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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
37typedef struct GXFTimecode{
38 int hh;
39 int mm;
40 int ss;
41 int ff;
42 int color;
43 int drop;
44} GXFTimecode;
45
46typedef 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
65typedef 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
88static 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
99static 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
121static 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->codecpar->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
135static 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
142static 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
159static 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
170static 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
181static 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->codecpar->height == 512 || st->codecpar->height == 608)
202 starting_line = 7; // VBI
203 else if (st->codecpar->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->codecpar->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
211 st->codecpar->format == AV_PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
212 starting_line, (st->codecpar->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
220static 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->codecpar->format == 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
233static 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
247static 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
308static 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
359static 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
376static 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
408static 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
433static 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 uint64_t nb_fields;
440 uint32_t timecode_in; // timecode at mark in
441 uint32_t timecode_out; // timecode at mark out
442
443 ff_parse_creation_time_metadata(s, &timestamp, 1);
444
445 timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
446 gxf->tc.hh, gxf->tc.mm,
447 gxf->tc.ss, gxf->tc.ff);
448
449 nb_fields = gxf->nb_fields +
450 gxf->tc.hh * (timecode_base * 3600) +
451 gxf->tc.mm * (timecode_base * 60) +
452 gxf->tc.ss * timecode_base +
453 gxf->tc.ff;
454
455 timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
456 nb_fields / (timecode_base * 3600) % 24,
457 nb_fields / (timecode_base * 60) % 60,
458 nb_fields / timecode_base % 60,
459 nb_fields % timecode_base);
460
461 avio_wl32(pb, gxf->flags);
462 avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
463 avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
464 avio_wl32(pb, 0); /* mark in */
465 avio_wl32(pb, gxf->nb_fields); /* mark out */
466 avio_wl32(pb, timecode_in); /* timecode mark in */
467 avio_wl32(pb, timecode_out); /* timecode mark out */
468 avio_wl64(pb, timestamp); /* modification time */
469 avio_wl64(pb, timestamp); /* creation time */
470 avio_wl16(pb, 0); /* reserved */
471 avio_wl16(pb, 0); /* reserved */
472 avio_wl16(pb, gxf->audio_tracks);
473 avio_wl16(pb, 1); /* timecode track count */
474 avio_wl16(pb, 0); /* reserved */
475 avio_wl16(pb, gxf->mpeg_tracks);
476 return 48;
477}
478
479static int gxf_write_umf_payload(AVFormatContext *s)
480{
481 GXFContext *gxf = s->priv_data;
482 AVIOContext *pb = s->pb;
483
484 avio_wl32(pb, gxf->umf_length); /* total length of the umf data */
485 avio_wl32(pb, 3); /* version */
486 avio_wl32(pb, s->nb_streams+1);
487 avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */
488 avio_wl32(pb, gxf->umf_track_size);
489 avio_wl32(pb, s->nb_streams+1);
490 avio_wl32(pb, gxf->umf_media_offset);
491 avio_wl32(pb, gxf->umf_media_size);
492 avio_wl32(pb, gxf->umf_length); /* user data offset */
493 avio_wl32(pb, 0); /* user data size */
494 avio_wl32(pb, 0); /* reserved */
495 avio_wl32(pb, 0); /* reserved */
496 return 48;
497}
498
499static int gxf_write_umf_track_description(AVFormatContext *s)
500{
501 AVIOContext *pb = s->pb;
502 GXFContext *gxf = s->priv_data;
503 int64_t pos = avio_tell(pb);
504 int i;
505
506 gxf->umf_track_offset = pos - gxf->umf_start_offset;
507 for (i = 0; i < s->nb_streams; ++i) {
508 GXFStreamContext *sc = s->streams[i]->priv_data;
509 avio_wl16(pb, sc->media_info);
510 avio_wl16(pb, 1);
511 }
512
513 avio_wl16(pb, gxf->timecode_track.media_info);
514 avio_wl16(pb, 1);
515
516 return avio_tell(pb) - pos;
517}
518
519static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
520{
521 GXFStreamContext *sc = st->priv_data;
522
523 if (st->codecpar->format == AV_PIX_FMT_YUV422P)
524 avio_wl32(pb, 2);
525 else
526 avio_wl32(pb, 1); /* default to 420 */
527 avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
528 avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
529 avio_wl32(pb, 1); /* I picture per GOP */
530 avio_wl32(pb, sc->p_per_gop);
531 avio_wl32(pb, sc->b_per_i_or_p);
532 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO)
533 avio_wl32(pb, 2);
534 else if (st->codecpar->codec_id == AV_CODEC_ID_MPEG1VIDEO)
535 avio_wl32(pb, 1);
536 else
537 avio_wl32(pb, 0);
538 avio_wl32(pb, 0); /* reserved */
539 return 32;
540}
541
542static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
543{
544 avio_wl32(pb, drop); /* drop frame */
545 avio_wl32(pb, 0); /* reserved */
546 avio_wl32(pb, 0); /* reserved */
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 return 32;
553}
554
555static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc, AVStream *st)
556{
557 int dv_umf_data = 0;
558
559 if (st->codecpar->format == AV_PIX_FMT_YUV420P)
560 dv_umf_data |= 0x20; /* marks as DVCAM instead of DVPRO */
561 avio_wl32(pb, dv_umf_data);
562 avio_wl32(pb, 0);
563 avio_wl32(pb, 0);
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 return 32;
570}
571
572static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
573{
574 avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
575 avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
576 avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */
577 avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */
578 avio_wl32(pb, 0); /* reserved */
579 avio_wl32(pb, 0); /* reserved */
580 return 32;
581}
582
583static int gxf_write_umf_media_description(AVFormatContext *s)
584{
585 GXFContext *gxf = s->priv_data;
586 AVIOContext *pb = s->pb;
587 int64_t pos;
588 int i, j;
589
590 pos = avio_tell(pb);
591 gxf->umf_media_offset = pos - gxf->umf_start_offset;
592 for (i = 0; i <= s->nb_streams; ++i) {
593 GXFStreamContext *sc;
594 int64_t startpos, curpos;
595
596 if (i == s->nb_streams)
597 sc = &gxf->timecode_track;
598 else
599 sc = s->streams[i]->priv_data;
600
601 startpos = avio_tell(pb);
602 avio_wl16(pb, 0); /* length */
603 avio_wl16(pb, sc->media_info);
604 avio_wl16(pb, 0); /* reserved */
605 avio_wl16(pb, 0); /* reserved */
606 avio_wl32(pb, gxf->nb_fields);
607 avio_wl32(pb, 0); /* attributes rw, ro */
608 avio_wl32(pb, 0); /* mark in */
609 avio_wl32(pb, gxf->nb_fields); /* mark out */
610 avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
611 avio_wb16(pb, sc->media_info);
612 for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++)
613 avio_w8(pb, 0);
614 avio_wl32(pb, sc->track_type);
615 avio_wl32(pb, sc->sample_rate);
616 avio_wl32(pb, sc->sample_size);
617 avio_wl32(pb, 0); /* reserved */
618
619 if (sc == &gxf->timecode_track)
620 gxf_write_umf_media_timecode(pb, gxf->tc.drop);
621 else {
622 AVStream *st = s->streams[i];
623 switch (st->codecpar->codec_id) {
624 case AV_CODEC_ID_MPEG1VIDEO:
625 case AV_CODEC_ID_MPEG2VIDEO:
626 gxf_write_umf_media_mpeg(pb, st);
627 break;
628 case AV_CODEC_ID_PCM_S16LE:
629 gxf_write_umf_media_audio(pb, sc);
630 break;
631 case AV_CODEC_ID_DVVIDEO:
632 gxf_write_umf_media_dv(pb, sc, st);
633 break;
634 }
635 }
636
637 curpos = avio_tell(pb);
638 avio_seek(pb, startpos, SEEK_SET);
639 avio_wl16(pb, curpos - startpos);
640 avio_seek(pb, curpos, SEEK_SET);
641 }
642 return avio_tell(pb) - pos;
643}
644
645static int gxf_write_umf_packet(AVFormatContext *s)
646{
647 GXFContext *gxf = s->priv_data;
648 AVIOContext *pb = s->pb;
649 int64_t pos = avio_tell(pb);
650
651 gxf_write_packet_header(pb, PKT_UMF);
652
653 /* preamble */
654 avio_w8(pb, 3); /* first and last (only) packet */
655 avio_wb32(pb, gxf->umf_length); /* data length */
656
657 gxf->umf_start_offset = avio_tell(pb);
658 gxf_write_umf_payload(s);
659 gxf_write_umf_material_description(s);
660 gxf->umf_track_size = gxf_write_umf_track_description(s);
661 gxf->umf_media_size = gxf_write_umf_media_description(s);
662 gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset;
663 return updatePacketSize(pb, pos);
664}
665
666static const int GXF_samples_per_frame[] = { 32768, 0 };
667
668static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
669{
670 if (!vsc)
671 return;
672
673 sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
674 sc->sample_rate = vsc->sample_rate;
675 sc->media_info = ('T'<<8) | '0';
676 sc->track_type = 3;
677 sc->frame_rate_index = vsc->frame_rate_index;
678 sc->lines_index = vsc->lines_index;
679 sc->sample_size = 16;
680 sc->fields = vsc->fields;
681}
682
683static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
684{
685 char c;
686
687 if (sscanf(tcstr, "%d:%d:%d%c%d", &tc->hh, &tc->mm, &tc->ss, &c, &tc->ff) != 5) {
688 av_log(s, AV_LOG_ERROR, "unable to parse timecode, "
689 "syntax: hh:mm:ss[:;.]ff\n");
690 return -1;
691 }
692
693 tc->color = 0;
694 tc->drop = c != ':';
695
696 if (fields == 2)
697 tc->ff = tc->ff * 2;
698
699 return 0;
700}
701
702static int gxf_write_header(AVFormatContext *s)
703{
704 AVIOContext *pb = s->pb;
705 GXFContext *gxf = s->priv_data;
706 GXFStreamContext *vsc = NULL;
707 uint8_t tracks[255] = {0};
708 int i, media_info = 0;
709 int ret;
710 AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
711
712 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
713 av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome\n");
714 return -1;
715 }
716
717 gxf->flags |= 0x00080000; /* material is simple clip */
718 for (i = 0; i < s->nb_streams; ++i) {
719 AVStream *st = s->streams[i];
720 GXFStreamContext *sc = av_mallocz(sizeof(*sc));
721 if (!sc)
722 return AVERROR(ENOMEM);
723 st->priv_data = sc;
724
725 sc->media_type = ff_codec_get_tag(gxf_media_types, st->codecpar->codec_id);
726 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
727 if (st->codecpar->codec_id != AV_CODEC_ID_PCM_S16LE) {
728 av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
729 return -1;
730 }
731 if (st->codecpar->sample_rate != 48000) {
732 av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
733 return -1;
734 }
735 if (st->codecpar->channels != 1) {
736 av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
737 return -1;
738 }
739 sc->track_type = 2;
740 sc->sample_rate = st->codecpar->sample_rate;
741 avpriv_set_pts_info(st, 64, 1, sc->sample_rate);
742 sc->sample_size = 16;
743 sc->frame_rate_index = -2;
744 sc->lines_index = -2;
745 sc->fields = -2;
746 gxf->audio_tracks++;
747 gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
748 media_info = 'A';
749 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
750 if (i != 0) {
751 av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
752 return -1;
753 }
754 /* FIXME check from time_base ? */
755 if (st->codecpar->height == 480 || st->codecpar->height == 512) { /* NTSC or NTSC+VBI */
756 sc->frame_rate_index = 5;
757 sc->sample_rate = 60;
758 gxf->flags |= 0x00000080;
759 gxf->time_base = (AVRational){ 1001, 60000 };
760 } else if (st->codecpar->height == 576 || st->codecpar->height == 608) { /* PAL or PAL+VBI */
761 sc->frame_rate_index = 6;
762 sc->media_type++;
763 sc->sample_rate = 50;
764 gxf->flags |= 0x00000040;
765 gxf->time_base = (AVRational){ 1, 50 };
766 } else {
767 av_log(s, AV_LOG_ERROR, "unsupported video resolution, "
768 "gxf muxer only accepts PAL or NTSC resolutions currently\n");
769 return -1;
770 }
771 if (!tcr)
772 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
773 avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
774 if (gxf_find_lines_index(st) < 0)
775 sc->lines_index = -1;
776 sc->sample_size = st->codecpar->bit_rate;
777 sc->fields = 2; /* interlaced */
778
779 vsc = sc;
780
781 switch (st->codecpar->codec_id) {
782 case AV_CODEC_ID_MJPEG:
783 sc->track_type = 1;
784 gxf->flags |= 0x00004000;
785 media_info = 'J';
786 break;
787 case AV_CODEC_ID_MPEG1VIDEO:
788 sc->track_type = 9;
789 gxf->mpeg_tracks++;
790 media_info = 'L';
791 break;
792 case AV_CODEC_ID_MPEG2VIDEO:
793 sc->first_gop_closed = -1;
794 sc->track_type = 4;
795 gxf->mpeg_tracks++;
796 gxf->flags |= 0x00008000;
797 media_info = 'M';
798 break;
799 case AV_CODEC_ID_DVVIDEO:
800 if (st->codecpar->format == AV_PIX_FMT_YUV422P) {
801 sc->media_type += 2;
802 sc->track_type = 6;
803 gxf->flags |= 0x00002000;
804 media_info = 'E';
805 } else {
806 sc->track_type = 5;
807 gxf->flags |= 0x00001000;
808 media_info = 'D';
809 }
810 break;
811 default:
812 av_log(s, AV_LOG_ERROR, "video codec not supported\n");
813 return -1;
814 }
815 }
816 /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
817 sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
818 sc->order = s->nb_streams - st->index;
819 }
820
821 if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0)
822 return -1;
823
824 if (tcr && vsc)
825 gxf_init_timecode(s, &gxf->tc, tcr->value, vsc->fields);
826
827 gxf_init_timecode_track(&gxf->timecode_track, vsc);
828 gxf->flags |= 0x200000; // time code track is non-drop frame
829
830 if ((ret = gxf_write_map_packet(s, 0)) < 0)
831 return ret;
832 gxf_write_flt_packet(s);
833 gxf_write_umf_packet(s);
834
835 gxf->packet_count = 3;
836
837 avio_flush(pb);
838 return 0;
839}
840
841static int gxf_write_eos_packet(AVIOContext *pb)
842{
843 int64_t pos = avio_tell(pb);
844
845 gxf_write_packet_header(pb, PKT_EOS);
846 return updatePacketSize(pb, pos);
847}
848
849static int gxf_write_trailer(AVFormatContext *s)
850{
851 GXFContext *gxf = s->priv_data;
852 AVIOContext *pb = s->pb;
853 int64_t end;
854 int i;
855 int ret;
856
857 ff_audio_interleave_close(s);
858
859 gxf_write_eos_packet(pb);
860 end = avio_tell(pb);
861 avio_seek(pb, 0, SEEK_SET);
862 /* overwrite map, flt and umf packets with new values */
863 if ((ret = gxf_write_map_packet(s, 1)) < 0)
864 return ret;
865 gxf_write_flt_packet(s);
866 gxf_write_umf_packet(s);
867 avio_flush(pb);
868 /* update duration in all map packets */
869 for (i = 1; i < gxf->map_offsets_nb; i++) {
870 avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
871 if ((ret = gxf_write_map_packet(s, 1)) < 0)
872 return ret;
873 avio_flush(pb);
874 }
875
876 avio_seek(pb, end, SEEK_SET);
877
878 av_freep(&gxf->flt_entries);
879 av_freep(&gxf->map_offsets);
880
881 return 0;
882}
883
884static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
885{
886 uint32_t c=-1;
887 int i;
888 for(i=0; i<size-4 && c!=0x100; i++){
889 c = (c<<8) + buf[i];
890 if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
891 sc->first_gop_closed= (buf[i+4]>>6)&1;
892 }
893 return (buf[i+1]>>3)&7;
894}
895
896static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
897{
898 GXFContext *gxf = s->priv_data;
899 AVIOContext *pb = s->pb;
900 AVStream *st = s->streams[pkt->stream_index];
901 GXFStreamContext *sc = st->priv_data;
902 unsigned field_nb;
903 /* If the video is frame-encoded, the frame numbers shall be represented by
904 * even field numbers.
905 * see SMPTE360M-2004 6.4.2.1.3 Media field number */
906 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
907 field_nb = gxf->nb_fields;
908 } else {
909 field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
910 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
911 }
912
913 avio_w8(pb, sc->media_type);
914 avio_w8(pb, st->index);
915 avio_wb32(pb, field_nb);
916 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
917 avio_wb16(pb, 0);
918 avio_wb16(pb, size / 2);
919 } else if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
920 int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
921 if (frame_type == AV_PICTURE_TYPE_I) {
922 avio_w8(pb, 0x0d);
923 sc->iframes++;
924 } else if (frame_type == AV_PICTURE_TYPE_B) {
925 avio_w8(pb, 0x0f);
926 sc->bframes++;
927 } else {
928 avio_w8(pb, 0x0e);
929 sc->pframes++;
930 }
931 avio_wb24(pb, size);
932 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVVIDEO) {
933 avio_w8(pb, size / 4096);
934 avio_wb24(pb, 0);
935 } else
936 avio_wb32(pb, size);
937 avio_wb32(pb, field_nb);
938 avio_w8(pb, 1); /* flags */
939 avio_w8(pb, 0); /* reserved */
940 return 16;
941}
942
943static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
944{
945 GXFContext *gxf = s->priv_data;
946 AVIOContext *pb = s->pb;
947 AVStream *st = s->streams[pkt->stream_index];
948 int64_t pos = avio_tell(pb);
949 int padding = 0;
950 unsigned packet_start_offset = avio_tell(pb) / 1024;
951 int ret;
952
953 gxf_write_packet_header(pb, PKT_MEDIA);
954 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
955 padding = 4 - pkt->size % 4;
956 else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
957 padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
958 gxf_write_media_preamble(s, pkt, pkt->size + padding);
959 avio_write(pb, pkt->data, pkt->size);
960 gxf_write_padding(pb, padding);
961
962 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
963 if (!(gxf->flt_entries_nb % 500)) {
964 int err;
965 if ((err = av_reallocp_array(&gxf->flt_entries,
966 gxf->flt_entries_nb + 500,
967 sizeof(*gxf->flt_entries))) < 0) {
968 gxf->flt_entries_nb = 0;
969 gxf->nb_fields = 0;
970 av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
971 return err;
972 }
973 }
974 gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
975 gxf->nb_fields += 2; // count fields
976 }
977
978 updatePacketSize(pb, pos);
979
980 gxf->packet_count++;
981 if (gxf->packet_count == 100) {
982 if ((ret = gxf_write_map_packet(s, 0)) < 0)
983 return ret;
984 gxf->packet_count = 0;
985 }
986
987 return 0;
988}
989
990static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur)
991{
992 GXFContext *gxf = s->priv_data;
993 AVPacket *pkt[2] = { cur, next };
994 int i, field_nb[2];
995 GXFStreamContext *sc[2];
996
997 for (i = 0; i < 2; i++) {
998 AVStream *st = s->streams[pkt[i]->stream_index];
999 sc[i] = st->priv_data;
1000 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
1001 field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den,
1002 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
1003 field_nb[i] &= ~1; // compare against even field number because audio must be before video
1004 } else
1005 field_nb[i] = pkt[i]->dts; // dts are field based
1006 }
1007
1008 return field_nb[1] > field_nb[0] ||
1009 (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
1010}
1011
1012static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1013{
1014 if (pkt && s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1015 pkt->duration = 2; // enforce 2 fields
1016 return ff_audio_rechunk_interleave(s, out, pkt, flush,
1017 ff_interleave_packet_per_dts, gxf_compare_field_nb);
1018}
1019
1020AVOutputFormat ff_gxf_muxer = {
1021 .name = "gxf",
1022 .long_name = NULL_IF_CONFIG_SMALL("GXF (General eXchange Format)"),
1023 .extensions = "gxf",
1024 .priv_data_size = sizeof(GXFContext),
1025 .audio_codec = AV_CODEC_ID_PCM_S16LE,
1026 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1027 .write_header = gxf_write_header,
1028 .write_packet = gxf_write_packet,
1029 .write_trailer = gxf_write_trailer,
1030 .interleave_packet = gxf_interleave_packet,
1031};
1032
generated by cgit at 2024-05-17 15:58:23 (GMT)