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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 "avformat.h"

  24. #include "rm.h"

  25. 

  26. struct RMStream {

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

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

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

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

  31.     int cur_slice, slices;

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

  33.     /// Audio descrambling matrix parameters

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

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

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

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

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

  39. };

  40. 

  41. typedef struct {

  42.     int nb_packets;

  43.     int old_format;

  44.     int current_stream;

  45.     int remaining_len;

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

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

  48. } RMDemuxContext;

  49. 

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

  51. {

  52.     int i;

  53.     char *q, r;

  54. 

  55.     q = buf;

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

  57.         r = get_byte(pb);

  58.         if (i < buf_size - 1)

  59.             *q++ = r;

  60.     }

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

  62. }

  63. 

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

  65. {

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

  67. }

  68. 

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

  70. {

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

  72. }

  73. 

  74. RMStream *ff_rm_alloc_rmstream (void)

  75. {

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

  77.     rms->curpic_num = -1;

  78.     return rms;

  79. }

  80. 

  81. void ff_rm_free_rmstream (RMStream *rms)

  82. {

  83.     av_free_packet(&rms->pkt);

  84. }

  85. 

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

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

  88. {

  89.     char buf[256];

  90.     uint32_t version;

  91. 

  92.     /* ra type header */

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

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

  95.         int64_t startpos = url_ftell(pb);

  96.         url_fskip(pb, 14);

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

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

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

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

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

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

  103.             get_byte(pb);

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

  105.         }

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

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

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

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

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

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

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

  113.     } else {

  114.         int flavor, sub_packet_h, coded_framesize, sub_packet_size;

  115.         /* old version (4) */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  130.             get_be16(pb); get_be16(pb); get_be16(pb);

  131.         }

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

  133.         get_be32(pb);

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

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

  136.             get_be32(pb);

  137.             get_buffer(pb, buf, 4);

  138.             buf[4] = 0;

  139.         } else {

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

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

  142.         }

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

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

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

  146.             st->need_parsing = AVSTREAM_PARSE_FULL;

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

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

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

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

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

  152. 

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

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

  155.                 return -1;

  156.             }

  157. 

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

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

  160.             int codecdata_length;

  161.             get_be16(pb); get_byte(pb);

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

  163.                 get_byte(pb);

  164.             codecdata_length = get_be32(pb);

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

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

  167.                 return -1;

  168.             }

  169. 

  170.             if(sub_packet_size <= 0){

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

  172.                 return -1;

  173.             }

  174. 

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

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

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

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

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

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

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

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

  183. 

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

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

  186.                 return -1;

  187.             }

  188. 

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

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

  191.             int codecdata_length;

  192.             get_be16(pb); get_byte(pb);

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

  194.                 get_byte(pb);

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

  196.             codecdata_length = get_be32(pb);

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

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

  199.                 return -1;

  200.             }

  201.             if (codecdata_length >= 1) {

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

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

  204.                 get_byte(pb);

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

  206.             }

  207.         } else {

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

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

  210.         }

  211.         if (read_all) {

  212.             get_byte(pb);

  213.             get_byte(pb);

  214.             get_byte(pb);

  215. 

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

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

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

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

  220.         }

  221.     }

  222.     return 0;

  223. }

  224. 

  225. int

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

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

  228. {

  229.     unsigned int v;

  230.     int size;

  231.     int64_t codec_pos;

  232. 

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

  234.     codec_pos = url_ftell(pb);

  235.     v = get_be32(pb);

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

  237.         /* ra type header */

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

  239.             return -1;

  240.     } else {

  241.         int fps, fps2;

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

  243.         fail1:

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

  245.             goto skip;

  246.         }

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

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

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

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

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

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

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

  254.             goto fail1;

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

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

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

  258.         fps= get_be16(pb);

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

  260.         get_be32(pb);

  261.         fps2= get_be16(pb);

  262.         get_be16(pb);

  263. 

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

  265. 

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

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

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

  269.             return -1;

  270.         }

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

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

  273.             return AVERROR(ENOMEM);

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

  275. 

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

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

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

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

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

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

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

  283.         default: goto fail1;

  284.         }

  285.     }

  286. 

  287. skip:

  288.     /* skip codec info */

  289.     size = url_ftell(pb) - codec_pos;

  290.     url_fskip(pb, codec_data_size - size);

  291. 

  292.     return 0;

  293. }

  294. 

  295. 

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

  297. {

  298.     RMDemuxContext *rm = s->priv_data;

  299.     AVStream *st;

  300. 

  301.     rm->old_format = 1;

  302.     st = av_new_stream(s, 0);

  303.     if (!st)

  304.         return -1;

  305.     st->priv_data = ff_rm_alloc_rmstream();

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

  307. }

  308. 

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

  310. {

  311.     RMDemuxContext *rm = s->priv_data;

  312.     AVStream *st;

  313.     ByteIOContext *pb = s->pb;

  314.     unsigned int tag;

  315.     int tag_size;

  316.     unsigned int start_time, duration;

  317.     char buf[128];

  318.     int flags = 0;

  319. 

  320.     tag = get_le32(pb);

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

  322.         /* very old .ra format */

  323.         return rm_read_header_old(s, ap);

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

  325.         return AVERROR(EIO);

  326.     }

  327. 

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

  329.     get_be16(pb);

  330.     get_be32(pb);

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

  332. 

  333.     for(;;) {

  334.         if (url_feof(pb))

  335.             return -1;

  336.         tag = get_le32(pb);

  337.         tag_size = get_be32(pb);

  338.         get_be16(pb);

  339. #if 0

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

  341.                (tag) & 0xff,

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

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

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

  345.                tag,

  346.                tag_size);

  347. #endif

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

  349.             return -1;

  350.         switch(tag) {

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

  352.             /* file header */

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

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

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

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

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

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

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

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

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

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

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

  364.             break;

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

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

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

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

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

  370.             break;

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

  372.             st = av_new_stream(s, 0);

  373.             if (!st)

  374.                 return AVERROR(ENOMEM);

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

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

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

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

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

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

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

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

  383.             st->start_time = start_time;

  384.             st->duration = duration;

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

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

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

  388.             st->priv_data = ff_rm_alloc_rmstream();

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

  390.                                           get_be32(pb)) < 0)

  391.                 return -1;

  392.             break;

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

  394.             goto header_end;

  395.         default:

  396.             /* unknown tag: skip it */

  397.             url_fskip(pb, tag_size - 10);

  398.             break;

  399.         }

  400.     }

  401.  header_end:

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

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

  404.         rm->nb_packets = 3600 * 25;

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

  406.     return 0;

  407. }

  408. 

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

  410. {

  411.     int n, n1;

  412. 

  413.     n = get_be16(pb);

  414.     (*len)-=2;

  415.     n &= 0x7FFF;

  416.     if (n >= 0x4000) {

  417.         return n - 0x4000;

  418.     } else {

  419.         n1 = get_be16(pb);

  420.         (*len)-=2;

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

  422.     }

  423. }

  424. 

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

  426. #define RAW_PACKET_SIZE 1000

  427. 

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

  429.     RMDemuxContext *rm = s->priv_data;

  430.     ByteIOContext *pb = s->pb;

  431.     int len, num, res, i;

  432.     AVStream *st;

  433.     uint32_t state=0xFFFFFFFF;

  434. 

  435.     while(!url_feof(pb)){

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

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

  438.             num= rm->current_stream;

  439.             len= rm->remaining_len;

  440.             *timestamp = AV_NOPTS_VALUE;

  441.             *flags= 0;

  442.         }else{

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

  444. 

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

  446.                 len = get_be16(pb) - 6;

  447.                 if(len<0)

  448.                     continue;

  449.                 goto skip;

  450.             }

  451. 

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

  453.                 continue;

  454.             len=state;

  455.             state= 0xFFFFFFFF;

  456. 

  457.             num = get_be16(pb);

  458.             *timestamp = get_be32(pb);

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

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

  461. 

  462. 

  463.             len -= 12;

  464.         }

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

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

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

  468.                 break;

  469.         }

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

  471. skip:

  472.             /* skip packet if unknown number */

  473.             url_fskip(pb, len);

  474.             rm->remaining_len -= len;

  475.             continue;

  476.         }

  477.         *stream_index= i;

  478. 

  479.         return len;

  480.     }

  481.     return -1;

  482. }

  483. 

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

  485.                                    RMDemuxContext *rm, RMStream *vst,

  486.                                    AVPacket *pkt, int len)

  487. {

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

  489.     int type;

  490. 

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

  492.     type = hdr >> 6;

  493. 

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

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

  496.     }

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

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

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

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

  501.     }

  502.     if(len<0)

  503.         return -1;

  504.     rm->remaining_len = len;

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

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

  507.             len= len2;

  508.         if(rm->remaining_len < len)

  509.             return -1;

  510.         rm->remaining_len -= len;

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

  512.             return AVERROR(EIO);

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

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

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

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

  517.         return 0;

  518.     }

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

  520. 

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

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

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

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

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

  526.             return AVERROR(ENOMEM);

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

  528.         vst->cur_slice = 0;

  529.         vst->curpic_num = pic_num;

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

  531.     }

  532.     if(type == 2)

  533.         len = FFMIN(len, pos);

  534. 

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

  536.         return 1;

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

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

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

  540.         return 1;

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

  542.         return AVERROR(EIO);

  543.     vst->videobufpos += len;

  544.     rm->remaining_len-= len;

  545. 

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

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

  548.         *pkt= vst->pkt;

  549.         vst->pkt.data= NULL;

  550.         vst->pkt.size= 0;

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

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

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

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

  555.         pkt->pts = AV_NOPTS_VALUE;

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

  557.         return 0;

  558.     }

  559. 

  560.     return 1;

  561. }

  562. 

  563. static inline void

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

  565. {

  566.     uint8_t *ptr;

  567.     int j;

  568. 

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

  570.         ptr = pkt->data;

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

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

  573.             ptr += 2;

  574.         }

  575.     }

  576. }

  577. 

  578. int

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

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

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

  582. {

  583.     RMDemuxContext *rm = s->priv_data;

  584. 

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

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

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

  588.             return -1; //got partial frame

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

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

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

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

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

  594.             int x;

  595.             int sps = ast->sub_packet_size;

  596.             int cfs = ast->coded_framesize;

  597.             int h = ast->sub_packet_h;

  598.             int y = ast->sub_packet_cnt;

  599.             int w = ast->audio_framesize;

  600. 

  601.             if (*flags & 2)

  602.                 y = ast->sub_packet_cnt = 0;

  603.             if (!y)

  604.                 ast->audiotimestamp = *timestamp;

  605. 

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

  607.                 case CODEC_ID_RA_288:

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

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

  610.                     break;

  611.                 case CODEC_ID_ATRAC3:

  612.                 case CODEC_ID_COOK:

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

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

  615.                     break;

  616.             }

  617. 

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

  619.                 return -1;

  620.             else {

  621.                 ast->sub_packet_cnt = 0;

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

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

  624.                 // Release first audio packet

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

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

  627.                 *timestamp = ast->audiotimestamp;

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

  629.             }

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

  631.             int x;

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

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

  634.             if (ast->sub_packet_cnt) {

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

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

  637.                 // Release first audio packet

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

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

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

  641.             }

  642.         } else {

  643.             av_get_packet(pb, pkt, len);

  644.             rm_ac3_swap_bytes(st, pkt);

  645.         }

  646.     } else

  647.         av_get_packet(pb, pkt, len);

  648. 

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

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

  651.         av_free_packet(pkt);

  652.         return -1;

  653.     }

  654. 

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

  656. 

  657. #if 0

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

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

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

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

  662. 

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

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

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

  666.         }

  667.     }

  668. #endif

  669. 

  670.     pkt->pts= *timestamp;

  671.     if (*flags & 2)

  672.         pkt->flags |= PKT_FLAG_KEY;

  673. 

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

  675. }

  676. 

  677. int

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

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

  680. {

  681.     RMDemuxContext *rm = s->priv_data;

  682. 

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

  684. 

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

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

  687.     else {

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

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

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

  691.                st->codec->block_align);

  692.     }

  693.     rm->audio_pkt_cnt--;

  694.     pkt->flags = 0;

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

  696. 

  697.     return rm->audio_pkt_cnt;

  698. }

  699. 

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

  701. {

  702.     RMDemuxContext *rm = s->priv_data;

  703.     ByteIOContext *pb = s->pb;

  704.     AVStream *st;

  705.     int i, len;

  706.     int64_t timestamp, pos;

  707.     int flags;

  708. 

  709.     if (rm->audio_pkt_cnt) {

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

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

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

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

  714.         RMStream *ast;

  715. 

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

  717.         ast = st->priv_data;

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

  719.             int x, y;

  720. 

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

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

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

  724.                         return AVERROR(EIO);

  725.             rm->audio_stream_num = 0;

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

  727.             // Release first audio packet

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

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

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

  731.             pkt->stream_index = 0;

  732.         } else {

  733.             /* just read raw bytes */

  734.             len = RAW_PACKET_SIZE;

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

  736.             pkt->stream_index = 0;

  737.             if (len <= 0) {

  738.                 return AVERROR(EIO);

  739.             }

  740.             pkt->size = len;

  741.         }

  742.         rm_ac3_swap_bytes(st, pkt);

  743.     } else {

  744.         int seq=1;

  745. resync:

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

  747.         if(len<0)

  748.             return AVERROR(EIO);

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

  750. 

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

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

  753.             goto resync;

  754. 

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

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

  757.     }

  758. 

  759.     return 0;

  760. }

  761. 

  762. static int rm_read_close(AVFormatContext *s)

  763. {

  764.     int i;

  765. 

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

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

  768. 

  769.     return 0;

  770. }

  771. 

  772. static int rm_probe(AVProbeData *p)

  773. {

  774.     /* check file header */

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

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

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

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

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

  780.         return AVPROBE_SCORE_MAX;

  781.     else

  782.         return 0;

  783. }

  784. 

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

  786.                                int64_t *ppos, int64_t pos_limit)

  787. {

  788.     RMDemuxContext *rm = s->priv_data;

  789.     int64_t pos, dts;

  790.     int stream_index2, flags, len, h;

  791. 

  792.     pos = *ppos;

  793. 

  794.     if(rm->old_format)

  795.         return AV_NOPTS_VALUE;

  796. 

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

  798.     rm->remaining_len=0;

  799.     for(;;){

  800.         int seq=1;

  801.         AVStream *st;

  802. 

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

  804.         if(len<0)

  805.             return AV_NOPTS_VALUE;

  806. 

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

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

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

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

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

  812.             }

  813.         }

  814. 

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

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

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

  818.             if(stream_index2 == stream_index)

  819.                 break;

  820.         }

  821. 

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

  823.     }

  824.     *ppos = pos;

  825.     return dts;

  826. }

  827. 

  828. AVInputFormat rm_demuxer = {

  829.     "rm",

  830.     NULL_IF_CONFIG_SMALL("RM format"),

  831.     sizeof(RMDemuxContext),

  832.     rm_probe,

  833.     rm_read_header,

  834.     rm_read_packet,

  835.     rm_read_close,

  836.     NULL,

  837.     rm_read_dts,

  838. };

  839. 

  840. AVInputFormat rdt_demuxer = {

  841.     "rdt",

  842.     NULL_IF_CONFIG_SMALL("RDT demuxer"),

  843.     sizeof(RMDemuxContext),

  844.     NULL, NULL, NULL, rm_read_close, NULL, NULL

  845. };