLAG_SPARSE);
2457
2458 gst_pad_push_event (pad, event);
2459 g_free (stream_id);
2460 gst_pad_set_caps (pad, caps);
2461 gst_caps_unref (caps);
2462
2463 /* make tags */
2464 if (codec_name && tag_name) {
2465 if (!stream->taglist)
2466 stream->taglist = gst_tag_list_new_empty ();
2467
2468 avi->got_tags = TRUE;
2469
2470 gst_tag_list_add (stream->taglist, GST_TAG_MERGE_APPEND, tag_name,
2471 codec_name, NULL);
2472 }
2473
2474 g_free (vprp);
2475 g_free (codec_name);
2476 gst_buffer_unref (buf);
2477
2478 return TRUE;
2479
2480 /* ERRORS */
2481 fail:
2482 {
2483 /* unref any mem that may be in use */
2484 if (buf)
2485 gst_buffer_unref (buf);
2486 if (sub)
2487 gst_buffer_unref (sub);
2488 g_free (vprp);
2489 g_free (codec_name);
2490 gst_avi_demux_reset_stream (avi, stream);
2491 avi->num_streams++;
2492 return FALSE;
2493 }
2494 }
2495
2496 /*
2497 * gst_avi_demux_parse_odml:
2498 * @avi: calling element (used for debug/error).
2499 * @buf: input buffer to be used for parsing.
2500 *
2501 * Read an openDML-2.0 extension header. Fills in the frame number
2502 * in the avi demuxer object when reading succeeds.
2503 */
2504 static void
gst_avi_demux_parse_odml(GstAviDemux * avi,GstBuffer * buf)2505 gst_avi_demux_parse_odml (GstAviDemux * avi, GstBuffer * buf)
2506 {
2507 guint32 tag = 0;
2508 guint offset = 4;
2509 GstBuffer *sub = NULL;
2510
2511 while (gst_riff_parse_chunk (GST_ELEMENT_CAST (avi), buf, &offset, &tag,
2512 &sub)) {
2513 switch (tag) {
2514 case GST_RIFF_TAG_dmlh:{
2515 gst_riff_dmlh dmlh, *_dmlh;
2516 GstMapInfo map;
2517
2518 /* sub == NULL is possible and means an empty buffer */
2519 if (sub == NULL)
2520 goto next;
2521
2522 gst_buffer_map (sub, &map, GST_MAP_READ);
2523
2524 /* check size */
2525 if (map.size < sizeof (gst_riff_dmlh)) {
2526 GST_ERROR_OBJECT (avi,
2527 "DMLH entry is too small (%" G_GSIZE_FORMAT " bytes, %d needed)",
2528 map.size, (int) sizeof (gst_riff_dmlh));
2529 gst_buffer_unmap (sub, &map);
2530 goto next;
2531 }
2532 _dmlh = (gst_riff_dmlh *) map.data;
2533 dmlh.totalframes = GST_READ_UINT32_LE (&_dmlh->totalframes);
2534 gst_buffer_unmap (sub, &map);
2535
2536 GST_INFO_OBJECT (avi, "dmlh tag found: totalframes: %u",
2537 dmlh.totalframes);
2538
2539 avi->avih->tot_frames = dmlh.totalframes;
2540 goto next;
2541 }
2542
2543 default:
2544 GST_WARNING_OBJECT (avi,
2545 "Unknown tag %" GST_FOURCC_FORMAT " in ODML header",
2546 GST_FOURCC_ARGS (tag));
2547 /* Only get buffer for debugging if the memdump is needed */
2548 if (gst_debug_category_get_threshold (GST_CAT_DEFAULT) >= 9) {
2549 GstMapInfo map;
2550
2551 gst_buffer_map (sub, &map, GST_MAP_READ);
2552 GST_MEMDUMP_OBJECT (avi, "Unknown ODML tag", map.data, map.size);
2553 gst_buffer_unmap (sub, &map);
2554 }
2555 /* fall-through */
2556 case GST_RIFF_TAG_JUNQ:
2557 case GST_RIFF_TAG_JUNK:
2558 next:
2559 /* skip and move to next chunk */
2560 if (sub) {
2561 gst_buffer_unref (sub);
2562 sub = NULL;
2563 }
2564 break;
2565 }
2566 }
2567 if (buf)
2568 gst_buffer_unref (buf);
2569 }
2570
2571 /* Index helper */
2572 static guint
gst_avi_demux_index_last(GstAviDemux * avi,GstAviStream * stream)2573 gst_avi_demux_index_last (GstAviDemux * avi, GstAviStream * stream)
2574 {
2575 return stream->idx_n;
2576 }
2577
2578 /* find a previous entry in the index with the given flags */
2579 static guint
gst_avi_demux_index_prev(GstAviDemux * avi,GstAviStream * stream,guint last,gboolean keyframe)2580 gst_avi_demux_index_prev (GstAviDemux * avi, GstAviStream * stream,
2581 guint last, gboolean keyframe)
2582 {
2583 GstAviIndexEntry *entry;
2584 guint i;
2585
2586 for (i = last; i > 0; i--) {
2587 entry = &stream->index[i - 1];
2588 if (!keyframe || ENTRY_IS_KEYFRAME (entry)) {
2589 return i - 1;
2590 }
2591 }
2592 return 0;
2593 }
2594
2595 static guint
gst_avi_demux_index_next(GstAviDemux * avi,GstAviStream * stream,guint last,gboolean keyframe)2596 gst_avi_demux_index_next (GstAviDemux * avi, GstAviStream * stream,
2597 guint last, gboolean keyframe)
2598 {
2599 GstAviIndexEntry *entry;
2600 gint i;
2601
2602 for (i = last + 1; i < stream->idx_n; i++) {
2603 entry = &stream->index[i];
2604 if (!keyframe || ENTRY_IS_KEYFRAME (entry)) {
2605 return i;
2606 }
2607 }
2608 return stream->idx_n - 1;
2609 }
2610
2611 static guint
gst_avi_demux_index_entry_search(GstAviIndexEntry * entry,guint64 * total)2612 gst_avi_demux_index_entry_search (GstAviIndexEntry * entry, guint64 * total)
2613 {
2614 if (entry->total < *total)
2615 return -1;
2616 else if (entry->total > *total)
2617 return 1;
2618 return 0;
2619 }
2620
2621 /*
2622 * gst_avi_demux_index_for_time:
2623 * @avi: Avi object
2624 * @stream: the stream
2625 * @time: a time position
2626 * @next: whether to look for entry before or after @time
2627 *
2628 * Finds the index entry which time is less/more or equal than the requested time.
2629 * Try to avoid binary search when we can convert the time to an index
2630 * position directly (for example for video frames with a fixed duration).
2631 *
2632 * Returns: the found position in the index.
2633 */
2634 static guint
gst_avi_demux_index_for_time(GstAviDemux * avi,GstAviStream * stream,guint64 time,gboolean next)2635 gst_avi_demux_index_for_time (GstAviDemux * avi,
2636 GstAviStream * stream, guint64 time, gboolean next)
2637 {
2638 guint index = -1;
2639 guint64 total;
2640
2641 GST_LOG_OBJECT (avi, "search time:%" GST_TIME_FORMAT, GST_TIME_ARGS (time));
2642
2643 /* easy (and common) cases */
2644 if (time == 0 || stream->idx_n == 0)
2645 return 0;
2646 if (time >= stream->idx_duration)
2647 return stream->idx_n - 1;
2648
2649 /* figure out where we need to go. For that we convert the time to an
2650 * index entry or we convert it to a total and then do a binary search. */
2651 if (stream->is_vbr) {
2652 /* VBR stream next timestamp */
2653 if (stream->strh->type == GST_RIFF_FCC_auds) {
2654 total = avi_stream_convert_time_to_frames_unchecked (stream, time);
2655 } else {
2656 index = avi_stream_convert_time_to_frames_unchecked (stream, time);
2657 /* this entry typically undershoots the target time,
2658 * so check a bit more if next needed */
2659 if (next && index != -1) {
2660 GstClockTime itime =
2661 avi_stream_convert_frames_to_time_unchecked (stream, index);
2662 if (itime < time && index + 1 < stream->idx_n)
2663 index++;
2664 }
2665 }
2666 } else if (stream->strh->type == GST_RIFF_FCC_auds) {
2667 /* constant rate stream */
2668 total = avi_stream_convert_time_to_bytes_unchecked (stream, time);
2669 } else
2670 return -1;
2671
2672 if (index == -1) {
2673 GstAviIndexEntry *entry;
2674
2675 /* no index, find index with binary search on total */
2676 GST_LOG_OBJECT (avi, "binary search for entry with total %"
2677 G_GUINT64_FORMAT, total);
2678
2679 entry = gst_util_array_binary_search (stream->index,
2680 stream->idx_n, sizeof (GstAviIndexEntry),
2681 (GCompareDataFunc) gst_avi_demux_index_entry_search,
2682 next ? GST_SEARCH_MODE_AFTER : GST_SEARCH_MODE_BEFORE, &total, NULL);
2683
2684 if (entry == NULL) {
2685 GST_LOG_OBJECT (avi, "not found, assume index 0");
2686 index = 0;
2687 } else {
2688 index = entry - stream->index;
2689 GST_LOG_OBJECT (avi, "found at %u", index);
2690 }
2691 } else {
2692 GST_LOG_OBJECT (avi, "converted time to index %u", index);
2693 }
2694
2695 return index;
2696 }
2697
2698 static inline GstAviStream *
gst_avi_demux_stream_for_id(GstAviDemux * avi,guint32 id)2699 gst_avi_demux_stream_for_id (GstAviDemux * avi, guint32 id)
2700 {
2701 guint stream_nr;
2702 GstAviStream *stream;
2703
2704 /* get the stream for this entry */
2705 stream_nr = CHUNKID_TO_STREAMNR (id);
2706 if (G_UNLIKELY (stream_nr >= avi->num_streams)) {
2707 GST_WARNING_OBJECT (avi,
2708 "invalid stream nr %d (0x%08x, %" GST_FOURCC_FORMAT ")", stream_nr, id,
2709 GST_FOURCC_ARGS (id));
2710 return NULL;
2711 }
2712 stream = &avi->stream[stream_nr];
2713 if (G_UNLIKELY (!stream->strh)) {
2714 GST_WARNING_OBJECT (avi, "Unhandled stream %d, skipping", stream_nr);
2715 return NULL;
2716 }
2717 return stream;
2718 }
2719
2720 /*
2721 * gst_avi_demux_parse_index:
2722 * @avi: calling element (used for debugging/errors).
2723 * @buf: buffer containing the full index.
2724 *
2725 * Read index entries from the provided buffer.
2726 * The buffer should contain a GST_RIFF_TAG_idx1 chunk.
2727 */
2728 static gboolean
gst_avi_demux_parse_index(GstAviDemux * avi,GstBuffer * buf)2729 gst_avi_demux_parse_index (GstAviDemux * avi, GstBuffer * buf)
2730 {
2731 GstMapInfo map;
2732 guint i, num, n;
2733 gst_riff_index_entry *index;
2734 GstClockTime stamp;
2735 GstAviStream *stream;
2736 GstAviIndexEntry entry;
2737 guint32 id;
2738
2739 if (!buf)
2740 return FALSE;
2741
2742 gst_buffer_map (buf, &map, GST_MAP_READ);
2743
2744 stamp = gst_util_get_timestamp ();
2745
2746 /* see how many items in the index */
2747 num = map.size / sizeof (gst_riff_index_entry);
2748 if (num == 0)
2749 goto empty_list;
2750
2751 GST_INFO_OBJECT (avi, "Parsing index, nr_entries = %6d", num);
2752
2753 index = (gst_riff_index_entry *) map.data;
2754
2755 /* figure out if the index is 0 based or relative to the MOVI start */
2756 entry.offset = GST_READ_UINT32_LE (&index[0].offset);
2757 if (entry.offset < avi->offset) {
2758 avi->index_offset = avi->offset + 8;
2759 GST_DEBUG ("index_offset = %" G_GUINT64_FORMAT, avi->index_offset);
2760 } else {
2761 avi->index_offset = 0;
2762 GST_DEBUG ("index is 0 based");
2763 }
2764
2765 for (i = 0, n = 0; i < num; i++) {
2766 id = GST_READ_UINT32_LE (&index[i].id);
2767 entry.offset = GST_READ_UINT32_LE (&index[i].offset);
2768
2769 /* some sanity checks */
2770 if (G_UNLIKELY (id == GST_RIFF_rec || id == 0 ||
2771 (entry.offset == 0 && n > 0)))
2772 continue;
2773
2774 /* get the stream for this entry */
2775 stream = gst_avi_demux_stream_for_id (avi, id);
2776 if (G_UNLIKELY (!stream))
2777 continue;
2778
2779 /* handle offset and size */
2780 entry.offset += avi->index_offset + 8;
2781 entry.size = GST_READ_UINT32_LE (&index[i].size);
2782
2783 /* handle flags */
2784 if (stream->strh->type == GST_RIFF_FCC_auds) {
2785 /* all audio frames are keyframes */
2786 ENTRY_SET_KEYFRAME (&entry);
2787 } else if (stream->strh->type == GST_RIFF_FCC_vids &&
2788 stream->strf.vids->compression == GST_RIFF_DXSB) {
2789 /* all xsub frames are keyframes */
2790 ENTRY_SET_KEYFRAME (&entry);
2791 } else {
2792 guint32 flags;
2793 /* else read flags */
2794 flags = GST_READ_UINT32_LE (&index[i].flags);
2795 if (flags & GST_RIFF_IF_KEYFRAME) {
2796 ENTRY_SET_KEYFRAME (&entry);
2797 } else {
2798 ENTRY_UNSET_KEYFRAME (&entry);
2799 }
2800 }
2801
2802 /* and add */
2803 if (G_UNLIKELY (!gst_avi_demux_add_index (avi, stream, num, &entry)))
2804 goto out_of_mem;
2805
2806 n++;
2807 }
2808 gst_buffer_unmap (buf, &map);
2809 gst_buffer_unref (buf);
2810
2811 /* get stream stats now */
2812 avi->have_index = gst_avi_demux_do_index_stats (avi);
2813
2814 stamp = gst_util_get_timestamp () - stamp;
2815 GST_DEBUG_OBJECT (avi, "index parsing took %" GST_TIME_FORMAT,
2816 GST_TIME_ARGS (stamp));
2817
2818 return TRUE;
2819
2820 /* ERRORS */
2821 empty_list:
2822 {
2823 GST_DEBUG_OBJECT (avi, "empty index");
2824 gst_buffer_unmap (buf, &map);
2825 gst_buffer_unref (buf);
2826 return FALSE;
2827 }
2828 out_of_mem:
2829 {
2830 GST_ELEMENT_ERROR (avi, RESOURCE, NO_SPACE_LEFT, (NULL),
2831 ("Cannot allocate memory for %u*%u=%u bytes",
2832 (guint) sizeof (GstAviIndexEntry), num,
2833 (guint) sizeof (GstAviIndexEntry) * num));
2834 gst_buffer_unmap (buf, &map);
2835 gst_buffer_unref (buf);
2836 return FALSE;
2837 }
2838 }
2839
2840 /*
2841 * gst_avi_demux_stream_index:
2842 * @avi: avi demuxer object.
2843 *
2844 * Seeks to index and reads it.
2845 */
2846 static void
gst_avi_demux_stream_index(GstAviDemux * avi)2847 gst_avi_demux_stream_index (GstAviDemux * avi)
2848 {
2849 GstFlowReturn res;
2850 guint64 offset = avi->offset;
2851 GstBuffer *buf = NULL;
2852 guint32 tag;
2853 guint32 size;
2854 GstMapInfo map;
2855
2856 GST_DEBUG ("demux stream index at offset %" G_GUINT64_FORMAT, offset);
2857
2858 /* get chunk information */
2859 res = gst_pad_pull_range (avi->sinkpad, offset, 8, &buf);
2860 if (res != GST_FLOW_OK)
2861 goto pull_failed;
2862
2863 gst_buffer_map (buf, &map, GST_MAP_READ);
2864 if (map.size < 8)
2865 goto too_small;
2866
2867 /* check tag first before blindy trying to read 'size' bytes */
2868 tag = GST_READ_UINT32_LE (map.data);
2869 size = GST_READ_UINT32_LE (map.data + 4);
2870 if (tag == GST_RIFF_TAG_LIST) {
2871 /* this is the movi tag */
2872 GST_DEBUG_OBJECT (avi, "skip LIST chunk, size %" G_GUINT32_FORMAT,
2873 (8 + GST_ROUND_UP_2 (size)));
2874 offset += 8 + GST_ROUND_UP_2 (size);
2875 gst_buffer_unmap (buf, &map);
2876 gst_buffer_unref (buf);
2877
2878 buf = NULL;
2879 res = gst_pad_pull_range (avi->sinkpad, offset, 8, &buf);
2880 if (res != GST_FLOW_OK)
2881 goto pull_failed;
2882
2883 gst_buffer_map (buf, &map, GST_MAP_READ);
2884 if (map.size < 8)
2885 goto too_small;
2886
2887 tag = GST_READ_UINT32_LE (map.data);
2888 size = GST_READ_UINT32_LE (map.data + 4);
2889 }
2890 gst_buffer_unmap (buf, &map);
2891 gst_buffer_unref (buf);
2892
2893 if (tag != GST_RIFF_TAG_idx1)
2894 goto no_index;
2895 if (!size)
2896 goto zero_index;
2897
2898 GST_DEBUG ("index found at offset %" G_GUINT64_FORMAT, offset);
2899
2900 /* read chunk, advance offset */
2901 if (gst_riff_read_chunk (GST_ELEMENT_CAST (avi),
2902 avi->sinkpad, &offset, &tag, &buf) != GST_FLOW_OK)
2903 return;
2904
2905 GST_DEBUG ("will parse index chunk size %" G_GSIZE_FORMAT " for tag %"
2906 GST_FOURCC_FORMAT, gst_buffer_get_size (buf), GST_FOURCC_ARGS (tag));
2907
2908 gst_avi_demux_parse_index (avi, buf);
2909
2910 #ifndef GST_DISABLE_GST_DEBUG
2911 /* debug our indexes */
2912 {
2913 gint i;
2914 GstAviStream *stream;
2915
2916 for (i = 0; i < avi->num_streams; i++) {
2917 stream = &avi->stream[i];
2918 GST_DEBUG_OBJECT (avi, "stream %u: %u frames, %" G_GINT64_FORMAT " bytes",
2919 i, stream->idx_n, stream->total_bytes);
2920 }
2921 }
2922 #endif
2923 return;
2924
2925 /* ERRORS */
2926 pull_failed:
2927 {
2928 GST_DEBUG_OBJECT (avi,
2929 "pull range failed: pos=%" G_GUINT64_FORMAT " size=8", offset);
2930 return;
2931 }
2932 too_small:
2933 {
2934 GST_DEBUG_OBJECT (avi, "Buffer is too small");
2935 gst_buffer_unmap (buf, &map);
2936 gst_buffer_unref (buf);
2937 return;
2938 }
2939 no_index:
2940 {
2941 GST_WARNING_OBJECT (avi,
2942 "No index data (idx1) after movi chunk, but %" GST_FOURCC_FORMAT,
2943 GST_FOURCC_ARGS (tag));
2944 return;
2945 }
2946 zero_index:
2947 {
2948 GST_WARNING_OBJECT (avi, "Empty index data (idx1) after movi chunk");
2949 return;
2950 }
2951 }
2952
2953 /*
2954 * gst_avi_demux_stream_index_push:
2955 * @avi: avi demuxer object.
2956 *
2957 * Read index.
2958 */
2959 static void
gst_avi_demux_stream_index_push(GstAviDemux * avi)2960 gst_avi_demux_stream_index_push (GstAviDemux * avi)
2961 {
2962 guint64 offset = avi->idx1_offset;
2963 GstBuffer *buf;
2964 guint32 tag;
2965 guint32 size;
2966
2967 GST_DEBUG ("demux stream index at offset %" G_GUINT64_FORMAT, offset);
2968
2969 /* get chunk information */
2970 if (!gst_avi_demux_peek_chunk (avi, &tag, &size))
2971 return;
2972
2973 /* check tag first before blindly trying to read 'size' bytes */
2974 if (tag == GST_RIFF_TAG_LIST) {
2975 /* this is the movi tag */
2976 GST_DEBUG_OBJECT (avi, "skip LIST chunk, size %" G_GUINT32_FORMAT,
2977 (8 + GST_ROUND_UP_2 (size)));
2978 avi->idx1_offset = offset + 8 + GST_ROUND_UP_2 (size);
2979 /* issue seek to allow chain function to handle it and return! */
2980 perform_seek_to_offset (avi, avi->idx1_offset, avi->segment_seqnum);
2981 return;
2982 }
2983
2984 if (tag != GST_RIFF_TAG_idx1)
2985 goto no_index;
2986
2987 GST_DEBUG ("index found at offset %" G_GUINT64_FORMAT, offset);
2988
2989 /* flush chunk header */
2990 gst_adapter_flush (avi->adapter, 8);
2991 /* read chunk payload */
2992 buf = gst_adapter_take_buffer (avi->adapter, size);
2993 if (!buf)
2994 goto pull_failed;
2995 /* advance offset */
2996 offset += 8 + GST_ROUND_UP_2 (size);
2997
2998 GST_DEBUG ("will parse index chunk size %" G_GSIZE_FORMAT " for tag %"
2999 GST_FOURCC_FORMAT, gst_buffer_get_size (buf), GST_FOURCC_ARGS (tag));
3000
3001 avi->offset = avi->first_movi_offset;
3002 gst_avi_demux_parse_index (avi, buf);
3003
3004 #ifndef GST_DISABLE_GST_DEBUG
3005 /* debug our indexes */
3006 {
3007 gint i;
3008 GstAviStream *stream;
3009
3010 for (i = 0; i < avi->num_streams; i++) {
3011 stream = &avi->stream[i];
3012 GST_DEBUG_OBJECT (avi, "stream %u: %u frames, %" G_GINT64_FORMAT " bytes",
3013 i, stream->idx_n, stream->total_bytes);
3014 }
3015 }
3016 #endif
3017 return;
3018
3019 /* ERRORS */
3020 pull_failed:
3021 {
3022 GST_DEBUG_OBJECT (avi,
3023 "taking data from adapter failed: pos=%" G_GUINT64_FORMAT " size=%u",
3024 offset, size);
3025 return;
3026 }
3027 no_index:
3028 {
3029 GST_WARNING_OBJECT (avi,
3030 "No index data (idx1) after movi chunk, but %" GST_FOURCC_FORMAT,
3031 GST_FOURCC_ARGS (tag));
3032 return;
3033 }
3034 }
3035
3036 /*
3037 * gst_avi_demux_peek_tag:
3038 *
3039 * Returns the tag and size of the next chunk
3040 */
3041 static GstFlowReturn
gst_avi_demux_peek_tag(GstAviDemux * avi,guint64 offset,guint32 * tag,guint * size)3042 gst_avi_demux_peek_tag (GstAviDemux * avi, guint64 offset, guint32 * tag,
3043 guint * size)
3044 {
3045 GstFlowReturn res;
3046 GstBuffer *buf = NULL;
3047 GstMapInfo map;
3048
3049 res = gst_pad_pull_range (avi->sinkpad, offset, 8, &buf);
3050 if (res != GST_FLOW_OK)
3051 goto pull_failed;
3052
3053 gst_buffer_map (buf, &map, GST_MAP_READ);
3054 if (map.size != 8)
3055 goto wrong_size;
3056
3057 *tag = GST_READ_UINT32_LE (map.data);
3058 *size = GST_READ_UINT32_LE (map.data + 4);
3059
3060 GST_LOG_OBJECT (avi, "Tag[%" GST_FOURCC_FORMAT "] (size:%d) %"
3061 G_GINT64_FORMAT " -- %" G_GINT64_FORMAT, GST_FOURCC_ARGS (*tag),
3062 *size, offset + 8, offset + 8 + (gint64) * size);
3063
3064 done:
3065 gst_buffer_unmap (buf, &map);
3066 gst_buffer_unref (buf);
3067
3068 return res;
3069
3070 /* ERRORS */
3071 pull_failed:
3072 {
3073 GST_DEBUG_OBJECT (avi, "pull_ranged returned %s", gst_flow_get_name (res));
3074 return res;
3075 }
3076 wrong_size:
3077 {
3078 GST_DEBUG_OBJECT (avi, "got %" G_GSIZE_FORMAT " bytes which is <> 8 bytes",
3079 map.size);
3080 res = GST_FLOW_ERROR;
3081 goto done;
3082 }
3083 }
3084
3085 /*
3086 * gst_avi_demux_next_data_buffer:
3087 *
3088 * Returns the offset and size of the next buffer
3089 * Position is the position of the buffer (after tag and size)
3090 */
3091 static GstFlowReturn
gst_avi_demux_next_data_buffer(GstAviDemux * avi,guint64 * offset,guint32 * tag,guint * size)3092 gst_avi_demux_next_data_buffer (GstAviDemux * avi, guint64 * offset,
3093 guint32 * tag, guint * size)
3094 {
3095 guint64 off = *offset;
3096 guint _size = 0;
3097 GstFlowReturn res;
3098
3099 do {
3100 res = gst_avi_demux_peek_tag (avi, off, tag, &_size);
3101 if (res != GST_FLOW_OK)
3102 break;
3103 if (*tag == GST_RIFF_TAG_LIST || *tag == GST_RIFF_TAG_RIFF)
3104 off += 8 + 4; /* skip tag + size + subtag */
3105 else {
3106 *offset = off + 8;
3107 *size = _size;
3108 break;
3109 }
3110 } while (TRUE);
3111
3112 return res;
3113 }
3114
3115 /*
3116 * gst_avi_demux_stream_scan:
3117 * @avi: calling element (used for debugging/errors).
3118 *
3119 * Scan the file for all chunks to "create" a new index.
3120 * pull-range based
3121 */
3122 static gboolean
gst_avi_demux_stream_scan(GstAviDemux * avi)3123 gst_avi_demux_stream_scan (GstAviDemux * avi)
3124 {
3125 GstFlowReturn res;
3126 GstAviStream *stream;
3127 guint64 pos = 0;
3128 guint64 length;
3129 gint64 tmplength;
3130 guint32 tag = 0;
3131 guint num;
3132
3133 /* FIXME:
3134 * - implement non-seekable source support.
3135 */
3136 GST_DEBUG_OBJECT (avi, "Creating index");
3137
3138 /* get the size of the file */
3139 if (!gst_pad_peer_query_duration (avi->sinkpad, GST_FORMAT_BYTES, &tmplength))
3140 return FALSE;
3141 length = tmplength;
3142
3143 /* guess the total amount of entries we expect */
3144 num = 16000;
3145
3146 while (TRUE) {
3147 GstAviIndexEntry entry;
3148 guint size = 0;
3149
3150 /* start reading data buffers to find the id and offset */
3151 res = gst_avi_demux_next_data_buffer (avi, &pos, &tag, &size);
3152 if (G_UNLIKELY (res != GST_FLOW_OK))
3153 break;
3154
3155 /* get stream */
3156 stream = gst_avi_demux_stream_for_id (avi, tag);
3157 if (G_UNLIKELY (!stream))
3158 goto next;
3159
3160 /* we can't figure out the keyframes, assume they all are */
3161 entry.flags = GST_AVI_KEYFRAME;
3162 entry.offset = pos;
3163 entry.size = size;
3164
3165 /* and add to the index of this stream */
3166 if (G_UNLIKELY (!gst_avi_demux_add_index (avi, stream, num, &entry)))
3167 goto out_of_mem;
3168
3169 next:
3170 /* update position */
3171 pos += GST_ROUND_UP_2 (size);
3172 if (G_UNLIKELY (pos > length)) {
3173 GST_WARNING_OBJECT (avi,
3174 "Stopping index lookup since we are further than EOF");
3175 break;
3176 }
3177 }
3178
3179 /* collect stats */
3180 avi->have_index = gst_avi_demux_do_index_stats (avi);
3181
3182 return TRUE;
3183
3184 /* ERRORS */
3185 out_of_mem:
3186 {
3187 GST_ELEMENT_ERROR (avi, RESOURCE, NO_SPACE_LEFT, (NULL),
3188 ("Cannot allocate memory for %u*%u=%u bytes",
3189 (guint) sizeof (GstAviIndexEntry), num,
3190 (guint) sizeof (GstAviIndexEntry) * num));
3191 return FALSE;
3192 }
3193 }
3194
3195 static void
gst_avi_demux_calculate_durations_from_index(GstAviDemux * avi)3196 gst_avi_demux_calculate_durations_from_index (GstAviDemux * avi)
3197 {
3198 guint i;
3199 GstClockTime total;
3200 GstAviStream *stream;
3201
3202 total = GST_CLOCK_TIME_NONE;
3203
3204 /* all streams start at a timestamp 0 */
3205 for (i = 0; i < avi->num_streams; i++) {
3206 GstClockTime duration, hduration;
3207 gst_riff_strh *strh;
3208
3209 stream = &avi->stream[i];
3210 if (G_UNLIKELY (!stream || !stream->idx_n || !(strh = stream->strh)))
3211 continue;
3212
3213 /* get header duration for the stream */
3214 hduration = stream->hdr_duration;
3215 /* index duration calculated during parsing */
3216 duration = stream->idx_duration;
3217
3218 /* now pick a good duration */
3219 if (GST_CLOCK_TIME_IS_VALID (duration)) {
3220 /* index gave valid duration, use that */
3221 GST_INFO ("Stream %p duration according to index: %" GST_TIME_FORMAT,
3222 stream, GST_TIME_ARGS (duration));
3223 } else {
3224 /* fall back to header info to calculate a duration */
3225 duration = hduration;
3226 }
3227 GST_INFO ("Setting duration of stream #%d to %" GST_TIME_FORMAT,
3228 i, GST_TIME_ARGS (duration));
3229 /* set duration for the stream */
3230 stream->duration = duration;
3231
3232 /* find total duration */
3233 if (total == GST_CLOCK_TIME_NONE ||
3234 (GST_CLOCK_TIME_IS_VALID (duration) && duration > total))
3235 total = duration;
3236 }
3237
3238 if (GST_CLOCK_TIME_IS_VALID (total) && (total > 0)) {
3239 /* now update the duration for those streams where we had none */
3240 for (i = 0; i < avi->num_streams; i++) {
3241 stream = &avi->stream[i];
3242
3243 if (!GST_CLOCK_TIME_IS_VALID (stream->duration)
3244 || stream->duration == 0) {
3245 stream->duration = total;
3246
3247 GST_INFO ("Stream %p duration according to total: %" GST_TIME_FORMAT,
3248 stream, GST_TIME_ARGS (total));
3249 }
3250 }
3251 }
3252
3253 /* and set the total duration in the segment. */
3254 GST_INFO ("Setting total duration to: %" GST_TIME_FORMAT,
3255 GST_TIME_ARGS (total));
3256
3257 avi->segment.duration = total;
3258 }
3259
3260 /* returns FALSE if there are no pads to deliver event to,
3261 * otherwise TRUE (whatever the outcome of event sending),
3262 * takes ownership of the event. */
3263 static gboolean
gst_avi_demux_push_event(GstAviDemux * avi,GstEvent * event)3264 gst_avi_demux_push_event (GstAviDemux * avi, GstEvent * event)
3265 {
3266 gboolean result = FALSE;
3267 gint i;
3268
3269 GST_DEBUG_OBJECT (avi, "sending %s event to %d streams",
3270 GST_EVENT_TYPE_NAME (event), avi->num_streams);
3271
3272 for (i = 0; i < avi->num_streams; i++) {
3273 GstAviStream *stream = &avi->stream[i];
3274
3275 if (stream->pad) {
3276 result = TRUE;
3277 gst_pad_push_event (stream->pad, gst_event_ref (event));
3278 }
3279 }
3280 gst_event_unref (event);
3281 return result;
3282 }
3283
3284 static void
gst_avi_demux_check_seekability(GstAviDemux * avi)3285 gst_avi_demux_check_seekability (GstAviDemux * avi)
3286 {
3287 GstQuery *query;
3288 gboolean seekable = FALSE;
3289 gint64 start = -1, stop = -1;
3290
3291 query = gst_query_new_seeking (GST_FORMAT_BYTES);
3292 if (!gst_pad_peer_query (avi->sinkpad, query)) {
3293 GST_DEBUG_OBJECT (avi, "seeking query failed");
3294 goto done;
3295 }
3296
3297 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
3298
3299 /* try harder to query upstream size if we didn't get it the first time */
3300 if (seekable && stop == -1) {
3301 GST_DEBUG_OBJECT (avi, "doing duration query to fix up unset stop");
3302 gst_pad_peer_query_duration (avi->sinkpad, GST_FORMAT_BYTES, &stop);
3303 }
3304
3305 /* if upstream doesn't know the size, it's likely that it's not seekable in
3306 * practice even if it technically may be seekable */
3307 if (seekable && (start != 0 || stop <= start)) {
3308 GST_DEBUG_OBJECT (avi, "seekable but unknown start/stop -> disable");
3309 seekable = FALSE;
3310 }
3311
3312 done:
3313 GST_INFO_OBJECT (avi, "seekable: %d (%" G_GUINT64_FORMAT " - %"
3314 G_GUINT64_FORMAT ")", seekable, start, stop);
3315 avi->seekable = seekable;
3316
3317 gst_query_unref (query);
3318 }
3319
3320 /*
3321 * Read AVI headers when streaming
3322 */
3323 static GstFlowReturn
gst_avi_demux_stream_header_push(GstAviDemux * avi)3324 gst_avi_demux_stream_header_push (GstAviDemux * avi)
3325 {
3326 GstFlowReturn ret = GST_FLOW_OK;
3327 guint32 tag = 0;
3328 guint32 ltag = 0;
3329 guint32 size = 0;
3330 const guint8 *data;
3331 GstBuffer *buf = NULL, *sub = NULL;
3332 guint offset = 4;
3333 gint i;
3334 GstTagList *tags = NULL;
3335 guint8 fourcc[4];
3336
3337 GST_DEBUG ("Reading and parsing avi headers: %d", avi->header_state);
3338
3339 switch (avi->header_state) {
3340 case GST_AVI_DEMUX_HEADER_TAG_LIST:
3341 again:
3342 if (gst_avi_demux_peek_chunk (avi, &tag, &size)) {
3343 avi->offset += 8 + GST_ROUND_UP_2 (size);
3344 if (tag != GST_RIFF_TAG_LIST)
3345 goto header_no_list;
3346
3347 gst_adapter_flush (avi->adapter, 8);
3348 /* Find the 'hdrl' LIST tag */
3349 GST_DEBUG ("Reading %d bytes", size);
3350 buf = gst_adapter_take_buffer (avi->adapter, size);
3351
3352 gst_buffer_extract (buf, 0, fourcc, 4);
3353
3354 if (GST_READ_UINT32_LE (fourcc) != GST_RIFF_LIST_hdrl) {
3355 GST_WARNING_OBJECT (avi, "Invalid AVI header (no hdrl at start): %"
3356 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag));
3357 gst_buffer_unref (buf);
3358 goto again;
3359 }
3360
3361 /* mind padding */
3362 if (size & 1)
3363 gst_adapter_flush (avi->adapter, 1);
3364
3365 GST_DEBUG ("'hdrl' LIST tag found. Parsing next chunk");
3366
3367 gst_avi_demux_roundup_list (avi, &buf);
3368
3369 /* the hdrl starts with a 'avih' header */
3370 if (!gst_riff_parse_chunk (GST_ELEMENT_CAST (avi), buf, &offset, &tag,
3371 &sub))
3372 goto header_no_avih;
3373
3374 if (tag != GST_RIFF_TAG_avih)
3375 goto header_no_avih;
3376
3377 if (!gst_avi_demux_parse_avih (avi, sub, &avi->avih))
3378 goto header_wrong_avih;
3379
3380 GST_DEBUG_OBJECT (avi, "AVI header ok, reading elemnts from header");
3381
3382 /* now, read the elements from the header until the end */
3383 while (gst_riff_parse_chunk (GST_ELEMENT_CAST (avi), buf, &offset, &tag,
3384 &sub)) {
3385 /* sub can be NULL on empty tags */
3386 if (!sub)
3387 continue;
3388
3389 switch (tag) {
3390 case GST_RIFF_TAG_LIST:
3391 if (gst_buffer_get_size (sub) < 4)
3392 goto next;
3393
3394 gst_buffer_extract (sub, 0, fourcc, 4);
3395
3396 switch (GST_READ_UINT32_LE (fourcc)) {
3397 case GST_RIFF_LIST_strl:
3398 if (!(gst_avi_demux_parse_stream (avi, sub))) {
3399 sub = NULL;
3400 GST_ELEMENT_WARNING (avi, STREAM, DEMUX, (NULL),
3401 ("failed to parse stream, ignoring"));
3402 goto next;
3403 }
3404 sub = NULL;
3405 goto next;
3406 case GST_RIFF_LIST_odml:
3407 gst_avi_demux_parse_odml (avi, sub);
3408 sub = NULL;
3409 break;
3410 default:
3411 GST_WARNING_OBJECT (avi,
3412 "Unknown list %" GST_FOURCC_FORMAT " in AVI header",
3413 GST_FOURCC_ARGS (GST_READ_UINT32_LE (fourcc)));
3414 /* fall-through */
3415 case GST_RIFF_TAG_JUNQ:
3416 case GST_RIFF_TAG_JUNK:
3417 goto next;
3418 }
3419 break;
3420 case GST_RIFF_IDIT:
3421 gst_avi_demux_parse_idit (avi, sub);
3422 goto next;
3423 default:
3424 GST_WARNING_OBJECT (avi,
3425 "Unknown tag %" GST_FOURCC_FORMAT " in AVI header",
3426 GST_FOURCC_ARGS (tag));
3427 /* Only get buffer for debugging if the memdump is needed */
3428 if (gst_debug_category_get_threshold (GST_CAT_DEFAULT) >= 9) {
3429 GstMapInfo map;
3430
3431 gst_buffer_map (sub, &map, GST_MAP_READ);
3432 GST_MEMDUMP_OBJECT (avi, "Unknown tag", map.data, map.size);
3433 gst_buffer_unmap (sub, &map);
3434 }
3435 /* fall-through */
3436 case GST_RIFF_TAG_JUNQ:
3437 case GST_RIFF_TAG_JUNK:
3438 next:
3439 /* move to next chunk */
3440 if (sub)
3441 gst_buffer_unref (sub);
3442 sub = NULL;
3443 break;
3444 }
3445 }
3446 gst_buffer_unref (buf);
3447 GST_DEBUG ("elements parsed");
3448
3449 /* check parsed streams */
3450 if (avi->num_streams == 0) {
3451 goto no_streams;
3452 } else if (avi->num_streams != avi->avih->streams) {
3453 GST_WARNING_OBJECT (avi,
3454 "Stream header mentioned %d streams, but %d available",
3455 avi->avih->streams, avi->num_streams);
3456 }
3457 GST_DEBUG ("Get junk and info next");
3458 avi->header_state = GST_AVI_DEMUX_HEADER_INFO;
3459 } else {
3460 /* Need more data */
3461 return ret;
3462 }
3463 /* fall-though */
3464 case GST_AVI_DEMUX_HEADER_INFO:
3465 GST_DEBUG_OBJECT (avi, "skipping junk between header and data ...");
3466 while (TRUE) {
3467 if (gst_adapter_available (avi->adapter) < 12)
3468 return GST_FLOW_OK;
3469
3470 data = gst_adapter_map (avi->adapter, 12);
3471 tag = GST_READ_UINT32_LE (data);
3472 size = GST_READ_UINT32_LE (data + 4);
3473 ltag = GST_READ_UINT32_LE (data + 8);
3474 gst_adapter_unmap (avi->adapter);
3475
3476 if (tag == GST_RIFF_TAG_LIST) {
3477 switch (ltag) {
3478 case GST_RIFF_LIST_movi:
3479 gst_adapter_flush (avi->adapter, 12);
3480 if (!avi->first_movi_offset)
3481 avi->first_movi_offset = avi->offset;
3482 avi->offset += 12;
3483 avi->idx1_offset = avi->offset + size - 4;
3484 goto skipping_done;
3485 case GST_RIFF_LIST_INFO:
3486 GST_DEBUG ("Found INFO chunk");
3487 if (gst_avi_demux_peek_chunk (avi, &tag, &size)) {
3488 GST_DEBUG ("got size %d", size);
3489 avi->offset += 12;
3490 gst_adapter_flush (avi->adapter, 12);
3491 if (size > 4) {
3492 buf = gst_adapter_take_buffer (avi->adapter, size - 4);
3493 /* mind padding */
3494 if (size & 1)
3495 gst_adapter_flush (avi->adapter, 1);
3496 gst_riff_parse_info (GST_ELEMENT_CAST (avi), buf, &tags);
3497 if (tags) {
3498 if (avi->globaltags) {
3499 gst_tag_list_insert (avi->globaltags, tags,
3500 GST_TAG_MERGE_REPLACE);
3501 gst_tag_list_unref (tags);
3502 } else {
3503 avi->globaltags = tags;
3504 }
3505 }
3506 tags = NULL;
3507 gst_buffer_unref (buf);
3508
3509 avi->offset += GST_ROUND_UP_2 (size) - 4;
3510 } else {
3511 GST_DEBUG ("skipping INFO LIST prefix");
3512 }
3513 } else {
3514 /* Need more data */
3515 return GST_FLOW_OK;
3516 }
3517 break;
3518 default:
3519 if (gst_avi_demux_peek_chunk (avi, &tag, &size) || size == 0) {
3520 /* accept 0 size buffer here */
3521 avi->abort_buffering = FALSE;
3522 avi->offset += 8 + GST_ROUND_UP_2 (size);
3523 gst_adapter_flush (avi->adapter, 8 + GST_ROUND_UP_2 (size));
3524 } else {
3525 /* Need more data */
3526 return GST_FLOW_OK;
3527 }
3528 break;
3529 }
3530 } else {
3531 if (gst_avi_demux_peek_chunk (avi, &tag, &size) || size == 0) {
3532 /* accept 0 size buffer here */
3533 avi->abort_buffering = FALSE;
3534 avi->offset += 8 + GST_ROUND_UP_2 (size);
3535 gst_adapter_flush (avi->adapter, 8 + GST_ROUND_UP_2 (size));
3536 } else {
3537 /* Need more data */
3538 return GST_FLOW_OK;
3539 }
3540 }
3541 }
3542 break;
3543 default:
3544 GST_WARNING ("unhandled header state: %d", avi->header_state);
3545 break;
3546 }
3547 skipping_done:
3548
3549 GST_DEBUG_OBJECT (avi, "skipping done ... (streams=%u, stream[0].indexes=%p)",
3550 avi->num_streams, avi->stream[0].indexes);
3551
3552 GST_DEBUG ("Found movi chunk. Starting to stream data");
3553 avi->state = GST_AVI_DEMUX_MOVI;
3554
3555 /* no indexes in push mode, but it still sets some variables */
3556 gst_avi_demux_calculate_durations_from_index (avi);
3557
3558 gst_avi_demux_expose_streams (avi, TRUE);
3559
3560 /* prepare all streams for index 0 */
3561 for (i = 0; i < avi->num_streams; i++)
3562 avi->stream[i].current_entry = 0;
3563
3564 /* create initial NEWSEGMENT event */
3565 if (avi->seg_event)
3566 gst_event_unref (avi->seg_event);
3567 avi->seg_event = gst_event_new_segment (&avi->segment);
3568 if (avi->segment_seqnum)
3569 gst_event_set_seqnum (avi->seg_event, avi->segment_seqnum);
3570
3571 gst_avi_demux_check_seekability (avi);
3572
3573 /* at this point we know all the streams and we can signal the no more
3574 * pads signal */
3575 GST_DEBUG_OBJECT (avi, "signaling no more pads");
3576 gst_element_no_more_pads (GST_ELEMENT_CAST (avi));
3577
3578 return GST_FLOW_OK;
3579
3580 /* ERRORS */
3581 no_streams:
3582 {
3583 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("No streams found"));
3584 return GST_FLOW_ERROR;
3585 }
3586 header_no_list:
3587 {
3588 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
3589 ("Invalid AVI header (no LIST at start): %"
3590 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)));
3591 return GST_FLOW_ERROR;
3592 }
3593 header_no_avih:
3594 {
3595 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
3596 ("Invalid AVI header (no avih at start): %"
3597 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)));
3598 if (sub)
3599 gst_buffer_unref (sub);
3600
3601 gst_buffer_unref (buf);
3602 return GST_FLOW_ERROR;
3603 }
3604 header_wrong_avih:
3605 {
3606 gst_buffer_unref (buf);
3607 return GST_FLOW_ERROR;
3608 }
3609 }
3610
3611 static void
gst_avi_demux_add_date_tag(GstAviDemux * avi,gint y,gint m,gint d,gint h,gint min,gint s)3612 gst_avi_demux_add_date_tag (GstAviDemux * avi, gint y, gint m, gint d,
3613 gint h, gint min, gint s)
3614 {
3615 GDate *date;
3616 GstDateTime *dt;
3617
3618 date = g_date_new_dmy (d, m, y);
3619 if (!g_date_valid (date)) {
3620 /* bogus date */
3621 GST_WARNING_OBJECT (avi, "Refusing to add invalid date %d-%d-%d", y, m, d);
3622 g_date_free (date);
3623 return;
3624 }
3625
3626 dt = gst_date_time_new_local_time (y, m, d, h, min, s);
3627
3628 if (avi->globaltags == NULL)
3629 avi->globaltags = gst_tag_list_new_empty ();
3630
3631 gst_tag_list_add (avi->globaltags, GST_TAG_MERGE_REPLACE, GST_TAG_DATE, date,
3632 NULL);
3633 g_date_free (date);
3634 if (dt) {
3635 gst_tag_list_add (avi->globaltags, GST_TAG_MERGE_REPLACE, GST_TAG_DATE_TIME,
3636 dt, NULL);
3637 gst_date_time_unref (dt);
3638 }
3639 }
3640
3641 static void
gst_avi_demux_parse_idit_nums_only(GstAviDemux * avi,gchar * data)3642 gst_avi_demux_parse_idit_nums_only (GstAviDemux * avi, gchar * data)
3643 {
3644 gint y, m, d;
3645 gint hr = 0, min = 0, sec = 0;
3646 gint ret;
3647
3648 GST_DEBUG ("data : '%s'", data);
3649
3650 ret = sscanf (data, "%d:%d:%d %d:%d:%d", &y, &m, &d, &hr, &min, &sec);
3651 if (ret < 3) {
3652 /* Attempt YYYY/MM/DD/ HH:MM variant (found in CASIO cameras) */
3653 ret = sscanf (data, "%04d/%02d/%02d/ %d:%d", &y, &m, &d, &hr, &min);
3654 if (ret < 3) {
3655 GST_WARNING_OBJECT (avi, "Failed to parse IDIT tag");
3656 return;
3657 }
3658 }
3659 gst_avi_demux_add_date_tag (avi, y, m, d, hr, min, sec);
3660 }
3661
3662 static gint
get_month_num(gchar * data,guint size)3663 get_month_num (gchar * data, guint size)
3664 {
3665 if (g_ascii_strncasecmp (data, "jan", 3) == 0) {
3666 return 1;
3667 } else if (g_ascii_strncasecmp (data, "feb", 3) == 0) {
3668 return 2;
3669 } else if (g_ascii_strncasecmp (data, "mar", 3) == 0) {
3670 return 3;
3671 } else if (g_ascii_strncasecmp (data, "apr", 3) == 0) {
3672 return 4;
3673 } else if (g_ascii_strncasecmp (data, "may", 3) == 0) {
3674 return 5;
3675 } else if (g_ascii_strncasecmp (data, "jun", 3) == 0) {
3676 return 6;
3677 } else if (g_ascii_strncasecmp (data, "jul", 3) == 0) {
3678 return 7;
3679 } else if (g_ascii_strncasecmp (data, "aug", 3) == 0) {
3680 return 8;
3681 } else if (g_ascii_strncasecmp (data, "sep", 3) == 0) {
3682 return 9;
3683 } else if (g_ascii_strncasecmp (data, "oct", 3) == 0) {
3684 return 10;
3685 } else if (g_ascii_strncasecmp (data, "nov", 3) == 0) {
3686 return 11;
3687 } else if (g_ascii_strncasecmp (data, "dec", 3) == 0) {
3688 return 12;
3689 }
3690
3691 return 0;
3692 }
3693
3694 static void
gst_avi_demux_parse_idit_text(GstAviDemux * avi,gchar * data)3695 gst_avi_demux_parse_idit_text (GstAviDemux * avi, gchar * data)
3696 {
3697 gint year, month, day;
3698 gint hour, min, sec;
3699 gint ret;
3700 gchar weekday[4];
3701 gchar monthstr[4];
3702
3703 ret = sscanf (data, "%3s %3s %d %d:%d:%d %d", weekday, monthstr, &day, &hour,
3704 &min, &sec, &year);
3705 if (ret != 7) {
3706 GST_WARNING_OBJECT (avi, "Failed to parse IDIT tag");
3707 return;
3708 }
3709 month = get_month_num (monthstr, strlen (monthstr));
3710 gst_avi_demux_add_date_tag (avi, year, month, day, hour, min, sec);
3711 }
3712
3713 static void
gst_avi_demux_parse_idit(GstAviDemux * avi,GstBuffer * buf)3714 gst_avi_demux_parse_idit (GstAviDemux * avi, GstBuffer * buf)
3715 {
3716 GstMapInfo map;
3717 gchar *ptr;
3718 gsize left;
3719 gchar *safedata = NULL;
3720
3721 gst_buffer_map (buf, &map, GST_MAP_READ);
3722 /*
3723 * According to:
3724 * http://www.eden-foundation.org/products/code/film_date_stamp/index.html
3725 *
3726 * This tag could be in one of the below formats
3727 * 2005:08:17 11:42:43
3728 * THU OCT 26 16:46:04 2006
3729 * Mon Mar 3 09:44:56 2008
3730 *
3731 * FIXME: Our date tag doesn't include hours
3732 */
3733
3734 /* skip eventual initial whitespace */
3735 ptr = (gchar *) map.data;
3736 left = map.size;
3737
3738 while (left > 0 && g_ascii_isspace (ptr[0])) {
3739 ptr++;
3740 left--;
3741 }
3742
3743 if (left == 0) {
3744 goto non_parsable;
3745 }
3746
3747 /* make a safe copy to add a \0 to the end of the string */
3748 safedata = g_strndup (ptr, left);
3749
3750 /* test if the first char is a alpha or a number */
3751 if (g_ascii_isdigit (ptr[0])) {
3752 gst_avi_demux_parse_idit_nums_only (avi, safedata);
3753 g_free (safedata);
3754 gst_buffer_unmap (buf, &map);
3755 return;
3756 } else if (g_ascii_isalpha (ptr[0])) {
3757 gst_avi_demux_parse_idit_text (avi, safedata);
3758 g_free (safedata);
3759 gst_buffer_unmap (buf, &map);
3760 return;
3761 }
3762
3763 g_free (safedata);
3764
3765 non_parsable:
3766 GST_WARNING_OBJECT (avi, "IDIT tag has no parsable info");
3767 gst_buffer_unmap (buf, &map);
3768 }
3769
3770 static void
parse_tag_value(GstAviDemux * avi,GstTagList * taglist,const gchar * type,guint8 * ptr,guint tsize)3771 parse_tag_value (GstAviDemux * avi, GstTagList * taglist, const gchar * type,
3772 guint8 * ptr, guint tsize)
3773 {
3774 static const gchar *env_vars[] = { "GST_AVI_TAG_ENCODING",
3775 "GST_RIFF_TAG_ENCODING", "GST_TAG_ENCODING", NULL
3776 };
3777 GType tag_type;
3778 gchar *val;
3779
3780 tag_type = gst_tag_get_type (type);
3781 val = gst_tag_freeform_string_to_utf8 ((gchar *) ptr, tsize, env_vars);
3782
3783 if (val != NULL) {
3784 if (tag_type == G_TYPE_STRING) {
3785 gst_tag_list_add (taglist, GST_TAG_MERGE_APPEND, type, val, NULL);
3786 } else {
3787 GValue tag_val = { 0, };
3788
3789 g_value_init (&tag_val, tag_type);
3790 if (gst_value_deserialize (&tag_val, val)) {
3791 gst_tag_list_add_value (taglist, GST_TAG_MERGE_APPEND, type, &tag_val);
3792 } else {
3793 GST_WARNING_OBJECT (avi, "could not deserialize '%s' into a "
3794 "tag %s of type %s", val, type, g_type_name (tag_type));
3795 }
3796 g_value_unset (&tag_val);
3797 }
3798 g_free (val);
3799 } else {
3800 GST_WARNING_OBJECT (avi, "could not extract %s tag", type);
3801 }
3802 }
3803
3804 static void
gst_avi_demux_parse_strd(GstAviDemux * avi,GstBuffer * buf)3805 gst_avi_demux_parse_strd (GstAviDemux * avi, GstBuffer * buf)
3806 {
3807 GstMapInfo map;
3808 guint32 tag;
3809
3810 gst_buffer_map (buf, &map, GST_MAP_READ);
3811 if (map.size > 4) {
3812 guint8 *ptr = map.data;
3813 gsize left = map.size;
3814
3815 /* parsing based on
3816 * http://www.eden-foundation.org/products/code/film_date_stamp/index.html
3817 */
3818 tag = GST_READ_UINT32_LE (ptr);
3819 if ((tag == GST_MAKE_FOURCC ('A', 'V', 'I', 'F')) && (map.size > 98)) {
3820 gsize sub_size;
3821
3822 ptr += 98;
3823 left -= 98;
3824 if (!memcmp (ptr, "FUJIFILM", 8)) {
3825 GST_MEMDUMP_OBJECT (avi, "fujifim tag", ptr, 48);
3826
3827 ptr += 10;
3828 left -= 10;
3829 sub_size = 0;
3830 while (ptr[sub_size] && sub_size < left)
3831 sub_size++;
3832
3833 if (avi->globaltags == NULL)
3834 avi->globaltags = gst_tag_list_new_empty ();
3835
3836 gst_tag_list_add (avi->globaltags, GST_TAG_MERGE_APPEND,
3837 GST_TAG_DEVICE_MANUFACTURER, "FUJIFILM", NULL);
3838 parse_tag_value (avi, avi->globaltags, GST_TAG_DEVICE_MODEL, ptr,
3839 sub_size);
3840
3841 while (ptr[sub_size] == '\0' && sub_size < left)
3842 sub_size++;
3843
3844 ptr += sub_size;
3845 left -= sub_size;
3846 sub_size = 0;
3847 while (ptr[sub_size] && sub_size < left)
3848 sub_size++;
3849 if (ptr[4] == ':')
3850 ptr[4] = '-';
3851 if (ptr[7] == ':')
3852 ptr[7] = '-';
3853
3854 parse_tag_value (avi, avi->globaltags, GST_TAG_DATE_TIME, ptr,
3855 sub_size);
3856 }
3857 }
3858 }
3859 gst_buffer_unmap (buf, &map);
3860 }
3861
3862 /*
3863 * gst_avi_demux_parse_ncdt:
3864 * @element: caller element (used for debugging/error).
3865 * @buf: input data to be used for parsing, stripped from header.
3866 * @taglist: a pointer to a taglist (returned by this function)
3867 * containing information about this stream. May be
3868 * NULL if no supported tags were found.
3869 *
3870 * Parses Nikon metadata from input data.
3871 */
3872 static void
gst_avi_demux_parse_ncdt(GstAviDemux * avi,GstBuffer * buf,GstTagList ** _taglist)3873 gst_avi_demux_parse_ncdt (GstAviDemux * avi, GstBuffer * buf,
3874 GstTagList ** _taglist)
3875 {
3876 GstMapInfo info;
3877 guint8 *ptr;
3878 gsize left;
3879 guint tsize;
3880 guint32 tag;
3881 const gchar *type;
3882 GstTagList *taglist;
3883
3884 g_return_if_fail (_taglist != NULL);
3885
3886 if (!buf) {
3887 *_taglist = NULL;
3888 return;
3889 }
3890 gst_buffer_map (buf, &info, GST_MAP_READ);
3891
3892 taglist = gst_tag_list_new_empty ();
3893
3894 ptr = info.data;
3895 left = info.size;
3896
3897 while (left > 8) {
3898 tag = GST_READ_UINT32_LE (ptr);
3899 tsize = GST_READ_UINT32_LE (ptr + 4);
3900
3901 GST_MEMDUMP_OBJECT (avi, "tag chunk", ptr, MIN (tsize + 8, left));
3902
3903 left -= 8;
3904 ptr += 8;
3905
3906 GST_DEBUG_OBJECT (avi, "tag %" GST_FOURCC_FORMAT ", size %u",
3907 GST_FOURCC_ARGS (tag), tsize);
3908
3909 if (tsize > left) {
3910 GST_WARNING_OBJECT (avi,
3911 "Tagsize %d is larger than available data %" G_GSIZE_FORMAT,
3912 tsize, left);
3913 tsize = left;
3914 }
3915
3916 /* find out the type of metadata */
3917 switch (tag) {
3918 case GST_RIFF_LIST_nctg:
3919 while (tsize > 4) {
3920 guint16 sub_tag = GST_READ_UINT16_LE (ptr);
3921 guint16 sub_size = GST_READ_UINT16_LE (ptr + 2);
3922
3923 tsize -= 4;
3924 ptr += 4;
3925 left -= 4;
3926
3927 if (sub_size > tsize)
3928 break;
3929
3930 GST_DEBUG_OBJECT (avi, "sub-tag %u, size %u", sub_tag, sub_size);
3931 /* http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Nikon.html#NCTG
3932 * for some reason the sub_tag has a +2 offset
3933 */
3934 switch (sub_tag) {
3935 case 0x03: /* Make */
3936 type = GST_TAG_DEVICE_MANUFACTURER;
3937 break;
3938 case 0x04: /* Model */
3939 type = GST_TAG_DEVICE_MODEL;
3940 break;
3941 /* TODO: 0x05: is software version, like V1.0 */
3942 case 0x06: /* Software */
3943 type = GST_TAG_ENCODER;
3944 break;
3945 case 0x13: /* CreationDate */
3946 type = GST_TAG_DATE_TIME;
3947 if (left > 7) {
3948 if (ptr[4] == ':')
3949 ptr[4] = '-';
3950 if (ptr[7] == ':')
3951 ptr[7] = '-';
3952 }
3953 break;
3954 default:
3955 type = NULL;
3956 break;
3957 }
3958 if (type != NULL && ptr[0] != '\0') {
3959 GST_DEBUG_OBJECT (avi, "mapped tag %u to tag %s", sub_tag, type);
3960
3961 parse_tag_value (avi, taglist, type, ptr, sub_size);
3962 }
3963
3964 ptr += sub_size;
3965 tsize -= sub_size;
3966 left -= sub_size;
3967 }
3968 break;
3969 default:
3970 type = NULL;
3971 GST_WARNING_OBJECT (avi,
3972 "Unknown ncdt (metadata) tag entry %" GST_FOURCC_FORMAT,
3973 GST_FOURCC_ARGS (tag));
3974 GST_MEMDUMP_OBJECT (avi, "Unknown ncdt", ptr, tsize);
3975 break;
3976 }
3977
3978 if (tsize & 1) {
3979 tsize++;
3980 if (tsize > left)
3981 tsize = left;
3982 }
3983
3984 ptr += tsize;
3985 left -= tsize;
3986 }
3987
3988 if (!gst_tag_list_is_empty (taglist)) {
3989 GST_INFO_OBJECT (avi, "extracted tags: %" GST_PTR_FORMAT, taglist);
3990 *_taglist = taglist;
3991 } else {
3992 *_taglist = NULL;
3993 gst_tag_list_unref (taglist);
3994 }
3995 gst_buffer_unmap (buf, &info);
3996
3997 return;
3998 }
3999
4000 /*
4001 * Read full AVI headers.
4002 */
4003 static GstFlowReturn
gst_avi_demux_stream_header_pull(GstAviDemux * avi)4004 gst_avi_demux_stream_header_pull (GstAviDemux * avi)
4005 {
4006 GstFlowReturn res;
4007 GstBuffer *buf, *sub = NULL;
4008 guint32 tag;
4009 guint offset = 4;
4010 GstElement *element = GST_ELEMENT_CAST (avi);
4011 GstClockTime stamp;
4012 GstTagList *tags = NULL;
4013 guint8 fourcc[4];
4014
4015 stamp = gst_util_get_timestamp ();
4016
4017 /* the header consists of a 'hdrl' LIST tag */
4018 res = gst_riff_read_chunk (element, avi->sinkpad, &avi->offset, &tag, &buf);
4019 if (res != GST_FLOW_OK)
4020 goto pull_range_failed;
4021 else if (tag != GST_RIFF_TAG_LIST)
4022 goto no_list;
4023 else if (gst_buffer_get_size (buf) < 4)
4024 goto no_header;
4025
4026 GST_DEBUG_OBJECT (avi, "parsing headers");
4027
4028 /* Find the 'hdrl' LIST tag */
4029 gst_buffer_extract (buf, 0, fourcc, 4);
4030 while (GST_READ_UINT32_LE (fourcc) != GST_RIFF_LIST_hdrl) {
4031 GST_LOG_OBJECT (avi, "buffer contains %" GST_FOURCC_FORMAT,
4032 GST_FOURCC_ARGS (GST_READ_UINT32_LE (fourcc)));
4033
4034 /* Eat up */
4035 gst_buffer_unref (buf);
4036
4037 /* read new chunk */
4038 res = gst_riff_read_chunk (element, avi->sinkpad, &avi->offset, &tag, &buf);
4039 if (res != GST_FLOW_OK)
4040 goto pull_range_failed;
4041 else if (tag != GST_RIFF_TAG_LIST)
4042 goto no_list;
4043 else if (gst_buffer_get_size (buf) < 4)
4044 goto no_header;
4045 gst_buffer_extract (buf, 0, fourcc, 4);
4046 }
4047
4048 GST_DEBUG_OBJECT (avi, "hdrl LIST tag found");
4049
4050 gst_avi_demux_roundup_list (avi, &buf);
4051
4052 /* the hdrl starts with a 'avih' header */
4053 if (!gst_riff_parse_chunk (element, buf, &offset, &tag, &sub))
4054 goto no_avih;
4055 else if (tag != GST_RIFF_TAG_avih)
4056 goto no_avih;
4057 else if (!gst_avi_demux_parse_avih (avi, sub, &avi->avih))
4058 goto invalid_avih;
4059
4060 GST_DEBUG_OBJECT (avi, "AVI header ok, reading elements from header");
4061
4062 /* now, read the elements from the header until the end */
4063 while (gst_riff_parse_chunk (element, buf, &offset, &tag, &sub)) {
4064 GstMapInfo map;
4065
4066 /* sub can be NULL on empty tags */
4067 if (!sub)
4068 continue;
4069
4070 gst_buffer_map (sub, &map, GST_MAP_READ);
4071
4072 switch (tag) {
4073 case GST_RIFF_TAG_LIST:
4074 if (map.size < 4)
4075 goto next;
4076
4077 switch (GST_READ_UINT32_LE (map.data)) {
4078 case GST_RIFF_LIST_strl:
4079 gst_buffer_unmap (sub, &map);
4080 if (!(gst_avi_demux_parse_stream (avi, sub))) {
4081 GST_ELEMENT_WARNING (avi, STREAM, DEMUX, (NULL),
4082 ("failed to parse stream, ignoring"));
4083 sub = NULL;
4084 }
4085 sub = NULL;
4086 goto next;
4087 case GST_RIFF_LIST_odml:
4088 gst_buffer_unmap (sub, &map);
4089 gst_avi_demux_parse_odml (avi, sub);
4090 sub = NULL;
4091 break;
4092 case GST_RIFF_LIST_INFO:
4093 gst_buffer_unmap (sub, &map);
4094 gst_buffer_resize (sub, 4, -1);
4095 gst_riff_parse_info (element, sub, &tags);
4096 if (tags) {
4097 if (avi->globaltags) {
4098 gst_tag_list_insert (avi->globaltags, tags,
4099 GST_TAG_MERGE_REPLACE);
4100 gst_tag_list_unref (tags);
4101 } else {
4102 avi->globaltags = tags;
4103 }
4104 }
4105 tags = NULL;
4106 gst_buffer_unref (sub);
4107 sub = NULL;
4108 break;
4109 case GST_RIFF_LIST_ncdt:
4110 gst_buffer_unmap (sub, &map);
4111 gst_buffer_resize (sub, 4, -1);
4112 gst_avi_demux_parse_ncdt (avi, sub, &tags);
4113 if (tags) {
4114 if (avi->globaltags) {
4115 gst_tag_list_insert (avi->globaltags, tags,
4116 GST_TAG_MERGE_REPLACE);
4117 gst_tag_list_unref (tags);
4118 } else {
4119 avi->globaltags = tags;
4120 }
4121 }
4122 tags = NULL;
4123 gst_buffer_unref (sub);
4124 sub = NULL;
4125 break;
4126 default:
4127 GST_WARNING_OBJECT (avi,
4128 "Unknown list %" GST_FOURCC_FORMAT " in AVI header",
4129 GST_FOURCC_ARGS (GST_READ_UINT32_LE (map.data)));
4130 GST_MEMDUMP_OBJECT (avi, "Unknown list", map.data, map.size);
4131 /* fall-through */
4132 case GST_RIFF_TAG_JUNQ:
4133 case GST_RIFF_TAG_JUNK:
4134 goto next;
4135 }
4136 break;
4137 case GST_RIFF_IDIT:
4138 gst_avi_demux_parse_idit (avi, sub);
4139 goto next;
4140 default:
4141 GST_WARNING_OBJECT (avi,
4142 "Unknown tag %" GST_FOURCC_FORMAT " in AVI header",
4143 GST_FOURCC_ARGS (tag));
4144 GST_MEMDUMP_OBJECT (avi, "Unknown tag", map.data, map.size);
4145 /* fall-through */
4146 case GST_RIFF_TAG_JUNQ:
4147 case GST_RIFF_TAG_JUNK:
4148 next:
4149 if (sub) {
4150 gst_buffer_unmap (sub, &map);
4151 gst_buffer_unref (sub);
4152 }
4153 sub = NULL;
4154 break;
4155 }
4156 }
4157 gst_buffer_unref (buf);
4158 GST_DEBUG ("elements parsed");
4159
4160 /* check parsed streams */
4161 if (avi->num_streams == 0)
4162 goto no_streams;
4163 else if (avi->num_streams != avi->avih->streams) {
4164 GST_WARNING_OBJECT (avi,
4165 "Stream header mentioned %d streams, but %d available",
4166 avi->avih->streams, avi->num_streams);
4167 }
4168
4169 GST_DEBUG_OBJECT (avi, "skipping junk between header and data, offset=%"
4170 G_GUINT64_FORMAT, avi->offset);
4171
4172 /* Now, find the data (i.e. skip all junk between header and data) */
4173 do {
4174 GstMapInfo map;
4175 guint size;
4176 guint32 tag, ltag;
4177
4178 buf = NULL;
4179 res = gst_pad_pull_range (avi->sinkpad, avi->offset, 12, &buf);
4180 if (res != GST_FLOW_OK) {
4181 GST_DEBUG_OBJECT (avi, "pull_range failure while looking for tags");
4182 goto pull_range_failed;
4183 } else if (gst_buffer_get_size (buf) < 12) {
4184 GST_DEBUG_OBJECT (avi,
4185 "got %" G_GSIZE_FORMAT " bytes which is less than 12 bytes",
4186 gst_buffer_get_size (buf));
4187 gst_buffer_unref (buf);
4188 return GST_FLOW_ERROR;
4189 }
4190
4191 gst_buffer_map (buf, &map, GST_MAP_READ);
4192 tag = GST_READ_UINT32_LE (map.data);
4193 size = GST_READ_UINT32_LE (map.data + 4);
4194 ltag = GST_READ_UINT32_LE (map.data + 8);
4195
4196 GST_DEBUG ("tag %" GST_FOURCC_FORMAT ", size %u",
4197 GST_FOURCC_ARGS (tag), size);
4198 GST_MEMDUMP ("Tag content", map.data, map.size);
4199 gst_buffer_unmap (buf, &map);
4200 gst_buffer_unref (buf);
4201
4202 switch (tag) {
4203 case GST_RIFF_TAG_LIST:{
4204 switch (ltag) {
4205 case GST_RIFF_LIST_movi:
4206 GST_DEBUG_OBJECT (avi,
4207 "Reached the 'movi' tag, we're done with skipping");
4208 goto skipping_done;
4209 case GST_RIFF_LIST_INFO:
4210 res =
4211 gst_riff_read_chunk (element, avi->sinkpad, &avi->offset, &tag,
4212 &buf);
4213 if (res != GST_FLOW_OK) {
4214 GST_DEBUG_OBJECT (avi, "couldn't read INFO chunk");
4215 goto pull_range_failed;
4216 }
4217 GST_DEBUG ("got size %" G_GSIZE_FORMAT, gst_buffer_get_size (buf));
4218 if (size < 4) {
4219 GST_DEBUG ("skipping INFO LIST prefix");
4220 avi->offset += (4 - GST_ROUND_UP_2 (size));
4221 gst_buffer_unref (buf);
4222 continue;
4223 }
4224
4225 sub = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, 4, -1);
4226 gst_riff_parse_info (element, sub, &tags);
4227 if (tags) {
4228 if (avi->globaltags) {
4229 gst_tag_list_insert (avi->globaltags, tags,
4230 GST_TAG_MERGE_REPLACE);
4231 gst_tag_list_unref (tags);
4232 } else {
4233 avi->globaltags = tags;
4234 }
4235 }
4236 tags = NULL;
4237 if (sub) {
4238 gst_buffer_unref (sub);
4239 sub = NULL;
4240 }
4241 gst_buffer_unref (buf);
4242 /* gst_riff_read_chunk() has already advanced avi->offset */
4243 break;
4244 case GST_RIFF_LIST_ncdt:
4245 res =
4246 gst_riff_read_chunk (element, avi->sinkpad, &avi->offset, &tag,
4247 &buf);
4248 if (res != GST_FLOW_OK) {
4249 GST_DEBUG_OBJECT (avi, "couldn't read ncdt chunk");
4250 goto pull_range_failed;
4251 }
4252 GST_DEBUG ("got size %" G_GSIZE_FORMAT, gst_buffer_get_size (buf));
4253 if (size < 4) {
4254 GST_DEBUG ("skipping ncdt LIST prefix");
4255 avi->offset += (4 - GST_ROUND_UP_2 (size));
4256 gst_buffer_unref (buf);
4257 continue;
4258 }
4259
4260 sub = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, 4, -1);
4261 gst_avi_demux_parse_ncdt (avi, sub, &tags);
4262 if (tags) {
4263 if (avi->globaltags) {
4264 gst_tag_list_insert (avi->globaltags, tags,
4265 GST_TAG_MERGE_REPLACE);
4266 gst_tag_list_unref (tags);
4267 } else {
4268 avi->globaltags = tags;
4269 }
4270 }
4271 tags = NULL;
4272 if (sub) {
4273 gst_buffer_unref (sub);
4274 sub = NULL;
4275 }
4276 gst_buffer_unref (buf);
4277 /* gst_riff_read_chunk() has already advanced avi->offset */
4278 break;
4279 default:
4280 GST_WARNING_OBJECT (avi,
4281 "Skipping unknown list tag %" GST_FOURCC_FORMAT,
4282 GST_FOURCC_ARGS (ltag));
4283 avi->offset += 8 + GST_ROUND_UP_2 (size);
4284 break;
4285 }
4286 }
4287 break;
4288 default:
4289 GST_WARNING_OBJECT (avi, "Skipping unknown tag %" GST_FOURCC_FORMAT,
4290 GST_FOURCC_ARGS (tag));
4291 /* Fall-through */
4292 case GST_MAKE_FOURCC ('J', 'U', 'N', 'Q'):
4293 case GST_MAKE_FOURCC ('J', 'U', 'N', 'K'):
4294 /* Only get buffer for debugging if the memdump is needed */
4295 if (gst_debug_category_get_threshold (GST_CAT_DEFAULT) >= 9) {
4296 buf = NULL;
4297 res = gst_pad_pull_range (avi->sinkpad, avi->offset, size, &buf);
4298 if (res != GST_FLOW_OK) {
4299 GST_DEBUG_OBJECT (avi, "couldn't read INFO chunk");
4300 goto pull_range_failed;
4301 }
4302 gst_buffer_map (buf, &map, GST_MAP_READ);
4303 GST_MEMDUMP ("Junk", map.data, map.size);
4304 gst_buffer_unmap (buf, &map);
4305 gst_buffer_unref (buf);
4306 }
4307 avi->offset += 8 + GST_ROUND_UP_2 (size);
4308 break;
4309 }
4310 } while (1);
4311 skipping_done:
4312
4313 GST_DEBUG_OBJECT (avi, "skipping done ... (streams=%u, stream[0].indexes=%p)",
4314 avi->num_streams, avi->stream[0].indexes);
4315
4316 /* create or read stream index (for seeking) */
4317 if (avi->stream[0].indexes != NULL) {
4318 /* we read a super index already (gst_avi_demux_parse_superindex() ) */
4319 gst_avi_demux_read_subindexes_pull (avi);
4320 }
4321 if (!avi->have_index) {
4322 if (avi->avih->flags & GST_RIFF_AVIH_HASINDEX)
4323 gst_avi_demux_stream_index (avi);
4324
4325 /* still no index, scan */
4326 if (!avi->have_index) {
4327 gst_avi_demux_stream_scan (avi);
4328
4329 /* still no index.. this is a fatal error for now.
4330 * FIXME, we should switch to plain push mode without seeking
4331 * instead of failing. */
4332 if (!avi->have_index)
4333 goto no_index;
4334 }
4335 }
4336 /* use the indexes now to construct nice durations */
4337 gst_avi_demux_calculate_durations_from_index (avi);
4338
4339 gst_avi_demux_expose_streams (avi, FALSE);
4340
4341 /* do initial seek to the default segment values */
4342 gst_avi_demux_do_seek (avi, &avi->segment, 0);
4343
4344 /* create initial NEWSEGMENT event */
4345 if (avi->seg_event)
4346 gst_event_unref (avi->seg_event);
4347 avi->seg_event = gst_event_new_segment (&avi->segment);
4348 if (avi->segment_seqnum)
4349 gst_event_set_seqnum (avi->seg_event, avi->segment_seqnum);
4350
4351 stamp = gst_util_get_timestamp () - stamp;
4352 GST_DEBUG_OBJECT (avi, "pulling header took %" GST_TIME_FORMAT,
4353 GST_TIME_ARGS (stamp));
4354
4355 /* at this point we know all the streams and we can signal the no more
4356 * pads signal */
4357 GST_DEBUG_OBJECT (avi, "signaling no more pads");
4358 gst_element_no_more_pads (GST_ELEMENT_CAST (avi));
4359
4360 return GST_FLOW_OK;
4361
4362 /* ERRORS */
4363 no_list:
4364 {
4365 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
4366 ("Invalid AVI header (no LIST at start): %"
4367 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)));
4368 gst_buffer_unref (buf);
4369 return GST_FLOW_ERROR;
4370 }
4371 no_header:
4372 {
4373 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
4374 ("Invalid AVI header (no hdrl at start): %"
4375 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)));
4376 gst_buffer_unref (buf);
4377 return GST_FLOW_ERROR;
4378 }
4379 no_avih:
4380 {
4381 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
4382 ("Invalid AVI header (no avih at start): %"
4383 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (tag)));
4384 if (sub)
4385 gst_buffer_unref (sub);
4386 gst_buffer_unref (buf);
4387 return GST_FLOW_ERROR;
4388 }
4389 invalid_avih:
4390 {
4391 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
4392 ("Invalid AVI header (cannot parse avih at start)"));
4393 gst_buffer_unref (buf);
4394 return GST_FLOW_ERROR;
4395 }
4396 no_streams:
4397 {
4398 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("No streams found"));
4399 return GST_FLOW_ERROR;
4400 }
4401 no_index:
4402 {
4403 GST_WARNING ("file without or too big index");
4404 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
4405 ("Could not get/create index"));
4406 return GST_FLOW_ERROR;
4407 }
4408 pull_range_failed:
4409 {
4410 if (res == GST_FLOW_FLUSHING)
4411 return res;
4412 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
4413 ("pull_range flow reading header: %s", gst_flow_get_name (res)));
4414 return res;
4415 }
4416 }
4417
4418 /* move a stream to @index */
4419 static void
gst_avi_demux_move_stream(GstAviDemux * avi,GstAviStream * stream,GstSegment * segment,guint index)4420 gst_avi_demux_move_stream (GstAviDemux * avi, GstAviStream * stream,
4421 GstSegment * segment, guint index)
4422 {
4423 GST_DEBUG_OBJECT (avi, "Move stream %d to %u", stream->num, index);
4424
4425 if (segment->rate < 0.0) {
4426 guint next_key;
4427 /* Because we don't know the frame order we need to push from the prev keyframe
4428 * to the next keyframe. If there is a smart decoder downstream he will notice
4429 * that there are too many encoded frames send and return EOS when there
4430 * are enough decoded frames to fill the segment. */
4431 next_key = gst_avi_demux_index_next (avi, stream, index, TRUE);
4432
4433 /* FIXME, we go back to 0, we should look at segment.start. We will however
4434 * stop earlier when the see the timestamp < segment.start */
4435 stream->start_entry = 0;
4436 stream->step_entry = index;
4437 stream->current_entry = index;
4438 stream->stop_entry = next_key;
4439
4440 GST_DEBUG_OBJECT (avi, "reverse seek: start %u, step %u, stop %u",
4441 stream->start_entry, stream->step_entry, stream->stop_entry);
4442 } else {
4443 stream->start_entry = index;
4444 stream->step_entry = index;
4445 stream->stop_entry = gst_avi_demux_index_last (avi, stream);
4446 }
4447 if (stream->current_entry != index) {
4448 GST_DEBUG_OBJECT (avi, "Move DISCONT from %u to %u",
4449 stream->current_entry, index);
4450 stream->current_entry = index;
4451 stream->discont = TRUE;
4452 }
4453
4454 /* update the buffer info */
4455 gst_avi_demux_get_buffer_info (avi, stream, index,
4456 &stream->current_timestamp, &stream->current_ts_end,
4457 &stream->current_offset, &stream->current_offset_end);
4458
4459 GST_DEBUG_OBJECT (avi, "Moved to %u, ts %" GST_TIME_FORMAT
4460 ", ts_end %" GST_TIME_FORMAT ", off %" G_GUINT64_FORMAT
4461 ", off_end %" G_GUINT64_FORMAT, index,
4462 GST_TIME_ARGS (stream->current_timestamp),
4463 GST_TIME_ARGS (stream->current_ts_end), stream->current_offset,
4464 stream->current_offset_end);
4465
4466 GST_DEBUG_OBJECT (avi, "Seeking to offset %" G_GUINT64_FORMAT,
4467 stream->index[index].offset);
4468 }
4469
4470 /*
4471 * Do the actual seeking.
4472 */
4473 static gboolean
gst_avi_demux_do_seek(GstAviDemux * avi,GstSegment * segment,GstSeekFlags flags)4474 gst_avi_demux_do_seek (GstAviDemux * avi, GstSegment * segment,
4475 GstSeekFlags flags)
4476 {
4477 GstClockTime seek_time;
4478 gboolean keyframe, before, after;
4479 guint i, index;
4480 GstAviStream *stream;
4481 gboolean next;
4482
4483 seek_time = segment->position;
4484 keyframe = ! !(flags & GST_SEEK_FLAG_KEY_UNIT);
4485 before = ! !(flags & GST_SEEK_FLAG_SNAP_BEFORE);
4486 after = ! !(flags & GST_SEEK_FLAG_SNAP_AFTER);
4487
4488 GST_DEBUG_OBJECT (avi, "seek to: %" GST_TIME_FORMAT
4489 " keyframe seeking:%d, %s", GST_TIME_ARGS (seek_time), keyframe,
4490 snap_types[before ? 1 : 0][after ? 1 : 0]);
4491
4492 /* FIXME, this code assumes the main stream with keyframes is stream 0,
4493 * which is mostly correct... */
4494 stream = &avi->stream[avi->main_stream];
4495
4496 next = after && !before;
4497 if (segment->rate < 0)
4498 next = !next;
4499
4500 /* get the entry index for the requested position */
4501 index = gst_avi_demux_index_for_time (avi, stream, seek_time, next);
4502 GST_DEBUG_OBJECT (avi, "Got entry %u", index);
4503 if (index == -1)
4504 return FALSE;
4505
4506 /* check if we are already on a keyframe */
4507 if (!ENTRY_IS_KEYFRAME (&stream->index[index])) {
4508 if (next) {
4509 GST_DEBUG_OBJECT (avi, "not keyframe, searching forward");
4510 /* now go to the next keyframe, this is where we should start
4511 * decoding from. */
4512 index = gst_avi_demux_index_next (avi, stream, index, TRUE);
4513 GST_DEBUG_OBJECT (avi, "next keyframe at %u", index);
4514 } else {
4515 GST_DEBUG_OBJECT (avi, "not keyframe, searching back");
4516 /* now go to the previous keyframe, this is where we should start
4517 * decoding from. */
4518 index = gst_avi_demux_index_prev (avi, stream, index, TRUE);
4519 GST_DEBUG_OBJECT (avi, "previous keyframe at %u", index);
4520 }
4521 }
4522
4523 /* move the main stream to this position */
4524 gst_avi_demux_move_stream (avi, stream, segment, index);
4525
4526 if (keyframe) {
4527 /* when seeking to a keyframe, we update the result seek time
4528 * to the time of the keyframe. */
4529 seek_time = stream->current_timestamp;
4530 GST_DEBUG_OBJECT (avi, "keyframe adjusted to %" GST_TIME_FORMAT,
4531 GST_TIME_ARGS (seek_time));
4532 /* the seek time is always the position ... */
4533 segment->position = seek_time;
4534 /* ... and start and stream time when going forwards,
4535 * otherwise only stop time */
4536 if (segment->rate > 0.0)
4537 segment->start = segment->time = seek_time;
4538 else
4539 segment->stop = seek_time;
4540 }
4541
4542 /* now set DISCONT and align the other streams */
4543 for (i = 0; i < avi->num_streams; i++) {
4544 GstAviStream *ostream;
4545
4546 ostream = &avi->stream[i];
4547 if ((ostream == stream) || (ostream->index == NULL))
4548 continue;
4549
4550 /* get the entry index for the requested position */
4551 index = gst_avi_demux_index_for_time (avi, ostream, seek_time, FALSE);
4552 if (index == -1)
4553 continue;
4554
4555 /* move to previous keyframe */
4556 if (!ENTRY_IS_KEYFRAME (&ostream->index[index]))
4557 index = gst_avi_demux_index_prev (avi, ostream, index, TRUE);
4558
4559 gst_avi_demux_move_stream (avi, ostream, segment, index);
4560 }
4561 GST_DEBUG_OBJECT (avi, "done seek to: %" GST_TIME_FORMAT,
4562 GST_TIME_ARGS (seek_time));
4563
4564 return TRUE;
4565 }
4566
4567 /*
4568 * Handle seek event in pull mode.
4569 */
4570 static gboolean
gst_avi_demux_handle_seek(GstAviDemux * avi,GstPad * pad,GstEvent * event)4571 gst_avi_demux_handle_seek (GstAviDemux * avi, GstPad * pad, GstEvent * event)
4572 {
4573 gdouble rate;
4574 GstFormat format;
4575 GstSeekFlags flags;
4576 GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
4577 gint64 cur, stop;
4578 gboolean flush;
4579 gboolean update;
4580 GstSegment seeksegment = { 0, };
4581 gint i;
4582 guint32 seqnum = 0;
4583
4584 if (event) {
4585 GST_DEBUG_OBJECT (avi, "doing seek with event");
4586
4587 gst_event_parse_seek (event, &rate, &format, &flags,
4588 &cur_type, &cur, &stop_type, &stop);
4589 seqnum = gst_event_get_seqnum (event);
4590
4591 /* we have to have a format as the segment format. Try to convert
4592 * if not. */
4593 if (format != GST_FORMAT_TIME) {
4594 gboolean res = TRUE;
4595
4596 if (cur_type != GST_SEEK_TYPE_NONE)
4597 res = gst_pad_query_convert (pad, format, cur, GST_FORMAT_TIME, &cur);
4598 if (res && stop_type != GST_SEEK_TYPE_NONE)
4599 res = gst_pad_query_convert (pad, format, stop, GST_FORMAT_TIME, &stop);
4600 if (!res)
4601 goto no_format;
4602
4603 format = GST_FORMAT_TIME;
4604 }
4605 GST_DEBUG_OBJECT (avi,
4606 "seek requested: rate %g cur %" GST_TIME_FORMAT " stop %"
4607 GST_TIME_FORMAT, rate, GST_TIME_ARGS (cur), GST_TIME_ARGS (stop));
4608 /* FIXME: can we do anything with rate!=1.0 */
4609 } else {
4610 GST_DEBUG_OBJECT (avi, "doing seek without event");
4611 flags = 0;
4612 rate = 1.0;
4613 }
4614
4615 /* save flush flag */
4616 flush = flags & GST_SEEK_FLAG_FLUSH;
4617
4618 if (flush) {
4619 GstEvent *fevent = gst_event_new_flush_start ();
4620
4621 if (seqnum)
4622 gst_event_set_seqnum (fevent, seqnum);
4623 /* for a flushing seek, we send a flush_start on all pads. This will
4624 * eventually stop streaming with a WRONG_STATE. We can thus eventually
4625 * take the STREAM_LOCK. */
4626 GST_DEBUG_OBJECT (avi, "sending flush start");
4627 gst_avi_demux_push_event (avi, gst_event_ref (fevent));
4628 gst_pad_push_event (avi->sinkpad, fevent);
4629 } else {
4630 /* a non-flushing seek, we PAUSE the task so that we can take the
4631 * STREAM_LOCK */
4632 GST_DEBUG_OBJECT (avi, "non flushing seek, pausing task");
4633 gst_pad_pause_task (avi->sinkpad);
4634 }
4635
4636 /* wait for streaming to stop */
4637 GST_DEBUG_OBJECT (avi, "wait for streaming to stop");
4638 GST_PAD_STREAM_LOCK (avi->sinkpad);
4639
4640 /* copy segment, we need this because we still need the old
4641 * segment when we close the current segment. */
4642 memcpy (&seeksegment, &avi->segment, sizeof (GstSegment));
4643
4644 if (event) {
4645 GST_DEBUG_OBJECT (avi, "configuring seek");
4646 gst_segment_do_seek (&seeksegment, rate, format, flags,
4647 cur_type, cur, stop_type, stop, &update);
4648 }
4649 /* do the seek, seeksegment.position contains the new position, this
4650 * actually never fails. */
4651 gst_avi_demux_do_seek (avi, &seeksegment, flags);
4652
4653 if (flush) {
4654 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4655
4656 if (seqnum)
4657 gst_event_set_seqnum (fevent, seqnum);
4658
4659 GST_DEBUG_OBJECT (avi, "sending flush stop");
4660 gst_avi_demux_push_event (avi, gst_event_ref (fevent));
4661 gst_pad_push_event (avi->sinkpad, fevent);
4662 }
4663
4664 /* now update the real segment info */
4665 memcpy (&avi->segment, &seeksegment, sizeof (GstSegment));
4666
4667 /* post the SEGMENT_START message when we do segmented playback */
4668 if (avi->segment.flags & GST_SEEK_FLAG_SEGMENT) {
4669 GstMessage *segment_start_msg =
4670 gst_message_new_segment_start (GST_OBJECT_CAST (avi),
4671 avi->segment.format, avi->segment.position);
4672 if (seqnum)
4673 gst_message_set_seqnum (segment_start_msg, seqnum);
4674 gst_element_post_message (GST_ELEMENT_CAST (avi), segment_start_msg);
4675 }
4676
4677 /* queue the segment event for the streaming thread. */
4678 if (avi->seg_event)
4679 gst_event_unref (avi->seg_event);
4680 avi->seg_event = gst_event_new_segment (&avi->segment);
4681 if (seqnum)
4682 gst_event_set_seqnum (avi->seg_event, seqnum);
4683 avi->segment_seqnum = seqnum;
4684
4685 if (!avi->streaming) {
4686 gst_pad_start_task (avi->sinkpad, (GstTaskFunction) gst_avi_demux_loop,
4687 avi->sinkpad, NULL);
4688 }
4689 /* reset the last flow and mark discont, seek is always DISCONT */
4690 for (i = 0; i < avi->num_streams; i++) {
4691 GST_DEBUG_OBJECT (avi, "marking DISCONT");
4692 avi->stream[i].discont = TRUE;
4693 }
4694 /* likewise for the whole new segment */
4695 gst_flow_combiner_reset (avi->flowcombiner);
4696 GST_PAD_STREAM_UNLOCK (avi->sinkpad);
4697
4698 return TRUE;
4699
4700 /* ERRORS */
4701 no_format:
4702 {
4703 GST_DEBUG_OBJECT (avi, "unsupported format given, seek aborted.");
4704 return FALSE;
4705 }
4706 }
4707
4708 /*
4709 * Handle seek event in push mode.
4710 */
4711 static gboolean
avi_demux_handle_seek_push(GstAviDemux * avi,GstPad * pad,GstEvent * event)4712 avi_demux_handle_seek_push (GstAviDemux * avi, GstPad * pad, GstEvent * event)
4713 {
4714 gdouble rate;
4715 GstFormat format;
4716 GstSeekFlags flags;
4717 GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
4718 gint64 cur, stop;
4719 gboolean keyframe, before, after, next;
4720 GstAviStream *stream;
4721 guint index;
4722 guint n, str_num;
4723 guint64 min_offset;
4724 GstSegment seeksegment;
4725 gboolean update;
4726
4727 /* check we have the index */
4728 if (!avi->have_index) {
4729 GST_DEBUG_OBJECT (avi, "no seek index built, seek aborted.");
4730 return FALSE;
4731 } else {
4732 GST_DEBUG_OBJECT (avi, "doing push-based seek with event");
4733 }
4734
4735 gst_event_parse_seek (event, &rate, &format, &flags,
4736 &cur_type, &cur, &stop_type, &stop);
4737
4738 if (format != GST_FORMAT_TIME) {
4739 gboolean res = TRUE;
4740
4741 if (cur_type != GST_SEEK_TYPE_NONE)
4742 res = gst_pad_query_convert (pad, format, cur, GST_FORMAT_TIME, &cur);
4743 if (res && stop_type != GST_SEEK_TYPE_NONE)
4744 res = gst_pad_query_convert (pad, format, stop, GST_FORMAT_TIME, &stop);
4745 if (!res) {
4746 GST_DEBUG_OBJECT (avi, "unsupported format given, seek aborted.");
4747 return FALSE;
4748 }
4749
4750 format = GST_FORMAT_TIME;
4751 }
4752
4753 /* let gst_segment handle any tricky stuff */
4754 GST_DEBUG_OBJECT (avi, "configuring seek");
4755 memcpy (&seeksegment, &avi->segment, sizeof (GstSegment));
4756 gst_segment_do_seek (&seeksegment, rate, format, flags,
4757 cur_type, cur, stop_type, stop, &update);
4758
4759 keyframe = ! !(flags & GST_SEEK_FLAG_KEY_UNIT);
4760 cur = seeksegment.position;
4761 before = ! !(flags & GST_SEEK_FLAG_SNAP_BEFORE);
4762 after = ! !(flags & GST_SEEK_FLAG_SNAP_AFTER);
4763
4764 GST_DEBUG_OBJECT (avi,
4765 "Seek requested: ts %" GST_TIME_FORMAT " stop %" GST_TIME_FORMAT
4766 ", kf %u, %s, rate %lf", GST_TIME_ARGS (cur), GST_TIME_ARGS (stop),
4767 keyframe, snap_types[before ? 1 : 0][after ? 1 : 0], rate);
4768
4769 if (rate < 0) {
4770 GST_DEBUG_OBJECT (avi, "negative rate seek not supported in push mode");
4771 return FALSE;
4772 }
4773
4774 /* FIXME, this code assumes the main stream with keyframes is stream 0,
4775 * which is mostly correct... */
4776 str_num = avi->main_stream;
4777 stream = &avi->stream[str_num];
4778
4779 next = after && !before;
4780 if (seeksegment.rate < 0)
4781 next = !next;
4782
4783 /* get the entry index for the requested position */
4784 index = gst_avi_demux_index_for_time (avi, stream, cur, next);
4785 GST_DEBUG_OBJECT (avi, "str %u: Found entry %u for %" GST_TIME_FORMAT,
4786 str_num, index, GST_TIME_ARGS (cur));
4787 if (index == -1)
4788 return -1;
4789
4790 /* check if we are already on a keyframe */
4791 if (!ENTRY_IS_KEYFRAME (&stream->index[index])) {
4792 if (next) {
4793 GST_DEBUG_OBJECT (avi, "Entry is not a keyframe - searching forward");
4794 /* now go to the next keyframe, this is where we should start
4795 * decoding from. */
4796 index = gst_avi_demux_index_next (avi, stream, index, TRUE);
4797 GST_DEBUG_OBJECT (avi, "Found next keyframe at %u", index);
4798 } else {
4799 GST_DEBUG_OBJECT (avi, "Entry is not a keyframe - searching back");
4800 /* now go to the previous keyframe, this is where we should start
4801 * decoding from. */
4802 index = gst_avi_demux_index_prev (avi, stream, index, TRUE);
4803 GST_DEBUG_OBJECT (avi, "Found previous keyframe at %u", index);
4804 }
4805 }
4806
4807 gst_avi_demux_get_buffer_info (avi, stream, index,
4808 &stream->current_timestamp, &stream->current_ts_end,
4809 &stream->current_offset, &stream->current_offset_end);
4810
4811 /* re-use cur to be the timestamp of the seek as it _will_ be */
4812 cur = stream->current_timestamp;
4813
4814 min_offset = stream->index[index].offset;
4815 avi->seek_kf_offset = min_offset - 8;
4816
4817 GST_DEBUG_OBJECT (avi,
4818 "Seek to: ts %" GST_TIME_FORMAT " (on str %u, idx %u, offset %"
4819 G_GUINT64_FORMAT ")", GST_TIME_ARGS (stream->current_timestamp), str_num,
4820 index, min_offset);
4821
4822 for (n = 0; n < avi->num_streams; n++) {
4823 GstAviStream *str = &avi->stream[n];
4824 guint idx;
4825
4826 if (n == avi->main_stream)
4827 continue;
4828
4829 /* get the entry index for the requested position */
4830 idx = gst_avi_demux_index_for_time (avi, str, cur, FALSE);
4831 GST_DEBUG_OBJECT (avi, "str %u: Found entry %u for %" GST_TIME_FORMAT, n,
4832 idx, GST_TIME_ARGS (cur));
4833 if (idx == -1)
4834 continue;
4835
4836 /* check if we are already on a keyframe */
4837 if (!ENTRY_IS_KEYFRAME (&str->index[idx])) {
4838 if (next) {
4839 GST_DEBUG_OBJECT (avi, "Entry is not a keyframe - searching forward");
4840 /* now go to the next keyframe, this is where we should start
4841 * decoding from. */
4842 idx = gst_avi_demux_index_next (avi, str, idx, TRUE);
4843 GST_DEBUG_OBJECT (avi, "Found next keyframe at %u", idx);
4844 } else {
4845 GST_DEBUG_OBJECT (avi, "Entry is not a keyframe - searching back");
4846 /* now go to the previous keyframe, this is where we should start
4847 * decoding from. */
4848 idx = gst_avi_demux_index_prev (avi, str, idx, TRUE);
4849 GST_DEBUG_OBJECT (avi, "Found previous keyframe at %u", idx);
4850 }
4851 }
4852
4853 gst_avi_demux_get_buffer_info (avi, str, idx,
4854 &str->current_timestamp, &str->current_ts_end,
4855 &str->current_offset, &str->current_offset_end);
4856
4857 if (str->index[idx].offset < min_offset) {
4858 min_offset = str->index[idx].offset;
4859 GST_DEBUG_OBJECT (avi,
4860 "Found an earlier offset at %" G_GUINT64_FORMAT ", str %u",
4861 min_offset, n);
4862 str_num = n;
4863 stream = str;
4864 index = idx;
4865 }
4866 }
4867
4868 GST_DEBUG_OBJECT (avi,
4869 "Seek performed: str %u, offset %" G_GUINT64_FORMAT ", idx %u, ts %"
4870 GST_TIME_FORMAT ", ts_end %" GST_TIME_FORMAT ", off %" G_GUINT64_FORMAT
4871 ", off_end %" G_GUINT64_FORMAT, str_num, min_offset, index,
4872 GST_TIME_ARGS (stream->current_timestamp),
4873 GST_TIME_ARGS (stream->current_ts_end), stream->current_offset,
4874 stream->current_offset_end);
4875
4876 /* index data refers to data, not chunk header (for pull mode convenience) */
4877 min_offset -= 8;
4878 GST_DEBUG_OBJECT (avi, "seeking to chunk at offset %" G_GUINT64_FORMAT,
4879 min_offset);
4880
4881 if (!perform_seek_to_offset (avi, min_offset, gst_event_get_seqnum (event))) {
4882 GST_DEBUG_OBJECT (avi, "seek event failed!");
4883 return FALSE;
4884 }
4885
4886 return TRUE;
4887 }
4888
4889 /*
4890 * Handle whether we can perform the seek event or if we have to let the chain
4891 * function handle seeks to build the seek indexes first.
4892 */
4893 static gboolean
gst_avi_demux_handle_seek_push(GstAviDemux * avi,GstPad * pad,GstEvent * event)4894 gst_avi_demux_handle_seek_push (GstAviDemux * avi, GstPad * pad,
4895 GstEvent * event)
4896 {
4897 /* check for having parsed index already */
4898 if (!avi->have_index) {
4899 guint64 offset = 0;
4900 gboolean building_index;
4901
4902 GST_OBJECT_LOCK (avi);
4903 /* handle the seek event in the chain function */
4904 avi->state = GST_AVI_DEMUX_SEEK;
4905
4906 /* copy the event */
4907 if (avi->seek_event)
4908 gst_event_unref (avi->seek_event);
4909 avi->seek_event = gst_event_ref (event);
4910
4911 /* set the building_index flag so that only one thread can setup the
4912 * structures for index seeking. */
4913 building_index = avi->building_index;
4914 if (!building_index) {
4915 avi->building_index = TRUE;
4916 if (avi->stream[0].indexes) {
4917 avi->odml_stream = 0;
4918 avi->odml_subidxs = avi->stream[avi->odml_stream].indexes;
4919 offset = avi->odml_subidxs[0];
4920 } else {
4921 offset = avi->idx1_offset;
4922 }
4923 }
4924 GST_OBJECT_UNLOCK (avi);
4925
4926 if (!building_index) {
4927 /* seek to the first subindex or legacy index */
4928 GST_INFO_OBJECT (avi,
4929 "Seeking to legacy index/first subindex at %" G_GUINT64_FORMAT,
4930 offset);
4931 return perform_seek_to_offset (avi, offset, gst_event_get_seqnum (event));
4932 }
4933
4934 /* FIXME: we have to always return true so that we don't block the seek
4935 * thread.
4936 * Note: maybe it is OK to return true if we're still building the index */
4937 return TRUE;
4938 }
4939
4940 return avi_demux_handle_seek_push (avi, pad, event);
4941 }
4942
4943 /*
4944 * Helper for gst_avi_demux_invert()
4945 */
4946 static inline void
swap_line(guint8 * d1,guint8 * d2,guint8 * tmp,gint bytes)4947 swap_line (guint8 * d1, guint8 * d2, guint8 * tmp, gint bytes)
4948 {
4949 memcpy (tmp, d1, bytes);
4950 memcpy (d1, d2, bytes);
4951 memcpy (d2, tmp, bytes);
4952 }
4953
4954
4955 #define gst_avi_demux_is_uncompressed(fourcc) \
4956 (fourcc == GST_RIFF_DIB || \
4957 fourcc == GST_RIFF_rgb || \
4958 fourcc == GST_RIFF_RGB || fourcc == GST_RIFF_RAW)
4959
4960 /*
4961 * Invert DIB buffers... Takes existing buffer and
4962 * returns either the buffer or a new one (with old
4963 * one dereferenced).
4964 * FIXME: can't we preallocate tmp? and remember stride, bpp?
4965 */
4966 static GstBuffer *
gst_avi_demux_invert(GstAviStream * stream,GstBuffer * buf)4967 gst_avi_demux_invert (GstAviStream * stream, GstBuffer * buf)
4968 {
4969 gint y, w, h;
4970 gint bpp, stride;
4971 guint8 *tmp = NULL;
4972 GstMapInfo map;
4973 guint32 fourcc;
4974
4975 if (stream->strh->type != GST_RIFF_FCC_vids)
4976 return buf;
4977
4978 if (stream->strf.vids == NULL) {
4979 GST_WARNING ("Failed to retrieve vids for stream");
4980 return buf;
4981 }
4982
4983 fourcc = (stream->strf.vids->compression) ?
4984 stream->strf.vids->compression : stream->strh->fcc_handler;
4985 if (!gst_avi_demux_is_uncompressed (fourcc)) {
4986 return buf; /* Ignore non DIB buffers */
4987 }
4988
4989 /* raw rgb data is stored topdown, but instead of inverting the buffer, */
4990 /* some tools just negate the height field in the header (e.g. ffmpeg) */
4991 if (((gint32) stream->strf.vids->height) < 0)
4992 return buf;
4993
4994 h = stream->strf.vids->height;
4995 w = stream->strf.vids->width;
4996 bpp = stream->strf.vids->bit_cnt ? stream->strf.vids->bit_cnt : 8;
4997 stride = GST_ROUND_UP_4 (w * (bpp / 8));
4998
4999 buf = gst_buffer_make_writable (buf);
5000
5001 gst_buffer_map (buf, &map, GST_MAP_READWRITE);
5002 if (map.size < (stride * h)) {
5003 GST_WARNING ("Buffer is smaller than reported Width x Height x Depth");
5004 gst_buffer_unmap (buf, &map);
5005 return buf;
5006 }
5007
5008 tmp = g_malloc (stride);
5009
5010 for (y = 0; y < h / 2; y++) {
5011 swap_line (map.data + stride * y, map.data + stride * (h - 1 - y), tmp,
5012 stride);
5013 }
5014
5015 g_free (tmp);
5016
5017 gst_buffer_unmap (buf, &map);
5018
5019 /* append palette to paletted RGB8 buffer data */
5020 if (stream->rgb8_palette != NULL)
5021 buf = gst_buffer_append (buf, gst_buffer_ref (stream->rgb8_palette));
5022
5023 return buf;
5024 }
5025
5026 #if 0
5027 static void
5028 gst_avi_demux_add_assoc (GstAviDemux * avi, GstAviStream * stream,
5029 GstClockTime timestamp, guint64 offset, gboolean keyframe)
5030 {
5031 /* do not add indefinitely for open-ended streaming */
5032 if (G_UNLIKELY (avi->element_index && avi->seekable)) {
5033 GST_LOG_OBJECT (avi, "adding association %" GST_TIME_FORMAT "-> %"
5034 G_GUINT64_FORMAT, GST_TIME_ARGS (timestamp), offset);
5035 gst_index_add_association (avi->element_index, avi->index_id,
5036 keyframe ? GST_ASSOCIATION_FLAG_KEY_UNIT :
5037 GST_ASSOCIATION_FLAG_DELTA_UNIT, GST_FORMAT_TIME, timestamp,
5038 GST_FORMAT_BYTES, offset, NULL);
5039 /* current_entry is DEFAULT (frame #) */
5040 gst_index_add_association (avi->element_index, stream->index_id,
5041 keyframe ? GST_ASSOCIATION_FLAG_KEY_UNIT :
5042 GST_ASSOCIATION_FLAG_DELTA_UNIT, GST_FORMAT_TIME, timestamp,
5043 GST_FORMAT_BYTES, offset, GST_FORMAT_DEFAULT, stream->current_entry,
5044 NULL);
5045 }
5046 }
5047 #endif
5048
5049 /*
5050 * Returns the aggregated GstFlowReturn.
5051 */
5052 static GstFlowReturn
gst_avi_demux_combine_flows(GstAviDemux * avi,GstAviStream * stream,GstFlowReturn ret)5053 gst_avi_demux_combine_flows (GstAviDemux * avi, GstAviStream * stream,
5054 GstFlowReturn ret)
5055 {
5056 GST_LOG_OBJECT (avi, "Stream %s:%s flow return: %s",
5057 GST_DEBUG_PAD_NAME (stream->pad), gst_flow_get_name (ret));
5058 ret = gst_flow_combiner_update_pad_flow (avi->flowcombiner, stream->pad, ret);
5059 GST_LOG_OBJECT (avi, "combined to return %s", gst_flow_get_name (ret));
5060
5061 return ret;
5062 }
5063
5064 /* move @stream to the next position in its index */
5065 static GstFlowReturn
gst_avi_demux_advance(GstAviDemux * avi,GstAviStream * stream,GstFlowReturn ret)5066 gst_avi_demux_advance (GstAviDemux * avi, GstAviStream * stream,
5067 GstFlowReturn ret)
5068 {
5069 guint old_entry, new_entry;
5070
5071 old_entry = stream->current_entry;
5072 /* move forwards */
5073 new_entry = old_entry + 1;
5074
5075 /* see if we reached the end */
5076 if (new_entry >= stream->stop_entry) {
5077 if (avi->segment.rate < 0.0) {
5078 if (stream->step_entry == stream->start_entry) {
5079 /* we stepped all the way to the start, eos */
5080 GST_DEBUG_OBJECT (avi, "reverse reached start %u", stream->start_entry);
5081 goto eos;
5082 }
5083 /* backwards, stop becomes step, find a new step */
5084 stream->stop_entry = stream->step_entry;
5085 stream->step_entry = gst_avi_demux_index_prev (avi, stream,
5086 stream->stop_entry, TRUE);
5087
5088 GST_DEBUG_OBJECT (avi,
5089 "reverse playback jump: start %u, step %u, stop %u",
5090 stream->start_entry, stream->step_entry, stream->stop_entry);
5091
5092 /* and start from the previous keyframe now */
5093 new_entry = stream->step_entry;
5094 } else {
5095 /* EOS */
5096 GST_DEBUG_OBJECT (avi, "forward reached stop %u", stream->stop_entry);
5097 goto eos;
5098 }
5099 }
5100
5101 if (new_entry != old_entry) {
5102 stream->current_entry = new_entry;
5103 stream->current_total = stream->index[new_entry].total;
5104
5105 if (new_entry == old_entry + 1) {
5106 GST_DEBUG_OBJECT (avi, "moved forwards from %u to %u",
5107 old_entry, new_entry);
5108 /* we simply moved one step forwards, reuse current info */
5109 stream->current_timestamp = stream->current_ts_end;
5110 stream->current_offset = stream->current_offset_end;
5111 gst_avi_demux_get_buffer_info (avi, stream, new_entry,
5112 NULL, &stream->current_ts_end, NULL, &stream->current_offset_end);
5113 } else {
5114 /* we moved DISCONT, full update */
5115 gst_avi_demux_get_buffer_info (avi, stream, new_entry,
5116 &stream->current_timestamp, &stream->current_ts_end,
5117 &stream->current_offset, &stream->current_offset_end);
5118 /* and MARK discont for this stream */
5119 stream->discont = TRUE;
5120 GST_DEBUG_OBJECT (avi, "Moved from %u to %u, ts %" GST_TIME_FORMAT
5121 ", ts_end %" GST_TIME_FORMAT ", off %" G_GUINT64_FORMAT
5122 ", off_end %" G_GUINT64_FORMAT, old_entry, new_entry,
5123 GST_TIME_ARGS (stream->current_timestamp),
5124 GST_TIME_ARGS (stream->current_ts_end), stream->current_offset,
5125 stream->current_offset_end);
5126 }
5127 }
5128 return ret;
5129
5130 /* ERROR */
5131 eos:
5132 {
5133 GST_DEBUG_OBJECT (avi, "we are EOS");
5134 /* setting current_timestamp to -1 marks EOS */
5135 stream->current_timestamp = -1;
5136 return GST_FLOW_EOS;
5137 }
5138 }
5139
5140 /* find the stream with the lowest current position when going forwards or with
5141 * the highest position when going backwards, this is the stream
5142 * we should push from next */
5143 static gint
gst_avi_demux_find_next(GstAviDemux * avi,gfloat rate)5144 gst_avi_demux_find_next (GstAviDemux * avi, gfloat rate)
5145 {
5146 guint64 min_time, max_time;
5147 guint stream_num, i;
5148
5149 max_time = 0;
5150 min_time = G_MAXUINT64;
5151 stream_num = -1;
5152
5153 for (i = 0; i < avi->num_streams; i++) {
5154 guint64 position;
5155 GstAviStream *stream;
5156
5157 stream = &avi->stream[i];
5158
5159 /* ignore streams that finished */
5160 if (stream->pad && GST_PAD_LAST_FLOW_RETURN (stream->pad) == GST_FLOW_EOS)
5161 continue;
5162
5163 position = stream->current_timestamp;
5164
5165 /* position of -1 is EOS */
5166 if (position != -1) {
5167 if (rate > 0.0 && position < min_time) {
5168 min_time = position;
5169 stream_num = i;
5170 } else if (rate < 0.0 && position >= max_time) {
5171 max_time = position;
5172 stream_num = i;
5173 }
5174 }
5175 }
5176 return stream_num;
5177 }
5178
5179 static GstBuffer *
gst_avi_demux_align_buffer(GstAviDemux * demux,GstBuffer * buffer,gsize alignment)5180 gst_avi_demux_align_buffer (GstAviDemux * demux,
5181 GstBuffer * buffer, gsize alignment)
5182 {
5183 GstMapInfo map;
5184
5185 gst_buffer_map (buffer, &map, GST_MAP_READ);
5186
5187 if (map.size < sizeof (guintptr)) {
5188 gst_buffer_unmap (buffer, &map);
5189 return buffer;
5190 }
5191
5192 if (((guintptr) map.data) & (alignment - 1)) {
5193 GstBuffer *new_buffer;
5194 GstAllocationParams params = { 0, alignment - 1, 0, 0, };
5195
5196 new_buffer = gst_buffer_new_allocate (NULL,
5197 gst_buffer_get_size (buffer), ¶ms);
5198
5199 /* Copy data "by hand", so ensure alignment is kept: */
5200 gst_buffer_fill (new_buffer, 0, map.data, map.size);
5201
5202 gst_buffer_copy_into (new_buffer, buffer, GST_BUFFER_COPY_METADATA, 0, -1);
5203 GST_DEBUG_OBJECT (demux,
5204 "We want output aligned on %" G_GSIZE_FORMAT ", reallocated",
5205 alignment);
5206
5207 gst_buffer_unmap (buffer, &map);
5208 gst_buffer_unref (buffer);
5209
5210 return new_buffer;
5211 }
5212
5213 gst_buffer_unmap (buffer, &map);
5214 return buffer;
5215 }
5216
5217 static GstFlowReturn
gst_avi_demux_loop_data(GstAviDemux * avi)5218 gst_avi_demux_loop_data (GstAviDemux * avi)
5219 {
5220 GstFlowReturn ret = GST_FLOW_OK;
5221 guint stream_num;
5222 GstAviStream *stream;
5223 gboolean processed = FALSE;
5224 GstBuffer *buf;
5225 guint64 offset, size;
5226 GstClockTime timestamp, duration;
5227 guint64 out_offset, out_offset_end;
5228 gboolean keyframe;
5229 GstAviIndexEntry *entry;
5230
5231 do {
5232 stream_num = gst_avi_demux_find_next (avi, avi->segment.rate);
5233
5234 /* all are EOS */
5235 if (G_UNLIKELY (stream_num == -1)) {
5236 GST_DEBUG_OBJECT (avi, "all streams are EOS");
5237 goto eos;
5238 }
5239
5240 /* we have the stream now */
5241 stream = &avi->stream[stream_num];
5242
5243 /* skip streams without pads */
5244 if (!stream->pad) {
5245 GST_DEBUG_OBJECT (avi, "skipping entry from stream %d without pad",
5246 stream_num);
5247 goto next;
5248 }
5249
5250 /* get the timing info for the entry */
5251 timestamp = stream->current_timestamp;
5252 duration = stream->current_ts_end - timestamp;
5253 out_offset = stream->current_offset;
5254 out_offset_end = stream->current_offset_end;
5255
5256 /* get the entry data info */
5257 entry = &stream->index[stream->current_entry];
5258 offset = entry->offset;
5259 size = entry->size;
5260 keyframe = ENTRY_IS_KEYFRAME (entry);
5261
5262 /* skip empty entries */
5263 if (size == 0) {
5264 GST_DEBUG_OBJECT (avi, "Skipping entry %u (%" G_GUINT64_FORMAT ", %p)",
5265 stream->current_entry, size, stream->pad);
5266 goto next;
5267 }
5268
5269 if (avi->segment.rate > 0.0) {
5270 /* only check this for fowards playback for now */
5271 if (keyframe && GST_CLOCK_TIME_IS_VALID (avi->segment.stop)
5272 && (timestamp > avi->segment.stop)) {
5273 goto eos_stop;
5274 }
5275 } else {
5276 if (keyframe && GST_CLOCK_TIME_IS_VALID (avi->segment.start)
5277 && (timestamp < avi->segment.start))
5278 goto eos_stop;
5279 }
5280
5281 GST_LOG ("reading buffer (size=%" G_GUINT64_FORMAT "), stream %d, pos %"
5282 G_GUINT64_FORMAT " (0x%" G_GINT64_MODIFIER "x), kf %d", size,
5283 stream_num, offset, offset, keyframe);
5284
5285 /* FIXME, check large chunks and cut them up */
5286
5287 /* pull in the data */
5288 buf = NULL;
5289 ret = gst_pad_pull_range (avi->sinkpad, offset, size, &buf);
5290 if (ret != GST_FLOW_OK)
5291 goto pull_failed;
5292
5293 /* check for short buffers, this is EOS as well */
5294 if (gst_buffer_get_size (buf) < size)
5295 goto short_buffer;
5296
5297 /* invert the picture if needed, and append palette for RGB8P */
5298 buf = gst_avi_demux_invert (stream, buf);
5299
5300 /* mark non-keyframes */
5301 if (keyframe || stream->is_raw) {
5302 GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
5303 GST_BUFFER_PTS (buf) = timestamp;
5304 } else {
5305 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
5306 GST_BUFFER_PTS (buf) = GST_CLOCK_TIME_NONE;
5307 }
5308
5309 GST_BUFFER_DTS (buf) = timestamp;
5310
5311 GST_BUFFER_DURATION (buf) = duration;
5312 GST_BUFFER_OFFSET (buf) = out_offset;
5313 GST_BUFFER_OFFSET_END (buf) = out_offset_end;
5314
5315 /* mark discont when pending */
5316 if (stream->discont) {
5317 GST_DEBUG_OBJECT (avi, "setting DISCONT flag");
5318 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
5319 stream->discont = FALSE;
5320 } else {
5321 GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DISCONT);
5322 }
5323 #if 0
5324 gst_avi_demux_add_assoc (avi, stream, timestamp, offset, keyframe);
5325 #endif
5326
5327 /* update current position in the segment */
5328 avi->segment.position = timestamp;
5329
5330 GST_DEBUG_OBJECT (avi, "Pushing buffer of size %" G_GSIZE_FORMAT ", ts %"
5331 GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT ", off %" G_GUINT64_FORMAT
5332 ", off_end %" G_GUINT64_FORMAT,
5333 gst_buffer_get_size (buf), GST_TIME_ARGS (timestamp),
5334 GST_TIME_ARGS (duration), out_offset, out_offset_end);
5335
5336 if (stream->alignment > 1)
5337 buf = gst_avi_demux_align_buffer (avi, buf, stream->alignment);
5338 ret = gst_pad_push (stream->pad, buf);
5339
5340 /* mark as processed, we increment the frame and byte counters then
5341 * leave the while loop and return the GstFlowReturn */
5342 processed = TRUE;
5343
5344 if (avi->segment.rate < 0) {
5345 if (timestamp > avi->segment.stop && ret == GST_FLOW_EOS) {
5346 /* In reverse playback we can get a GST_FLOW_EOS when
5347 * we are at the end of the segment, so we just need to jump
5348 * back to the previous section. */
5349 GST_DEBUG_OBJECT (avi, "downstream has reached end of segment");
5350 ret = GST_FLOW_OK;
5351 }
5352 }
5353 next:
5354 /* move to next item */
5355 ret = gst_avi_demux_advance (avi, stream, ret);
5356
5357 /* combine flows */
5358 ret = gst_avi_demux_combine_flows (avi, stream, ret);
5359 } while (!processed);
5360
5361 beach:
5362 return ret;
5363
5364 /* special cases */
5365 eos:
5366 {
5367 GST_DEBUG_OBJECT (avi, "No samples left for any streams - EOS");
5368 ret = GST_FLOW_EOS;
5369 goto beach;
5370 }
5371 eos_stop:
5372 {
5373 GST_LOG_OBJECT (avi, "Found keyframe after segment,"
5374 " setting EOS (%" GST_TIME_FORMAT " > %" GST_TIME_FORMAT ")",
5375 GST_TIME_ARGS (timestamp), GST_TIME_ARGS (avi->segment.stop));
5376 ret = GST_FLOW_EOS;
5377 /* move to next stream */
5378 goto next;
5379 }
5380 pull_failed:
5381 {
5382 GST_DEBUG_OBJECT (avi, "pull range failed: pos=%" G_GUINT64_FORMAT
5383 " size=%" G_GUINT64_FORMAT, offset, size);
5384 goto beach;
5385 }
5386 short_buffer:
5387 {
5388 GST_WARNING_OBJECT (avi, "Short read at offset %" G_GUINT64_FORMAT
5389 ", only got %" G_GSIZE_FORMAT "/%" G_GUINT64_FORMAT
5390 " bytes (truncated file?)", offset, gst_buffer_get_size (buf), size);
5391 gst_buffer_unref (buf);
5392 ret = GST_FLOW_EOS;
5393 goto beach;
5394 }
5395 }
5396
5397 /*
5398 * Read data. If we have an index it delegates to
5399 * gst_avi_demux_process_next_entry().
5400 */
5401 static GstFlowReturn
gst_avi_demux_stream_data(GstAviDemux * avi)5402 gst_avi_demux_stream_data (GstAviDemux * avi)
5403 {
5404 guint32 tag = 0;
5405 guint32 size = 0;
5406 gint stream_nr = 0;
5407 GstFlowReturn res = GST_FLOW_OK;
5408
5409 if (G_UNLIKELY (avi->have_eos)) {
5410 /* Clean adapter, we're done */
5411 gst_adapter_clear (avi->adapter);
5412 return GST_FLOW_EOS;
5413 }
5414
5415 if (G_UNLIKELY (avi->todrop)) {
5416 guint drop;
5417
5418 if ((drop = gst_adapter_available (avi->adapter))) {
5419 if (drop > avi->todrop)
5420 drop = avi->todrop;
5421 GST_DEBUG_OBJECT (avi, "Dropping %d bytes", drop);
5422 gst_adapter_flush (avi->adapter, drop);
5423 avi->todrop -= drop;
5424 avi->offset += drop;
5425 }
5426 }
5427
5428 /* Iterate until need more data, so adapter won't grow too much */
5429 while (1) {
5430 if (G_UNLIKELY (!gst_avi_demux_peek_chunk_info (avi, &tag, &size))) {
5431 return GST_FLOW_OK;
5432 }
5433
5434 GST_DEBUG ("Trying chunk (%" GST_FOURCC_FORMAT "), size %d",
5435 GST_FOURCC_ARGS (tag), size);
5436
5437 if (G_LIKELY ((tag & 0xff) >= '0' && (tag & 0xff) <= '9' &&
5438 ((tag >> 8) & 0xff) >= '0' && ((tag >> 8) & 0xff) <= '9')) {
5439 GST_LOG ("Chunk ok");
5440 } else if ((tag & 0xffff) == (('x' << 8) | 'i')) {
5441 GST_DEBUG ("Found sub-index tag");
5442 if (gst_avi_demux_peek_chunk (avi, &tag, &size) || size == 0) {
5443 /* accept 0 size buffer here */
5444 avi->abort_buffering = FALSE;
5445 GST_DEBUG (" skipping %d bytes for now", size);
5446 gst_adapter_flush (avi->adapter, 8 + GST_ROUND_UP_2 (size));
5447 }
5448 return GST_FLOW_OK;
5449 } else if (tag == GST_RIFF_TAG_RIFF) {
5450 /* RIFF tags can appear in ODML files, just jump over them */
5451 if (gst_adapter_available (avi->adapter) >= 12) {
5452 GST_DEBUG ("Found RIFF tag, skipping RIFF header");
5453 gst_adapter_flush (avi->adapter, 12);
5454 continue;
5455 }
5456 return GST_FLOW_OK;
5457 } else if (tag == GST_RIFF_TAG_idx1) {
5458 GST_DEBUG ("Found index tag");
5459 if (gst_avi_demux_peek_chunk (avi, &tag, &size) || size == 0) {
5460 /* accept 0 size buffer here */
5461 avi->abort_buffering = FALSE;
5462 GST_DEBUG (" skipping %d bytes for now", size);
5463 gst_adapter_flush (avi->adapter, 8 + GST_ROUND_UP_2 (size));
5464 }
5465 return GST_FLOW_OK;
5466 } else if (tag == GST_RIFF_TAG_LIST) {
5467 /* movi chunks might be grouped in rec list */
5468 if (gst_adapter_available (avi->adapter) >= 12) {
5469 GST_DEBUG ("Found LIST tag, skipping LIST header");
5470 gst_adapter_flush (avi->adapter, 12);
5471 continue;
5472 }
5473 return GST_FLOW_OK;
5474 } else if (tag == GST_RIFF_TAG_JUNK || tag == GST_RIFF_TAG_JUNQ) {
5475 /* rec list might contain JUNK chunks */
5476 GST_DEBUG ("Found JUNK tag");
5477 if (gst_avi_demux_peek_chunk (avi, &tag, &size) || size == 0) {
5478 /* accept 0 size buffer here */
5479 avi->abort_buffering = FALSE;
5480 GST_DEBUG (" skipping %d bytes for now", size);
5481 gst_adapter_flush (avi->adapter, 8 + GST_ROUND_UP_2 (size));
5482 }
5483 return GST_FLOW_OK;
5484 } else {
5485 GST_DEBUG ("No more stream chunks, send EOS");
5486 avi->have_eos = TRUE;
5487 return GST_FLOW_EOS;
5488 }
5489
5490 if (G_UNLIKELY (!gst_avi_demux_peek_chunk (avi, &tag, &size))) {
5491 /* supposedly one hopes to catch a nicer chunk later on ... */
5492 /* FIXME ?? give up here rather than possibly ending up going
5493 * through the whole file */
5494 if (avi->abort_buffering) {
5495 avi->abort_buffering = FALSE;
5496 if (size) {
5497 gst_adapter_flush (avi->adapter, 8);
5498 return GST_FLOW_OK;
5499 }
5500 } else {
5501 return GST_FLOW_OK;
5502 }
5503 }
5504 GST_DEBUG ("chunk ID %" GST_FOURCC_FORMAT ", size %u",
5505 GST_FOURCC_ARGS (tag), size);
5506
5507 stream_nr = CHUNKID_TO_STREAMNR (tag);
5508
5509 if (G_UNLIKELY (stream_nr < 0 || stream_nr >= avi->num_streams)) {
5510 /* recoverable */
5511 GST_WARNING ("Invalid stream ID %d (%" GST_FOURCC_FORMAT ")",
5512 stream_nr, GST_FOURCC_ARGS (tag));
5513 avi->offset += 8 + GST_ROUND_UP_2 (size);
5514 gst_adapter_flush (avi->adapter, 8 + GST_ROUND_UP_2 (size));
5515 } else {
5516 GstAviStream *stream;
5517 GstClockTime next_ts = 0;
5518 GstBuffer *buf = NULL;
5519 #if 0
5520 guint64 offset;
5521 #endif
5522 gboolean saw_desired_kf = stream_nr != avi->main_stream
5523 || avi->offset >= avi->seek_kf_offset;
5524
5525 if (stream_nr == avi->main_stream && avi->offset == avi->seek_kf_offset) {
5526 GST_DEBUG_OBJECT (avi, "Desired keyframe reached");
5527 avi->seek_kf_offset = 0;
5528 }
5529
5530 if (saw_desired_kf) {
5531 gst_adapter_flush (avi->adapter, 8);
5532 /* get buffer */
5533 if (size) {
5534 buf = gst_adapter_take_buffer (avi->adapter, GST_ROUND_UP_2 (size));
5535 /* patch the size */
5536 gst_buffer_resize (buf, 0, size);
5537 } else {
5538 buf = NULL;
5539 }
5540 } else {
5541 GST_DEBUG_OBJECT (avi,
5542 "Desired keyframe not yet reached, flushing chunk");
5543 gst_adapter_flush (avi->adapter, 8 + GST_ROUND_UP_2 (size));
5544 }
5545
5546 #if 0
5547 offset = avi->offset;
5548 #endif
5549 avi->offset += 8 + GST_ROUND_UP_2 (size);
5550
5551 stream = &avi->stream[stream_nr];
5552
5553 /* set delay (if any)
5554 if (stream->strh->init_frames == stream->current_frame &&
5555 stream->delay == 0)
5556 stream->delay = next_ts;
5557 */
5558
5559 /* parsing of corresponding header may have failed */
5560 if (G_UNLIKELY (!stream->pad)) {
5561 GST_WARNING_OBJECT (avi, "no pad for stream ID %" GST_FOURCC_FORMAT,
5562 GST_FOURCC_ARGS (tag));
5563 if (buf)
5564 gst_buffer_unref (buf);
5565 } else {
5566 /* get time of this buffer */
5567 gst_pad_query_position (stream->pad, GST_FORMAT_TIME,
5568 (gint64 *) & next_ts);
5569
5570 #if 0
5571 gst_avi_demux_add_assoc (avi, stream, next_ts, offset, FALSE);
5572 #endif
5573
5574 /* increment our positions */
5575 stream->current_entry++;
5576 /* as in pull mode, 'total' is either bytes (CBR) or frames (VBR) */
5577 if (stream->strh->type == GST_RIFF_FCC_auds && stream->is_vbr) {
5578 gint blockalign = stream->strf.auds->blockalign;
5579 if (blockalign > 0)
5580 stream->current_total += DIV_ROUND_UP (size, blockalign);
5581 else
5582 stream->current_total++;
5583 } else {
5584 stream->current_total += size;
5585 }
5586 GST_LOG_OBJECT (avi, "current entry %u, total %u",
5587 stream->current_entry, stream->current_total);
5588
5589 /* update current position in the segment */
5590 avi->segment.position = next_ts;
5591
5592 if (saw_desired_kf && buf) {
5593 GstClockTime dur_ts = 0;
5594
5595 /* invert the picture if needed, and append palette for RGB8P */
5596 buf = gst_avi_demux_invert (stream, buf);
5597
5598 gst_pad_query_position (stream->pad, GST_FORMAT_TIME,
5599 (gint64 *) & dur_ts);
5600
5601 GST_BUFFER_DTS (buf) = next_ts;
5602 GST_BUFFER_PTS (buf) = GST_CLOCK_TIME_NONE;
5603 GST_BUFFER_DURATION (buf) = dur_ts - next_ts;
5604 if (stream->strh->type == GST_RIFF_FCC_vids) {
5605 GST_BUFFER_OFFSET (buf) = stream->current_entry - 1;
5606 GST_BUFFER_OFFSET_END (buf) = stream->current_entry;
5607 } else {
5608 GST_BUFFER_OFFSET (buf) = GST_BUFFER_OFFSET_NONE;
5609 GST_BUFFER_OFFSET_END (buf) = GST_BUFFER_OFFSET_NONE;
5610 }
5611
5612 GST_DEBUG_OBJECT (avi,
5613 "Pushing buffer with time=%" GST_TIME_FORMAT ", duration %"
5614 GST_TIME_FORMAT ", offset %" G_GUINT64_FORMAT
5615 " and size %d over pad %s", GST_TIME_ARGS (next_ts),
5616 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)),
5617 GST_BUFFER_OFFSET (buf), size, GST_PAD_NAME (stream->pad));
5618
5619 /* mark discont when pending */
5620 if (G_UNLIKELY (stream->discont)) {
5621 GST_DEBUG_OBJECT (avi, "Setting DISCONT");
5622 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
5623 stream->discont = FALSE;
5624 } else {
5625 GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DISCONT);
5626 }
5627
5628 if (stream->alignment > 1)
5629 buf = gst_avi_demux_align_buffer (avi, buf, stream->alignment);
5630 res = gst_pad_push (stream->pad, buf);
5631 buf = NULL;
5632
5633 /* combine flows */
5634 res = gst_avi_demux_combine_flows (avi, stream, res);
5635 if (G_UNLIKELY (res != GST_FLOW_OK)) {
5636 GST_DEBUG ("Push failed; %s", gst_flow_get_name (res));
5637 return res;
5638 }
5639 }
5640 }
5641 }
5642 }
5643
5644 return res;
5645 }
5646
5647 /*
5648 * Send pending tags.
5649 */
5650 static void
push_tag_lists(GstAviDemux * avi)5651 push_tag_lists (GstAviDemux * avi)
5652 {
5653 guint i;
5654 GstTagList *tags;
5655
5656 if (!avi->got_tags)
5657 return;
5658
5659 GST_DEBUG_OBJECT (avi, "Pushing pending tag lists");
5660
5661 for (i = 0; i < avi->num_streams; i++) {
5662 GstAviStream *stream = &avi->stream[i];
5663 GstPad *pad = stream->pad;
5664
5665 tags = stream->taglist;
5666
5667 if (pad && tags) {
5668 GST_DEBUG_OBJECT (pad, "Tags: %" GST_PTR_FORMAT, tags);
5669
5670 gst_pad_push_event (pad, gst_event_new_tag (tags));
5671 stream->taglist = NULL;
5672 }
5673 }
5674
5675 if (!(tags = avi->globaltags))
5676 tags = gst_tag_list_new_empty ();
5677
5678 gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE,
5679 GST_TAG_CONTAINER_FORMAT, "AVI", NULL);
5680
5681 GST_DEBUG_OBJECT (avi, "Global tags: %" GST_PTR_FORMAT, tags);
5682 gst_tag_list_set_scope (tags, GST_TAG_SCOPE_GLOBAL);
5683 gst_avi_demux_push_event (avi, gst_event_new_tag (tags));
5684 avi->globaltags = NULL;
5685 avi->got_tags = FALSE;
5686 }
5687
5688 static void
gst_avi_demux_loop(GstPad * pad)5689 gst_avi_demux_loop (GstPad * pad)
5690 {
5691 GstFlowReturn res;
5692 GstAviDemux *avi = GST_AVI_DEMUX (GST_PAD_PARENT (pad));
5693
5694 switch (avi->state) {
5695 case GST_AVI_DEMUX_START:
5696 res = gst_avi_demux_stream_init_pull (avi);
5697 if (G_UNLIKELY (res != GST_FLOW_OK)) {
5698 GST_WARNING ("stream_init flow: %s", gst_flow_get_name (res));
5699 goto pause;
5700 }
5701 avi->state = GST_AVI_DEMUX_HEADER;
5702 /* fall-through */
5703 case GST_AVI_DEMUX_HEADER:
5704 res = gst_avi_demux_stream_header_pull (avi);
5705 if (G_UNLIKELY (res != GST_FLOW_OK)) {
5706 GST_WARNING ("stream_header flow: %s", gst_flow_get_name (res));
5707 goto pause;
5708 }
5709 avi->state = GST_AVI_DEMUX_MOVI;
5710 break;
5711 case GST_AVI_DEMUX_MOVI:
5712 if (G_UNLIKELY (avi->seg_event)) {
5713 gst_avi_demux_push_event (avi, avi->seg_event);
5714 avi->seg_event = NULL;
5715 }
5716 if (G_UNLIKELY (avi->got_tags)) {
5717 push_tag_lists (avi);
5718 }
5719 /* process each index entry in turn */
5720 res = gst_avi_demux_loop_data (avi);
5721
5722 /* pause when error */
5723 if (G_UNLIKELY (res != GST_FLOW_OK)) {
5724 GST_INFO ("stream_movi flow: %s", gst_flow_get_name (res));
5725 goto pause;
5726 }
5727 break;
5728 default:
5729 GST_ERROR_OBJECT (avi, "unknown state %d", avi->state);
5730 res = GST_FLOW_ERROR;
5731 goto pause;
5732 }
5733
5734 return;
5735
5736 /* ERRORS */
5737 pause:{
5738
5739 gboolean push_eos = FALSE;
5740 GST_LOG_OBJECT (avi, "pausing task, reason %s", gst_flow_get_name (res));
5741 gst_pad_pause_task (avi->sinkpad);
5742
5743 if (res == GST_FLOW_EOS) {
5744 /* handle end-of-stream/segment */
5745 /* so align our position with the end of it, if there is one
5746 * this ensures a subsequent will arrive at correct base/acc time */
5747 if (avi->segment.rate > 0.0 &&
5748 GST_CLOCK_TIME_IS_VALID (avi->segment.stop))
5749 avi->segment.position = avi->segment.stop;
5750 else if (avi->segment.rate < 0.0)
5751 avi->segment.position = avi->segment.start;
5752 if (avi->segment.flags & GST_SEEK_FLAG_SEGMENT) {
5753 gint64 stop;
5754 GstEvent *event;
5755 GstMessage *msg;
5756
5757 if ((stop = avi->segment.stop) == -1)
5758 stop = avi->segment.duration;
5759
5760 GST_INFO_OBJECT (avi, "sending segment_done");
5761
5762 msg =
5763 gst_message_new_segment_done (GST_OBJECT_CAST (avi),
5764 GST_FORMAT_TIME, stop);
5765 if (avi->segment_seqnum)
5766 gst_message_set_seqnum (msg, avi->segment_seqnum);
5767 gst_element_post_message (GST_ELEMENT_CAST (avi), msg);
5768
5769 event = gst_event_new_segment_done (GST_FORMAT_TIME, stop);
5770 if (avi->segment_seqnum)
5771 gst_event_set_seqnum (event, avi->segment_seqnum);
5772 gst_avi_demux_push_event (avi, event);
5773 } else {
5774 push_eos = TRUE;
5775 }
5776 } else if (res == GST_FLOW_NOT_LINKED || res < GST_FLOW_EOS) {
5777 /* for fatal errors we post an error message, wrong-state is
5778 * not fatal because it happens due to flushes and only means
5779 * that we should stop now. */
5780 GST_ELEMENT_FLOW_ERROR (avi, res);
5781 push_eos = TRUE;
5782 }
5783 if (push_eos) {
5784 GstEvent *event;
5785
5786 GST_INFO_OBJECT (avi, "sending eos");
5787 event = gst_event_new_eos ();
5788 if (avi->segment_seqnum)
5789 gst_event_set_seqnum (event, avi->segment_seqnum);
5790 if (!gst_avi_demux_push_event (avi, event) && (res == GST_FLOW_EOS)) {
5791 GST_ELEMENT_ERROR (avi, STREAM, DEMUX,
5792 (NULL), ("got eos but no streams (yet)"));
5793 }
5794 }
5795 }
5796 }
5797
5798
5799 static GstFlowReturn
gst_avi_demux_chain(GstPad * pad,GstObject * parent,GstBuffer * buf)5800 gst_avi_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
5801 {
5802 GstFlowReturn res;
5803 GstAviDemux *avi = GST_AVI_DEMUX (parent);
5804 gint i;
5805
5806 if (GST_BUFFER_IS_DISCONT (buf)) {
5807 GST_DEBUG_OBJECT (avi, "got DISCONT");
5808 gst_adapter_clear (avi->adapter);
5809 /* mark all streams DISCONT */
5810 for (i = 0; i < avi->num_streams; i++)
5811 avi->stream[i].discont = TRUE;
5812 }
5813
5814 GST_DEBUG ("Store %" G_GSIZE_FORMAT " bytes in adapter",
5815 gst_buffer_get_size (buf));
5816 gst_adapter_push (avi->adapter, buf);
5817
5818 switch (avi->state) {
5819 case GST_AVI_DEMUX_START:
5820 if ((res = gst_avi_demux_stream_init_push (avi)) != GST_FLOW_OK) {
5821 GST_WARNING ("stream_init flow: %s", gst_flow_get_name (res));
5822 break;
5823 }
5824 break;
5825 case GST_AVI_DEMUX_HEADER:
5826 if ((res = gst_avi_demux_stream_header_push (avi)) != GST_FLOW_OK) {
5827 GST_WARNING ("stream_header flow: %s", gst_flow_get_name (res));
5828 break;
5829 }
5830 break;
5831 case GST_AVI_DEMUX_MOVI:
5832 if (G_UNLIKELY (avi->seg_event)) {
5833 gst_avi_demux_push_event (avi, avi->seg_event);
5834 avi->seg_event = NULL;
5835 }
5836 if (G_UNLIKELY (avi->got_tags)) {
5837 push_tag_lists (avi);
5838 }
5839 res = gst_avi_demux_stream_data (avi);
5840 break;
5841 case GST_AVI_DEMUX_SEEK:
5842 {
5843 GstEvent *event;
5844
5845 res = GST_FLOW_OK;
5846
5847 /* obtain and parse indexes */
5848 if (avi->stream[0].indexes && !gst_avi_demux_read_subindexes_push (avi))
5849 /* seek in subindex read function failed */
5850 goto index_failed;
5851
5852 if (!avi->stream[0].indexes && !avi->have_index
5853 && avi->avih->flags & GST_RIFF_AVIH_HASINDEX)
5854 gst_avi_demux_stream_index_push (avi);
5855
5856 if (avi->have_index) {
5857 /* use the indexes now to construct nice durations */
5858 gst_avi_demux_calculate_durations_from_index (avi);
5859 } else {
5860 /* still parsing indexes */
5861 break;
5862 }
5863
5864 GST_OBJECT_LOCK (avi);
5865 event = avi->seek_event;
5866 avi->seek_event = NULL;
5867 GST_OBJECT_UNLOCK (avi);
5868
5869 /* calculate and perform seek */
5870 if (!avi_demux_handle_seek_push (avi, avi->sinkpad, event)) {
5871 gst_event_unref (event);
5872 goto seek_failed;
5873 }
5874
5875 gst_event_unref (event);
5876 avi->state = GST_AVI_DEMUX_MOVI;
5877 break;
5878 }
5879 default:
5880 GST_ELEMENT_ERROR (avi, STREAM, FAILED, (NULL),
5881 ("Illegal internal state"));
5882 res = GST_FLOW_ERROR;
5883 break;
5884 }
5885
5886 GST_DEBUG_OBJECT (avi, "state: %d res:%s", avi->state,
5887 gst_flow_get_name (res));
5888
5889 if (G_UNLIKELY (avi->abort_buffering))
5890 goto abort_buffering;
5891
5892 return res;
5893
5894 /* ERRORS */
5895 index_failed:
5896 {
5897 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("failed to read indexes"));
5898 return GST_FLOW_ERROR;
5899 }
5900 seek_failed:
5901 {
5902 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("push mode seek failed"));
5903 return GST_FLOW_ERROR;
5904 }
5905 abort_buffering:
5906 {
5907 avi->abort_buffering = FALSE;
5908 GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("unhandled buffer size"));
5909 return GST_FLOW_ERROR;
5910 }
5911 }
5912
5913 static gboolean
gst_avi_demux_sink_activate(GstPad * sinkpad,GstObject * parent)5914 gst_avi_demux_sink_activate (GstPad * sinkpad, GstObject * parent)
5915 {
5916 GstQuery *query;
5917 gboolean pull_mode;
5918
5919 query = gst_query_new_scheduling ();
5920
5921 if (!gst_pad_peer_query (sinkpad, query)) {
5922 gst_query_unref (query);
5923 goto activate_push;
5924 }
5925
5926 pull_mode = gst_query_has_scheduling_mode_with_flags (query,
5927 GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);
5928 gst_query_unref (query);
5929
5930 if (!pull_mode)
5931 goto activate_push;
5932
5933 GST_DEBUG_OBJECT (sinkpad, "activating pull");
5934 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);
5935
5936 activate_push:
5937 {
5938 GST_DEBUG_OBJECT (sinkpad, "activating push");
5939 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
5940 }
5941 }
5942
5943 static gboolean
gst_avi_demux_sink_activate_mode(GstPad * sinkpad,GstObject * parent,GstPadMode mode,gboolean active)5944 gst_avi_demux_sink_activate_mode (GstPad * sinkpad, GstObject * parent,
5945 GstPadMode mode, gboolean active)
5946 {
5947 gboolean res;
5948 GstAviDemux *avi = GST_AVI_DEMUX (parent);
5949
5950 switch (mode) {
5951 case GST_PAD_MODE_PULL:
5952 if (active) {
5953 avi->streaming = FALSE;
5954 res = gst_pad_start_task (sinkpad, (GstTaskFunction) gst_avi_demux_loop,
5955 sinkpad, NULL);
5956 } else {
5957 res = gst_pad_stop_task (sinkpad);
5958 }
5959 break;
5960 case GST_PAD_MODE_PUSH:
5961 if (active) {
5962 GST_DEBUG ("avi: activating push/chain function");
5963 avi->streaming = TRUE;
5964 } else {
5965 GST_DEBUG ("avi: deactivating push/chain function");
5966 }
5967 res = TRUE;
5968 break;
5969 default:
5970 res = FALSE;
5971 break;
5972 }
5973 return res;
5974 }
5975
5976 #if 0
5977 static void
5978 gst_avi_demux_set_index (GstElement * element, GstIndex * index)
5979 {
5980 GstAviDemux *avi = GST_AVI_DEMUX (element);
5981
5982 GST_OBJECT_LOCK (avi);
5983 if (avi->element_index)
5984 gst_object_unref (avi->element_index);
5985 if (index) {
5986 avi->element_index = gst_object_ref (index);
5987 } else {
5988 avi->element_index = NULL;
5989 }
5990 GST_OBJECT_UNLOCK (avi);
5991 /* object lock might be taken again */
5992 if (index)
5993 gst_index_get_writer_id (index, GST_OBJECT_CAST (element), &avi->index_id);
5994 GST_DEBUG_OBJECT (avi, "Set index %" GST_PTR_FORMAT, avi->element_index);
5995 }
5996
5997 static GstIndex *
5998 gst_avi_demux_get_index (GstElement * element)
5999 {
6000 GstIndex *result = NULL;
6001 GstAviDemux *avi = GST_AVI_DEMUX (element);
6002
6003 GST_OBJECT_LOCK (avi);
6004 if (avi->element_index)
6005 result = gst_object_ref (avi->element_index);
6006 GST_OBJECT_UNLOCK (avi);
6007
6008 GST_DEBUG_OBJECT (avi, "Returning index %" GST_PTR_FORMAT, result);
6009
6010 return result;
6011 }
6012 #endif
6013
6014 static GstStateChangeReturn
gst_avi_demux_change_state(GstElement * element,GstStateChange transition)6015 gst_avi_demux_change_state (GstElement * element, GstStateChange transition)
6016 {
6017 GstStateChangeReturn ret;
6018 GstAviDemux *avi = GST_AVI_DEMUX (element);
6019
6020 switch (transition) {
6021 case GST_STATE_CHANGE_READY_TO_PAUSED:
6022 avi->streaming = FALSE;
6023 gst_segment_init (&avi->segment, GST_FORMAT_TIME);
6024 break;
6025 default:
6026 break;
6027 }
6028
6029 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
6030 if (ret == GST_STATE_CHANGE_FAILURE)
6031 goto done;
6032
6033 switch (transition) {
6034 case GST_STATE_CHANGE_PAUSED_TO_READY:
6035 avi->have_index = FALSE;
6036 gst_avi_demux_reset (avi);
6037 break;
6038 default:
6039 break;
6040 }
6041
6042 done:
6043 return ret;
6044 }
6045