| 1 | /* |
| 2 | * AVI muxer |
| 3 | * Copyright (c) 2000 Fabrice Bellard |
| 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 | //#define DEBUG |
| 23 | |
| 24 | #include "avformat.h" |
| 25 | #include "internal.h" |
| 26 | #include "avi.h" |
| 27 | #include "avio_internal.h" |
| 28 | #include "riff.h" |
| 29 | #include "mpegts.h" |
| 30 | #include "libavformat/avlanguage.h" |
| 31 | #include "libavutil/avstring.h" |
| 32 | #include "libavutil/intreadwrite.h" |
| 33 | #include "libavutil/dict.h" |
| 34 | #include "libavutil/avassert.h" |
| 35 | #include "libavutil/timestamp.h" |
| 36 | #include "libavutil/pixdesc.h" |
| 37 | #include "libavcodec/raw.h" |
| 38 | |
| 39 | /* |
| 40 | * TODO: |
| 41 | * - fill all fields if non streamed (nb_frames for example) |
| 42 | */ |
| 43 | |
| 44 | typedef struct AVIIentry { |
| 45 | unsigned int flags, pos, len; |
| 46 | } AVIIentry; |
| 47 | |
| 48 | #define AVI_INDEX_CLUSTER_SIZE 16384 |
| 49 | |
| 50 | typedef struct AVIIndex { |
| 51 | int64_t indx_start; |
| 52 | int entry; |
| 53 | int ents_allocated; |
| 54 | AVIIentry** cluster; |
| 55 | } AVIIndex; |
| 56 | |
| 57 | typedef struct { |
| 58 | int64_t riff_start, movi_list, odml_list; |
| 59 | int64_t frames_hdr_all; |
| 60 | int riff_id; |
| 61 | } AVIContext; |
| 62 | |
| 63 | typedef struct { |
| 64 | int64_t frames_hdr_strm; |
| 65 | int64_t audio_strm_length; |
| 66 | int packet_count; |
| 67 | int entry; |
| 68 | int max_size; |
| 69 | |
| 70 | int64_t last_dts; |
| 71 | |
| 72 | AVIIndex indexes; |
| 73 | } AVIStream; |
| 74 | |
| 75 | static int avi_write_packet(AVFormatContext *s, AVPacket *pkt); |
| 76 | |
| 77 | static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id) |
| 78 | { |
| 79 | int cl = ent_id / AVI_INDEX_CLUSTER_SIZE; |
| 80 | int id = ent_id % AVI_INDEX_CLUSTER_SIZE; |
| 81 | return &idx->cluster[cl][id]; |
| 82 | } |
| 83 | |
| 84 | static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb, |
| 85 | const char *riff_tag, const char *list_tag) |
| 86 | { |
| 87 | AVIContext *avi = s->priv_data; |
| 88 | int64_t loff; |
| 89 | int i; |
| 90 | |
| 91 | avi->riff_id++; |
| 92 | for (i = 0; i < s->nb_streams; i++) { |
| 93 | AVIStream *avist = s->streams[i]->priv_data; |
| 94 | avist->indexes.entry = 0; |
| 95 | } |
| 96 | |
| 97 | avi->riff_start = ff_start_tag(pb, "RIFF"); |
| 98 | ffio_wfourcc(pb, riff_tag); |
| 99 | loff = ff_start_tag(pb, "LIST"); |
| 100 | ffio_wfourcc(pb, list_tag); |
| 101 | return loff; |
| 102 | } |
| 103 | |
| 104 | static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type) |
| 105 | { |
| 106 | tag[0] = '0' + index / 10; |
| 107 | tag[1] = '0' + index % 10; |
| 108 | if (type == AVMEDIA_TYPE_VIDEO) { |
| 109 | tag[2] = 'd'; |
| 110 | tag[3] = 'c'; |
| 111 | } else if (type == AVMEDIA_TYPE_SUBTITLE) { |
| 112 | // note: this is not an official code |
| 113 | tag[2] = 's'; |
| 114 | tag[3] = 'b'; |
| 115 | } else { |
| 116 | tag[2] = 'w'; |
| 117 | tag[3] = 'b'; |
| 118 | } |
| 119 | tag[4] = '\0'; |
| 120 | return tag; |
| 121 | } |
| 122 | |
| 123 | static int avi_write_counters(AVFormatContext *s, int riff_id) |
| 124 | { |
| 125 | AVIOContext *pb = s->pb; |
| 126 | AVIContext *avi = s->priv_data; |
| 127 | int n, au_byterate, au_ssize, au_scale, nb_frames = 0; |
| 128 | int64_t file_size; |
| 129 | AVCodecContext *stream; |
| 130 | |
| 131 | file_size = avio_tell(pb); |
| 132 | for (n = 0; n < s->nb_streams; n++) { |
| 133 | AVIStream *avist = s->streams[n]->priv_data; |
| 134 | |
| 135 | av_assert0(avist->frames_hdr_strm); |
| 136 | stream = s->streams[n]->codec; |
| 137 | avio_seek(pb, avist->frames_hdr_strm, SEEK_SET); |
| 138 | ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale); |
| 139 | if (au_ssize == 0) |
| 140 | avio_wl32(pb, avist->packet_count); |
| 141 | else |
| 142 | avio_wl32(pb, avist->audio_strm_length / au_ssize); |
| 143 | if (stream->codec_type == AVMEDIA_TYPE_VIDEO) |
| 144 | nb_frames = FFMAX(nb_frames, avist->packet_count); |
| 145 | } |
| 146 | if (riff_id == 1) { |
| 147 | av_assert0(avi->frames_hdr_all); |
| 148 | avio_seek(pb, avi->frames_hdr_all, SEEK_SET); |
| 149 | avio_wl32(pb, nb_frames); |
| 150 | } |
| 151 | avio_seek(pb, file_size, SEEK_SET); |
| 152 | |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | static int avi_write_header(AVFormatContext *s) |
| 157 | { |
| 158 | AVIContext *avi = s->priv_data; |
| 159 | AVIOContext *pb = s->pb; |
| 160 | int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale; |
| 161 | AVCodecContext *video_enc; |
| 162 | AVStream *video_st = NULL; |
| 163 | int64_t list1, list2, strh, strf; |
| 164 | AVDictionaryEntry *t = NULL; |
| 165 | int padding; |
| 166 | |
| 167 | if (s->nb_streams > AVI_MAX_STREAM_COUNT) { |
| 168 | av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n", |
| 169 | AVI_MAX_STREAM_COUNT); |
| 170 | return AVERROR(EINVAL); |
| 171 | } |
| 172 | |
| 173 | for (n = 0; n < s->nb_streams; n++) { |
| 174 | s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream)); |
| 175 | if (!s->streams[n]->priv_data) |
| 176 | return AVERROR(ENOMEM); |
| 177 | } |
| 178 | |
| 179 | /* header list */ |
| 180 | avi->riff_id = 0; |
| 181 | list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl"); |
| 182 | |
| 183 | /* avi header */ |
| 184 | ffio_wfourcc(pb, "avih"); |
| 185 | avio_wl32(pb, 14 * 4); |
| 186 | bitrate = 0; |
| 187 | |
| 188 | video_enc = NULL; |
| 189 | for (n = 0; n < s->nb_streams; n++) { |
| 190 | AVCodecContext *codec = s->streams[n]->codec; |
| 191 | bitrate += codec->bit_rate; |
| 192 | if (codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| 193 | video_enc = codec; |
| 194 | video_st = s->streams[n]; |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | nb_frames = 0; |
| 199 | |
| 200 | // TODO: should be avg_frame_rate |
| 201 | if (video_st) |
| 202 | avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num / |
| 203 | video_st->time_base.den)); |
| 204 | else |
| 205 | avio_wl32(pb, 0); |
| 206 | avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */ |
| 207 | avio_wl32(pb, 0); /* padding */ |
| 208 | if (!pb->seekable) |
| 209 | avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */ |
| 210 | else |
| 211 | avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */ |
| 212 | avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */ |
| 213 | avio_wl32(pb, nb_frames); /* nb frames, filled later */ |
| 214 | avio_wl32(pb, 0); /* initial frame */ |
| 215 | avio_wl32(pb, s->nb_streams); /* nb streams */ |
| 216 | avio_wl32(pb, 1024 * 1024); /* suggested buffer size */ |
| 217 | if (video_enc) { |
| 218 | avio_wl32(pb, video_enc->width); |
| 219 | avio_wl32(pb, video_enc->height); |
| 220 | } else { |
| 221 | avio_wl32(pb, 0); |
| 222 | avio_wl32(pb, 0); |
| 223 | } |
| 224 | avio_wl32(pb, 0); /* reserved */ |
| 225 | avio_wl32(pb, 0); /* reserved */ |
| 226 | avio_wl32(pb, 0); /* reserved */ |
| 227 | avio_wl32(pb, 0); /* reserved */ |
| 228 | |
| 229 | /* stream list */ |
| 230 | for (i = 0; i < n; i++) { |
| 231 | AVStream *st = s->streams[i]; |
| 232 | AVCodecContext *enc = st->codec; |
| 233 | AVIStream *avist = st->priv_data; |
| 234 | list2 = ff_start_tag(pb, "LIST"); |
| 235 | ffio_wfourcc(pb, "strl"); |
| 236 | |
| 237 | /* stream generic header */ |
| 238 | strh = ff_start_tag(pb, "strh"); |
| 239 | switch (enc->codec_type) { |
| 240 | case AVMEDIA_TYPE_SUBTITLE: |
| 241 | // XSUB subtitles behave like video tracks, other subtitles |
| 242 | // are not (yet) supported. |
| 243 | if (enc->codec_id != AV_CODEC_ID_XSUB) { |
| 244 | av_log(s, AV_LOG_ERROR, |
| 245 | "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n"); |
| 246 | return AVERROR_PATCHWELCOME; |
| 247 | } |
| 248 | case AVMEDIA_TYPE_VIDEO: |
| 249 | ffio_wfourcc(pb, "vids"); |
| 250 | break; |
| 251 | case AVMEDIA_TYPE_AUDIO: |
| 252 | ffio_wfourcc(pb, "auds"); |
| 253 | break; |
| 254 | // case AVMEDIA_TYPE_TEXT: |
| 255 | // ffio_wfourcc(pb, "txts"); |
| 256 | // break; |
| 257 | case AVMEDIA_TYPE_DATA: |
| 258 | ffio_wfourcc(pb, "dats"); |
| 259 | break; |
| 260 | } |
| 261 | if (enc->codec_type == AVMEDIA_TYPE_VIDEO || |
| 262 | enc->codec_id == AV_CODEC_ID_XSUB) |
| 263 | avio_wl32(pb, enc->codec_tag); |
| 264 | else |
| 265 | avio_wl32(pb, 1); |
| 266 | avio_wl32(pb, 0); /* flags */ |
| 267 | avio_wl16(pb, 0); /* priority */ |
| 268 | avio_wl16(pb, 0); /* language */ |
| 269 | avio_wl32(pb, 0); /* initial frame */ |
| 270 | |
| 271 | ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale); |
| 272 | |
| 273 | if ( enc->codec_type == AVMEDIA_TYPE_VIDEO |
| 274 | && enc->codec_id != AV_CODEC_ID_XSUB |
| 275 | && au_byterate > 1000LL*au_scale) { |
| 276 | au_byterate = 600; |
| 277 | au_scale = 1; |
| 278 | } |
| 279 | avpriv_set_pts_info(st, 64, au_scale, au_byterate); |
| 280 | if (enc->codec_id == AV_CODEC_ID_XSUB) |
| 281 | au_scale = au_byterate = 0; |
| 282 | |
| 283 | avio_wl32(pb, au_scale); /* scale */ |
| 284 | avio_wl32(pb, au_byterate); /* rate */ |
| 285 | |
| 286 | avio_wl32(pb, 0); /* start */ |
| 287 | /* remember this offset to fill later */ |
| 288 | avist->frames_hdr_strm = avio_tell(pb); |
| 289 | if (!pb->seekable) |
| 290 | /* FIXME: this may be broken, but who cares */ |
| 291 | avio_wl32(pb, AVI_MAX_RIFF_SIZE); |
| 292 | else |
| 293 | avio_wl32(pb, 0); /* length, XXX: filled later */ |
| 294 | |
| 295 | /* suggested buffer size, is set to largest chunk size in avi_write_trailer */ |
| 296 | if (enc->codec_type == AVMEDIA_TYPE_VIDEO) |
| 297 | avio_wl32(pb, 1024 * 1024); |
| 298 | else if (enc->codec_type == AVMEDIA_TYPE_AUDIO) |
| 299 | avio_wl32(pb, 12 * 1024); |
| 300 | else |
| 301 | avio_wl32(pb, 0); |
| 302 | avio_wl32(pb, -1); /* quality */ |
| 303 | avio_wl32(pb, au_ssize); /* sample size */ |
| 304 | avio_wl32(pb, 0); |
| 305 | avio_wl16(pb, enc->width); |
| 306 | avio_wl16(pb, enc->height); |
| 307 | ff_end_tag(pb, strh); |
| 308 | |
| 309 | if (enc->codec_type != AVMEDIA_TYPE_DATA) { |
| 310 | int ret; |
| 311 | enum AVPixelFormat pix_fmt; |
| 312 | |
| 313 | strf = ff_start_tag(pb, "strf"); |
| 314 | switch (enc->codec_type) { |
| 315 | case AVMEDIA_TYPE_SUBTITLE: |
| 316 | /* XSUB subtitles behave like video tracks, other subtitles |
| 317 | * are not (yet) supported. */ |
| 318 | if (enc->codec_id != AV_CODEC_ID_XSUB) |
| 319 | break; |
| 320 | case AVMEDIA_TYPE_VIDEO: |
| 321 | /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */ |
| 322 | if ( !enc->codec_tag |
| 323 | && enc->codec_id == AV_CODEC_ID_RAWVIDEO |
| 324 | && enc->pix_fmt == AV_PIX_FMT_RGB555LE |
| 325 | && enc->bits_per_coded_sample == 15) |
| 326 | enc->bits_per_coded_sample = 16; |
| 327 | ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 0, 0); |
| 328 | pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi, |
| 329 | enc->bits_per_coded_sample); |
| 330 | if ( !enc->codec_tag |
| 331 | && enc->codec_id == AV_CODEC_ID_RAWVIDEO |
| 332 | && enc->pix_fmt != pix_fmt |
| 333 | && enc->pix_fmt != AV_PIX_FMT_NONE) |
| 334 | av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n", |
| 335 | av_get_pix_fmt_name(enc->pix_fmt)); |
| 336 | break; |
| 337 | case AVMEDIA_TYPE_AUDIO: |
| 338 | if ((ret = ff_put_wav_header(pb, enc, 0)) < 0) |
| 339 | return ret; |
| 340 | break; |
| 341 | default: |
| 342 | av_log(s, AV_LOG_ERROR, |
| 343 | "Invalid or not supported codec type '%s' found in the input\n", |
| 344 | (char *)av_x_if_null(av_get_media_type_string(enc->codec_type), "?")); |
| 345 | return AVERROR(EINVAL); |
| 346 | } |
| 347 | ff_end_tag(pb, strf); |
| 348 | if ((t = av_dict_get(st->metadata, "title", NULL, 0))) { |
| 349 | ff_riff_write_info_tag(s->pb, "strn", t->value); |
| 350 | t = NULL; |
| 351 | } |
| 352 | if (enc->codec_id == AV_CODEC_ID_XSUB |
| 353 | && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) { |
| 354 | const char* langstr = av_convert_lang_to(t->value, AV_LANG_ISO639_1); |
| 355 | t = NULL; |
| 356 | if (langstr) { |
| 357 | char* str = av_asprintf("Subtitle - %s-xx;02", langstr); |
| 358 | ff_riff_write_info_tag(s->pb, "strn", str); |
| 359 | av_free(str); |
| 360 | } |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | if (pb->seekable) { |
| 365 | unsigned char tag[5]; |
| 366 | int j; |
| 367 | |
| 368 | /* Starting to lay out AVI OpenDML master index. |
| 369 | * We want to make it JUNK entry for now, since we'd |
| 370 | * like to get away without making AVI an OpenDML one |
| 371 | * for compatibility reasons. */ |
| 372 | avist->indexes.entry = avist->indexes.ents_allocated = 0; |
| 373 | avist->indexes.indx_start = ff_start_tag(pb, "JUNK"); |
| 374 | avio_wl16(pb, 4); /* wLongsPerEntry */ |
| 375 | avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */ |
| 376 | avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */ |
| 377 | avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */ |
| 378 | ffio_wfourcc(pb, avi_stream2fourcc(tag, i, enc->codec_type)); |
| 379 | /* dwChunkId */ |
| 380 | avio_wl64(pb, 0); /* dwReserved[3] */ |
| 381 | // avio_wl32(pb, 0); /* Must be 0. */ |
| 382 | for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++) |
| 383 | avio_wl64(pb, 0); |
| 384 | ff_end_tag(pb, avist->indexes.indx_start); |
| 385 | } |
| 386 | |
| 387 | if (enc->codec_type == AVMEDIA_TYPE_VIDEO && |
| 388 | st->sample_aspect_ratio.num > 0 && |
| 389 | st->sample_aspect_ratio.den > 0) { |
| 390 | int vprp = ff_start_tag(pb, "vprp"); |
| 391 | AVRational dar = av_mul_q(st->sample_aspect_ratio, |
| 392 | (AVRational) { enc->width, |
| 393 | enc->height }); |
| 394 | int num, den; |
| 395 | av_reduce(&num, &den, dar.num, dar.den, 0xFFFF); |
| 396 | |
| 397 | avio_wl32(pb, 0); // video format = unknown |
| 398 | avio_wl32(pb, 0); // video standard = unknown |
| 399 | // TODO: should be avg_frame_rate |
| 400 | avio_wl32(pb, lrintf(1.0 / av_q2d(st->time_base))); |
| 401 | avio_wl32(pb, enc->width); |
| 402 | avio_wl32(pb, enc->height); |
| 403 | avio_wl16(pb, den); |
| 404 | avio_wl16(pb, num); |
| 405 | avio_wl32(pb, enc->width); |
| 406 | avio_wl32(pb, enc->height); |
| 407 | avio_wl32(pb, 1); // progressive FIXME |
| 408 | |
| 409 | avio_wl32(pb, enc->height); |
| 410 | avio_wl32(pb, enc->width); |
| 411 | avio_wl32(pb, enc->height); |
| 412 | avio_wl32(pb, enc->width); |
| 413 | avio_wl32(pb, 0); |
| 414 | avio_wl32(pb, 0); |
| 415 | |
| 416 | avio_wl32(pb, 0); |
| 417 | avio_wl32(pb, 0); |
| 418 | ff_end_tag(pb, vprp); |
| 419 | } |
| 420 | |
| 421 | ff_end_tag(pb, list2); |
| 422 | } |
| 423 | |
| 424 | if (pb->seekable) { |
| 425 | /* AVI could become an OpenDML one, if it grows beyond 2Gb range */ |
| 426 | avi->odml_list = ff_start_tag(pb, "JUNK"); |
| 427 | ffio_wfourcc(pb, "odml"); |
| 428 | ffio_wfourcc(pb, "dmlh"); |
| 429 | avio_wl32(pb, 248); |
| 430 | for (i = 0; i < 248; i += 4) |
| 431 | avio_wl32(pb, 0); |
| 432 | ff_end_tag(pb, avi->odml_list); |
| 433 | } |
| 434 | |
| 435 | ff_end_tag(pb, list1); |
| 436 | |
| 437 | ff_riff_write_info(s); |
| 438 | |
| 439 | |
| 440 | padding = s->metadata_header_padding; |
| 441 | if (padding < 0) |
| 442 | padding = 1016; |
| 443 | |
| 444 | /* some padding for easier tag editing */ |
| 445 | if (padding) { |
| 446 | list2 = ff_start_tag(pb, "JUNK"); |
| 447 | for (i = padding; i > 0; i -= 4) |
| 448 | avio_wl32(pb, 0); |
| 449 | ff_end_tag(pb, list2); |
| 450 | } |
| 451 | |
| 452 | avi->movi_list = ff_start_tag(pb, "LIST"); |
| 453 | ffio_wfourcc(pb, "movi"); |
| 454 | |
| 455 | avio_flush(pb); |
| 456 | |
| 457 | return 0; |
| 458 | } |
| 459 | |
| 460 | static int avi_write_ix(AVFormatContext *s) |
| 461 | { |
| 462 | AVIOContext *pb = s->pb; |
| 463 | AVIContext *avi = s->priv_data; |
| 464 | char tag[5]; |
| 465 | char ix_tag[] = "ix00"; |
| 466 | int i, j; |
| 467 | |
| 468 | av_assert0(pb->seekable); |
| 469 | |
| 470 | if (avi->riff_id > AVI_MASTER_INDEX_SIZE) { |
| 471 | av_log(s, AV_LOG_ERROR, "Invalid riff index %d > %d\n", |
| 472 | avi->riff_id, AVI_MASTER_INDEX_SIZE); |
| 473 | return AVERROR(EINVAL); |
| 474 | } |
| 475 | |
| 476 | for (i = 0; i < s->nb_streams; i++) { |
| 477 | AVIStream *avist = s->streams[i]->priv_data; |
| 478 | int64_t ix, pos; |
| 479 | |
| 480 | avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type); |
| 481 | ix_tag[3] = '0' + i; |
| 482 | |
| 483 | /* Writing AVI OpenDML leaf index chunk */ |
| 484 | ix = avio_tell(pb); |
| 485 | ffio_wfourcc(pb, ix_tag); /* ix?? */ |
| 486 | avio_wl32(pb, avist->indexes.entry * 8 + 24); |
| 487 | /* chunk size */ |
| 488 | avio_wl16(pb, 2); /* wLongsPerEntry */ |
| 489 | avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */ |
| 490 | avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */ |
| 491 | avio_wl32(pb, avist->indexes.entry); |
| 492 | /* nEntriesInUse */ |
| 493 | ffio_wfourcc(pb, tag); /* dwChunkId */ |
| 494 | avio_wl64(pb, avi->movi_list); /* qwBaseOffset */ |
| 495 | avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */ |
| 496 | |
| 497 | for (j = 0; j < avist->indexes.entry; j++) { |
| 498 | AVIIentry *ie = avi_get_ientry(&avist->indexes, j); |
| 499 | avio_wl32(pb, ie->pos + 8); |
| 500 | avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) | |
| 501 | (ie->flags & 0x10 ? 0 : 0x80000000)); |
| 502 | } |
| 503 | avio_flush(pb); |
| 504 | pos = avio_tell(pb); |
| 505 | |
| 506 | /* Updating one entry in the AVI OpenDML master index */ |
| 507 | avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET); |
| 508 | ffio_wfourcc(pb, "indx"); /* enabling this entry */ |
| 509 | avio_skip(pb, 8); |
| 510 | avio_wl32(pb, avi->riff_id); /* nEntriesInUse */ |
| 511 | avio_skip(pb, 16 * avi->riff_id); |
| 512 | avio_wl64(pb, ix); /* qwOffset */ |
| 513 | avio_wl32(pb, pos - ix); /* dwSize */ |
| 514 | avio_wl32(pb, avist->indexes.entry); /* dwDuration */ |
| 515 | |
| 516 | avio_seek(pb, pos, SEEK_SET); |
| 517 | } |
| 518 | return 0; |
| 519 | } |
| 520 | |
| 521 | static int avi_write_idx1(AVFormatContext *s) |
| 522 | { |
| 523 | AVIOContext *pb = s->pb; |
| 524 | AVIContext *avi = s->priv_data; |
| 525 | int64_t idx_chunk; |
| 526 | int i; |
| 527 | char tag[5]; |
| 528 | |
| 529 | if (pb->seekable) { |
| 530 | AVIStream *avist; |
| 531 | AVIIentry *ie = 0, *tie; |
| 532 | int empty, stream_id = -1; |
| 533 | |
| 534 | idx_chunk = ff_start_tag(pb, "idx1"); |
| 535 | for (i = 0; i < s->nb_streams; i++) { |
| 536 | avist = s->streams[i]->priv_data; |
| 537 | avist->entry = 0; |
| 538 | } |
| 539 | |
| 540 | do { |
| 541 | empty = 1; |
| 542 | for (i = 0; i < s->nb_streams; i++) { |
| 543 | avist = s->streams[i]->priv_data; |
| 544 | if (avist->indexes.entry <= avist->entry) |
| 545 | continue; |
| 546 | |
| 547 | tie = avi_get_ientry(&avist->indexes, avist->entry); |
| 548 | if (empty || tie->pos < ie->pos) { |
| 549 | ie = tie; |
| 550 | stream_id = i; |
| 551 | } |
| 552 | empty = 0; |
| 553 | } |
| 554 | if (!empty) { |
| 555 | avist = s->streams[stream_id]->priv_data; |
| 556 | avi_stream2fourcc(tag, stream_id, |
| 557 | s->streams[stream_id]->codec->codec_type); |
| 558 | ffio_wfourcc(pb, tag); |
| 559 | avio_wl32(pb, ie->flags); |
| 560 | avio_wl32(pb, ie->pos); |
| 561 | avio_wl32(pb, ie->len); |
| 562 | avist->entry++; |
| 563 | } |
| 564 | } while (!empty); |
| 565 | ff_end_tag(pb, idx_chunk); |
| 566 | |
| 567 | avi_write_counters(s, avi->riff_id); |
| 568 | } |
| 569 | return 0; |
| 570 | } |
| 571 | |
| 572 | static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts) |
| 573 | { |
| 574 | AVIStream *avist = s->streams[stream_index]->priv_data; |
| 575 | AVCodecContext *enc = s->streams[stream_index]->codec; |
| 576 | |
| 577 | av_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index); |
| 578 | while (enc->block_align == 0 && dts != AV_NOPTS_VALUE && |
| 579 | dts > avist->packet_count && enc->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) { |
| 580 | AVPacket empty_packet; |
| 581 | |
| 582 | if (dts - avist->packet_count > 60000) { |
| 583 | av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count); |
| 584 | return AVERROR(EINVAL); |
| 585 | } |
| 586 | |
| 587 | av_init_packet(&empty_packet); |
| 588 | empty_packet.size = 0; |
| 589 | empty_packet.data = NULL; |
| 590 | empty_packet.stream_index = stream_index; |
| 591 | avi_write_packet(s, &empty_packet); |
| 592 | av_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count); |
| 593 | } |
| 594 | |
| 595 | return 0; |
| 596 | } |
| 597 | |
| 598 | static int avi_write_packet(AVFormatContext *s, AVPacket *pkt) |
| 599 | { |
| 600 | unsigned char tag[5]; |
| 601 | unsigned int flags = 0; |
| 602 | const int stream_index = pkt->stream_index; |
| 603 | int size = pkt->size; |
| 604 | AVIContext *avi = s->priv_data; |
| 605 | AVIOContext *pb = s->pb; |
| 606 | AVIStream *avist = s->streams[stream_index]->priv_data; |
| 607 | AVCodecContext *enc = s->streams[stream_index]->codec; |
| 608 | int ret; |
| 609 | |
| 610 | if (enc->codec_id == AV_CODEC_ID_H264 && enc->codec_tag == MKTAG('H','2','6','4') && pkt->size) { |
| 611 | ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt); |
| 612 | if (ret < 0) |
| 613 | return ret; |
| 614 | } |
| 615 | |
| 616 | if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0) |
| 617 | return ret; |
| 618 | |
| 619 | if (pkt->dts != AV_NOPTS_VALUE) |
| 620 | avist->last_dts = pkt->dts + pkt->duration; |
| 621 | |
| 622 | avist->packet_count++; |
| 623 | |
| 624 | // Make sure to put an OpenDML chunk when the file size exceeds the limits |
| 625 | if (pb->seekable && |
| 626 | (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) { |
| 627 | avi_write_ix(s); |
| 628 | ff_end_tag(pb, avi->movi_list); |
| 629 | |
| 630 | if (avi->riff_id == 1) |
| 631 | avi_write_idx1(s); |
| 632 | |
| 633 | ff_end_tag(pb, avi->riff_start); |
| 634 | avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi"); |
| 635 | } |
| 636 | |
| 637 | avi_stream2fourcc(tag, stream_index, enc->codec_type); |
| 638 | if (pkt->flags & AV_PKT_FLAG_KEY) |
| 639 | flags = 0x10; |
| 640 | if (enc->codec_type == AVMEDIA_TYPE_AUDIO) |
| 641 | avist->audio_strm_length += size; |
| 642 | |
| 643 | if (s->pb->seekable) { |
| 644 | AVIIndex *idx = &avist->indexes; |
| 645 | int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE; |
| 646 | int id = idx->entry % AVI_INDEX_CLUSTER_SIZE; |
| 647 | if (idx->ents_allocated <= idx->entry) { |
| 648 | idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1); |
| 649 | if (!idx->cluster) { |
| 650 | idx->ents_allocated = 0; |
| 651 | idx->entry = 0; |
| 652 | return AVERROR(ENOMEM); |
| 653 | } |
| 654 | idx->cluster[cl] = |
| 655 | av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry)); |
| 656 | if (!idx->cluster[cl]) |
| 657 | return AVERROR(ENOMEM); |
| 658 | idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE; |
| 659 | } |
| 660 | |
| 661 | idx->cluster[cl][id].flags = flags; |
| 662 | idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list; |
| 663 | idx->cluster[cl][id].len = size; |
| 664 | avist->max_size = FFMAX(avist->max_size, size); |
| 665 | idx->entry++; |
| 666 | } |
| 667 | |
| 668 | avio_write(pb, tag, 4); |
| 669 | avio_wl32(pb, size); |
| 670 | avio_write(pb, pkt->data, size); |
| 671 | if (size & 1) |
| 672 | avio_w8(pb, 0); |
| 673 | |
| 674 | return 0; |
| 675 | } |
| 676 | |
| 677 | static int avi_write_trailer(AVFormatContext *s) |
| 678 | { |
| 679 | AVIContext *avi = s->priv_data; |
| 680 | AVIOContext *pb = s->pb; |
| 681 | int res = 0; |
| 682 | int i, j, n, nb_frames; |
| 683 | int64_t file_size; |
| 684 | |
| 685 | for (i = 0; i < s->nb_streams; i++) { |
| 686 | AVIStream *avist = s->streams[i]->priv_data; |
| 687 | write_skip_frames(s, i, avist->last_dts); |
| 688 | } |
| 689 | |
| 690 | if (pb->seekable) { |
| 691 | if (avi->riff_id == 1) { |
| 692 | ff_end_tag(pb, avi->movi_list); |
| 693 | res = avi_write_idx1(s); |
| 694 | ff_end_tag(pb, avi->riff_start); |
| 695 | } else { |
| 696 | avi_write_ix(s); |
| 697 | ff_end_tag(pb, avi->movi_list); |
| 698 | ff_end_tag(pb, avi->riff_start); |
| 699 | |
| 700 | file_size = avio_tell(pb); |
| 701 | avio_seek(pb, avi->odml_list - 8, SEEK_SET); |
| 702 | ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */ |
| 703 | avio_skip(pb, 16); |
| 704 | |
| 705 | for (n = nb_frames = 0; n < s->nb_streams; n++) { |
| 706 | AVCodecContext *stream = s->streams[n]->codec; |
| 707 | AVIStream *avist = s->streams[n]->priv_data; |
| 708 | |
| 709 | if (stream->codec_type == AVMEDIA_TYPE_VIDEO) { |
| 710 | if (nb_frames < avist->packet_count) |
| 711 | nb_frames = avist->packet_count; |
| 712 | } else { |
| 713 | if (stream->codec_id == AV_CODEC_ID_MP2 || |
| 714 | stream->codec_id == AV_CODEC_ID_MP3) |
| 715 | nb_frames += avist->packet_count; |
| 716 | } |
| 717 | } |
| 718 | avio_wl32(pb, nb_frames); |
| 719 | avio_seek(pb, file_size, SEEK_SET); |
| 720 | |
| 721 | avi_write_counters(s, avi->riff_id); |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | for (i = 0; i < s->nb_streams; i++) { |
| 726 | AVIStream *avist = s->streams[i]->priv_data; |
| 727 | for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++) |
| 728 | av_freep(&avist->indexes.cluster[j]); |
| 729 | av_freep(&avist->indexes.cluster); |
| 730 | avist->indexes.ents_allocated = avist->indexes.entry = 0; |
| 731 | if (pb->seekable) { |
| 732 | avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET); |
| 733 | avio_wl32(pb, avist->max_size); |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | return res; |
| 738 | } |
| 739 | |
| 740 | AVOutputFormat ff_avi_muxer = { |
| 741 | .name = "avi", |
| 742 | .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"), |
| 743 | .mime_type = "video/x-msvideo", |
| 744 | .extensions = "avi", |
| 745 | .priv_data_size = sizeof(AVIContext), |
| 746 | .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3, |
| 747 | .video_codec = AV_CODEC_ID_MPEG4, |
| 748 | .write_header = avi_write_header, |
| 749 | .write_packet = avi_write_packet, |
| 750 | .write_trailer = avi_write_trailer, |
| 751 | .codec_tag = (const AVCodecTag * const []) { |
| 752 | ff_codec_bmp_tags, ff_codec_wav_tags, 0 |
| 753 | }, |
| 754 | }; |