Libav
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00001 /* 00002 * "Real" compatible demuxer. 00003 * Copyright (c) 2000, 2001 Fabrice Bellard 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #include "libavutil/avstring.h" 00023 #include "libavutil/intreadwrite.h" 00024 #include "avformat.h" 00025 #include "riff.h" 00026 #include "rm.h" 00027 00028 struct RMStream { 00029 AVPacket pkt; 00030 int videobufsize; 00031 int videobufpos; 00032 int curpic_num; 00033 int cur_slice, slices; 00034 int64_t pktpos; 00035 00036 int64_t audiotimestamp; 00037 int sub_packet_cnt; // Subpacket counter, used while reading 00038 int sub_packet_size, sub_packet_h, coded_framesize; 00039 int audio_framesize; 00040 int sub_packet_lengths[16]; 00041 }; 00042 00043 typedef struct { 00044 int nb_packets; 00045 int old_format; 00046 int current_stream; 00047 int remaining_len; 00048 int audio_stream_num; 00049 int audio_pkt_cnt; 00050 } RMDemuxContext; 00051 00052 static const AVCodecTag rm_codec_tags[] = { 00053 { CODEC_ID_RV10, MKTAG('R','V','1','0') }, 00054 { CODEC_ID_RV20, MKTAG('R','V','2','0') }, 00055 { CODEC_ID_RV20, MKTAG('R','V','T','R') }, 00056 { CODEC_ID_RV30, MKTAG('R','V','3','0') }, 00057 { CODEC_ID_RV40, MKTAG('R','V','4','0') }, 00058 { CODEC_ID_AC3, MKTAG('d','n','e','t') }, 00059 { CODEC_ID_RA_144, MKTAG('l','p','c','J') }, 00060 { CODEC_ID_RA_288, MKTAG('2','8','_','8') }, 00061 { CODEC_ID_COOK, MKTAG('c','o','o','k') }, 00062 { CODEC_ID_ATRAC3, MKTAG('a','t','r','c') }, 00063 { CODEC_ID_SIPR, MKTAG('s','i','p','r') }, 00064 { CODEC_ID_AAC, MKTAG('r','a','a','c') }, 00065 { CODEC_ID_AAC, MKTAG('r','a','c','p') }, 00066 { CODEC_ID_NONE }, 00067 }; 00068 00069 static const unsigned char sipr_swaps[38][2] = { 00070 { 0, 63 }, { 1, 22 }, { 2, 44 }, { 3, 90 }, 00071 { 5, 81 }, { 7, 31 }, { 8, 86 }, { 9, 58 }, 00072 { 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 }, 00073 { 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 }, 00074 { 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 }, 00075 { 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 }, 00076 { 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 }, 00077 { 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 }, 00078 { 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 }, 00079 { 67, 83 }, { 77, 80 } 00080 }; 00081 00082 const unsigned char ff_sipr_subpk_size[4] = { 29, 19, 37, 20 }; 00083 00084 static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len) 00085 { 00086 int i; 00087 char *q, r; 00088 00089 q = buf; 00090 for(i=0;i<len;i++) { 00091 r = get_byte(pb); 00092 if (i < buf_size - 1) 00093 *q++ = r; 00094 } 00095 if (buf_size > 0) *q = '\0'; 00096 } 00097 00098 static void get_str8(ByteIOContext *pb, char *buf, int buf_size) 00099 { 00100 get_strl(pb, buf, buf_size, get_byte(pb)); 00101 } 00102 00103 static int rm_read_extradata(ByteIOContext *pb, AVCodecContext *avctx, unsigned size) 00104 { 00105 if (size >= 1<<24) 00106 return -1; 00107 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); 00108 if (!avctx->extradata) 00109 return AVERROR(ENOMEM); 00110 avctx->extradata_size = get_buffer(pb, avctx->extradata, size); 00111 memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); 00112 if (avctx->extradata_size != size) 00113 return AVERROR(EIO); 00114 return 0; 00115 } 00116 00117 static void rm_read_metadata(AVFormatContext *s, int wide) 00118 { 00119 char buf[1024]; 00120 int i; 00121 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) { 00122 int len = wide ? get_be16(s->pb) : get_byte(s->pb); 00123 get_strl(s->pb, buf, sizeof(buf), len); 00124 av_metadata_set2(&s->metadata, ff_rm_metadata[i], buf, 0); 00125 } 00126 } 00127 00128 RMStream *ff_rm_alloc_rmstream (void) 00129 { 00130 RMStream *rms = av_mallocz(sizeof(RMStream)); 00131 rms->curpic_num = -1; 00132 return rms; 00133 } 00134 00135 void ff_rm_free_rmstream (RMStream *rms) 00136 { 00137 av_free_packet(&rms->pkt); 00138 } 00139 00140 static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb, 00141 AVStream *st, RMStream *ast, int read_all) 00142 { 00143 char buf[256]; 00144 uint32_t version; 00145 int ret; 00146 00147 /* ra type header */ 00148 version = get_be16(pb); /* version */ 00149 if (version == 3) { 00150 int header_size = get_be16(pb); 00151 int64_t startpos = url_ftell(pb); 00152 url_fskip(pb, 14); 00153 rm_read_metadata(s, 0); 00154 if ((startpos + header_size) >= url_ftell(pb) + 2) { 00155 // fourcc (should always be "lpcJ") 00156 get_byte(pb); 00157 get_str8(pb, buf, sizeof(buf)); 00158 } 00159 // Skip extra header crap (this should never happen) 00160 if ((startpos + header_size) > url_ftell(pb)) 00161 url_fskip(pb, header_size + startpos - url_ftell(pb)); 00162 st->codec->sample_rate = 8000; 00163 st->codec->channels = 1; 00164 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 00165 st->codec->codec_id = CODEC_ID_RA_144; 00166 } else { 00167 int flavor, sub_packet_h, coded_framesize, sub_packet_size; 00168 int codecdata_length; 00169 /* old version (4) */ 00170 url_fskip(pb, 2); /* unused */ 00171 get_be32(pb); /* .ra4 */ 00172 get_be32(pb); /* data size */ 00173 get_be16(pb); /* version2 */ 00174 get_be32(pb); /* header size */ 00175 flavor= get_be16(pb); /* add codec info / flavor */ 00176 ast->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */ 00177 get_be32(pb); /* ??? */ 00178 get_be32(pb); /* ??? */ 00179 get_be32(pb); /* ??? */ 00180 ast->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */ 00181 st->codec->block_align= get_be16(pb); /* frame size */ 00182 ast->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */ 00183 get_be16(pb); /* ??? */ 00184 if (version == 5) { 00185 get_be16(pb); get_be16(pb); get_be16(pb); 00186 } 00187 st->codec->sample_rate = get_be16(pb); 00188 get_be32(pb); 00189 st->codec->channels = get_be16(pb); 00190 if (version == 5) { 00191 get_be32(pb); 00192 get_buffer(pb, buf, 4); 00193 buf[4] = 0; 00194 } else { 00195 get_str8(pb, buf, sizeof(buf)); /* desc */ 00196 get_str8(pb, buf, sizeof(buf)); /* desc */ 00197 } 00198 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 00199 st->codec->codec_tag = AV_RL32(buf); 00200 st->codec->codec_id = ff_codec_get_id(rm_codec_tags, st->codec->codec_tag); 00201 switch (st->codec->codec_id) { 00202 case CODEC_ID_AC3: 00203 st->need_parsing = AVSTREAM_PARSE_FULL; 00204 break; 00205 case CODEC_ID_RA_288: 00206 st->codec->extradata_size= 0; 00207 ast->audio_framesize = st->codec->block_align; 00208 st->codec->block_align = coded_framesize; 00209 00210 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){ 00211 av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n"); 00212 return -1; 00213 } 00214 00215 av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h); 00216 break; 00217 case CODEC_ID_COOK: 00218 case CODEC_ID_ATRAC3: 00219 case CODEC_ID_SIPR: 00220 get_be16(pb); get_byte(pb); 00221 if (version == 5) 00222 get_byte(pb); 00223 codecdata_length = get_be32(pb); 00224 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){ 00225 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n"); 00226 return -1; 00227 } 00228 00229 if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK; 00230 else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR; 00231 else st->codec->codec_id = CODEC_ID_ATRAC3; 00232 00233 ast->audio_framesize = st->codec->block_align; 00234 if (st->codec->codec_id == CODEC_ID_SIPR) { 00235 if (flavor > 3) { 00236 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n", 00237 flavor); 00238 return -1; 00239 } 00240 st->codec->block_align = ff_sipr_subpk_size[flavor]; 00241 } else { 00242 if(sub_packet_size <= 0){ 00243 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n"); 00244 return -1; 00245 } 00246 st->codec->block_align = ast->sub_packet_size; 00247 } 00248 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0) 00249 return ret; 00250 00251 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){ 00252 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n"); 00253 return -1; 00254 } 00255 00256 av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h); 00257 break; 00258 case CODEC_ID_AAC: 00259 get_be16(pb); get_byte(pb); 00260 if (version == 5) 00261 get_byte(pb); 00262 st->codec->codec_id = CODEC_ID_AAC; 00263 codecdata_length = get_be32(pb); 00264 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){ 00265 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n"); 00266 return -1; 00267 } 00268 if (codecdata_length >= 1) { 00269 get_byte(pb); 00270 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0) 00271 return ret; 00272 } 00273 break; 00274 default: 00275 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name)); 00276 } 00277 if (read_all) { 00278 get_byte(pb); 00279 get_byte(pb); 00280 get_byte(pb); 00281 rm_read_metadata(s, 0); 00282 } 00283 } 00284 return 0; 00285 } 00286 00287 int 00288 ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb, 00289 AVStream *st, RMStream *rst, int codec_data_size) 00290 { 00291 unsigned int v; 00292 int size; 00293 int64_t codec_pos; 00294 int ret; 00295 00296 av_set_pts_info(st, 64, 1, 1000); 00297 codec_pos = url_ftell(pb); 00298 v = get_be32(pb); 00299 if (v == MKTAG(0xfd, 'a', 'r', '.')) { 00300 /* ra type header */ 00301 if (rm_read_audio_stream_info(s, pb, st, rst, 0)) 00302 return -1; 00303 } else { 00304 int fps, fps2; 00305 if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) { 00306 fail1: 00307 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n"); 00308 goto skip; 00309 } 00310 st->codec->codec_tag = get_le32(pb); 00311 st->codec->codec_id = ff_codec_get_id(rm_codec_tags, st->codec->codec_tag); 00312 // av_log(s, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0')); 00313 if (st->codec->codec_id == CODEC_ID_NONE) 00314 goto fail1; 00315 st->codec->width = get_be16(pb); 00316 st->codec->height = get_be16(pb); 00317 st->codec->time_base.num= 1; 00318 fps= get_be16(pb); 00319 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 00320 get_be32(pb); 00321 fps2= get_be16(pb); 00322 get_be16(pb); 00323 00324 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (url_ftell(pb) - codec_pos))) < 0) 00325 return ret; 00326 00327 // av_log(s, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2); 00328 st->codec->time_base.den = fps * st->codec->time_base.num; 00329 //XXX: do we really need that? 00330 switch(st->codec->extradata[4]>>4){ 00331 case 1: st->codec->codec_id = CODEC_ID_RV10; break; 00332 case 2: st->codec->codec_id = CODEC_ID_RV20; break; 00333 case 3: st->codec->codec_id = CODEC_ID_RV30; break; 00334 case 4: st->codec->codec_id = CODEC_ID_RV40; break; 00335 default: 00336 av_log(st->codec, AV_LOG_ERROR, "extra:%02X %02X %02X %02X %02X\n", st->codec->extradata[0], st->codec->extradata[1], st->codec->extradata[2], st->codec->extradata[3], st->codec->extradata[4]); 00337 goto fail1; 00338 } 00339 } 00340 00341 skip: 00342 /* skip codec info */ 00343 size = url_ftell(pb) - codec_pos; 00344 url_fskip(pb, codec_data_size - size); 00345 00346 return 0; 00347 } 00348 00351 static int rm_read_index(AVFormatContext *s) 00352 { 00353 ByteIOContext *pb = s->pb; 00354 unsigned int size, n_pkts, str_id, next_off, n, pos, pts; 00355 AVStream *st; 00356 00357 do { 00358 if (get_le32(pb) != MKTAG('I','N','D','X')) 00359 return -1; 00360 size = get_be32(pb); 00361 if (size < 20) 00362 return -1; 00363 url_fskip(pb, 2); 00364 n_pkts = get_be32(pb); 00365 str_id = get_be16(pb); 00366 next_off = get_be32(pb); 00367 for (n = 0; n < s->nb_streams; n++) 00368 if (s->streams[n]->id == str_id) { 00369 st = s->streams[n]; 00370 break; 00371 } 00372 if (n == s->nb_streams) 00373 goto skip; 00374 00375 for (n = 0; n < n_pkts; n++) { 00376 url_fskip(pb, 2); 00377 pts = get_be32(pb); 00378 pos = get_be32(pb); 00379 url_fskip(pb, 4); /* packet no. */ 00380 00381 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME); 00382 } 00383 00384 skip: 00385 if (next_off && url_ftell(pb) != next_off && 00386 url_fseek(pb, next_off, SEEK_SET) < 0) 00387 return -1; 00388 } while (next_off); 00389 00390 return 0; 00391 } 00392 00393 static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap) 00394 { 00395 RMDemuxContext *rm = s->priv_data; 00396 AVStream *st; 00397 00398 rm->old_format = 1; 00399 st = av_new_stream(s, 0); 00400 if (!st) 00401 return -1; 00402 st->priv_data = ff_rm_alloc_rmstream(); 00403 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1); 00404 } 00405 00406 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap) 00407 { 00408 RMDemuxContext *rm = s->priv_data; 00409 AVStream *st; 00410 ByteIOContext *pb = s->pb; 00411 unsigned int tag; 00412 int tag_size; 00413 unsigned int start_time, duration; 00414 unsigned int data_off = 0, indx_off = 0; 00415 char buf[128]; 00416 int flags = 0; 00417 00418 tag = get_le32(pb); 00419 if (tag == MKTAG('.', 'r', 'a', 0xfd)) { 00420 /* very old .ra format */ 00421 return rm_read_header_old(s, ap); 00422 } else if (tag != MKTAG('.', 'R', 'M', 'F')) { 00423 return AVERROR(EIO); 00424 } 00425 00426 get_be32(pb); /* header size */ 00427 get_be16(pb); 00428 get_be32(pb); 00429 get_be32(pb); /* number of headers */ 00430 00431 for(;;) { 00432 if (url_feof(pb)) 00433 return -1; 00434 tag = get_le32(pb); 00435 tag_size = get_be32(pb); 00436 get_be16(pb); 00437 #if 0 00438 printf("tag=%c%c%c%c (%08x) size=%d\n", 00439 (tag) & 0xff, 00440 (tag >> 8) & 0xff, 00441 (tag >> 16) & 0xff, 00442 (tag >> 24) & 0xff, 00443 tag, 00444 tag_size); 00445 #endif 00446 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A')) 00447 return -1; 00448 switch(tag) { 00449 case MKTAG('P', 'R', 'O', 'P'): 00450 /* file header */ 00451 get_be32(pb); /* max bit rate */ 00452 get_be32(pb); /* avg bit rate */ 00453 get_be32(pb); /* max packet size */ 00454 get_be32(pb); /* avg packet size */ 00455 get_be32(pb); /* nb packets */ 00456 get_be32(pb); /* duration */ 00457 get_be32(pb); /* preroll */ 00458 indx_off = get_be32(pb); /* index offset */ 00459 data_off = get_be32(pb); /* data offset */ 00460 get_be16(pb); /* nb streams */ 00461 flags = get_be16(pb); /* flags */ 00462 break; 00463 case MKTAG('C', 'O', 'N', 'T'): 00464 rm_read_metadata(s, 1); 00465 break; 00466 case MKTAG('M', 'D', 'P', 'R'): 00467 st = av_new_stream(s, 0); 00468 if (!st) 00469 return AVERROR(ENOMEM); 00470 st->id = get_be16(pb); 00471 get_be32(pb); /* max bit rate */ 00472 st->codec->bit_rate = get_be32(pb); /* bit rate */ 00473 get_be32(pb); /* max packet size */ 00474 get_be32(pb); /* avg packet size */ 00475 start_time = get_be32(pb); /* start time */ 00476 get_be32(pb); /* preroll */ 00477 duration = get_be32(pb); /* duration */ 00478 st->start_time = start_time; 00479 st->duration = duration; 00480 get_str8(pb, buf, sizeof(buf)); /* desc */ 00481 get_str8(pb, buf, sizeof(buf)); /* mimetype */ 00482 st->codec->codec_type = AVMEDIA_TYPE_DATA; 00483 st->priv_data = ff_rm_alloc_rmstream(); 00484 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data, 00485 get_be32(pb)) < 0) 00486 return -1; 00487 break; 00488 case MKTAG('D', 'A', 'T', 'A'): 00489 goto header_end; 00490 default: 00491 /* unknown tag: skip it */ 00492 url_fskip(pb, tag_size - 10); 00493 break; 00494 } 00495 } 00496 header_end: 00497 rm->nb_packets = get_be32(pb); /* number of packets */ 00498 if (!rm->nb_packets && (flags & 4)) 00499 rm->nb_packets = 3600 * 25; 00500 get_be32(pb); /* next data header */ 00501 00502 if (!data_off) 00503 data_off = url_ftell(pb) - 18; 00504 if (indx_off && url_fseek(pb, indx_off, SEEK_SET) >= 0) { 00505 rm_read_index(s); 00506 url_fseek(pb, data_off + 18, SEEK_SET); 00507 } 00508 00509 return 0; 00510 } 00511 00512 static int get_num(ByteIOContext *pb, int *len) 00513 { 00514 int n, n1; 00515 00516 n = get_be16(pb); 00517 (*len)-=2; 00518 n &= 0x7FFF; 00519 if (n >= 0x4000) { 00520 return n - 0x4000; 00521 } else { 00522 n1 = get_be16(pb); 00523 (*len)-=2; 00524 return (n << 16) | n1; 00525 } 00526 } 00527 00528 /* multiple of 20 bytes for ra144 (ugly) */ 00529 #define RAW_PACKET_SIZE 1000 00530 00531 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){ 00532 RMDemuxContext *rm = s->priv_data; 00533 ByteIOContext *pb = s->pb; 00534 AVStream *st; 00535 uint32_t state=0xFFFFFFFF; 00536 00537 while(!url_feof(pb)){ 00538 int len, num, i; 00539 *pos= url_ftell(pb) - 3; 00540 if(rm->remaining_len > 0){ 00541 num= rm->current_stream; 00542 len= rm->remaining_len; 00543 *timestamp = AV_NOPTS_VALUE; 00544 *flags= 0; 00545 }else{ 00546 state= (state<<8) + get_byte(pb); 00547 00548 if(state == MKBETAG('I', 'N', 'D', 'X')){ 00549 int n_pkts, expected_len; 00550 len = get_be32(pb); 00551 url_fskip(pb, 2); 00552 n_pkts = get_be32(pb); 00553 expected_len = 20 + n_pkts * 14; 00554 if (len == 20) 00555 /* some files don't add index entries to chunk size... */ 00556 len = expected_len; 00557 else if (len != expected_len) 00558 av_log(s, AV_LOG_WARNING, 00559 "Index size %d (%d pkts) is wrong, should be %d.\n", 00560 len, n_pkts, expected_len); 00561 len -= 14; // we already read part of the index header 00562 if(len<0) 00563 continue; 00564 goto skip; 00565 } else if (state == MKBETAG('D','A','T','A')) { 00566 av_log(s, AV_LOG_WARNING, 00567 "DATA tag in middle of chunk, file may be broken.\n"); 00568 } 00569 00570 if(state > (unsigned)0xFFFF || state <= 12) 00571 continue; 00572 len=state - 12; 00573 state= 0xFFFFFFFF; 00574 00575 num = get_be16(pb); 00576 *timestamp = get_be32(pb); 00577 get_byte(pb); /* reserved */ 00578 *flags = get_byte(pb); /* flags */ 00579 } 00580 for(i=0;i<s->nb_streams;i++) { 00581 st = s->streams[i]; 00582 if (num == st->id) 00583 break; 00584 } 00585 if (i == s->nb_streams) { 00586 skip: 00587 /* skip packet if unknown number */ 00588 url_fskip(pb, len); 00589 rm->remaining_len = 0; 00590 continue; 00591 } 00592 *stream_index= i; 00593 00594 return len; 00595 } 00596 return -1; 00597 } 00598 00599 static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb, 00600 RMDemuxContext *rm, RMStream *vst, 00601 AVPacket *pkt, int len, int *pseq) 00602 { 00603 int hdr, seq, pic_num, len2, pos; 00604 int type; 00605 00606 hdr = get_byte(pb); len--; 00607 type = hdr >> 6; 00608 00609 if(type != 3){ // not frame as a part of packet 00610 seq = get_byte(pb); len--; 00611 } 00612 if(type != 1){ // not whole frame 00613 len2 = get_num(pb, &len); 00614 pos = get_num(pb, &len); 00615 pic_num = get_byte(pb); len--; 00616 } 00617 if(len<0) 00618 return -1; 00619 rm->remaining_len = len; 00620 if(type&1){ // frame, not slice 00621 if(type == 3) // frame as a part of packet 00622 len= len2; 00623 if(rm->remaining_len < len) 00624 return -1; 00625 rm->remaining_len -= len; 00626 if(av_new_packet(pkt, len + 9) < 0) 00627 return AVERROR(EIO); 00628 pkt->data[0] = 0; 00629 AV_WL32(pkt->data + 1, 1); 00630 AV_WL32(pkt->data + 5, 0); 00631 get_buffer(pb, pkt->data + 9, len); 00632 return 0; 00633 } 00634 //now we have to deal with single slice 00635 00636 *pseq = seq; 00637 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){ 00638 vst->slices = ((hdr & 0x3F) << 1) + 1; 00639 vst->videobufsize = len2 + 8*vst->slices + 1; 00640 av_free_packet(&vst->pkt); //FIXME this should be output. 00641 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0) 00642 return AVERROR(ENOMEM); 00643 vst->videobufpos = 8*vst->slices + 1; 00644 vst->cur_slice = 0; 00645 vst->curpic_num = pic_num; 00646 vst->pktpos = url_ftell(pb); 00647 } 00648 if(type == 2) 00649 len = FFMIN(len, pos); 00650 00651 if(++vst->cur_slice > vst->slices) 00652 return 1; 00653 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1); 00654 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1); 00655 if(vst->videobufpos + len > vst->videobufsize) 00656 return 1; 00657 if (get_buffer(pb, vst->pkt.data + vst->videobufpos, len) != len) 00658 return AVERROR(EIO); 00659 vst->videobufpos += len; 00660 rm->remaining_len-= len; 00661 00662 if(type == 2 || (vst->videobufpos) == vst->videobufsize){ 00663 vst->pkt.data[0] = vst->cur_slice-1; 00664 *pkt= vst->pkt; 00665 vst->pkt.data= NULL; 00666 vst->pkt.size= 0; 00667 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin 00668 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices, 00669 vst->videobufpos - 1 - 8*vst->slices); 00670 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices); 00671 pkt->pts = AV_NOPTS_VALUE; 00672 pkt->pos = vst->pktpos; 00673 vst->slices = 0; 00674 return 0; 00675 } 00676 00677 return 1; 00678 } 00679 00680 static inline void 00681 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt) 00682 { 00683 uint8_t *ptr; 00684 int j; 00685 00686 if (st->codec->codec_id == CODEC_ID_AC3) { 00687 ptr = pkt->data; 00688 for (j=0;j<pkt->size;j+=2) { 00689 FFSWAP(int, ptr[0], ptr[1]); 00690 ptr += 2; 00691 } 00692 } 00693 } 00694 00699 void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize) 00700 { 00701 int n, bs = sub_packet_h * framesize * 2 / 96; // nibbles per subpacket 00702 00703 for (n = 0; n < 38; n++) { 00704 int j; 00705 int i = bs * sipr_swaps[n][0]; 00706 int o = bs * sipr_swaps[n][1]; 00707 00708 /* swap 4bit-nibbles of block 'i' with 'o' */ 00709 for (j = 0; j < bs; j++, i++, o++) { 00710 int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF, 00711 y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF; 00712 00713 buf[o >> 1] = (x << (4 * (o & 1))) | 00714 (buf[o >> 1] & (0xF << (4 * !(o & 1)))); 00715 buf[i >> 1] = (y << (4 * (i & 1))) | 00716 (buf[i >> 1] & (0xF << (4 * !(i & 1)))); 00717 } 00718 } 00719 } 00720 00721 int 00722 ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb, 00723 AVStream *st, RMStream *ast, int len, AVPacket *pkt, 00724 int *seq, int flags, int64_t timestamp) 00725 { 00726 RMDemuxContext *rm = s->priv_data; 00727 00728 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 00729 rm->current_stream= st->id; 00730 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq)) 00731 return -1; //got partial frame 00732 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { 00733 if ((st->codec->codec_id == CODEC_ID_RA_288) || 00734 (st->codec->codec_id == CODEC_ID_COOK) || 00735 (st->codec->codec_id == CODEC_ID_ATRAC3) || 00736 (st->codec->codec_id == CODEC_ID_SIPR)) { 00737 int x; 00738 int sps = ast->sub_packet_size; 00739 int cfs = ast->coded_framesize; 00740 int h = ast->sub_packet_h; 00741 int y = ast->sub_packet_cnt; 00742 int w = ast->audio_framesize; 00743 00744 if (flags & 2) 00745 y = ast->sub_packet_cnt = 0; 00746 if (!y) 00747 ast->audiotimestamp = timestamp; 00748 00749 switch(st->codec->codec_id) { 00750 case CODEC_ID_RA_288: 00751 for (x = 0; x < h/2; x++) 00752 get_buffer(pb, ast->pkt.data+x*2*w+y*cfs, cfs); 00753 break; 00754 case CODEC_ID_ATRAC3: 00755 case CODEC_ID_COOK: 00756 for (x = 0; x < w/sps; x++) 00757 get_buffer(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps); 00758 break; 00759 case CODEC_ID_SIPR: 00760 get_buffer(pb, ast->pkt.data + y * w, w); 00761 break; 00762 } 00763 00764 if (++(ast->sub_packet_cnt) < h) 00765 return -1; 00766 if (st->codec->codec_id == CODEC_ID_SIPR) 00767 ff_rm_reorder_sipr_data(ast->pkt.data, h, w); 00768 00769 ast->sub_packet_cnt = 0; 00770 rm->audio_stream_num = st->index; 00771 rm->audio_pkt_cnt = h * w / st->codec->block_align; 00772 } else if (st->codec->codec_id == CODEC_ID_AAC) { 00773 int x; 00774 rm->audio_stream_num = st->index; 00775 ast->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4; 00776 if (ast->sub_packet_cnt) { 00777 for (x = 0; x < ast->sub_packet_cnt; x++) 00778 ast->sub_packet_lengths[x] = get_be16(pb); 00779 rm->audio_pkt_cnt = ast->sub_packet_cnt; 00780 ast->audiotimestamp = timestamp; 00781 } else 00782 return -1; 00783 } else { 00784 av_get_packet(pb, pkt, len); 00785 rm_ac3_swap_bytes(st, pkt); 00786 } 00787 } else 00788 av_get_packet(pb, pkt, len); 00789 00790 pkt->stream_index = st->index; 00791 00792 #if 0 00793 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 00794 if(st->codec->codec_id == CODEC_ID_RV20){ 00795 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1); 00796 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq); 00797 00798 seq |= (timestamp&~0x3FFF); 00799 if(seq - timestamp > 0x2000) seq -= 0x4000; 00800 if(seq - timestamp < -0x2000) seq += 0x4000; 00801 } 00802 } 00803 #endif 00804 00805 pkt->pts= timestamp; 00806 if (flags & 2) 00807 pkt->flags |= AV_PKT_FLAG_KEY; 00808 00809 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0; 00810 } 00811 00812 int 00813 ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb, 00814 AVStream *st, RMStream *ast, AVPacket *pkt) 00815 { 00816 RMDemuxContext *rm = s->priv_data; 00817 00818 assert (rm->audio_pkt_cnt > 0); 00819 00820 if (st->codec->codec_id == CODEC_ID_AAC) 00821 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]); 00822 else { 00823 av_new_packet(pkt, st->codec->block_align); 00824 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this 00825 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt), 00826 st->codec->block_align); 00827 } 00828 rm->audio_pkt_cnt--; 00829 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) { 00830 ast->audiotimestamp = AV_NOPTS_VALUE; 00831 pkt->flags = AV_PKT_FLAG_KEY; 00832 } else 00833 pkt->flags = 0; 00834 pkt->stream_index = st->index; 00835 00836 return rm->audio_pkt_cnt; 00837 } 00838 00839 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt) 00840 { 00841 RMDemuxContext *rm = s->priv_data; 00842 AVStream *st; 00843 int i, len, res, seq = 1; 00844 int64_t timestamp, pos; 00845 int flags; 00846 00847 for (;;) { 00848 if (rm->audio_pkt_cnt) { 00849 // If there are queued audio packet return them first 00850 st = s->streams[rm->audio_stream_num]; 00851 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt); 00852 flags = 0; 00853 } else { 00854 if (rm->old_format) { 00855 RMStream *ast; 00856 00857 st = s->streams[0]; 00858 ast = st->priv_data; 00859 timestamp = AV_NOPTS_VALUE; 00860 len = !ast->audio_framesize ? RAW_PACKET_SIZE : 00861 ast->coded_framesize * ast->sub_packet_h / 2; 00862 flags = (seq++ == 1) ? 2 : 0; 00863 pos = url_ftell(s->pb); 00864 } else { 00865 len=sync(s, ×tamp, &flags, &i, &pos); 00866 if (len > 0) 00867 st = s->streams[i]; 00868 } 00869 00870 if(len<0 || url_feof(s->pb)) 00871 return AVERROR(EIO); 00872 00873 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt, 00874 &seq, flags, timestamp); 00875 if((flags&2) && (seq&0x7F) == 1) 00876 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME); 00877 if (res) 00878 continue; 00879 } 00880 00881 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2)) 00882 || st->discard >= AVDISCARD_ALL){ 00883 av_free_packet(pkt); 00884 } else 00885 break; 00886 } 00887 00888 return 0; 00889 } 00890 00891 static int rm_read_close(AVFormatContext *s) 00892 { 00893 int i; 00894 00895 for (i=0;i<s->nb_streams;i++) 00896 ff_rm_free_rmstream(s->streams[i]->priv_data); 00897 00898 return 0; 00899 } 00900 00901 static int rm_probe(AVProbeData *p) 00902 { 00903 /* check file header */ 00904 if ((p->buf[0] == '.' && p->buf[1] == 'R' && 00905 p->buf[2] == 'M' && p->buf[3] == 'F' && 00906 p->buf[4] == 0 && p->buf[5] == 0) || 00907 (p->buf[0] == '.' && p->buf[1] == 'r' && 00908 p->buf[2] == 'a' && p->buf[3] == 0xfd)) 00909 return AVPROBE_SCORE_MAX; 00910 else 00911 return 0; 00912 } 00913 00914 static int64_t rm_read_dts(AVFormatContext *s, int stream_index, 00915 int64_t *ppos, int64_t pos_limit) 00916 { 00917 RMDemuxContext *rm = s->priv_data; 00918 int64_t pos, dts; 00919 int stream_index2, flags, len, h; 00920 00921 pos = *ppos; 00922 00923 if(rm->old_format) 00924 return AV_NOPTS_VALUE; 00925 00926 url_fseek(s->pb, pos, SEEK_SET); 00927 rm->remaining_len=0; 00928 for(;;){ 00929 int seq=1; 00930 AVStream *st; 00931 00932 len=sync(s, &dts, &flags, &stream_index2, &pos); 00933 if(len<0) 00934 return AV_NOPTS_VALUE; 00935 00936 st = s->streams[stream_index2]; 00937 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 00938 h= get_byte(s->pb); len--; 00939 if(!(h & 0x40)){ 00940 seq = get_byte(s->pb); len--; 00941 } 00942 } 00943 00944 if((flags&2) && (seq&0x7F) == 1){ 00945 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq); 00946 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME); 00947 if(stream_index2 == stream_index) 00948 break; 00949 } 00950 00951 url_fskip(s->pb, len); 00952 } 00953 *ppos = pos; 00954 return dts; 00955 } 00956 00957 AVInputFormat rm_demuxer = { 00958 "rm", 00959 NULL_IF_CONFIG_SMALL("RealMedia format"), 00960 sizeof(RMDemuxContext), 00961 rm_probe, 00962 rm_read_header, 00963 rm_read_packet, 00964 rm_read_close, 00965 NULL, 00966 rm_read_dts, 00967 }; 00968 00969 AVInputFormat rdt_demuxer = { 00970 "rdt", 00971 NULL_IF_CONFIG_SMALL("RDT demuxer"), 00972 sizeof(RMDemuxContext), 00973 NULL, 00974 NULL, 00975 NULL, 00976 rm_read_close, 00977 };