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FFmpeg/libavformat/avienc.c

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  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. #include <math.h>

  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/avutil.h"

  33. #include "libavutil/internal.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. #define AVI_MASTER_INDEX_PREFIX_SIZE    (8+2+1+1+4+8+4+4)

  55. #define AVI_MASTER_INDEX_ENTRY_SIZE     16  /* bytes per entry */

  56. #define AVI_MASTER_INDEX_SIZE_DEFAULT   256 /* number of entries */

  57. 

  58. typedef struct AVIIndex {

  59.     int64_t     indx_start;

  60.     int64_t     audio_strm_offset;

  61.     int         entry;

  62.     int         ents_allocated;

  63.     int         master_odml_riff_id_base;

  64.     AVIIentry** cluster;

  65. } AVIIndex;

  66. 

  67. typedef struct AVIContext {

  68.     const AVClass *class;

  69.     int64_t riff_start, movi_list, odml_list;

  70.     int64_t frames_hdr_all;

  71.     int riff_id;

  72.     int reserve_index_space;

  73.     int master_index_max_size;

  74.     int write_channel_mask;

  75. } AVIContext;

  76. 

  77. typedef struct AVIStream {

  78.     int64_t frames_hdr_strm;

  79.     int64_t audio_strm_length;

  80.     int packet_count;

  81.     int entry;

  82.     int max_size;

  83.     int sample_requested;

  84. 

  85.     int64_t last_dts;

  86. 

  87.     AVIIndex indexes;

  88. 

  89.     int64_t strh_flags_offset;

  90. 

  91.     uint32_t palette[AVPALETTE_COUNT];

  92.     uint32_t old_palette[AVPALETTE_COUNT];

  93.     int64_t pal_offset;

  94. } AVIStream;

  95. 

  96. static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt);

  97. 

  98. static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)

  99. {

  100.     int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;

  101.     int id = ent_id % AVI_INDEX_CLUSTER_SIZE;

  102.     return &idx->cluster[cl][id];

  103. }

  104. 

  105. static int avi_add_ientry(AVFormatContext *s, int stream_index, char *tag,

  106.                           unsigned int flags, unsigned int size)

  107. {

  108.     AVIContext *avi  = s->priv_data;

  109.     AVIOContext *pb  = s->pb;

  110.     AVIStream *avist = s->streams[stream_index]->priv_data;

  111.     AVIIndex *idx    = &avist->indexes;

  112.     int cl           = idx->entry / AVI_INDEX_CLUSTER_SIZE;

  113.     int id           = idx->entry % AVI_INDEX_CLUSTER_SIZE;

  114. 

  115.     if (idx->ents_allocated <= idx->entry) {

  116.         idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);

  117.         if (!idx->cluster) {

  118.             idx->ents_allocated = 0;

  119.             idx->entry          = 0;

  120.             return AVERROR(ENOMEM);

  121.         }

  122.         idx->cluster[cl] =

  123.             av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));

  124.         if (!idx->cluster[cl])

  125.             return AVERROR(ENOMEM);

  126.         idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;

  127.     }

  128. 

  129.     if (tag)

  130.         memcpy(idx->cluster[cl][id].tag, tag, 4);

  131.     else

  132.         memset(idx->cluster[cl][id].tag, 0, 4);

  133.     idx->cluster[cl][id].flags = flags;

  134.     idx->cluster[cl][id].pos   = avio_tell(pb) - avi->movi_list;

  135.     idx->cluster[cl][id].len   = size;

  136.     avist->max_size = FFMAX(avist->max_size, size);

  137.     idx->entry++;

  138. 

  139.     return 0;

  140. }

  141. 

  142. static av_cold int avi_init(struct AVFormatContext *s)

  143. {

  144.     AVIContext *avi = s->priv_data;

  145. 

  146.     if (avi->reserve_index_space > 0) {

  147.         avi->master_index_max_size = (avi->reserve_index_space - AVI_MASTER_INDEX_PREFIX_SIZE) / AVI_MASTER_INDEX_ENTRY_SIZE;

  148.         avi->master_index_max_size = FFMAX(avi->master_index_max_size, 16);

  149.     } else

  150.         avi->master_index_max_size = AVI_MASTER_INDEX_SIZE_DEFAULT;

  151.     av_log(s, AV_LOG_DEBUG, "reserve_index_space:%d master_index_max_size:%d\n",

  152.            avi->reserve_index_space, avi->master_index_max_size);

  153. 

  154.     return 1; /* stream initialization continues in avi_write_header */

  155. }

  156. 

  157. static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,

  158.                                   const char *riff_tag, const char *list_tag)

  159. {

  160.     AVIContext *avi = s->priv_data;

  161.     int64_t loff;

  162.     int i;

  163. 

  164.     avi->riff_id++;

  165.     for (i = 0; i < s->nb_streams; i++) {

  166.         AVIStream *avist = s->streams[i]->priv_data;

  167.         avist->indexes.audio_strm_offset = avist->audio_strm_length;

  168.         avist->indexes.entry = 0;

  169.     }

  170. 

  171.     avi->riff_start = ff_start_tag(pb, "RIFF");

  172.     ffio_wfourcc(pb, riff_tag);

  173.     loff = ff_start_tag(pb, "LIST");

  174.     ffio_wfourcc(pb, list_tag);

  175.     return loff;

  176. }

  177. 

  178. static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)

  179. {

  180.     tag[0] = '0' + index / 10;

  181.     tag[1] = '0' + index % 10;

  182.     if (type == AVMEDIA_TYPE_VIDEO) {

  183.         tag[2] = 'd';

  184.         tag[3] = 'c';

  185.     } else if (type == AVMEDIA_TYPE_SUBTITLE) {

  186.         // note: this is not an official code

  187.         tag[2] = 's';

  188.         tag[3] = 'b';

  189.     } else {

  190.         tag[2] = 'w';

  191.         tag[3] = 'b';

  192.     }

  193.     tag[4] = '\0';

  194.     return tag;

  195. }

  196. 

  197. static int avi_write_counters(AVFormatContext *s, int riff_id)

  198. {

  199.     AVIOContext *pb = s->pb;

  200.     AVIContext *avi = s->priv_data;

  201.     int n, au_byterate, au_ssize, au_scale, nb_frames = 0;

  202.     int64_t file_size;

  203.     AVCodecParameters *par;

  204. 

  205.     file_size = avio_tell(pb);

  206.     for (n = 0; n < s->nb_streams; n++) {

  207.         AVIStream *avist = s->streams[n]->priv_data;

  208. 

  209.         av_assert0(avist->frames_hdr_strm);

  210.         par = s->streams[n]->codecpar;

  211.         avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);

  212.         ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);

  213.         if (au_ssize == 0)

  214.             avio_wl32(pb, avist->packet_count);

  215.         else

  216.             avio_wl32(pb, avist->audio_strm_length / au_ssize);

  217.         if (par->codec_type == AVMEDIA_TYPE_VIDEO)

  218.             nb_frames = FFMAX(nb_frames, avist->packet_count);

  219.     }

  220.     if (riff_id == 1) {

  221.         av_assert0(avi->frames_hdr_all);

  222.         avio_seek(pb, avi->frames_hdr_all, SEEK_SET);

  223.         avio_wl32(pb, nb_frames);

  224.     }

  225.     avio_seek(pb, file_size, SEEK_SET);

  226. 

  227.     return 0;

  228. }

  229. 

  230. static void write_odml_master(AVFormatContext *s, int stream_index)

  231. {

  232.     AVIOContext *pb = s->pb;

  233.     AVIContext *avi = s->priv_data;

  234.     AVStream *st = s->streams[stream_index];

  235.     AVCodecParameters *par = st->codecpar;

  236.     AVIStream *avist = st->priv_data;

  237.     unsigned char tag[5];

  238.     int j;

  239. 

  240.     /* Starting to lay out AVI OpenDML master index.

  241.         * We want to make it JUNK entry for now, since we'd

  242.         * like to get away without making AVI an OpenDML one

  243.         * for compatibility reasons. */

  244.     avist->indexes.indx_start = ff_start_tag(pb, "JUNK");

  245.     avio_wl16(pb, 4);   /* wLongsPerEntry */

  246.     avio_w8(pb, 0);     /* bIndexSubType (0 == frame index) */

  247.     avio_w8(pb, 0);     /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */

  248.     avio_wl32(pb, 0);   /* nEntriesInUse (will fill out later on) */

  249.     ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, par->codec_type));

  250.                         /* dwChunkId */

  251.     avio_wl64(pb, 0);   /* dwReserved[3] */

  252.     avio_wl32(pb, 0);   /* Must be 0.    */

  253.     for (j = 0; j < avi->master_index_max_size * 2; j++)

  254.         avio_wl64(pb, 0);

  255.     ff_end_tag(pb, avist->indexes.indx_start);

  256. }

  257. 

  258. static int avi_write_header(AVFormatContext *s)

  259. {

  260.     AVIContext *avi = s->priv_data;

  261.     AVIOContext *pb = s->pb;

  262.     int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;

  263.     int64_t max_stream_duration = 0;

  264.     AVCodecParameters *video_par;

  265.     AVStream *video_st = NULL;

  266.     int64_t list1, list2, strh, strf;

  267.     AVDictionaryEntry *t = NULL;

  268.     int padding;

  269. 

  270.     if (s->nb_streams > AVI_MAX_STREAM_COUNT) {

  271.         av_log(s, AV_LOG_ERROR, "AVI does not support "

  272.                ">"AV_STRINGIFY(AVI_MAX_STREAM_COUNT)" streams\n");

  273.         return AVERROR(EINVAL);

  274.     }

  275. 

  276.     for (n = 0; n < s->nb_streams; n++) {

  277.         s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));

  278.         if (!s->streams[n]->priv_data)

  279.             return AVERROR(ENOMEM);

  280.     }

  281. 

  282.     /* header list */

  283.     avi->riff_id = 0;

  284.     list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");

  285. 

  286.     /* avi header */

  287.     ffio_wfourcc(pb, "avih");

  288.     avio_wl32(pb, 14 * 4);

  289.     bitrate = 0;

  290. 

  291.     video_par = NULL;

  292.     for (n = 0; n < s->nb_streams; n++) {

  293.         AVCodecParameters *par = s->streams[n]->codecpar;

  294.         AVStream *st = s->streams[n];

  295.         bitrate = FFMIN(bitrate + par->bit_rate, INT32_MAX);

  296.         if (st->duration > 0) {

  297.             int64_t stream_duration = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);

  298.             max_stream_duration = FFMAX(stream_duration, max_stream_duration);

  299.         }

  300.         if (par->codec_type == AVMEDIA_TYPE_VIDEO) {

  301.             video_par = par;

  302.             video_st = st;

  303.         }

  304.     }

  305. 

  306.     /* guess master index size based on bitrate and duration */

  307.     if (!avi->reserve_index_space) {

  308.         double duration_est, filesize_est;

  309.         if (s->duration > 0)

  310.             duration_est = (double)s->duration / AV_TIME_BASE;

  311.         else if (max_stream_duration > 0)

  312.             duration_est = (double)max_stream_duration / AV_TIME_BASE;

  313.         else

  314.             duration_est = 10 * 60 * 60; /* default to 10 hours */

  315.         filesize_est = duration_est * (bitrate / 8) * 1.10; /* add 10% safety margin for muxer+bitrate */

  316.         avi->master_index_max_size = FFMAX((int)ceil(filesize_est / AVI_MAX_RIFF_SIZE) + 1,

  317.                                            avi->master_index_max_size);

  318.         av_log(s, AV_LOG_DEBUG, "duration_est:%0.3f, filesize_est:%0.1fGiB, master_index_max_size:%d\n",

  319.                duration_est, filesize_est / (1024*1024*1024), avi->master_index_max_size);

  320.     }

  321. 

  322.     nb_frames = 0;

  323. 

  324.     // TODO: should be avg_frame_rate

  325.     if (video_st)

  326.         avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /

  327.                                   video_st->time_base.den));

  328.     else

  329.         avio_wl32(pb, 0);

  330.     avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */

  331.     avio_wl32(pb, 0); /* padding */

  332.     if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))

  333.         avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED);  /* flags */

  334.     else

  335.         avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED);  /* flags */

  336.     avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */

  337.     avio_wl32(pb, nb_frames); /* nb frames, filled later */

  338.     avio_wl32(pb, 0); /* initial frame */

  339.     avio_wl32(pb, s->nb_streams); /* nb streams */

  340.     avio_wl32(pb, 1024 * 1024); /* suggested buffer size */

  341.     if (video_par) {

  342.         avio_wl32(pb, video_par->width);

  343.         avio_wl32(pb, video_par->height);

  344.     } else {

  345.         avio_wl32(pb, 0);

  346.         avio_wl32(pb, 0);

  347.     }

  348.     avio_wl32(pb, 0); /* reserved */

  349.     avio_wl32(pb, 0); /* reserved */

  350.     avio_wl32(pb, 0); /* reserved */

  351.     avio_wl32(pb, 0); /* reserved */

  352. 

  353.     /* stream list */

  354.     for (i = 0; i < n; i++) {

  355.         AVStream *st = s->streams[i];

  356.         AVCodecParameters *par = st->codecpar;

  357.         AVIStream *avist = st->priv_data;

  358.         list2 = ff_start_tag(pb, "LIST");

  359.         ffio_wfourcc(pb, "strl");

  360. 

  361.         /* stream generic header */

  362.         strh = ff_start_tag(pb, "strh");

  363.         switch (par->codec_type) {

  364.         case AVMEDIA_TYPE_SUBTITLE:

  365.             // XSUB subtitles behave like video tracks, other subtitles

  366.             // are not (yet) supported.

  367.             if (par->codec_id != AV_CODEC_ID_XSUB) {

  368.                 avpriv_report_missing_feature(s, "Subtitle streams other than DivX XSUB");

  369.                 return AVERROR_PATCHWELCOME;

  370.             }

  371.         case AVMEDIA_TYPE_VIDEO:

  372.             ffio_wfourcc(pb, "vids");

  373.             break;

  374.         case AVMEDIA_TYPE_AUDIO:

  375.             ffio_wfourcc(pb, "auds");

  376.             break;

  377. //      case AVMEDIA_TYPE_TEXT:

  378. //          ffio_wfourcc(pb, "txts");

  379. //          break;

  380.         case AVMEDIA_TYPE_DATA:

  381.             ffio_wfourcc(pb, "dats");

  382.             break;

  383.         }

  384.         if (par->codec_type == AVMEDIA_TYPE_VIDEO ||

  385.             par->codec_id == AV_CODEC_ID_XSUB)

  386.             avio_wl32(pb, par->codec_tag);

  387.         else

  388.             avio_wl32(pb, 1);

  389.         avist->strh_flags_offset = avio_tell(pb);

  390.         avio_wl32(pb, 0); /* flags */

  391.         avio_wl16(pb, 0); /* priority */

  392.         avio_wl16(pb, 0); /* language */

  393.         avio_wl32(pb, 0); /* initial frame */

  394. 

  395.         ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);

  396. 

  397.         if (   par->codec_type == AVMEDIA_TYPE_VIDEO

  398.             && par->codec_id != AV_CODEC_ID_XSUB

  399.             && au_byterate > 1000LL*au_scale) {

  400.             au_byterate = 600;

  401.             au_scale    = 1;

  402.         }

  403.         avpriv_set_pts_info(st, 64, au_scale, au_byterate);

  404.         if (par->codec_id == AV_CODEC_ID_XSUB)

  405.             au_scale = au_byterate = 0;

  406. 

  407.         avio_wl32(pb, au_scale); /* scale */

  408.         avio_wl32(pb, au_byterate); /* rate */

  409. 

  410.         avio_wl32(pb, 0); /* start */

  411.         /* remember this offset to fill later */

  412.         avist->frames_hdr_strm = avio_tell(pb);

  413.         if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))

  414.             /* FIXME: this may be broken, but who cares */

  415.             avio_wl32(pb, AVI_MAX_RIFF_SIZE);

  416.         else

  417.             avio_wl32(pb, 0);  /* length, XXX: filled later */

  418. 

  419.         /* suggested buffer size, is set to largest chunk size in avi_write_trailer */

  420.         if (par->codec_type == AVMEDIA_TYPE_VIDEO)

  421.             avio_wl32(pb, 1024 * 1024);

  422.         else if (par->codec_type == AVMEDIA_TYPE_AUDIO)

  423.             avio_wl32(pb, 12 * 1024);

  424.         else

  425.             avio_wl32(pb, 0);

  426.         avio_wl32(pb, -1); /* quality */

  427.         avio_wl32(pb, au_ssize); /* sample size */

  428.         avio_wl32(pb, 0);

  429.         avio_wl16(pb, par->width);

  430.         avio_wl16(pb, par->height);

  431.         ff_end_tag(pb, strh);

  432. 

  433.         if (par->codec_type != AVMEDIA_TYPE_DATA) {

  434.             int ret, flags;

  435.             enum AVPixelFormat pix_fmt;

  436. 

  437.             strf = ff_start_tag(pb, "strf");

  438.             switch (par->codec_type) {

  439.             case AVMEDIA_TYPE_SUBTITLE:

  440.                 /* XSUB subtitles behave like video tracks, other subtitles

  441.                  * are not (yet) supported. */

  442.                 if (par->codec_id != AV_CODEC_ID_XSUB)

  443.                     break;

  444.             case AVMEDIA_TYPE_VIDEO:

  445.                 /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */

  446.                 if (  !par->codec_tag

  447.                     && par->codec_id == AV_CODEC_ID_RAWVIDEO

  448.                     && par->format == AV_PIX_FMT_RGB555LE

  449.                     && par->bits_per_coded_sample == 15)

  450.                     par->bits_per_coded_sample = 16;

  451.                 avist->pal_offset = avio_tell(pb) + 40;

  452.                 ff_put_bmp_header(pb, par, 0, 0);

  453.                 pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,

  454.                                               par->bits_per_coded_sample);

  455.                 if (   !par->codec_tag

  456.                     && par->codec_id == AV_CODEC_ID_RAWVIDEO

  457.                     && par->format != pix_fmt

  458.                     && par->format != AV_PIX_FMT_NONE)

  459.                     av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",

  460.                           av_get_pix_fmt_name(par->format));

  461. 

  462.                 if (par->format == AV_PIX_FMT_PAL8) {

  463.                     if (par->bits_per_coded_sample < 0 || par->bits_per_coded_sample > 8) {

  464.                         av_log(s, AV_LOG_ERROR, "PAL8 with %d bps is not allowed\n", par->bits_per_coded_sample);

  465.                         return AVERROR(EINVAL);

  466.                     }

  467.                 }

  468. 

  469.                 break;

  470.             case AVMEDIA_TYPE_AUDIO:

  471.                 flags = (avi->write_channel_mask == 0) ? FF_PUT_WAV_HEADER_SKIP_CHANNELMASK : 0;

  472.                 if ((ret = ff_put_wav_header(s, pb, par, flags)) < 0)

  473.                     return ret;

  474.                 break;

  475.             default:

  476.                 av_log(s, AV_LOG_ERROR,

  477.                     "Invalid or not supported codec type '%s' found in the input\n",

  478.                     (char *)av_x_if_null(av_get_media_type_string(par->codec_type), "?"));

  479.                 return AVERROR(EINVAL);

  480.             }

  481.             ff_end_tag(pb, strf);

  482.             if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {

  483.                 ff_riff_write_info_tag(s->pb, "strn", t->value);

  484.                 t = NULL;

  485.             }

  486.             if (par->codec_id == AV_CODEC_ID_XSUB

  487.             && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {

  488.                 const char* langstr = ff_convert_lang_to(t->value, AV_LANG_ISO639_1);

  489.                 t = NULL;

  490.                 if (langstr) {

  491.                     char* str = av_asprintf("Subtitle - %s-xx;02", langstr);

  492.                     if (!str)

  493.                         return AVERROR(ENOMEM);

  494.                     ff_riff_write_info_tag(s->pb, "strn", str);

  495.                     av_free(str);

  496.                 }

  497.             }

  498.         }

  499. 

  500.         if (pb->seekable & AVIO_SEEKABLE_NORMAL) {

  501.             write_odml_master(s, i);

  502.         }

  503. 

  504.         if (par->codec_type == AVMEDIA_TYPE_VIDEO   &&

  505.             st->sample_aspect_ratio.num > 0 &&

  506.             st->sample_aspect_ratio.den > 0) {

  507.             int vprp       = ff_start_tag(pb, "vprp");

  508.             AVRational dar = av_mul_q(st->sample_aspect_ratio,

  509.                                       (AVRational) { par->width,

  510.                                                      par->height });

  511.             int num, den, fields, i;

  512.             av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);

  513.             if (par->field_order == AV_FIELD_TT || par->field_order == AV_FIELD_BB ||

  514.                 par->field_order == AV_FIELD_TB || par->field_order == AV_FIELD_BT) {

  515.                 fields = 2; // interlaced

  516.             } else {

  517.                 fields = 1; // progressive

  518.             }

  519. 

  520.             avio_wl32(pb, 0); // video format   = unknown

  521.             avio_wl32(pb, 0); // video standard = unknown

  522.             // TODO: should be avg_frame_rate

  523.             avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));

  524.             avio_wl32(pb, par->width);

  525.             avio_wl32(pb, par->height);

  526.             avio_wl16(pb, den);

  527.             avio_wl16(pb, num);

  528.             avio_wl32(pb, par->width);

  529.             avio_wl32(pb, par->height);

  530.             avio_wl32(pb, fields); // fields per frame

  531. 

  532.             for (i = 0; i < fields; i++) {

  533.                 int start_line;

  534.                 // OpenDML v1.02 is not very specific on what value to use for

  535.                 // start_line when frame data is not coming from a capturing device,

  536.                 // so just use 0/1 depending on the field order for interlaced frames

  537.                 if (par->field_order == AV_FIELD_TT || par->field_order == AV_FIELD_TB) {

  538.                     start_line = (i == 0) ? 0 : 1;

  539.                 } else if (par->field_order == AV_FIELD_BB || par->field_order == AV_FIELD_BT) {

  540.                     start_line = (i == 0) ? 1 : 0;

  541.                 } else {

  542.                     start_line = 0;

  543.                 }

  544. 

  545.                 avio_wl32(pb, par->height / fields); // compressed bitmap height

  546.                 avio_wl32(pb, par->width);           // compressed bitmap width

  547.                 avio_wl32(pb, par->height / fields); // valid bitmap height

  548.                 avio_wl32(pb, par->width);           // valid bitmap width

  549.                 avio_wl32(pb, 0);                    // valid bitmap X offset

  550.                 avio_wl32(pb, 0);                    // valid bitmap Y offset

  551.                 avio_wl32(pb, 0);                    // valid X offset in T

  552.                 avio_wl32(pb, start_line);           // valid Y start line

  553.             }

  554.             ff_end_tag(pb, vprp);

  555.         }

  556. 

  557.         ff_end_tag(pb, list2);

  558.     }

  559. 

  560.     if (pb->seekable & AVIO_SEEKABLE_NORMAL) {

  561.         /* AVI could become an OpenDML one, if it grows beyond 2Gb range */

  562.         avi->odml_list = ff_start_tag(pb, "JUNK");

  563.         ffio_wfourcc(pb, "odml");

  564.         ffio_wfourcc(pb, "dmlh");

  565.         avio_wl32(pb, 248);

  566.         for (i = 0; i < 248; i += 4)

  567.             avio_wl32(pb, 0);

  568.         ff_end_tag(pb, avi->odml_list);

  569.     }

  570. 

  571.     ff_end_tag(pb, list1);

  572. 

  573.     ff_riff_write_info(s);

  574. 

  575. 

  576.     padding = s->metadata_header_padding;

  577.     if (padding < 0)

  578.         padding = 1016;

  579. 

  580.     /* some padding for easier tag editing */

  581.     if (padding) {

  582.         list2 = ff_start_tag(pb, "JUNK");

  583.         for (i = padding; i > 0; i -= 4)

  584.             avio_wl32(pb, 0);

  585.         ff_end_tag(pb, list2);

  586.     }

  587. 

  588.     avi->movi_list = ff_start_tag(pb, "LIST");

  589.     ffio_wfourcc(pb, "movi");

  590. 

  591.     return 0;

  592. }

  593. 

  594. static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)

  595. {

  596.     AVIOContext *pb = s->pb;

  597.     AVIContext *avi = s->priv_data;

  598.     AVIStream *avist = s->streams[stream_index]->priv_data;

  599.     int64_t pos;

  600.     int au_byterate, au_ssize, au_scale;

  601. 

  602.     pos = avio_tell(pb);

  603. 

  604.     /* Updating one entry in the AVI OpenDML master index */

  605.     avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);

  606.     ffio_wfourcc(pb, "indx");             /* enabling this entry */

  607.     avio_skip(pb, 8);

  608.     avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base);          /* nEntriesInUse */

  609.     avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));

  610.     avio_wl64(pb, ix);                    /* qwOffset */

  611.     avio_wl32(pb, size);                  /* dwSize */

  612.     ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);

  613.     if (s->streams[stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {

  614.         uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);

  615.         if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {

  616.             avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");

  617.             avist->sample_requested = 1;

  618.         }

  619.         avio_wl32(pb, audio_segm_size / au_ssize);  /* dwDuration (sample count) */

  620.     } else

  621.         avio_wl32(pb, avist->indexes.entry);  /* dwDuration (packet count) */

  622. 

  623.     avio_seek(pb, pos, SEEK_SET);

  624. }

  625. 

  626. static int avi_write_ix(AVFormatContext *s)

  627. {

  628.     AVIOContext *pb = s->pb;

  629.     AVIContext *avi = s->priv_data;

  630.     char tag[5];

  631.     char ix_tag[] = "ix00";

  632.     int i, j;

  633. 

  634.     av_assert0(pb->seekable & AVIO_SEEKABLE_NORMAL);

  635. 

  636.     for (i = 0; i < s->nb_streams; i++) {

  637.         AVIStream *avist = s->streams[i]->priv_data;

  638.         if (avi->riff_id - avist->indexes.master_odml_riff_id_base == avi->master_index_max_size) {

  639.             int64_t pos;

  640.             int size = AVI_MASTER_INDEX_PREFIX_SIZE + AVI_MASTER_INDEX_ENTRY_SIZE * avi->master_index_max_size;

  641. 

  642.             pos = avio_tell(pb);

  643.             update_odml_entry(s, i, pos, size);

  644.             write_odml_master(s, i);

  645.             av_assert1(avio_tell(pb) - pos == size);

  646.             avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;

  647.         }

  648.         av_assert0(avi->riff_id - avist->indexes.master_odml_riff_id_base < avi->master_index_max_size);

  649.     }

  650. 

  651.     for (i = 0; i < s->nb_streams; i++) {

  652.         AVIStream *avist = s->streams[i]->priv_data;

  653.         int64_t ix;

  654. 

  655.         avi_stream2fourcc(tag, i, s->streams[i]->codecpar->codec_type);

  656.         ix_tag[3] = '0' + i;

  657. 

  658.         /* Writing AVI OpenDML leaf index chunk */

  659.         ix = avio_tell(pb);

  660.         ffio_wfourcc(pb, ix_tag);      /* ix?? */

  661.         avio_wl32(pb, avist->indexes.entry * 8 + 24);

  662.         /* chunk size */

  663.         avio_wl16(pb, 2);           /* wLongsPerEntry */

  664.         avio_w8(pb, 0);             /* bIndexSubType (0 == frame index) */

  665.         avio_w8(pb, 1);             /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */

  666.         avio_wl32(pb, avist->indexes.entry);

  667.         /* nEntriesInUse */

  668.         ffio_wfourcc(pb, tag);         /* dwChunkId */

  669.         avio_wl64(pb, avi->movi_list); /* qwBaseOffset */

  670.         avio_wl32(pb, 0);              /* dwReserved_3 (must be 0) */

  671. 

  672.         for (j = 0; j < avist->indexes.entry; j++) {

  673.             AVIIentry *ie = avi_get_ientry(&avist->indexes, j);

  674.             avio_wl32(pb, ie->pos + 8);

  675.             avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |

  676.                           (ie->flags & 0x10 ? 0 : 0x80000000));

  677.         }

  678. 

  679.         update_odml_entry(s, i, ix, avio_tell(pb) - ix);

  680.     }

  681.     return 0;

  682. }

  683. 

  684. static int avi_write_idx1(AVFormatContext *s)

  685. {

  686.     AVIOContext *pb = s->pb;

  687.     AVIContext *avi = s->priv_data;

  688.     int64_t idx_chunk;

  689.     int i;

  690.     char tag[5];

  691. 

  692.     if (pb->seekable & AVIO_SEEKABLE_NORMAL) {

  693.         AVIStream *avist;

  694.         AVIIentry *ie = 0, *tie;

  695.         int empty, stream_id = -1;

  696. 

  697.         idx_chunk = ff_start_tag(pb, "idx1");

  698.         for (i = 0; i < s->nb_streams; i++) {

  699.             avist        = s->streams[i]->priv_data;

  700.             avist->entry = 0;

  701.         }

  702. 

  703.         do {

  704.             empty = 1;

  705.             for (i = 0; i < s->nb_streams; i++) {

  706.                 avist = s->streams[i]->priv_data;

  707.                 if (avist->indexes.entry <= avist->entry)

  708.                     continue;

  709. 

  710.                 tie = avi_get_ientry(&avist->indexes, avist->entry);

  711.                 if (empty || tie->pos < ie->pos) {

  712.                     ie        = tie;

  713.                     stream_id = i;

  714.                 }

  715.                 empty = 0;

  716.             }

  717.             if (!empty) {

  718.                 avist = s->streams[stream_id]->priv_data;

  719.                 if (*ie->tag)

  720.                     ffio_wfourcc(pb, ie->tag);

  721.                 else {

  722.                     avi_stream2fourcc(tag, stream_id,

  723.                                   s->streams[stream_id]->codecpar->codec_type);

  724.                     ffio_wfourcc(pb, tag);

  725.                 }

  726.                 avio_wl32(pb, ie->flags);

  727.                 avio_wl32(pb, ie->pos);

  728.                 avio_wl32(pb, ie->len);

  729.                 avist->entry++;

  730.             }

  731.         } while (!empty);

  732.         ff_end_tag(pb, idx_chunk);

  733. 

  734.         avi_write_counters(s, avi->riff_id);

  735.     }

  736.     return 0;

  737. }

  738. 

  739. static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)

  740. {

  741.     AVIStream *avist    = s->streams[stream_index]->priv_data;

  742.     AVCodecParameters *par = s->streams[stream_index]->codecpar;

  743. 

  744.     ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);

  745.     while (par->block_align == 0 && dts != AV_NOPTS_VALUE &&

  746.            dts > avist->packet_count && par->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {

  747.         AVPacket empty_packet;

  748. 

  749.         if (dts - avist->packet_count > 60000) {

  750.             av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);

  751.             return AVERROR(EINVAL);

  752.         }

  753. 

  754.         av_init_packet(&empty_packet);

  755.         empty_packet.size         = 0;

  756.         empty_packet.data         = NULL;

  757.         empty_packet.stream_index = stream_index;

  758.         avi_write_packet_internal(s, &empty_packet);

  759.         ff_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);

  760.     }

  761. 

  762.     return 0;

  763. }

  764. 

  765. static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)

  766. {

  767.     const int stream_index = pkt->stream_index;

  768.     AVCodecParameters *par = s->streams[stream_index]->codecpar;

  769.     int ret;

  770. 

  771.     if (par->codec_id == AV_CODEC_ID_H264 && par->codec_tag == MKTAG('H','2','6','4') && pkt->size) {

  772.         ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);

  773.         if (ret < 0)

  774.             return ret;

  775.     }

  776. 

  777.     if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)

  778.         return ret;

  779. 

  780.     if (!pkt->size)

  781.         return avi_write_packet_internal(s, pkt); /* Passthrough */

  782. 

  783.     if (par->codec_type == AVMEDIA_TYPE_VIDEO) {

  784.         AVIStream *avist = s->streams[stream_index]->priv_data;

  785.         AVIOContext *pb  = s->pb;

  786.         AVPacket *opkt   = pkt;

  787.         int reshuffle_ret;

  788.         if (par->codec_id == AV_CODEC_ID_RAWVIDEO && par->codec_tag == 0) {

  789.             int64_t bpc = par->bits_per_coded_sample != 15 ? par->bits_per_coded_sample : 16;

  790.             int expected_stride = ((par->width * bpc + 31) >> 5)*4;

  791.             reshuffle_ret = ff_reshuffle_raw_rgb(s, &pkt, par, expected_stride);

  792.             if (reshuffle_ret < 0)

  793.                 return reshuffle_ret;

  794.         } else

  795.             reshuffle_ret = 0;

  796.         if (par->format == AV_PIX_FMT_PAL8) {

  797.             ret = ff_get_packet_palette(s, opkt, reshuffle_ret, avist->palette);

  798.             if (ret < 0)

  799.                 goto fail;

  800.             if (ret) {

  801.                 int pal_size = 1 << par->bits_per_coded_sample;

  802.                 int pc_tag, i;

  803. 

  804.                 av_assert0(par->bits_per_coded_sample >= 0 && par->bits_per_coded_sample <= 8);

  805. 

  806.                 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && avist->pal_offset) {

  807.                     int64_t cur_offset = avio_tell(pb);

  808.                     avio_seek(pb, avist->pal_offset, SEEK_SET);

  809.                     for (i = 0; i < pal_size; i++) {

  810.                         uint32_t v = avist->palette[i];

  811.                         avio_wl32(pb, v & 0xffffff);

  812.                     }

  813.                     avio_seek(pb, cur_offset, SEEK_SET);

  814.                     memcpy(avist->old_palette, avist->palette, pal_size * 4);

  815.                     avist->pal_offset = 0;

  816.                 }

  817.                 if (memcmp(avist->palette, avist->old_palette, pal_size * 4)) {

  818.                     unsigned char tag[5];

  819.                     avi_stream2fourcc(tag, stream_index, par->codec_type);

  820.                     tag[2] = 'p'; tag[3] = 'c';

  821.                     if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {

  822.                         if (avist->strh_flags_offset) {

  823.                             int64_t cur_offset = avio_tell(pb);

  824.                             avio_seek(pb, avist->strh_flags_offset, SEEK_SET);

  825.                             avio_wl32(pb, AVISF_VIDEO_PALCHANGES);

  826.                             avio_seek(pb, cur_offset, SEEK_SET);

  827.                             avist->strh_flags_offset = 0;

  828.                         }

  829.                         ret = avi_add_ientry(s, stream_index, tag, AVIIF_NO_TIME,

  830.                                        pal_size * 4 + 4);

  831.                         if (ret < 0)

  832.                             goto fail;

  833.                     }

  834.                     pc_tag = ff_start_tag(pb, tag);

  835.                     avio_w8(pb, 0);

  836.                     avio_w8(pb, pal_size & 0xFF);

  837.                     avio_wl16(pb, 0); // reserved

  838.                     for (i = 0; i < pal_size; i++) {

  839.                         uint32_t v = avist->palette[i];

  840.                         avio_wb32(pb, v<<8);

  841.                     }

  842.                     ff_end_tag(pb, pc_tag);

  843.                     memcpy(avist->old_palette, avist->palette, pal_size * 4);

  844.                 }

  845.             }

  846.         }

  847.         if (reshuffle_ret) {

  848.             ret = avi_write_packet_internal(s, pkt);

  849. 

  850. fail:

  851.             if (reshuffle_ret)

  852.                 av_packet_free(&pkt);

  853.             return ret;

  854.         }

  855.     }

  856. 

  857.     return avi_write_packet_internal(s, pkt);

  858. }

  859. 

  860. static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt)

  861. {

  862.     unsigned char tag[5];

  863.     unsigned int flags = 0;

  864.     const int stream_index = pkt->stream_index;

  865.     int size               = pkt->size;

  866.     AVIContext *avi     = s->priv_data;

  867.     AVIOContext *pb     = s->pb;

  868.     AVIStream *avist    = s->streams[stream_index]->priv_data;

  869.     AVCodecParameters *par = s->streams[stream_index]->codecpar;

  870. 

  871.     if (pkt->dts != AV_NOPTS_VALUE)

  872.         avist->last_dts = pkt->dts + pkt->duration;

  873. 

  874.     avist->packet_count++;

  875. 

  876.     // Make sure to put an OpenDML chunk when the file size exceeds the limits

  877.     if ((pb->seekable & AVIO_SEEKABLE_NORMAL) &&

  878.         (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {

  879.         avi_write_ix(s);

  880.         ff_end_tag(pb, avi->movi_list);

  881. 

  882.         if (avi->riff_id == 1)

  883.             avi_write_idx1(s);

  884. 

  885.         ff_end_tag(pb, avi->riff_start);

  886.         avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");

  887.     }

  888. 

  889.     avi_stream2fourcc(tag, stream_index, par->codec_type);

  890.     if (pkt->flags & AV_PKT_FLAG_KEY)

  891.         flags = 0x10;

  892.     if (par->codec_type == AVMEDIA_TYPE_AUDIO)

  893.         avist->audio_strm_length += size;

  894. 

  895.     if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {

  896.         int ret;

  897.         ret = avi_add_ientry(s, stream_index, NULL, flags, size);

  898.         if (ret < 0)

  899.             return ret;

  900.     }

  901. 

  902.     avio_write(pb, tag, 4);

  903.     avio_wl32(pb, size);

  904.     avio_write(pb, pkt->data, size);

  905.     if (size & 1)

  906.         avio_w8(pb, 0);

  907. 

  908.     return 0;

  909. }

  910. 

  911. static int avi_write_trailer(AVFormatContext *s)

  912. {

  913.     AVIContext *avi = s->priv_data;

  914.     AVIOContext *pb = s->pb;

  915.     int res = 0;

  916.     int i, n, nb_frames;

  917.     int64_t file_size;

  918. 

  919.     for (i = 0; i < s->nb_streams; i++) {

  920.         AVIStream *avist = s->streams[i]->priv_data;

  921.         write_skip_frames(s, i, avist->last_dts);

  922.     }

  923. 

  924.     if (pb->seekable & AVIO_SEEKABLE_NORMAL) {

  925.         if (avi->riff_id == 1) {

  926.             ff_end_tag(pb, avi->movi_list);

  927.             res = avi_write_idx1(s);

  928.             ff_end_tag(pb, avi->riff_start);

  929.         } else {

  930.             avi_write_ix(s);

  931.             ff_end_tag(pb, avi->movi_list);

  932.             ff_end_tag(pb, avi->riff_start);

  933. 

  934.             file_size = avio_tell(pb);

  935.             avio_seek(pb, avi->odml_list - 8, SEEK_SET);

  936.             ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */

  937.             avio_skip(pb, 16);

  938. 

  939.             for (n = nb_frames = 0; n < s->nb_streams; n++) {

  940.                 AVCodecParameters *par = s->streams[n]->codecpar;

  941.                 AVIStream *avist       = s->streams[n]->priv_data;

  942. 

  943.                 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {

  944.                     if (nb_frames < avist->packet_count)

  945.                         nb_frames = avist->packet_count;

  946.                 } else {

  947.                     if (par->codec_id == AV_CODEC_ID_MP2 ||

  948.                         par->codec_id == AV_CODEC_ID_MP3)

  949.                         nb_frames += avist->packet_count;

  950.                 }

  951.             }

  952.             avio_wl32(pb, nb_frames);

  953.             avio_seek(pb, file_size, SEEK_SET);

  954. 

  955.             avi_write_counters(s, avi->riff_id);

  956.         }

  957.     }

  958. 

  959.     if (avi->riff_id >= avi->master_index_max_size) {

  960.         int index_space = AVI_MASTER_INDEX_PREFIX_SIZE +

  961.                           AVI_MASTER_INDEX_ENTRY_SIZE * avi->riff_id;

  962.         av_log(s, AV_LOG_WARNING, "Output file not strictly OpenDML compliant, "

  963.                "consider re-muxing with 'reserve_index_space' option value >= %d\n",

  964.                index_space);

  965.     }

  966. 

  967.     for (i = 0; i < s->nb_streams; i++) {

  968.         AVIStream *avist = s->streams[i]->priv_data;

  969.         if (pb->seekable & AVIO_SEEKABLE_NORMAL) {

  970.             avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);

  971.             avio_wl32(pb, avist->max_size);

  972.         }

  973.     }

  974. 

  975.     return res;

  976. }

  977. 

  978. static void avi_deinit(AVFormatContext *s)

  979. {

  980.     for (int i = 0; i < s->nb_streams; i++) {

  981.         AVIStream *avist = s->streams[i]->priv_data;

  982.         if (!avist)

  983.             continue;

  984.         for (int j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)

  985.             av_freep(&avist->indexes.cluster[j]);

  986.         av_freep(&avist->indexes.cluster);

  987.         avist->indexes.ents_allocated = avist->indexes.entry = 0;

  988.     }

  989. }

  990. 

  991. #define OFFSET(x) offsetof(AVIContext, x)

  992. #define ENC AV_OPT_FLAG_ENCODING_PARAM

  993. static const AVOption options[] = {

  994.     { "reserve_index_space", "reserve space (in bytes) at the beginning of the file for each stream index", OFFSET(reserve_index_space), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, ENC },

  995.     { "write_channel_mask", "write channel mask into wave format header", OFFSET(write_channel_mask), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },

  996.     { NULL },

  997. };

  998. 

  999. static const AVClass avi_muxer_class = {

  1000.     .class_name = "AVI muxer",

  1001.     .item_name  = av_default_item_name,

  1002.     .option     = options,

  1003.     .version    = LIBAVUTIL_VERSION_INT,

  1004. };

  1005. 

  1006. AVOutputFormat ff_avi_muxer = {

  1007.     .name           = "avi",

  1008.     .long_name      = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),

  1009.     .mime_type      = "video/x-msvideo",

  1010.     .extensions     = "avi",

  1011.     .priv_data_size = sizeof(AVIContext),

  1012.     .audio_codec    = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,

  1013.     .video_codec    = AV_CODEC_ID_MPEG4,

  1014.     .init           = avi_init,

  1015.     .deinit         = avi_deinit,

  1016.     .write_header   = avi_write_header,

  1017.     .write_packet   = avi_write_packet,

  1018.     .write_trailer  = avi_write_trailer,

  1019.     .codec_tag      = (const AVCodecTag * const []) {

  1020.         ff_codec_bmp_tags, ff_codec_wav_tags, 0

  1021.     },

  1022.     .priv_class     = &avi_muxer_class,

  1023. };