1 /* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2006> Tim-Philipp Müller <tim centricular net>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21 /**
22 * SECTION:element-auparse
23 *
24 * Parses .au files mostly originating from sun os based computers.
25 */
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <stdlib.h>
32 #include <string.h>
33
34 #include "gstauparse.h"
35 #include <gst/audio/audio.h>
36
37 GST_DEBUG_CATEGORY_STATIC (auparse_debug);
38 #define GST_CAT_DEFAULT (auparse_debug)
39
40 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
41 GST_PAD_SINK,
42 GST_PAD_ALWAYS,
43 GST_STATIC_CAPS ("audio/x-au")
44 );
45
46 #define GST_AU_PARSE_RAW_PAD_TEMPLATE_CAPS \
47 "audio/x-raw, " \
48 "format= (string) { S8, S16LE, S16BE, S24LE, S24BE, " \
49 "S32LE, S32BE, F32LE, F32BE, " \
50 "F64LE, F64BE }, " \
51 "rate = (int) [ 8000, 192000 ], " \
52 "channels = (int) 1, " \
53 "layout = (string) interleaved;" \
54 "audio/x-raw, " \
55 "format= (string) { S8, S16LE, S16BE, S24LE, S24BE, " \
56 "S32LE, S32BE, F32LE, F32BE, " \
57 "F64LE, F64BE }, " \
58 "rate = (int) [ 8000, 192000 ], " \
59 "channels = (int) 2, " \
60 "channel-mask = (bitmask) 0x3," \
61 "layout = (string) interleaved"
62
63 #define GST_AU_PARSE_ALAW_PAD_TEMPLATE_CAPS \
64 "audio/x-alaw, " \
65 "rate = (int) [ 8000, 192000 ], " \
66 "channels = (int) [ 1, 2 ]"
67
68 #define GST_AU_PARSE_MULAW_PAD_TEMPLATE_CAPS \
69 "audio/x-mulaw, " \
70 "rate = (int) [ 8000, 192000 ], " \
71 "channels = (int) [ 1, 2 ]"
72
73 /* Nothing to decode those ADPCM streams for now */
74 #define GST_AU_PARSE_ADPCM_PAD_TEMPLATE_CAPS \
75 "audio/x-adpcm, " \
76 "layout = (string) { g721, g722, g723_3, g723_5 }"
77
78 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
79 GST_PAD_SRC,
80 GST_PAD_ALWAYS,
81 GST_STATIC_CAPS (GST_AU_PARSE_RAW_PAD_TEMPLATE_CAPS "; "
82 GST_AU_PARSE_ALAW_PAD_TEMPLATE_CAPS ";"
83 GST_AU_PARSE_MULAW_PAD_TEMPLATE_CAPS ";"
84 GST_AU_PARSE_ADPCM_PAD_TEMPLATE_CAPS));
85
86
87 static void gst_au_parse_dispose (GObject * object);
88 static GstFlowReturn gst_au_parse_chain (GstPad * pad, GstObject * parent,
89 GstBuffer * buf);
90 static GstStateChangeReturn gst_au_parse_change_state (GstElement * element,
91 GstStateChange transition);
92 static void gst_au_parse_reset (GstAuParse * auparse);
93 static gboolean gst_au_parse_src_query (GstPad * pad, GstObject * parent,
94 GstQuery * query);
95 static gboolean gst_au_parse_src_event (GstPad * pad, GstObject * parent,
96 GstEvent * event);
97 static gboolean gst_au_parse_sink_event (GstPad * pad, GstObject * parent,
98 GstEvent * event);
99 static gboolean gst_au_parse_src_convert (GstAuParse * auparse,
100 GstFormat src_format, gint64 srcval, GstFormat dest_format,
101 gint64 * destval);
102
103 #define gst_au_parse_parent_class parent_class
104 G_DEFINE_TYPE (GstAuParse, gst_au_parse, GST_TYPE_ELEMENT);
105
106 static void
gst_au_parse_class_init(GstAuParseClass * klass)107 gst_au_parse_class_init (GstAuParseClass * klass)
108 {
109 GObjectClass *gobject_class;
110 GstElementClass *gstelement_class;
111
112 GST_DEBUG_CATEGORY_INIT (auparse_debug, "auparse", 0, ".au parser");
113
114 gobject_class = (GObjectClass *) klass;
115 gstelement_class = (GstElementClass *) klass;
116
117 gobject_class->dispose = gst_au_parse_dispose;
118
119 gstelement_class->change_state =
120 GST_DEBUG_FUNCPTR (gst_au_parse_change_state);
121 gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
122 gst_element_class_add_static_pad_template (gstelement_class, &src_template);
123 gst_element_class_set_static_metadata (gstelement_class,
124 "AU audio demuxer",
125 "Codec/Demuxer/Audio",
126 "Parse an .au file into raw audio",
127 "Erik Walthinsen <omega@cse.ogi.edu>");
128 }
129
130 static void
gst_au_parse_init(GstAuParse * auparse)131 gst_au_parse_init (GstAuParse * auparse)
132 {
133 auparse->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
134 gst_pad_set_chain_function (auparse->sinkpad,
135 GST_DEBUG_FUNCPTR (gst_au_parse_chain));
136 gst_pad_set_event_function (auparse->sinkpad,
137 GST_DEBUG_FUNCPTR (gst_au_parse_sink_event));
138 gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
139
140 auparse->srcpad = gst_pad_new_from_static_template (&src_template, "src");
141 gst_pad_set_query_function (auparse->srcpad,
142 GST_DEBUG_FUNCPTR (gst_au_parse_src_query));
143 gst_pad_set_event_function (auparse->srcpad,
144 GST_DEBUG_FUNCPTR (gst_au_parse_src_event));
145 gst_pad_use_fixed_caps (auparse->srcpad);
146 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
147
148 auparse->adapter = gst_adapter_new ();
149 gst_au_parse_reset (auparse);
150 }
151
152 static void
gst_au_parse_dispose(GObject * object)153 gst_au_parse_dispose (GObject * object)
154 {
155 GstAuParse *au = GST_AU_PARSE (object);
156
157 if (au->adapter != NULL) {
158 g_object_unref (au->adapter);
159 au->adapter = NULL;
160 }
161 G_OBJECT_CLASS (parent_class)->dispose (object);
162 }
163
164 static void
gst_au_parse_reset(GstAuParse * auparse)165 gst_au_parse_reset (GstAuParse * auparse)
166 {
167 auparse->offset = 0;
168 auparse->buffer_offset = 0;
169 auparse->encoding = 0;
170 auparse->samplerate = 0;
171 auparse->channels = 0;
172
173 gst_adapter_clear (auparse->adapter);
174
175 gst_caps_replace (&auparse->src_caps, NULL);
176
177 /* gst_segment_init (&auparse->segment, GST_FORMAT_TIME); */
178 }
179
180 static void
gst_au_parse_negotiate_srcpad(GstAuParse * auparse,GstCaps * new_caps)181 gst_au_parse_negotiate_srcpad (GstAuParse * auparse, GstCaps * new_caps)
182 {
183 if (auparse->src_caps && gst_caps_is_equal (new_caps, auparse->src_caps)) {
184 GST_LOG_OBJECT (auparse, "same caps, nothing to do");
185 return;
186 }
187
188 gst_caps_replace (&auparse->src_caps, new_caps);
189 GST_DEBUG_OBJECT (auparse, "Changing src pad caps to %" GST_PTR_FORMAT,
190 auparse->src_caps);
191 gst_pad_set_caps (auparse->srcpad, auparse->src_caps);
192
193 return;
194 }
195
196 static GstFlowReturn
gst_au_parse_parse_header(GstAuParse * auparse)197 gst_au_parse_parse_header (GstAuParse * auparse)
198 {
199 GstCaps *tempcaps;
200 guint32 size;
201 guint8 *head;
202 gchar layout[7] = { 0, };
203 GstAudioFormat format = GST_AUDIO_FORMAT_UNKNOWN;
204 gint law = 0;
205 guint endianness;
206
207 head = (guint8 *) gst_adapter_map (auparse->adapter, 24);
208 g_assert (head != NULL);
209
210 GST_DEBUG_OBJECT (auparse, "[%c%c%c%c]", head[0], head[1], head[2], head[3]);
211
212 switch (GST_READ_UINT32_BE (head)) {
213 /* normal format is big endian (au is a Sparc format) */
214 case 0x2e736e64:{ /* ".snd" */
215 endianness = G_BIG_ENDIAN;
216 break;
217 }
218 /* and of course, someone had to invent a little endian
219 * version. Used by DEC systems. */
220 case 0x646e732e: /* dns. */
221 case 0x0064732e:{ /* other source say it is "dns." */
222 endianness = G_LITTLE_ENDIAN;
223 break;
224 }
225 default:{
226 goto unknown_header;
227 }
228 }
229
230 auparse->offset = GST_READ_UINT32_BE (head + 4);
231 /* Do not trust size, could be set to -1 : unknown
232 * otherwise: filesize = size + auparse->offset
233 */
234 size = GST_READ_UINT32_BE (head + 8);
235 auparse->encoding = GST_READ_UINT32_BE (head + 12);
236 auparse->samplerate = GST_READ_UINT32_BE (head + 16);
237 auparse->channels = GST_READ_UINT32_BE (head + 20);
238
239 if (auparse->samplerate < 8000 || auparse->samplerate > 192000)
240 goto unsupported_sample_rate;
241
242 if (auparse->channels < 1 || auparse->channels > 2)
243 goto unsupported_number_of_channels;
244
245 GST_DEBUG_OBJECT (auparse, "offset %" G_GINT64_FORMAT ", size %u, "
246 "encoding %u, frequency %u, channels %u", auparse->offset, size,
247 auparse->encoding, auparse->samplerate, auparse->channels);
248
249 /* Docs:
250 * http://www.opengroup.org/public/pubs/external/auformat.html
251 * http://astronomy.swin.edu.au/~pbourke/dataformats/au/
252 * Solaris headers : /usr/include/audio/au.h
253 * libsndfile : src/au.c
254 *
255 * Samples :
256 * http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/AU/Samples.html
257 */
258
259 switch (auparse->encoding) {
260 case 1: /* 8-bit ISDN mu-law G.711 */
261 law = 1;
262 break;
263 case 27: /* 8-bit ISDN A-law G.711 */
264 law = 2;
265 break;
266
267 case 2: /* 8-bit linear PCM, FIXME signed? */
268 format = GST_AUDIO_FORMAT_S8;
269 auparse->sample_size = auparse->channels;
270 break;
271 case 3: /* 16-bit linear PCM */
272 if (endianness == G_LITTLE_ENDIAN)
273 format = GST_AUDIO_FORMAT_S16LE;
274 else
275 format = GST_AUDIO_FORMAT_S16BE;
276 auparse->sample_size = auparse->channels * 2;
277 break;
278 case 4: /* 24-bit linear PCM */
279 if (endianness == G_LITTLE_ENDIAN)
280 format = GST_AUDIO_FORMAT_S24LE;
281 else
282 format = GST_AUDIO_FORMAT_S24BE;
283 auparse->sample_size = auparse->channels * 3;
284 break;
285 case 5: /* 32-bit linear PCM */
286 if (endianness == G_LITTLE_ENDIAN)
287 format = GST_AUDIO_FORMAT_S32LE;
288 else
289 format = GST_AUDIO_FORMAT_S32BE;
290 auparse->sample_size = auparse->channels * 4;
291 break;
292
293 case 6: /* 32-bit IEEE floating point */
294 if (endianness == G_LITTLE_ENDIAN)
295 format = GST_AUDIO_FORMAT_F32LE;
296 else
297 format = GST_AUDIO_FORMAT_F32BE;
298 auparse->sample_size = auparse->channels * 4;
299 break;
300 case 7: /* 64-bit IEEE floating point */
301 if (endianness == G_LITTLE_ENDIAN)
302 format = GST_AUDIO_FORMAT_F64LE;
303 else
304 format = GST_AUDIO_FORMAT_F64BE;
305 auparse->sample_size = auparse->channels * 8;
306 break;
307
308 case 23: /* 4-bit CCITT G.721 ADPCM 32kbps -> modplug/libsndfile (compressed 8-bit mu-law) */
309 strcpy (layout, "g721");
310 break;
311 case 24: /* 8-bit CCITT G.722 ADPCM -> rtp */
312 strcpy (layout, "g722");
313 break;
314 case 25: /* 3-bit CCITT G.723.3 ADPCM 24kbps -> rtp/xine/modplug/libsndfile */
315 strcpy (layout, "g723_3");
316 break;
317 case 26: /* 5-bit CCITT G.723.5 ADPCM 40kbps -> rtp/xine/modplug/libsndfile */
318 strcpy (layout, "g723_5");
319 break;
320
321 case 8: /* Fragmented sample data */
322 case 9: /* AU_ENCODING_NESTED */
323
324 case 10: /* DSP program */
325 case 11: /* DSP 8-bit fixed point */
326 case 12: /* DSP 16-bit fixed point */
327 case 13: /* DSP 24-bit fixed point */
328 case 14: /* DSP 32-bit fixed point */
329
330 case 16: /* AU_ENCODING_DISPLAY : non-audio display data */
331 case 17: /* AU_ENCODING_MULAW_SQUELCH */
332
333 case 18: /* 16-bit linear with emphasis */
334 case 19: /* 16-bit linear compressed (NeXT) */
335 case 20: /* 16-bit linear with emphasis and compression */
336
337 case 21: /* Music kit DSP commands */
338 case 22: /* Music kit DSP commands samples */
339
340 default:
341 goto unknown_format;
342 }
343
344 if (law) {
345 tempcaps =
346 gst_caps_new_simple ((law == 1) ? "audio/x-mulaw" : "audio/x-alaw",
347 "rate", G_TYPE_INT, auparse->samplerate,
348 "channels", G_TYPE_INT, auparse->channels, NULL);
349 auparse->sample_size = auparse->channels;
350 } else if (format != GST_AUDIO_FORMAT_UNKNOWN) {
351 GstCaps *templ_caps = gst_pad_get_pad_template_caps (auparse->srcpad);
352 GstCaps *intersection;
353
354 tempcaps = gst_caps_new_simple ("audio/x-raw",
355 "format", G_TYPE_STRING, gst_audio_format_to_string (format),
356 "rate", G_TYPE_INT, auparse->samplerate,
357 "channels", G_TYPE_INT, auparse->channels, NULL);
358
359 intersection = gst_caps_intersect (tempcaps, templ_caps);
360 gst_caps_unref (tempcaps);
361 gst_caps_unref (templ_caps);
362 tempcaps = intersection;
363 } else if (layout[0]) {
364 tempcaps = gst_caps_new_simple ("audio/x-adpcm",
365 "layout", G_TYPE_STRING, layout, NULL);
366 auparse->sample_size = 0;
367 } else
368 goto unknown_format;
369
370 GST_DEBUG_OBJECT (auparse, "sample_size=%d", auparse->sample_size);
371
372 gst_au_parse_negotiate_srcpad (auparse, tempcaps);
373
374 GST_DEBUG_OBJECT (auparse, "offset=%" G_GINT64_FORMAT, auparse->offset);
375 gst_adapter_unmap (auparse->adapter);
376 gst_adapter_flush (auparse->adapter, auparse->offset);
377
378 gst_caps_unref (tempcaps);
379 return GST_FLOW_OK;
380
381 /* ERRORS */
382 unknown_header:
383 {
384 gst_adapter_unmap (auparse->adapter);
385 GST_ELEMENT_ERROR (auparse, STREAM, WRONG_TYPE, (NULL), (NULL));
386 return GST_FLOW_ERROR;
387 }
388 unsupported_sample_rate:
389 {
390 gst_adapter_unmap (auparse->adapter);
391 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL),
392 ("Unsupported samplerate: %u", auparse->samplerate));
393 return GST_FLOW_ERROR;
394 }
395 unsupported_number_of_channels:
396 {
397 gst_adapter_unmap (auparse->adapter);
398 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL),
399 ("Unsupported number of channels: %u", auparse->channels));
400 return GST_FLOW_ERROR;
401 }
402 unknown_format:
403 {
404 gst_adapter_unmap (auparse->adapter);
405 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL),
406 ("Unsupported encoding: %u", auparse->encoding));
407 return GST_FLOW_ERROR;
408 }
409 }
410
411 #define AU_HEADER_SIZE 24
412
413 static GstFlowReturn
gst_au_parse_chain(GstPad * pad,GstObject * parent,GstBuffer * buf)414 gst_au_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
415 {
416 GstFlowReturn ret = GST_FLOW_OK;
417 GstAuParse *auparse;
418 gint avail, sendnow = 0;
419 gint64 timestamp;
420 gint64 duration;
421 gint64 offset;
422
423 auparse = GST_AU_PARSE (parent);
424
425 GST_LOG_OBJECT (auparse, "got buffer of size %" G_GSIZE_FORMAT,
426 gst_buffer_get_size (buf));
427
428 gst_adapter_push (auparse->adapter, buf);
429 buf = NULL;
430
431 /* if we haven't seen any data yet... */
432 if (!gst_pad_has_current_caps (auparse->srcpad)) {
433 if (gst_adapter_available (auparse->adapter) < AU_HEADER_SIZE) {
434 GST_DEBUG_OBJECT (auparse, "need more data to parse header");
435 ret = GST_FLOW_OK;
436 goto out;
437 }
438
439 ret = gst_au_parse_parse_header (auparse);
440 if (ret != GST_FLOW_OK)
441 goto out;
442
443 if (auparse->need_segment) {
444 gst_pad_push_event (auparse->srcpad,
445 gst_event_new_segment (&auparse->segment));
446 auparse->need_segment = FALSE;
447 }
448 }
449
450 avail = gst_adapter_available (auparse->adapter);
451
452 if (auparse->sample_size > 0) {
453 /* Ensure we push a buffer that's a multiple of the frame size downstream */
454 sendnow = avail - (avail % auparse->sample_size);
455 } else {
456 /* It's something non-trivial (such as ADPCM), we don't understand it, so
457 * just push downstream and assume it will know what to do with it */
458 sendnow = avail;
459 }
460
461 if (sendnow > 0) {
462 GstBuffer *outbuf;
463 gint64 pos;
464
465 outbuf = gst_adapter_take_buffer (auparse->adapter, sendnow);
466 outbuf = gst_buffer_make_writable (outbuf);
467
468 pos = auparse->buffer_offset - auparse->offset;
469 pos = MAX (pos, 0);
470
471 if (auparse->sample_size > 0 && auparse->samplerate > 0) {
472 gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, pos,
473 GST_FORMAT_DEFAULT, &offset);
474 gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, pos,
475 GST_FORMAT_TIME, ×tamp);
476 gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES,
477 sendnow, GST_FORMAT_TIME, &duration);
478
479 GST_BUFFER_OFFSET (outbuf) = offset;
480 GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
481 GST_BUFFER_DURATION (outbuf) = duration;
482 }
483
484 auparse->buffer_offset += sendnow;
485
486 ret = gst_pad_push (auparse->srcpad, outbuf);
487 }
488
489 out:
490
491 return ret;
492 }
493
494 static gboolean
gst_au_parse_src_convert(GstAuParse * auparse,GstFormat src_format,gint64 srcval,GstFormat dest_format,gint64 * destval)495 gst_au_parse_src_convert (GstAuParse * auparse, GstFormat src_format,
496 gint64 srcval, GstFormat dest_format, gint64 * destval)
497 {
498 gboolean ret = TRUE;
499 guint samplesize, rate;
500
501 if (dest_format == src_format) {
502 *destval = srcval;
503 return TRUE;
504 }
505
506 GST_OBJECT_LOCK (auparse);
507 samplesize = auparse->sample_size;
508 rate = auparse->samplerate;
509 GST_OBJECT_UNLOCK (auparse);
510
511 if (samplesize == 0 || rate == 0) {
512 GST_LOG_OBJECT (auparse, "cannot convert, sample_size or rate unknown");
513 return FALSE;
514 }
515
516 switch (src_format) {
517 case GST_FORMAT_BYTES:
518 srcval /= samplesize;
519 /* fallthrough */
520 case GST_FORMAT_DEFAULT:{
521 switch (dest_format) {
522 case GST_FORMAT_DEFAULT:
523 *destval = srcval;
524 break;
525 case GST_FORMAT_BYTES:
526 *destval = srcval * samplesize;
527 break;
528 case GST_FORMAT_TIME:
529 *destval = gst_util_uint64_scale_int (srcval, GST_SECOND, rate);
530 break;
531 default:
532 ret = FALSE;
533 break;
534 }
535 break;
536 }
537 case GST_FORMAT_TIME:{
538 switch (dest_format) {
539 case GST_FORMAT_BYTES:
540 *destval = samplesize *
541 gst_util_uint64_scale_int (srcval, rate, GST_SECOND);
542 break;
543 case GST_FORMAT_DEFAULT:
544 *destval = gst_util_uint64_scale_int (srcval, rate, GST_SECOND);
545 break;
546 default:
547 ret = FALSE;
548 break;
549 }
550 break;
551 }
552 default:{
553 ret = FALSE;
554 break;
555 }
556 }
557
558 if (!ret) {
559 GST_DEBUG_OBJECT (auparse, "could not convert from %s to %s format",
560 gst_format_get_name (src_format), gst_format_get_name (dest_format));
561 }
562
563 return ret;
564 }
565
566 static gboolean
gst_au_parse_src_query(GstPad * pad,GstObject * parent,GstQuery * query)567 gst_au_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
568 {
569 GstAuParse *auparse;
570 gboolean ret = FALSE;
571
572 auparse = GST_AU_PARSE (parent);
573
574 switch (GST_QUERY_TYPE (query)) {
575 case GST_QUERY_DURATION:{
576 GstFormat format;
577 gint64 len, val;
578
579 gst_query_parse_duration (query, &format, NULL);
580 if (!gst_pad_peer_query_duration (auparse->sinkpad, GST_FORMAT_BYTES,
581 &len)) {
582 GST_DEBUG_OBJECT (auparse, "failed to query upstream length");
583 break;
584 }
585 GST_OBJECT_LOCK (auparse);
586 len -= auparse->offset;
587 GST_OBJECT_UNLOCK (auparse);
588
589 ret =
590 gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, len, format,
591 &val);
592
593 if (ret) {
594 gst_query_set_duration (query, format, val);
595 }
596 break;
597 }
598 case GST_QUERY_POSITION:{
599 GstFormat format;
600 gint64 pos, val;
601
602 gst_query_parse_position (query, &format, NULL);
603 if (!gst_pad_peer_query_position (auparse->sinkpad, GST_FORMAT_BYTES,
604 &pos)) {
605 GST_DEBUG_OBJECT (auparse, "failed to query upstream position");
606 break;
607 }
608 GST_OBJECT_LOCK (auparse);
609 pos -= auparse->offset;
610 GST_OBJECT_UNLOCK (auparse);
611
612 ret = gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, pos,
613 format, &val);
614
615 if (ret) {
616 gst_query_set_position (query, format, val);
617 }
618 break;
619 }
620 case GST_QUERY_SEEKING:{
621 GstFormat format;
622
623 gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
624 /* FIXME: query duration in 'format'
625 gst_query_set_seeking (query, format, TRUE, 0, duration);
626 */
627 gst_query_set_seeking (query, format, TRUE, 0, GST_CLOCK_TIME_NONE);
628 ret = TRUE;
629 break;
630 }
631 default:
632 ret = gst_pad_query_default (pad, parent, query);
633 break;
634 }
635
636 return ret;
637 }
638
639 static gboolean
gst_au_parse_handle_seek(GstAuParse * auparse,GstEvent * event)640 gst_au_parse_handle_seek (GstAuParse * auparse, GstEvent * event)
641 {
642 GstSeekType start_type, stop_type;
643 GstSeekFlags flags;
644 GstFormat format;
645 gdouble rate;
646 gint64 start, stop;
647 gboolean res;
648
649 gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
650 &stop_type, &stop);
651
652 if (format != GST_FORMAT_TIME) {
653 GST_DEBUG_OBJECT (auparse, "only support seeks in TIME format");
654 return FALSE;
655 }
656
657 res = gst_au_parse_src_convert (auparse, GST_FORMAT_TIME, start,
658 GST_FORMAT_BYTES, &start);
659
660 if (stop > 0) {
661 res = gst_au_parse_src_convert (auparse, GST_FORMAT_TIME, stop,
662 GST_FORMAT_BYTES, &stop);
663 }
664
665 GST_INFO_OBJECT (auparse,
666 "seeking: %" G_GINT64_FORMAT " ... %" G_GINT64_FORMAT, start, stop);
667
668 event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags, start_type, start,
669 stop_type, stop);
670 res = gst_pad_push_event (auparse->sinkpad, event);
671 return res;
672 }
673
674 static gboolean
gst_au_parse_sink_event(GstPad * pad,GstObject * parent,GstEvent * event)675 gst_au_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
676 {
677 GstAuParse *auparse;
678 gboolean ret = TRUE;
679
680 auparse = GST_AU_PARSE (parent);
681
682 switch (GST_EVENT_TYPE (event)) {
683 case GST_EVENT_CAPS:
684 {
685 /* discard, we'll come up with proper src caps */
686 gst_event_unref (event);
687 break;
688 }
689 case GST_EVENT_SEGMENT:
690 {
691 gint64 start, stop, offset = 0;
692 GstSegment segment;
693
694 /* some debug output */
695 gst_event_copy_segment (event, &segment);
696 GST_DEBUG_OBJECT (auparse, "received newsegment %" GST_SEGMENT_FORMAT,
697 &segment);
698
699 start = segment.start;
700 stop = segment.stop;
701 if (auparse->sample_size > 0) {
702 if (start > 0) {
703 offset = start;
704 start -= auparse->offset;
705 start = MAX (start, 0);
706 }
707 if (stop > 0) {
708 stop -= auparse->offset;
709 stop = MAX (stop, 0);
710 }
711 gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, start,
712 GST_FORMAT_TIME, &start);
713 gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, stop,
714 GST_FORMAT_TIME, &stop);
715 }
716
717 GST_INFO_OBJECT (auparse,
718 "new segment: %" GST_TIME_FORMAT " ... %" GST_TIME_FORMAT,
719 GST_TIME_ARGS (start), GST_TIME_ARGS (stop));
720
721 gst_segment_init (&segment, GST_FORMAT_TIME);
722 segment.start = segment.time = start;
723 segment.stop = stop;
724
725 gst_segment_copy_into (&segment, &auparse->segment);
726
727 if (!gst_pad_has_current_caps (auparse->srcpad)) {
728 auparse->need_segment = TRUE;
729 ret = TRUE;
730 } else {
731 auparse->need_segment = FALSE;
732 ret = gst_pad_push_event (auparse->srcpad,
733 gst_event_new_segment (&segment));
734 }
735
736 auparse->buffer_offset = offset;
737
738 gst_event_unref (event);
739 break;
740 }
741 case GST_EVENT_EOS:
742 if (!auparse->srcpad) {
743 GST_ELEMENT_ERROR (auparse, STREAM, WRONG_TYPE,
744 ("No valid input found before end of stream"), (NULL));
745 }
746 /* fall-through */
747 default:
748 ret = gst_pad_event_default (pad, parent, event);
749 break;
750 }
751
752 return ret;
753 }
754
755 static gboolean
gst_au_parse_src_event(GstPad * pad,GstObject * parent,GstEvent * event)756 gst_au_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
757 {
758 GstAuParse *auparse;
759 gboolean ret;
760
761 auparse = GST_AU_PARSE (parent);
762
763 switch (GST_EVENT_TYPE (event)) {
764 case GST_EVENT_SEEK:
765 ret = gst_au_parse_handle_seek (auparse, event);
766 gst_event_unref (event);
767 break;
768 default:
769 ret = gst_pad_event_default (pad, parent, event);
770 break;
771 }
772
773 return ret;
774 }
775
776 static GstStateChangeReturn
gst_au_parse_change_state(GstElement * element,GstStateChange transition)777 gst_au_parse_change_state (GstElement * element, GstStateChange transition)
778 {
779 GstAuParse *auparse = GST_AU_PARSE (element);
780 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
781
782 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
783 if (ret == GST_STATE_CHANGE_FAILURE)
784 return ret;
785
786 switch (transition) {
787 case GST_STATE_CHANGE_PAUSED_TO_READY:
788 gst_au_parse_reset (auparse);
789 default:
790 break;
791 }
792
793 return ret;
794 }
795
796 static gboolean
plugin_init(GstPlugin * plugin)797 plugin_init (GstPlugin * plugin)
798 {
799 if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
800 GST_TYPE_AU_PARSE)) {
801 return FALSE;
802 }
803
804 return TRUE;
805 }
806
807 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
808 GST_VERSION_MINOR,
809 auparse,
810 "parses au streams", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,
811 GST_PACKAGE_ORIGIN)
812