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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 "libavutil/avstring.h"

  23. #include "libavutil/intreadwrite.h"

  24. #include "avformat.h"

  25. #include "rm.h"

  26. 

  27. struct RMStream {

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

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

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

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

  32.     int cur_slice, slices;

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

  34.     /// Audio descrambling matrix parameters

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

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

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

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

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

  40. };

  41. 

  42. typedef struct {

  43.     int nb_packets;

  44.     int old_format;

  45.     int current_stream;

  46.     int remaining_len;

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

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

  49. } RMDemuxContext;

  50. 

  51. static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)

  52. {

  53.     int i;

  54.     char *q, r;

  55. 

  56.     q = buf;

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

  58.         r = get_byte(pb);

  59.         if (i < buf_size - 1)

  60.             *q++ = r;

  61.     }

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

  63. }

  64. 

  65. static void get_str16(ByteIOContext *pb, char *buf, int buf_size)

  66. {

  67.     get_strl(pb, buf, buf_size, get_be16(pb));

  68. }

  69. 

  70. static void get_str8(ByteIOContext *pb, char *buf, int buf_size)

  71. {

  72.     get_strl(pb, buf, buf_size, get_byte(pb));

  73. }

  74. 

  75. RMStream *ff_rm_alloc_rmstream (void)

  76. {

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

  78.     rms->curpic_num = -1;

  79.     return rms;

  80. }

  81. 

  82. void ff_rm_free_rmstream (RMStream *rms)

  83. {

  84.     av_free_packet(&rms->pkt);

  85. }

  86. 

  87. static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,

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

  89. {

  90.     char buf[256];

  91.     uint32_t version;

  92. 

  93.     /* ra type header */

  94.     version = get_be32(pb); /* version */

  95.     if (((version >> 16) & 0xff) == 3) {

  96.         int64_t startpos = url_ftell(pb);

  97.         url_fskip(pb, 14);

  98.         get_str8(pb, s->title, sizeof(s->title));

  99.         get_str8(pb, s->author, sizeof(s->author));

  100.         get_str8(pb, s->copyright, sizeof(s->copyright));

  101.         get_str8(pb, s->comment, sizeof(s->comment));

  102.         if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {

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

  104.             get_byte(pb);

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

  106.         }

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

  108.         if ((startpos + (version & 0xffff)) > url_ftell(pb))

  109.             url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));

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

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

  112.         st->codec->codec_type = CODEC_TYPE_AUDIO;

  113.         st->codec->codec_id = CODEC_ID_RA_144;

  114.     } else {

  115.         int flavor, sub_packet_h, coded_framesize, sub_packet_size;

  116.         /* old version (4) */

  117.         get_be32(pb); /* .ra4 */

  118.         get_be32(pb); /* data size */

  119.         get_be16(pb); /* version2 */

  120.         get_be32(pb); /* header size */

  121.         flavor= get_be16(pb); /* add codec info / flavor */

  122.         ast->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */

  123.         get_be32(pb); /* ??? */

  124.         get_be32(pb); /* ??? */

  125.         get_be32(pb); /* ??? */

  126.         ast->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */

  127.         st->codec->block_align= get_be16(pb); /* frame size */

  128.         ast->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */

  129.         get_be16(pb); /* ??? */

  130.         if (((version >> 16) & 0xff) == 5) {

  131.             get_be16(pb); get_be16(pb); get_be16(pb);

  132.         }

  133.         st->codec->sample_rate = get_be16(pb);

  134.         get_be32(pb);

  135.         st->codec->channels = get_be16(pb);

  136.         if (((version >> 16) & 0xff) == 5) {

  137.             get_be32(pb);

  138.             get_buffer(pb, buf, 4);

  139.             buf[4] = 0;

  140.         } else {

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

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

  143.         }

  144.         st->codec->codec_type = CODEC_TYPE_AUDIO;

  145.         if (!strcmp(buf, "dnet")) {

  146.             st->codec->codec_id = CODEC_ID_AC3;

  147.             st->need_parsing = AVSTREAM_PARSE_FULL;

  148.         } else if (!strcmp(buf, "28_8")) {

  149.             st->codec->codec_id = CODEC_ID_RA_288;

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

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

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

  153. 

  154.             if(ast->audio_framesize >= UINT_MAX / sub_packet_h){

  155.                 av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");

  156.                 return -1;

  157.             }

  158. 

  159.             av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);

  160.         } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc")) || (!strcmp(buf, "sipr"))) {

  161.             int codecdata_length;

  162.             get_be16(pb); get_byte(pb);

  163.             if (((version >> 16) & 0xff) == 5)

  164.                 get_byte(pb);

  165.             codecdata_length = get_be32(pb);

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

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

  168.                 return -1;

  169.             }

  170. 

  171.             if(sub_packet_size <= 0){

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

  173.                 return -1;

  174.             }

  175. 

  176.             if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;

  177.             else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR;

  178.             else st->codec->codec_id = CODEC_ID_ATRAC3;

  179.             st->codec->extradata_size= codecdata_length;

  180.             st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  181.             get_buffer(pb, st->codec->extradata, st->codec->extradata_size);

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

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

  184. 

  185.             if(ast->audio_framesize >= UINT_MAX / sub_packet_h){

  186.                 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");

  187.                 return -1;

  188.             }

  189. 

  190.             av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);

  191.         } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {

  192.             int codecdata_length;

  193.             get_be16(pb); get_byte(pb);

  194.             if (((version >> 16) & 0xff) == 5)

  195.                 get_byte(pb);

  196.             st->codec->codec_id = CODEC_ID_AAC;

  197.             codecdata_length = get_be32(pb);

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

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

  200.                 return -1;

  201.             }

  202.             if (codecdata_length >= 1) {

  203.                 st->codec->extradata_size = codecdata_length - 1;

  204.                 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  205.                 get_byte(pb);

  206.                 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);

  207.             }

  208.         } else {

  209.             st->codec->codec_id = CODEC_ID_NONE;

  210.             av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));

  211.         }

  212.         if (read_all) {

  213.             get_byte(pb);

  214.             get_byte(pb);

  215.             get_byte(pb);

  216. 

  217.             get_str8(pb, s->title, sizeof(s->title));

  218.             get_str8(pb, s->author, sizeof(s->author));

  219.             get_str8(pb, s->copyright, sizeof(s->copyright));

  220.             get_str8(pb, s->comment, sizeof(s->comment));

  221.         }

  222.     }

  223.     return 0;

  224. }

  225. 

  226. int

  227. ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,

  228.                            AVStream *st, RMStream *rst, int codec_data_size)

  229. {

  230.     unsigned int v;

  231.     int size;

  232.     int64_t codec_pos;

  233. 

  234.     av_set_pts_info(st, 64, 1, 1000);

  235.     codec_pos = url_ftell(pb);

  236.     v = get_be32(pb);

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

  238.         /* ra type header */

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

  240.             return -1;

  241.     } else {

  242.         int fps, fps2;

  243.         if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {

  244.         fail1:

  245.             av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");

  246.             goto skip;

  247.         }

  248.         st->codec->codec_tag = get_le32(pb);

  249. //        av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));

  250.         if (   st->codec->codec_tag != MKTAG('R', 'V', '1', '0')

  251.             && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')

  252.             && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')

  253.             && st->codec->codec_tag != MKTAG('R', 'V', '4', '0')

  254.             && st->codec->codec_tag != MKTAG('R', 'V', 'T', 'R'))

  255.             goto fail1;

  256.         st->codec->width = get_be16(pb);

  257.         st->codec->height = get_be16(pb);

  258.         st->codec->time_base.num= 1;

  259.         fps= get_be16(pb);

  260.         st->codec->codec_type = CODEC_TYPE_VIDEO;

  261.         get_be32(pb);

  262.         fps2= get_be16(pb);

  263.         get_be16(pb);

  264. 

  265.         st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);

  266. 

  267.         if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){

  268.             //check is redundant as get_buffer() will catch this

  269.             av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");

  270.             return -1;

  271.         }

  272.         st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  273.         if (!st->codec->extradata)

  274.             return AVERROR(ENOMEM);

  275.         get_buffer(pb, st->codec->extradata, st->codec->extradata_size);

  276. 

  277. //        av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);

  278.         st->codec->time_base.den = fps * st->codec->time_base.num;

  279.         switch(((uint8_t*)st->codec->extradata)[4]>>4){

  280.         case 1: st->codec->codec_id = CODEC_ID_RV10; break;

  281.         case 2: st->codec->codec_id = CODEC_ID_RV20; break;

  282.         case 3: st->codec->codec_id = CODEC_ID_RV30; break;

  283.         case 4: st->codec->codec_id = CODEC_ID_RV40; break;

  284.         default: goto fail1;

  285.         }

  286.     }

  287. 

  288. skip:

  289.     /* skip codec info */

  290.     size = url_ftell(pb) - codec_pos;

  291.     url_fskip(pb, codec_data_size - size);

  292. 

  293.     return 0;

  294. }

  295. 

  296. 

  297. static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)

  298. {

  299.     RMDemuxContext *rm = s->priv_data;

  300.     AVStream *st;

  301. 

  302.     rm->old_format = 1;

  303.     st = av_new_stream(s, 0);

  304.     if (!st)

  305.         return -1;

  306.     st->priv_data = ff_rm_alloc_rmstream();

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

  308. }

  309. 

  310. static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)

  311. {

  312.     RMDemuxContext *rm = s->priv_data;

  313.     AVStream *st;

  314.     ByteIOContext *pb = s->pb;

  315.     unsigned int tag;

  316.     int tag_size;

  317.     unsigned int start_time, duration;

  318.     char buf[128];

  319.     int flags = 0;

  320. 

  321.     tag = get_le32(pb);

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

  323.         /* very old .ra format */

  324.         return rm_read_header_old(s, ap);

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

  326.         return AVERROR(EIO);

  327.     }

  328. 

  329.     get_be32(pb); /* header size */

  330.     get_be16(pb);

  331.     get_be32(pb);

  332.     get_be32(pb); /* number of headers */

  333. 

  334.     for(;;) {

  335.         if (url_feof(pb))

  336.             return -1;

  337.         tag = get_le32(pb);

  338.         tag_size = get_be32(pb);

  339.         get_be16(pb);

  340. #if 0

  341.         printf("tag=%c%c%c%c (%08x) size=%d\n",

  342.                (tag) & 0xff,

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

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

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

  346.                tag,

  347.                tag_size);

  348. #endif

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

  350.             return -1;

  351.         switch(tag) {

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

  353.             /* file header */

  354.             get_be32(pb); /* max bit rate */

  355.             get_be32(pb); /* avg bit rate */

  356.             get_be32(pb); /* max packet size */

  357.             get_be32(pb); /* avg packet size */

  358.             get_be32(pb); /* nb packets */

  359.             get_be32(pb); /* duration */

  360.             get_be32(pb); /* preroll */

  361.             get_be32(pb); /* index offset */

  362.             get_be32(pb); /* data offset */

  363.             get_be16(pb); /* nb streams */

  364.             flags = get_be16(pb); /* flags */

  365.             break;

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

  367.             get_str16(pb, s->title, sizeof(s->title));

  368.             get_str16(pb, s->author, sizeof(s->author));

  369.             get_str16(pb, s->copyright, sizeof(s->copyright));

  370.             get_str16(pb, s->comment, sizeof(s->comment));

  371.             break;

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

  373.             st = av_new_stream(s, 0);

  374.             if (!st)

  375.                 return AVERROR(ENOMEM);

  376.             st->id = get_be16(pb);

  377.             get_be32(pb); /* max bit rate */

  378.             st->codec->bit_rate = get_be32(pb); /* bit rate */

  379.             get_be32(pb); /* max packet size */

  380.             get_be32(pb); /* avg packet size */

  381.             start_time = get_be32(pb); /* start time */

  382.             get_be32(pb); /* preroll */

  383.             duration = get_be32(pb); /* duration */

  384.             st->start_time = start_time;

  385.             st->duration = duration;

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

  387.             get_str8(pb, buf, sizeof(buf)); /* mimetype */

  388.             st->codec->codec_type = CODEC_TYPE_DATA;

  389.             st->priv_data = ff_rm_alloc_rmstream();

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

  391.                                           get_be32(pb)) < 0)

  392.                 return -1;

  393.             break;

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

  395.             goto header_end;

  396.         default:

  397.             /* unknown tag: skip it */

  398.             url_fskip(pb, tag_size - 10);

  399.             break;

  400.         }

  401.     }

  402.  header_end:

  403.     rm->nb_packets = get_be32(pb); /* number of packets */

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

  405.         rm->nb_packets = 3600 * 25;

  406.     get_be32(pb); /* next data header */

  407.     return 0;

  408. }

  409. 

  410. static int get_num(ByteIOContext *pb, int *len)

  411. {

  412.     int n, n1;

  413. 

  414.     n = get_be16(pb);

  415.     (*len)-=2;

  416.     n &= 0x7FFF;

  417.     if (n >= 0x4000) {

  418.         return n - 0x4000;

  419.     } else {

  420.         n1 = get_be16(pb);

  421.         (*len)-=2;

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

  423.     }

  424. }

  425. 

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

  427. #define RAW_PACKET_SIZE 1000

  428. 

  429. static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){

  430.     RMDemuxContext *rm = s->priv_data;

  431.     ByteIOContext *pb = s->pb;

  432.     int len, num, res, i;

  433.     AVStream *st;

  434.     uint32_t state=0xFFFFFFFF;

  435. 

  436.     while(!url_feof(pb)){

  437.         *pos= url_ftell(pb) - 3;

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

  439.             num= rm->current_stream;

  440.             len= rm->remaining_len;

  441.             *timestamp = AV_NOPTS_VALUE;

  442.             *flags= 0;

  443.         }else{

  444.             state= (state<<8) + get_byte(pb);

  445. 

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

  447.                 len = get_be16(pb) - 6;

  448.                 if(len<0)

  449.                     continue;

  450.                 goto skip;

  451.             }

  452. 

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

  454.                 continue;

  455.             len=state;

  456.             state= 0xFFFFFFFF;

  457. 

  458.             num = get_be16(pb);

  459.             *timestamp = get_be32(pb);

  460.             res= get_byte(pb); /* reserved */

  461.             *flags = get_byte(pb); /* flags */

  462. 

  463. 

  464.             len -= 12;

  465.         }

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

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

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

  469.                 break;

  470.         }

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

  472. skip:

  473.             /* skip packet if unknown number */

  474.             url_fskip(pb, len);

  475.             rm->remaining_len -= len;

  476.             continue;

  477.         }

  478.         *stream_index= i;

  479. 

  480.         return len;

  481.     }

  482.     return -1;

  483. }

  484. 

  485. static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,

  486.                                    RMDemuxContext *rm, RMStream *vst,

  487.                                    AVPacket *pkt, int len)

  488. {

  489.     int hdr, seq, pic_num, len2, pos;

  490.     int type;

  491. 

  492.     hdr = get_byte(pb); len--;

  493.     type = hdr >> 6;

  494. 

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

  496.         seq = get_byte(pb); len--;

  497.     }

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

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

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

  501.         pic_num = get_byte(pb); len--;

  502.     }

  503.     if(len<0)

  504.         return -1;

  505.     rm->remaining_len = len;

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

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

  508.             len= len2;

  509.         if(rm->remaining_len < len)

  510.             return -1;

  511.         rm->remaining_len -= len;

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

  513.             return AVERROR(EIO);

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

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

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

  517.         get_buffer(pb, pkt->data + 9, len);

  518.         return 0;

  519.     }

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

  521. 

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

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

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

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

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

  527.             return AVERROR(ENOMEM);

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

  529.         vst->cur_slice = 0;

  530.         vst->curpic_num = pic_num;

  531.         vst->pktpos = url_ftell(pb);

  532.     }

  533.     if(type == 2)

  534.         len = FFMIN(len, pos);

  535. 

  536.     if(++vst->cur_slice > vst->slices)

  537.         return 1;

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

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

  540.     if(vst->videobufpos + len > vst->videobufsize)

  541.         return 1;

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

  543.         return AVERROR(EIO);

  544.     vst->videobufpos += len;

  545.     rm->remaining_len-= len;

  546. 

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

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

  549.         *pkt= vst->pkt;

  550.         vst->pkt.data= NULL;

  551.         vst->pkt.size= 0;

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

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

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

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

  556.         pkt->pts = AV_NOPTS_VALUE;

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

  558.         return 0;

  559.     }

  560. 

  561.     return 1;

  562. }

  563. 

  564. static inline void

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

  566. {

  567.     uint8_t *ptr;

  568.     int j;

  569. 

  570.     if (st->codec->codec_id == CODEC_ID_AC3) {

  571.         ptr = pkt->data;

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

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

  574.             ptr += 2;

  575.         }

  576.     }

  577. }

  578. 

  579. int

  580. ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,

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

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

  583. {

  584.     RMDemuxContext *rm = s->priv_data;

  585. 

  586.     if (st->codec->codec_type == CODEC_TYPE_VIDEO) {

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

  588.         if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len))

  589.             return -1; //got partial frame

  590.     } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  591.         if ((st->codec->codec_id == CODEC_ID_RA_288) ||

  592.             (st->codec->codec_id == CODEC_ID_COOK) ||

  593.             (st->codec->codec_id == CODEC_ID_ATRAC3) ||

  594.             (st->codec->codec_id == CODEC_ID_SIPR)) {

  595.             int x;

  596.             int sps = ast->sub_packet_size;

  597.             int cfs = ast->coded_framesize;

  598.             int h = ast->sub_packet_h;

  599.             int y = ast->sub_packet_cnt;

  600.             int w = ast->audio_framesize;

  601. 

  602.             if (*flags & 2)

  603.                 y = ast->sub_packet_cnt = 0;

  604.             if (!y)

  605.                 ast->audiotimestamp = *timestamp;

  606. 

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

  608.                 case CODEC_ID_RA_288:

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

  610.                         get_buffer(pb, ast->pkt.data+x*2*w+y*cfs, cfs);

  611.                     break;

  612.                 case CODEC_ID_ATRAC3:

  613.                 case CODEC_ID_COOK:

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

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

  616.                     break;

  617.             }

  618. 

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

  620.                 return -1;

  621.             else {

  622.                 ast->sub_packet_cnt = 0;

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

  624.                 rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;

  625.                 // Release first audio packet

  626.                 av_new_packet(pkt, st->codec->block_align);

  627.                 memcpy(pkt->data, ast->pkt.data, st->codec->block_align); //FIXME avoid this

  628.                 *timestamp = ast->audiotimestamp;

  629.                 *flags = 2; // Mark first packet as keyframe

  630.             }

  631.         } else if (st->codec->codec_id == CODEC_ID_AAC) {

  632.             int x;

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

  634.             ast->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;

  635.             if (ast->sub_packet_cnt) {

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

  637.                     ast->sub_packet_lengths[x] = get_be16(pb);

  638.                 // Release first audio packet

  639.                 rm->audio_pkt_cnt = ast->sub_packet_cnt - 1;

  640.                 av_get_packet(pb, pkt, ast->sub_packet_lengths[0]);

  641.                 *flags = 2; // Mark first packet as keyframe

  642.             }

  643.         } else {

  644.             av_get_packet(pb, pkt, len);

  645.             rm_ac3_swap_bytes(st, pkt);

  646.         }

  647.     } else

  648.         av_get_packet(pb, pkt, len);

  649. 

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

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

  652.         av_free_packet(pkt);

  653.         return -1;

  654.     }

  655. 

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

  657. 

  658. #if 0

  659.     if (st->codec->codec_type == CODEC_TYPE_VIDEO) {

  660.         if(st->codec->codec_id == CODEC_ID_RV20){

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

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

  663. 

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

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

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

  667.         }

  668.     }

  669. #endif

  670. 

  671.     pkt->pts= *timestamp;

  672.     if (*flags & 2)

  673.         pkt->flags |= PKT_FLAG_KEY;

  674. 

  675.     return st->codec->codec_type == CODEC_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;

  676. }

  677. 

  678. int

  679. ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,

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

  681. {

  682.     RMDemuxContext *rm = s->priv_data;

  683. 

  684.     assert (rm->audio_pkt_cnt > 0);

  685. 

  686.     if (st->codec->codec_id == CODEC_ID_AAC)

  687.         av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);

  688.     else {

  689.         av_new_packet(pkt, st->codec->block_align);

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

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

  692.                st->codec->block_align);

  693.     }

  694.     rm->audio_pkt_cnt--;

  695.     pkt->flags = 0;

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

  697. 

  698.     return rm->audio_pkt_cnt;

  699. }

  700. 

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

  702. {

  703.     RMDemuxContext *rm = s->priv_data;

  704.     ByteIOContext *pb = s->pb;

  705.     AVStream *st;

  706.     int i, len;

  707.     int64_t timestamp, pos;

  708.     int flags;

  709. 

  710.     if (rm->audio_pkt_cnt) {

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

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

  713.         ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);

  714.     } else if (rm->old_format) {

  715.         RMStream *ast;

  716. 

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

  718.         ast = st->priv_data;

  719.         if (st->codec->codec_id == CODEC_ID_RA_288) {

  720.             int x, y;

  721. 

  722.             for (y = 0; y < ast->sub_packet_h; y++)

  723.                 for (x = 0; x < ast->sub_packet_h/2; x++)

  724.                     if (get_buffer(pb, ast->pkt.data+x*2*ast->audio_framesize+y*ast->coded_framesize, ast->coded_framesize) <= 0)

  725.                         return AVERROR(EIO);

  726.             rm->audio_stream_num = 0;

  727.             rm->audio_pkt_cnt = ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - 1;

  728.             // Release first audio packet

  729.             av_new_packet(pkt, st->codec->block_align);

  730.             memcpy(pkt->data, ast->pkt.data, st->codec->block_align); //FIXME avoid this

  731.             pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe

  732.             pkt->stream_index = 0;

  733.         } else {

  734.             /* just read raw bytes */

  735.             len = RAW_PACKET_SIZE;

  736.             len= av_get_packet(pb, pkt, len);

  737.             pkt->stream_index = 0;

  738.             if (len <= 0) {

  739.                 return AVERROR(EIO);

  740.             }

  741.             pkt->size = len;

  742.         }

  743.         rm_ac3_swap_bytes(st, pkt);

  744.     } else {

  745.         int seq=1;

  746. resync:

  747.         len=sync(s, &timestamp, &flags, &i, &pos);

  748.         if(len<0)

  749.             return AVERROR(EIO);

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

  751. 

  752.         if (ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,

  753.                                 &seq, &flags, &timestamp) < 0)

  754.             goto resync;

  755. 

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

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

  758.     }

  759. 

  760.     return 0;

  761. }

  762. 

  763. static int rm_read_close(AVFormatContext *s)

  764. {

  765.     int i;

  766. 

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

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

  769. 

  770.     return 0;

  771. }

  772. 

  773. static int rm_probe(AVProbeData *p)

  774. {

  775.     /* check file header */

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

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

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

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

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

  781.         return AVPROBE_SCORE_MAX;

  782.     else

  783.         return 0;

  784. }

  785. 

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

  787.                                int64_t *ppos, int64_t pos_limit)

  788. {

  789.     RMDemuxContext *rm = s->priv_data;

  790.     int64_t pos, dts;

  791.     int stream_index2, flags, len, h;

  792. 

  793.     pos = *ppos;

  794. 

  795.     if(rm->old_format)

  796.         return AV_NOPTS_VALUE;

  797. 

  798.     url_fseek(s->pb, pos, SEEK_SET);

  799.     rm->remaining_len=0;

  800.     for(;;){

  801.         int seq=1;

  802.         AVStream *st;

  803. 

  804.         len=sync(s, &dts, &flags, &stream_index2, &pos);

  805.         if(len<0)

  806.             return AV_NOPTS_VALUE;

  807. 

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

  809.         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {

  810.             h= get_byte(s->pb); len--;

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

  812.                 seq = get_byte(s->pb); len--;

  813.             }

  814.         }

  815. 

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

  817. //            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);

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

  819.             if(stream_index2 == stream_index)

  820.                 break;

  821.         }

  822. 

  823.         url_fskip(s->pb, len);

  824.     }

  825.     *ppos = pos;

  826.     return dts;

  827. }

  828. 

  829. AVInputFormat rm_demuxer = {

  830.     "rm",

  831.     NULL_IF_CONFIG_SMALL("RM format"),

  832.     sizeof(RMDemuxContext),

  833.     rm_probe,

  834.     rm_read_header,

  835.     rm_read_packet,

  836.     rm_read_close,

  837.     NULL,

  838.     rm_read_dts,

  839. };

  840. 

  841. AVInputFormat rdt_demuxer = {

  842.     "rdt",

  843.     NULL_IF_CONFIG_SMALL("RDT demuxer"),

  844.     sizeof(RMDemuxContext),

  845.     NULL, NULL, NULL, rm_read_close, NULL, NULL

  846. };