1 /*
2 * GXF muxer.
3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avassert.h"
23 #include "libavutil/intfloat.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/mathematics.h"
26 #include "libavutil/timecode.h"
27 #include "avformat.h"
28 #include "internal.h"
29 #include "gxf.h"
30 #include "audiointerleave.h"
31
32 #define GXF_AUDIO_PACKET_SIZE 65536
33
34 #define GXF_TIMECODE(c, d, h, m, s, f) \
35 ((c) << 30 | (d) << 29 | (h) << 24 | (m) << 16 | (s) << 8 | (f))
36
37 typedef struct GXFTimecode{
38 int hh;
39 int mm;
40 int ss;
41 int ff;
42 int color;
43 int drop;
44 } GXFTimecode;
45
46 typedef struct GXFStreamContext {
47 AudioInterleaveContext aic;
48 uint32_t track_type;
49 uint32_t sample_size;
50 uint32_t sample_rate;
51 uint16_t media_type;
52 uint16_t media_info;
53 int frame_rate_index;
54 int lines_index;
55 int fields;
56 int iframes;
57 int pframes;
58 int bframes;
59 int p_per_gop;
60 int b_per_i_or_p; ///< number of B frames per I frame or P frame
61 int first_gop_closed;
62 unsigned order; ///< interleaving order
63 } GXFStreamContext;
64
65 typedef struct GXFContext {
66 AVClass *av_class;
67 uint32_t nb_fields;
68 uint16_t audio_tracks;
69 uint16_t mpeg_tracks;
70 int64_t creation_time;
71 uint32_t umf_start_offset;
72 uint32_t umf_track_offset;
73 uint32_t umf_media_offset;
74 uint32_t umf_length;
75 uint16_t umf_track_size;
76 uint16_t umf_media_size;
77 AVRational time_base;
78 int flags;
79 GXFStreamContext timecode_track;
80 unsigned *flt_entries; ///< offsets of packets /1024, starts after 2nd video field
81 unsigned flt_entries_nb;
82 uint64_t *map_offsets; ///< offset of map packets
83 unsigned map_offsets_nb;
84 unsigned packet_count;
85 GXFTimecode tc;
86 } GXFContext;
87
88 static const struct {
89 int height, index;
90 } gxf_lines_tab[] = {
91 { 480, 1 }, /* NTSC */
92 { 512, 1 }, /* NTSC + VBI */
93 { 576, 2 }, /* PAL */
94 { 608, 2 }, /* PAL + VBI */
95 { 1080, 4 },
96 { 720, 6 },
97 };
98
99 static const AVCodecTag gxf_media_types[] = {
100 { AV_CODEC_ID_MJPEG , 3 }, /* NTSC */
101 { AV_CODEC_ID_MJPEG , 4 }, /* PAL */
102 { AV_CODEC_ID_PCM_S24LE , 9 },
103 { AV_CODEC_ID_PCM_S16LE , 10 },
104 { AV_CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */
105 { AV_CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */
106 { AV_CODEC_ID_DVVIDEO , 13 }, /* NTSC */
107 { AV_CODEC_ID_DVVIDEO , 14 }, /* PAL */
108 { AV_CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */
109 { AV_CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */
110 { AV_CODEC_ID_AC3 , 17 },
111 //{ AV_CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */
112 { AV_CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */
113 { AV_CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */
114 { AV_CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */
115 { AV_CODEC_ID_NONE, 0 },
116 };
117
118 #define SERVER_PATH "EXT:/PDR/default/"
119 #define ES_NAME_PATTERN "EXT:/PDR/default/ES."
120
gxf_find_lines_index(AVStream * st)121 static int gxf_find_lines_index(AVStream *st)
122 {
123 GXFStreamContext *sc = st->priv_data;
124 int i;
125
126 for (i = 0; i < 6; ++i) {
127 if (st->codec->height == gxf_lines_tab[i].height) {
128 sc->lines_index = gxf_lines_tab[i].index;
129 return 0;
130 }
131 }
132 return -1;
133 }
134
gxf_write_padding(AVIOContext * pb,int64_t to_pad)135 static void gxf_write_padding(AVIOContext *pb, int64_t to_pad)
136 {
137 for (; to_pad > 0; to_pad--) {
138 avio_w8(pb, 0);
139 }
140 }
141
updatePacketSize(AVIOContext * pb,int64_t pos)142 static int64_t updatePacketSize(AVIOContext *pb, int64_t pos)
143 {
144 int64_t curpos;
145 int size;
146
147 size = avio_tell(pb) - pos;
148 if (size % 4) {
149 gxf_write_padding(pb, 4 - size % 4);
150 size = avio_tell(pb) - pos;
151 }
152 curpos = avio_tell(pb);
153 avio_seek(pb, pos + 6, SEEK_SET);
154 avio_wb32(pb, size);
155 avio_seek(pb, curpos, SEEK_SET);
156 return curpos - pos;
157 }
158
updateSize(AVIOContext * pb,int64_t pos)159 static int64_t updateSize(AVIOContext *pb, int64_t pos)
160 {
161 int64_t curpos;
162
163 curpos = avio_tell(pb);
164 avio_seek(pb, pos, SEEK_SET);
165 avio_wb16(pb, curpos - pos - 2);
166 avio_seek(pb, curpos, SEEK_SET);
167 return curpos - pos;
168 }
169
gxf_write_packet_header(AVIOContext * pb,GXFPktType type)170 static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type)
171 {
172 avio_wb32(pb, 0); /* packet leader for synchro */
173 avio_w8(pb, 1);
174 avio_w8(pb, type); /* map packet */
175 avio_wb32(pb, 0); /* size */
176 avio_wb32(pb, 0); /* reserved */
177 avio_w8(pb, 0xE1); /* trailer 1 */
178 avio_w8(pb, 0xE2); /* trailer 2 */
179 }
180
gxf_write_mpeg_auxiliary(AVIOContext * pb,AVStream * st)181 static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st)
182 {
183 GXFStreamContext *sc = st->priv_data;
184 char buffer[1024];
185 int size, starting_line;
186
187 if (sc->iframes) {
188 sc->p_per_gop = sc->pframes / sc->iframes;
189 if (sc->pframes % sc->iframes)
190 sc->p_per_gop++;
191 if (sc->pframes) {
192 sc->b_per_i_or_p = sc->bframes / sc->pframes;
193 if (sc->bframes % sc->pframes)
194 sc->b_per_i_or_p++;
195 }
196 if (sc->p_per_gop > 9)
197 sc->p_per_gop = 9; /* ensure value won't take more than one char */
198 if (sc->b_per_i_or_p > 9)
199 sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */
200 }
201 if (st->codec->height == 512 || st->codec->height == 608)
202 starting_line = 7; // VBI
203 else if (st->codec->height == 480)
204 starting_line = 20;
205 else
206 starting_line = 23; // default PAL
207
208 size = snprintf(buffer, sizeof(buffer), "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
209 "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n",
210 (float)st->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
211 st->codec->pix_fmt == AV_PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
212 starting_line, (st->codec->height + 15) / 16);
213 av_assert0(size < sizeof(buffer));
214 avio_w8(pb, TRACK_MPG_AUX);
215 avio_w8(pb, size + 1);
216 avio_write(pb, (uint8_t *)buffer, size + 1);
217 return size + 3;
218 }
219
gxf_write_dv_auxiliary(AVIOContext * pb,AVStream * st)220 static int gxf_write_dv_auxiliary(AVIOContext *pb, AVStream *st)
221 {
222 int64_t track_aux_data = 0;
223
224 avio_w8(pb, TRACK_AUX);
225 avio_w8(pb, 8);
226 if (st->codec->pix_fmt == AV_PIX_FMT_YUV420P)
227 track_aux_data |= 0x01; /* marks stream as DVCAM instead of DVPRO */
228 track_aux_data |= 0x40000000; /* aux data is valid */
229 avio_wl64(pb, track_aux_data);
230 return 8;
231 }
232
gxf_write_timecode_auxiliary(AVIOContext * pb,GXFContext * gxf)233 static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf)
234 {
235 uint32_t timecode = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
236 gxf->tc.hh, gxf->tc.mm,
237 gxf->tc.ss, gxf->tc.ff);
238
239 avio_w8(pb, TRACK_AUX);
240 avio_w8(pb, 8);
241 avio_wl32(pb, timecode);
242 /* reserved */
243 avio_wl32(pb, 0);
244 return 8;
245 }
246
gxf_write_track_description(AVFormatContext * s,GXFStreamContext * sc,int index)247 static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
248 {
249 GXFContext *gxf = s->priv_data;
250 AVIOContext *pb = s->pb;
251 int64_t pos;
252
253 /* track description section */
254 avio_w8(pb, sc->media_type + 0x80);
255 avio_w8(pb, index + 0xC0);
256
257 pos = avio_tell(pb);
258 avio_wb16(pb, 0); /* size */
259
260 /* media file name */
261 avio_w8(pb, TRACK_NAME);
262 avio_w8(pb, strlen(ES_NAME_PATTERN) + 3);
263 avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1);
264 avio_wb16(pb, sc->media_info);
265 avio_w8(pb, 0);
266
267 switch (sc->track_type) {
268 case 3: /* timecode */
269 gxf_write_timecode_auxiliary(pb, gxf);
270 break;
271 case 4: /* MPEG2 */
272 case 9: /* MPEG1 */
273 gxf_write_mpeg_auxiliary(pb, s->streams[index]);
274 break;
275 case 5: /* DV25 */
276 case 6: /* DV50 */
277 gxf_write_dv_auxiliary(pb, s->streams[index]);
278 break;
279 default:
280 avio_w8(pb, TRACK_AUX);
281 avio_w8(pb, 8);
282 avio_wl64(pb, 0);
283 }
284
285 /* file system version */
286 avio_w8(pb, TRACK_VER);
287 avio_w8(pb, 4);
288 avio_wb32(pb, 0);
289
290 /* frame rate */
291 avio_w8(pb, TRACK_FPS);
292 avio_w8(pb, 4);
293 avio_wb32(pb, sc->frame_rate_index);
294
295 /* lines per frame */
296 avio_w8(pb, TRACK_LINES);
297 avio_w8(pb, 4);
298 avio_wb32(pb, sc->lines_index);
299
300 /* fields per frame */
301 avio_w8(pb, TRACK_FPF);
302 avio_w8(pb, 4);
303 avio_wb32(pb, sc->fields);
304
305 return updateSize(pb, pos);
306 }
307
gxf_write_material_data_section(AVFormatContext * s)308 static int gxf_write_material_data_section(AVFormatContext *s)
309 {
310 GXFContext *gxf = s->priv_data;
311 AVIOContext *pb = s->pb;
312 int64_t pos;
313 int len;
314 const char *filename = strrchr(s->filename, '/');
315
316 pos = avio_tell(pb);
317 avio_wb16(pb, 0); /* size */
318
319 /* name */
320 if (filename)
321 filename++;
322 else
323 filename = s->filename;
324 len = strlen(filename);
325
326 avio_w8(pb, MAT_NAME);
327 avio_w8(pb, strlen(SERVER_PATH) + len + 1);
328 avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
329 avio_write(pb, filename, len);
330 avio_w8(pb, 0);
331
332 /* first field */
333 avio_w8(pb, MAT_FIRST_FIELD);
334 avio_w8(pb, 4);
335 avio_wb32(pb, 0);
336
337 /* last field */
338 avio_w8(pb, MAT_LAST_FIELD);
339 avio_w8(pb, 4);
340 avio_wb32(pb, gxf->nb_fields);
341
342 /* reserved */
343 avio_w8(pb, MAT_MARK_IN);
344 avio_w8(pb, 4);
345 avio_wb32(pb, 0);
346
347 avio_w8(pb, MAT_MARK_OUT);
348 avio_w8(pb, 4);
349 avio_wb32(pb, gxf->nb_fields);
350
351 /* estimated size */
352 avio_w8(pb, MAT_SIZE);
353 avio_w8(pb, 4);
354 avio_wb32(pb, avio_size(pb) / 1024);
355
356 return updateSize(pb, pos);
357 }
358
gxf_write_track_description_section(AVFormatContext * s)359 static int gxf_write_track_description_section(AVFormatContext *s)
360 {
361 GXFContext *gxf = s->priv_data;
362 AVIOContext *pb = s->pb;
363 int64_t pos;
364 int i;
365
366 pos = avio_tell(pb);
367 avio_wb16(pb, 0); /* size */
368 for (i = 0; i < s->nb_streams; ++i)
369 gxf_write_track_description(s, s->streams[i]->priv_data, i);
370
371 gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams);
372
373 return updateSize(pb, pos);
374 }
375
gxf_write_map_packet(AVFormatContext * s,int rewrite)376 static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
377 {
378 GXFContext *gxf = s->priv_data;
379 AVIOContext *pb = s->pb;
380 int64_t pos = avio_tell(pb);
381
382 if (!rewrite) {
383 if (!(gxf->map_offsets_nb % 30)) {
384 int err;
385 if ((err = av_reallocp_array(&gxf->map_offsets,
386 gxf->map_offsets_nb + 30,
387 sizeof(*gxf->map_offsets))) < 0) {
388 gxf->map_offsets_nb = 0;
389 av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
390 return err;
391 }
392 }
393 gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here
394 }
395
396 gxf_write_packet_header(pb, PKT_MAP);
397
398 /* preamble */
399 avio_w8(pb, 0xE0); /* version */
400 avio_w8(pb, 0xFF); /* reserved */
401
402 gxf_write_material_data_section(s);
403 gxf_write_track_description_section(s);
404
405 return updatePacketSize(pb, pos);
406 }
407
gxf_write_flt_packet(AVFormatContext * s)408 static int gxf_write_flt_packet(AVFormatContext *s)
409 {
410 GXFContext *gxf = s->priv_data;
411 AVIOContext *pb = s->pb;
412 int64_t pos = avio_tell(pb);
413 int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1;
414 int flt_entries = gxf->nb_fields / fields_per_flt;
415 int i = 0;
416
417 gxf_write_packet_header(pb, PKT_FLT);
418
419 avio_wl32(pb, fields_per_flt); /* number of fields */
420 avio_wl32(pb, flt_entries); /* number of active flt entries */
421
422 if (gxf->flt_entries) {
423 for (i = 0; i < flt_entries; i++)
424 avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]);
425 }
426
427 for (; i < 1000; i++)
428 avio_wl32(pb, 0);
429
430 return updatePacketSize(pb, pos);
431 }
432
gxf_write_umf_material_description(AVFormatContext * s)433 static int gxf_write_umf_material_description(AVFormatContext *s)
434 {
435 GXFContext *gxf = s->priv_data;
436 AVIOContext *pb = s->pb;
437 int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
438 int64_t timestamp = 0;
439 AVDictionaryEntry *t;
440 uint64_t nb_fields;
441 uint32_t timecode_in; // timecode at mark in
442 uint32_t timecode_out; // timecode at mark out
443
444 if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
445 timestamp = ff_iso8601_to_unix_time(t->value);
446
447 timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
448 gxf->tc.hh, gxf->tc.mm,
449 gxf->tc.ss, gxf->tc.ff);
450
451 nb_fields = gxf->nb_fields +
452 gxf->tc.hh * (timecode_base * 3600) +
453 gxf->tc.mm * (timecode_base * 60) +
454 gxf->tc.ss * timecode_base +
455 gxf->tc.ff;
456
457 timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
458 nb_fields / (timecode_base * 3600) % 24,
459 nb_fields / (timecode_base * 60) % 60,
460 nb_fields / timecode_base % 60,
461 nb_fields % timecode_base);
462
463 avio_wl32(pb, gxf->flags);
464 avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
465 avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
466 avio_wl32(pb, 0); /* mark in */
467 avio_wl32(pb, gxf->nb_fields); /* mark out */
468 avio_wl32(pb, timecode_in); /* timecode mark in */
469 avio_wl32(pb, timecode_out); /* timecode mark out */
470 avio_wl64(pb, timestamp); /* modification time */
471 avio_wl64(pb, timestamp); /* creation time */
472 avio_wl16(pb, 0); /* reserved */
473 avio_wl16(pb, 0); /* reserved */
474 avio_wl16(pb, gxf->audio_tracks);
475 avio_wl16(pb, 1); /* timecode track count */
476 avio_wl16(pb, 0); /* reserved */
477 avio_wl16(pb, gxf->mpeg_tracks);
478 return 48;
479 }
480
gxf_write_umf_payload(AVFormatContext * s)481 static int gxf_write_umf_payload(AVFormatContext *s)
482 {
483 GXFContext *gxf = s->priv_data;
484 AVIOContext *pb = s->pb;
485
486 avio_wl32(pb, gxf->umf_length); /* total length of the umf data */
487 avio_wl32(pb, 3); /* version */
488 avio_wl32(pb, s->nb_streams+1);
489 avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */
490 avio_wl32(pb, gxf->umf_track_size);
491 avio_wl32(pb, s->nb_streams+1);
492 avio_wl32(pb, gxf->umf_media_offset);
493 avio_wl32(pb, gxf->umf_media_size);
494 avio_wl32(pb, gxf->umf_length); /* user data offset */
495 avio_wl32(pb, 0); /* user data size */
496 avio_wl32(pb, 0); /* reserved */
497 avio_wl32(pb, 0); /* reserved */
498 return 48;
499 }
500
gxf_write_umf_track_description(AVFormatContext * s)501 static int gxf_write_umf_track_description(AVFormatContext *s)
502 {
503 AVIOContext *pb = s->pb;
504 GXFContext *gxf = s->priv_data;
505 int64_t pos = avio_tell(pb);
506 int i;
507
508 gxf->umf_track_offset = pos - gxf->umf_start_offset;
509 for (i = 0; i < s->nb_streams; ++i) {
510 GXFStreamContext *sc = s->streams[i]->priv_data;
511 avio_wl16(pb, sc->media_info);
512 avio_wl16(pb, 1);
513 }
514
515 avio_wl16(pb, gxf->timecode_track.media_info);
516 avio_wl16(pb, 1);
517
518 return avio_tell(pb) - pos;
519 }
520
gxf_write_umf_media_mpeg(AVIOContext * pb,AVStream * st)521 static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
522 {
523 GXFStreamContext *sc = st->priv_data;
524
525 if (st->codec->pix_fmt == AV_PIX_FMT_YUV422P)
526 avio_wl32(pb, 2);
527 else
528 avio_wl32(pb, 1); /* default to 420 */
529 avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
530 avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
531 avio_wl32(pb, 1); /* I picture per GOP */
532 avio_wl32(pb, sc->p_per_gop);
533 avio_wl32(pb, sc->b_per_i_or_p);
534 if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO)
535 avio_wl32(pb, 2);
536 else if (st->codec->codec_id == AV_CODEC_ID_MPEG1VIDEO)
537 avio_wl32(pb, 1);
538 else
539 avio_wl32(pb, 0);
540 avio_wl32(pb, 0); /* reserved */
541 return 32;
542 }
543
gxf_write_umf_media_timecode(AVIOContext * pb,int drop)544 static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
545 {
546 avio_wl32(pb, drop); /* drop frame */
547 avio_wl32(pb, 0); /* reserved */
548 avio_wl32(pb, 0); /* reserved */
549 avio_wl32(pb, 0); /* reserved */
550 avio_wl32(pb, 0); /* reserved */
551 avio_wl32(pb, 0); /* reserved */
552 avio_wl32(pb, 0); /* reserved */
553 avio_wl32(pb, 0); /* reserved */
554 return 32;
555 }
556
gxf_write_umf_media_dv(AVIOContext * pb,GXFStreamContext * sc,AVStream * st)557 static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc, AVStream *st)
558 {
559 int dv_umf_data = 0;
560
561 if (st->codec->pix_fmt == AV_PIX_FMT_YUV420P)
562 dv_umf_data |= 0x20; /* marks as DVCAM instead of DVPRO */
563 avio_wl32(pb, dv_umf_data);
564 avio_wl32(pb, 0);
565 avio_wl32(pb, 0);
566 avio_wl32(pb, 0);
567 avio_wl32(pb, 0);
568 avio_wl32(pb, 0);
569 avio_wl32(pb, 0);
570 avio_wl32(pb, 0);
571 return 32;
572 }
573
gxf_write_umf_media_audio(AVIOContext * pb,GXFStreamContext * sc)574 static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
575 {
576 avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
577 avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
578 avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */
579 avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */
580 avio_wl32(pb, 0); /* reserved */
581 avio_wl32(pb, 0); /* reserved */
582 return 32;
583 }
584
gxf_write_umf_media_description(AVFormatContext * s)585 static int gxf_write_umf_media_description(AVFormatContext *s)
586 {
587 GXFContext *gxf = s->priv_data;
588 AVIOContext *pb = s->pb;
589 int64_t pos;
590 int i, j;
591
592 pos = avio_tell(pb);
593 gxf->umf_media_offset = pos - gxf->umf_start_offset;
594 for (i = 0; i <= s->nb_streams; ++i) {
595 GXFStreamContext *sc;
596 int64_t startpos, curpos;
597
598 if (i == s->nb_streams)
599 sc = &gxf->timecode_track;
600 else
601 sc = s->streams[i]->priv_data;
602
603 startpos = avio_tell(pb);
604 avio_wl16(pb, 0); /* length */
605 avio_wl16(pb, sc->media_info);
606 avio_wl16(pb, 0); /* reserved */
607 avio_wl16(pb, 0); /* reserved */
608 avio_wl32(pb, gxf->nb_fields);
609 avio_wl32(pb, 0); /* attributes rw, ro */
610 avio_wl32(pb, 0); /* mark in */
611 avio_wl32(pb, gxf->nb_fields); /* mark out */
612 avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
613 avio_wb16(pb, sc->media_info);
614 for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++)
615 avio_w8(pb, 0);
616 avio_wl32(pb, sc->track_type);
617 avio_wl32(pb, sc->sample_rate);
618 avio_wl32(pb, sc->sample_size);
619 avio_wl32(pb, 0); /* reserved */
620
621 if (sc == &gxf->timecode_track)
622 gxf_write_umf_media_timecode(pb, gxf->tc.drop);
623 else {
624 AVStream *st = s->streams[i];
625 switch (st->codec->codec_id) {
626 case AV_CODEC_ID_MPEG1VIDEO:
627 case AV_CODEC_ID_MPEG2VIDEO:
628 gxf_write_umf_media_mpeg(pb, st);
629 break;
630 case AV_CODEC_ID_PCM_S16LE:
631 gxf_write_umf_media_audio(pb, sc);
632 break;
633 case AV_CODEC_ID_DVVIDEO:
634 gxf_write_umf_media_dv(pb, sc, st);
635 break;
636 }
637 }
638
639 curpos = avio_tell(pb);
640 avio_seek(pb, startpos, SEEK_SET);
641 avio_wl16(pb, curpos - startpos);
642 avio_seek(pb, curpos, SEEK_SET);
643 }
644 return avio_tell(pb) - pos;
645 }
646
gxf_write_umf_packet(AVFormatContext * s)647 static int gxf_write_umf_packet(AVFormatContext *s)
648 {
649 GXFContext *gxf = s->priv_data;
650 AVIOContext *pb = s->pb;
651 int64_t pos = avio_tell(pb);
652
653 gxf_write_packet_header(pb, PKT_UMF);
654
655 /* preamble */
656 avio_w8(pb, 3); /* first and last (only) packet */
657 avio_wb32(pb, gxf->umf_length); /* data length */
658
659 gxf->umf_start_offset = avio_tell(pb);
660 gxf_write_umf_payload(s);
661 gxf_write_umf_material_description(s);
662 gxf->umf_track_size = gxf_write_umf_track_description(s);
663 gxf->umf_media_size = gxf_write_umf_media_description(s);
664 gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset;
665 return updatePacketSize(pb, pos);
666 }
667
668 static const int GXF_samples_per_frame[] = { 32768, 0 };
669
gxf_init_timecode_track(GXFStreamContext * sc,GXFStreamContext * vsc)670 static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
671 {
672 if (!vsc)
673 return;
674
675 sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
676 sc->sample_rate = vsc->sample_rate;
677 sc->media_info = ('T'<<8) | '0';
678 sc->track_type = 3;
679 sc->frame_rate_index = vsc->frame_rate_index;
680 sc->lines_index = vsc->lines_index;
681 sc->sample_size = 16;
682 sc->fields = vsc->fields;
683 }
684
gxf_init_timecode(AVFormatContext * s,GXFTimecode * tc,const char * tcstr,int fields)685 static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
686 {
687 char c;
688
689 if (sscanf(tcstr, "%d:%d:%d%c%d", &tc->hh, &tc->mm, &tc->ss, &c, &tc->ff) != 5) {
690 av_log(s, AV_LOG_ERROR, "unable to parse timecode, "
691 "syntax: hh:mm:ss[:;.]ff\n");
692 return -1;
693 }
694
695 tc->color = 0;
696 tc->drop = c != ':';
697
698 if (fields == 2)
699 tc->ff = tc->ff * 2;
700
701 return 0;
702 }
703
gxf_write_header(AVFormatContext * s)704 static int gxf_write_header(AVFormatContext *s)
705 {
706 AVIOContext *pb = s->pb;
707 GXFContext *gxf = s->priv_data;
708 GXFStreamContext *vsc = NULL;
709 uint8_t tracks[255] = {0};
710 int i, media_info = 0;
711 int ret;
712 AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
713
714 if (!pb->seekable) {
715 av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome\n");
716 return -1;
717 }
718
719 gxf->flags |= 0x00080000; /* material is simple clip */
720 for (i = 0; i < s->nb_streams; ++i) {
721 AVStream *st = s->streams[i];
722 GXFStreamContext *sc = av_mallocz(sizeof(*sc));
723 if (!sc)
724 return AVERROR(ENOMEM);
725 st->priv_data = sc;
726
727 sc->media_type = ff_codec_get_tag(gxf_media_types, st->codec->codec_id);
728 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
729 if (st->codec->codec_id != AV_CODEC_ID_PCM_S16LE) {
730 av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
731 return -1;
732 }
733 if (st->codec->sample_rate != 48000) {
734 av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
735 return -1;
736 }
737 if (st->codec->channels != 1) {
738 av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
739 return -1;
740 }
741 sc->track_type = 2;
742 sc->sample_rate = st->codec->sample_rate;
743 avpriv_set_pts_info(st, 64, 1, sc->sample_rate);
744 sc->sample_size = 16;
745 sc->frame_rate_index = -2;
746 sc->lines_index = -2;
747 sc->fields = -2;
748 gxf->audio_tracks++;
749 gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
750 media_info = 'A';
751 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
752 if (i != 0) {
753 av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
754 return -1;
755 }
756 /* FIXME check from time_base ? */
757 if (st->codec->height == 480 || st->codec->height == 512) { /* NTSC or NTSC+VBI */
758 sc->frame_rate_index = 5;
759 sc->sample_rate = 60;
760 gxf->flags |= 0x00000080;
761 gxf->time_base = (AVRational){ 1001, 60000 };
762 } else if (st->codec->height == 576 || st->codec->height == 608) { /* PAL or PAL+VBI */
763 sc->frame_rate_index = 6;
764 sc->media_type++;
765 sc->sample_rate = 50;
766 gxf->flags |= 0x00000040;
767 gxf->time_base = (AVRational){ 1, 50 };
768 } else {
769 av_log(s, AV_LOG_ERROR, "unsupported video resolution, "
770 "gxf muxer only accepts PAL or NTSC resolutions currently\n");
771 return -1;
772 }
773 if (!tcr)
774 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
775 avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
776 if (gxf_find_lines_index(st) < 0)
777 sc->lines_index = -1;
778 sc->sample_size = st->codec->bit_rate;
779 sc->fields = 2; /* interlaced */
780
781 vsc = sc;
782
783 switch (st->codec->codec_id) {
784 case AV_CODEC_ID_MJPEG:
785 sc->track_type = 1;
786 gxf->flags |= 0x00004000;
787 media_info = 'J';
788 break;
789 case AV_CODEC_ID_MPEG1VIDEO:
790 sc->track_type = 9;
791 gxf->mpeg_tracks++;
792 media_info = 'L';
793 break;
794 case AV_CODEC_ID_MPEG2VIDEO:
795 sc->first_gop_closed = -1;
796 sc->track_type = 4;
797 gxf->mpeg_tracks++;
798 gxf->flags |= 0x00008000;
799 media_info = 'M';
800 break;
801 case AV_CODEC_ID_DVVIDEO:
802 if (st->codec->pix_fmt == AV_PIX_FMT_YUV422P) {
803 sc->media_type += 2;
804 sc->track_type = 6;
805 gxf->flags |= 0x00002000;
806 media_info = 'E';
807 } else {
808 sc->track_type = 5;
809 gxf->flags |= 0x00001000;
810 media_info = 'D';
811 }
812 break;
813 default:
814 av_log(s, AV_LOG_ERROR, "video codec not supported\n");
815 return -1;
816 }
817 }
818 /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
819 sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
820 sc->order = s->nb_streams - st->index;
821 }
822
823 if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0)
824 return -1;
825
826 if (tcr && vsc)
827 gxf_init_timecode(s, &gxf->tc, tcr->value, vsc->fields);
828
829 gxf_init_timecode_track(&gxf->timecode_track, vsc);
830 gxf->flags |= 0x200000; // time code track is non-drop frame
831
832 if ((ret = gxf_write_map_packet(s, 0)) < 0)
833 return ret;
834 gxf_write_flt_packet(s);
835 gxf_write_umf_packet(s);
836
837 gxf->packet_count = 3;
838
839 avio_flush(pb);
840 return 0;
841 }
842
gxf_write_eos_packet(AVIOContext * pb)843 static int gxf_write_eos_packet(AVIOContext *pb)
844 {
845 int64_t pos = avio_tell(pb);
846
847 gxf_write_packet_header(pb, PKT_EOS);
848 return updatePacketSize(pb, pos);
849 }
850
gxf_write_trailer(AVFormatContext * s)851 static int gxf_write_trailer(AVFormatContext *s)
852 {
853 GXFContext *gxf = s->priv_data;
854 AVIOContext *pb = s->pb;
855 int64_t end;
856 int i;
857 int ret;
858
859 ff_audio_interleave_close(s);
860
861 gxf_write_eos_packet(pb);
862 end = avio_tell(pb);
863 avio_seek(pb, 0, SEEK_SET);
864 /* overwrite map, flt and umf packets with new values */
865 if ((ret = gxf_write_map_packet(s, 1)) < 0)
866 return ret;
867 gxf_write_flt_packet(s);
868 gxf_write_umf_packet(s);
869 avio_flush(pb);
870 /* update duration in all map packets */
871 for (i = 1; i < gxf->map_offsets_nb; i++) {
872 avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
873 if ((ret = gxf_write_map_packet(s, 1)) < 0)
874 return ret;
875 avio_flush(pb);
876 }
877
878 avio_seek(pb, end, SEEK_SET);
879
880 av_freep(&gxf->flt_entries);
881 av_freep(&gxf->map_offsets);
882
883 return 0;
884 }
885
gxf_parse_mpeg_frame(GXFStreamContext * sc,const uint8_t * buf,int size)886 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
887 {
888 uint32_t c=-1;
889 int i;
890 for(i=0; i<size-4 && c!=0x100; i++){
891 c = (c<<8) + buf[i];
892 if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
893 sc->first_gop_closed= (buf[i+4]>>6)&1;
894 }
895 return (buf[i+1]>>3)&7;
896 }
897
gxf_write_media_preamble(AVFormatContext * s,AVPacket * pkt,int size)898 static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
899 {
900 GXFContext *gxf = s->priv_data;
901 AVIOContext *pb = s->pb;
902 AVStream *st = s->streams[pkt->stream_index];
903 GXFStreamContext *sc = st->priv_data;
904 unsigned field_nb;
905 /* If the video is frame-encoded, the frame numbers shall be represented by
906 * even field numbers.
907 * see SMPTE360M-2004 6.4.2.1.3 Media field number */
908 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
909 field_nb = gxf->nb_fields;
910 } else {
911 field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
912 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
913 }
914
915 avio_w8(pb, sc->media_type);
916 avio_w8(pb, st->index);
917 avio_wb32(pb, field_nb);
918 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
919 avio_wb16(pb, 0);
920 avio_wb16(pb, size / 2);
921 } else if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
922 int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
923 if (frame_type == AV_PICTURE_TYPE_I) {
924 avio_w8(pb, 0x0d);
925 sc->iframes++;
926 } else if (frame_type == AV_PICTURE_TYPE_B) {
927 avio_w8(pb, 0x0f);
928 sc->bframes++;
929 } else {
930 avio_w8(pb, 0x0e);
931 sc->pframes++;
932 }
933 avio_wb24(pb, size);
934 } else if (st->codec->codec_id == AV_CODEC_ID_DVVIDEO) {
935 avio_w8(pb, size / 4096);
936 avio_wb24(pb, 0);
937 } else
938 avio_wb32(pb, size);
939 avio_wb32(pb, field_nb);
940 avio_w8(pb, 1); /* flags */
941 avio_w8(pb, 0); /* reserved */
942 return 16;
943 }
944
gxf_write_packet(AVFormatContext * s,AVPacket * pkt)945 static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
946 {
947 GXFContext *gxf = s->priv_data;
948 AVIOContext *pb = s->pb;
949 AVStream *st = s->streams[pkt->stream_index];
950 int64_t pos = avio_tell(pb);
951 int padding = 0;
952 unsigned packet_start_offset = avio_tell(pb) / 1024;
953 int ret;
954
955 gxf_write_packet_header(pb, PKT_MEDIA);
956 if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
957 padding = 4 - pkt->size % 4;
958 else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
959 padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
960 gxf_write_media_preamble(s, pkt, pkt->size + padding);
961 avio_write(pb, pkt->data, pkt->size);
962 gxf_write_padding(pb, padding);
963
964 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
965 if (!(gxf->flt_entries_nb % 500)) {
966 int err;
967 if ((err = av_reallocp_array(&gxf->flt_entries,
968 gxf->flt_entries_nb + 500,
969 sizeof(*gxf->flt_entries))) < 0) {
970 gxf->flt_entries_nb = 0;
971 gxf->nb_fields = 0;
972 av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
973 return err;
974 }
975 }
976 gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
977 gxf->nb_fields += 2; // count fields
978 }
979
980 updatePacketSize(pb, pos);
981
982 gxf->packet_count++;
983 if (gxf->packet_count == 100) {
984 if ((ret = gxf_write_map_packet(s, 0)) < 0)
985 return ret;
986 gxf->packet_count = 0;
987 }
988
989 return 0;
990 }
991
gxf_compare_field_nb(AVFormatContext * s,AVPacket * next,AVPacket * cur)992 static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur)
993 {
994 GXFContext *gxf = s->priv_data;
995 AVPacket *pkt[2] = { cur, next };
996 int i, field_nb[2];
997 GXFStreamContext *sc[2];
998
999 for (i = 0; i < 2; i++) {
1000 AVStream *st = s->streams[pkt[i]->stream_index];
1001 sc[i] = st->priv_data;
1002 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1003 field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den,
1004 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
1005 field_nb[i] &= ~1; // compare against even field number because audio must be before video
1006 } else
1007 field_nb[i] = pkt[i]->dts; // dts are field based
1008 }
1009
1010 return field_nb[1] > field_nb[0] ||
1011 (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
1012 }
1013
gxf_interleave_packet(AVFormatContext * s,AVPacket * out,AVPacket * pkt,int flush)1014 static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1015 {
1016 if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1017 pkt->duration = 2; // enforce 2 fields
1018 return ff_audio_rechunk_interleave(s, out, pkt, flush,
1019 ff_interleave_packet_per_dts, gxf_compare_field_nb);
1020 }
1021
1022 AVOutputFormat ff_gxf_muxer = {
1023 .name = "gxf",
1024 .long_name = NULL_IF_CONFIG_SMALL("GXF (General eXchange Format)"),
1025 .extensions = "gxf",
1026 .priv_data_size = sizeof(GXFContext),
1027 .audio_codec = AV_CODEC_ID_PCM_S16LE,
1028 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1029 .write_header = gxf_write_header,
1030 .write_packet = gxf_write_packet,
1031 .write_trailer = gxf_write_trailer,
1032 .interleave_packet = gxf_interleave_packet,
1033 };
1034