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FFmpeg/libavformat/rmdec.c

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  1. /*

  2.  * "Real" compatible demuxer.

  3.  * Copyright (c) 2000, 2001 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 <inttypes.h>

  23. 

  24. #include "libavutil/avassert.h"

  25. #include "libavutil/avstring.h"

  26. #include "libavutil/channel_layout.h"

  27. #include "libavutil/internal.h"

  28. #include "libavutil/intreadwrite.h"

  29. #include "libavutil/dict.h"

  30. #include "avformat.h"

  31. #include "avio_internal.h"

  32. #include "internal.h"

  33. #include "rmsipr.h"

  34. #include "rm.h"

  35. 

  36. #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/ATRAC

  37. #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed

  38. #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8

  39. #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro

  40. #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC

  41. #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC

  42. 

  43. struct RMStream {

  44.     AVPacket pkt;      ///< place to store merged video frame / reordered audio data

  45.     int videobufsize;  ///< current assembled frame size

  46.     int videobufpos;   ///< position for the next slice in the video buffer

  47.     int curpic_num;    ///< picture number of current frame

  48.     int cur_slice, slices;

  49.     int64_t pktpos;    ///< first slice position in file

  50.     /// Audio descrambling matrix parameters

  51.     int64_t audiotimestamp; ///< Audio packet timestamp

  52.     int sub_packet_cnt; // Subpacket counter, used while reading

  53.     int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container

  54.     int audio_framesize; /// Audio frame size from container

  55.     int sub_packet_lengths[16]; /// Length of each subpacket

  56.     int32_t deint_id;  ///< deinterleaver used in audio stream

  57. };

  58. 

  59. typedef struct {

  60.     int nb_packets;

  61.     int old_format;

  62.     int current_stream;

  63.     int remaining_len;

  64.     int audio_stream_num; ///< Stream number for audio packets

  65.     int audio_pkt_cnt; ///< Output packet counter

  66. } RMDemuxContext;

  67. 

  68. static int rm_read_close(AVFormatContext *s);

  69. 

  70. static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)

  71. {

  72.     int i;

  73.     char *q, r;

  74. 

  75.     q = buf;

  76.     for(i=0;i<len;i++) {

  77.         r = avio_r8(pb);

  78.         if (i < buf_size - 1)

  79.             *q++ = r;

  80.     }

  81.     if (buf_size > 0) *q = '\0';

  82. }

  83. 

  84. static void get_str8(AVIOContext *pb, char *buf, int buf_size)

  85. {

  86.     get_strl(pb, buf, buf_size, avio_r8(pb));

  87. }

  88. 

  89. static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size)

  90. {

  91.     if (size >= 1<<24) {

  92.         av_log(avctx, AV_LOG_ERROR, "extradata size %u too large\n", size);

  93.         return -1;

  94.     }

  95.     if (ff_get_extradata(avctx, pb, size) < 0)

  96.         return AVERROR(ENOMEM);

  97.     return 0;

  98. }

  99. 

  100. static void rm_read_metadata(AVFormatContext *s, AVIOContext *pb, int wide)

  101. {

  102.     char buf[1024];

  103.     int i;

  104. 

  105.     for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {

  106.         int len = wide ? avio_rb16(pb) : avio_r8(pb);

  107.         get_strl(pb, buf, sizeof(buf), len);

  108.         av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);

  109.     }

  110. }

  111. 

  112. RMStream *ff_rm_alloc_rmstream (void)

  113. {

  114.     RMStream *rms = av_mallocz(sizeof(RMStream));

  115.     rms->curpic_num = -1;

  116.     return rms;

  117. }

  118. 

  119. void ff_rm_free_rmstream (RMStream *rms)

  120. {

  121.     av_free_packet(&rms->pkt);

  122. }

  123. 

  124. static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,

  125.                                      AVStream *st, RMStream *ast, int read_all)

  126. {

  127.     char buf[256];

  128.     uint32_t version;

  129.     int ret;

  130. 

  131.     /* ra type header */

  132.     version = avio_rb16(pb); /* version */

  133.     if (version == 3) {

  134.         unsigned bytes_per_minute;

  135.         int header_size = avio_rb16(pb);

  136.         int64_t startpos = avio_tell(pb);

  137.         avio_skip(pb, 8);

  138.         bytes_per_minute = avio_rb16(pb);

  139.         avio_skip(pb, 4);

  140.         rm_read_metadata(s, pb, 0);

  141.         if ((startpos + header_size) >= avio_tell(pb) + 2) {

  142.             // fourcc (should always be "lpcJ")

  143.             avio_r8(pb);

  144.             get_str8(pb, buf, sizeof(buf));

  145.         }

  146.         // Skip extra header crap (this should never happen)

  147.         if ((startpos + header_size) > avio_tell(pb))

  148.             avio_skip(pb, header_size + startpos - avio_tell(pb));

  149.         if (bytes_per_minute)

  150.             st->codec->bit_rate = 8LL * bytes_per_minute / 60;

  151.         st->codec->sample_rate = 8000;

  152.         st->codec->channels = 1;

  153.         st->codec->channel_layout = AV_CH_LAYOUT_MONO;

  154.         st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

  155.         st->codec->codec_id = AV_CODEC_ID_RA_144;

  156.         ast->deint_id = DEINT_ID_INT0;

  157.     } else {

  158.         int flavor, sub_packet_h, coded_framesize, sub_packet_size;

  159.         int codecdata_length;

  160.         unsigned bytes_per_minute;

  161.         /* old version (4) */

  162.         avio_skip(pb, 2); /* unused */

  163.         avio_rb32(pb); /* .ra4 */

  164.         avio_rb32(pb); /* data size */

  165.         avio_rb16(pb); /* version2 */

  166.         avio_rb32(pb); /* header size */

  167.         flavor= avio_rb16(pb); /* add codec info / flavor */

  168.         ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */

  169.         avio_rb32(pb); /* ??? */

  170.         bytes_per_minute = avio_rb32(pb);

  171.         if (version == 4) {

  172.             if (bytes_per_minute)

  173.                 st->codec->bit_rate = 8LL * bytes_per_minute / 60;

  174.         }

  175.         avio_rb32(pb); /* ??? */

  176.         ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */

  177.         st->codec->block_align= avio_rb16(pb); /* frame size */

  178.         ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */

  179.         avio_rb16(pb); /* ??? */

  180.         if (version == 5) {

  181.             avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);

  182.         }

  183.         st->codec->sample_rate = avio_rb16(pb);

  184.         avio_rb32(pb);

  185.         st->codec->channels = avio_rb16(pb);

  186.         if (version == 5) {

  187.             ast->deint_id = avio_rl32(pb);

  188.             avio_read(pb, buf, 4);

  189.             buf[4] = 0;

  190.         } else {

  191.             AV_WL32(buf, 0);

  192.             get_str8(pb, buf, sizeof(buf)); /* desc */

  193.             ast->deint_id = AV_RL32(buf);

  194.             get_str8(pb, buf, sizeof(buf)); /* desc */

  195.         }

  196.         st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

  197.         st->codec->codec_tag  = AV_RL32(buf);

  198.         st->codec->codec_id   = ff_codec_get_id(ff_rm_codec_tags,

  199.                                                 st->codec->codec_tag);

  200. 

  201.         switch (st->codec->codec_id) {

  202.         case AV_CODEC_ID_AC3:

  203.             st->need_parsing = AVSTREAM_PARSE_FULL;

  204.             break;

  205.         case AV_CODEC_ID_RA_288:

  206.             st->codec->extradata_size= 0;

  207.             ast->audio_framesize = st->codec->block_align;

  208.             st->codec->block_align = coded_framesize;

  209.             break;

  210.         case AV_CODEC_ID_COOK:

  211.             st->need_parsing = AVSTREAM_PARSE_HEADERS;

  212.         case AV_CODEC_ID_ATRAC3:

  213.         case AV_CODEC_ID_SIPR:

  214.             if (read_all) {

  215.                 codecdata_length = 0;

  216.             } else {

  217.                 avio_rb16(pb); avio_r8(pb);

  218.                 if (version == 5)

  219.                     avio_r8(pb);

  220.                 codecdata_length = avio_rb32(pb);

  221.                 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){

  222.                     av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");

  223.                     return -1;

  224.                 }

  225.             }

  226. 

  227.             ast->audio_framesize = st->codec->block_align;

  228.             if (st->codec->codec_id == AV_CODEC_ID_SIPR) {

  229.                 if (flavor > 3) {

  230.                     av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",

  231.                            flavor);

  232.                     return -1;

  233.                 }

  234.                 st->codec->block_align = ff_sipr_subpk_size[flavor];

  235.             } else {

  236.                 if(sub_packet_size <= 0){

  237.                     av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");

  238.                     return -1;

  239.                 }

  240.                 st->codec->block_align = ast->sub_packet_size;

  241.             }

  242.             if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)

  243.                 return ret;

  244. 

  245.             break;

  246.         case AV_CODEC_ID_AAC:

  247.             avio_rb16(pb); avio_r8(pb);

  248.             if (version == 5)

  249.                 avio_r8(pb);

  250.             codecdata_length = avio_rb32(pb);

  251.             if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){

  252.                 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");

  253.                 return -1;

  254.             }

  255.             if (codecdata_length >= 1) {

  256.                 avio_r8(pb);

  257.                 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)

  258.                     return ret;

  259.             }

  260.             break;

  261.         }

  262.         switch (ast->deint_id) {

  263.         case DEINT_ID_INT4:

  264.             if (ast->coded_framesize > ast->audio_framesize ||

  265.                 sub_packet_h <= 1 ||

  266.                 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)

  267.                 return AVERROR_INVALIDDATA;

  268.             if (ast->coded_framesize * sub_packet_h != 2*ast->audio_framesize) {

  269.                 avpriv_request_sample(s, "mismatching interleaver parameters");

  270.                 return AVERROR_INVALIDDATA;

  271.             }

  272.             break;

  273.         case DEINT_ID_GENR:

  274.             if (ast->sub_packet_size <= 0 ||

  275.                 ast->sub_packet_size > ast->audio_framesize)

  276.                 return AVERROR_INVALIDDATA;

  277.             if (ast->audio_framesize % ast->sub_packet_size)

  278.                 return AVERROR_INVALIDDATA;

  279.             break;

  280.         case DEINT_ID_SIPR:

  281.         case DEINT_ID_INT0:

  282.         case DEINT_ID_VBRS:

  283.         case DEINT_ID_VBRF:

  284.             break;

  285.         default:

  286.             av_log(s, AV_LOG_ERROR ,"Unknown interleaver %"PRIX32"\n", ast->deint_id);

  287.             return AVERROR_INVALIDDATA;

  288.         }

  289.         if (ast->deint_id == DEINT_ID_INT4 ||

  290.             ast->deint_id == DEINT_ID_GENR ||

  291.             ast->deint_id == DEINT_ID_SIPR) {

  292.             if (st->codec->block_align <= 0 ||

  293.                 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||

  294.                 ast->audio_framesize * sub_packet_h < st->codec->block_align)

  295.                 return AVERROR_INVALIDDATA;

  296.             if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)

  297.                 return AVERROR(ENOMEM);

  298.         }

  299. 

  300.         if (read_all) {

  301.             avio_r8(pb);

  302.             avio_r8(pb);

  303.             avio_r8(pb);

  304.             rm_read_metadata(s, pb, 0);

  305.         }

  306.     }

  307.     return 0;

  308. }

  309. 

  310. int ff_rm_read_mdpr_codecdata(AVFormatContext *s, AVIOContext *pb,

  311.                               AVStream *st, RMStream *rst,

  312.                               unsigned int codec_data_size, const uint8_t *mime)

  313. {

  314.     unsigned int v;

  315.     int size;

  316.     int64_t codec_pos;

  317.     int ret;

  318. 

  319.     if (codec_data_size > INT_MAX)

  320.         return AVERROR_INVALIDDATA;

  321. 

  322.     avpriv_set_pts_info(st, 64, 1, 1000);

  323.     codec_pos = avio_tell(pb);

  324.     v = avio_rb32(pb);

  325. 

  326.     if (v == MKBETAG('M', 'L', 'T', 'I')) {

  327.         int number_of_streams = avio_rb16(pb);

  328.         int number_of_mdpr;

  329.         int i;

  330.         for (i = 0; i<number_of_streams; i++)

  331.             avio_rb16(pb);

  332.         number_of_mdpr = avio_rb16(pb);

  333.         if (number_of_mdpr != 1) {

  334.             avpriv_request_sample(s, "MLTI with multiple MDPR");

  335.         }

  336.         avio_rb32(pb);

  337.         v = avio_rb32(pb);

  338.     }

  339. 

  340.     if (v == MKTAG(0xfd, 'a', 'r', '.')) {

  341.         /* ra type header */

  342.         if (rm_read_audio_stream_info(s, pb, st, rst, 0))

  343.             return -1;

  344.     } else if (v == MKBETAG('L', 'S', 'D', ':')) {

  345.         avio_seek(pb, -4, SEEK_CUR);

  346.         if ((ret = rm_read_extradata(pb, st->codec, codec_data_size)) < 0)

  347.             return ret;

  348. 

  349.         st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

  350.         st->codec->codec_tag  = AV_RL32(st->codec->extradata);

  351.         st->codec->codec_id   = ff_codec_get_id(ff_rm_codec_tags,

  352.                                                 st->codec->codec_tag);

  353.     } else if(mime && !strcmp(mime, "logical-fileinfo")){

  354.         int stream_count, rule_count, property_count, i;

  355.         ff_free_stream(s, st);

  356.         if (avio_rb16(pb) != 0) {

  357.             av_log(s, AV_LOG_WARNING, "Unsupported version\n");

  358.             goto skip;

  359.         }

  360.         stream_count = avio_rb16(pb);

  361.         avio_skip(pb, 6*stream_count);

  362.         rule_count = avio_rb16(pb);

  363.         avio_skip(pb, 2*rule_count);

  364.         property_count = avio_rb16(pb);

  365.         for(i=0; i<property_count; i++){

  366.             uint8_t name[128], val[128];

  367.             avio_rb32(pb);

  368.             if (avio_rb16(pb) != 0) {

  369.                 av_log(s, AV_LOG_WARNING, "Unsupported Name value property version\n");

  370.                 goto skip; //FIXME skip just this one

  371.             }

  372.             get_str8(pb, name, sizeof(name));

  373.             switch(avio_rb32(pb)) {

  374.             case 2: get_strl(pb, val, sizeof(val), avio_rb16(pb));

  375.                 av_dict_set(&s->metadata, name, val, 0);

  376.                 break;

  377.             default: avio_skip(pb, avio_rb16(pb));

  378.             }

  379.         }

  380.     } else {

  381.         int fps;

  382.         if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {

  383.         fail1:

  384.             av_log(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v);

  385.             goto skip;

  386.         }

  387.         st->codec->codec_tag = avio_rl32(pb);

  388.         st->codec->codec_id  = ff_codec_get_id(ff_rm_codec_tags,

  389.                                                st->codec->codec_tag);

  390.         av_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));

  391.         if (st->codec->codec_id == AV_CODEC_ID_NONE)

  392.             goto fail1;

  393.         st->codec->width  = avio_rb16(pb);

  394.         st->codec->height = avio_rb16(pb);

  395.         avio_skip(pb, 2); // looks like bits per sample

  396.         avio_skip(pb, 4); // always zero?

  397.         st->codec->codec_type = AVMEDIA_TYPE_VIDEO;

  398.         st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;

  399.         fps = avio_rb32(pb);

  400. 

  401.         if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)

  402.             return ret;

  403. 

  404.         if (fps > 0) {

  405.             av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,

  406.                       0x10000, fps, (1 << 30) - 1);

  407. #if FF_API_R_FRAME_RATE

  408.             st->r_frame_rate = st->avg_frame_rate;

  409. #endif

  410.         } else if (s->error_recognition & AV_EF_EXPLODE) {

  411.             av_log(s, AV_LOG_ERROR, "Invalid framerate\n");

  412.             return AVERROR_INVALIDDATA;

  413.         }

  414.     }

  415. 

  416. skip:

  417.     /* skip codec info */

  418.     size = avio_tell(pb) - codec_pos;

  419.     if (codec_data_size >= size) {

  420.         avio_skip(pb, codec_data_size - size);

  421.     } else {

  422.         av_log(s, AV_LOG_WARNING, "codec_data_size %u < size %d\n", codec_data_size, size);

  423.     }

  424. 

  425.     return 0;

  426. }

  427. 

  428. /** this function assumes that the demuxer has already seeked to the start

  429.  * of the INDX chunk, and will bail out if not. */

  430. static int rm_read_index(AVFormatContext *s)

  431. {

  432.     AVIOContext *pb = s->pb;

  433.     unsigned int size, n_pkts, str_id, next_off, n, pos, pts;

  434.     AVStream *st;

  435. 

  436.     do {

  437.         if (avio_rl32(pb) != MKTAG('I','N','D','X'))

  438.             return -1;

  439.         size     = avio_rb32(pb);

  440.         if (size < 20)

  441.             return -1;

  442.         avio_skip(pb, 2);

  443.         n_pkts   = avio_rb32(pb);

  444.         str_id   = avio_rb16(pb);

  445.         next_off = avio_rb32(pb);

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

  447.             if (s->streams[n]->id == str_id) {

  448.                 st = s->streams[n];

  449.                 break;

  450.             }

  451.         if (n == s->nb_streams) {

  452.             av_log(s, AV_LOG_ERROR,

  453.                    "Invalid stream index %d for index at pos %"PRId64"\n",

  454.                    str_id, avio_tell(pb));

  455.             goto skip;

  456.         } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {

  457.             av_log(s, AV_LOG_ERROR,

  458.                    "Nr. of packets in packet index for stream index %d "

  459.                    "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",

  460.                    str_id, avio_size(pb), avio_tell(pb),

  461.                    (avio_size(pb) - avio_tell(pb)) / 14);

  462.             goto skip;

  463.         }

  464. 

  465.         for (n = 0; n < n_pkts; n++) {

  466.             avio_skip(pb, 2);

  467.             pts = avio_rb32(pb);

  468.             pos = avio_rb32(pb);

  469.             avio_skip(pb, 4); /* packet no. */

  470. 

  471.             av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);

  472.         }

  473. 

  474. skip:

  475.         if (next_off && avio_tell(pb) < next_off &&

  476.             avio_seek(pb, next_off, SEEK_SET) < 0) {

  477.             av_log(s, AV_LOG_ERROR,

  478.                    "Non-linear index detected, not supported\n");

  479.             return -1;

  480.         }

  481.     } while (next_off);

  482. 

  483.     return 0;

  484. }

  485. 

  486. static int rm_read_header_old(AVFormatContext *s)

  487. {

  488.     RMDemuxContext *rm = s->priv_data;

  489.     AVStream *st;

  490. 

  491.     rm->old_format = 1;

  492.     st = avformat_new_stream(s, NULL);

  493.     if (!st)

  494.         return -1;

  495.     st->priv_data = ff_rm_alloc_rmstream();

  496.     return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);

  497. }

  498. 

  499. static int rm_read_header(AVFormatContext *s)

  500. {

  501.     RMDemuxContext *rm = s->priv_data;

  502.     AVStream *st;

  503.     AVIOContext *pb = s->pb;

  504.     unsigned int tag;

  505.     int tag_size;

  506.     unsigned int start_time, duration;

  507.     unsigned int data_off = 0, indx_off = 0;

  508.     char buf[128], mime[128];

  509.     int flags = 0;

  510.     int ret = -1;

  511. 

  512.     tag = avio_rl32(pb);

  513.     if (tag == MKTAG('.', 'r', 'a', 0xfd)) {

  514.         /* very old .ra format */

  515.         return rm_read_header_old(s);

  516.     } else if (tag != MKTAG('.', 'R', 'M', 'F')) {

  517.         return AVERROR(EIO);

  518.     }

  519. 

  520.     tag_size = avio_rb32(pb);

  521.     avio_skip(pb, tag_size - 8);

  522. 

  523.     for(;;) {

  524.         if (avio_feof(pb))

  525.             goto fail;

  526.         tag = avio_rl32(pb);

  527.         tag_size = avio_rb32(pb);

  528.         avio_rb16(pb);

  529.         av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",

  530.                 (tag      ) & 0xff,

  531.                 (tag >>  8) & 0xff,

  532.                 (tag >> 16) & 0xff,

  533.                 (tag >> 24) & 0xff,

  534.                 tag,

  535.                 tag_size);

  536.         if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))

  537.             goto fail;

  538.         switch(tag) {

  539.         case MKTAG('P', 'R', 'O', 'P'):

  540.             /* file header */

  541.             avio_rb32(pb); /* max bit rate */

  542.             avio_rb32(pb); /* avg bit rate */

  543.             avio_rb32(pb); /* max packet size */

  544.             avio_rb32(pb); /* avg packet size */

  545.             avio_rb32(pb); /* nb packets */

  546.             duration = avio_rb32(pb); /* duration */

  547.             s->duration = av_rescale(duration, AV_TIME_BASE, 1000);

  548.             avio_rb32(pb); /* preroll */

  549.             indx_off = avio_rb32(pb); /* index offset */

  550.             data_off = avio_rb32(pb); /* data offset */

  551.             avio_rb16(pb); /* nb streams */

  552.             flags = avio_rb16(pb); /* flags */

  553.             break;

  554.         case MKTAG('C', 'O', 'N', 'T'):

  555.             rm_read_metadata(s, pb, 1);

  556.             break;

  557.         case MKTAG('M', 'D', 'P', 'R'):

  558.             st = avformat_new_stream(s, NULL);

  559.             if (!st) {

  560.                 ret = AVERROR(ENOMEM);

  561.                 goto fail;

  562.             }

  563.             st->id = avio_rb16(pb);

  564.             avio_rb32(pb); /* max bit rate */

  565.             st->codec->bit_rate = avio_rb32(pb); /* bit rate */

  566.             avio_rb32(pb); /* max packet size */

  567.             avio_rb32(pb); /* avg packet size */

  568.             start_time = avio_rb32(pb); /* start time */

  569.             avio_rb32(pb); /* preroll */

  570.             duration = avio_rb32(pb); /* duration */

  571.             st->start_time = start_time;

  572.             st->duration = duration;

  573.             if(duration>0)

  574.                 s->duration = AV_NOPTS_VALUE;

  575.             get_str8(pb, buf, sizeof(buf)); /* desc */

  576.             get_str8(pb, mime, sizeof(mime)); /* mimetype */

  577.             st->codec->codec_type = AVMEDIA_TYPE_DATA;

  578.             st->priv_data = ff_rm_alloc_rmstream();

  579.             if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,

  580.                                           avio_rb32(pb), mime) < 0)

  581.                 goto fail;

  582.             break;

  583.         case MKTAG('D', 'A', 'T', 'A'):

  584.             goto header_end;

  585.         default:

  586.             /* unknown tag: skip it */

  587.             avio_skip(pb, tag_size - 10);

  588.             break;

  589.         }

  590.     }

  591.  header_end:

  592.     rm->nb_packets = avio_rb32(pb); /* number of packets */

  593.     if (!rm->nb_packets && (flags & 4))

  594.         rm->nb_packets = 3600 * 25;

  595.     avio_rb32(pb); /* next data header */

  596. 

  597.     if (!data_off)

  598.         data_off = avio_tell(pb) - 18;

  599.     if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&

  600.         avio_seek(pb, indx_off, SEEK_SET) >= 0) {

  601.         rm_read_index(s);

  602.         avio_seek(pb, data_off + 18, SEEK_SET);

  603.     }

  604. 

  605.     return 0;

  606. 

  607. fail:

  608.     rm_read_close(s);

  609.     return ret;

  610. }

  611. 

  612. static int get_num(AVIOContext *pb, int *len)

  613. {

  614.     int n, n1;

  615. 

  616.     n = avio_rb16(pb);

  617.     (*len)-=2;

  618.     n &= 0x7FFF;

  619.     if (n >= 0x4000) {

  620.         return n - 0x4000;

  621.     } else {

  622.         n1 = avio_rb16(pb);

  623.         (*len)-=2;

  624.         return (n << 16) | n1;

  625.     }

  626. }

  627. 

  628. /* multiple of 20 bytes for ra144 (ugly) */

  629. #define RAW_PACKET_SIZE 1000

  630. 

  631. static int rm_sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){

  632.     RMDemuxContext *rm = s->priv_data;

  633.     AVIOContext *pb = s->pb;

  634.     AVStream *st;

  635.     uint32_t state=0xFFFFFFFF;

  636. 

  637.     while(!avio_feof(pb)){

  638.         int len, num, i;

  639.         *pos= avio_tell(pb) - 3;

  640.         if(rm->remaining_len > 0){

  641.             num= rm->current_stream;

  642.             len= rm->remaining_len;

  643.             *timestamp = AV_NOPTS_VALUE;

  644.             *flags= 0;

  645.         }else{

  646.             state= (state<<8) + avio_r8(pb);

  647. 

  648.             if(state == MKBETAG('I', 'N', 'D', 'X')){

  649.                 int n_pkts, expected_len;

  650.                 len = avio_rb32(pb);

  651.                 avio_skip(pb, 2);

  652.                 n_pkts = avio_rb32(pb);

  653.                 expected_len = 20 + n_pkts * 14;

  654.                 if (len == 20)

  655.                     /* some files don't add index entries to chunk size... */

  656.                     len = expected_len;

  657.                 else if (len != expected_len)

  658.                     av_log(s, AV_LOG_WARNING,

  659.                            "Index size %d (%d pkts) is wrong, should be %d.\n",

  660.                            len, n_pkts, expected_len);

  661.                 len -= 14; // we already read part of the index header

  662.                 if(len<0)

  663.                     continue;

  664.                 goto skip;

  665.             } else if (state == MKBETAG('D','A','T','A')) {

  666.                 av_log(s, AV_LOG_WARNING,

  667.                        "DATA tag in middle of chunk, file may be broken.\n");

  668.             }

  669. 

  670.             if(state > (unsigned)0xFFFF || state <= 12)

  671.                 continue;

  672.             len=state - 12;

  673.             state= 0xFFFFFFFF;

  674. 

  675.             num = avio_rb16(pb);

  676.             *timestamp = avio_rb32(pb);

  677.             avio_r8(pb); /* reserved */

  678.             *flags = avio_r8(pb); /* flags */

  679.         }

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

  681.             st = s->streams[i];

  682.             if (num == st->id)

  683.                 break;

  684.         }

  685.         if (i == s->nb_streams) {

  686. skip:

  687.             /* skip packet if unknown number */

  688.             avio_skip(pb, len);

  689.             rm->remaining_len = 0;

  690.             continue;

  691.         }

  692.         *stream_index= i;

  693. 

  694.         return len;

  695.     }

  696.     return -1;

  697. }

  698. 

  699. static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,

  700.                                    RMDemuxContext *rm, RMStream *vst,

  701.                                    AVPacket *pkt, int len, int *pseq,

  702.                                    int64_t *timestamp)

  703. {

  704.     int hdr;

  705.     int seq = 0, pic_num = 0, len2 = 0, pos = 0; //init to silcense compiler warning

  706.     int type;

  707.     int ret;

  708. 

  709.     hdr = avio_r8(pb); len--;

  710.     type = hdr >> 6;

  711. 

  712.     if(type != 3){  // not frame as a part of packet

  713.         seq = avio_r8(pb); len--;

  714.     }

  715.     if(type != 1){  // not whole frame

  716.         len2 = get_num(pb, &len);

  717.         pos  = get_num(pb, &len);

  718.         pic_num = avio_r8(pb); len--;

  719.     }

  720.     if(len<0) {

  721.         av_log(s, AV_LOG_ERROR, "Insufficient data\n");

  722.         return -1;

  723.     }

  724.     rm->remaining_len = len;

  725.     if(type&1){     // frame, not slice

  726.         if(type == 3){  // frame as a part of packet

  727.             len= len2;

  728.             *timestamp = pos;

  729.         }

  730.         if(rm->remaining_len < len) {

  731.             av_log(s, AV_LOG_ERROR, "Insufficient remaining len\n");

  732.             return -1;

  733.         }

  734.         rm->remaining_len -= len;

  735.         if(av_new_packet(pkt, len + 9) < 0)

  736.             return AVERROR(EIO);

  737.         pkt->data[0] = 0;

  738.         AV_WL32(pkt->data + 1, 1);

  739.         AV_WL32(pkt->data + 5, 0);

  740.         if ((ret = avio_read(pb, pkt->data + 9, len)) != len) {

  741.             av_free_packet(pkt);

  742.             av_log(s, AV_LOG_ERROR, "Failed to read %d bytes\n", len);

  743.             return ret < 0 ? ret : AVERROR(EIO);

  744.         }

  745.         return 0;

  746.     }

  747.     //now we have to deal with single slice

  748. 

  749.     *pseq = seq;

  750.     if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){

  751.         if (len2 > ffio_limit(pb, len2)) {

  752.             av_log(s, AV_LOG_ERROR, "Impossibly sized packet\n");

  753.             return AVERROR_INVALIDDATA;

  754.         }

  755.         vst->slices = ((hdr & 0x3F) << 1) + 1;

  756.         vst->videobufsize = len2 + 8*vst->slices + 1;

  757.         av_free_packet(&vst->pkt); //FIXME this should be output.

  758.         if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)

  759.             return AVERROR(ENOMEM);

  760.         memset(vst->pkt.data, 0, vst->pkt.size);

  761.         vst->videobufpos = 8*vst->slices + 1;

  762.         vst->cur_slice = 0;

  763.         vst->curpic_num = pic_num;

  764.         vst->pktpos = avio_tell(pb);

  765.     }

  766.     if(type == 2)

  767.         len = FFMIN(len, pos);

  768. 

  769.     if(++vst->cur_slice > vst->slices) {

  770.         av_log(s, AV_LOG_ERROR, "cur slice %d, too large\n", vst->cur_slice);

  771.         return 1;

  772.     }

  773.     if(!vst->pkt.data)

  774.         return AVERROR(ENOMEM);

  775.     AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);

  776.     AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);

  777.     if(vst->videobufpos + len > vst->videobufsize) {

  778.         av_log(s, AV_LOG_ERROR, "outside videobufsize\n");

  779.         return 1;

  780.     }

  781.     if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)

  782.         return AVERROR(EIO);

  783.     vst->videobufpos += len;

  784.     rm->remaining_len-= len;

  785. 

  786.     if (type == 2 || vst->videobufpos == vst->videobufsize) {

  787.         vst->pkt.data[0] = vst->cur_slice-1;

  788.         *pkt= vst->pkt;

  789.         vst->pkt.data= NULL;

  790.         vst->pkt.size= 0;

  791.         vst->pkt.buf = NULL;

  792. #if FF_API_DESTRUCT_PACKET

  793. FF_DISABLE_DEPRECATION_WARNINGS

  794.         vst->pkt.destruct = NULL;

  795. FF_ENABLE_DEPRECATION_WARNINGS

  796. #endif

  797.         if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin

  798.             memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,

  799.                 vst->videobufpos - 1 - 8*vst->slices);

  800.         pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);

  801.         pkt->pts = AV_NOPTS_VALUE;

  802.         pkt->pos = vst->pktpos;

  803.         vst->slices = 0;

  804.         return 0;

  805.     }

  806. 

  807.     return 1;

  808. }

  809. 

  810. static inline void

  811. rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)

  812. {

  813.     uint8_t *ptr;

  814.     int j;

  815. 

  816.     if (st->codec->codec_id == AV_CODEC_ID_AC3) {

  817.         ptr = pkt->data;

  818.         for (j=0;j<pkt->size;j+=2) {

  819.             FFSWAP(int, ptr[0], ptr[1]);

  820.             ptr += 2;

  821.         }

  822.     }

  823. }

  824. 

  825. static int readfull(AVFormatContext *s, AVIOContext *pb, uint8_t *dst, int n) {

  826.     int ret = avio_read(pb, dst, n);

  827.     if (ret != n) {

  828.         if (ret >= 0) memset(dst + ret, 0, n - ret);

  829.         else          memset(dst      , 0, n);

  830.         av_log(s, AV_LOG_ERROR, "Failed to fully read block\n");

  831.     }

  832.     return ret;

  833. }

  834. 

  835. int

  836. ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,

  837.                     AVStream *st, RMStream *ast, int len, AVPacket *pkt,

  838.                     int *seq, int flags, int64_t timestamp)

  839. {

  840.     RMDemuxContext *rm = s->priv_data;

  841.     int ret;

  842. 

  843.     if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  844.         rm->current_stream= st->id;

  845.         ret = rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, &timestamp);

  846.         if(ret)

  847.             return ret < 0 ? ret : -1; //got partial frame or error

  848.     } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  849.         if ((ast->deint_id == DEINT_ID_GENR) ||

  850.             (ast->deint_id == DEINT_ID_INT4) ||

  851.             (ast->deint_id == DEINT_ID_SIPR)) {

  852.             int x;

  853.             int sps = ast->sub_packet_size;

  854.             int cfs = ast->coded_framesize;

  855.             int h = ast->sub_packet_h;

  856.             int y = ast->sub_packet_cnt;

  857.             int w = ast->audio_framesize;

  858. 

  859.             if (flags & 2)

  860.                 y = ast->sub_packet_cnt = 0;

  861.             if (!y)

  862.                 ast->audiotimestamp = timestamp;

  863. 

  864.             switch (ast->deint_id) {

  865.                 case DEINT_ID_INT4:

  866.                     for (x = 0; x < h/2; x++)

  867.                         readfull(s, pb, ast->pkt.data+x*2*w+y*cfs, cfs);

  868.                     break;

  869.                 case DEINT_ID_GENR:

  870.                     for (x = 0; x < w/sps; x++)

  871.                         readfull(s, pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);

  872.                     break;

  873.                 case DEINT_ID_SIPR:

  874.                     readfull(s, pb, ast->pkt.data + y * w, w);

  875.                     break;

  876.             }

  877. 

  878.             if (++(ast->sub_packet_cnt) < h)

  879.                 return -1;

  880.             if (ast->deint_id == DEINT_ID_SIPR)

  881.                 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);

  882. 

  883.              ast->sub_packet_cnt = 0;

  884.              rm->audio_stream_num = st->index;

  885.              rm->audio_pkt_cnt = h * w / st->codec->block_align;

  886.         } else if ((ast->deint_id == DEINT_ID_VBRF) ||

  887.                    (ast->deint_id == DEINT_ID_VBRS)) {

  888.             int x;

  889.             rm->audio_stream_num = st->index;

  890.             ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;

  891.             if (ast->sub_packet_cnt) {

  892.                 for (x = 0; x < ast->sub_packet_cnt; x++)

  893.                     ast->sub_packet_lengths[x] = avio_rb16(pb);

  894.                 rm->audio_pkt_cnt = ast->sub_packet_cnt;

  895.                 ast->audiotimestamp = timestamp;

  896.             } else

  897.                 return -1;

  898.         } else {

  899.             if ((ret = av_get_packet(pb, pkt, len)) < 0)

  900.                 return ret;

  901.             rm_ac3_swap_bytes(st, pkt);

  902.         }

  903.     } else {

  904.         if ((ret = av_get_packet(pb, pkt, len)) < 0)

  905.             return ret;

  906.     }

  907. 

  908.     pkt->stream_index = st->index;

  909. 

  910. #if 0

  911.     if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  912.         if(st->codec->codec_id == AV_CODEC_ID_RV20){

  913.             int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);

  914.             av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);

  915. 

  916.             seq |= (timestamp&~0x3FFF);

  917.             if(seq - timestamp >  0x2000) seq -= 0x4000;

  918.             if(seq - timestamp < -0x2000) seq += 0x4000;

  919.         }

  920.     }

  921. #endif

  922. 

  923.     pkt->pts = timestamp;

  924.     if (flags & 2)

  925.         pkt->flags |= AV_PKT_FLAG_KEY;

  926. 

  927.     return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;

  928. }

  929. 

  930. int

  931. ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,

  932.                       AVStream *st, RMStream *ast, AVPacket *pkt)

  933. {

  934.     RMDemuxContext *rm = s->priv_data;

  935. 

  936.     av_assert0 (rm->audio_pkt_cnt > 0);

  937. 

  938.     if (ast->deint_id == DEINT_ID_VBRF ||

  939.         ast->deint_id == DEINT_ID_VBRS) {

  940.         int ret = av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);

  941.         if (ret < 0)

  942.             return ret;

  943.     } else {

  944.         int ret = av_new_packet(pkt, st->codec->block_align);

  945.         if (ret < 0)

  946.             return ret;

  947.         memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this

  948.                (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),

  949.                st->codec->block_align);

  950.     }

  951.     rm->audio_pkt_cnt--;

  952.     if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {

  953.         ast->audiotimestamp = AV_NOPTS_VALUE;

  954.         pkt->flags = AV_PKT_FLAG_KEY;

  955.     } else

  956.         pkt->flags = 0;

  957.     pkt->stream_index = st->index;

  958. 

  959.     return rm->audio_pkt_cnt;

  960. }

  961. 

  962. static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)

  963. {

  964.     RMDemuxContext *rm = s->priv_data;

  965.     AVStream *st = NULL; // init to silence compiler warning

  966.     int i, len, res, seq = 1;

  967.     int64_t timestamp, pos;

  968.     int flags;

  969. 

  970.     for (;;) {

  971.         if (rm->audio_pkt_cnt) {

  972.             // If there are queued audio packet return them first

  973.             st = s->streams[rm->audio_stream_num];

  974.             res = ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);

  975.             if(res < 0)

  976.                 return res;

  977.             flags = 0;

  978.         } else {

  979.             if (rm->old_format) {

  980.                 RMStream *ast;

  981. 

  982.                 st = s->streams[0];

  983.                 ast = st->priv_data;

  984.                 timestamp = AV_NOPTS_VALUE;

  985.                 len = !ast->audio_framesize ? RAW_PACKET_SIZE :

  986.                     ast->coded_framesize * ast->sub_packet_h / 2;

  987.                 flags = (seq++ == 1) ? 2 : 0;

  988.                 pos = avio_tell(s->pb);

  989.             } else {

  990.                 len = rm_sync(s, &timestamp, &flags, &i, &pos);

  991.                 if (len > 0)

  992.                     st = s->streams[i];

  993.             }

  994. 

  995.             if (len <= 0 || avio_feof(s->pb))

  996.                 return AVERROR(EIO);

  997. 

  998.             res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,

  999.                                       &seq, flags, timestamp);

  1000.             if (res < -1)

  1001.                 return res;

  1002.             if((flags&2) && (seq&0x7F) == 1)

  1003.                 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);

  1004.             if (res)

  1005.                 continue;

  1006.         }

  1007. 

  1008.         if(  (st->discard >= AVDISCARD_NONKEY && !(flags&2))

  1009.            || st->discard >= AVDISCARD_ALL){

  1010.             av_free_packet(pkt);

  1011.         } else

  1012.             break;

  1013.     }

  1014. 

  1015.     return 0;

  1016. }

  1017. 

  1018. static int rm_read_close(AVFormatContext *s)

  1019. {

  1020.     int i;

  1021. 

  1022.     for (i=0;i<s->nb_streams;i++)

  1023.         ff_rm_free_rmstream(s->streams[i]->priv_data);

  1024. 

  1025.     return 0;

  1026. }

  1027. 

  1028. static int rm_probe(AVProbeData *p)

  1029. {

  1030.     /* check file header */

  1031.     if ((p->buf[0] == '.' && p->buf[1] == 'R' &&

  1032.          p->buf[2] == 'M' && p->buf[3] == 'F' &&

  1033.          p->buf[4] == 0 && p->buf[5] == 0) ||

  1034.         (p->buf[0] == '.' && p->buf[1] == 'r' &&

  1035.          p->buf[2] == 'a' && p->buf[3] == 0xfd))

  1036.         return AVPROBE_SCORE_MAX;

  1037.     else

  1038.         return 0;

  1039. }

  1040. 

  1041. static int64_t rm_read_dts(AVFormatContext *s, int stream_index,

  1042.                                int64_t *ppos, int64_t pos_limit)

  1043. {

  1044.     RMDemuxContext *rm = s->priv_data;

  1045.     int64_t pos, dts;

  1046.     int stream_index2, flags, len, h;

  1047. 

  1048.     pos = *ppos;

  1049. 

  1050.     if(rm->old_format)

  1051.         return AV_NOPTS_VALUE;

  1052. 

  1053.     if (avio_seek(s->pb, pos, SEEK_SET) < 0)

  1054.         return AV_NOPTS_VALUE;

  1055. 

  1056.     rm->remaining_len=0;

  1057.     for(;;){

  1058.         int seq=1;

  1059.         AVStream *st;

  1060. 

  1061.         len = rm_sync(s, &dts, &flags, &stream_index2, &pos);

  1062.         if(len<0)

  1063.             return AV_NOPTS_VALUE;

  1064. 

  1065.         st = s->streams[stream_index2];

  1066.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1067.             h= avio_r8(s->pb); len--;

  1068.             if(!(h & 0x40)){

  1069.                 seq = avio_r8(s->pb); len--;

  1070.             }

  1071.         }

  1072. 

  1073.         if((flags&2) && (seq&0x7F) == 1){

  1074.             av_dlog(s, "%d %d-%d %"PRId64" %d\n",

  1075.                     flags, stream_index2, stream_index, dts, seq);

  1076.             av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);

  1077.             if(stream_index2 == stream_index)

  1078.                 break;

  1079.         }

  1080. 

  1081.         avio_skip(s->pb, len);

  1082.     }

  1083.     *ppos = pos;

  1084.     return dts;

  1085. }

  1086. 

  1087. static int rm_read_seek(AVFormatContext *s, int stream_index,

  1088.                         int64_t pts, int flags)

  1089. {

  1090.     RMDemuxContext *rm = s->priv_data;

  1091. 

  1092.     if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)

  1093.         return -1;

  1094.     rm->audio_pkt_cnt = 0;

  1095.     return 0;

  1096. }

  1097. 

  1098. 

  1099. AVInputFormat ff_rm_demuxer = {

  1100.     .name           = "rm",

  1101.     .long_name      = NULL_IF_CONFIG_SMALL("RealMedia"),

  1102.     .priv_data_size = sizeof(RMDemuxContext),

  1103.     .read_probe     = rm_probe,

  1104.     .read_header    = rm_read_header,

  1105.     .read_packet    = rm_read_packet,

  1106.     .read_close     = rm_read_close,

  1107.     .read_timestamp = rm_read_dts,

  1108.     .read_seek      = rm_read_seek,

  1109. };

  1110. 

  1111. AVInputFormat ff_rdt_demuxer = {

  1112.     .name           = "rdt",

  1113.     .long_name      = NULL_IF_CONFIG_SMALL("RDT demuxer"),

  1114.     .priv_data_size = sizeof(RMDemuxContext),

  1115.     .read_close     = rm_read_close,

  1116.     .flags          = AVFMT_NOFILE,

  1117. };