| 1 | /* |
| 2 | * General DV muxer/demuxer |
| 3 | * Copyright (c) 2003 Roman Shaposhnik |
| 4 | * |
| 5 | * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth |
| 6 | * of DV technical info. |
| 7 | * |
| 8 | * Raw DV format |
| 9 | * Copyright (c) 2002 Fabrice Bellard |
| 10 | * |
| 11 | * 50 Mbps (DVCPRO50) support |
| 12 | * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com> |
| 13 | * |
| 14 | * This file is part of FFmpeg. |
| 15 | * |
| 16 | * FFmpeg is free software; you can redistribute it and/or |
| 17 | * modify it under the terms of the GNU Lesser General Public |
| 18 | * License as published by the Free Software Foundation; either |
| 19 | * version 2.1 of the License, or (at your option) any later version. |
| 20 | * |
| 21 | * FFmpeg is distributed in the hope that it will be useful, |
| 22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 24 | * Lesser General Public License for more details. |
| 25 | * |
| 26 | * You should have received a copy of the GNU Lesser General Public |
| 27 | * License along with FFmpeg; if not, write to the Free Software |
| 28 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 29 | */ |
| 30 | #include <time.h> |
| 31 | #include <stdarg.h> |
| 32 | |
| 33 | #include "avformat.h" |
| 34 | #include "internal.h" |
| 35 | #include "libavcodec/dv_profile.h" |
| 36 | #include "libavcodec/dv.h" |
| 37 | #include "dv.h" |
| 38 | #include "libavutil/fifo.h" |
| 39 | #include "libavutil/mathematics.h" |
| 40 | #include "libavutil/intreadwrite.h" |
| 41 | #include "libavutil/opt.h" |
| 42 | #include "libavutil/timecode.h" |
| 43 | |
| 44 | #define MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio |
| 45 | |
| 46 | struct DVMuxContext { |
| 47 | AVClass *av_class; |
| 48 | const AVDVProfile* sys; /* current DV profile, e.g.: 525/60, 625/50 */ |
| 49 | int n_ast; /* number of stereo audio streams (up to 2) */ |
| 50 | AVStream *ast[2]; /* stereo audio streams */ |
| 51 | AVFifoBuffer *audio_data[2]; /* FIFO for storing excessive amounts of PCM */ |
| 52 | int frames; /* current frame number */ |
| 53 | int64_t start_time; /* recording start time */ |
| 54 | int has_audio; /* frame under construction has audio */ |
| 55 | int has_video; /* frame under construction has video */ |
| 56 | uint8_t frame_buf[DV_MAX_FRAME_SIZE]; /* frame under construction */ |
| 57 | AVTimecode tc; /* timecode context */ |
| 58 | }; |
| 59 | |
| 60 | static const int dv_aaux_packs_dist[12][9] = { |
| 61 | { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff }, |
| 62 | { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff }, |
| 63 | { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff }, |
| 64 | { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff }, |
| 65 | { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff }, |
| 66 | { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff }, |
| 67 | { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff }, |
| 68 | { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff }, |
| 69 | { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff }, |
| 70 | { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff }, |
| 71 | { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff }, |
| 72 | { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff }, |
| 73 | }; |
| 74 | |
| 75 | static int dv_audio_frame_size(const AVDVProfile* sys, int frame, int sample_rate) |
| 76 | { |
| 77 | if ((sys->time_base.den == 25 || sys->time_base.den == 50) && sys->time_base.num == 1) { |
| 78 | if (sample_rate == 32000) return 1280; |
| 79 | else if (sample_rate == 44100) return 1764; |
| 80 | else return 1920; |
| 81 | } |
| 82 | |
| 83 | av_assert0(sample_rate == 48000); |
| 84 | |
| 85 | return sys->audio_samples_dist[frame % (sizeof(sys->audio_samples_dist) / |
| 86 | sizeof(sys->audio_samples_dist[0]))]; |
| 87 | } |
| 88 | |
| 89 | static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* buf, ...) |
| 90 | { |
| 91 | struct tm tc; |
| 92 | time_t ct; |
| 93 | uint32_t timecode; |
| 94 | va_list ap; |
| 95 | int audio_type = 0; |
| 96 | int channel; |
| 97 | |
| 98 | buf[0] = (uint8_t)pack_id; |
| 99 | switch (pack_id) { |
| 100 | case dv_timecode: |
| 101 | timecode = av_timecode_get_smpte_from_framenum(&c->tc, c->frames); |
| 102 | timecode |= 1<<23 | 1<<15 | 1<<7 | 1<<6; // biphase and binary group flags |
| 103 | AV_WB32(buf + 1, timecode); |
| 104 | break; |
| 105 | case dv_audio_source: /* AAUX source pack */ |
| 106 | va_start(ap, buf); |
| 107 | channel = va_arg(ap, int); |
| 108 | if (c->ast[channel]->codec->sample_rate == 44100) { |
| 109 | audio_type = 1; |
| 110 | } else if (c->ast[channel]->codec->sample_rate == 32000) |
| 111 | audio_type = 2; |
| 112 | buf[1] = (1 << 7) | /* locked mode -- SMPTE only supports locked mode */ |
| 113 | (1 << 6) | /* reserved -- always 1 */ |
| 114 | (dv_audio_frame_size(c->sys, c->frames, c->ast[channel]->codec->sample_rate) - |
| 115 | c->sys->audio_min_samples[audio_type]); |
| 116 | /* # of samples */ |
| 117 | buf[2] = (0 << 7) | /* multi-stereo */ |
| 118 | (0 << 5) | /* #of audio channels per block: 0 -- 1 channel */ |
| 119 | (0 << 4) | /* pair bit: 0 -- one pair of channels */ |
| 120 | !!va_arg(ap, int); /* audio mode */ |
| 121 | buf[3] = (1 << 7) | /* res */ |
| 122 | (1 << 6) | /* multi-language flag */ |
| 123 | (c->sys->dsf << 5) | /* system: 60fields/50fields */ |
| 124 | (c->sys->n_difchan & 2); /* definition: 0 -- 25Mbps, 2 -- 50Mbps */ |
| 125 | buf[4] = (1 << 7) | /* emphasis: 1 -- off */ |
| 126 | (0 << 6) | /* emphasis time constant: 0 -- reserved */ |
| 127 | (audio_type << 3) | /* frequency: 0 -- 48kHz, 1 -- 44,1kHz, 2 -- 32kHz */ |
| 128 | 0; /* quantization: 0 -- 16bit linear, 1 -- 12bit nonlinear */ |
| 129 | |
| 130 | va_end(ap); |
| 131 | break; |
| 132 | case dv_audio_control: |
| 133 | buf[1] = (0 << 6) | /* copy protection: 0 -- unrestricted */ |
| 134 | (1 << 4) | /* input source: 1 -- digital input */ |
| 135 | (3 << 2) | /* compression: 3 -- no information */ |
| 136 | 0; /* misc. info/SMPTE emphasis off */ |
| 137 | buf[2] = (1 << 7) | /* recording start point: 1 -- no */ |
| 138 | (1 << 6) | /* recording end point: 1 -- no */ |
| 139 | (1 << 3) | /* recording mode: 1 -- original */ |
| 140 | 7; |
| 141 | buf[3] = (1 << 7) | /* direction: 1 -- forward */ |
| 142 | (c->sys->pix_fmt == AV_PIX_FMT_YUV420P ? 0x20 : /* speed */ |
| 143 | c->sys->ltc_divisor * 4); |
| 144 | buf[4] = (1 << 7) | /* reserved -- always 1 */ |
| 145 | 0x7f; /* genre category */ |
| 146 | break; |
| 147 | case dv_audio_recdate: |
| 148 | case dv_video_recdate: /* VAUX recording date */ |
| 149 | ct = c->start_time + av_rescale_rnd(c->frames, c->sys->time_base.num, |
| 150 | c->sys->time_base.den, AV_ROUND_DOWN); |
| 151 | ff_brktimegm(ct, &tc); |
| 152 | buf[1] = 0xff; /* ds, tm, tens of time zone, units of time zone */ |
| 153 | /* 0xff is very likely to be "unknown" */ |
| 154 | buf[2] = (3 << 6) | /* reserved -- always 1 */ |
| 155 | ((tc.tm_mday / 10) << 4) | /* Tens of day */ |
| 156 | (tc.tm_mday % 10); /* Units of day */ |
| 157 | buf[3] = /* we set high 4 bits to 0, shouldn't we set them to week? */ |
| 158 | ((tc.tm_mon / 10) << 4) | /* Tens of month */ |
| 159 | (tc.tm_mon % 10); /* Units of month */ |
| 160 | buf[4] = (((tc.tm_year % 100) / 10) << 4) | /* Tens of year */ |
| 161 | (tc.tm_year % 10); /* Units of year */ |
| 162 | break; |
| 163 | case dv_audio_rectime: /* AAUX recording time */ |
| 164 | case dv_video_rectime: /* VAUX recording time */ |
| 165 | ct = c->start_time + av_rescale_rnd(c->frames, c->sys->time_base.num, |
| 166 | c->sys->time_base.den, AV_ROUND_DOWN); |
| 167 | ff_brktimegm(ct, &tc); |
| 168 | buf[1] = (3 << 6) | /* reserved -- always 1 */ |
| 169 | 0x3f; /* tens of frame, units of frame: 0x3f - "unknown" ? */ |
| 170 | buf[2] = (1 << 7) | /* reserved -- always 1 */ |
| 171 | ((tc.tm_sec / 10) << 4) | /* Tens of seconds */ |
| 172 | (tc.tm_sec % 10); /* Units of seconds */ |
| 173 | buf[3] = (1 << 7) | /* reserved -- always 1 */ |
| 174 | ((tc.tm_min / 10) << 4) | /* Tens of minutes */ |
| 175 | (tc.tm_min % 10); /* Units of minutes */ |
| 176 | buf[4] = (3 << 6) | /* reserved -- always 1 */ |
| 177 | ((tc.tm_hour / 10) << 4) | /* Tens of hours */ |
| 178 | (tc.tm_hour % 10); /* Units of hours */ |
| 179 | break; |
| 180 | default: |
| 181 | buf[1] = buf[2] = buf[3] = buf[4] = 0xff; |
| 182 | } |
| 183 | return 5; |
| 184 | } |
| 185 | |
| 186 | static void dv_inject_audio(DVMuxContext *c, int channel, uint8_t* frame_ptr) |
| 187 | { |
| 188 | int i, j, d, of, size; |
| 189 | size = 4 * dv_audio_frame_size(c->sys, c->frames, c->ast[channel]->codec->sample_rate); |
| 190 | frame_ptr += channel * c->sys->difseg_size * 150 * 80; |
| 191 | for (i = 0; i < c->sys->difseg_size; i++) { |
| 192 | frame_ptr += 6 * 80; /* skip DIF segment header */ |
| 193 | for (j = 0; j < 9; j++) { |
| 194 | dv_write_pack(dv_aaux_packs_dist[i][j], c, &frame_ptr[3], channel, i >= c->sys->difseg_size/2); |
| 195 | for (d = 8; d < 80; d+=2) { |
| 196 | of = c->sys->audio_shuffle[i][j] + (d - 8)/2 * c->sys->audio_stride; |
| 197 | if (of*2 >= size) |
| 198 | continue; |
| 199 | |
| 200 | frame_ptr[d] = *av_fifo_peek2(c->audio_data[channel], of*2+1); // FIXME: maybe we have to admit |
| 201 | frame_ptr[d+1] = *av_fifo_peek2(c->audio_data[channel], of*2); // that DV is a big-endian PCM |
| 202 | } |
| 203 | frame_ptr += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */ |
| 204 | } |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | static void dv_inject_metadata(DVMuxContext *c, uint8_t* frame) |
| 209 | { |
| 210 | int j, k; |
| 211 | uint8_t* buf; |
| 212 | |
| 213 | for (buf = frame; buf < frame + c->sys->frame_size; buf += 150 * 80) { |
| 214 | /* DV subcode: 2nd and 3d DIFs */ |
| 215 | for (j = 80; j < 80 * 3; j += 80) { |
| 216 | for (k = 6; k < 6 * 8; k += 8) |
| 217 | dv_write_pack(dv_timecode, c, &buf[j+k]); |
| 218 | |
| 219 | if (((long)(buf-frame)/(c->sys->frame_size/(c->sys->difseg_size*c->sys->n_difchan))%c->sys->difseg_size) > 5) { /* FIXME: is this really needed ? */ |
| 220 | dv_write_pack(dv_video_recdate, c, &buf[j+14]); |
| 221 | dv_write_pack(dv_video_rectime, c, &buf[j+22]); |
| 222 | dv_write_pack(dv_video_recdate, c, &buf[j+38]); |
| 223 | dv_write_pack(dv_video_rectime, c, &buf[j+46]); |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | /* DV VAUX: 4th, 5th and 6th 3DIFs */ |
| 228 | for (j = 80*3 + 3; j < 80*6; j += 80) { |
| 229 | dv_write_pack(dv_video_recdate, c, &buf[j+5*2]); |
| 230 | dv_write_pack(dv_video_rectime, c, &buf[j+5*3]); |
| 231 | dv_write_pack(dv_video_recdate, c, &buf[j+5*11]); |
| 232 | dv_write_pack(dv_video_rectime, c, &buf[j+5*12]); |
| 233 | } |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | /* |
| 238 | * The following 3 functions constitute our interface to the world |
| 239 | */ |
| 240 | |
| 241 | static int dv_assemble_frame(DVMuxContext *c, AVStream* st, |
| 242 | uint8_t* data, int data_size, uint8_t** frame) |
| 243 | { |
| 244 | int i, reqasize; |
| 245 | |
| 246 | *frame = &c->frame_buf[0]; |
| 247 | |
| 248 | switch (st->codec->codec_type) { |
| 249 | case AVMEDIA_TYPE_VIDEO: |
| 250 | /* FIXME: we have to have more sensible approach than this one */ |
| 251 | if (c->has_video) |
| 252 | av_log(st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient audio data or severe sync problem.\n", c->frames); |
| 253 | |
| 254 | memcpy(*frame, data, c->sys->frame_size); |
| 255 | c->has_video = 1; |
| 256 | break; |
| 257 | case AVMEDIA_TYPE_AUDIO: |
| 258 | for (i = 0; i < c->n_ast && st != c->ast[i]; i++); |
| 259 | |
| 260 | /* FIXME: we have to have more sensible approach than this one */ |
| 261 | if (av_fifo_size(c->audio_data[i]) + data_size >= 100*MAX_AUDIO_FRAME_SIZE) |
| 262 | av_log(st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient video data or severe sync problem.\n", c->frames); |
| 263 | av_fifo_generic_write(c->audio_data[i], data, data_size, NULL); |
| 264 | |
| 265 | reqasize = 4 * dv_audio_frame_size(c->sys, c->frames, st->codec->sample_rate); |
| 266 | |
| 267 | /* Let us see if we've got enough audio for one DV frame. */ |
| 268 | c->has_audio |= ((reqasize <= av_fifo_size(c->audio_data[i])) << i); |
| 269 | |
| 270 | break; |
| 271 | default: |
| 272 | break; |
| 273 | } |
| 274 | |
| 275 | /* Let us see if we have enough data to construct one DV frame. */ |
| 276 | if (c->has_video == 1 && c->has_audio + 1 == 1 << c->n_ast) { |
| 277 | dv_inject_metadata(c, *frame); |
| 278 | c->has_audio = 0; |
| 279 | for (i=0; i < c->n_ast; i++) { |
| 280 | dv_inject_audio(c, i, *frame); |
| 281 | reqasize = 4 * dv_audio_frame_size(c->sys, c->frames, c->ast[i]->codec->sample_rate); |
| 282 | av_fifo_drain(c->audio_data[i], reqasize); |
| 283 | c->has_audio |= ((reqasize <= av_fifo_size(c->audio_data[i])) << i); |
| 284 | } |
| 285 | |
| 286 | c->has_video = 0; |
| 287 | |
| 288 | c->frames++; |
| 289 | |
| 290 | return c->sys->frame_size; |
| 291 | } |
| 292 | |
| 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | static DVMuxContext* dv_init_mux(AVFormatContext* s) |
| 297 | { |
| 298 | DVMuxContext *c = s->priv_data; |
| 299 | AVStream *vst = NULL; |
| 300 | AVDictionaryEntry *t; |
| 301 | int i; |
| 302 | |
| 303 | /* we support at most 1 video and 2 audio streams */ |
| 304 | if (s->nb_streams > 3) |
| 305 | return NULL; |
| 306 | |
| 307 | c->n_ast = 0; |
| 308 | c->ast[0] = c->ast[1] = NULL; |
| 309 | |
| 310 | /* We have to sort out where audio and where video stream is */ |
| 311 | for (i=0; i<s->nb_streams; i++) { |
| 312 | switch (s->streams[i]->codec->codec_type) { |
| 313 | case AVMEDIA_TYPE_VIDEO: |
| 314 | if (vst) return NULL; |
| 315 | vst = s->streams[i]; |
| 316 | break; |
| 317 | case AVMEDIA_TYPE_AUDIO: |
| 318 | if (c->n_ast > 1) return NULL; |
| 319 | c->ast[c->n_ast++] = s->streams[i]; |
| 320 | break; |
| 321 | default: |
| 322 | goto bail_out; |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | /* Some checks -- DV format is very picky about its incoming streams */ |
| 327 | if (!vst || vst->codec->codec_id != AV_CODEC_ID_DVVIDEO) |
| 328 | goto bail_out; |
| 329 | for (i=0; i<c->n_ast; i++) { |
| 330 | if (c->ast[i]) { |
| 331 | if(c->ast[i]->codec->codec_id != AV_CODEC_ID_PCM_S16LE || |
| 332 | c->ast[i]->codec->channels != 2) |
| 333 | goto bail_out; |
| 334 | if (c->ast[i]->codec->sample_rate != 48000 && |
| 335 | c->ast[i]->codec->sample_rate != 44100 && |
| 336 | c->ast[i]->codec->sample_rate != 32000 ) |
| 337 | goto bail_out; |
| 338 | } |
| 339 | } |
| 340 | c->sys = av_dv_codec_profile(vst->codec->width, vst->codec->height, vst->codec->pix_fmt); |
| 341 | if (!c->sys) |
| 342 | goto bail_out; |
| 343 | |
| 344 | if ((c->sys->time_base.den != 25 && c->sys->time_base.den != 50) || c->sys->time_base.num != 1) { |
| 345 | if (c->ast[0] && c->ast[0]->codec->sample_rate != 48000) |
| 346 | goto bail_out; |
| 347 | if (c->ast[1] && c->ast[1]->codec->sample_rate != 48000) |
| 348 | goto bail_out; |
| 349 | } |
| 350 | |
| 351 | if ((c->n_ast > 1) && (c->sys->n_difchan < 2)) { |
| 352 | /* only 1 stereo pair is allowed in 25Mbps mode */ |
| 353 | goto bail_out; |
| 354 | } |
| 355 | |
| 356 | /* Ok, everything seems to be in working order */ |
| 357 | c->frames = 0; |
| 358 | c->has_audio = 0; |
| 359 | c->has_video = 0; |
| 360 | if (t = av_dict_get(s->metadata, "creation_time", NULL, 0)) |
| 361 | c->start_time = ff_iso8601_to_unix_time(t->value); |
| 362 | |
| 363 | for (i=0; i < c->n_ast; i++) { |
| 364 | if (c->ast[i] && !(c->audio_data[i]=av_fifo_alloc_array(100, MAX_AUDIO_FRAME_SIZE))) { |
| 365 | while (i > 0) { |
| 366 | i--; |
| 367 | av_fifo_freep(&c->audio_data[i]); |
| 368 | } |
| 369 | goto bail_out; |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | return c; |
| 374 | |
| 375 | bail_out: |
| 376 | return NULL; |
| 377 | } |
| 378 | |
| 379 | static void dv_delete_mux(DVMuxContext *c) |
| 380 | { |
| 381 | int i; |
| 382 | for (i=0; i < c->n_ast; i++) |
| 383 | av_fifo_freep(&c->audio_data[i]); |
| 384 | } |
| 385 | |
| 386 | static int dv_write_header(AVFormatContext *s) |
| 387 | { |
| 388 | AVRational rate; |
| 389 | DVMuxContext *dvc = s->priv_data; |
| 390 | AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0); |
| 391 | |
| 392 | if (!dv_init_mux(s)) { |
| 393 | av_log(s, AV_LOG_ERROR, "Can't initialize DV format!\n" |
| 394 | "Make sure that you supply exactly two streams:\n" |
| 395 | " video: 25fps or 29.97fps, audio: 2ch/48|44|32kHz/PCM\n" |
| 396 | " (50Mbps allows an optional second audio stream)\n"); |
| 397 | return -1; |
| 398 | } |
| 399 | rate.num = dvc->sys->ltc_divisor; |
| 400 | rate.den = 1; |
| 401 | if (!tcr) { // no global timecode, look into the streams |
| 402 | int i; |
| 403 | for (i = 0; i < s->nb_streams; i++) { |
| 404 | tcr = av_dict_get(s->streams[i]->metadata, "timecode", NULL, 0); |
| 405 | if (tcr) |
| 406 | break; |
| 407 | } |
| 408 | } |
| 409 | if (tcr && av_timecode_init_from_string(&dvc->tc, rate, tcr->value, s) >= 0) |
| 410 | return 0; |
| 411 | return av_timecode_init(&dvc->tc, rate, 0, 0, s); |
| 412 | } |
| 413 | |
| 414 | static int dv_write_packet(struct AVFormatContext *s, AVPacket *pkt) |
| 415 | { |
| 416 | uint8_t* frame; |
| 417 | int fsize; |
| 418 | |
| 419 | fsize = dv_assemble_frame(s->priv_data, s->streams[pkt->stream_index], |
| 420 | pkt->data, pkt->size, &frame); |
| 421 | if (fsize > 0) { |
| 422 | avio_write(s->pb, frame, fsize); |
| 423 | } |
| 424 | return 0; |
| 425 | } |
| 426 | |
| 427 | /* |
| 428 | * We might end up with some extra A/V data without matching counterpart. |
| 429 | * E.g. video data without enough audio to write the complete frame. |
| 430 | * Currently we simply drop the last frame. I don't know whether this |
| 431 | * is the best strategy of all |
| 432 | */ |
| 433 | static int dv_write_trailer(struct AVFormatContext *s) |
| 434 | { |
| 435 | dv_delete_mux(s->priv_data); |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | AVOutputFormat ff_dv_muxer = { |
| 440 | .name = "dv", |
| 441 | .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"), |
| 442 | .extensions = "dv", |
| 443 | .priv_data_size = sizeof(DVMuxContext), |
| 444 | .audio_codec = AV_CODEC_ID_PCM_S16LE, |
| 445 | .video_codec = AV_CODEC_ID_DVVIDEO, |
| 446 | .write_header = dv_write_header, |
| 447 | .write_packet = dv_write_packet, |
| 448 | .write_trailer = dv_write_trailer, |
| 449 | }; |