Libav 0.7.1
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00001 /* 00002 * ASF 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 //#define DEBUG 00023 00024 #include "libavutil/bswap.h" 00025 #include "libavutil/common.h" 00026 #include "libavutil/avstring.h" 00027 #include "libavutil/dict.h" 00028 #include "libavcodec/mpegaudio.h" 00029 #include "avformat.h" 00030 #include "avio_internal.h" 00031 #include "riff.h" 00032 #include "asf.h" 00033 #include "asfcrypt.h" 00034 #include "avlanguage.h" 00035 00036 typedef struct { 00037 int asfid2avid[128]; 00038 ASFStream streams[128]; 00039 uint32_t stream_bitrates[128]; 00040 AVRational dar[128]; 00041 char stream_languages[128][6]; 00042 /* non streamed additonnal info */ 00043 /* packet filling */ 00044 int packet_size_left; 00045 /* only for reading */ 00046 uint64_t data_offset; 00047 uint64_t data_object_offset; 00048 uint64_t data_object_size; 00049 int index_read; 00050 00051 ASFMainHeader hdr; 00052 00053 int packet_flags; 00054 int packet_property; 00055 int packet_timestamp; 00056 int packet_segsizetype; 00057 int packet_segments; 00058 int packet_seq; 00059 int packet_replic_size; 00060 int packet_key_frame; 00061 int packet_padsize; 00062 unsigned int packet_frag_offset; 00063 unsigned int packet_frag_size; 00064 int64_t packet_frag_timestamp; 00065 int packet_multi_size; 00066 int packet_obj_size; 00067 int packet_time_delta; 00068 int packet_time_start; 00069 int64_t packet_pos; 00070 00071 int stream_index; 00072 00073 ASFStream* asf_st; 00074 } ASFContext; 00075 00076 #undef NDEBUG 00077 #include <assert.h> 00078 00079 #define ASF_MAX_STREAMS 127 00080 #define FRAME_HEADER_SIZE 17 00081 // Fix Me! FRAME_HEADER_SIZE may be different. 00082 00083 static const ff_asf_guid index_guid = { 00084 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb 00085 }; 00086 00087 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */ 00088 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2 00089 }; 00090 /**********************************/ 00091 /* decoding */ 00092 00093 #ifdef DEBUG 00094 #define PRINT_IF_GUID(g,cmp) \ 00095 if (!ff_guidcmp(g, &cmp)) \ 00096 av_dlog(NULL, "(GUID: %s) ", #cmp) 00097 00098 static void print_guid(const ff_asf_guid *g) 00099 { 00100 int i; 00101 PRINT_IF_GUID(g, ff_asf_header); 00102 else PRINT_IF_GUID(g, ff_asf_file_header); 00103 else PRINT_IF_GUID(g, ff_asf_stream_header); 00104 else PRINT_IF_GUID(g, ff_asf_audio_stream); 00105 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none); 00106 else PRINT_IF_GUID(g, ff_asf_video_stream); 00107 else PRINT_IF_GUID(g, ff_asf_video_conceal_none); 00108 else PRINT_IF_GUID(g, ff_asf_command_stream); 00109 else PRINT_IF_GUID(g, ff_asf_comment_header); 00110 else PRINT_IF_GUID(g, ff_asf_codec_comment_header); 00111 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header); 00112 else PRINT_IF_GUID(g, ff_asf_data_header); 00113 else PRINT_IF_GUID(g, index_guid); 00114 else PRINT_IF_GUID(g, ff_asf_head1_guid); 00115 else PRINT_IF_GUID(g, ff_asf_head2_guid); 00116 else PRINT_IF_GUID(g, ff_asf_my_guid); 00117 else PRINT_IF_GUID(g, ff_asf_ext_stream_header); 00118 else PRINT_IF_GUID(g, ff_asf_extended_content_header); 00119 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header); 00120 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream); 00121 else PRINT_IF_GUID(g, ff_asf_metadata_header); 00122 else PRINT_IF_GUID(g, ff_asf_marker_header); 00123 else PRINT_IF_GUID(g, stream_bitrate_guid); 00124 else PRINT_IF_GUID(g, ff_asf_language_guid); 00125 else 00126 av_dlog(NULL, "(GUID: unknown) "); 00127 for(i=0;i<16;i++) 00128 av_dlog(NULL, " 0x%02x,", (*g)[i]); 00129 av_dlog(NULL, "}\n"); 00130 } 00131 #undef PRINT_IF_GUID 00132 #else 00133 #define print_guid(g) 00134 #endif 00135 00136 void ff_get_guid(AVIOContext *s, ff_asf_guid *g) 00137 { 00138 assert(sizeof(*g) == 16); 00139 avio_read(s, *g, sizeof(*g)); 00140 } 00141 00142 static int asf_probe(AVProbeData *pd) 00143 { 00144 /* check file header */ 00145 if (!ff_guidcmp(pd->buf, &ff_asf_header)) 00146 return AVPROBE_SCORE_MAX; 00147 else 00148 return 0; 00149 } 00150 00151 static int get_value(AVIOContext *pb, int type){ 00152 switch(type){ 00153 case 2: return avio_rl32(pb); 00154 case 3: return avio_rl32(pb); 00155 case 4: return avio_rl64(pb); 00156 case 5: return avio_rl16(pb); 00157 default:return INT_MIN; 00158 } 00159 } 00160 00161 static void get_tag(AVFormatContext *s, const char *key, int type, int len) 00162 { 00163 char *value; 00164 int64_t off = avio_tell(s->pb); 00165 00166 if ((unsigned)len >= (UINT_MAX - 1)/2) 00167 return; 00168 00169 value = av_malloc(2*len+1); 00170 if (!value) 00171 goto finish; 00172 00173 if (type == 0) { // UTF16-LE 00174 avio_get_str16le(s->pb, len, value, 2*len + 1); 00175 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD 00176 uint64_t num = get_value(s->pb, type); 00177 snprintf(value, len, "%"PRIu64, num); 00178 } else { 00179 av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key); 00180 goto finish; 00181 } 00182 if (*value) 00183 av_dict_set(&s->metadata, key, value, 0); 00184 finish: 00185 av_freep(&value); 00186 avio_seek(s->pb, off + len, SEEK_SET); 00187 } 00188 00189 static int asf_read_file_properties(AVFormatContext *s, int64_t size) 00190 { 00191 ASFContext *asf = s->priv_data; 00192 AVIOContext *pb = s->pb; 00193 00194 ff_get_guid(pb, &asf->hdr.guid); 00195 asf->hdr.file_size = avio_rl64(pb); 00196 asf->hdr.create_time = avio_rl64(pb); 00197 avio_rl64(pb); /* number of packets */ 00198 asf->hdr.play_time = avio_rl64(pb); 00199 asf->hdr.send_time = avio_rl64(pb); 00200 asf->hdr.preroll = avio_rl32(pb); 00201 asf->hdr.ignore = avio_rl32(pb); 00202 asf->hdr.flags = avio_rl32(pb); 00203 asf->hdr.min_pktsize = avio_rl32(pb); 00204 asf->hdr.max_pktsize = avio_rl32(pb); 00205 if (asf->hdr.min_pktsize >= (1U<<29)) 00206 return AVERROR_INVALIDDATA; 00207 asf->hdr.max_bitrate = avio_rl32(pb); 00208 s->packet_size = asf->hdr.max_pktsize; 00209 00210 return 0; 00211 } 00212 00213 static int asf_read_stream_properties(AVFormatContext *s, int64_t size) 00214 { 00215 ASFContext *asf = s->priv_data; 00216 AVIOContext *pb = s->pb; 00217 AVStream *st; 00218 ASFStream *asf_st; 00219 ff_asf_guid g; 00220 enum AVMediaType type; 00221 int type_specific_size, sizeX; 00222 unsigned int tag1; 00223 int64_t pos1, pos2, start_time; 00224 int test_for_ext_stream_audio, is_dvr_ms_audio=0; 00225 00226 if (s->nb_streams == ASF_MAX_STREAMS) { 00227 av_log(s, AV_LOG_ERROR, "too many streams\n"); 00228 return AVERROR(EINVAL); 00229 } 00230 00231 pos1 = avio_tell(pb); 00232 00233 st = av_new_stream(s, 0); 00234 if (!st) 00235 return AVERROR(ENOMEM); 00236 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ 00237 asf_st = av_mallocz(sizeof(ASFStream)); 00238 if (!asf_st) 00239 return AVERROR(ENOMEM); 00240 st->priv_data = asf_st; 00241 st->start_time = 0; 00242 start_time = asf->hdr.preroll; 00243 00244 asf_st->stream_language_index = 128; // invalid stream index means no language info 00245 00246 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming... 00247 st->duration = asf->hdr.play_time / 00248 (10000000 / 1000) - start_time; 00249 } 00250 ff_get_guid(pb, &g); 00251 00252 test_for_ext_stream_audio = 0; 00253 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) { 00254 type = AVMEDIA_TYPE_AUDIO; 00255 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) { 00256 type = AVMEDIA_TYPE_VIDEO; 00257 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) { 00258 type = AVMEDIA_TYPE_VIDEO; 00259 st->codec->codec_id = CODEC_ID_MJPEG; 00260 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) { 00261 type = AVMEDIA_TYPE_DATA; 00262 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) { 00263 test_for_ext_stream_audio = 1; 00264 type = AVMEDIA_TYPE_UNKNOWN; 00265 } else { 00266 return -1; 00267 } 00268 ff_get_guid(pb, &g); 00269 avio_skip(pb, 8); /* total_size */ 00270 type_specific_size = avio_rl32(pb); 00271 avio_rl32(pb); 00272 st->id = avio_rl16(pb) & 0x7f; /* stream id */ 00273 // mapping of asf ID to AV stream ID; 00274 asf->asfid2avid[st->id] = s->nb_streams - 1; 00275 00276 avio_rl32(pb); 00277 00278 if (test_for_ext_stream_audio) { 00279 ff_get_guid(pb, &g); 00280 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) { 00281 type = AVMEDIA_TYPE_AUDIO; 00282 is_dvr_ms_audio=1; 00283 ff_get_guid(pb, &g); 00284 avio_rl32(pb); 00285 avio_rl32(pb); 00286 avio_rl32(pb); 00287 ff_get_guid(pb, &g); 00288 avio_rl32(pb); 00289 } 00290 } 00291 00292 st->codec->codec_type = type; 00293 if (type == AVMEDIA_TYPE_AUDIO) { 00294 int ret = ff_get_wav_header(pb, st->codec, type_specific_size); 00295 if (ret < 0) 00296 return ret; 00297 if (is_dvr_ms_audio) { 00298 // codec_id and codec_tag are unreliable in dvr_ms 00299 // files. Set them later by probing stream. 00300 st->codec->codec_id = CODEC_ID_PROBE; 00301 st->codec->codec_tag = 0; 00302 } 00303 if (st->codec->codec_id == CODEC_ID_AAC) { 00304 st->need_parsing = AVSTREAM_PARSE_NONE; 00305 } else { 00306 st->need_parsing = AVSTREAM_PARSE_FULL; 00307 } 00308 /* We have to init the frame size at some point .... */ 00309 pos2 = avio_tell(pb); 00310 if (size >= (pos2 + 8 - pos1 + 24)) { 00311 asf_st->ds_span = avio_r8(pb); 00312 asf_st->ds_packet_size = avio_rl16(pb); 00313 asf_st->ds_chunk_size = avio_rl16(pb); 00314 avio_rl16(pb); //ds_data_size 00315 avio_r8(pb); //ds_silence_data 00316 } 00317 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n", 00318 // asf_st->ds_packet_size, asf_st->ds_chunk_size, 00319 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data); 00320 if (asf_st->ds_span > 1) { 00321 if (!asf_st->ds_chunk_size 00322 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1) 00323 || asf_st->ds_packet_size % asf_st->ds_chunk_size) 00324 asf_st->ds_span = 0; // disable descrambling 00325 } 00326 switch (st->codec->codec_id) { 00327 case CODEC_ID_MP3: 00328 st->codec->frame_size = MPA_FRAME_SIZE; 00329 break; 00330 case CODEC_ID_PCM_S16LE: 00331 case CODEC_ID_PCM_S16BE: 00332 case CODEC_ID_PCM_U16LE: 00333 case CODEC_ID_PCM_U16BE: 00334 case CODEC_ID_PCM_S8: 00335 case CODEC_ID_PCM_U8: 00336 case CODEC_ID_PCM_ALAW: 00337 case CODEC_ID_PCM_MULAW: 00338 st->codec->frame_size = 1; 00339 break; 00340 default: 00341 /* This is probably wrong, but it prevents a crash later */ 00342 st->codec->frame_size = 1; 00343 break; 00344 } 00345 } else if (type == AVMEDIA_TYPE_VIDEO && 00346 size - (avio_tell(pb) - pos1 + 24) >= 51) { 00347 avio_rl32(pb); 00348 avio_rl32(pb); 00349 avio_r8(pb); 00350 avio_rl16(pb); /* size */ 00351 sizeX= avio_rl32(pb); /* size */ 00352 st->codec->width = avio_rl32(pb); 00353 st->codec->height = avio_rl32(pb); 00354 /* not available for asf */ 00355 avio_rl16(pb); /* panes */ 00356 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */ 00357 tag1 = avio_rl32(pb); 00358 avio_skip(pb, 20); 00359 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX); 00360 if (sizeX > 40) { 00361 st->codec->extradata_size = sizeX - 40; 00362 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); 00363 avio_read(pb, st->codec->extradata, st->codec->extradata_size); 00364 } 00365 00366 /* Extract palette from extradata if bpp <= 8 */ 00367 /* This code assumes that extradata contains only palette */ 00368 /* This is true for all paletted codecs implemented in ffmpeg */ 00369 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) { 00370 int av_unused i; 00371 #if HAVE_BIGENDIAN 00372 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++) 00373 asf_st->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]); 00374 #else 00375 memcpy(asf_st->palette, st->codec->extradata, 00376 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)); 00377 #endif 00378 asf_st->palette_changed = 1; 00379 } 00380 00381 st->codec->codec_tag = tag1; 00382 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1); 00383 if(tag1 == MKTAG('D', 'V', 'R', ' ')){ 00384 st->need_parsing = AVSTREAM_PARSE_FULL; 00385 // issue658 containse wrong w/h and MS even puts a fake seq header with wrong w/h in extradata while a correct one is in te stream. maximum lameness 00386 st->codec->width = 00387 st->codec->height = 0; 00388 av_freep(&st->codec->extradata); 00389 st->codec->extradata_size=0; 00390 } 00391 if(st->codec->codec_id == CODEC_ID_H264) 00392 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE; 00393 } 00394 pos2 = avio_tell(pb); 00395 avio_skip(pb, size - (pos2 - pos1 + 24)); 00396 00397 return 0; 00398 } 00399 00400 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size) 00401 { 00402 ASFContext *asf = s->priv_data; 00403 AVIOContext *pb = s->pb; 00404 ff_asf_guid g; 00405 int ext_len, payload_ext_ct, stream_ct, i; 00406 uint32_t leak_rate, stream_num; 00407 unsigned int stream_languageid_index; 00408 00409 avio_rl64(pb); // starttime 00410 avio_rl64(pb); // endtime 00411 leak_rate = avio_rl32(pb); // leak-datarate 00412 avio_rl32(pb); // bucket-datasize 00413 avio_rl32(pb); // init-bucket-fullness 00414 avio_rl32(pb); // alt-leak-datarate 00415 avio_rl32(pb); // alt-bucket-datasize 00416 avio_rl32(pb); // alt-init-bucket-fullness 00417 avio_rl32(pb); // max-object-size 00418 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved) 00419 stream_num = avio_rl16(pb); // stream-num 00420 00421 stream_languageid_index = avio_rl16(pb); // stream-language-id-index 00422 if (stream_num < 128) 00423 asf->streams[stream_num].stream_language_index = stream_languageid_index; 00424 00425 avio_rl64(pb); // avg frametime in 100ns units 00426 stream_ct = avio_rl16(pb); //stream-name-count 00427 payload_ext_ct = avio_rl16(pb); //payload-extension-system-count 00428 00429 if (stream_num < 128) 00430 asf->stream_bitrates[stream_num] = leak_rate; 00431 00432 for (i=0; i<stream_ct; i++){ 00433 avio_rl16(pb); 00434 ext_len = avio_rl16(pb); 00435 avio_skip(pb, ext_len); 00436 } 00437 00438 for (i=0; i<payload_ext_ct; i++){ 00439 ff_get_guid(pb, &g); 00440 avio_skip(pb, 2); 00441 ext_len=avio_rl32(pb); 00442 avio_skip(pb, ext_len); 00443 } 00444 00445 return 0; 00446 } 00447 00448 static int asf_read_content_desc(AVFormatContext *s, int64_t size) 00449 { 00450 AVIOContext *pb = s->pb; 00451 int len1, len2, len3, len4, len5; 00452 00453 len1 = avio_rl16(pb); 00454 len2 = avio_rl16(pb); 00455 len3 = avio_rl16(pb); 00456 len4 = avio_rl16(pb); 00457 len5 = avio_rl16(pb); 00458 get_tag(s, "title" , 0, len1); 00459 get_tag(s, "author" , 0, len2); 00460 get_tag(s, "copyright", 0, len3); 00461 get_tag(s, "comment" , 0, len4); 00462 avio_skip(pb, len5); 00463 00464 return 0; 00465 } 00466 00467 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size) 00468 { 00469 AVIOContext *pb = s->pb; 00470 ASFContext *asf = s->priv_data; 00471 int desc_count, i, ret; 00472 00473 desc_count = avio_rl16(pb); 00474 for(i=0;i<desc_count;i++) { 00475 int name_len,value_type,value_len; 00476 char name[1024]; 00477 00478 name_len = avio_rl16(pb); 00479 if (name_len%2) // must be even, broken lavf versions wrote len-1 00480 name_len += 1; 00481 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len) 00482 avio_skip(pb, name_len - ret); 00483 value_type = avio_rl16(pb); 00484 value_len = avio_rl16(pb); 00485 if (!value_type && value_len%2) 00486 value_len += 1; 00491 if (!strcmp(name, "AspectRatioX")){ 00492 asf->dar[0].num= get_value(s->pb, value_type); 00493 } else if(!strcmp(name, "AspectRatioY")){ 00494 asf->dar[0].den= get_value(s->pb, value_type); 00495 } else 00496 get_tag(s, name, value_type, value_len); 00497 } 00498 00499 return 0; 00500 } 00501 00502 static int asf_read_language_list(AVFormatContext *s, int64_t size) 00503 { 00504 AVIOContext *pb = s->pb; 00505 ASFContext *asf = s->priv_data; 00506 int j, ret; 00507 int stream_count = avio_rl16(pb); 00508 for(j = 0; j < stream_count; j++) { 00509 char lang[6]; 00510 unsigned int lang_len = avio_r8(pb); 00511 if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len) 00512 avio_skip(pb, lang_len - ret); 00513 if (j < 128) 00514 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages)); 00515 } 00516 00517 return 0; 00518 } 00519 00520 static int asf_read_metadata(AVFormatContext *s, int64_t size) 00521 { 00522 AVIOContext *pb = s->pb; 00523 ASFContext *asf = s->priv_data; 00524 int n, stream_num, name_len, value_len, value_num; 00525 int ret, i; 00526 n = avio_rl16(pb); 00527 00528 for(i=0;i<n;i++) { 00529 char name[1024]; 00530 00531 avio_rl16(pb); //lang_list_index 00532 stream_num= avio_rl16(pb); 00533 name_len= avio_rl16(pb); 00534 avio_skip(pb, 2); /* value_type */ 00535 value_len= avio_rl32(pb); 00536 00537 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len) 00538 avio_skip(pb, name_len - ret); 00539 //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name); 00540 value_num= avio_rl16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere 00541 avio_skip(pb, value_len - 2); 00542 00543 if(stream_num<128){ 00544 if (!strcmp(name, "AspectRatioX")) asf->dar[stream_num].num= value_num; 00545 else if(!strcmp(name, "AspectRatioY")) asf->dar[stream_num].den= value_num; 00546 } 00547 } 00548 00549 return 0; 00550 } 00551 00552 static int asf_read_marker(AVFormatContext *s, int64_t size) 00553 { 00554 AVIOContext *pb = s->pb; 00555 int i, count, name_len, ret; 00556 char name[1024]; 00557 00558 avio_rl64(pb); // reserved 16 bytes 00559 avio_rl64(pb); // ... 00560 count = avio_rl32(pb); // markers count 00561 avio_rl16(pb); // reserved 2 bytes 00562 name_len = avio_rl16(pb); // name length 00563 for(i=0;i<name_len;i++){ 00564 avio_r8(pb); // skip the name 00565 } 00566 00567 for(i=0;i<count;i++){ 00568 int64_t pres_time; 00569 int name_len; 00570 00571 avio_rl64(pb); // offset, 8 bytes 00572 pres_time = avio_rl64(pb); // presentation time 00573 avio_rl16(pb); // entry length 00574 avio_rl32(pb); // send time 00575 avio_rl32(pb); // flags 00576 name_len = avio_rl32(pb); // name length 00577 if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len) 00578 avio_skip(pb, name_len - ret); 00579 ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name ); 00580 } 00581 00582 return 0; 00583 } 00584 00585 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap) 00586 { 00587 ASFContext *asf = s->priv_data; 00588 ff_asf_guid g; 00589 AVIOContext *pb = s->pb; 00590 int i; 00591 int64_t gsize; 00592 00593 ff_get_guid(pb, &g); 00594 if (ff_guidcmp(&g, &ff_asf_header)) 00595 return -1; 00596 avio_rl64(pb); 00597 avio_rl32(pb); 00598 avio_r8(pb); 00599 avio_r8(pb); 00600 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid)); 00601 for(;;) { 00602 uint64_t gpos= avio_tell(pb); 00603 ff_get_guid(pb, &g); 00604 gsize = avio_rl64(pb); 00605 av_dlog(s, "%08"PRIx64": ", gpos); 00606 print_guid(&g); 00607 av_dlog(s, " size=0x%"PRIx64"\n", gsize); 00608 if (!ff_guidcmp(&g, &ff_asf_data_header)) { 00609 asf->data_object_offset = avio_tell(pb); 00610 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file.. 00611 if (!(asf->hdr.flags & 0x01) && gsize >= 100) { 00612 asf->data_object_size = gsize - 24; 00613 } else { 00614 asf->data_object_size = (uint64_t)-1; 00615 } 00616 break; 00617 } 00618 if (gsize < 24) 00619 return -1; 00620 if (!ff_guidcmp(&g, &ff_asf_file_header)) { 00621 int ret = asf_read_file_properties(s, gsize); 00622 if (ret < 0) 00623 return ret; 00624 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) { 00625 asf_read_stream_properties(s, gsize); 00626 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) { 00627 asf_read_content_desc(s, gsize); 00628 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) { 00629 asf_read_language_list(s, gsize); 00630 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) { 00631 asf_read_ext_content_desc(s, gsize); 00632 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) { 00633 asf_read_metadata(s, gsize); 00634 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) { 00635 asf_read_ext_stream_properties(s, gsize); 00636 00637 // there could be a optional stream properties object to follow 00638 // if so the next iteration will pick it up 00639 continue; 00640 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) { 00641 ff_get_guid(pb, &g); 00642 avio_skip(pb, 6); 00643 continue; 00644 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) { 00645 asf_read_marker(s, gsize); 00646 } else if (pb->eof_reached) { 00647 return -1; 00648 } else { 00649 if (!s->keylen) { 00650 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) { 00651 av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n"); 00652 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) { 00653 av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n"); 00654 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) { 00655 av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n"); 00656 } 00657 } 00658 } 00659 if(avio_tell(pb) != gpos + gsize) 00660 av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", avio_tell(pb)-gpos, gsize); 00661 avio_seek(pb, gpos + gsize, SEEK_SET); 00662 } 00663 ff_get_guid(pb, &g); 00664 avio_rl64(pb); 00665 avio_r8(pb); 00666 avio_r8(pb); 00667 if (pb->eof_reached) 00668 return -1; 00669 asf->data_offset = avio_tell(pb); 00670 asf->packet_size_left = 0; 00671 00672 00673 for(i=0; i<128; i++){ 00674 int stream_num= asf->asfid2avid[i]; 00675 if(stream_num>=0){ 00676 AVStream *st = s->streams[stream_num]; 00677 if (!st->codec->bit_rate) 00678 st->codec->bit_rate = asf->stream_bitrates[i]; 00679 if (asf->dar[i].num > 0 && asf->dar[i].den > 0){ 00680 av_reduce(&st->sample_aspect_ratio.num, 00681 &st->sample_aspect_ratio.den, 00682 asf->dar[i].num, asf->dar[i].den, INT_MAX); 00683 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) && (st->codec->codec_type==AVMEDIA_TYPE_VIDEO)) // Use ASF container value if the stream doesn't AR set. 00684 av_reduce(&st->sample_aspect_ratio.num, 00685 &st->sample_aspect_ratio.den, 00686 asf->dar[0].num, asf->dar[0].den, INT_MAX); 00687 00688 //av_log(s, AV_LOG_INFO, "i=%d, st->codec->codec_type:%d, dar %d:%d sar=%d:%d\n", i, st->codec->codec_type, dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den); 00689 00690 // copy and convert language codes to the frontend 00691 if (asf->streams[i].stream_language_index < 128) { 00692 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index]; 00693 if (rfc1766 && strlen(rfc1766) > 1) { 00694 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any 00695 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL); 00696 if (iso6392) 00697 av_dict_set(&st->metadata, "language", iso6392, 0); 00698 } 00699 } 00700 } 00701 } 00702 00703 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv); 00704 00705 return 0; 00706 } 00707 00708 #define DO_2BITS(bits, var, defval) \ 00709 switch (bits & 3) \ 00710 { \ 00711 case 3: var = avio_rl32(pb); rsize += 4; break; \ 00712 case 2: var = avio_rl16(pb); rsize += 2; break; \ 00713 case 1: var = avio_r8(pb); rsize++; break; \ 00714 default: var = defval; break; \ 00715 } 00716 00723 static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb) 00724 { 00725 ASFContext *asf = s->priv_data; 00726 uint32_t packet_length, padsize; 00727 int rsize = 8; 00728 int c, d, e, off; 00729 00730 // if we do not know packet size, allow skipping up to 32 kB 00731 off= 32768; 00732 if (s->packet_size > 0) 00733 off= (avio_tell(pb) - s->data_offset) % s->packet_size + 3; 00734 00735 c=d=e=-1; 00736 while(off-- > 0){ 00737 c=d; d=e; 00738 e= avio_r8(pb); 00739 if(c == 0x82 && !d && !e) 00740 break; 00741 } 00742 00743 if (c != 0x82) { 00750 if (pb->error == AVERROR(EAGAIN)) 00751 return AVERROR(EAGAIN); 00752 if (!pb->eof_reached) 00753 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb)); 00754 } 00755 if ((c & 0x8f) == 0x82) { 00756 if (d || e) { 00757 if (!pb->eof_reached) 00758 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n"); 00759 return -1; 00760 } 00761 c= avio_r8(pb); 00762 d= avio_r8(pb); 00763 rsize+=3; 00764 } else if (!pb->eof_reached) { 00765 avio_seek(pb, -1, SEEK_CUR); //FIXME 00766 } 00767 00768 asf->packet_flags = c; 00769 asf->packet_property = d; 00770 00771 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size); 00772 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored 00773 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length 00774 00775 //the following checks prevent overflows and infinite loops 00776 if(!packet_length || packet_length >= (1U<<29)){ 00777 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, avio_tell(pb)); 00778 return -1; 00779 } 00780 if(padsize >= packet_length){ 00781 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb)); 00782 return -1; 00783 } 00784 00785 asf->packet_timestamp = avio_rl32(pb); 00786 avio_rl16(pb); /* duration */ 00787 // rsize has at least 11 bytes which have to be present 00788 00789 if (asf->packet_flags & 0x01) { 00790 asf->packet_segsizetype = avio_r8(pb); rsize++; 00791 asf->packet_segments = asf->packet_segsizetype & 0x3f; 00792 } else { 00793 asf->packet_segments = 1; 00794 asf->packet_segsizetype = 0x80; 00795 } 00796 if (rsize > packet_length - padsize) { 00797 asf->packet_size_left = 0; 00798 av_log(s, AV_LOG_ERROR, 00799 "invalid packet header length %d for pktlen %d-%d at %"PRId64"\n", 00800 rsize, packet_length, padsize, avio_tell(pb)); 00801 return -1; 00802 } 00803 asf->packet_size_left = packet_length - padsize - rsize; 00804 if (packet_length < asf->hdr.min_pktsize) 00805 padsize += asf->hdr.min_pktsize - packet_length; 00806 asf->packet_padsize = padsize; 00807 av_dlog(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left); 00808 return 0; 00809 } 00810 00815 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){ 00816 ASFContext *asf = s->priv_data; 00817 int rsize = 1; 00818 int num = avio_r8(pb); 00819 int64_t ts0; 00820 00821 asf->packet_segments--; 00822 asf->packet_key_frame = num >> 7; 00823 asf->stream_index = asf->asfid2avid[num & 0x7f]; 00824 // sequence should be ignored! 00825 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0); 00826 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0); 00827 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0); 00828 //printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size); 00829 if (asf->packet_replic_size >= 8) { 00830 asf->packet_obj_size = avio_rl32(pb); 00831 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){ 00832 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n"); 00833 return -1; 00834 } 00835 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp 00836 if(asf->packet_replic_size >= 8+38+4){ 00837 // for(i=0; i<asf->packet_replic_size-8; i++) 00838 // av_log(s, AV_LOG_DEBUG, "%02X ",avio_r8(pb)); 00839 // av_log(s, AV_LOG_DEBUG, "\n"); 00840 avio_skip(pb, 10); 00841 ts0= avio_rl64(pb); 00842 avio_skip(pb, 8);; 00843 avio_skip(pb, 12); 00844 avio_rl32(pb); 00845 avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4); 00846 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000; 00847 else asf->packet_frag_timestamp= AV_NOPTS_VALUE; 00848 }else 00849 avio_skip(pb, asf->packet_replic_size - 8); 00850 rsize += asf->packet_replic_size; // FIXME - check validity 00851 } else if (asf->packet_replic_size==1){ 00852 // multipacket - frag_offset is beginning timestamp 00853 asf->packet_time_start = asf->packet_frag_offset; 00854 asf->packet_frag_offset = 0; 00855 asf->packet_frag_timestamp = asf->packet_timestamp; 00856 00857 asf->packet_time_delta = avio_r8(pb); 00858 rsize++; 00859 }else if(asf->packet_replic_size!=0){ 00860 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size); 00861 return -1; 00862 } 00863 if (asf->packet_flags & 0x01) { 00864 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal 00865 if (rsize > asf->packet_size_left) { 00866 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n"); 00867 return -1; 00868 } else if(asf->packet_frag_size > asf->packet_size_left - rsize){ 00869 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) { 00870 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n", asf->packet_size_left, rsize); 00871 return -1; 00872 } else { 00873 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize); 00874 asf->packet_size_left += diff; 00875 asf->packet_padsize -= diff; 00876 } 00877 } 00878 //printf("Fragsize %d\n", asf->packet_frag_size); 00879 } else { 00880 if (rsize > asf->packet_size_left) { 00881 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n"); 00882 return -1; 00883 } 00884 asf->packet_frag_size = asf->packet_size_left - rsize; 00885 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize); 00886 } 00887 if (asf->packet_replic_size == 1) { 00888 asf->packet_multi_size = asf->packet_frag_size; 00889 if (asf->packet_multi_size > asf->packet_size_left) 00890 return -1; 00891 } 00892 asf->packet_size_left -= rsize; 00893 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize); 00894 00895 return 0; 00896 } 00897 00907 static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) 00908 { 00909 ASFContext *asf = s->priv_data; 00910 ASFStream *asf_st = 0; 00911 for (;;) { 00912 int ret; 00913 if(pb->eof_reached) 00914 return AVERROR_EOF; 00915 if (asf->packet_size_left < FRAME_HEADER_SIZE 00916 || asf->packet_segments < 1) { 00917 //asf->packet_size_left <= asf->packet_padsize) { 00918 int ret = asf->packet_size_left + asf->packet_padsize; 00919 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, avio_tell(pb)); 00920 assert(ret>=0); 00921 /* fail safe */ 00922 avio_skip(pb, ret); 00923 00924 asf->packet_pos= avio_tell(pb); 00925 if (asf->data_object_size != (uint64_t)-1 && 00926 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size)) 00927 return AVERROR_EOF; /* Do not exceed the size of the data object */ 00928 return 1; 00929 } 00930 if (asf->packet_time_start == 0) { 00931 if(asf_read_frame_header(s, pb) < 0){ 00932 asf->packet_segments= 0; 00933 continue; 00934 } 00935 if (asf->stream_index < 0 00936 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL 00937 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY) 00938 ) { 00939 asf->packet_time_start = 0; 00940 /* unhandled packet (should not happen) */ 00941 avio_skip(pb, asf->packet_frag_size); 00942 asf->packet_size_left -= asf->packet_frag_size; 00943 if(asf->stream_index < 0) 00944 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size); 00945 continue; 00946 } 00947 asf->asf_st = s->streams[asf->stream_index]->priv_data; 00948 } 00949 asf_st = asf->asf_st; 00950 00951 if (asf->packet_replic_size == 1) { 00952 // frag_offset is here used as the beginning timestamp 00953 asf->packet_frag_timestamp = asf->packet_time_start; 00954 asf->packet_time_start += asf->packet_time_delta; 00955 asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb); 00956 asf->packet_size_left--; 00957 asf->packet_multi_size--; 00958 if (asf->packet_multi_size < asf->packet_obj_size) 00959 { 00960 asf->packet_time_start = 0; 00961 avio_skip(pb, asf->packet_multi_size); 00962 asf->packet_size_left -= asf->packet_multi_size; 00963 continue; 00964 } 00965 asf->packet_multi_size -= asf->packet_obj_size; 00966 //printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size); 00967 } 00968 if( /*asf->packet_frag_size == asf->packet_obj_size*/ 00969 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size 00970 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){ 00971 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n", 00972 asf_st->frag_offset, asf->packet_frag_size, 00973 asf->packet_obj_size, asf_st->pkt.size); 00974 asf->packet_obj_size= asf_st->pkt.size; 00975 } 00976 00977 if ( asf_st->pkt.size != asf->packet_obj_size 00978 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient? 00979 if(asf_st->pkt.data){ 00980 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size); 00981 asf_st->frag_offset = 0; 00982 av_free_packet(&asf_st->pkt); 00983 } 00984 /* new packet */ 00985 av_new_packet(&asf_st->pkt, asf->packet_obj_size); 00986 asf_st->seq = asf->packet_seq; 00987 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll; 00988 asf_st->pkt.stream_index = asf->stream_index; 00989 asf_st->pkt.pos = 00990 asf_st->packet_pos= asf->packet_pos; 00991 if (asf_st->pkt.data && asf_st->palette_changed) { 00992 uint8_t *pal; 00993 pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, 00994 AVPALETTE_SIZE); 00995 if (!pal) { 00996 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n"); 00997 } else { 00998 memcpy(pal, asf_st->palette, AVPALETTE_SIZE); 00999 asf_st->palette_changed = 0; 01000 } 01001 } 01002 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n", 01003 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY, 01004 //s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size); 01005 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO) 01006 asf->packet_key_frame = 1; 01007 if (asf->packet_key_frame) 01008 asf_st->pkt.flags |= AV_PKT_FLAG_KEY; 01009 } 01010 01011 /* read data */ 01012 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n", 01013 // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset, 01014 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data); 01015 asf->packet_size_left -= asf->packet_frag_size; 01016 if (asf->packet_size_left < 0) 01017 continue; 01018 01019 if( asf->packet_frag_offset >= asf_st->pkt.size 01020 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){ 01021 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n", 01022 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size); 01023 continue; 01024 } 01025 01026 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset, 01027 asf->packet_frag_size); 01028 if (ret != asf->packet_frag_size) { 01029 if (ret < 0 || asf->packet_frag_offset + ret == 0) 01030 return ret < 0 ? ret : AVERROR_EOF; 01031 if (asf_st->ds_span > 1) { 01032 // scrambling, we can either drop it completely or fill the remainder 01033 // TODO: should we fill the whole packet instead of just the current 01034 // fragment? 01035 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0, 01036 asf->packet_frag_size - ret); 01037 ret = asf->packet_frag_size; 01038 } else 01039 // no scrambling, so we can return partial packets 01040 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret); 01041 } 01042 if (s->key && s->keylen == 20) 01043 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset, 01044 ret); 01045 asf_st->frag_offset += ret; 01046 /* test if whole packet is read */ 01047 if (asf_st->frag_offset == asf_st->pkt.size) { 01048 //workaround for macroshit radio DVR-MS files 01049 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO 01050 && asf_st->pkt.size > 100){ 01051 int i; 01052 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++); 01053 if(i == asf_st->pkt.size){ 01054 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n"); 01055 asf_st->frag_offset = 0; 01056 av_free_packet(&asf_st->pkt); 01057 continue; 01058 } 01059 } 01060 01061 /* return packet */ 01062 if (asf_st->ds_span > 1) { 01063 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){ 01064 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span); 01065 }else{ 01066 /* packet descrambling */ 01067 uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE); 01068 if (newdata) { 01069 int offset = 0; 01070 memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE); 01071 while (offset < asf_st->pkt.size) { 01072 int off = offset / asf_st->ds_chunk_size; 01073 int row = off / asf_st->ds_span; 01074 int col = off % asf_st->ds_span; 01075 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size; 01076 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx); 01077 01078 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size); 01079 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size); 01080 memcpy(newdata + offset, 01081 asf_st->pkt.data + idx * asf_st->ds_chunk_size, 01082 asf_st->ds_chunk_size); 01083 offset += asf_st->ds_chunk_size; 01084 } 01085 av_free(asf_st->pkt.data); 01086 asf_st->pkt.data = newdata; 01087 } 01088 } 01089 } 01090 asf_st->frag_offset = 0; 01091 *pkt= asf_st->pkt; 01092 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size); 01093 asf_st->pkt.size = 0; 01094 asf_st->pkt.data = 0; 01095 break; // packet completed 01096 } 01097 } 01098 return 0; 01099 } 01100 01101 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt) 01102 { 01103 ASFContext *asf = s->priv_data; 01104 01105 for (;;) { 01106 int ret; 01107 01108 /* parse cached packets, if any */ 01109 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0) 01110 return ret; 01111 if ((ret = ff_asf_get_packet(s, s->pb)) < 0) 01112 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1); 01113 asf->packet_time_start = 0; 01114 } 01115 01116 return 0; 01117 } 01118 01119 // Added to support seeking after packets have been read 01120 // If information is not reset, read_packet fails due to 01121 // leftover information from previous reads 01122 static void asf_reset_header(AVFormatContext *s) 01123 { 01124 ASFContext *asf = s->priv_data; 01125 ASFStream *asf_st; 01126 int i; 01127 01128 asf->packet_size_left = 0; 01129 asf->packet_segments = 0; 01130 asf->packet_flags = 0; 01131 asf->packet_property = 0; 01132 asf->packet_timestamp = 0; 01133 asf->packet_segsizetype = 0; 01134 asf->packet_segments = 0; 01135 asf->packet_seq = 0; 01136 asf->packet_replic_size = 0; 01137 asf->packet_key_frame = 0; 01138 asf->packet_padsize = 0; 01139 asf->packet_frag_offset = 0; 01140 asf->packet_frag_size = 0; 01141 asf->packet_frag_timestamp = 0; 01142 asf->packet_multi_size = 0; 01143 asf->packet_obj_size = 0; 01144 asf->packet_time_delta = 0; 01145 asf->packet_time_start = 0; 01146 01147 for(i=0; i<s->nb_streams; i++){ 01148 asf_st= s->streams[i]->priv_data; 01149 av_free_packet(&asf_st->pkt); 01150 asf_st->frag_offset=0; 01151 asf_st->seq=0; 01152 } 01153 asf->asf_st= NULL; 01154 } 01155 01156 static int asf_read_close(AVFormatContext *s) 01157 { 01158 asf_reset_header(s); 01159 01160 return 0; 01161 } 01162 01163 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit) 01164 { 01165 AVPacket pkt1, *pkt = &pkt1; 01166 ASFStream *asf_st; 01167 int64_t pts; 01168 int64_t pos= *ppos; 01169 int i; 01170 int64_t start_pos[ASF_MAX_STREAMS]; 01171 01172 for(i=0; i<s->nb_streams; i++){ 01173 start_pos[i]= pos; 01174 } 01175 01176 if (s->packet_size > 0) 01177 pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset; 01178 *ppos= pos; 01179 avio_seek(s->pb, pos, SEEK_SET); 01180 01181 //printf("asf_read_pts\n"); 01182 asf_reset_header(s); 01183 for(;;){ 01184 if (av_read_frame(s, pkt) < 0){ 01185 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n"); 01186 return AV_NOPTS_VALUE; 01187 } 01188 01189 pts= pkt->pts; 01190 01191 av_free_packet(pkt); 01192 if(pkt->flags&AV_PKT_FLAG_KEY){ 01193 i= pkt->stream_index; 01194 01195 asf_st= s->streams[i]->priv_data; 01196 01197 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0); 01198 pos= asf_st->packet_pos; 01199 01200 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME); 01201 start_pos[i]= asf_st->packet_pos + 1; 01202 01203 if(pkt->stream_index == stream_index) 01204 break; 01205 } 01206 } 01207 01208 *ppos= pos; 01209 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts); 01210 01211 return pts; 01212 } 01213 01214 static void asf_build_simple_index(AVFormatContext *s, int stream_index) 01215 { 01216 ff_asf_guid g; 01217 ASFContext *asf = s->priv_data; 01218 int64_t current_pos= avio_tell(s->pb); 01219 int i; 01220 01221 avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET); 01222 ff_get_guid(s->pb, &g); 01223 01224 /* the data object can be followed by other top-level objects, 01225 skip them until the simple index object is reached */ 01226 while (ff_guidcmp(&g, &index_guid)) { 01227 int64_t gsize= avio_rl64(s->pb); 01228 if (gsize < 24 || s->pb->eof_reached) { 01229 avio_seek(s->pb, current_pos, SEEK_SET); 01230 return; 01231 } 01232 avio_skip(s->pb, gsize-24); 01233 ff_get_guid(s->pb, &g); 01234 } 01235 01236 { 01237 int64_t itime, last_pos=-1; 01238 int pct, ict; 01239 int64_t av_unused gsize= avio_rl64(s->pb); 01240 ff_get_guid(s->pb, &g); 01241 itime=avio_rl64(s->pb); 01242 pct=avio_rl32(s->pb); 01243 ict=avio_rl32(s->pb); 01244 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict); 01245 01246 for (i=0;i<ict;i++){ 01247 int pktnum=avio_rl32(s->pb); 01248 int pktct =avio_rl16(s->pb); 01249 int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum; 01250 int64_t index_pts= FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0); 01251 01252 if(pos != last_pos){ 01253 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n", pktnum, pktct, index_pts); 01254 av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME); 01255 last_pos=pos; 01256 } 01257 } 01258 asf->index_read= 1; 01259 } 01260 avio_seek(s->pb, current_pos, SEEK_SET); 01261 } 01262 01263 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags) 01264 { 01265 ASFContext *asf = s->priv_data; 01266 AVStream *st = s->streams[stream_index]; 01267 int64_t pos; 01268 int index; 01269 01270 if (s->packet_size <= 0) 01271 return -1; 01272 01273 /* Try using the protocol's read_seek if available */ 01274 if(s->pb) { 01275 int ret = avio_seek_time(s->pb, stream_index, pts, flags); 01276 if(ret >= 0) 01277 asf_reset_header(s); 01278 if (ret != AVERROR(ENOSYS)) 01279 return ret; 01280 } 01281 01282 if (!asf->index_read) 01283 asf_build_simple_index(s, stream_index); 01284 01285 if((asf->index_read && st->index_entries)){ 01286 index= av_index_search_timestamp(st, pts, flags); 01287 if(index >= 0) { 01288 /* find the position */ 01289 pos = st->index_entries[index].pos; 01290 01291 /* do the seek */ 01292 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos); 01293 avio_seek(s->pb, pos, SEEK_SET); 01294 asf_reset_header(s); 01295 return 0; 01296 } 01297 } 01298 /* no index or seeking by index failed */ 01299 if(av_seek_frame_binary(s, stream_index, pts, flags)<0) 01300 return -1; 01301 asf_reset_header(s); 01302 return 0; 01303 } 01304 01305 AVInputFormat ff_asf_demuxer = { 01306 "asf", 01307 NULL_IF_CONFIG_SMALL("ASF format"), 01308 sizeof(ASFContext), 01309 asf_probe, 01310 asf_read_header, 01311 asf_read_packet, 01312 asf_read_close, 01313 asf_read_seek, 01314 asf_read_pts, 01315 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH, 01316 };