falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
16143 Commits
32 Branches
1.0GB
Tree: f974f1faaf
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'f974f1faaf'
${ noResults }
FFmpeg/libavformat/rmdec.c

808 lines
26KB
Raw Blame History 

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

  27. {

  28.     int i;

  29.     char *q, r;

  30. 

  31.     q = buf;

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

  33.         r = get_byte(pb);

  34.         if (i < buf_size - 1)

  35.             *q++ = r;

  36.     }

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

  38. }

  39. 

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

  41. {

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

  43. }

  44. 

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

  46. {

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

  48. }

  49. 

  50. static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,

  51.                                       int read_all)

  52. {

  53.     RMContext *rm = s->priv_data;

  54.     ByteIOContext *pb = s->pb;

  55.     char buf[256];

  56.     uint32_t version;

  57.     int i;

  58. 

  59.     /* ra type header */

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

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

  62.         int64_t startpos = url_ftell(pb);

  63.         /* very old version */

  64.         for(i = 0; i < 14; i++)

  65.             get_byte(pb);

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

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

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

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

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

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

  72.         get_byte(pb);

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

  74.         }

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

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

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

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

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

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

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

  82.     } else {

  83.         int flavor, sub_packet_h, coded_framesize, sub_packet_size;

  84.         /* old version (4) */

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

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

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

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

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

  90.         rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */

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

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

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

  94.         rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */

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

  96.         rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */

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

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

  99.             get_be16(pb); get_be16(pb); get_be16(pb); }

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

  101.         get_be32(pb);

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

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

  104.             get_be32(pb);

  105.             buf[0] = get_byte(pb);

  106.             buf[1] = get_byte(pb);

  107.             buf[2] = get_byte(pb);

  108.             buf[3] = get_byte(pb);

  109.             buf[4] = 0;

  110.         } else {

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

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

  113.         }

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

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

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

  117.             st->need_parsing = AVSTREAM_PARSE_FULL;

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

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

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

  121.             rm->audio_framesize = st->codec->block_align;

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

  123. 

  124.             if(rm->audio_framesize >= UINT_MAX / sub_packet_h){

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

  126.                 return -1;

  127.             }

  128. 

  129.             rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);

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

  131.             int codecdata_length, i;

  132.             get_be16(pb); get_byte(pb);

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

  134.                 get_byte(pb);

  135.             codecdata_length = get_be32(pb);

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

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

  138.                 return -1;

  139.             }

  140. 

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

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

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

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

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

  146.             for(i = 0; i < codecdata_length; i++)

  147.                 ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);

  148.             rm->audio_framesize = st->codec->block_align;

  149.             st->codec->block_align = rm->sub_packet_size;

  150. 

  151.             if(rm->audio_framesize >= UINT_MAX / sub_packet_h){

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

  153.                 return -1;

  154.             }

  155. 

  156.             rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);

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

  158.             int codecdata_length, i;

  159.             get_be16(pb); get_byte(pb);

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

  161.                 get_byte(pb);

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

  163.             codecdata_length = get_be32(pb);

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

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

  166.                 return -1;

  167.             }

  168.             if (codecdata_length >= 1) {

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

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

  171.                 get_byte(pb);

  172.                 for(i = 0; i < st->codec->extradata_size; i++)

  173.                     ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);

  174.             }

  175.         } else {

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

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

  178.         }

  179.         if (read_all) {

  180.             get_byte(pb);

  181.             get_byte(pb);

  182.             get_byte(pb);

  183. 

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

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

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

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

  188.         }

  189.     }

  190.     return 0;

  191. }

  192. 

  193. int

  194. ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVStream *st, int codec_data_size)

  195. {

  196.     ByteIOContext *pb = s->pb;

  197.     unsigned int v;

  198.     int size;

  199.     int64_t codec_pos;

  200. 

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

  202.     codec_pos = url_ftell(pb);

  203.     v = get_be32(pb);

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

  205.         /* ra type header */

  206.         if (rm_read_audio_stream_info(s, st, 0))

  207.             return -1;

  208.     } else {

  209.         int fps, fps2;

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

  211.         fail1:

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

  213.             goto skip;

  214.         }

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

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

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

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

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

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

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

  222.             goto fail1;

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

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

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

  226.         fps= get_be16(pb);

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

  228.         get_be32(pb);

  229.         fps2= get_be16(pb);

  230.         get_be16(pb);

  231. 

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

  233. 

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

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

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

  237.             return -1;

  238.         }

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

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

  241.             return AVERROR(ENOMEM);

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

  243. 

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

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

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

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

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

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

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

  251.         default: goto fail1;

  252.         }

  253.     }

  254. 

  255. skip:

  256.     /* skip codec info */

  257.     size = url_ftell(pb) - codec_pos;

  258.     url_fskip(pb, codec_data_size - size);

  259. 

  260.     return 0;

  261. }

  262. 

  263. 

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

  265. {

  266.     RMContext *rm = s->priv_data;

  267.     AVStream *st;

  268. 

  269.     rm->old_format = 1;

  270.     st = av_new_stream(s, 0);

  271.     if (!st)

  272.         return -1;

  273.     return rm_read_audio_stream_info(s, st, 1);

  274. }

  275. 

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

  277. {

  278.     RMContext *rm = s->priv_data;

  279.     AVStream *st;

  280.     ByteIOContext *pb = s->pb;

  281.     unsigned int tag;

  282.     int tag_size;

  283.     unsigned int start_time, duration;

  284.     char buf[128];

  285.     int flags = 0;

  286. 

  287.     tag = get_le32(pb);

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

  289.         /* very old .ra format */

  290.         return rm_read_header_old(s, ap);

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

  292.         return AVERROR(EIO);

  293.     }

  294. 

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

  296.     get_be16(pb);

  297.     get_be32(pb);

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

  299. 

  300.     for(;;) {

  301.         if (url_feof(pb))

  302.             return -1;

  303.         tag = get_le32(pb);

  304.         tag_size = get_be32(pb);

  305.         get_be16(pb);

  306. #if 0

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

  308.                (tag) & 0xff,

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

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

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

  312.                tag,

  313.                tag_size);

  314. #endif

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

  316.             return -1;

  317.         switch(tag) {

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

  319.             /* file header */

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

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

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

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

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

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

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

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

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

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

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

  331.             break;

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

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

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

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

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

  337.             break;

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

  339.             st = av_new_stream(s, 0);

  340.             if (!st)

  341.                 return AVERROR(ENOMEM);

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

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

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

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

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

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

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

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

  350.             st->start_time = start_time;

  351.             st->duration = duration;

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

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

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

  355.             if (ff_rm_read_mdpr_codecdata(s, st, get_be32(pb)) < 0)

  356.                 return -1;

  357.             break;

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

  359.             goto header_end;

  360.         default:

  361.             /* unknown tag: skip it */

  362.             url_fskip(pb, tag_size - 10);

  363.             break;

  364.         }

  365.     }

  366.  header_end:

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

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

  369.         rm->nb_packets = 3600 * 25;

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

  371.     rm->curpic_num = -1;

  372.     return 0;

  373. }

  374. 

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

  376. {

  377.     int n, n1;

  378. 

  379.     n = get_be16(pb);

  380.     (*len)-=2;

  381.     n &= 0x7FFF;

  382.     if (n >= 0x4000) {

  383.         return n - 0x4000;

  384.     } else {

  385.         n1 = get_be16(pb);

  386.         (*len)-=2;

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

  388.     }

  389. }

  390. 

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

  392. #define RAW_PACKET_SIZE 1000

  393. 

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

  395.     RMContext *rm = s->priv_data;

  396.     ByteIOContext *pb = s->pb;

  397.     int len, num, res, i;

  398.     AVStream *st;

  399.     uint32_t state=0xFFFFFFFF;

  400. 

  401.     while(!url_feof(pb)){

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

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

  404.             num= rm->current_stream;

  405.             len= rm->remaining_len;

  406.             *timestamp = AV_NOPTS_VALUE;

  407.             *flags= 0;

  408.         }else{

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

  410. 

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

  412.                 len = get_be16(pb) - 6;

  413.                 if(len<0)

  414.                     continue;

  415.                 goto skip;

  416.             }

  417. 

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

  419.                 continue;

  420.             len=state;

  421.             state= 0xFFFFFFFF;

  422. 

  423.             num = get_be16(pb);

  424.             *timestamp = get_be32(pb);

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

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

  427. 

  428. 

  429.             len -= 12;

  430.         }

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

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

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

  434.                 break;

  435.         }

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

  437. skip:

  438.             /* skip packet if unknown number */

  439.             url_fskip(pb, len);

  440.             rm->remaining_len -= len;

  441.             continue;

  442.         }

  443.         *stream_index= i;

  444. 

  445.         return len;

  446.     }

  447.     return -1;

  448. }

  449. 

  450. static int rm_assemble_video_frame(AVFormatContext *s, RMContext *rm, AVPacket *pkt, int len)

  451. {

  452.     ByteIOContext *pb = s->pb;

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

  454.     int type;

  455. 

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

  457.     type = hdr >> 6;

  458.     switch(type){

  459.     case 0: // slice

  460.     case 2: // last slice

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

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

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

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

  465.         rm->remaining_len = len;

  466.         break;

  467.     case 1: //whole frame

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

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

  470.             return AVERROR(EIO);

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

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

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

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

  475.         rm->remaining_len = 0;

  476.         return 0;

  477.     case 3: //frame as a part of packet

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

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

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

  481.         rm->remaining_len = len - len2;

  482.         if(av_new_packet(pkt, len2 + 9) < 0)

  483.             return AVERROR(EIO);

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

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

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

  487.         get_buffer(pb, pkt->data + 9, len2);

  488.         return 0;

  489.     }

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

  491. 

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

  493.         rm->slices = ((hdr & 0x3F) << 1) + 1;

  494.         rm->videobufsize = len2 + 8*rm->slices + 1;

  495.         av_free(rm->videobuf);

  496.         if(!(rm->videobuf = av_malloc(rm->videobufsize)))

  497.             return AVERROR(ENOMEM);

  498.         rm->videobufpos = 8*rm->slices + 1;

  499.         rm->cur_slice = 0;

  500.         rm->curpic_num = pic_num;

  501.         rm->pktpos = url_ftell(pb);

  502.     }

  503.     if(type == 2)

  504.         len = FFMIN(len, pos);

  505. 

  506.     if(++rm->cur_slice > rm->slices)

  507.         return 1;

  508.     AV_WL32(rm->videobuf - 7 + 8*rm->cur_slice, 1);

  509.     AV_WL32(rm->videobuf - 3 + 8*rm->cur_slice, rm->videobufpos - 8*rm->slices - 1);

  510.     if(rm->videobufpos + len > rm->videobufsize)

  511.         return 1;

  512.     if (get_buffer(pb, rm->videobuf + rm->videobufpos, len) != len)

  513.         return AVERROR(EIO);

  514.     rm->videobufpos += len;

  515.     rm->remaining_len-= len;

  516. 

  517.     if(type == 2 || (rm->videobufpos) == rm->videobufsize){

  518.          rm->videobuf[0] = rm->cur_slice-1;

  519.          if(av_new_packet(pkt, rm->videobufpos - 8*(rm->slices - rm->cur_slice)) < 0)

  520.              return AVERROR(ENOMEM);

  521.          memcpy(pkt->data, rm->videobuf, 1 + 8*rm->cur_slice);

  522.          memcpy(pkt->data + 1 + 8*rm->cur_slice, rm->videobuf + 1 + 8*rm->slices,

  523.                 rm->videobufpos - 1 - 8*rm->slices);

  524.          pkt->pts = AV_NOPTS_VALUE;

  525.          pkt->pos = rm->pktpos;

  526.          return 0;

  527.     }

  528. 

  529.     return 1;

  530. }

  531. 

  532. static inline void

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

  534. {

  535.     uint8_t *ptr;

  536.     int j;

  537. 

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

  539.         ptr = pkt->data;

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

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

  542.             ptr += 2;

  543.         }

  544.     }

  545. }

  546. 

  547. int

  548. ff_rm_parse_packet (AVFormatContext *s, AVStream *st, int len, AVPacket *pkt,

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

  550. {

  551.     ByteIOContext *pb = s->pb;

  552.     RMContext *rm = s->priv_data;

  553. 

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

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

  556.         if(rm_assemble_video_frame(s, rm, pkt, len) == 1)

  557.             return -1; //got partial frame

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

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

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

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

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

  563.             int x;

  564.             int sps = rm->sub_packet_size;

  565.             int cfs = rm->coded_framesize;

  566.             int h = rm->sub_packet_h;

  567.             int y = rm->sub_packet_cnt;

  568.             int w = rm->audio_framesize;

  569. 

  570.             if (*flags & 2)

  571.                 y = rm->sub_packet_cnt = 0;

  572.             if (!y)

  573.                 rm->audiotimestamp = *timestamp;

  574. 

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

  576.                 case CODEC_ID_RA_288:

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

  578.                         get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);

  579.                     break;

  580.                 case CODEC_ID_ATRAC3:

  581.                 case CODEC_ID_COOK:

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

  583.                         get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);

  584.                     break;

  585.             }

  586. 

  587.             if (++(rm->sub_packet_cnt) < h)

  588.                 return -1;

  589.             else {

  590.                 rm->sub_packet_cnt = 0;

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

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

  593.                 // Release first audio packet

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

  595.                 memcpy(pkt->data, rm->audiobuf, st->codec->block_align);

  596.                 *timestamp = rm->audiotimestamp;

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

  598.             }

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

  600.             int x;

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

  602.             rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;

  603.             if (rm->sub_packet_cnt) {

  604.                 for (x = 0; x < rm->sub_packet_cnt; x++)

  605.                     rm->sub_packet_lengths[x] = get_be16(pb);

  606.                 // Release first audio packet

  607.                 rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;

  608.                 av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);

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

  610.             }

  611.         } else {

  612.             av_get_packet(pb, pkt, len);

  613.             rm_ac3_swap_bytes(st, pkt);

  614.         }

  615.     } else

  616.         av_get_packet(pb, pkt, len);

  617. 

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

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

  620.         av_free_packet(pkt);

  621.         return -1;

  622.     }

  623. 

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

  625. 

  626. #if 0

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

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

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

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

  631. 

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

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

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

  635.         }

  636.     }

  637. #endif

  638. 

  639.     pkt->pts= *timestamp;

  640.     if (*flags & 2)

  641.         pkt->flags |= PKT_FLAG_KEY;

  642. 

  643.     return 0;

  644. }

  645. 

  646. void

  647. ff_rm_retrieve_cache (AVFormatContext *s, AVStream *st, AVPacket *pkt)

  648. {

  649.     ByteIOContext *pb = s->pb;

  650.     RMContext *rm = s->priv_data;

  651. 

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

  653. 

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

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

  656.     else {

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

  658.         memcpy(pkt->data, rm->audiobuf + st->codec->block_align *

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

  660.                st->codec->block_align);

  661.     }

  662.     rm->audio_pkt_cnt--;

  663.     pkt->flags = 0;

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

  665. }

  666. 

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

  668. {

  669.     RMContext *rm = s->priv_data;

  670.     ByteIOContext *pb = s->pb;

  671.     AVStream *st;

  672.     int i, len;

  673.     int64_t timestamp, pos;

  674.     int flags;

  675. 

  676.     if (rm->audio_pkt_cnt) {

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

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

  679.         ff_rm_retrieve_cache(s, st, pkt);

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

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

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

  683.             int x, y;

  684. 

  685.             for (y = 0; y < rm->sub_packet_h; y++)

  686.                 for (x = 0; x < rm->sub_packet_h/2; x++)

  687.                     if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)

  688.                         return AVERROR(EIO);

  689.             rm->audio_stream_num = 0;

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

  691.             // Release first audio packet

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

  693.             memcpy(pkt->data, rm->audiobuf, st->codec->block_align);

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

  695.             pkt->stream_index = 0;

  696.         } else {

  697.             /* just read raw bytes */

  698.             len = RAW_PACKET_SIZE;

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

  700.             pkt->stream_index = 0;

  701.             if (len <= 0) {

  702.                 return AVERROR(EIO);

  703.             }

  704.             pkt->size = len;

  705.         }

  706.         rm_ac3_swap_bytes(st, pkt);

  707.     } else {

  708.         int seq=1;

  709. resync:

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

  711.         if(len<0)

  712.             return AVERROR(EIO);

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

  714. 

  715.         if (ff_rm_parse_packet (s, st, len, pkt, &seq, &flags, &timestamp) < 0)

  716.             goto resync;

  717. 

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

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

  720.     }

  721. 

  722.     return 0;

  723. }

  724. 

  725. static int rm_read_close(AVFormatContext *s)

  726. {

  727.     RMContext *rm = s->priv_data;

  728. 

  729.     av_free(rm->audiobuf);

  730.     av_free(rm->videobuf);

  731.     return 0;

  732. }

  733. 

  734. static int rm_probe(AVProbeData *p)

  735. {

  736.     /* check file header */

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

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

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

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

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

  742.         return AVPROBE_SCORE_MAX;

  743.     else

  744.         return 0;

  745. }

  746. 

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

  748.                                int64_t *ppos, int64_t pos_limit)

  749. {

  750.     RMContext *rm = s->priv_data;

  751.     int64_t pos, dts;

  752.     int stream_index2, flags, len, h;

  753. 

  754.     pos = *ppos;

  755. 

  756.     if(rm->old_format)

  757.         return AV_NOPTS_VALUE;

  758. 

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

  760.     rm->remaining_len=0;

  761.     for(;;){

  762.         int seq=1;

  763.         AVStream *st;

  764. 

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

  766.         if(len<0)

  767.             return AV_NOPTS_VALUE;

  768. 

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

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

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

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

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

  774.             }

  775.         }

  776. 

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

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

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

  780.             if(stream_index2 == stream_index)

  781.                 break;

  782.         }

  783. 

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

  785.     }

  786.     *ppos = pos;

  787.     return dts;

  788. }

  789. 

  790. AVInputFormat rm_demuxer = {

  791.     "rm",

  792.     NULL_IF_CONFIG_SMALL("RM format"),

  793.     sizeof(RMContext),

  794.     rm_probe,

  795.     rm_read_header,

  796.     rm_read_packet,

  797.     rm_read_close,

  798.     NULL,

  799.     rm_read_dts,

  800. };

  801. 

  802. AVInputFormat rdt_demuxer = {

  803.     "rdt",

  804.     NULL_IF_CONFIG_SMALL("RDT demuxer"),

  805.     sizeof(RMContext),

  806.     NULL, NULL, NULL, rm_read_close, NULL, NULL

  807. };