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 asf->hdr.max_bitrate = avio_rl32(pb); 00206 s->packet_size = asf->hdr.max_pktsize; 00207 00208 return 0; 00209 } 00210 00211 static int asf_read_stream_properties(AVFormatContext *s, int64_t size) 00212 { 00213 ASFContext *asf = s->priv_data; 00214 AVIOContext *pb = s->pb; 00215 AVStream *st; 00216 ASFStream *asf_st; 00217 ff_asf_guid g; 00218 enum AVMediaType type; 00219 int type_specific_size, sizeX; 00220 unsigned int tag1; 00221 int64_t pos1, pos2, start_time; 00222 int test_for_ext_stream_audio, is_dvr_ms_audio=0; 00223 00224 if (s->nb_streams == ASF_MAX_STREAMS) { 00225 av_log(s, AV_LOG_ERROR, "too many streams\n"); 00226 return AVERROR(EINVAL); 00227 } 00228 00229 pos1 = avio_tell(pb); 00230 00231 st = av_new_stream(s, 0); 00232 if (!st) 00233 return AVERROR(ENOMEM); 00234 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ 00235 asf_st = av_mallocz(sizeof(ASFStream)); 00236 if (!asf_st) 00237 return AVERROR(ENOMEM); 00238 st->priv_data = asf_st; 00239 st->start_time = 0; 00240 start_time = asf->hdr.preroll; 00241 00242 asf_st->stream_language_index = 128; // invalid stream index means no language info 00243 00244 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming... 00245 st->duration = asf->hdr.play_time / 00246 (10000000 / 1000) - start_time; 00247 } 00248 ff_get_guid(pb, &g); 00249 00250 test_for_ext_stream_audio = 0; 00251 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) { 00252 type = AVMEDIA_TYPE_AUDIO; 00253 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) { 00254 type = AVMEDIA_TYPE_VIDEO; 00255 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) { 00256 type = AVMEDIA_TYPE_VIDEO; 00257 st->codec->codec_id = CODEC_ID_MJPEG; 00258 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) { 00259 type = AVMEDIA_TYPE_DATA; 00260 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) { 00261 test_for_ext_stream_audio = 1; 00262 type = AVMEDIA_TYPE_UNKNOWN; 00263 } else { 00264 return -1; 00265 } 00266 ff_get_guid(pb, &g); 00267 avio_skip(pb, 8); /* total_size */ 00268 type_specific_size = avio_rl32(pb); 00269 avio_rl32(pb); 00270 st->id = avio_rl16(pb) & 0x7f; /* stream id */ 00271 // mapping of asf ID to AV stream ID; 00272 asf->asfid2avid[st->id] = s->nb_streams - 1; 00273 00274 avio_rl32(pb); 00275 00276 if (test_for_ext_stream_audio) { 00277 ff_get_guid(pb, &g); 00278 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) { 00279 type = AVMEDIA_TYPE_AUDIO; 00280 is_dvr_ms_audio=1; 00281 ff_get_guid(pb, &g); 00282 avio_rl32(pb); 00283 avio_rl32(pb); 00284 avio_rl32(pb); 00285 ff_get_guid(pb, &g); 00286 avio_rl32(pb); 00287 } 00288 } 00289 00290 st->codec->codec_type = type; 00291 if (type == AVMEDIA_TYPE_AUDIO) { 00292 int ret = ff_get_wav_header(pb, st->codec, type_specific_size); 00293 if (ret < 0) 00294 return ret; 00295 if (is_dvr_ms_audio) { 00296 // codec_id and codec_tag are unreliable in dvr_ms 00297 // files. Set them later by probing stream. 00298 st->codec->codec_id = CODEC_ID_PROBE; 00299 st->codec->codec_tag = 0; 00300 } 00301 if (st->codec->codec_id == CODEC_ID_AAC) { 00302 st->need_parsing = AVSTREAM_PARSE_NONE; 00303 } else { 00304 st->need_parsing = AVSTREAM_PARSE_FULL; 00305 } 00306 /* We have to init the frame size at some point .... */ 00307 pos2 = avio_tell(pb); 00308 if (size >= (pos2 + 8 - pos1 + 24)) { 00309 asf_st->ds_span = avio_r8(pb); 00310 asf_st->ds_packet_size = avio_rl16(pb); 00311 asf_st->ds_chunk_size = avio_rl16(pb); 00312 avio_rl16(pb); //ds_data_size 00313 avio_r8(pb); //ds_silence_data 00314 } 00315 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n", 00316 // asf_st->ds_packet_size, asf_st->ds_chunk_size, 00317 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data); 00318 if (asf_st->ds_span > 1) { 00319 if (!asf_st->ds_chunk_size 00320 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1) 00321 || asf_st->ds_packet_size % asf_st->ds_chunk_size) 00322 asf_st->ds_span = 0; // disable descrambling 00323 } 00324 switch (st->codec->codec_id) { 00325 case CODEC_ID_MP3: 00326 st->codec->frame_size = MPA_FRAME_SIZE; 00327 break; 00328 case CODEC_ID_PCM_S16LE: 00329 case CODEC_ID_PCM_S16BE: 00330 case CODEC_ID_PCM_U16LE: 00331 case CODEC_ID_PCM_U16BE: 00332 case CODEC_ID_PCM_S8: 00333 case CODEC_ID_PCM_U8: 00334 case CODEC_ID_PCM_ALAW: 00335 case CODEC_ID_PCM_MULAW: 00336 st->codec->frame_size = 1; 00337 break; 00338 default: 00339 /* This is probably wrong, but it prevents a crash later */ 00340 st->codec->frame_size = 1; 00341 break; 00342 } 00343 } else if (type == AVMEDIA_TYPE_VIDEO && 00344 size - (avio_tell(pb) - pos1 + 24) >= 51) { 00345 avio_rl32(pb); 00346 avio_rl32(pb); 00347 avio_r8(pb); 00348 avio_rl16(pb); /* size */ 00349 sizeX= avio_rl32(pb); /* size */ 00350 st->codec->width = avio_rl32(pb); 00351 st->codec->height = avio_rl32(pb); 00352 /* not available for asf */ 00353 avio_rl16(pb); /* panes */ 00354 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */ 00355 tag1 = avio_rl32(pb); 00356 avio_skip(pb, 20); 00357 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX); 00358 if (sizeX > 40) { 00359 st->codec->extradata_size = sizeX - 40; 00360 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); 00361 avio_read(pb, st->codec->extradata, st->codec->extradata_size); 00362 } 00363 00364 /* Extract palette from extradata if bpp <= 8 */ 00365 /* This code assumes that extradata contains only palette */ 00366 /* This is true for all paletted codecs implemented in ffmpeg */ 00367 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) { 00368 int av_unused i; 00369 #if HAVE_BIGENDIAN 00370 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++) 00371 asf_st->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]); 00372 #else 00373 memcpy(asf_st->palette, st->codec->extradata, 00374 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)); 00375 #endif 00376 asf_st->palette_changed = 1; 00377 } 00378 00379 st->codec->codec_tag = tag1; 00380 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1); 00381 if(tag1 == MKTAG('D', 'V', 'R', ' ')){ 00382 st->need_parsing = AVSTREAM_PARSE_FULL; 00383 // 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 00384 st->codec->width = 00385 st->codec->height = 0; 00386 av_freep(&st->codec->extradata); 00387 st->codec->extradata_size=0; 00388 } 00389 if(st->codec->codec_id == CODEC_ID_H264) 00390 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE; 00391 } 00392 pos2 = avio_tell(pb); 00393 avio_skip(pb, size - (pos2 - pos1 + 24)); 00394 00395 return 0; 00396 } 00397 00398 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size) 00399 { 00400 ASFContext *asf = s->priv_data; 00401 AVIOContext *pb = s->pb; 00402 ff_asf_guid g; 00403 int ext_len, payload_ext_ct, stream_ct, i; 00404 uint32_t leak_rate, stream_num; 00405 unsigned int stream_languageid_index; 00406 00407 avio_rl64(pb); // starttime 00408 avio_rl64(pb); // endtime 00409 leak_rate = avio_rl32(pb); // leak-datarate 00410 avio_rl32(pb); // bucket-datasize 00411 avio_rl32(pb); // init-bucket-fullness 00412 avio_rl32(pb); // alt-leak-datarate 00413 avio_rl32(pb); // alt-bucket-datasize 00414 avio_rl32(pb); // alt-init-bucket-fullness 00415 avio_rl32(pb); // max-object-size 00416 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved) 00417 stream_num = avio_rl16(pb); // stream-num 00418 00419 stream_languageid_index = avio_rl16(pb); // stream-language-id-index 00420 if (stream_num < 128) 00421 asf->streams[stream_num].stream_language_index = stream_languageid_index; 00422 00423 avio_rl64(pb); // avg frametime in 100ns units 00424 stream_ct = avio_rl16(pb); //stream-name-count 00425 payload_ext_ct = avio_rl16(pb); //payload-extension-system-count 00426 00427 if (stream_num < 128) 00428 asf->stream_bitrates[stream_num] = leak_rate; 00429 00430 for (i=0; i<stream_ct; i++){ 00431 avio_rl16(pb); 00432 ext_len = avio_rl16(pb); 00433 avio_skip(pb, ext_len); 00434 } 00435 00436 for (i=0; i<payload_ext_ct; i++){ 00437 ff_get_guid(pb, &g); 00438 avio_skip(pb, 2); 00439 ext_len=avio_rl32(pb); 00440 avio_skip(pb, ext_len); 00441 } 00442 00443 return 0; 00444 } 00445 00446 static int asf_read_content_desc(AVFormatContext *s, int64_t size) 00447 { 00448 AVIOContext *pb = s->pb; 00449 int len1, len2, len3, len4, len5; 00450 00451 len1 = avio_rl16(pb); 00452 len2 = avio_rl16(pb); 00453 len3 = avio_rl16(pb); 00454 len4 = avio_rl16(pb); 00455 len5 = avio_rl16(pb); 00456 get_tag(s, "title" , 0, len1); 00457 get_tag(s, "author" , 0, len2); 00458 get_tag(s, "copyright", 0, len3); 00459 get_tag(s, "comment" , 0, len4); 00460 avio_skip(pb, len5); 00461 00462 return 0; 00463 } 00464 00465 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size) 00466 { 00467 AVIOContext *pb = s->pb; 00468 ASFContext *asf = s->priv_data; 00469 int desc_count, i, ret; 00470 00471 desc_count = avio_rl16(pb); 00472 for(i=0;i<desc_count;i++) { 00473 int name_len,value_type,value_len; 00474 char name[1024]; 00475 00476 name_len = avio_rl16(pb); 00477 if (name_len%2) // must be even, broken lavf versions wrote len-1 00478 name_len += 1; 00479 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len) 00480 avio_skip(pb, name_len - ret); 00481 value_type = avio_rl16(pb); 00482 value_len = avio_rl16(pb); 00483 if (!value_type && value_len%2) 00484 value_len += 1; 00489 if (!strcmp(name, "AspectRatioX")){ 00490 asf->dar[0].num= get_value(s->pb, value_type); 00491 } else if(!strcmp(name, "AspectRatioY")){ 00492 asf->dar[0].den= get_value(s->pb, value_type); 00493 } else 00494 get_tag(s, name, value_type, value_len); 00495 } 00496 00497 return 0; 00498 } 00499 00500 static int asf_read_language_list(AVFormatContext *s, int64_t size) 00501 { 00502 AVIOContext *pb = s->pb; 00503 ASFContext *asf = s->priv_data; 00504 int j, ret; 00505 int stream_count = avio_rl16(pb); 00506 for(j = 0; j < stream_count; j++) { 00507 char lang[6]; 00508 unsigned int lang_len = avio_r8(pb); 00509 if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len) 00510 avio_skip(pb, lang_len - ret); 00511 if (j < 128) 00512 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages)); 00513 } 00514 00515 return 0; 00516 } 00517 00518 static int asf_read_metadata(AVFormatContext *s, int64_t size) 00519 { 00520 AVIOContext *pb = s->pb; 00521 ASFContext *asf = s->priv_data; 00522 int n, stream_num, name_len, value_len, value_num; 00523 int ret, i; 00524 n = avio_rl16(pb); 00525 00526 for(i=0;i<n;i++) { 00527 char name[1024]; 00528 00529 avio_rl16(pb); //lang_list_index 00530 stream_num= avio_rl16(pb); 00531 name_len= avio_rl16(pb); 00532 avio_skip(pb, 2); /* value_type */ 00533 value_len= avio_rl32(pb); 00534 00535 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len) 00536 avio_skip(pb, name_len - ret); 00537 //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name); 00538 value_num= avio_rl16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere 00539 avio_skip(pb, value_len - 2); 00540 00541 if(stream_num<128){ 00542 if (!strcmp(name, "AspectRatioX")) asf->dar[stream_num].num= value_num; 00543 else if(!strcmp(name, "AspectRatioY")) asf->dar[stream_num].den= value_num; 00544 } 00545 } 00546 00547 return 0; 00548 } 00549 00550 static int asf_read_marker(AVFormatContext *s, int64_t size) 00551 { 00552 AVIOContext *pb = s->pb; 00553 int i, count, name_len, ret; 00554 char name[1024]; 00555 00556 avio_rl64(pb); // reserved 16 bytes 00557 avio_rl64(pb); // ... 00558 count = avio_rl32(pb); // markers count 00559 avio_rl16(pb); // reserved 2 bytes 00560 name_len = avio_rl16(pb); // name length 00561 for(i=0;i<name_len;i++){ 00562 avio_r8(pb); // skip the name 00563 } 00564 00565 for(i=0;i<count;i++){ 00566 int64_t pres_time; 00567 int name_len; 00568 00569 avio_rl64(pb); // offset, 8 bytes 00570 pres_time = avio_rl64(pb); // presentation time 00571 avio_rl16(pb); // entry length 00572 avio_rl32(pb); // send time 00573 avio_rl32(pb); // flags 00574 name_len = avio_rl32(pb); // name length 00575 if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len) 00576 avio_skip(pb, name_len - ret); 00577 ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name ); 00578 } 00579 00580 return 0; 00581 } 00582 00583 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap) 00584 { 00585 ASFContext *asf = s->priv_data; 00586 ff_asf_guid g; 00587 AVIOContext *pb = s->pb; 00588 int i; 00589 int64_t gsize; 00590 00591 ff_get_guid(pb, &g); 00592 if (ff_guidcmp(&g, &ff_asf_header)) 00593 return -1; 00594 avio_rl64(pb); 00595 avio_rl32(pb); 00596 avio_r8(pb); 00597 avio_r8(pb); 00598 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid)); 00599 for(;;) { 00600 uint64_t gpos= avio_tell(pb); 00601 ff_get_guid(pb, &g); 00602 gsize = avio_rl64(pb); 00603 av_dlog(s, "%08"PRIx64": ", gpos); 00604 print_guid(&g); 00605 av_dlog(s, " size=0x%"PRIx64"\n", gsize); 00606 if (!ff_guidcmp(&g, &ff_asf_data_header)) { 00607 asf->data_object_offset = avio_tell(pb); 00608 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file.. 00609 if (!(asf->hdr.flags & 0x01) && gsize >= 100) { 00610 asf->data_object_size = gsize - 24; 00611 } else { 00612 asf->data_object_size = (uint64_t)-1; 00613 } 00614 break; 00615 } 00616 if (gsize < 24) 00617 return -1; 00618 if (!ff_guidcmp(&g, &ff_asf_file_header)) { 00619 asf_read_file_properties(s, gsize); 00620 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) { 00621 asf_read_stream_properties(s, gsize); 00622 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) { 00623 asf_read_content_desc(s, gsize); 00624 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) { 00625 asf_read_language_list(s, gsize); 00626 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) { 00627 asf_read_ext_content_desc(s, gsize); 00628 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) { 00629 asf_read_metadata(s, gsize); 00630 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) { 00631 asf_read_ext_stream_properties(s, gsize); 00632 00633 // there could be a optional stream properties object to follow 00634 // if so the next iteration will pick it up 00635 continue; 00636 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) { 00637 ff_get_guid(pb, &g); 00638 avio_skip(pb, 6); 00639 continue; 00640 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) { 00641 asf_read_marker(s, gsize); 00642 } else if (pb->eof_reached) { 00643 return -1; 00644 } else { 00645 if (!s->keylen) { 00646 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) { 00647 av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n"); 00648 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) { 00649 av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n"); 00650 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) { 00651 av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n"); 00652 } 00653 } 00654 } 00655 if(avio_tell(pb) != gpos + gsize) 00656 av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", avio_tell(pb)-gpos, gsize); 00657 avio_seek(pb, gpos + gsize, SEEK_SET); 00658 } 00659 ff_get_guid(pb, &g); 00660 avio_rl64(pb); 00661 avio_r8(pb); 00662 avio_r8(pb); 00663 if (pb->eof_reached) 00664 return -1; 00665 asf->data_offset = avio_tell(pb); 00666 asf->packet_size_left = 0; 00667 00668 00669 for(i=0; i<128; i++){ 00670 int stream_num= asf->asfid2avid[i]; 00671 if(stream_num>=0){ 00672 AVStream *st = s->streams[stream_num]; 00673 if (!st->codec->bit_rate) 00674 st->codec->bit_rate = asf->stream_bitrates[i]; 00675 if (asf->dar[i].num > 0 && asf->dar[i].den > 0){ 00676 av_reduce(&st->sample_aspect_ratio.num, 00677 &st->sample_aspect_ratio.den, 00678 asf->dar[i].num, asf->dar[i].den, INT_MAX); 00679 } 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. 00680 av_reduce(&st->sample_aspect_ratio.num, 00681 &st->sample_aspect_ratio.den, 00682 asf->dar[0].num, asf->dar[0].den, INT_MAX); 00683 00684 //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); 00685 00686 // copy and convert language codes to the frontend 00687 if (asf->streams[i].stream_language_index < 128) { 00688 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index]; 00689 if (rfc1766 && strlen(rfc1766) > 1) { 00690 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any 00691 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL); 00692 if (iso6392) 00693 av_dict_set(&st->metadata, "language", iso6392, 0); 00694 } 00695 } 00696 } 00697 } 00698 00699 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv); 00700 00701 return 0; 00702 } 00703 00704 #define DO_2BITS(bits, var, defval) \ 00705 switch (bits & 3) \ 00706 { \ 00707 case 3: var = avio_rl32(pb); rsize += 4; break; \ 00708 case 2: var = avio_rl16(pb); rsize += 2; break; \ 00709 case 1: var = avio_r8(pb); rsize++; break; \ 00710 default: var = defval; break; \ 00711 } 00712 00719 static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb) 00720 { 00721 ASFContext *asf = s->priv_data; 00722 uint32_t packet_length, padsize; 00723 int rsize = 8; 00724 int c, d, e, off; 00725 00726 // if we do not know packet size, allow skipping up to 32 kB 00727 off= 32768; 00728 if (s->packet_size > 0) 00729 off= (avio_tell(pb) - s->data_offset) % s->packet_size + 3; 00730 00731 c=d=e=-1; 00732 while(off-- > 0){ 00733 c=d; d=e; 00734 e= avio_r8(pb); 00735 if(c == 0x82 && !d && !e) 00736 break; 00737 } 00738 00739 if (c != 0x82) { 00746 if (pb->error == AVERROR(EAGAIN)) 00747 return AVERROR(EAGAIN); 00748 if (!pb->eof_reached) 00749 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb)); 00750 } 00751 if ((c & 0x8f) == 0x82) { 00752 if (d || e) { 00753 if (!pb->eof_reached) 00754 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n"); 00755 return -1; 00756 } 00757 c= avio_r8(pb); 00758 d= avio_r8(pb); 00759 rsize+=3; 00760 }else{ 00761 avio_seek(pb, -1, SEEK_CUR); //FIXME 00762 } 00763 00764 asf->packet_flags = c; 00765 asf->packet_property = d; 00766 00767 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size); 00768 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored 00769 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length 00770 00771 //the following checks prevent overflows and infinite loops 00772 if(!packet_length || packet_length >= (1U<<29)){ 00773 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, avio_tell(pb)); 00774 return -1; 00775 } 00776 if(padsize >= packet_length){ 00777 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb)); 00778 return -1; 00779 } 00780 00781 asf->packet_timestamp = avio_rl32(pb); 00782 avio_rl16(pb); /* duration */ 00783 // rsize has at least 11 bytes which have to be present 00784 00785 if (asf->packet_flags & 0x01) { 00786 asf->packet_segsizetype = avio_r8(pb); rsize++; 00787 asf->packet_segments = asf->packet_segsizetype & 0x3f; 00788 } else { 00789 asf->packet_segments = 1; 00790 asf->packet_segsizetype = 0x80; 00791 } 00792 asf->packet_size_left = packet_length - padsize - rsize; 00793 if (packet_length < asf->hdr.min_pktsize) 00794 padsize += asf->hdr.min_pktsize - packet_length; 00795 asf->packet_padsize = padsize; 00796 av_dlog(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left); 00797 return 0; 00798 } 00799 00804 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){ 00805 ASFContext *asf = s->priv_data; 00806 int rsize = 1; 00807 int num = avio_r8(pb); 00808 int64_t ts0; 00809 00810 asf->packet_segments--; 00811 asf->packet_key_frame = num >> 7; 00812 asf->stream_index = asf->asfid2avid[num & 0x7f]; 00813 // sequence should be ignored! 00814 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0); 00815 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0); 00816 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0); 00817 //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); 00818 if (asf->packet_replic_size >= 8) { 00819 asf->packet_obj_size = avio_rl32(pb); 00820 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){ 00821 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n"); 00822 return -1; 00823 } 00824 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp 00825 if(asf->packet_replic_size >= 8+38+4){ 00826 // for(i=0; i<asf->packet_replic_size-8; i++) 00827 // av_log(s, AV_LOG_DEBUG, "%02X ",avio_r8(pb)); 00828 // av_log(s, AV_LOG_DEBUG, "\n"); 00829 avio_skip(pb, 10); 00830 ts0= avio_rl64(pb); 00831 avio_skip(pb, 8);; 00832 avio_skip(pb, 12); 00833 avio_rl32(pb); 00834 avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4); 00835 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000; 00836 else asf->packet_frag_timestamp= AV_NOPTS_VALUE; 00837 }else 00838 avio_skip(pb, asf->packet_replic_size - 8); 00839 rsize += asf->packet_replic_size; // FIXME - check validity 00840 } else if (asf->packet_replic_size==1){ 00841 // multipacket - frag_offset is beginning timestamp 00842 asf->packet_time_start = asf->packet_frag_offset; 00843 asf->packet_frag_offset = 0; 00844 asf->packet_frag_timestamp = asf->packet_timestamp; 00845 00846 asf->packet_time_delta = avio_r8(pb); 00847 rsize++; 00848 }else if(asf->packet_replic_size!=0){ 00849 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size); 00850 return -1; 00851 } 00852 if (asf->packet_flags & 0x01) { 00853 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal 00854 if (rsize > asf->packet_size_left) { 00855 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n"); 00856 return -1; 00857 } else if(asf->packet_frag_size > asf->packet_size_left - rsize){ 00858 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) { 00859 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n", asf->packet_size_left, rsize); 00860 return -1; 00861 } else { 00862 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize); 00863 asf->packet_size_left += diff; 00864 asf->packet_padsize -= diff; 00865 } 00866 } 00867 //printf("Fragsize %d\n", asf->packet_frag_size); 00868 } else { 00869 if (rsize > asf->packet_size_left) { 00870 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n"); 00871 return -1; 00872 } 00873 asf->packet_frag_size = asf->packet_size_left - rsize; 00874 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize); 00875 } 00876 if (asf->packet_replic_size == 1) { 00877 asf->packet_multi_size = asf->packet_frag_size; 00878 if (asf->packet_multi_size > asf->packet_size_left) 00879 return -1; 00880 } 00881 asf->packet_size_left -= rsize; 00882 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize); 00883 00884 return 0; 00885 } 00886 00896 static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) 00897 { 00898 ASFContext *asf = s->priv_data; 00899 ASFStream *asf_st = 0; 00900 for (;;) { 00901 int ret; 00902 if(pb->eof_reached) 00903 return AVERROR_EOF; 00904 if (asf->packet_size_left < FRAME_HEADER_SIZE 00905 || asf->packet_segments < 1) { 00906 //asf->packet_size_left <= asf->packet_padsize) { 00907 int ret = asf->packet_size_left + asf->packet_padsize; 00908 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, avio_tell(pb)); 00909 assert(ret>=0); 00910 /* fail safe */ 00911 avio_skip(pb, ret); 00912 00913 asf->packet_pos= avio_tell(pb); 00914 if (asf->data_object_size != (uint64_t)-1 && 00915 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size)) 00916 return AVERROR_EOF; /* Do not exceed the size of the data object */ 00917 return 1; 00918 } 00919 if (asf->packet_time_start == 0) { 00920 if(asf_read_frame_header(s, pb) < 0){ 00921 asf->packet_segments= 0; 00922 continue; 00923 } 00924 if (asf->stream_index < 0 00925 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL 00926 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY) 00927 ) { 00928 asf->packet_time_start = 0; 00929 /* unhandled packet (should not happen) */ 00930 avio_skip(pb, asf->packet_frag_size); 00931 asf->packet_size_left -= asf->packet_frag_size; 00932 if(asf->stream_index < 0) 00933 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size); 00934 continue; 00935 } 00936 asf->asf_st = s->streams[asf->stream_index]->priv_data; 00937 } 00938 asf_st = asf->asf_st; 00939 00940 if (asf->packet_replic_size == 1) { 00941 // frag_offset is here used as the beginning timestamp 00942 asf->packet_frag_timestamp = asf->packet_time_start; 00943 asf->packet_time_start += asf->packet_time_delta; 00944 asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb); 00945 asf->packet_size_left--; 00946 asf->packet_multi_size--; 00947 if (asf->packet_multi_size < asf->packet_obj_size) 00948 { 00949 asf->packet_time_start = 0; 00950 avio_skip(pb, asf->packet_multi_size); 00951 asf->packet_size_left -= asf->packet_multi_size; 00952 continue; 00953 } 00954 asf->packet_multi_size -= asf->packet_obj_size; 00955 //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); 00956 } 00957 if( /*asf->packet_frag_size == asf->packet_obj_size*/ 00958 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size 00959 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){ 00960 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n", 00961 asf_st->frag_offset, asf->packet_frag_size, 00962 asf->packet_obj_size, asf_st->pkt.size); 00963 asf->packet_obj_size= asf_st->pkt.size; 00964 } 00965 00966 if ( asf_st->pkt.size != asf->packet_obj_size 00967 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient? 00968 if(asf_st->pkt.data){ 00969 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size); 00970 asf_st->frag_offset = 0; 00971 av_free_packet(&asf_st->pkt); 00972 } 00973 /* new packet */ 00974 av_new_packet(&asf_st->pkt, asf->packet_obj_size); 00975 asf_st->seq = asf->packet_seq; 00976 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll; 00977 asf_st->pkt.stream_index = asf->stream_index; 00978 asf_st->pkt.pos = 00979 asf_st->packet_pos= asf->packet_pos; 00980 if (asf_st->pkt.data && asf_st->palette_changed) { 00981 uint8_t *pal; 00982 pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, 00983 AVPALETTE_SIZE); 00984 if (!pal) { 00985 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n"); 00986 } else { 00987 memcpy(pal, asf_st->palette, AVPALETTE_SIZE); 00988 asf_st->palette_changed = 0; 00989 } 00990 } 00991 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n", 00992 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY, 00993 //s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size); 00994 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO) 00995 asf->packet_key_frame = 1; 00996 if (asf->packet_key_frame) 00997 asf_st->pkt.flags |= AV_PKT_FLAG_KEY; 00998 } 00999 01000 /* read data */ 01001 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n", 01002 // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset, 01003 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data); 01004 asf->packet_size_left -= asf->packet_frag_size; 01005 if (asf->packet_size_left < 0) 01006 continue; 01007 01008 if( asf->packet_frag_offset >= asf_st->pkt.size 01009 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){ 01010 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n", 01011 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size); 01012 continue; 01013 } 01014 01015 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset, 01016 asf->packet_frag_size); 01017 if (ret != asf->packet_frag_size) { 01018 if (ret < 0 || asf->packet_frag_offset + ret == 0) 01019 return ret < 0 ? ret : AVERROR_EOF; 01020 if (asf_st->ds_span > 1) { 01021 // scrambling, we can either drop it completely or fill the remainder 01022 // TODO: should we fill the whole packet instead of just the current 01023 // fragment? 01024 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0, 01025 asf->packet_frag_size - ret); 01026 ret = asf->packet_frag_size; 01027 } else 01028 // no scrambling, so we can return partial packets 01029 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret); 01030 } 01031 if (s->key && s->keylen == 20) 01032 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset, 01033 ret); 01034 asf_st->frag_offset += ret; 01035 /* test if whole packet is read */ 01036 if (asf_st->frag_offset == asf_st->pkt.size) { 01037 //workaround for macroshit radio DVR-MS files 01038 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO 01039 && asf_st->pkt.size > 100){ 01040 int i; 01041 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++); 01042 if(i == asf_st->pkt.size){ 01043 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n"); 01044 asf_st->frag_offset = 0; 01045 av_free_packet(&asf_st->pkt); 01046 continue; 01047 } 01048 } 01049 01050 /* return packet */ 01051 if (asf_st->ds_span > 1) { 01052 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){ 01053 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); 01054 }else{ 01055 /* packet descrambling */ 01056 uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE); 01057 if (newdata) { 01058 int offset = 0; 01059 memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE); 01060 while (offset < asf_st->pkt.size) { 01061 int off = offset / asf_st->ds_chunk_size; 01062 int row = off / asf_st->ds_span; 01063 int col = off % asf_st->ds_span; 01064 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size; 01065 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx); 01066 01067 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size); 01068 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size); 01069 memcpy(newdata + offset, 01070 asf_st->pkt.data + idx * asf_st->ds_chunk_size, 01071 asf_st->ds_chunk_size); 01072 offset += asf_st->ds_chunk_size; 01073 } 01074 av_free(asf_st->pkt.data); 01075 asf_st->pkt.data = newdata; 01076 } 01077 } 01078 } 01079 asf_st->frag_offset = 0; 01080 *pkt= asf_st->pkt; 01081 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size); 01082 asf_st->pkt.size = 0; 01083 asf_st->pkt.data = 0; 01084 break; // packet completed 01085 } 01086 } 01087 return 0; 01088 } 01089 01090 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt) 01091 { 01092 ASFContext *asf = s->priv_data; 01093 01094 for (;;) { 01095 int ret; 01096 01097 /* parse cached packets, if any */ 01098 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0) 01099 return ret; 01100 if ((ret = ff_asf_get_packet(s, s->pb)) < 0) 01101 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1); 01102 asf->packet_time_start = 0; 01103 } 01104 01105 return 0; 01106 } 01107 01108 // Added to support seeking after packets have been read 01109 // If information is not reset, read_packet fails due to 01110 // leftover information from previous reads 01111 static void asf_reset_header(AVFormatContext *s) 01112 { 01113 ASFContext *asf = s->priv_data; 01114 ASFStream *asf_st; 01115 int i; 01116 01117 asf->packet_size_left = 0; 01118 asf->packet_segments = 0; 01119 asf->packet_flags = 0; 01120 asf->packet_property = 0; 01121 asf->packet_timestamp = 0; 01122 asf->packet_segsizetype = 0; 01123 asf->packet_segments = 0; 01124 asf->packet_seq = 0; 01125 asf->packet_replic_size = 0; 01126 asf->packet_key_frame = 0; 01127 asf->packet_padsize = 0; 01128 asf->packet_frag_offset = 0; 01129 asf->packet_frag_size = 0; 01130 asf->packet_frag_timestamp = 0; 01131 asf->packet_multi_size = 0; 01132 asf->packet_obj_size = 0; 01133 asf->packet_time_delta = 0; 01134 asf->packet_time_start = 0; 01135 01136 for(i=0; i<s->nb_streams; i++){ 01137 asf_st= s->streams[i]->priv_data; 01138 av_free_packet(&asf_st->pkt); 01139 asf_st->frag_offset=0; 01140 asf_st->seq=0; 01141 } 01142 asf->asf_st= NULL; 01143 } 01144 01145 static int asf_read_close(AVFormatContext *s) 01146 { 01147 asf_reset_header(s); 01148 01149 return 0; 01150 } 01151 01152 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit) 01153 { 01154 AVPacket pkt1, *pkt = &pkt1; 01155 ASFStream *asf_st; 01156 int64_t pts; 01157 int64_t pos= *ppos; 01158 int i; 01159 int64_t start_pos[ASF_MAX_STREAMS]; 01160 01161 for(i=0; i<s->nb_streams; i++){ 01162 start_pos[i]= pos; 01163 } 01164 01165 if (s->packet_size > 0) 01166 pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset; 01167 *ppos= pos; 01168 avio_seek(s->pb, pos, SEEK_SET); 01169 01170 //printf("asf_read_pts\n"); 01171 asf_reset_header(s); 01172 for(;;){ 01173 if (av_read_frame(s, pkt) < 0){ 01174 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n"); 01175 return AV_NOPTS_VALUE; 01176 } 01177 01178 pts= pkt->pts; 01179 01180 av_free_packet(pkt); 01181 if(pkt->flags&AV_PKT_FLAG_KEY){ 01182 i= pkt->stream_index; 01183 01184 asf_st= s->streams[i]->priv_data; 01185 01186 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0); 01187 pos= asf_st->packet_pos; 01188 01189 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME); 01190 start_pos[i]= asf_st->packet_pos + 1; 01191 01192 if(pkt->stream_index == stream_index) 01193 break; 01194 } 01195 } 01196 01197 *ppos= pos; 01198 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts); 01199 01200 return pts; 01201 } 01202 01203 static void asf_build_simple_index(AVFormatContext *s, int stream_index) 01204 { 01205 ff_asf_guid g; 01206 ASFContext *asf = s->priv_data; 01207 int64_t current_pos= avio_tell(s->pb); 01208 int i; 01209 01210 avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET); 01211 ff_get_guid(s->pb, &g); 01212 01213 /* the data object can be followed by other top-level objects, 01214 skip them until the simple index object is reached */ 01215 while (ff_guidcmp(&g, &index_guid)) { 01216 int64_t gsize= avio_rl64(s->pb); 01217 if (gsize < 24 || s->pb->eof_reached) { 01218 avio_seek(s->pb, current_pos, SEEK_SET); 01219 return; 01220 } 01221 avio_skip(s->pb, gsize-24); 01222 ff_get_guid(s->pb, &g); 01223 } 01224 01225 { 01226 int64_t itime, last_pos=-1; 01227 int pct, ict; 01228 int64_t av_unused gsize= avio_rl64(s->pb); 01229 ff_get_guid(s->pb, &g); 01230 itime=avio_rl64(s->pb); 01231 pct=avio_rl32(s->pb); 01232 ict=avio_rl32(s->pb); 01233 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict); 01234 01235 for (i=0;i<ict;i++){ 01236 int pktnum=avio_rl32(s->pb); 01237 int pktct =avio_rl16(s->pb); 01238 int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum; 01239 int64_t index_pts= FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0); 01240 01241 if(pos != last_pos){ 01242 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n", pktnum, pktct, index_pts); 01243 av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME); 01244 last_pos=pos; 01245 } 01246 } 01247 asf->index_read= 1; 01248 } 01249 avio_seek(s->pb, current_pos, SEEK_SET); 01250 } 01251 01252 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags) 01253 { 01254 ASFContext *asf = s->priv_data; 01255 AVStream *st = s->streams[stream_index]; 01256 int64_t pos; 01257 int index; 01258 01259 if (s->packet_size <= 0) 01260 return -1; 01261 01262 /* Try using the protocol's read_seek if available */ 01263 if(s->pb) { 01264 int ret = avio_seek_time(s->pb, stream_index, pts, flags); 01265 if(ret >= 0) 01266 asf_reset_header(s); 01267 if (ret != AVERROR(ENOSYS)) 01268 return ret; 01269 } 01270 01271 if (!asf->index_read) 01272 asf_build_simple_index(s, stream_index); 01273 01274 if((asf->index_read && st->index_entries)){ 01275 index= av_index_search_timestamp(st, pts, flags); 01276 if(index >= 0) { 01277 /* find the position */ 01278 pos = st->index_entries[index].pos; 01279 01280 /* do the seek */ 01281 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos); 01282 avio_seek(s->pb, pos, SEEK_SET); 01283 asf_reset_header(s); 01284 return 0; 01285 } 01286 } 01287 /* no index or seeking by index failed */ 01288 if(av_seek_frame_binary(s, stream_index, pts, flags)<0) 01289 return -1; 01290 asf_reset_header(s); 01291 return 0; 01292 } 01293 01294 AVInputFormat ff_asf_demuxer = { 01295 "asf", 01296 NULL_IF_CONFIG_SMALL("ASF format"), 01297 sizeof(ASFContext), 01298 asf_probe, 01299 asf_read_header, 01300 asf_read_packet, 01301 asf_read_close, 01302 asf_read_seek, 01303 asf_read_pts, 01304 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH, 01305 };