libavformat/avienc.c

   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/internal.h"
  33 #include "libavutil/intreadwrite.h"
  34 #include "libavutil/dict.h"
  35 #include "libavutil/avassert.h"
  36 #include "libavutil/timestamp.h"
  37 #include "libavutil/opt.h"
  38 #include "libavutil/pixdesc.h"
  39 #include "libavcodec/raw.h"
  40
  41 /*
  42  * TODO:
  43  *  - fill all fields if non streamed (nb_frames for example)
  44  */
  45
  46 typedef struct AVIIentry {
  47     char tag[4];
  48     unsigned int flags;
  49     unsigned int pos;
  50     unsigned int len;
  51 } AVIIentry;
  52
  53 #define AVI_INDEX_CLUSTER_SIZE 16384
  54
  55 typedef struct AVIIndex {
  56     int64_t     indx_start;
  57     int64_t     audio_strm_offset;
  58     int         entry;
  59     int         ents_allocated;
  60     int         master_odml_riff_id_base;
  61     AVIIentry** cluster;
  62 } AVIIndex;
  63
  64 typedef struct AVIContext {
  65     const AVClass *class;
  66     int64_t riff_start, movi_list, odml_list;
  67     int64_t frames_hdr_all;
  68     int riff_id;
  69     int write_channel_mask;
  70 } AVIContext;
  71
  72 typedef struct AVIStream {
  73     int64_t frames_hdr_strm;
  74     int64_t audio_strm_length;
  75     int packet_count;
  76     int entry;
  77     int max_size;
  78     int sample_requested;
  79
  80     int64_t last_dts;
  81
  82     AVIIndex indexes;
  83
  84     int64_t strh_flags_offset;
  85
  86     uint32_t palette[AVPALETTE_COUNT];
  87     uint32_t old_palette[AVPALETTE_COUNT];
  88     int64_t pal_offset;
  89 } AVIStream;
  90
  91 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt);
  92
  93 static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
  94 {
  95     int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
  96     int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
  97     return &idx->cluster[cl][id];
  98 }
  99
 100 static int avi_add_ientry(AVFormatContext *s, int stream_index, char *tag,
 101                           unsigned int flags, unsigned int size)
 102 {
 103     AVIContext *avi  = s->priv_data;
 104     AVIOContext *pb  = s->pb;
 105     AVIStream *avist = s->streams[stream_index]->priv_data;
 106     AVIIndex *idx    = &avist->indexes;
 107     int cl           = idx->entry / AVI_INDEX_CLUSTER_SIZE;
 108     int id           = idx->entry % AVI_INDEX_CLUSTER_SIZE;
 109
 110     if (idx->ents_allocated <= idx->entry) {
 111         idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
 112         if (!idx->cluster) {
 113             idx->ents_allocated = 0;
 114             idx->entry          = 0;
 115             return AVERROR(ENOMEM);
 116         }
 117         idx->cluster[cl] =
 118             av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
 119         if (!idx->cluster[cl])
 120             return AVERROR(ENOMEM);
 121         idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
 122     }
 123
 124     if (tag)
 125         memcpy(idx->cluster[cl][id].tag, tag, 4);
 126     else
 127         memset(idx->cluster[cl][id].tag, 0, 4);
 128     idx->cluster[cl][id].flags = flags;
 129     idx->cluster[cl][id].pos   = avio_tell(pb) - avi->movi_list;
 130     idx->cluster[cl][id].len   = size;
 131     avist->max_size = FFMAX(avist->max_size, size);
 132     idx->entry++;
 133
 134     return 0;
 135 }
 136
 137 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
 138                                   const char *riff_tag, const char *list_tag)
 139 {
 140     AVIContext *avi = s->priv_data;
 141     int64_t loff;
 142     int i;
 143
 144     avi->riff_id++;
 145     for (i = 0; i < s->nb_streams; i++) {
 146         AVIStream *avist = s->streams[i]->priv_data;
 147         avist->indexes.audio_strm_offset = avist->audio_strm_length;
 148         avist->indexes.entry = 0;
 149     }
 150
 151     avi->riff_start = ff_start_tag(pb, "RIFF");
 152     ffio_wfourcc(pb, riff_tag);
 153     loff = ff_start_tag(pb, "LIST");
 154     ffio_wfourcc(pb, list_tag);
 155     return loff;
 156 }
 157
 158 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
 159 {
 160     tag[0] = '0' + index / 10;
 161     tag[1] = '0' + index % 10;
 162     if (type == AVMEDIA_TYPE_VIDEO) {
 163         tag[2] = 'd';
 164         tag[3] = 'c';
 165     } else if (type == AVMEDIA_TYPE_SUBTITLE) {
 166         // note: this is not an official code
 167         tag[2] = 's';
 168         tag[3] = 'b';
 169     } else {
 170         tag[2] = 'w';
 171         tag[3] = 'b';
 172     }
 173     tag[4] = '\0';
 174     return tag;
 175 }
 176
 177 static int avi_write_counters(AVFormatContext *s, int riff_id)
 178 {
 179     AVIOContext *pb = s->pb;
 180     AVIContext *avi = s->priv_data;
 181     int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
 182     int64_t file_size;
 183     AVCodecParameters *par;
 184
 185     file_size = avio_tell(pb);
 186     for (n = 0; n < s->nb_streams; n++) {
 187         AVIStream *avist = s->streams[n]->priv_data;
 188
 189         av_assert0(avist->frames_hdr_strm);
 190         par = s->streams[n]->codecpar;
 191         avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
 192         ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
 193         if (au_ssize == 0)
 194             avio_wl32(pb, avist->packet_count);
 195         else
 196             avio_wl32(pb, avist->audio_strm_length / au_ssize);
 197         if (par->codec_type == AVMEDIA_TYPE_VIDEO)
 198             nb_frames = FFMAX(nb_frames, avist->packet_count);
 199     }
 200     if (riff_id == 1) {
 201         av_assert0(avi->frames_hdr_all);
 202         avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
 203         avio_wl32(pb, nb_frames);
 204     }
 205     avio_seek(pb, file_size, SEEK_SET);
 206
 207     return 0;
 208 }
 209
 210 static void write_odml_master(AVFormatContext *s, int stream_index)
 211 {
 212     AVIOContext *pb = s->pb;
 213     AVStream *st = s->streams[stream_index];
 214     AVCodecParameters *par = st->codecpar;
 215     AVIStream *avist = st->priv_data;
 216     unsigned char tag[5];
 217     int j;
 218
 219     /* Starting to lay out AVI OpenDML master index.
 220         * We want to make it JUNK entry for now, since we'd
 221         * like to get away without making AVI an OpenDML one
 222         * for compatibility reasons. */
 223     avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
 224     avio_wl16(pb, 4);   /* wLongsPerEntry */
 225     avio_w8(pb, 0);     /* bIndexSubType (0 == frame index) */
 226     avio_w8(pb, 0);     /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
 227     avio_wl32(pb, 0);   /* nEntriesInUse (will fill out later on) */
 228     ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, par->codec_type));
 229                         /* dwChunkId */
 230     avio_wl64(pb, 0);   /* dwReserved[3] */
 231     avio_wl32(pb, 0);   /* Must be 0.    */
 232     for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
 233         avio_wl64(pb, 0);
 234     ff_end_tag(pb, avist->indexes.indx_start);
 235 }
 236
 237 static int avi_write_header(AVFormatContext *s)
 238 {
 239     AVIContext *avi = s->priv_data;
 240     AVIOContext *pb = s->pb;
 241     int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
 242     AVCodecParameters *video_par;
 243     AVStream *video_st = NULL;
 244     int64_t list1, list2, strh, strf;
 245     AVDictionaryEntry *t = NULL;
 246     int padding;
 247
 248     if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
 249         av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
 250                AVI_MAX_STREAM_COUNT);
 251         return AVERROR(EINVAL);
 252     }
 253
 254     for (n = 0; n < s->nb_streams; n++) {
 255         s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
 256         if (!s->streams[n]->priv_data)
 257             return AVERROR(ENOMEM);
 258     }
 259
 260     /* header list */
 261     avi->riff_id = 0;
 262     list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
 263
 264     /* avi header */
 265     ffio_wfourcc(pb, "avih");
 266     avio_wl32(pb, 14 * 4);
 267     bitrate = 0;
 268
 269     video_par = NULL;
 270     for (n = 0; n < s->nb_streams; n++) {
 271         AVCodecParameters *par = s->streams[n]->codecpar;
 272         bitrate += par->bit_rate;
 273         if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
 274             video_par = par;
 275             video_st = s->streams[n];
 276         }
 277     }
 278
 279     nb_frames = 0;
 280
 281     // TODO: should be avg_frame_rate
 282     if (video_st)
 283         avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
 284                                   video_st->time_base.den));
 285     else
 286         avio_wl32(pb, 0);
 287     avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
 288     avio_wl32(pb, 0); /* padding */
 289     if (!pb->seekable)
 290         avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED);  /* flags */
 291     else
 292         avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED);  /* flags */
 293     avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
 294     avio_wl32(pb, nb_frames); /* nb frames, filled later */
 295     avio_wl32(pb, 0); /* initial frame */
 296     avio_wl32(pb, s->nb_streams); /* nb streams */
 297     avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
 298     if (video_par) {
 299         avio_wl32(pb, video_par->width);
 300         avio_wl32(pb, video_par->height);
 301     } else {
 302         avio_wl32(pb, 0);
 303         avio_wl32(pb, 0);
 304     }
 305     avio_wl32(pb, 0); /* reserved */
 306     avio_wl32(pb, 0); /* reserved */
 307     avio_wl32(pb, 0); /* reserved */
 308     avio_wl32(pb, 0); /* reserved */
 309
 310     /* stream list */
 311     for (i = 0; i < n; i++) {
 312         AVStream *st = s->streams[i];
 313         AVCodecParameters *par = st->codecpar;
 314         AVIStream *avist = st->priv_data;
 315         list2 = ff_start_tag(pb, "LIST");
 316         ffio_wfourcc(pb, "strl");
 317
 318         /* stream generic header */
 319         strh = ff_start_tag(pb, "strh");
 320         switch (par->codec_type) {
 321         case AVMEDIA_TYPE_SUBTITLE:
 322             // XSUB subtitles behave like video tracks, other subtitles
 323             // are not (yet) supported.
 324             if (par->codec_id != AV_CODEC_ID_XSUB) {
 325                 av_log(s, AV_LOG_ERROR,
 326                        "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
 327                 return AVERROR_PATCHWELCOME;
 328             }
 329         case AVMEDIA_TYPE_VIDEO:
 330             ffio_wfourcc(pb, "vids");
 331             break;
 332         case AVMEDIA_TYPE_AUDIO:
 333             ffio_wfourcc(pb, "auds");
 334             break;
 335 //      case AVMEDIA_TYPE_TEXT:
 336 //          ffio_wfourcc(pb, "txts");
 337 //          break;
 338         case AVMEDIA_TYPE_DATA:
 339             ffio_wfourcc(pb, "dats");
 340             break;
 341         }
 342         if (par->codec_type == AVMEDIA_TYPE_VIDEO ||
 343             par->codec_id == AV_CODEC_ID_XSUB)
 344             avio_wl32(pb, par->codec_tag);
 345         else
 346             avio_wl32(pb, 1);
 347         avist->strh_flags_offset = avio_tell(pb);
 348         avio_wl32(pb, 0); /* flags */
 349         avio_wl16(pb, 0); /* priority */
 350         avio_wl16(pb, 0); /* language */
 351         avio_wl32(pb, 0); /* initial frame */
 352
 353         ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
 354
 355         if (   par->codec_type == AVMEDIA_TYPE_VIDEO
 356             && par->codec_id != AV_CODEC_ID_XSUB
 357             && au_byterate > 1000LL*au_scale) {
 358             au_byterate = 600;
 359             au_scale    = 1;
 360         }
 361         avpriv_set_pts_info(st, 64, au_scale, au_byterate);
 362         if (par->codec_id == AV_CODEC_ID_XSUB)
 363             au_scale = au_byterate = 0;
 364
 365         avio_wl32(pb, au_scale); /* scale */
 366         avio_wl32(pb, au_byterate); /* rate */
 367
 368         avio_wl32(pb, 0); /* start */
 369         /* remember this offset to fill later */
 370         avist->frames_hdr_strm = avio_tell(pb);
 371         if (!pb->seekable)
 372             /* FIXME: this may be broken, but who cares */
 373             avio_wl32(pb, AVI_MAX_RIFF_SIZE);
 374         else
 375             avio_wl32(pb, 0);  /* length, XXX: filled later */
 376
 377         /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
 378         if (par->codec_type == AVMEDIA_TYPE_VIDEO)
 379             avio_wl32(pb, 1024 * 1024);
 380         else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
 381             avio_wl32(pb, 12 * 1024);
 382         else
 383             avio_wl32(pb, 0);
 384         avio_wl32(pb, -1); /* quality */
 385         avio_wl32(pb, au_ssize); /* sample size */
 386         avio_wl32(pb, 0);
 387         avio_wl16(pb, par->width);
 388         avio_wl16(pb, par->height);
 389         ff_end_tag(pb, strh);
 390
 391         if (par->codec_type != AVMEDIA_TYPE_DATA) {
 392             int ret, flags;
 393             enum AVPixelFormat pix_fmt;
 394
 395             strf = ff_start_tag(pb, "strf");
 396             switch (par->codec_type) {
 397             case AVMEDIA_TYPE_SUBTITLE:
 398                 /* XSUB subtitles behave like video tracks, other subtitles
 399                  * are not (yet) supported. */
 400                 if (par->codec_id != AV_CODEC_ID_XSUB)
 401                     break;
 402             case AVMEDIA_TYPE_VIDEO:
 403                 /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
 404                 if (  !par->codec_tag
 405                     && par->codec_id == AV_CODEC_ID_RAWVIDEO
 406                     && par->format == AV_PIX_FMT_RGB555LE
 407                     && par->bits_per_coded_sample == 15)
 408                     par->bits_per_coded_sample = 16;
 409                 avist->pal_offset = avio_tell(pb) + 40;
 410                 ff_put_bmp_header(pb, par, ff_codec_bmp_tags, 0, 0);
 411                 pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
 412                                               par->bits_per_coded_sample);
 413                 if (   !par->codec_tag
 414                     && par->codec_id == AV_CODEC_ID_RAWVIDEO
 415                     && par->format != pix_fmt
 416                     && par->format != AV_PIX_FMT_NONE)
 417                     av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
 418                           av_get_pix_fmt_name(par->format));
 419
 420                 if (par->format == AV_PIX_FMT_PAL8) {
 421                     if (par->bits_per_coded_sample < 0 || par->bits_per_coded_sample > 8) {
 422                         av_log(s, AV_LOG_ERROR, "PAL8 with %d bps is not allowed\n", par->bits_per_coded_sample);
 423                         return AVERROR(EINVAL);
 424                     }
 425                 }
 426
 427                 break;
 428             case AVMEDIA_TYPE_AUDIO:
 429                 flags = (avi->write_channel_mask == 0) ? FF_PUT_WAV_HEADER_SKIP_CHANNELMASK : 0;
 430                 if ((ret = ff_put_wav_header(s, pb, par, flags)) < 0)
 431                     return ret;
 432                 break;
 433             default:
 434                 av_log(s, AV_LOG_ERROR,
 435                     "Invalid or not supported codec type '%s' found in the input\n",
 436                     (char *)av_x_if_null(av_get_media_type_string(par->codec_type), "?"));
 437                 return AVERROR(EINVAL);
 438             }
 439             ff_end_tag(pb, strf);
 440             if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
 441                 ff_riff_write_info_tag(s->pb, "strn", t->value);
 442                 t = NULL;
 443             }
 444             if (par->codec_id == AV_CODEC_ID_XSUB
 445             && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
 446                 const char* langstr = ff_convert_lang_to(t->value, AV_LANG_ISO639_1);
 447                 t = NULL;
 448                 if (langstr) {
 449                     char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
 450                     if (!str)
 451                         return AVERROR(ENOMEM);
 452                     ff_riff_write_info_tag(s->pb, "strn", str);
 453                     av_free(str);
 454                 }
 455             }
 456         }
 457
 458         if (pb->seekable) {
 459             write_odml_master(s, i);
 460         }
 461
 462         if (par->codec_type == AVMEDIA_TYPE_VIDEO   &&
 463             st->sample_aspect_ratio.num > 0 &&
 464             st->sample_aspect_ratio.den > 0) {
 465             int vprp       = ff_start_tag(pb, "vprp");
 466             AVRational dar = av_mul_q(st->sample_aspect_ratio,
 467                                       (AVRational) { par->width,
 468                                                      par->height });
 469             int num, den;
 470             av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
 471
 472             avio_wl32(pb, 0); // video format   = unknown
 473             avio_wl32(pb, 0); // video standard = unknown
 474             // TODO: should be avg_frame_rate
 475             avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));
 476             avio_wl32(pb, par->width);
 477             avio_wl32(pb, par->height);
 478             avio_wl16(pb, den);
 479             avio_wl16(pb, num);
 480             avio_wl32(pb, par->width);
 481             avio_wl32(pb, par->height);
 482             avio_wl32(pb, 1); // progressive FIXME
 483
 484             avio_wl32(pb, par->height);
 485             avio_wl32(pb, par->width);
 486             avio_wl32(pb, par->height);
 487             avio_wl32(pb, par->width);
 488             avio_wl32(pb, 0);
 489             avio_wl32(pb, 0);
 490
 491             avio_wl32(pb, 0);
 492             avio_wl32(pb, 0);
 493             ff_end_tag(pb, vprp);
 494         }
 495
 496         ff_end_tag(pb, list2);
 497     }
 498
 499     if (pb->seekable) {
 500         /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
 501         avi->odml_list = ff_start_tag(pb, "JUNK");
 502         ffio_wfourcc(pb, "odml");
 503         ffio_wfourcc(pb, "dmlh");
 504         avio_wl32(pb, 248);
 505         for (i = 0; i < 248; i += 4)
 506             avio_wl32(pb, 0);
 507         ff_end_tag(pb, avi->odml_list);
 508     }
 509
 510     ff_end_tag(pb, list1);
 511
 512     ff_riff_write_info(s);
 513
 514
 515     padding = s->metadata_header_padding;
 516     if (padding < 0)
 517         padding = 1016;
 518
 519     /* some padding for easier tag editing */
 520     if (padding) {
 521         list2 = ff_start_tag(pb, "JUNK");
 522         for (i = padding; i > 0; i -= 4)
 523             avio_wl32(pb, 0);
 524         ff_end_tag(pb, list2);
 525     }
 526
 527     avi->movi_list = ff_start_tag(pb, "LIST");
 528     ffio_wfourcc(pb, "movi");
 529
 530     avio_flush(pb);
 531
 532     return 0;
 533 }
 534
 535 static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
 536 {
 537     AVIOContext *pb = s->pb;
 538     AVIContext *avi = s->priv_data;
 539     AVIStream *avist = s->streams[stream_index]->priv_data;
 540     int64_t pos;
 541     int au_byterate, au_ssize, au_scale;
 542
 543     avio_flush(pb);
 544     pos = avio_tell(pb);
 545
 546     /* Updating one entry in the AVI OpenDML master index */
 547     avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
 548     ffio_wfourcc(pb, "indx");             /* enabling this entry */
 549     avio_skip(pb, 8);
 550     avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base);          /* nEntriesInUse */
 551     avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
 552     avio_wl64(pb, ix);                    /* qwOffset */
 553     avio_wl32(pb, size);                  /* dwSize */
 554     ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
 555     if (s->streams[stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
 556         uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
 557         if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
 558             avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
 559             avist->sample_requested = 1;
 560         }
 561         avio_wl32(pb, audio_segm_size / au_ssize);  /* dwDuration (sample count) */
 562     } else
 563         avio_wl32(pb, avist->indexes.entry);  /* dwDuration (packet count) */
 564
 565     avio_seek(pb, pos, SEEK_SET);
 566 }
 567
 568 static int avi_write_ix(AVFormatContext *s)
 569 {
 570     AVIOContext *pb = s->pb;
 571     AVIContext *avi = s->priv_data;
 572     char tag[5];
 573     char ix_tag[] = "ix00";
 574     int i, j;
 575
 576     av_assert0(pb->seekable);
 577
 578     for (i = 0; i < s->nb_streams; i++) {
 579         AVIStream *avist = s->streams[i]->priv_data;
 580         if (avi->riff_id - avist->indexes.master_odml_riff_id_base == AVI_MASTER_INDEX_SIZE) {
 581             int64_t pos;
 582             int size = 8+2+1+1+4+8+4+4+16*AVI_MASTER_INDEX_SIZE;
 583
 584             pos = avio_tell(pb);
 585             update_odml_entry(s, i, pos, size);
 586             write_odml_master(s, i);
 587             av_assert1(avio_tell(pb) - pos == size);
 588             avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
 589         }
 590         av_assert0(avi->riff_id - avist->indexes.master_odml_riff_id_base < AVI_MASTER_INDEX_SIZE);
 591     }
 592
 593     for (i = 0; i < s->nb_streams; i++) {
 594         AVIStream *avist = s->streams[i]->priv_data;
 595         int64_t ix;
 596
 597         avi_stream2fourcc(tag, i, s->streams[i]->codecpar->codec_type);
 598         ix_tag[3] = '0' + i;
 599
 600         /* Writing AVI OpenDML leaf index chunk */
 601         ix = avio_tell(pb);
 602         ffio_wfourcc(pb, ix_tag);      /* ix?? */
 603         avio_wl32(pb, avist->indexes.entry * 8 + 24);
 604         /* chunk size */
 605         avio_wl16(pb, 2);           /* wLongsPerEntry */
 606         avio_w8(pb, 0);             /* bIndexSubType (0 == frame index) */
 607         avio_w8(pb, 1);             /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
 608         avio_wl32(pb, avist->indexes.entry);
 609         /* nEntriesInUse */
 610         ffio_wfourcc(pb, tag);         /* dwChunkId */
 611         avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
 612         avio_wl32(pb, 0);              /* dwReserved_3 (must be 0) */
 613
 614         for (j = 0; j < avist->indexes.entry; j++) {
 615             AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
 616             avio_wl32(pb, ie->pos + 8);
 617             avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
 618                           (ie->flags & 0x10 ? 0 : 0x80000000));
 619         }
 620
 621         update_odml_entry(s, i, ix, avio_tell(pb) - ix);
 622     }
 623     return 0;
 624 }
 625
 626 static int avi_write_idx1(AVFormatContext *s)
 627 {
 628     AVIOContext *pb = s->pb;
 629     AVIContext *avi = s->priv_data;
 630     int64_t idx_chunk;
 631     int i;
 632     char tag[5];
 633
 634     if (pb->seekable) {
 635         AVIStream *avist;
 636         AVIIentry *ie = 0, *tie;
 637         int empty, stream_id = -1;
 638
 639         idx_chunk = ff_start_tag(pb, "idx1");
 640         for (i = 0; i < s->nb_streams; i++) {
 641             avist        = s->streams[i]->priv_data;
 642             avist->entry = 0;
 643         }
 644
 645         do {
 646             empty = 1;
 647             for (i = 0; i < s->nb_streams; i++) {
 648                 avist = s->streams[i]->priv_data;
 649                 if (avist->indexes.entry <= avist->entry)
 650                     continue;
 651
 652                 tie = avi_get_ientry(&avist->indexes, avist->entry);
 653                 if (empty || tie->pos < ie->pos) {
 654                     ie        = tie;
 655                     stream_id = i;
 656                 }
 657                 empty = 0;
 658             }
 659             if (!empty) {
 660                 avist = s->streams[stream_id]->priv_data;
 661                 if (*ie->tag)
 662                     ffio_wfourcc(pb, ie->tag);
 663                 else {
 664                     avi_stream2fourcc(tag, stream_id,
 665                                   s->streams[stream_id]->codecpar->codec_type);
 666                     ffio_wfourcc(pb, tag);
 667                 }
 668                 avio_wl32(pb, ie->flags);
 669                 avio_wl32(pb, ie->pos);
 670                 avio_wl32(pb, ie->len);
 671                 avist->entry++;
 672             }
 673         } while (!empty);
 674         ff_end_tag(pb, idx_chunk);
 675
 676         avi_write_counters(s, avi->riff_id);
 677     }
 678     return 0;
 679 }
 680
 681 static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
 682 {
 683     AVIStream *avist    = s->streams[stream_index]->priv_data;
 684     AVCodecParameters *par = s->streams[stream_index]->codecpar;
 685
 686     ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
 687     while (par->block_align == 0 && dts != AV_NOPTS_VALUE &&
 688            dts > avist->packet_count && par->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
 689         AVPacket empty_packet;
 690
 691         if (dts - avist->packet_count > 60000) {
 692             av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
 693             return AVERROR(EINVAL);
 694         }
 695
 696         av_init_packet(&empty_packet);
 697         empty_packet.size         = 0;
 698         empty_packet.data         = NULL;
 699         empty_packet.stream_index = stream_index;
 700         avi_write_packet_internal(s, &empty_packet);
 701         ff_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
 702     }
 703
 704     return 0;
 705 }
 706
 707 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
 708 {
 709     const int stream_index = pkt->stream_index;
 710     AVCodecParameters *par = s->streams[stream_index]->codecpar;
 711     int ret;
 712
 713     if (par->codec_id == AV_CODEC_ID_H264 && par->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
 714         ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
 715         if (ret < 0)
 716             return ret;
 717     }
 718
 719     if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
 720         return ret;
 721
 722     if (!pkt->size)
 723         return avi_write_packet_internal(s, pkt); /* Passthrough */
 724
 725     if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
 726         AVIStream *avist = s->streams[stream_index]->priv_data;
 727         AVIOContext *pb  = s->pb;
 728         AVPacket *opkt   = pkt;
 729         int reshuffle_ret;
 730         if (par->codec_id == AV_CODEC_ID_RAWVIDEO && par->codec_tag == 0) {
 731             int64_t bpc = par->bits_per_coded_sample != 15 ? par->bits_per_coded_sample : 16;
 732             int expected_stride = ((par->width * bpc + 31) >> 5)*4;
 733             reshuffle_ret = ff_reshuffle_raw_rgb(s, &pkt, par, expected_stride);
 734             if (reshuffle_ret < 0)
 735                 return reshuffle_ret;
 736         } else
 737             reshuffle_ret = 0;
 738         if (par->format == AV_PIX_FMT_PAL8) {
 739             ret = ff_get_packet_palette(s, opkt, reshuffle_ret, avist->palette);
 740             if (ret < 0)
 741                 goto fail;
 742             if (ret) {
 743                 int pal_size = 1 << par->bits_per_coded_sample;
 744                 int pc_tag, i;
 745
 746                 av_assert0(par->bits_per_coded_sample >= 0 && par->bits_per_coded_sample <= 8);
 747
 748                 if (pb->seekable && avist->pal_offset) {
 749                     int64_t cur_offset = avio_tell(pb);
 750                     avio_seek(pb, avist->pal_offset, SEEK_SET);
 751                     for (i = 0; i < pal_size; i++) {
 752                         uint32_t v = avist->palette[i];
 753                         avio_wl32(pb, v & 0xffffff);
 754                     }
 755                     avio_seek(pb, cur_offset, SEEK_SET);
 756                     memcpy(avist->old_palette, avist->palette, pal_size * 4);
 757                     avist->pal_offset = 0;
 758                 }
 759                 if (memcmp(avist->palette, avist->old_palette, pal_size * 4)) {
 760                     unsigned char tag[5];
 761                     avi_stream2fourcc(tag, stream_index, par->codec_type);
 762                     tag[2] = 'p'; tag[3] = 'c';
 763                     if (s->pb->seekable) {
 764                         if (avist->strh_flags_offset) {
 765                             int64_t cur_offset = avio_tell(pb);
 766                             avio_seek(pb, avist->strh_flags_offset, SEEK_SET);
 767                             avio_wl32(pb, AVISF_VIDEO_PALCHANGES);
 768                             avio_seek(pb, cur_offset, SEEK_SET);
 769                             avist->strh_flags_offset = 0;
 770                         }
 771                         ret = avi_add_ientry(s, stream_index, tag, AVIIF_NO_TIME,
 772                                        pal_size * 4 + 4);
 773                         if (ret < 0)
 774                             goto fail;
 775                     }
 776                     pc_tag = ff_start_tag(pb, tag);
 777                     avio_w8(pb, 0);
 778                     avio_w8(pb, pal_size & 0xFF);
 779                     avio_wl16(pb, 0); // reserved
 780                     for (i = 0; i < pal_size; i++) {
 781                         uint32_t v = avist->palette[i];
 782                         avio_wb32(pb, v<<8);
 783                     }
 784                     ff_end_tag(pb, pc_tag);
 785                     memcpy(avist->old_palette, avist->palette, pal_size * 4);
 786                 }
 787             }
 788         }
 789         if (reshuffle_ret) {
 790             ret = avi_write_packet_internal(s, pkt);
 791
 792 fail:
 793             if (reshuffle_ret)
 794                 av_packet_free(&pkt);
 795             return ret;
 796         }
 797     }
 798
 799     return avi_write_packet_internal(s, pkt);
 800 }
 801
 802 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
 803 {
 804     unsigned char tag[5];
 805     unsigned int flags = 0;
 806     const int stream_index = pkt->stream_index;
 807     int size               = pkt->size;
 808     AVIContext *avi     = s->priv_data;
 809     AVIOContext *pb     = s->pb;
 810     AVIStream *avist    = s->streams[stream_index]->priv_data;
 811     AVCodecParameters *par = s->streams[stream_index]->codecpar;
 812
 813     if (pkt->dts != AV_NOPTS_VALUE)
 814         avist->last_dts = pkt->dts + pkt->duration;
 815
 816     avist->packet_count++;
 817
 818     // Make sure to put an OpenDML chunk when the file size exceeds the limits
 819     if (pb->seekable &&
 820         (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
 821         avi_write_ix(s);
 822         ff_end_tag(pb, avi->movi_list);
 823
 824         if (avi->riff_id == 1)
 825             avi_write_idx1(s);
 826
 827         ff_end_tag(pb, avi->riff_start);
 828         avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
 829     }
 830
 831     avi_stream2fourcc(tag, stream_index, par->codec_type);
 832     if (pkt->flags & AV_PKT_FLAG_KEY)
 833         flags = 0x10;
 834     if (par->codec_type == AVMEDIA_TYPE_AUDIO)
 835         avist->audio_strm_length += size;
 836
 837     if (s->pb->seekable) {
 838         int ret;
 839         ret = avi_add_ientry(s, stream_index, NULL, flags, size);
 840         if (ret < 0)
 841             return ret;
 842     }
 843
 844     avio_write(pb, tag, 4);
 845     avio_wl32(pb, size);
 846     avio_write(pb, pkt->data, size);
 847     if (size & 1)
 848         avio_w8(pb, 0);
 849
 850     return 0;
 851 }
 852
 853 static int avi_write_trailer(AVFormatContext *s)
 854 {
 855     AVIContext *avi = s->priv_data;
 856     AVIOContext *pb = s->pb;
 857     int res = 0;
 858     int i, j, n, nb_frames;
 859     int64_t file_size;
 860
 861     for (i = 0; i < s->nb_streams; i++) {
 862         AVIStream *avist = s->streams[i]->priv_data;
 863         write_skip_frames(s, i, avist->last_dts);
 864     }
 865
 866     if (pb->seekable) {
 867         if (avi->riff_id == 1) {
 868             ff_end_tag(pb, avi->movi_list);
 869             res = avi_write_idx1(s);
 870             ff_end_tag(pb, avi->riff_start);
 871         } else {
 872             avi_write_ix(s);
 873             ff_end_tag(pb, avi->movi_list);
 874             ff_end_tag(pb, avi->riff_start);
 875
 876             file_size = avio_tell(pb);
 877             avio_seek(pb, avi->odml_list - 8, SEEK_SET);
 878             ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
 879             avio_skip(pb, 16);
 880
 881             for (n = nb_frames = 0; n < s->nb_streams; n++) {
 882                 AVCodecParameters *par = s->streams[n]->codecpar;
 883                 AVIStream *avist       = s->streams[n]->priv_data;
 884
 885                 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
 886                     if (nb_frames < avist->packet_count)
 887                         nb_frames = avist->packet_count;
 888                 } else {
 889                     if (par->codec_id == AV_CODEC_ID_MP2 ||
 890                         par->codec_id == AV_CODEC_ID_MP3)
 891                         nb_frames += avist->packet_count;
 892                 }
 893             }
 894             avio_wl32(pb, nb_frames);
 895             avio_seek(pb, file_size, SEEK_SET);
 896
 897             avi_write_counters(s, avi->riff_id);
 898         }
 899     }
 900
 901     for (i = 0; i < s->nb_streams; i++) {
 902         AVIStream *avist = s->streams[i]->priv_data;
 903         for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
 904             av_freep(&avist->indexes.cluster[j]);
 905         av_freep(&avist->indexes.cluster);
 906         avist->indexes.ents_allocated = avist->indexes.entry = 0;
 907         if (pb->seekable) {
 908             avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
 909             avio_wl32(pb, avist->max_size);
 910         }
 911     }
 912
 913     return res;
 914 }
 915
 916 #define OFFSET(x) offsetof(AVIContext, x)
 917 #define ENC AV_OPT_FLAG_ENCODING_PARAM
 918 static const AVOption options[] = {
 919     { "write_channel_mask", "write channel mask into wave format header", OFFSET(write_channel_mask), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
 920     { NULL },
 921 };
 922
 923 static const AVClass avi_muxer_class = {
 924     .class_name = "AVI muxer",
 925     .item_name  = av_default_item_name,
 926     .option     = options,
 927     .version    = LIBAVUTIL_VERSION_INT,
 928 };
 929
 930 AVOutputFormat ff_avi_muxer = {
 931     .name           = "avi",
 932     .long_name      = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
 933     .mime_type      = "video/x-msvideo",
 934     .extensions     = "avi",
 935     .priv_data_size = sizeof(AVIContext),
 936     .audio_codec    = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
 937     .video_codec    = AV_CODEC_ID_MPEG4,
 938     .write_header   = avi_write_header,
 939     .write_packet   = avi_write_packet,
 940     .write_trailer  = avi_write_trailer,
 941     .codec_tag      = (const AVCodecTag * const []) {
 942         ff_codec_bmp_tags, ff_codec_wav_tags, 0
 943     },
 944     .priv_class     = &avi_muxer_class,
 945 };