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 goto skip; 00355 00356 for (n = 0; n < n_pkts; n++) { 00357 avio_skip(pb, 2); 00358 pts = avio_rb32(pb); 00359 pos = avio_rb32(pb); 00360 avio_skip(pb, 4); /* packet no. */ 00361 00362 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME); 00363 } 00364 00365 skip: 00366 if (next_off && avio_tell(pb) != next_off && 00367 avio_seek(pb, next_off, SEEK_SET) < 0) 00368 return -1; 00369 } while (next_off); 00370 00371 return 0; 00372 } 00373 00374 static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap) 00375 { 00376 RMDemuxContext *rm = s->priv_data; 00377 AVStream *st; 00378 00379 rm->old_format = 1; 00380 st = av_new_stream(s, 0); 00381 if (!st) 00382 return -1; 00383 st->priv_data = ff_rm_alloc_rmstream(); 00384 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1); 00385 } 00386 00387 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap) 00388 { 00389 RMDemuxContext *rm = s->priv_data; 00390 AVStream *st; 00391 AVIOContext *pb = s->pb; 00392 unsigned int tag; 00393 int tag_size; 00394 unsigned int start_time, duration; 00395 unsigned int data_off = 0, indx_off = 0; 00396 char buf[128]; 00397 int flags = 0; 00398 00399 tag = avio_rl32(pb); 00400 if (tag == MKTAG('.', 'r', 'a', 0xfd)) { 00401 /* very old .ra format */ 00402 return rm_read_header_old(s, ap); 00403 } else if (tag != MKTAG('.', 'R', 'M', 'F')) { 00404 return AVERROR(EIO); 00405 } 00406 00407 avio_rb32(pb); /* header size */ 00408 avio_rb16(pb); 00409 avio_rb32(pb); 00410 avio_rb32(pb); /* number of headers */ 00411 00412 for(;;) { 00413 if (pb->eof_reached) 00414 return -1; 00415 tag = avio_rl32(pb); 00416 tag_size = avio_rb32(pb); 00417 avio_rb16(pb); 00418 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n", 00419 (tag ) & 0xff, 00420 (tag >> 8) & 0xff, 00421 (tag >> 16) & 0xff, 00422 (tag >> 24) & 0xff, 00423 tag, 00424 tag_size); 00425 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A')) 00426 return -1; 00427 switch(tag) { 00428 case MKTAG('P', 'R', 'O', 'P'): 00429 /* file header */ 00430 avio_rb32(pb); /* max bit rate */ 00431 avio_rb32(pb); /* avg bit rate */ 00432 avio_rb32(pb); /* max packet size */ 00433 avio_rb32(pb); /* avg packet size */ 00434 avio_rb32(pb); /* nb packets */ 00435 avio_rb32(pb); /* duration */ 00436 avio_rb32(pb); /* preroll */ 00437 indx_off = avio_rb32(pb); /* index offset */ 00438 data_off = avio_rb32(pb); /* data offset */ 00439 avio_rb16(pb); /* nb streams */ 00440 flags = avio_rb16(pb); /* flags */ 00441 break; 00442 case MKTAG('C', 'O', 'N', 'T'): 00443 rm_read_metadata(s, 1); 00444 break; 00445 case MKTAG('M', 'D', 'P', 'R'): 00446 st = av_new_stream(s, 0); 00447 if (!st) 00448 return AVERROR(ENOMEM); 00449 st->id = avio_rb16(pb); 00450 avio_rb32(pb); /* max bit rate */ 00451 st->codec->bit_rate = avio_rb32(pb); /* bit rate */ 00452 avio_rb32(pb); /* max packet size */ 00453 avio_rb32(pb); /* avg packet size */ 00454 start_time = avio_rb32(pb); /* start time */ 00455 avio_rb32(pb); /* preroll */ 00456 duration = avio_rb32(pb); /* duration */ 00457 st->start_time = start_time; 00458 st->duration = duration; 00459 get_str8(pb, buf, sizeof(buf)); /* desc */ 00460 get_str8(pb, buf, sizeof(buf)); /* mimetype */ 00461 st->codec->codec_type = AVMEDIA_TYPE_DATA; 00462 st->priv_data = ff_rm_alloc_rmstream(); 00463 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data, 00464 avio_rb32(pb)) < 0) 00465 return -1; 00466 break; 00467 case MKTAG('D', 'A', 'T', 'A'): 00468 goto header_end; 00469 default: 00470 /* unknown tag: skip it */ 00471 avio_skip(pb, tag_size - 10); 00472 break; 00473 } 00474 } 00475 header_end: 00476 rm->nb_packets = avio_rb32(pb); /* number of packets */ 00477 if (!rm->nb_packets && (flags & 4)) 00478 rm->nb_packets = 3600 * 25; 00479 avio_rb32(pb); /* next data header */ 00480 00481 if (!data_off) 00482 data_off = avio_tell(pb) - 18; 00483 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) && 00484 avio_seek(pb, indx_off, SEEK_SET) >= 0) { 00485 rm_read_index(s); 00486 avio_seek(pb, data_off + 18, SEEK_SET); 00487 } 00488 00489 return 0; 00490 } 00491 00492 static int get_num(AVIOContext *pb, int *len) 00493 { 00494 int n, n1; 00495 00496 n = avio_rb16(pb); 00497 (*len)-=2; 00498 n &= 0x7FFF; 00499 if (n >= 0x4000) { 00500 return n - 0x4000; 00501 } else { 00502 n1 = avio_rb16(pb); 00503 (*len)-=2; 00504 return (n << 16) | n1; 00505 } 00506 } 00507 00508 /* multiple of 20 bytes for ra144 (ugly) */ 00509 #define RAW_PACKET_SIZE 1000 00510 00511 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){ 00512 RMDemuxContext *rm = s->priv_data; 00513 AVIOContext *pb = s->pb; 00514 AVStream *st; 00515 uint32_t state=0xFFFFFFFF; 00516 00517 while(!pb->eof_reached){ 00518 int len, num, i; 00519 *pos= avio_tell(pb) - 3; 00520 if(rm->remaining_len > 0){ 00521 num= rm->current_stream; 00522 len= rm->remaining_len; 00523 *timestamp = AV_NOPTS_VALUE; 00524 *flags= 0; 00525 }else{ 00526 state= (state<<8) + avio_r8(pb); 00527 00528 if(state == MKBETAG('I', 'N', 'D', 'X')){ 00529 int n_pkts, expected_len; 00530 len = avio_rb32(pb); 00531 avio_skip(pb, 2); 00532 n_pkts = avio_rb32(pb); 00533 expected_len = 20 + n_pkts * 14; 00534 if (len == 20) 00535 /* some files don't add index entries to chunk size... */ 00536 len = expected_len; 00537 else if (len != expected_len) 00538 av_log(s, AV_LOG_WARNING, 00539 "Index size %d (%d pkts) is wrong, should be %d.\n", 00540 len, n_pkts, expected_len); 00541 len -= 14; // we already read part of the index header 00542 if(len<0) 00543 continue; 00544 goto skip; 00545 } else if (state == MKBETAG('D','A','T','A')) { 00546 av_log(s, AV_LOG_WARNING, 00547 "DATA tag in middle of chunk, file may be broken.\n"); 00548 } 00549 00550 if(state > (unsigned)0xFFFF || state <= 12) 00551 continue; 00552 len=state - 12; 00553 state= 0xFFFFFFFF; 00554 00555 num = avio_rb16(pb); 00556 *timestamp = avio_rb32(pb); 00557 avio_r8(pb); /* reserved */ 00558 *flags = avio_r8(pb); /* flags */ 00559 } 00560 for(i=0;i<s->nb_streams;i++) { 00561 st = s->streams[i]; 00562 if (num == st->id) 00563 break; 00564 } 00565 if (i == s->nb_streams) { 00566 skip: 00567 /* skip packet if unknown number */ 00568 avio_skip(pb, len); 00569 rm->remaining_len = 0; 00570 continue; 00571 } 00572 *stream_index= i; 00573 00574 return len; 00575 } 00576 return -1; 00577 } 00578 00579 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb, 00580 RMDemuxContext *rm, RMStream *vst, 00581 AVPacket *pkt, int len, int *pseq) 00582 { 00583 int hdr, seq, pic_num, len2, pos; 00584 int type; 00585 00586 hdr = avio_r8(pb); len--; 00587 type = hdr >> 6; 00588 00589 if(type != 3){ // not frame as a part of packet 00590 seq = avio_r8(pb); len--; 00591 } 00592 if(type != 1){ // not whole frame 00593 len2 = get_num(pb, &len); 00594 pos = get_num(pb, &len); 00595 pic_num = avio_r8(pb); len--; 00596 } 00597 if(len<0) 00598 return -1; 00599 rm->remaining_len = len; 00600 if(type&1){ // frame, not slice 00601 if(type == 3) // frame as a part of packet 00602 len= len2; 00603 if(rm->remaining_len < len) 00604 return -1; 00605 rm->remaining_len -= len; 00606 if(av_new_packet(pkt, len + 9) < 0) 00607 return AVERROR(EIO); 00608 pkt->data[0] = 0; 00609 AV_WL32(pkt->data + 1, 1); 00610 AV_WL32(pkt->data + 5, 0); 00611 avio_read(pb, pkt->data + 9, len); 00612 return 0; 00613 } 00614 //now we have to deal with single slice 00615 00616 *pseq = seq; 00617 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){ 00618 vst->slices = ((hdr & 0x3F) << 1) + 1; 00619 vst->videobufsize = len2 + 8*vst->slices + 1; 00620 av_free_packet(&vst->pkt); //FIXME this should be output. 00621 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0) 00622 return AVERROR(ENOMEM); 00623 vst->videobufpos = 8*vst->slices + 1; 00624 vst->cur_slice = 0; 00625 vst->curpic_num = pic_num; 00626 vst->pktpos = avio_tell(pb); 00627 } 00628 if(type == 2) 00629 len = FFMIN(len, pos); 00630 00631 if(++vst->cur_slice > vst->slices) 00632 return 1; 00633 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1); 00634 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1); 00635 if(vst->videobufpos + len > vst->videobufsize) 00636 return 1; 00637 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len) 00638 return AVERROR(EIO); 00639 vst->videobufpos += len; 00640 rm->remaining_len-= len; 00641 00642 if(type == 2 || (vst->videobufpos) == vst->videobufsize){ 00643 vst->pkt.data[0] = vst->cur_slice-1; 00644 *pkt= vst->pkt; 00645 vst->pkt.data= NULL; 00646 vst->pkt.size= 0; 00647 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin 00648 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices, 00649 vst->videobufpos - 1 - 8*vst->slices); 00650 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices); 00651 pkt->pts = AV_NOPTS_VALUE; 00652 pkt->pos = vst->pktpos; 00653 vst->slices = 0; 00654 return 0; 00655 } 00656 00657 return 1; 00658 } 00659 00660 static inline void 00661 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt) 00662 { 00663 uint8_t *ptr; 00664 int j; 00665 00666 if (st->codec->codec_id == CODEC_ID_AC3) { 00667 ptr = pkt->data; 00668 for (j=0;j<pkt->size;j+=2) { 00669 FFSWAP(int, ptr[0], ptr[1]); 00670 ptr += 2; 00671 } 00672 } 00673 } 00674 00679 void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize) 00680 { 00681 int n, bs = sub_packet_h * framesize * 2 / 96; // nibbles per subpacket 00682 00683 for (n = 0; n < 38; n++) { 00684 int j; 00685 int i = bs * sipr_swaps[n][0]; 00686 int o = bs * sipr_swaps[n][1]; 00687 00688 /* swap 4bit-nibbles of block 'i' with 'o' */ 00689 for (j = 0; j < bs; j++, i++, o++) { 00690 int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF, 00691 y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF; 00692 00693 buf[o >> 1] = (x << (4 * (o & 1))) | 00694 (buf[o >> 1] & (0xF << (4 * !(o & 1)))); 00695 buf[i >> 1] = (y << (4 * (i & 1))) | 00696 (buf[i >> 1] & (0xF << (4 * !(i & 1)))); 00697 } 00698 } 00699 } 00700 00701 int 00702 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb, 00703 AVStream *st, RMStream *ast, int len, AVPacket *pkt, 00704 int *seq, int flags, int64_t timestamp) 00705 { 00706 RMDemuxContext *rm = s->priv_data; 00707 00708 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 00709 rm->current_stream= st->id; 00710 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq)) 00711 return -1; //got partial frame 00712 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { 00713 if ((st->codec->codec_id == CODEC_ID_RA_288) || 00714 (st->codec->codec_id == CODEC_ID_COOK) || 00715 (st->codec->codec_id == CODEC_ID_ATRAC3) || 00716 (st->codec->codec_id == CODEC_ID_SIPR)) { 00717 int x; 00718 int sps = ast->sub_packet_size; 00719 int cfs = ast->coded_framesize; 00720 int h = ast->sub_packet_h; 00721 int y = ast->sub_packet_cnt; 00722 int w = ast->audio_framesize; 00723 00724 if (flags & 2) 00725 y = ast->sub_packet_cnt = 0; 00726 if (!y) 00727 ast->audiotimestamp = timestamp; 00728 00729 switch(st->codec->codec_id) { 00730 case CODEC_ID_RA_288: 00731 for (x = 0; x < h/2; x++) 00732 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs); 00733 break; 00734 case CODEC_ID_ATRAC3: 00735 case CODEC_ID_COOK: 00736 for (x = 0; x < w/sps; x++) 00737 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps); 00738 break; 00739 case CODEC_ID_SIPR: 00740 avio_read(pb, ast->pkt.data + y * w, w); 00741 break; 00742 } 00743 00744 if (++(ast->sub_packet_cnt) < h) 00745 return -1; 00746 if (st->codec->codec_id == CODEC_ID_SIPR) 00747 ff_rm_reorder_sipr_data(ast->pkt.data, h, w); 00748 00749 ast->sub_packet_cnt = 0; 00750 rm->audio_stream_num = st->index; 00751 rm->audio_pkt_cnt = h * w / st->codec->block_align; 00752 } else if (st->codec->codec_id == CODEC_ID_AAC) { 00753 int x; 00754 rm->audio_stream_num = st->index; 00755 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4; 00756 if (ast->sub_packet_cnt) { 00757 for (x = 0; x < ast->sub_packet_cnt; x++) 00758 ast->sub_packet_lengths[x] = avio_rb16(pb); 00759 rm->audio_pkt_cnt = ast->sub_packet_cnt; 00760 ast->audiotimestamp = timestamp; 00761 } else 00762 return -1; 00763 } else { 00764 av_get_packet(pb, pkt, len); 00765 rm_ac3_swap_bytes(st, pkt); 00766 } 00767 } else 00768 av_get_packet(pb, pkt, len); 00769 00770 pkt->stream_index = st->index; 00771 00772 #if 0 00773 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 00774 if(st->codec->codec_id == CODEC_ID_RV20){ 00775 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1); 00776 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq); 00777 00778 seq |= (timestamp&~0x3FFF); 00779 if(seq - timestamp > 0x2000) seq -= 0x4000; 00780 if(seq - timestamp < -0x2000) seq += 0x4000; 00781 } 00782 } 00783 #endif 00784 00785 pkt->pts= timestamp; 00786 if (flags & 2) 00787 pkt->flags |= AV_PKT_FLAG_KEY; 00788 00789 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0; 00790 } 00791 00792 int 00793 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb, 00794 AVStream *st, RMStream *ast, AVPacket *pkt) 00795 { 00796 RMDemuxContext *rm = s->priv_data; 00797 00798 assert (rm->audio_pkt_cnt > 0); 00799 00800 if (st->codec->codec_id == CODEC_ID_AAC) 00801 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]); 00802 else { 00803 av_new_packet(pkt, st->codec->block_align); 00804 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this 00805 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt), 00806 st->codec->block_align); 00807 } 00808 rm->audio_pkt_cnt--; 00809 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) { 00810 ast->audiotimestamp = AV_NOPTS_VALUE; 00811 pkt->flags = AV_PKT_FLAG_KEY; 00812 } else 00813 pkt->flags = 0; 00814 pkt->stream_index = st->index; 00815 00816 return rm->audio_pkt_cnt; 00817 } 00818 00819 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt) 00820 { 00821 RMDemuxContext *rm = s->priv_data; 00822 AVStream *st; 00823 int i, len, res, seq = 1; 00824 int64_t timestamp, pos; 00825 int flags; 00826 00827 for (;;) { 00828 if (rm->audio_pkt_cnt) { 00829 // If there are queued audio packet return them first 00830 st = s->streams[rm->audio_stream_num]; 00831 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt); 00832 flags = 0; 00833 } else { 00834 if (rm->old_format) { 00835 RMStream *ast; 00836 00837 st = s->streams[0]; 00838 ast = st->priv_data; 00839 timestamp = AV_NOPTS_VALUE; 00840 len = !ast->audio_framesize ? RAW_PACKET_SIZE : 00841 ast->coded_framesize * ast->sub_packet_h / 2; 00842 flags = (seq++ == 1) ? 2 : 0; 00843 pos = avio_tell(s->pb); 00844 } else { 00845 len=sync(s, ×tamp, &flags, &i, &pos); 00846 if (len > 0) 00847 st = s->streams[i]; 00848 } 00849 00850 if(len<0 || s->pb->eof_reached) 00851 return AVERROR(EIO); 00852 00853 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt, 00854 &seq, flags, timestamp); 00855 if((flags&2) && (seq&0x7F) == 1) 00856 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME); 00857 if (res) 00858 continue; 00859 } 00860 00861 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2)) 00862 || st->discard >= AVDISCARD_ALL){ 00863 av_free_packet(pkt); 00864 } else 00865 break; 00866 } 00867 00868 return 0; 00869 } 00870 00871 static int rm_read_close(AVFormatContext *s) 00872 { 00873 int i; 00874 00875 for (i=0;i<s->nb_streams;i++) 00876 ff_rm_free_rmstream(s->streams[i]->priv_data); 00877 00878 return 0; 00879 } 00880 00881 static int rm_probe(AVProbeData *p) 00882 { 00883 /* check file header */ 00884 if ((p->buf[0] == '.' && p->buf[1] == 'R' && 00885 p->buf[2] == 'M' && p->buf[3] == 'F' && 00886 p->buf[4] == 0 && p->buf[5] == 0) || 00887 (p->buf[0] == '.' && p->buf[1] == 'r' && 00888 p->buf[2] == 'a' && p->buf[3] == 0xfd)) 00889 return AVPROBE_SCORE_MAX; 00890 else 00891 return 0; 00892 } 00893 00894 static int64_t rm_read_dts(AVFormatContext *s, int stream_index, 00895 int64_t *ppos, int64_t pos_limit) 00896 { 00897 RMDemuxContext *rm = s->priv_data; 00898 int64_t pos, dts; 00899 int stream_index2, flags, len, h; 00900 00901 pos = *ppos; 00902 00903 if(rm->old_format) 00904 return AV_NOPTS_VALUE; 00905 00906 avio_seek(s->pb, pos, SEEK_SET); 00907 rm->remaining_len=0; 00908 for(;;){ 00909 int seq=1; 00910 AVStream *st; 00911 00912 len=sync(s, &dts, &flags, &stream_index2, &pos); 00913 if(len<0) 00914 return AV_NOPTS_VALUE; 00915 00916 st = s->streams[stream_index2]; 00917 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 00918 h= avio_r8(s->pb); len--; 00919 if(!(h & 0x40)){ 00920 seq = avio_r8(s->pb); len--; 00921 } 00922 } 00923 00924 if((flags&2) && (seq&0x7F) == 1){ 00925 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq); 00926 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME); 00927 if(stream_index2 == stream_index) 00928 break; 00929 } 00930 00931 avio_skip(s->pb, len); 00932 } 00933 *ppos = pos; 00934 return dts; 00935 } 00936 00937 AVInputFormat ff_rm_demuxer = { 00938 "rm", 00939 NULL_IF_CONFIG_SMALL("RealMedia format"), 00940 sizeof(RMDemuxContext), 00941 rm_probe, 00942 rm_read_header, 00943 rm_read_packet, 00944 rm_read_close, 00945 NULL, 00946 rm_read_dts, 00947 }; 00948 00949 AVInputFormat ff_rdt_demuxer = { 00950 "rdt", 00951 NULL_IF_CONFIG_SMALL("RDT demuxer"), 00952 sizeof(RMDemuxContext), 00953 NULL, 00954 NULL, 00955 NULL, 00956 rm_read_close, 00957 };