Libav 0.7.1
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00001 /* 00002 * "Real" compatible demuxer. 00003 * Copyright (c) 2000, 2001 Fabrice Bellard 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav 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 * Libav 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 Libav; 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 "libavutil/dict.h" 00025 #include "avformat.h" 00026 #include "riff.h" 00027 #include "rm.h" 00028 00029 struct RMStream { 00030 AVPacket pkt; 00031 int videobufsize; 00032 int videobufpos; 00033 int curpic_num; 00034 int cur_slice, slices; 00035 int64_t pktpos; 00036 00037 int64_t audiotimestamp; 00038 int sub_packet_cnt; // Subpacket counter, used while reading 00039 int sub_packet_size, sub_packet_h, coded_framesize; 00040 int audio_framesize; 00041 int sub_packet_lengths[16]; 00042 }; 00043 00044 typedef struct { 00045 int nb_packets; 00046 int old_format; 00047 int current_stream; 00048 int remaining_len; 00049 int audio_stream_num; 00050 int audio_pkt_cnt; 00051 } RMDemuxContext; 00052 00053 static const unsigned char sipr_swaps[38][2] = { 00054 { 0, 63 }, { 1, 22 }, { 2, 44 }, { 3, 90 }, 00055 { 5, 81 }, { 7, 31 }, { 8, 86 }, { 9, 58 }, 00056 { 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 }, 00057 { 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 }, 00058 { 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 }, 00059 { 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 }, 00060 { 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 }, 00061 { 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 }, 00062 { 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 }, 00063 { 67, 83 }, { 77, 80 } 00064 }; 00065 00066 const unsigned char ff_sipr_subpk_size[4] = { 29, 19, 37, 20 }; 00067 00068 static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len) 00069 { 00070 int i; 00071 char *q, r; 00072 00073 q = buf; 00074 for(i=0;i<len;i++) { 00075 r = avio_r8(pb); 00076 if (i < buf_size - 1) 00077 *q++ = r; 00078 } 00079 if (buf_size > 0) *q = '\0'; 00080 } 00081 00082 static void get_str8(AVIOContext *pb, char *buf, int buf_size) 00083 { 00084 get_strl(pb, buf, buf_size, avio_r8(pb)); 00085 } 00086 00087 static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size) 00088 { 00089 if (size >= 1<<24) 00090 return -1; 00091 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); 00092 if (!avctx->extradata) 00093 return AVERROR(ENOMEM); 00094 avctx->extradata_size = avio_read(pb, avctx->extradata, size); 00095 memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); 00096 if (avctx->extradata_size != size) 00097 return AVERROR(EIO); 00098 return 0; 00099 } 00100 00101 static void rm_read_metadata(AVFormatContext *s, int wide) 00102 { 00103 char buf[1024]; 00104 int i; 00105 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) { 00106 int len = wide ? avio_rb16(s->pb) : avio_r8(s->pb); 00107 get_strl(s->pb, buf, sizeof(buf), len); 00108 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0); 00109 } 00110 } 00111 00112 RMStream *ff_rm_alloc_rmstream (void) 00113 { 00114 RMStream *rms = av_mallocz(sizeof(RMStream)); 00115 rms->curpic_num = -1; 00116 return rms; 00117 } 00118 00119 void ff_rm_free_rmstream (RMStream *rms) 00120 { 00121 av_free_packet(&rms->pkt); 00122 } 00123 00124 static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb, 00125 AVStream *st, RMStream *ast, int read_all) 00126 { 00127 char buf[256]; 00128 uint32_t version; 00129 int ret; 00130 00131 /* ra type header */ 00132 version = avio_rb16(pb); /* version */ 00133 if (version == 3) { 00134 int header_size = avio_rb16(pb); 00135 int64_t startpos = avio_tell(pb); 00136 avio_skip(pb, 14); 00137 rm_read_metadata(s, 0); 00138 if ((startpos + header_size) >= avio_tell(pb) + 2) { 00139 // fourcc (should always be "lpcJ") 00140 avio_r8(pb); 00141 get_str8(pb, buf, sizeof(buf)); 00142 } 00143 // Skip extra header crap (this should never happen) 00144 if ((startpos + header_size) > avio_tell(pb)) 00145 avio_skip(pb, header_size + startpos - avio_tell(pb)); 00146 st->codec->sample_rate = 8000; 00147 st->codec->channels = 1; 00148 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 00149 st->codec->codec_id = CODEC_ID_RA_144; 00150 } else { 00151 int flavor, sub_packet_h, coded_framesize, sub_packet_size; 00152 int codecdata_length; 00153 /* old version (4) */ 00154 avio_skip(pb, 2); /* unused */ 00155 avio_rb32(pb); /* .ra4 */ 00156 avio_rb32(pb); /* data size */ 00157 avio_rb16(pb); /* version2 */ 00158 avio_rb32(pb); /* header size */ 00159 flavor= avio_rb16(pb); /* add codec info / flavor */ 00160 ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */ 00161 avio_rb32(pb); /* ??? */ 00162 avio_rb32(pb); /* ??? */ 00163 avio_rb32(pb); /* ??? */ 00164 ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */ 00165 st->codec->block_align= avio_rb16(pb); /* frame size */ 00166 ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */ 00167 avio_rb16(pb); /* ??? */ 00168 if (version == 5) { 00169 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb); 00170 } 00171 st->codec->sample_rate = avio_rb16(pb); 00172 avio_rb32(pb); 00173 st->codec->channels = avio_rb16(pb); 00174 if (version == 5) { 00175 avio_rb32(pb); 00176 avio_read(pb, buf, 4); 00177 buf[4] = 0; 00178 } else { 00179 get_str8(pb, buf, sizeof(buf)); /* desc */ 00180 get_str8(pb, buf, sizeof(buf)); /* desc */ 00181 } 00182 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 00183 st->codec->codec_tag = AV_RL32(buf); 00184 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags, 00185 st->codec->codec_tag); 00186 switch (st->codec->codec_id) { 00187 case CODEC_ID_AC3: 00188 st->need_parsing = AVSTREAM_PARSE_FULL; 00189 break; 00190 case CODEC_ID_RA_288: 00191 st->codec->extradata_size= 0; 00192 ast->audio_framesize = st->codec->block_align; 00193 st->codec->block_align = coded_framesize; 00194 00195 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){ 00196 av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n"); 00197 return -1; 00198 } 00199 00200 av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h); 00201 break; 00202 case CODEC_ID_COOK: 00203 case CODEC_ID_ATRAC3: 00204 case CODEC_ID_SIPR: 00205 avio_rb16(pb); avio_r8(pb); 00206 if (version == 5) 00207 avio_r8(pb); 00208 codecdata_length = avio_rb32(pb); 00209 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){ 00210 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n"); 00211 return -1; 00212 } 00213 00214 ast->audio_framesize = st->codec->block_align; 00215 if (st->codec->codec_id == CODEC_ID_SIPR) { 00216 if (flavor > 3) { 00217 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n", 00218 flavor); 00219 return -1; 00220 } 00221 st->codec->block_align = ff_sipr_subpk_size[flavor]; 00222 } else { 00223 if(sub_packet_size <= 0){ 00224 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n"); 00225 return -1; 00226 } 00227 st->codec->block_align = ast->sub_packet_size; 00228 } 00229 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0) 00230 return ret; 00231 00232 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){ 00233 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n"); 00234 return -1; 00235 } 00236 00237 av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h); 00238 break; 00239 case CODEC_ID_AAC: 00240 avio_rb16(pb); avio_r8(pb); 00241 if (version == 5) 00242 avio_r8(pb); 00243 codecdata_length = avio_rb32(pb); 00244 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){ 00245 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n"); 00246 return -1; 00247 } 00248 if (codecdata_length >= 1) { 00249 avio_r8(pb); 00250 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0) 00251 return ret; 00252 } 00253 break; 00254 default: 00255 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name)); 00256 } 00257 if (read_all) { 00258 avio_r8(pb); 00259 avio_r8(pb); 00260 avio_r8(pb); 00261 rm_read_metadata(s, 0); 00262 } 00263 } 00264 return 0; 00265 } 00266 00267 int 00268 ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb, 00269 AVStream *st, RMStream *rst, int codec_data_size) 00270 { 00271 unsigned int v; 00272 int size; 00273 int64_t codec_pos; 00274 int ret; 00275 00276 av_set_pts_info(st, 64, 1, 1000); 00277 codec_pos = avio_tell(pb); 00278 v = avio_rb32(pb); 00279 if (v == MKTAG(0xfd, 'a', 'r', '.')) { 00280 /* ra type header */ 00281 if (rm_read_audio_stream_info(s, pb, st, rst, 0)) 00282 return -1; 00283 } else { 00284 int fps; 00285 if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) { 00286 fail1: 00287 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n"); 00288 goto skip; 00289 } 00290 st->codec->codec_tag = avio_rl32(pb); 00291 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags, 00292 st->codec->codec_tag); 00293 // av_log(s, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0')); 00294 if (st->codec->codec_id == CODEC_ID_NONE) 00295 goto fail1; 00296 st->codec->width = avio_rb16(pb); 00297 st->codec->height = avio_rb16(pb); 00298 st->codec->time_base.num= 1; 00299 fps= avio_rb16(pb); 00300 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 00301 avio_rb32(pb); 00302 avio_skip(pb, 2); 00303 avio_rb16(pb); 00304 00305 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0) 00306 return ret; 00307 00308 // av_log(s, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2); 00309 st->codec->time_base.den = fps * st->codec->time_base.num; 00310 //XXX: do we really need that? 00311 switch(st->codec->extradata[4]>>4){ 00312 case 1: st->codec->codec_id = CODEC_ID_RV10; break; 00313 case 2: st->codec->codec_id = CODEC_ID_RV20; break; 00314 case 3: st->codec->codec_id = CODEC_ID_RV30; break; 00315 case 4: st->codec->codec_id = CODEC_ID_RV40; break; 00316 default: 00317 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]); 00318 goto fail1; 00319 } 00320 } 00321 00322 skip: 00323 /* skip codec info */ 00324 size = avio_tell(pb) - codec_pos; 00325 avio_skip(pb, codec_data_size - size); 00326 00327 return 0; 00328 } 00329 00332 static int rm_read_index(AVFormatContext *s) 00333 { 00334 AVIOContext *pb = s->pb; 00335 unsigned int size, n_pkts, str_id, next_off, n, pos, pts; 00336 AVStream *st; 00337 00338 do { 00339 if (avio_rl32(pb) != MKTAG('I','N','D','X')) 00340 return -1; 00341 size = avio_rb32(pb); 00342 if (size < 20) 00343 return -1; 00344 avio_skip(pb, 2); 00345 n_pkts = avio_rb32(pb); 00346 str_id = avio_rb16(pb); 00347 next_off = avio_rb32(pb); 00348 for (n = 0; n < s->nb_streams; n++) 00349 if (s->streams[n]->id == str_id) { 00350 st = s->streams[n]; 00351 break; 00352 } 00353 if (n == s->nb_streams) { 00354 av_log(s, AV_LOG_ERROR, 00355 "Invalid stream index %d for index at pos %"PRId64"\n", 00356 str_id, avio_tell(pb)); 00357 goto skip; 00358 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) { 00359 av_log(s, AV_LOG_ERROR, 00360 "Nr. of packets in packet index for stream index %d " 00361 "exceeds filesize (%"PRId64" at %"PRId64" = %d)\n", 00362 str_id, avio_size(pb), avio_tell(pb), 00363 (avio_size(pb) - avio_tell(pb)) / 14); 00364 goto skip; 00365 } 00366 00367 for (n = 0; n < n_pkts; n++) { 00368 avio_skip(pb, 2); 00369 pts = avio_rb32(pb); 00370 pos = avio_rb32(pb); 00371 avio_skip(pb, 4); /* packet no. */ 00372 00373 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME); 00374 } 00375 00376 skip: 00377 if (next_off && avio_tell(pb) < next_off && 00378 avio_seek(pb, next_off, SEEK_SET) < 0) { 00379 av_log(s, AV_LOG_ERROR, 00380 "Non-linear index detected, not supported\n"); 00381 return -1; 00382 } 00383 } while (next_off); 00384 00385 return 0; 00386 } 00387 00388 static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap) 00389 { 00390 RMDemuxContext *rm = s->priv_data; 00391 AVStream *st; 00392 00393 rm->old_format = 1; 00394 st = av_new_stream(s, 0); 00395 if (!st) 00396 return -1; 00397 st->priv_data = ff_rm_alloc_rmstream(); 00398 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1); 00399 } 00400 00401 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap) 00402 { 00403 RMDemuxContext *rm = s->priv_data; 00404 AVStream *st; 00405 AVIOContext *pb = s->pb; 00406 unsigned int tag; 00407 int tag_size; 00408 unsigned int start_time, duration; 00409 unsigned int data_off = 0, indx_off = 0; 00410 char buf[128]; 00411 int flags = 0; 00412 00413 tag = avio_rl32(pb); 00414 if (tag == MKTAG('.', 'r', 'a', 0xfd)) { 00415 /* very old .ra format */ 00416 return rm_read_header_old(s, ap); 00417 } else if (tag != MKTAG('.', 'R', 'M', 'F')) { 00418 return AVERROR(EIO); 00419 } 00420 00421 avio_rb32(pb); /* header size */ 00422 avio_rb16(pb); 00423 avio_rb32(pb); 00424 avio_rb32(pb); /* number of headers */ 00425 00426 for(;;) { 00427 if (pb->eof_reached) 00428 return -1; 00429 tag = avio_rl32(pb); 00430 tag_size = avio_rb32(pb); 00431 avio_rb16(pb); 00432 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n", 00433 (tag ) & 0xff, 00434 (tag >> 8) & 0xff, 00435 (tag >> 16) & 0xff, 00436 (tag >> 24) & 0xff, 00437 tag, 00438 tag_size); 00439 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A')) 00440 return -1; 00441 switch(tag) { 00442 case MKTAG('P', 'R', 'O', 'P'): 00443 /* file header */ 00444 avio_rb32(pb); /* max bit rate */ 00445 avio_rb32(pb); /* avg bit rate */ 00446 avio_rb32(pb); /* max packet size */ 00447 avio_rb32(pb); /* avg packet size */ 00448 avio_rb32(pb); /* nb packets */ 00449 avio_rb32(pb); /* duration */ 00450 avio_rb32(pb); /* preroll */ 00451 indx_off = avio_rb32(pb); /* index offset */ 00452 data_off = avio_rb32(pb); /* data offset */ 00453 avio_rb16(pb); /* nb streams */ 00454 flags = avio_rb16(pb); /* flags */ 00455 break; 00456 case MKTAG('C', 'O', 'N', 'T'): 00457 rm_read_metadata(s, 1); 00458 break; 00459 case MKTAG('M', 'D', 'P', 'R'): 00460 st = av_new_stream(s, 0); 00461 if (!st) 00462 return AVERROR(ENOMEM); 00463 st->id = avio_rb16(pb); 00464 avio_rb32(pb); /* max bit rate */ 00465 st->codec->bit_rate = avio_rb32(pb); /* bit rate */ 00466 avio_rb32(pb); /* max packet size */ 00467 avio_rb32(pb); /* avg packet size */ 00468 start_time = avio_rb32(pb); /* start time */ 00469 avio_rb32(pb); /* preroll */ 00470 duration = avio_rb32(pb); /* duration */ 00471 st->start_time = start_time; 00472 st->duration = duration; 00473 get_str8(pb, buf, sizeof(buf)); /* desc */ 00474 get_str8(pb, buf, sizeof(buf)); /* mimetype */ 00475 st->codec->codec_type = AVMEDIA_TYPE_DATA; 00476 st->priv_data = ff_rm_alloc_rmstream(); 00477 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data, 00478 avio_rb32(pb)) < 0) 00479 return -1; 00480 break; 00481 case MKTAG('D', 'A', 'T', 'A'): 00482 goto header_end; 00483 default: 00484 /* unknown tag: skip it */ 00485 avio_skip(pb, tag_size - 10); 00486 break; 00487 } 00488 } 00489 header_end: 00490 rm->nb_packets = avio_rb32(pb); /* number of packets */ 00491 if (!rm->nb_packets && (flags & 4)) 00492 rm->nb_packets = 3600 * 25; 00493 avio_rb32(pb); /* next data header */ 00494 00495 if (!data_off) 00496 data_off = avio_tell(pb) - 18; 00497 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) && 00498 avio_seek(pb, indx_off, SEEK_SET) >= 0) { 00499 rm_read_index(s); 00500 avio_seek(pb, data_off + 18, SEEK_SET); 00501 } 00502 00503 return 0; 00504 } 00505 00506 static int get_num(AVIOContext *pb, int *len) 00507 { 00508 int n, n1; 00509 00510 n = avio_rb16(pb); 00511 (*len)-=2; 00512 n &= 0x7FFF; 00513 if (n >= 0x4000) { 00514 return n - 0x4000; 00515 } else { 00516 n1 = avio_rb16(pb); 00517 (*len)-=2; 00518 return (n << 16) | n1; 00519 } 00520 } 00521 00522 /* multiple of 20 bytes for ra144 (ugly) */ 00523 #define RAW_PACKET_SIZE 1000 00524 00525 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){ 00526 RMDemuxContext *rm = s->priv_data; 00527 AVIOContext *pb = s->pb; 00528 AVStream *st; 00529 uint32_t state=0xFFFFFFFF; 00530 00531 while(!pb->eof_reached){ 00532 int len, num, i; 00533 *pos= avio_tell(pb) - 3; 00534 if(rm->remaining_len > 0){ 00535 num= rm->current_stream; 00536 len= rm->remaining_len; 00537 *timestamp = AV_NOPTS_VALUE; 00538 *flags= 0; 00539 }else{ 00540 state= (state<<8) + avio_r8(pb); 00541 00542 if(state == MKBETAG('I', 'N', 'D', 'X')){ 00543 int n_pkts, expected_len; 00544 len = avio_rb32(pb); 00545 avio_skip(pb, 2); 00546 n_pkts = avio_rb32(pb); 00547 expected_len = 20 + n_pkts * 14; 00548 if (len == 20) 00549 /* some files don't add index entries to chunk size... */ 00550 len = expected_len; 00551 else if (len != expected_len) 00552 av_log(s, AV_LOG_WARNING, 00553 "Index size %d (%d pkts) is wrong, should be %d.\n", 00554 len, n_pkts, expected_len); 00555 len -= 14; // we already read part of the index header 00556 if(len<0) 00557 continue; 00558 goto skip; 00559 } else if (state == MKBETAG('D','A','T','A')) { 00560 av_log(s, AV_LOG_WARNING, 00561 "DATA tag in middle of chunk, file may be broken.\n"); 00562 } 00563 00564 if(state > (unsigned)0xFFFF || state <= 12) 00565 continue; 00566 len=state - 12; 00567 state= 0xFFFFFFFF; 00568 00569 num = avio_rb16(pb); 00570 *timestamp = avio_rb32(pb); 00571 avio_r8(pb); /* reserved */ 00572 *flags = avio_r8(pb); /* flags */ 00573 } 00574 for(i=0;i<s->nb_streams;i++) { 00575 st = s->streams[i]; 00576 if (num == st->id) 00577 break; 00578 } 00579 if (i == s->nb_streams) { 00580 skip: 00581 /* skip packet if unknown number */ 00582 avio_skip(pb, len); 00583 rm->remaining_len = 0; 00584 continue; 00585 } 00586 *stream_index= i; 00587 00588 return len; 00589 } 00590 return -1; 00591 } 00592 00593 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb, 00594 RMDemuxContext *rm, RMStream *vst, 00595 AVPacket *pkt, int len, int *pseq) 00596 { 00597 int hdr, seq, pic_num, len2, pos; 00598 int type; 00599 00600 hdr = avio_r8(pb); len--; 00601 type = hdr >> 6; 00602 00603 if(type != 3){ // not frame as a part of packet 00604 seq = avio_r8(pb); len--; 00605 } 00606 if(type != 1){ // not whole frame 00607 len2 = get_num(pb, &len); 00608 pos = get_num(pb, &len); 00609 pic_num = avio_r8(pb); len--; 00610 } 00611 if(len<0) 00612 return -1; 00613 rm->remaining_len = len; 00614 if(type&1){ // frame, not slice 00615 if(type == 3) // frame as a part of packet 00616 len= len2; 00617 if(rm->remaining_len < len) 00618 return -1; 00619 rm->remaining_len -= len; 00620 if(av_new_packet(pkt, len + 9) < 0) 00621 return AVERROR(EIO); 00622 pkt->data[0] = 0; 00623 AV_WL32(pkt->data + 1, 1); 00624 AV_WL32(pkt->data + 5, 0); 00625 avio_read(pb, pkt->data + 9, len); 00626 return 0; 00627 } 00628 //now we have to deal with single slice 00629 00630 *pseq = seq; 00631 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){ 00632 vst->slices = ((hdr & 0x3F) << 1) + 1; 00633 vst->videobufsize = len2 + 8*vst->slices + 1; 00634 av_free_packet(&vst->pkt); //FIXME this should be output. 00635 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0) 00636 return AVERROR(ENOMEM); 00637 vst->videobufpos = 8*vst->slices + 1; 00638 vst->cur_slice = 0; 00639 vst->curpic_num = pic_num; 00640 vst->pktpos = avio_tell(pb); 00641 } 00642 if(type == 2) 00643 len = FFMIN(len, pos); 00644 00645 if(++vst->cur_slice > vst->slices) 00646 return 1; 00647 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1); 00648 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1); 00649 if(vst->videobufpos + len > vst->videobufsize) 00650 return 1; 00651 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len) 00652 return AVERROR(EIO); 00653 vst->videobufpos += len; 00654 rm->remaining_len-= len; 00655 00656 if(type == 2 || (vst->videobufpos) == vst->videobufsize){ 00657 vst->pkt.data[0] = vst->cur_slice-1; 00658 *pkt= vst->pkt; 00659 vst->pkt.data= NULL; 00660 vst->pkt.size= 0; 00661 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin 00662 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices, 00663 vst->videobufpos - 1 - 8*vst->slices); 00664 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices); 00665 pkt->pts = AV_NOPTS_VALUE; 00666 pkt->pos = vst->pktpos; 00667 vst->slices = 0; 00668 return 0; 00669 } 00670 00671 return 1; 00672 } 00673 00674 static inline void 00675 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt) 00676 { 00677 uint8_t *ptr; 00678 int j; 00679 00680 if (st->codec->codec_id == CODEC_ID_AC3) { 00681 ptr = pkt->data; 00682 for (j=0;j<pkt->size;j+=2) { 00683 FFSWAP(int, ptr[0], ptr[1]); 00684 ptr += 2; 00685 } 00686 } 00687 } 00688 00693 void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize) 00694 { 00695 int n, bs = sub_packet_h * framesize * 2 / 96; // nibbles per subpacket 00696 00697 for (n = 0; n < 38; n++) { 00698 int j; 00699 int i = bs * sipr_swaps[n][0]; 00700 int o = bs * sipr_swaps[n][1]; 00701 00702 /* swap 4bit-nibbles of block 'i' with 'o' */ 00703 for (j = 0; j < bs; j++, i++, o++) { 00704 int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF, 00705 y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF; 00706 00707 buf[o >> 1] = (x << (4 * (o & 1))) | 00708 (buf[o >> 1] & (0xF << (4 * !(o & 1)))); 00709 buf[i >> 1] = (y << (4 * (i & 1))) | 00710 (buf[i >> 1] & (0xF << (4 * !(i & 1)))); 00711 } 00712 } 00713 } 00714 00715 int 00716 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb, 00717 AVStream *st, RMStream *ast, int len, AVPacket *pkt, 00718 int *seq, int flags, int64_t timestamp) 00719 { 00720 RMDemuxContext *rm = s->priv_data; 00721 00722 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 00723 rm->current_stream= st->id; 00724 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq)) 00725 return -1; //got partial frame 00726 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { 00727 if ((st->codec->codec_id == CODEC_ID_RA_288) || 00728 (st->codec->codec_id == CODEC_ID_COOK) || 00729 (st->codec->codec_id == CODEC_ID_ATRAC3) || 00730 (st->codec->codec_id == CODEC_ID_SIPR)) { 00731 int x; 00732 int sps = ast->sub_packet_size; 00733 int cfs = ast->coded_framesize; 00734 int h = ast->sub_packet_h; 00735 int y = ast->sub_packet_cnt; 00736 int w = ast->audio_framesize; 00737 00738 if (flags & 2) 00739 y = ast->sub_packet_cnt = 0; 00740 if (!y) 00741 ast->audiotimestamp = timestamp; 00742 00743 switch(st->codec->codec_id) { 00744 case CODEC_ID_RA_288: 00745 for (x = 0; x < h/2; x++) 00746 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs); 00747 break; 00748 case CODEC_ID_ATRAC3: 00749 case CODEC_ID_COOK: 00750 for (x = 0; x < w/sps; x++) 00751 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps); 00752 break; 00753 case CODEC_ID_SIPR: 00754 avio_read(pb, ast->pkt.data + y * w, w); 00755 break; 00756 } 00757 00758 if (++(ast->sub_packet_cnt) < h) 00759 return -1; 00760 if (st->codec->codec_id == CODEC_ID_SIPR) 00761 ff_rm_reorder_sipr_data(ast->pkt.data, h, w); 00762 00763 ast->sub_packet_cnt = 0; 00764 rm->audio_stream_num = st->index; 00765 rm->audio_pkt_cnt = h * w / st->codec->block_align; 00766 } else if (st->codec->codec_id == CODEC_ID_AAC) { 00767 int x; 00768 rm->audio_stream_num = st->index; 00769 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4; 00770 if (ast->sub_packet_cnt) { 00771 for (x = 0; x < ast->sub_packet_cnt; x++) 00772 ast->sub_packet_lengths[x] = avio_rb16(pb); 00773 rm->audio_pkt_cnt = ast->sub_packet_cnt; 00774 ast->audiotimestamp = timestamp; 00775 } else 00776 return -1; 00777 } else { 00778 av_get_packet(pb, pkt, len); 00779 rm_ac3_swap_bytes(st, pkt); 00780 } 00781 } else 00782 av_get_packet(pb, pkt, len); 00783 00784 pkt->stream_index = st->index; 00785 00786 #if 0 00787 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 00788 if(st->codec->codec_id == CODEC_ID_RV20){ 00789 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1); 00790 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq); 00791 00792 seq |= (timestamp&~0x3FFF); 00793 if(seq - timestamp > 0x2000) seq -= 0x4000; 00794 if(seq - timestamp < -0x2000) seq += 0x4000; 00795 } 00796 } 00797 #endif 00798 00799 pkt->pts= timestamp; 00800 if (flags & 2) 00801 pkt->flags |= AV_PKT_FLAG_KEY; 00802 00803 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0; 00804 } 00805 00806 int 00807 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb, 00808 AVStream *st, RMStream *ast, AVPacket *pkt) 00809 { 00810 RMDemuxContext *rm = s->priv_data; 00811 00812 assert (rm->audio_pkt_cnt > 0); 00813 00814 if (st->codec->codec_id == CODEC_ID_AAC) 00815 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]); 00816 else { 00817 av_new_packet(pkt, st->codec->block_align); 00818 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this 00819 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt), 00820 st->codec->block_align); 00821 } 00822 rm->audio_pkt_cnt--; 00823 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) { 00824 ast->audiotimestamp = AV_NOPTS_VALUE; 00825 pkt->flags = AV_PKT_FLAG_KEY; 00826 } else 00827 pkt->flags = 0; 00828 pkt->stream_index = st->index; 00829 00830 return rm->audio_pkt_cnt; 00831 } 00832 00833 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt) 00834 { 00835 RMDemuxContext *rm = s->priv_data; 00836 AVStream *st; 00837 int i, len, res, seq = 1; 00838 int64_t timestamp, pos; 00839 int flags; 00840 00841 for (;;) { 00842 if (rm->audio_pkt_cnt) { 00843 // If there are queued audio packet return them first 00844 st = s->streams[rm->audio_stream_num]; 00845 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt); 00846 flags = 0; 00847 } else { 00848 if (rm->old_format) { 00849 RMStream *ast; 00850 00851 st = s->streams[0]; 00852 ast = st->priv_data; 00853 timestamp = AV_NOPTS_VALUE; 00854 len = !ast->audio_framesize ? RAW_PACKET_SIZE : 00855 ast->coded_framesize * ast->sub_packet_h / 2; 00856 flags = (seq++ == 1) ? 2 : 0; 00857 pos = avio_tell(s->pb); 00858 } else { 00859 len=sync(s, ×tamp, &flags, &i, &pos); 00860 if (len > 0) 00861 st = s->streams[i]; 00862 } 00863 00864 if(len<0 || s->pb->eof_reached) 00865 return AVERROR(EIO); 00866 00867 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt, 00868 &seq, flags, timestamp); 00869 if((flags&2) && (seq&0x7F) == 1) 00870 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME); 00871 if (res) 00872 continue; 00873 } 00874 00875 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2)) 00876 || st->discard >= AVDISCARD_ALL){ 00877 av_free_packet(pkt); 00878 } else 00879 break; 00880 } 00881 00882 return 0; 00883 } 00884 00885 static int rm_read_close(AVFormatContext *s) 00886 { 00887 int i; 00888 00889 for (i=0;i<s->nb_streams;i++) 00890 ff_rm_free_rmstream(s->streams[i]->priv_data); 00891 00892 return 0; 00893 } 00894 00895 static int rm_probe(AVProbeData *p) 00896 { 00897 /* check file header */ 00898 if ((p->buf[0] == '.' && p->buf[1] == 'R' && 00899 p->buf[2] == 'M' && p->buf[3] == 'F' && 00900 p->buf[4] == 0 && p->buf[5] == 0) || 00901 (p->buf[0] == '.' && p->buf[1] == 'r' && 00902 p->buf[2] == 'a' && p->buf[3] == 0xfd)) 00903 return AVPROBE_SCORE_MAX; 00904 else 00905 return 0; 00906 } 00907 00908 static int64_t rm_read_dts(AVFormatContext *s, int stream_index, 00909 int64_t *ppos, int64_t pos_limit) 00910 { 00911 RMDemuxContext *rm = s->priv_data; 00912 int64_t pos, dts; 00913 int stream_index2, flags, len, h; 00914 00915 pos = *ppos; 00916 00917 if(rm->old_format) 00918 return AV_NOPTS_VALUE; 00919 00920 avio_seek(s->pb, pos, SEEK_SET); 00921 rm->remaining_len=0; 00922 for(;;){ 00923 int seq=1; 00924 AVStream *st; 00925 00926 len=sync(s, &dts, &flags, &stream_index2, &pos); 00927 if(len<0) 00928 return AV_NOPTS_VALUE; 00929 00930 st = s->streams[stream_index2]; 00931 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 00932 h= avio_r8(s->pb); len--; 00933 if(!(h & 0x40)){ 00934 seq = avio_r8(s->pb); len--; 00935 } 00936 } 00937 00938 if((flags&2) && (seq&0x7F) == 1){ 00939 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq); 00940 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME); 00941 if(stream_index2 == stream_index) 00942 break; 00943 } 00944 00945 avio_skip(s->pb, len); 00946 } 00947 *ppos = pos; 00948 return dts; 00949 } 00950 00951 AVInputFormat ff_rm_demuxer = { 00952 "rm", 00953 NULL_IF_CONFIG_SMALL("RealMedia format"), 00954 sizeof(RMDemuxContext), 00955 rm_probe, 00956 rm_read_header, 00957 rm_read_packet, 00958 rm_read_close, 00959 NULL, 00960 rm_read_dts, 00961 }; 00962 00963 AVInputFormat ff_rdt_demuxer = { 00964 "rdt", 00965 NULL_IF_CONFIG_SMALL("RDT demuxer"), 00966 sizeof(RMDemuxContext), 00967 NULL, 00968 NULL, 00969 NULL, 00970 rm_read_close, 00971 };