Libav 0.7.1
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00001 /* 00002 * MOV demuxer 00003 * Copyright (c) 2001 Fabrice Bellard 00004 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com> 00005 * 00006 * This file is part of Libav. 00007 * 00008 * Libav is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * Libav is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with Libav; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00023 #include <limits.h> 00024 00025 //#define DEBUG 00026 //#define MOV_EXPORT_ALL_METADATA 00027 00028 #include "libavutil/intreadwrite.h" 00029 #include "libavutil/avstring.h" 00030 #include "libavutil/dict.h" 00031 #include "avformat.h" 00032 #include "avio_internal.h" 00033 #include "riff.h" 00034 #include "isom.h" 00035 #include "libavcodec/get_bits.h" 00036 00037 #if CONFIG_ZLIB 00038 #include <zlib.h> 00039 #endif 00040 00041 /* 00042 * First version by Francois Revol revol@free.fr 00043 * Seek function by Gael Chardon gael.dev@4now.net 00044 * 00045 * Features and limitations: 00046 * - reads most of the QT files I have (at least the structure), 00047 * Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html 00048 * - the code is quite ugly... maybe I won't do it recursive next time :-) 00049 * 00050 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/ 00051 * when coding this :) (it's a writer anyway) 00052 * 00053 * Reference documents: 00054 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt 00055 * Apple: 00056 * http://developer.apple.com/documentation/QuickTime/QTFF/ 00057 * http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf 00058 * QuickTime is a trademark of Apple (AFAIK :)) 00059 */ 00060 00061 #include "qtpalette.h" 00062 00063 00064 #undef NDEBUG 00065 #include <assert.h> 00066 00067 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */ 00068 00069 /* those functions parse an atom */ 00070 /* return code: 00071 0: continue to parse next atom 00072 <0: error occurred, exit 00073 */ 00074 /* links atom IDs to parse functions */ 00075 typedef struct MOVParseTableEntry { 00076 uint32_t type; 00077 int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom); 00078 } MOVParseTableEntry; 00079 00080 static const MOVParseTableEntry mov_default_parse_table[]; 00081 00082 static int mov_metadata_trkn(MOVContext *c, AVIOContext *pb, unsigned len) 00083 { 00084 char buf[16]; 00085 00086 avio_rb16(pb); // unknown 00087 snprintf(buf, sizeof(buf), "%d", avio_rb16(pb)); 00088 av_dict_set(&c->fc->metadata, "track", buf, 0); 00089 00090 avio_rb16(pb); // total tracks 00091 00092 return 0; 00093 } 00094 00095 static const uint32_t mac_to_unicode[128] = { 00096 0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1, 00097 0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8, 00098 0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3, 00099 0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC, 00100 0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF, 00101 0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8, 00102 0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211, 00103 0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8, 00104 0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB, 00105 0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153, 00106 0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA, 00107 0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02, 00108 0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1, 00109 0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4, 00110 0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC, 00111 0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7, 00112 }; 00113 00114 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len, 00115 char *dst, int dstlen) 00116 { 00117 char *p = dst; 00118 char *end = dst+dstlen-1; 00119 int i; 00120 00121 for (i = 0; i < len; i++) { 00122 uint8_t t, c = avio_r8(pb); 00123 if (c < 0x80 && p < end) 00124 *p++ = c; 00125 else 00126 PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;); 00127 } 00128 *p = 0; 00129 return p - dst; 00130 } 00131 00132 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00133 { 00134 #ifdef MOV_EXPORT_ALL_METADATA 00135 char tmp_key[5]; 00136 #endif 00137 char str[1024], key2[16], language[4] = {0}; 00138 const char *key = NULL; 00139 uint16_t str_size, langcode = 0; 00140 uint32_t data_type = 0; 00141 int (*parse)(MOVContext*, AVIOContext*, unsigned) = NULL; 00142 00143 switch (atom.type) { 00144 case MKTAG(0xa9,'n','a','m'): key = "title"; break; 00145 case MKTAG(0xa9,'a','u','t'): 00146 case MKTAG(0xa9,'A','R','T'): key = "artist"; break; 00147 case MKTAG(0xa9,'w','r','t'): key = "composer"; break; 00148 case MKTAG( 'c','p','r','t'): 00149 case MKTAG(0xa9,'c','p','y'): key = "copyright"; break; 00150 case MKTAG(0xa9,'c','m','t'): 00151 case MKTAG(0xa9,'i','n','f'): key = "comment"; break; 00152 case MKTAG(0xa9,'a','l','b'): key = "album"; break; 00153 case MKTAG(0xa9,'d','a','y'): key = "date"; break; 00154 case MKTAG(0xa9,'g','e','n'): key = "genre"; break; 00155 case MKTAG(0xa9,'t','o','o'): 00156 case MKTAG(0xa9,'s','w','r'): key = "encoder"; break; 00157 case MKTAG(0xa9,'e','n','c'): key = "encoder"; break; 00158 case MKTAG( 'd','e','s','c'): key = "description";break; 00159 case MKTAG( 'l','d','e','s'): key = "synopsis"; break; 00160 case MKTAG( 't','v','s','h'): key = "show"; break; 00161 case MKTAG( 't','v','e','n'): key = "episode_id";break; 00162 case MKTAG( 't','v','n','n'): key = "network"; break; 00163 case MKTAG( 't','r','k','n'): key = "track"; 00164 parse = mov_metadata_trkn; break; 00165 } 00166 00167 if (c->itunes_metadata && atom.size > 8) { 00168 int data_size = avio_rb32(pb); 00169 int tag = avio_rl32(pb); 00170 if (tag == MKTAG('d','a','t','a')) { 00171 data_type = avio_rb32(pb); // type 00172 avio_rb32(pb); // unknown 00173 str_size = data_size - 16; 00174 atom.size -= 16; 00175 } else return 0; 00176 } else if (atom.size > 4 && key && !c->itunes_metadata) { 00177 str_size = avio_rb16(pb); // string length 00178 langcode = avio_rb16(pb); 00179 ff_mov_lang_to_iso639(langcode, language); 00180 atom.size -= 4; 00181 } else 00182 str_size = atom.size; 00183 00184 #ifdef MOV_EXPORT_ALL_METADATA 00185 if (!key) { 00186 snprintf(tmp_key, 5, "%.4s", (char*)&atom.type); 00187 key = tmp_key; 00188 } 00189 #endif 00190 00191 if (!key) 00192 return 0; 00193 if (atom.size < 0) 00194 return -1; 00195 00196 str_size = FFMIN3(sizeof(str)-1, str_size, atom.size); 00197 00198 if (parse) 00199 parse(c, pb, str_size); 00200 else { 00201 if (data_type == 3 || (data_type == 0 && langcode < 0x800)) { // MAC Encoded 00202 mov_read_mac_string(c, pb, str_size, str, sizeof(str)); 00203 } else { 00204 avio_read(pb, str, str_size); 00205 str[str_size] = 0; 00206 } 00207 av_dict_set(&c->fc->metadata, key, str, 0); 00208 if (*language && strcmp(language, "und")) { 00209 snprintf(key2, sizeof(key2), "%s-%s", key, language); 00210 av_dict_set(&c->fc->metadata, key2, str, 0); 00211 } 00212 } 00213 av_dlog(c->fc, "lang \"%3s\" ", language); 00214 av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n", 00215 key, str, (char*)&atom.type, str_size, atom.size); 00216 00217 return 0; 00218 } 00219 00220 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00221 { 00222 int64_t start; 00223 int i, nb_chapters, str_len, version; 00224 char str[256+1]; 00225 00226 if ((atom.size -= 5) < 0) 00227 return 0; 00228 00229 version = avio_r8(pb); 00230 avio_rb24(pb); 00231 if (version) 00232 avio_rb32(pb); // ??? 00233 nb_chapters = avio_r8(pb); 00234 00235 for (i = 0; i < nb_chapters; i++) { 00236 if (atom.size < 9) 00237 return 0; 00238 00239 start = avio_rb64(pb); 00240 str_len = avio_r8(pb); 00241 00242 if ((atom.size -= 9+str_len) < 0) 00243 return 0; 00244 00245 avio_read(pb, str, str_len); 00246 str[str_len] = 0; 00247 ff_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str); 00248 } 00249 return 0; 00250 } 00251 00252 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00253 { 00254 int64_t total_size = 0; 00255 MOVAtom a; 00256 int i; 00257 00258 if (atom.size < 0) 00259 atom.size = INT64_MAX; 00260 while (total_size + 8 < atom.size && !pb->eof_reached) { 00261 int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL; 00262 a.size = atom.size; 00263 a.type=0; 00264 if(atom.size >= 8) { 00265 a.size = avio_rb32(pb); 00266 a.type = avio_rl32(pb); 00267 } 00268 av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n", 00269 a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size); 00270 total_size += 8; 00271 if (a.size == 1) { /* 64 bit extended size */ 00272 a.size = avio_rb64(pb) - 8; 00273 total_size += 8; 00274 } 00275 if (a.size == 0) { 00276 a.size = atom.size - total_size; 00277 if (a.size <= 8) 00278 break; 00279 } 00280 a.size -= 8; 00281 if(a.size < 0) 00282 break; 00283 a.size = FFMIN(a.size, atom.size - total_size); 00284 00285 for (i = 0; mov_default_parse_table[i].type; i++) 00286 if (mov_default_parse_table[i].type == a.type) { 00287 parse = mov_default_parse_table[i].parse; 00288 break; 00289 } 00290 00291 // container is user data 00292 if (!parse && (atom.type == MKTAG('u','d','t','a') || 00293 atom.type == MKTAG('i','l','s','t'))) 00294 parse = mov_read_udta_string; 00295 00296 if (!parse) { /* skip leaf atoms data */ 00297 avio_skip(pb, a.size); 00298 } else { 00299 int64_t start_pos = avio_tell(pb); 00300 int64_t left; 00301 int err = parse(c, pb, a); 00302 if (err < 0) 00303 return err; 00304 if (c->found_moov && c->found_mdat && 00305 (!pb->seekable || start_pos + a.size == avio_size(pb))) 00306 return 0; 00307 left = a.size - avio_tell(pb) + start_pos; 00308 if (left > 0) /* skip garbage at atom end */ 00309 avio_skip(pb, left); 00310 } 00311 00312 total_size += a.size; 00313 } 00314 00315 if (total_size < atom.size && atom.size < 0x7ffff) 00316 avio_skip(pb, atom.size - total_size); 00317 00318 return 0; 00319 } 00320 00321 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00322 { 00323 AVStream *st; 00324 MOVStreamContext *sc; 00325 int entries, i, j; 00326 00327 if (c->fc->nb_streams < 1) 00328 return 0; 00329 st = c->fc->streams[c->fc->nb_streams-1]; 00330 sc = st->priv_data; 00331 00332 avio_rb32(pb); // version + flags 00333 entries = avio_rb32(pb); 00334 if (entries >= UINT_MAX / sizeof(*sc->drefs)) 00335 return -1; 00336 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs)); 00337 if (!sc->drefs) 00338 return AVERROR(ENOMEM); 00339 sc->drefs_count = entries; 00340 00341 for (i = 0; i < sc->drefs_count; i++) { 00342 MOVDref *dref = &sc->drefs[i]; 00343 uint32_t size = avio_rb32(pb); 00344 int64_t next = avio_tell(pb) + size - 4; 00345 00346 if (size < 12) 00347 return -1; 00348 00349 dref->type = avio_rl32(pb); 00350 avio_rb32(pb); // version + flags 00351 av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size); 00352 00353 if (dref->type == MKTAG('a','l','i','s') && size > 150) { 00354 /* macintosh alias record */ 00355 uint16_t volume_len, len; 00356 int16_t type; 00357 00358 avio_skip(pb, 10); 00359 00360 volume_len = avio_r8(pb); 00361 volume_len = FFMIN(volume_len, 27); 00362 avio_read(pb, dref->volume, 27); 00363 dref->volume[volume_len] = 0; 00364 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len); 00365 00366 avio_skip(pb, 12); 00367 00368 len = avio_r8(pb); 00369 len = FFMIN(len, 63); 00370 avio_read(pb, dref->filename, 63); 00371 dref->filename[len] = 0; 00372 av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len); 00373 00374 avio_skip(pb, 16); 00375 00376 /* read next level up_from_alias/down_to_target */ 00377 dref->nlvl_from = avio_rb16(pb); 00378 dref->nlvl_to = avio_rb16(pb); 00379 av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n", 00380 dref->nlvl_from, dref->nlvl_to); 00381 00382 avio_skip(pb, 16); 00383 00384 for (type = 0; type != -1 && avio_tell(pb) < next; ) { 00385 type = avio_rb16(pb); 00386 len = avio_rb16(pb); 00387 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len); 00388 if (len&1) 00389 len += 1; 00390 if (type == 2) { // absolute path 00391 av_free(dref->path); 00392 dref->path = av_mallocz(len+1); 00393 if (!dref->path) 00394 return AVERROR(ENOMEM); 00395 avio_read(pb, dref->path, len); 00396 if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) { 00397 len -= volume_len; 00398 memmove(dref->path, dref->path+volume_len, len); 00399 dref->path[len] = 0; 00400 } 00401 for (j = 0; j < len; j++) 00402 if (dref->path[j] == ':') 00403 dref->path[j] = '/'; 00404 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path); 00405 } else if (type == 0) { // directory name 00406 av_free(dref->dir); 00407 dref->dir = av_malloc(len+1); 00408 if (!dref->dir) 00409 return AVERROR(ENOMEM); 00410 avio_read(pb, dref->dir, len); 00411 dref->dir[len] = 0; 00412 for (j = 0; j < len; j++) 00413 if (dref->dir[j] == ':') 00414 dref->dir[j] = '/'; 00415 av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir); 00416 } else 00417 avio_skip(pb, len); 00418 } 00419 } 00420 avio_seek(pb, next, SEEK_SET); 00421 } 00422 return 0; 00423 } 00424 00425 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00426 { 00427 AVStream *st; 00428 uint32_t type; 00429 uint32_t av_unused ctype; 00430 00431 if (c->fc->nb_streams < 1) // meta before first trak 00432 return 0; 00433 00434 st = c->fc->streams[c->fc->nb_streams-1]; 00435 00436 avio_r8(pb); /* version */ 00437 avio_rb24(pb); /* flags */ 00438 00439 /* component type */ 00440 ctype = avio_rl32(pb); 00441 type = avio_rl32(pb); /* component subtype */ 00442 00443 av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype); 00444 av_dlog(c->fc, "stype= %.4s\n", (char*)&type); 00445 00446 if (type == MKTAG('v','i','d','e')) 00447 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 00448 else if(type == MKTAG('s','o','u','n')) 00449 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 00450 else if(type == MKTAG('m','1','a',' ')) 00451 st->codec->codec_id = CODEC_ID_MP2; 00452 else if(type == MKTAG('s','u','b','p')) 00453 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; 00454 00455 avio_rb32(pb); /* component manufacture */ 00456 avio_rb32(pb); /* component flags */ 00457 avio_rb32(pb); /* component flags mask */ 00458 00459 return 0; 00460 } 00461 00462 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom) 00463 { 00464 AVStream *st; 00465 int tag; 00466 00467 if (fc->nb_streams < 1) 00468 return 0; 00469 st = fc->streams[fc->nb_streams-1]; 00470 00471 avio_rb32(pb); /* version + flags */ 00472 ff_mp4_read_descr(fc, pb, &tag); 00473 if (tag == MP4ESDescrTag) { 00474 avio_rb16(pb); /* ID */ 00475 avio_r8(pb); /* priority */ 00476 } else 00477 avio_rb16(pb); /* ID */ 00478 00479 ff_mp4_read_descr(fc, pb, &tag); 00480 if (tag == MP4DecConfigDescrTag) 00481 ff_mp4_read_dec_config_descr(fc, st, pb); 00482 return 0; 00483 } 00484 00485 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00486 { 00487 return ff_mov_read_esds(c->fc, pb, atom); 00488 } 00489 00490 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00491 { 00492 AVStream *st; 00493 int ac3info, acmod, lfeon, bsmod; 00494 00495 if (c->fc->nb_streams < 1) 00496 return 0; 00497 st = c->fc->streams[c->fc->nb_streams-1]; 00498 00499 ac3info = avio_rb24(pb); 00500 bsmod = (ac3info >> 14) & 0x7; 00501 acmod = (ac3info >> 11) & 0x7; 00502 lfeon = (ac3info >> 10) & 0x1; 00503 st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon; 00504 st->codec->audio_service_type = bsmod; 00505 if (st->codec->channels > 1 && bsmod == 0x7) 00506 st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE; 00507 00508 return 0; 00509 } 00510 00511 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00512 { 00513 AVStream *st; 00514 00515 if (c->fc->nb_streams < 1) 00516 return 0; 00517 st = c->fc->streams[c->fc->nb_streams-1]; 00518 00519 ff_get_wav_header(pb, st->codec, atom.size); 00520 00521 return 0; 00522 } 00523 00524 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00525 { 00526 const int num = avio_rb32(pb); 00527 const int den = avio_rb32(pb); 00528 AVStream *st; 00529 00530 if (c->fc->nb_streams < 1) 00531 return 0; 00532 st = c->fc->streams[c->fc->nb_streams-1]; 00533 00534 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default 00535 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) { 00536 av_log(c->fc, AV_LOG_WARNING, 00537 "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n", 00538 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den, 00539 num, den); 00540 } else if (den != 0) { 00541 st->sample_aspect_ratio.num = num; 00542 st->sample_aspect_ratio.den = den; 00543 } 00544 return 0; 00545 } 00546 00547 /* this atom contains actual media data */ 00548 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00549 { 00550 if(atom.size == 0) /* wrong one (MP4) */ 00551 return 0; 00552 c->found_mdat=1; 00553 return 0; /* now go for moov */ 00554 } 00555 00556 /* read major brand, minor version and compatible brands and store them as metadata */ 00557 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00558 { 00559 uint32_t minor_ver; 00560 int comp_brand_size; 00561 char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */ 00562 char* comp_brands_str; 00563 uint8_t type[5] = {0}; 00564 00565 avio_read(pb, type, 4); 00566 if (strcmp(type, "qt ")) 00567 c->isom = 1; 00568 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type); 00569 av_dict_set(&c->fc->metadata, "major_brand", type, 0); 00570 minor_ver = avio_rb32(pb); /* minor version */ 00571 snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver); 00572 av_dict_set(&c->fc->metadata, "minor_version", minor_ver_str, 0); 00573 00574 comp_brand_size = atom.size - 8; 00575 if (comp_brand_size < 0) 00576 return -1; 00577 comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */ 00578 if (!comp_brands_str) 00579 return AVERROR(ENOMEM); 00580 avio_read(pb, comp_brands_str, comp_brand_size); 00581 comp_brands_str[comp_brand_size] = 0; 00582 av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0); 00583 av_freep(&comp_brands_str); 00584 00585 return 0; 00586 } 00587 00588 /* this atom should contain all header atoms */ 00589 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00590 { 00591 if (mov_read_default(c, pb, atom) < 0) 00592 return -1; 00593 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */ 00594 /* so we don't parse the whole file if over a network */ 00595 c->found_moov=1; 00596 return 0; /* now go for mdat */ 00597 } 00598 00599 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00600 { 00601 c->fragment.moof_offset = avio_tell(pb) - 8; 00602 av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset); 00603 return mov_read_default(c, pb, atom); 00604 } 00605 00606 static void mov_metadata_creation_time(AVDictionary **metadata, time_t time) 00607 { 00608 char buffer[32]; 00609 if (time) { 00610 struct tm *ptm; 00611 time -= 2082844800; /* seconds between 1904-01-01 and Epoch */ 00612 ptm = gmtime(&time); 00613 if (!ptm) return; 00614 strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm); 00615 av_dict_set(metadata, "creation_time", buffer, 0); 00616 } 00617 } 00618 00619 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00620 { 00621 AVStream *st; 00622 MOVStreamContext *sc; 00623 int version; 00624 char language[4] = {0}; 00625 unsigned lang; 00626 time_t creation_time; 00627 00628 if (c->fc->nb_streams < 1) 00629 return 0; 00630 st = c->fc->streams[c->fc->nb_streams-1]; 00631 sc = st->priv_data; 00632 00633 version = avio_r8(pb); 00634 if (version > 1) 00635 return -1; /* unsupported */ 00636 00637 avio_rb24(pb); /* flags */ 00638 if (version == 1) { 00639 creation_time = avio_rb64(pb); 00640 avio_rb64(pb); 00641 } else { 00642 creation_time = avio_rb32(pb); 00643 avio_rb32(pb); /* modification time */ 00644 } 00645 mov_metadata_creation_time(&st->metadata, creation_time); 00646 00647 sc->time_scale = avio_rb32(pb); 00648 st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */ 00649 00650 lang = avio_rb16(pb); /* language */ 00651 if (ff_mov_lang_to_iso639(lang, language)) 00652 av_dict_set(&st->metadata, "language", language, 0); 00653 avio_rb16(pb); /* quality */ 00654 00655 return 0; 00656 } 00657 00658 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00659 { 00660 time_t creation_time; 00661 int version = avio_r8(pb); /* version */ 00662 avio_rb24(pb); /* flags */ 00663 00664 if (version == 1) { 00665 creation_time = avio_rb64(pb); 00666 avio_rb64(pb); 00667 } else { 00668 creation_time = avio_rb32(pb); 00669 avio_rb32(pb); /* modification time */ 00670 } 00671 mov_metadata_creation_time(&c->fc->metadata, creation_time); 00672 c->time_scale = avio_rb32(pb); /* time scale */ 00673 00674 av_dlog(c->fc, "time scale = %i\n", c->time_scale); 00675 00676 c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */ 00677 avio_rb32(pb); /* preferred scale */ 00678 00679 avio_rb16(pb); /* preferred volume */ 00680 00681 avio_skip(pb, 10); /* reserved */ 00682 00683 avio_skip(pb, 36); /* display matrix */ 00684 00685 avio_rb32(pb); /* preview time */ 00686 avio_rb32(pb); /* preview duration */ 00687 avio_rb32(pb); /* poster time */ 00688 avio_rb32(pb); /* selection time */ 00689 avio_rb32(pb); /* selection duration */ 00690 avio_rb32(pb); /* current time */ 00691 avio_rb32(pb); /* next track ID */ 00692 00693 return 0; 00694 } 00695 00696 static int mov_read_smi(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00697 { 00698 AVStream *st; 00699 00700 if (c->fc->nb_streams < 1) 00701 return 0; 00702 st = c->fc->streams[c->fc->nb_streams-1]; 00703 00704 if((uint64_t)atom.size > (1<<30)) 00705 return -1; 00706 00707 // currently SVQ3 decoder expect full STSD header - so let's fake it 00708 // this should be fixed and just SMI header should be passed 00709 av_free(st->codec->extradata); 00710 st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE); 00711 if (!st->codec->extradata) 00712 return AVERROR(ENOMEM); 00713 st->codec->extradata_size = 0x5a + atom.size; 00714 memcpy(st->codec->extradata, "SVQ3", 4); // fake 00715 avio_read(pb, st->codec->extradata + 0x5a, atom.size); 00716 av_dlog(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a); 00717 return 0; 00718 } 00719 00720 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00721 { 00722 AVStream *st; 00723 int little_endian; 00724 00725 if (c->fc->nb_streams < 1) 00726 return 0; 00727 st = c->fc->streams[c->fc->nb_streams-1]; 00728 00729 little_endian = avio_rb16(pb); 00730 av_dlog(c->fc, "enda %d\n", little_endian); 00731 if (little_endian == 1) { 00732 switch (st->codec->codec_id) { 00733 case CODEC_ID_PCM_S24BE: 00734 st->codec->codec_id = CODEC_ID_PCM_S24LE; 00735 break; 00736 case CODEC_ID_PCM_S32BE: 00737 st->codec->codec_id = CODEC_ID_PCM_S32LE; 00738 break; 00739 case CODEC_ID_PCM_F32BE: 00740 st->codec->codec_id = CODEC_ID_PCM_F32LE; 00741 break; 00742 case CODEC_ID_PCM_F64BE: 00743 st->codec->codec_id = CODEC_ID_PCM_F64LE; 00744 break; 00745 default: 00746 break; 00747 } 00748 } 00749 return 0; 00750 } 00751 00752 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */ 00753 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00754 { 00755 AVStream *st; 00756 uint64_t size; 00757 uint8_t *buf; 00758 00759 if (c->fc->nb_streams < 1) // will happen with jp2 files 00760 return 0; 00761 st= c->fc->streams[c->fc->nb_streams-1]; 00762 size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE; 00763 if(size > INT_MAX || (uint64_t)atom.size > INT_MAX) 00764 return -1; 00765 buf= av_realloc(st->codec->extradata, size); 00766 if(!buf) 00767 return -1; 00768 st->codec->extradata= buf; 00769 buf+= st->codec->extradata_size; 00770 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE; 00771 AV_WB32( buf , atom.size + 8); 00772 AV_WL32( buf + 4, atom.type); 00773 avio_read(pb, buf + 8, atom.size); 00774 return 0; 00775 } 00776 00777 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00778 { 00779 AVStream *st; 00780 00781 if (c->fc->nb_streams < 1) 00782 return 0; 00783 st = c->fc->streams[c->fc->nb_streams-1]; 00784 00785 if((uint64_t)atom.size > (1<<30)) 00786 return -1; 00787 00788 if (st->codec->codec_id == CODEC_ID_QDM2 || st->codec->codec_id == CODEC_ID_QDMC) { 00789 // pass all frma atom to codec, needed at least for QDMC and QDM2 00790 av_free(st->codec->extradata); 00791 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE); 00792 if (!st->codec->extradata) 00793 return AVERROR(ENOMEM); 00794 st->codec->extradata_size = atom.size; 00795 avio_read(pb, st->codec->extradata, atom.size); 00796 } else if (atom.size > 8) { /* to read frma, esds atoms */ 00797 if (mov_read_default(c, pb, atom) < 0) 00798 return -1; 00799 } else 00800 avio_skip(pb, atom.size); 00801 return 0; 00802 } 00803 00808 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00809 { 00810 AVStream *st; 00811 00812 if (c->fc->nb_streams < 1) 00813 return 0; 00814 st = c->fc->streams[c->fc->nb_streams-1]; 00815 00816 if((uint64_t)atom.size > (1<<30)) 00817 return -1; 00818 00819 av_free(st->codec->extradata); 00820 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE); 00821 if (!st->codec->extradata) 00822 return AVERROR(ENOMEM); 00823 st->codec->extradata_size = atom.size; 00824 avio_read(pb, st->codec->extradata, atom.size); 00825 return 0; 00826 } 00827 00833 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00834 { 00835 AVStream *st; 00836 00837 if (c->fc->nb_streams < 1) 00838 return 0; 00839 if (atom.size <= 40) 00840 return 0; 00841 st = c->fc->streams[c->fc->nb_streams-1]; 00842 00843 if((uint64_t)atom.size > (1<<30)) 00844 return -1; 00845 00846 av_free(st->codec->extradata); 00847 st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE); 00848 if (!st->codec->extradata) 00849 return AVERROR(ENOMEM); 00850 st->codec->extradata_size = atom.size - 40; 00851 avio_skip(pb, 40); 00852 avio_read(pb, st->codec->extradata, atom.size - 40); 00853 return 0; 00854 } 00855 00856 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom) 00857 { 00858 AVStream *st; 00859 MOVStreamContext *sc; 00860 unsigned int i, entries; 00861 00862 if (c->fc->nb_streams < 1) 00863 return 0; 00864 st = c->fc->streams[c->fc->nb_streams-1]; 00865 sc = st->priv_data; 00866 00867 avio_r8(pb); /* version */ 00868 avio_rb24(pb); /* flags */ 00869 00870 entries = avio_rb32(pb); 00871 00872 if(entries >= UINT_MAX/sizeof(int64_t)) 00873 return -1; 00874 00875 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t)); 00876 if (!sc->chunk_offsets) 00877 return AVERROR(ENOMEM); 00878 sc->chunk_count = entries; 00879 00880 if (atom.type == MKTAG('s','t','c','o')) 00881 for(i=0; i<entries; i++) 00882 sc->chunk_offsets[i] = avio_rb32(pb); 00883 else if (atom.type == MKTAG('c','o','6','4')) 00884 for(i=0; i<entries; i++) 00885 sc->chunk_offsets[i] = avio_rb64(pb); 00886 else 00887 return -1; 00888 00889 return 0; 00890 } 00891 00896 enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags) 00897 { 00898 if (flags & 1) { // floating point 00899 if (flags & 2) { // big endian 00900 if (bps == 32) return CODEC_ID_PCM_F32BE; 00901 else if (bps == 64) return CODEC_ID_PCM_F64BE; 00902 } else { 00903 if (bps == 32) return CODEC_ID_PCM_F32LE; 00904 else if (bps == 64) return CODEC_ID_PCM_F64LE; 00905 } 00906 } else { 00907 if (flags & 2) { 00908 if (bps == 8) 00909 // signed integer 00910 if (flags & 4) return CODEC_ID_PCM_S8; 00911 else return CODEC_ID_PCM_U8; 00912 else if (bps == 16) return CODEC_ID_PCM_S16BE; 00913 else if (bps == 24) return CODEC_ID_PCM_S24BE; 00914 else if (bps == 32) return CODEC_ID_PCM_S32BE; 00915 } else { 00916 if (bps == 8) 00917 if (flags & 4) return CODEC_ID_PCM_S8; 00918 else return CODEC_ID_PCM_U8; 00919 else if (bps == 16) return CODEC_ID_PCM_S16LE; 00920 else if (bps == 24) return CODEC_ID_PCM_S24LE; 00921 else if (bps == 32) return CODEC_ID_PCM_S32LE; 00922 } 00923 } 00924 return CODEC_ID_NONE; 00925 } 00926 00927 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries) 00928 { 00929 AVStream *st; 00930 MOVStreamContext *sc; 00931 int j, pseudo_stream_id; 00932 00933 if (c->fc->nb_streams < 1) 00934 return 0; 00935 st = c->fc->streams[c->fc->nb_streams-1]; 00936 sc = st->priv_data; 00937 00938 for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) { 00939 //Parsing Sample description table 00940 enum CodecID id; 00941 int dref_id = 1; 00942 MOVAtom a = { AV_RL32("stsd") }; 00943 int64_t start_pos = avio_tell(pb); 00944 int size = avio_rb32(pb); /* size */ 00945 uint32_t format = avio_rl32(pb); /* data format */ 00946 00947 if (size >= 16) { 00948 avio_rb32(pb); /* reserved */ 00949 avio_rb16(pb); /* reserved */ 00950 dref_id = avio_rb16(pb); 00951 } 00952 00953 if (st->codec->codec_tag && 00954 st->codec->codec_tag != format && 00955 (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id 00956 : st->codec->codec_tag != MKTAG('j','p','e','g')) 00957 ){ 00958 /* Multiple fourcc, we skip JPEG. This is not correct, we should 00959 * export it as a separate AVStream but this needs a few changes 00960 * in the MOV demuxer, patch welcome. */ 00961 multiple_stsd: 00962 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n"); 00963 avio_skip(pb, size - (avio_tell(pb) - start_pos)); 00964 continue; 00965 } 00966 /* we cannot demux concatenated h264 streams because of different extradata */ 00967 if (st->codec->codec_tag && st->codec->codec_tag == AV_RL32("avc1")) 00968 goto multiple_stsd; 00969 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id; 00970 sc->dref_id= dref_id; 00971 00972 st->codec->codec_tag = format; 00973 id = ff_codec_get_id(codec_movaudio_tags, format); 00974 if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8))) 00975 id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format)&0xFFFF); 00976 00977 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) { 00978 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 00979 } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */ 00980 format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */ 00981 id = ff_codec_get_id(codec_movvideo_tags, format); 00982 if (id <= 0) 00983 id = ff_codec_get_id(ff_codec_bmp_tags, format); 00984 if (id > 0) 00985 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 00986 else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){ 00987 id = ff_codec_get_id(ff_codec_movsubtitle_tags, format); 00988 if(id > 0) 00989 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; 00990 } 00991 } 00992 00993 av_dlog(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size, 00994 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff, 00995 (format >> 24) & 0xff, st->codec->codec_type); 00996 00997 if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) { 00998 unsigned int color_depth, len; 00999 int color_greyscale; 01000 01001 st->codec->codec_id = id; 01002 avio_rb16(pb); /* version */ 01003 avio_rb16(pb); /* revision level */ 01004 avio_rb32(pb); /* vendor */ 01005 avio_rb32(pb); /* temporal quality */ 01006 avio_rb32(pb); /* spatial quality */ 01007 01008 st->codec->width = avio_rb16(pb); /* width */ 01009 st->codec->height = avio_rb16(pb); /* height */ 01010 01011 avio_rb32(pb); /* horiz resolution */ 01012 avio_rb32(pb); /* vert resolution */ 01013 avio_rb32(pb); /* data size, always 0 */ 01014 avio_rb16(pb); /* frames per samples */ 01015 01016 len = avio_r8(pb); /* codec name, pascal string */ 01017 if (len > 31) 01018 len = 31; 01019 mov_read_mac_string(c, pb, len, st->codec->codec_name, 32); 01020 if (len < 31) 01021 avio_skip(pb, 31 - len); 01022 /* codec_tag YV12 triggers an UV swap in rawdec.c */ 01023 if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) 01024 st->codec->codec_tag=MKTAG('I', '4', '2', '0'); 01025 01026 st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */ 01027 st->codec->color_table_id = avio_rb16(pb); /* colortable id */ 01028 av_dlog(c->fc, "depth %d, ctab id %d\n", 01029 st->codec->bits_per_coded_sample, st->codec->color_table_id); 01030 /* figure out the palette situation */ 01031 color_depth = st->codec->bits_per_coded_sample & 0x1F; 01032 color_greyscale = st->codec->bits_per_coded_sample & 0x20; 01033 01034 /* if the depth is 2, 4, or 8 bpp, file is palettized */ 01035 if ((color_depth == 2) || (color_depth == 4) || 01036 (color_depth == 8)) { 01037 /* for palette traversal */ 01038 unsigned int color_start, color_count, color_end; 01039 unsigned char r, g, b; 01040 01041 if (color_greyscale) { 01042 int color_index, color_dec; 01043 /* compute the greyscale palette */ 01044 st->codec->bits_per_coded_sample = color_depth; 01045 color_count = 1 << color_depth; 01046 color_index = 255; 01047 color_dec = 256 / (color_count - 1); 01048 for (j = 0; j < color_count; j++) { 01049 r = g = b = color_index; 01050 sc->palette[j] = 01051 (r << 16) | (g << 8) | (b); 01052 color_index -= color_dec; 01053 if (color_index < 0) 01054 color_index = 0; 01055 } 01056 } else if (st->codec->color_table_id) { 01057 const uint8_t *color_table; 01058 /* if flag bit 3 is set, use the default palette */ 01059 color_count = 1 << color_depth; 01060 if (color_depth == 2) 01061 color_table = ff_qt_default_palette_4; 01062 else if (color_depth == 4) 01063 color_table = ff_qt_default_palette_16; 01064 else 01065 color_table = ff_qt_default_palette_256; 01066 01067 for (j = 0; j < color_count; j++) { 01068 r = color_table[j * 3 + 0]; 01069 g = color_table[j * 3 + 1]; 01070 b = color_table[j * 3 + 2]; 01071 sc->palette[j] = 01072 (r << 16) | (g << 8) | (b); 01073 } 01074 } else { 01075 /* load the palette from the file */ 01076 color_start = avio_rb32(pb); 01077 color_count = avio_rb16(pb); 01078 color_end = avio_rb16(pb); 01079 if ((color_start <= 255) && 01080 (color_end <= 255)) { 01081 for (j = color_start; j <= color_end; j++) { 01082 /* each R, G, or B component is 16 bits; 01083 * only use the top 8 bits; skip alpha bytes 01084 * up front */ 01085 avio_r8(pb); 01086 avio_r8(pb); 01087 r = avio_r8(pb); 01088 avio_r8(pb); 01089 g = avio_r8(pb); 01090 avio_r8(pb); 01091 b = avio_r8(pb); 01092 avio_r8(pb); 01093 sc->palette[j] = 01094 (r << 16) | (g << 8) | (b); 01095 } 01096 } 01097 } 01098 sc->has_palette = 1; 01099 } 01100 } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) { 01101 int bits_per_sample, flags; 01102 uint16_t version = avio_rb16(pb); 01103 01104 st->codec->codec_id = id; 01105 avio_rb16(pb); /* revision level */ 01106 avio_rb32(pb); /* vendor */ 01107 01108 st->codec->channels = avio_rb16(pb); /* channel count */ 01109 av_dlog(c->fc, "audio channels %d\n", st->codec->channels); 01110 st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */ 01111 01112 sc->audio_cid = avio_rb16(pb); 01113 avio_rb16(pb); /* packet size = 0 */ 01114 01115 st->codec->sample_rate = ((avio_rb32(pb) >> 16)); 01116 01117 //Read QT version 1 fields. In version 0 these do not exist. 01118 av_dlog(c->fc, "version =%d, isom =%d\n",version,c->isom); 01119 if(!c->isom) { 01120 if(version==1) { 01121 sc->samples_per_frame = avio_rb32(pb); 01122 avio_rb32(pb); /* bytes per packet */ 01123 sc->bytes_per_frame = avio_rb32(pb); 01124 avio_rb32(pb); /* bytes per sample */ 01125 } else if(version==2) { 01126 avio_rb32(pb); /* sizeof struct only */ 01127 st->codec->sample_rate = av_int2dbl(avio_rb64(pb)); /* float 64 */ 01128 st->codec->channels = avio_rb32(pb); 01129 avio_rb32(pb); /* always 0x7F000000 */ 01130 st->codec->bits_per_coded_sample = avio_rb32(pb); /* bits per channel if sound is uncompressed */ 01131 flags = avio_rb32(pb); /* lpcm format specific flag */ 01132 sc->bytes_per_frame = avio_rb32(pb); /* bytes per audio packet if constant */ 01133 sc->samples_per_frame = avio_rb32(pb); /* lpcm frames per audio packet if constant */ 01134 if (format == MKTAG('l','p','c','m')) 01135 st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags); 01136 } 01137 } 01138 01139 switch (st->codec->codec_id) { 01140 case CODEC_ID_PCM_S8: 01141 case CODEC_ID_PCM_U8: 01142 if (st->codec->bits_per_coded_sample == 16) 01143 st->codec->codec_id = CODEC_ID_PCM_S16BE; 01144 break; 01145 case CODEC_ID_PCM_S16LE: 01146 case CODEC_ID_PCM_S16BE: 01147 if (st->codec->bits_per_coded_sample == 8) 01148 st->codec->codec_id = CODEC_ID_PCM_S8; 01149 else if (st->codec->bits_per_coded_sample == 24) 01150 st->codec->codec_id = 01151 st->codec->codec_id == CODEC_ID_PCM_S16BE ? 01152 CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE; 01153 break; 01154 /* set values for old format before stsd version 1 appeared */ 01155 case CODEC_ID_MACE3: 01156 sc->samples_per_frame = 6; 01157 sc->bytes_per_frame = 2*st->codec->channels; 01158 break; 01159 case CODEC_ID_MACE6: 01160 sc->samples_per_frame = 6; 01161 sc->bytes_per_frame = 1*st->codec->channels; 01162 break; 01163 case CODEC_ID_ADPCM_IMA_QT: 01164 sc->samples_per_frame = 64; 01165 sc->bytes_per_frame = 34*st->codec->channels; 01166 break; 01167 case CODEC_ID_GSM: 01168 sc->samples_per_frame = 160; 01169 sc->bytes_per_frame = 33; 01170 break; 01171 default: 01172 break; 01173 } 01174 01175 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id); 01176 if (bits_per_sample) { 01177 st->codec->bits_per_coded_sample = bits_per_sample; 01178 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels; 01179 } 01180 } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){ 01181 // ttxt stsd contains display flags, justification, background 01182 // color, fonts, and default styles, so fake an atom to read it 01183 MOVAtom fake_atom = { .size = size - (avio_tell(pb) - start_pos) }; 01184 if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom 01185 mov_read_glbl(c, pb, fake_atom); 01186 st->codec->codec_id= id; 01187 st->codec->width = sc->width; 01188 st->codec->height = sc->height; 01189 } else { 01190 /* other codec type, just skip (rtp, mp4s, tmcd ...) */ 01191 avio_skip(pb, size - (avio_tell(pb) - start_pos)); 01192 } 01193 /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */ 01194 a.size = size - (avio_tell(pb) - start_pos); 01195 if (a.size > 8) { 01196 if (mov_read_default(c, pb, a) < 0) 01197 return -1; 01198 } else if (a.size > 0) 01199 avio_skip(pb, a.size); 01200 } 01201 01202 if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1) 01203 st->codec->sample_rate= sc->time_scale; 01204 01205 /* special codec parameters handling */ 01206 switch (st->codec->codec_id) { 01207 #if CONFIG_DV_DEMUXER 01208 case CODEC_ID_DVAUDIO: 01209 c->dv_fctx = avformat_alloc_context(); 01210 c->dv_demux = dv_init_demux(c->dv_fctx); 01211 if (!c->dv_demux) { 01212 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n"); 01213 return -1; 01214 } 01215 sc->dv_audio_container = 1; 01216 st->codec->codec_id = CODEC_ID_PCM_S16LE; 01217 break; 01218 #endif 01219 /* no ifdef since parameters are always those */ 01220 case CODEC_ID_QCELP: 01221 // force sample rate for qcelp when not stored in mov 01222 if (st->codec->codec_tag != MKTAG('Q','c','l','p')) 01223 st->codec->sample_rate = 8000; 01224 st->codec->frame_size= 160; 01225 st->codec->channels= 1; /* really needed */ 01226 break; 01227 case CODEC_ID_AMR_NB: 01228 case CODEC_ID_AMR_WB: 01229 st->codec->frame_size= sc->samples_per_frame; 01230 st->codec->channels= 1; /* really needed */ 01231 /* force sample rate for amr, stsd in 3gp does not store sample rate */ 01232 if (st->codec->codec_id == CODEC_ID_AMR_NB) 01233 st->codec->sample_rate = 8000; 01234 else if (st->codec->codec_id == CODEC_ID_AMR_WB) 01235 st->codec->sample_rate = 16000; 01236 break; 01237 case CODEC_ID_MP2: 01238 case CODEC_ID_MP3: 01239 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */ 01240 st->need_parsing = AVSTREAM_PARSE_FULL; 01241 break; 01242 case CODEC_ID_GSM: 01243 case CODEC_ID_ADPCM_MS: 01244 case CODEC_ID_ADPCM_IMA_WAV: 01245 st->codec->frame_size = sc->samples_per_frame; 01246 st->codec->block_align = sc->bytes_per_frame; 01247 break; 01248 case CODEC_ID_ALAC: 01249 if (st->codec->extradata_size == 36) { 01250 st->codec->frame_size = AV_RB32(st->codec->extradata+12); 01251 st->codec->channels = AV_RB8 (st->codec->extradata+21); 01252 st->codec->sample_rate = AV_RB32(st->codec->extradata+32); 01253 } 01254 break; 01255 default: 01256 break; 01257 } 01258 01259 return 0; 01260 } 01261 01262 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01263 { 01264 int entries; 01265 01266 avio_r8(pb); /* version */ 01267 avio_rb24(pb); /* flags */ 01268 entries = avio_rb32(pb); 01269 01270 return ff_mov_read_stsd_entries(c, pb, entries); 01271 } 01272 01273 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01274 { 01275 AVStream *st; 01276 MOVStreamContext *sc; 01277 unsigned int i, entries; 01278 01279 if (c->fc->nb_streams < 1) 01280 return 0; 01281 st = c->fc->streams[c->fc->nb_streams-1]; 01282 sc = st->priv_data; 01283 01284 avio_r8(pb); /* version */ 01285 avio_rb24(pb); /* flags */ 01286 01287 entries = avio_rb32(pb); 01288 01289 av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries); 01290 01291 if(entries >= UINT_MAX / sizeof(*sc->stsc_data)) 01292 return -1; 01293 sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data)); 01294 if (!sc->stsc_data) 01295 return AVERROR(ENOMEM); 01296 sc->stsc_count = entries; 01297 01298 for(i=0; i<entries; i++) { 01299 sc->stsc_data[i].first = avio_rb32(pb); 01300 sc->stsc_data[i].count = avio_rb32(pb); 01301 sc->stsc_data[i].id = avio_rb32(pb); 01302 } 01303 return 0; 01304 } 01305 01306 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01307 { 01308 AVStream *st; 01309 MOVStreamContext *sc; 01310 unsigned i, entries; 01311 01312 if (c->fc->nb_streams < 1) 01313 return 0; 01314 st = c->fc->streams[c->fc->nb_streams-1]; 01315 sc = st->priv_data; 01316 01317 avio_rb32(pb); // version + flags 01318 01319 entries = avio_rb32(pb); 01320 if (entries >= UINT_MAX / sizeof(*sc->stps_data)) 01321 return -1; 01322 sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data)); 01323 if (!sc->stps_data) 01324 return AVERROR(ENOMEM); 01325 sc->stps_count = entries; 01326 01327 for (i = 0; i < entries; i++) { 01328 sc->stps_data[i] = avio_rb32(pb); 01329 //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]); 01330 } 01331 01332 return 0; 01333 } 01334 01335 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01336 { 01337 AVStream *st; 01338 MOVStreamContext *sc; 01339 unsigned int i, entries; 01340 01341 if (c->fc->nb_streams < 1) 01342 return 0; 01343 st = c->fc->streams[c->fc->nb_streams-1]; 01344 sc = st->priv_data; 01345 01346 avio_r8(pb); /* version */ 01347 avio_rb24(pb); /* flags */ 01348 01349 entries = avio_rb32(pb); 01350 01351 av_dlog(c->fc, "keyframe_count = %d\n", entries); 01352 01353 if(entries >= UINT_MAX / sizeof(int)) 01354 return -1; 01355 sc->keyframes = av_malloc(entries * sizeof(int)); 01356 if (!sc->keyframes) 01357 return AVERROR(ENOMEM); 01358 sc->keyframe_count = entries; 01359 01360 for(i=0; i<entries; i++) { 01361 sc->keyframes[i] = avio_rb32(pb); 01362 //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]); 01363 } 01364 return 0; 01365 } 01366 01367 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01368 { 01369 AVStream *st; 01370 MOVStreamContext *sc; 01371 unsigned int i, entries, sample_size, field_size, num_bytes; 01372 GetBitContext gb; 01373 unsigned char* buf; 01374 01375 if (c->fc->nb_streams < 1) 01376 return 0; 01377 st = c->fc->streams[c->fc->nb_streams-1]; 01378 sc = st->priv_data; 01379 01380 avio_r8(pb); /* version */ 01381 avio_rb24(pb); /* flags */ 01382 01383 if (atom.type == MKTAG('s','t','s','z')) { 01384 sample_size = avio_rb32(pb); 01385 if (!sc->sample_size) /* do not overwrite value computed in stsd */ 01386 sc->sample_size = sample_size; 01387 field_size = 32; 01388 } else { 01389 sample_size = 0; 01390 avio_rb24(pb); /* reserved */ 01391 field_size = avio_r8(pb); 01392 } 01393 entries = avio_rb32(pb); 01394 01395 av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries); 01396 01397 sc->sample_count = entries; 01398 if (sample_size) 01399 return 0; 01400 01401 if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) { 01402 av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size); 01403 return -1; 01404 } 01405 01406 if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size) 01407 return -1; 01408 sc->sample_sizes = av_malloc(entries * sizeof(int)); 01409 if (!sc->sample_sizes) 01410 return AVERROR(ENOMEM); 01411 01412 num_bytes = (entries*field_size+4)>>3; 01413 01414 buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE); 01415 if (!buf) { 01416 av_freep(&sc->sample_sizes); 01417 return AVERROR(ENOMEM); 01418 } 01419 01420 if (avio_read(pb, buf, num_bytes) < num_bytes) { 01421 av_freep(&sc->sample_sizes); 01422 av_free(buf); 01423 return -1; 01424 } 01425 01426 init_get_bits(&gb, buf, 8*num_bytes); 01427 01428 for(i=0; i<entries; i++) 01429 sc->sample_sizes[i] = get_bits_long(&gb, field_size); 01430 01431 av_free(buf); 01432 return 0; 01433 } 01434 01435 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01436 { 01437 AVStream *st; 01438 MOVStreamContext *sc; 01439 unsigned int i, entries; 01440 int64_t duration=0; 01441 int64_t total_sample_count=0; 01442 01443 if (c->fc->nb_streams < 1) 01444 return 0; 01445 st = c->fc->streams[c->fc->nb_streams-1]; 01446 sc = st->priv_data; 01447 01448 avio_r8(pb); /* version */ 01449 avio_rb24(pb); /* flags */ 01450 entries = avio_rb32(pb); 01451 01452 av_dlog(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries); 01453 01454 if(entries >= UINT_MAX / sizeof(*sc->stts_data)) 01455 return -1; 01456 sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data)); 01457 if (!sc->stts_data) 01458 return AVERROR(ENOMEM); 01459 sc->stts_count = entries; 01460 01461 for(i=0; i<entries; i++) { 01462 int sample_duration; 01463 int sample_count; 01464 01465 sample_count=avio_rb32(pb); 01466 sample_duration = avio_rb32(pb); 01467 sc->stts_data[i].count= sample_count; 01468 sc->stts_data[i].duration= sample_duration; 01469 01470 av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration); 01471 01472 duration+=(int64_t)sample_duration*sample_count; 01473 total_sample_count+=sample_count; 01474 } 01475 01476 st->nb_frames= total_sample_count; 01477 if(duration) 01478 st->duration= duration; 01479 return 0; 01480 } 01481 01482 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01483 { 01484 AVStream *st; 01485 MOVStreamContext *sc; 01486 unsigned int i, entries; 01487 01488 if (c->fc->nb_streams < 1) 01489 return 0; 01490 st = c->fc->streams[c->fc->nb_streams-1]; 01491 sc = st->priv_data; 01492 01493 avio_r8(pb); /* version */ 01494 avio_rb24(pb); /* flags */ 01495 entries = avio_rb32(pb); 01496 01497 av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries); 01498 01499 if(entries >= UINT_MAX / sizeof(*sc->ctts_data)) 01500 return -1; 01501 sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data)); 01502 if (!sc->ctts_data) 01503 return AVERROR(ENOMEM); 01504 sc->ctts_count = entries; 01505 01506 for(i=0; i<entries; i++) { 01507 int count =avio_rb32(pb); 01508 int duration =avio_rb32(pb); 01509 01510 sc->ctts_data[i].count = count; 01511 sc->ctts_data[i].duration= duration; 01512 if (duration < 0) 01513 sc->dts_shift = FFMAX(sc->dts_shift, -duration); 01514 } 01515 01516 av_dlog(c->fc, "dts shift %d\n", sc->dts_shift); 01517 01518 return 0; 01519 } 01520 01521 static void mov_build_index(MOVContext *mov, AVStream *st) 01522 { 01523 MOVStreamContext *sc = st->priv_data; 01524 int64_t current_offset; 01525 int64_t current_dts = 0; 01526 unsigned int stts_index = 0; 01527 unsigned int stsc_index = 0; 01528 unsigned int stss_index = 0; 01529 unsigned int stps_index = 0; 01530 unsigned int i, j; 01531 uint64_t stream_size = 0; 01532 01533 /* adjust first dts according to edit list */ 01534 if (sc->time_offset && mov->time_scale > 0) { 01535 if (sc->time_offset < 0) 01536 sc->time_offset = av_rescale(sc->time_offset, sc->time_scale, mov->time_scale); 01537 current_dts = -sc->time_offset; 01538 if (sc->ctts_data && sc->stts_data && 01539 sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) { 01540 /* more than 16 frames delay, dts are likely wrong 01541 this happens with files created by iMovie */ 01542 sc->wrong_dts = 1; 01543 st->codec->has_b_frames = 1; 01544 } 01545 } 01546 01547 /* only use old uncompressed audio chunk demuxing when stts specifies it */ 01548 if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && 01549 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) { 01550 unsigned int current_sample = 0; 01551 unsigned int stts_sample = 0; 01552 unsigned int sample_size; 01553 unsigned int distance = 0; 01554 int key_off = sc->keyframes && sc->keyframes[0] == 1; 01555 01556 current_dts -= sc->dts_shift; 01557 01558 if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries)) 01559 return; 01560 st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries)); 01561 if (!st->index_entries) 01562 return; 01563 st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries); 01564 01565 for (i = 0; i < sc->chunk_count; i++) { 01566 current_offset = sc->chunk_offsets[i]; 01567 while (stsc_index + 1 < sc->stsc_count && 01568 i + 1 == sc->stsc_data[stsc_index + 1].first) 01569 stsc_index++; 01570 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) { 01571 int keyframe = 0; 01572 if (current_sample >= sc->sample_count) { 01573 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n"); 01574 return; 01575 } 01576 01577 if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) { 01578 keyframe = 1; 01579 if (stss_index + 1 < sc->keyframe_count) 01580 stss_index++; 01581 } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) { 01582 keyframe = 1; 01583 if (stps_index + 1 < sc->stps_count) 01584 stps_index++; 01585 } 01586 if (keyframe) 01587 distance = 0; 01588 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample]; 01589 if(sc->pseudo_stream_id == -1 || 01590 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) { 01591 AVIndexEntry *e = &st->index_entries[st->nb_index_entries++]; 01592 e->pos = current_offset; 01593 e->timestamp = current_dts; 01594 e->size = sample_size; 01595 e->min_distance = distance; 01596 e->flags = keyframe ? AVINDEX_KEYFRAME : 0; 01597 av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", " 01598 "size %d, distance %d, keyframe %d\n", st->index, current_sample, 01599 current_offset, current_dts, sample_size, distance, keyframe); 01600 } 01601 01602 current_offset += sample_size; 01603 stream_size += sample_size; 01604 current_dts += sc->stts_data[stts_index].duration; 01605 distance++; 01606 stts_sample++; 01607 current_sample++; 01608 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) { 01609 stts_sample = 0; 01610 stts_index++; 01611 } 01612 } 01613 } 01614 if (st->duration > 0) 01615 st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration; 01616 } else { 01617 unsigned chunk_samples, total = 0; 01618 01619 // compute total chunk count 01620 for (i = 0; i < sc->stsc_count; i++) { 01621 unsigned count, chunk_count; 01622 01623 chunk_samples = sc->stsc_data[i].count; 01624 if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) { 01625 av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n"); 01626 return; 01627 } 01628 01629 if (sc->samples_per_frame >= 160) { // gsm 01630 count = chunk_samples / sc->samples_per_frame; 01631 } else if (sc->samples_per_frame > 1) { 01632 unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame; 01633 count = (chunk_samples+samples-1) / samples; 01634 } else { 01635 count = (chunk_samples+1023) / 1024; 01636 } 01637 01638 if (i < sc->stsc_count - 1) 01639 chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first; 01640 else 01641 chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1); 01642 total += chunk_count * count; 01643 } 01644 01645 av_dlog(mov->fc, "chunk count %d\n", total); 01646 if (total >= UINT_MAX / sizeof(*st->index_entries)) 01647 return; 01648 st->index_entries = av_malloc(total*sizeof(*st->index_entries)); 01649 if (!st->index_entries) 01650 return; 01651 st->index_entries_allocated_size = total*sizeof(*st->index_entries); 01652 01653 // populate index 01654 for (i = 0; i < sc->chunk_count; i++) { 01655 current_offset = sc->chunk_offsets[i]; 01656 if (stsc_index + 1 < sc->stsc_count && 01657 i + 1 == sc->stsc_data[stsc_index + 1].first) 01658 stsc_index++; 01659 chunk_samples = sc->stsc_data[stsc_index].count; 01660 01661 while (chunk_samples > 0) { 01662 AVIndexEntry *e; 01663 unsigned size, samples; 01664 01665 if (sc->samples_per_frame >= 160) { // gsm 01666 samples = sc->samples_per_frame; 01667 size = sc->bytes_per_frame; 01668 } else { 01669 if (sc->samples_per_frame > 1) { 01670 samples = FFMIN((1024 / sc->samples_per_frame)* 01671 sc->samples_per_frame, chunk_samples); 01672 size = (samples / sc->samples_per_frame) * sc->bytes_per_frame; 01673 } else { 01674 samples = FFMIN(1024, chunk_samples); 01675 size = samples * sc->sample_size; 01676 } 01677 } 01678 01679 if (st->nb_index_entries >= total) { 01680 av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total); 01681 return; 01682 } 01683 e = &st->index_entries[st->nb_index_entries++]; 01684 e->pos = current_offset; 01685 e->timestamp = current_dts; 01686 e->size = size; 01687 e->min_distance = 0; 01688 e->flags = AVINDEX_KEYFRAME; 01689 av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", " 01690 "size %d, duration %d\n", st->index, i, current_offset, current_dts, 01691 size, samples); 01692 01693 current_offset += size; 01694 current_dts += samples; 01695 chunk_samples -= samples; 01696 } 01697 } 01698 } 01699 } 01700 01701 static int mov_open_dref(AVIOContext **pb, char *src, MOVDref *ref) 01702 { 01703 /* try relative path, we do not try the absolute because it can leak information about our 01704 system to an attacker */ 01705 if (ref->nlvl_to > 0 && ref->nlvl_from > 0) { 01706 char filename[1024]; 01707 char *src_path; 01708 int i, l; 01709 01710 /* find a source dir */ 01711 src_path = strrchr(src, '/'); 01712 if (src_path) 01713 src_path++; 01714 else 01715 src_path = src; 01716 01717 /* find a next level down to target */ 01718 for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--) 01719 if (ref->path[l] == '/') { 01720 if (i == ref->nlvl_to - 1) 01721 break; 01722 else 01723 i++; 01724 } 01725 01726 /* compose filename if next level down to target was found */ 01727 if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) { 01728 memcpy(filename, src, src_path - src); 01729 filename[src_path - src] = 0; 01730 01731 for (i = 1; i < ref->nlvl_from; i++) 01732 av_strlcat(filename, "../", 1024); 01733 01734 av_strlcat(filename, ref->path + l + 1, 1024); 01735 01736 if (!avio_open(pb, filename, AVIO_FLAG_READ)) 01737 return 0; 01738 } 01739 } 01740 01741 return AVERROR(ENOENT); 01742 } 01743 01744 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01745 { 01746 AVStream *st; 01747 MOVStreamContext *sc; 01748 int ret; 01749 01750 st = av_new_stream(c->fc, c->fc->nb_streams); 01751 if (!st) return AVERROR(ENOMEM); 01752 sc = av_mallocz(sizeof(MOVStreamContext)); 01753 if (!sc) return AVERROR(ENOMEM); 01754 01755 st->priv_data = sc; 01756 st->codec->codec_type = AVMEDIA_TYPE_DATA; 01757 sc->ffindex = st->index; 01758 01759 if ((ret = mov_read_default(c, pb, atom)) < 0) 01760 return ret; 01761 01762 /* sanity checks */ 01763 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count || 01764 (!sc->sample_size && !sc->sample_count))) { 01765 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n", 01766 st->index); 01767 return 0; 01768 } 01769 01770 if (sc->time_scale <= 0) { 01771 av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index); 01772 sc->time_scale = c->time_scale; 01773 if (sc->time_scale <= 0) 01774 sc->time_scale = 1; 01775 } 01776 01777 av_set_pts_info(st, 64, 1, sc->time_scale); 01778 01779 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && 01780 !st->codec->frame_size && sc->stts_count == 1) { 01781 st->codec->frame_size = av_rescale(sc->stts_data[0].duration, 01782 st->codec->sample_rate, sc->time_scale); 01783 av_dlog(c->fc, "frame size %d\n", st->codec->frame_size); 01784 } 01785 01786 mov_build_index(c, st); 01787 01788 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) { 01789 MOVDref *dref = &sc->drefs[sc->dref_id - 1]; 01790 if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0) 01791 av_log(c->fc, AV_LOG_ERROR, 01792 "stream %d, error opening alias: path='%s', dir='%s', " 01793 "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n", 01794 st->index, dref->path, dref->dir, dref->filename, 01795 dref->volume, dref->nlvl_from, dref->nlvl_to); 01796 } else 01797 sc->pb = c->fc->pb; 01798 01799 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 01800 if (!st->sample_aspect_ratio.num && 01801 (st->codec->width != sc->width || st->codec->height != sc->height)) { 01802 st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) / 01803 ((double)st->codec->width * sc->height), INT_MAX); 01804 } 01805 01806 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, 01807 sc->time_scale*st->nb_frames, st->duration, INT_MAX); 01808 01809 if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1)) 01810 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, 01811 sc->time_scale, sc->stts_data[0].duration, INT_MAX); 01812 } 01813 01814 switch (st->codec->codec_id) { 01815 #if CONFIG_H261_DECODER 01816 case CODEC_ID_H261: 01817 #endif 01818 #if CONFIG_H263_DECODER 01819 case CODEC_ID_H263: 01820 #endif 01821 #if CONFIG_H264_DECODER 01822 case CODEC_ID_H264: 01823 #endif 01824 #if CONFIG_MPEG4_DECODER 01825 case CODEC_ID_MPEG4: 01826 #endif 01827 st->codec->width = 0; /* let decoder init width/height */ 01828 st->codec->height= 0; 01829 break; 01830 } 01831 01832 /* Do not need those anymore. */ 01833 av_freep(&sc->chunk_offsets); 01834 av_freep(&sc->stsc_data); 01835 av_freep(&sc->sample_sizes); 01836 av_freep(&sc->keyframes); 01837 av_freep(&sc->stts_data); 01838 av_freep(&sc->stps_data); 01839 01840 return 0; 01841 } 01842 01843 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01844 { 01845 int ret; 01846 c->itunes_metadata = 1; 01847 ret = mov_read_default(c, pb, atom); 01848 c->itunes_metadata = 0; 01849 return ret; 01850 } 01851 01852 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01853 { 01854 while (atom.size > 8) { 01855 uint32_t tag = avio_rl32(pb); 01856 atom.size -= 4; 01857 if (tag == MKTAG('h','d','l','r')) { 01858 avio_seek(pb, -8, SEEK_CUR); 01859 atom.size += 8; 01860 return mov_read_default(c, pb, atom); 01861 } 01862 } 01863 return 0; 01864 } 01865 01866 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01867 { 01868 int i; 01869 int width; 01870 int height; 01871 int64_t disp_transform[2]; 01872 int display_matrix[3][2]; 01873 AVStream *st; 01874 MOVStreamContext *sc; 01875 int version; 01876 01877 if (c->fc->nb_streams < 1) 01878 return 0; 01879 st = c->fc->streams[c->fc->nb_streams-1]; 01880 sc = st->priv_data; 01881 01882 version = avio_r8(pb); 01883 avio_rb24(pb); /* flags */ 01884 /* 01885 MOV_TRACK_ENABLED 0x0001 01886 MOV_TRACK_IN_MOVIE 0x0002 01887 MOV_TRACK_IN_PREVIEW 0x0004 01888 MOV_TRACK_IN_POSTER 0x0008 01889 */ 01890 01891 if (version == 1) { 01892 avio_rb64(pb); 01893 avio_rb64(pb); 01894 } else { 01895 avio_rb32(pb); /* creation time */ 01896 avio_rb32(pb); /* modification time */ 01897 } 01898 st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/ 01899 avio_rb32(pb); /* reserved */ 01900 01901 /* highlevel (considering edits) duration in movie timebase */ 01902 (version == 1) ? avio_rb64(pb) : avio_rb32(pb); 01903 avio_rb32(pb); /* reserved */ 01904 avio_rb32(pb); /* reserved */ 01905 01906 avio_rb16(pb); /* layer */ 01907 avio_rb16(pb); /* alternate group */ 01908 avio_rb16(pb); /* volume */ 01909 avio_rb16(pb); /* reserved */ 01910 01911 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2) 01912 // they're kept in fixed point format through all calculations 01913 // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio 01914 for (i = 0; i < 3; i++) { 01915 display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point 01916 display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point 01917 avio_rb32(pb); // 2.30 fixed point (not used) 01918 } 01919 01920 width = avio_rb32(pb); // 16.16 fixed point track width 01921 height = avio_rb32(pb); // 16.16 fixed point track height 01922 sc->width = width >> 16; 01923 sc->height = height >> 16; 01924 01925 // transform the display width/height according to the matrix 01926 // skip this if the display matrix is the default identity matrix 01927 // or if it is rotating the picture, ex iPhone 3GS 01928 // to keep the same scale, use [width height 1<<16] 01929 if (width && height && 01930 ((display_matrix[0][0] != 65536 || 01931 display_matrix[1][1] != 65536) && 01932 !display_matrix[0][1] && 01933 !display_matrix[1][0] && 01934 !display_matrix[2][0] && !display_matrix[2][1])) { 01935 for (i = 0; i < 2; i++) 01936 disp_transform[i] = 01937 (int64_t) width * display_matrix[0][i] + 01938 (int64_t) height * display_matrix[1][i] + 01939 ((int64_t) display_matrix[2][i] << 16); 01940 01941 //sample aspect ratio is new width/height divided by old width/height 01942 st->sample_aspect_ratio = av_d2q( 01943 ((double) disp_transform[0] * height) / 01944 ((double) disp_transform[1] * width), INT_MAX); 01945 } 01946 return 0; 01947 } 01948 01949 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01950 { 01951 MOVFragment *frag = &c->fragment; 01952 MOVTrackExt *trex = NULL; 01953 int flags, track_id, i; 01954 01955 avio_r8(pb); /* version */ 01956 flags = avio_rb24(pb); 01957 01958 track_id = avio_rb32(pb); 01959 if (!track_id) 01960 return -1; 01961 frag->track_id = track_id; 01962 for (i = 0; i < c->trex_count; i++) 01963 if (c->trex_data[i].track_id == frag->track_id) { 01964 trex = &c->trex_data[i]; 01965 break; 01966 } 01967 if (!trex) { 01968 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n"); 01969 return -1; 01970 } 01971 01972 if (flags & 0x01) frag->base_data_offset = avio_rb64(pb); 01973 else frag->base_data_offset = frag->moof_offset; 01974 if (flags & 0x02) frag->stsd_id = avio_rb32(pb); 01975 else frag->stsd_id = trex->stsd_id; 01976 01977 frag->duration = flags & 0x08 ? avio_rb32(pb) : trex->duration; 01978 frag->size = flags & 0x10 ? avio_rb32(pb) : trex->size; 01979 frag->flags = flags & 0x20 ? avio_rb32(pb) : trex->flags; 01980 av_dlog(c->fc, "frag flags 0x%x\n", frag->flags); 01981 return 0; 01982 } 01983 01984 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01985 { 01986 c->chapter_track = avio_rb32(pb); 01987 return 0; 01988 } 01989 01990 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom) 01991 { 01992 MOVTrackExt *trex; 01993 01994 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data)) 01995 return -1; 01996 trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data)); 01997 if (!trex) 01998 return AVERROR(ENOMEM); 01999 c->trex_data = trex; 02000 trex = &c->trex_data[c->trex_count++]; 02001 avio_r8(pb); /* version */ 02002 avio_rb24(pb); /* flags */ 02003 trex->track_id = avio_rb32(pb); 02004 trex->stsd_id = avio_rb32(pb); 02005 trex->duration = avio_rb32(pb); 02006 trex->size = avio_rb32(pb); 02007 trex->flags = avio_rb32(pb); 02008 return 0; 02009 } 02010 02011 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom) 02012 { 02013 MOVFragment *frag = &c->fragment; 02014 AVStream *st = NULL; 02015 MOVStreamContext *sc; 02016 MOVStts *ctts_data; 02017 uint64_t offset; 02018 int64_t dts; 02019 int data_offset = 0; 02020 unsigned entries, first_sample_flags = frag->flags; 02021 int flags, distance, i; 02022 02023 for (i = 0; i < c->fc->nb_streams; i++) { 02024 if (c->fc->streams[i]->id == frag->track_id) { 02025 st = c->fc->streams[i]; 02026 break; 02027 } 02028 } 02029 if (!st) { 02030 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id); 02031 return -1; 02032 } 02033 sc = st->priv_data; 02034 if (sc->pseudo_stream_id+1 != frag->stsd_id) 02035 return 0; 02036 avio_r8(pb); /* version */ 02037 flags = avio_rb24(pb); 02038 entries = avio_rb32(pb); 02039 av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries); 02040 02041 /* Always assume the presence of composition time offsets. 02042 * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following. 02043 * 1) in the initial movie, there are no samples. 02044 * 2) in the first movie fragment, there is only one sample without composition time offset. 02045 * 3) in the subsequent movie fragments, there are samples with composition time offset. */ 02046 if (!sc->ctts_count && sc->sample_count) 02047 { 02048 /* Complement ctts table if moov atom doesn't have ctts atom. */ 02049 ctts_data = av_malloc(sizeof(*sc->ctts_data)); 02050 if (!ctts_data) 02051 return AVERROR(ENOMEM); 02052 sc->ctts_data = ctts_data; 02053 sc->ctts_data[sc->ctts_count].count = sc->sample_count; 02054 sc->ctts_data[sc->ctts_count].duration = 0; 02055 sc->ctts_count++; 02056 } 02057 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data)) 02058 return -1; 02059 ctts_data = av_realloc(sc->ctts_data, 02060 (entries+sc->ctts_count)*sizeof(*sc->ctts_data)); 02061 if (!ctts_data) 02062 return AVERROR(ENOMEM); 02063 sc->ctts_data = ctts_data; 02064 02065 if (flags & 0x001) data_offset = avio_rb32(pb); 02066 if (flags & 0x004) first_sample_flags = avio_rb32(pb); 02067 dts = st->duration - sc->time_offset; 02068 offset = frag->base_data_offset + data_offset; 02069 distance = 0; 02070 av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags); 02071 for (i = 0; i < entries; i++) { 02072 unsigned sample_size = frag->size; 02073 int sample_flags = i ? frag->flags : first_sample_flags; 02074 unsigned sample_duration = frag->duration; 02075 int keyframe; 02076 02077 if (flags & 0x100) sample_duration = avio_rb32(pb); 02078 if (flags & 0x200) sample_size = avio_rb32(pb); 02079 if (flags & 0x400) sample_flags = avio_rb32(pb); 02080 sc->ctts_data[sc->ctts_count].count = 1; 02081 sc->ctts_data[sc->ctts_count].duration = (flags & 0x800) ? avio_rb32(pb) : 0; 02082 sc->ctts_count++; 02083 if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO || 02084 (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000)) 02085 distance = 0; 02086 av_add_index_entry(st, offset, dts, sample_size, distance, 02087 keyframe ? AVINDEX_KEYFRAME : 0); 02088 av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", " 02089 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i, 02090 offset, dts, sample_size, distance, keyframe); 02091 distance++; 02092 dts += sample_duration; 02093 offset += sample_size; 02094 } 02095 frag->moof_offset = offset; 02096 st->duration = dts + sc->time_offset; 02097 return 0; 02098 } 02099 02100 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */ 02101 /* like the files created with Adobe Premiere 5.0, for samples see */ 02102 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */ 02103 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom) 02104 { 02105 int err; 02106 02107 if (atom.size < 8) 02108 return 0; /* continue */ 02109 if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */ 02110 avio_skip(pb, atom.size - 4); 02111 return 0; 02112 } 02113 atom.type = avio_rl32(pb); 02114 atom.size -= 8; 02115 if (atom.type != MKTAG('m','d','a','t')) { 02116 avio_skip(pb, atom.size); 02117 return 0; 02118 } 02119 err = mov_read_mdat(c, pb, atom); 02120 return err; 02121 } 02122 02123 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom) 02124 { 02125 #if CONFIG_ZLIB 02126 AVIOContext ctx; 02127 uint8_t *cmov_data; 02128 uint8_t *moov_data; /* uncompressed data */ 02129 long cmov_len, moov_len; 02130 int ret = -1; 02131 02132 avio_rb32(pb); /* dcom atom */ 02133 if (avio_rl32(pb) != MKTAG('d','c','o','m')) 02134 return -1; 02135 if (avio_rl32(pb) != MKTAG('z','l','i','b')) { 02136 av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !"); 02137 return -1; 02138 } 02139 avio_rb32(pb); /* cmvd atom */ 02140 if (avio_rl32(pb) != MKTAG('c','m','v','d')) 02141 return -1; 02142 moov_len = avio_rb32(pb); /* uncompressed size */ 02143 cmov_len = atom.size - 6 * 4; 02144 02145 cmov_data = av_malloc(cmov_len); 02146 if (!cmov_data) 02147 return AVERROR(ENOMEM); 02148 moov_data = av_malloc(moov_len); 02149 if (!moov_data) { 02150 av_free(cmov_data); 02151 return AVERROR(ENOMEM); 02152 } 02153 avio_read(pb, cmov_data, cmov_len); 02154 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK) 02155 goto free_and_return; 02156 if(ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0) 02157 goto free_and_return; 02158 atom.type = MKTAG('m','o','o','v'); 02159 atom.size = moov_len; 02160 ret = mov_read_default(c, &ctx, atom); 02161 free_and_return: 02162 av_free(moov_data); 02163 av_free(cmov_data); 02164 return ret; 02165 #else 02166 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n"); 02167 return -1; 02168 #endif 02169 } 02170 02171 /* edit list atom */ 02172 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom) 02173 { 02174 MOVStreamContext *sc; 02175 int i, edit_count, version; 02176 02177 if (c->fc->nb_streams < 1) 02178 return 0; 02179 sc = c->fc->streams[c->fc->nb_streams-1]->priv_data; 02180 02181 version = avio_r8(pb); /* version */ 02182 avio_rb24(pb); /* flags */ 02183 edit_count = avio_rb32(pb); /* entries */ 02184 02185 if((uint64_t)edit_count*12+8 > atom.size) 02186 return -1; 02187 02188 for(i=0; i<edit_count; i++){ 02189 int64_t time; 02190 int64_t duration; 02191 if (version == 1) { 02192 duration = avio_rb64(pb); 02193 time = avio_rb64(pb); 02194 } else { 02195 duration = avio_rb32(pb); /* segment duration */ 02196 time = (int32_t)avio_rb32(pb); /* media time */ 02197 } 02198 avio_rb32(pb); /* Media rate */ 02199 if (i == 0 && time >= -1) { 02200 sc->time_offset = time != -1 ? time : -duration; 02201 } 02202 } 02203 02204 if(edit_count > 1) 02205 av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, " 02206 "a/v desync might occur, patch welcome\n"); 02207 02208 av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count); 02209 return 0; 02210 } 02211 02212 static const MOVParseTableEntry mov_default_parse_table[] = { 02213 { MKTAG('a','v','s','s'), mov_read_extradata }, 02214 { MKTAG('c','h','p','l'), mov_read_chpl }, 02215 { MKTAG('c','o','6','4'), mov_read_stco }, 02216 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */ 02217 { MKTAG('d','i','n','f'), mov_read_default }, 02218 { MKTAG('d','r','e','f'), mov_read_dref }, 02219 { MKTAG('e','d','t','s'), mov_read_default }, 02220 { MKTAG('e','l','s','t'), mov_read_elst }, 02221 { MKTAG('e','n','d','a'), mov_read_enda }, 02222 { MKTAG('f','i','e','l'), mov_read_extradata }, 02223 { MKTAG('f','t','y','p'), mov_read_ftyp }, 02224 { MKTAG('g','l','b','l'), mov_read_glbl }, 02225 { MKTAG('h','d','l','r'), mov_read_hdlr }, 02226 { MKTAG('i','l','s','t'), mov_read_ilst }, 02227 { MKTAG('j','p','2','h'), mov_read_extradata }, 02228 { MKTAG('m','d','a','t'), mov_read_mdat }, 02229 { MKTAG('m','d','h','d'), mov_read_mdhd }, 02230 { MKTAG('m','d','i','a'), mov_read_default }, 02231 { MKTAG('m','e','t','a'), mov_read_meta }, 02232 { MKTAG('m','i','n','f'), mov_read_default }, 02233 { MKTAG('m','o','o','f'), mov_read_moof }, 02234 { MKTAG('m','o','o','v'), mov_read_moov }, 02235 { MKTAG('m','v','e','x'), mov_read_default }, 02236 { MKTAG('m','v','h','d'), mov_read_mvhd }, 02237 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */ 02238 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */ 02239 { MKTAG('a','v','c','C'), mov_read_glbl }, 02240 { MKTAG('p','a','s','p'), mov_read_pasp }, 02241 { MKTAG('s','t','b','l'), mov_read_default }, 02242 { MKTAG('s','t','c','o'), mov_read_stco }, 02243 { MKTAG('s','t','p','s'), mov_read_stps }, 02244 { MKTAG('s','t','r','f'), mov_read_strf }, 02245 { MKTAG('s','t','s','c'), mov_read_stsc }, 02246 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */ 02247 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */ 02248 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */ 02249 { MKTAG('s','t','t','s'), mov_read_stts }, 02250 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */ 02251 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */ 02252 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */ 02253 { MKTAG('t','r','a','k'), mov_read_trak }, 02254 { MKTAG('t','r','a','f'), mov_read_default }, 02255 { MKTAG('t','r','e','f'), mov_read_default }, 02256 { MKTAG('c','h','a','p'), mov_read_chap }, 02257 { MKTAG('t','r','e','x'), mov_read_trex }, 02258 { MKTAG('t','r','u','n'), mov_read_trun }, 02259 { MKTAG('u','d','t','a'), mov_read_default }, 02260 { MKTAG('w','a','v','e'), mov_read_wave }, 02261 { MKTAG('e','s','d','s'), mov_read_esds }, 02262 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */ 02263 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */ 02264 { MKTAG('w','f','e','x'), mov_read_wfex }, 02265 { MKTAG('c','m','o','v'), mov_read_cmov }, 02266 { 0, NULL } 02267 }; 02268 02269 static int mov_probe(AVProbeData *p) 02270 { 02271 unsigned int offset; 02272 uint32_t tag; 02273 int score = 0; 02274 02275 /* check file header */ 02276 offset = 0; 02277 for(;;) { 02278 /* ignore invalid offset */ 02279 if ((offset + 8) > (unsigned int)p->buf_size) 02280 return score; 02281 tag = AV_RL32(p->buf + offset + 4); 02282 switch(tag) { 02283 /* check for obvious tags */ 02284 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */ 02285 case MKTAG('m','o','o','v'): 02286 case MKTAG('m','d','a','t'): 02287 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */ 02288 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */ 02289 case MKTAG('f','t','y','p'): 02290 return AVPROBE_SCORE_MAX; 02291 /* those are more common words, so rate then a bit less */ 02292 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */ 02293 case MKTAG('w','i','d','e'): 02294 case MKTAG('f','r','e','e'): 02295 case MKTAG('j','u','n','k'): 02296 case MKTAG('p','i','c','t'): 02297 return AVPROBE_SCORE_MAX - 5; 02298 case MKTAG(0x82,0x82,0x7f,0x7d): 02299 case MKTAG('s','k','i','p'): 02300 case MKTAG('u','u','i','d'): 02301 case MKTAG('p','r','f','l'): 02302 offset = AV_RB32(p->buf+offset) + offset; 02303 /* if we only find those cause probedata is too small at least rate them */ 02304 score = AVPROBE_SCORE_MAX - 50; 02305 break; 02306 default: 02307 /* unrecognized tag */ 02308 return score; 02309 } 02310 } 02311 return score; 02312 } 02313 02314 // must be done after parsing all trak because there's no order requirement 02315 static void mov_read_chapters(AVFormatContext *s) 02316 { 02317 MOVContext *mov = s->priv_data; 02318 AVStream *st = NULL; 02319 MOVStreamContext *sc; 02320 int64_t cur_pos; 02321 int i; 02322 02323 for (i = 0; i < s->nb_streams; i++) 02324 if (s->streams[i]->id == mov->chapter_track) { 02325 st = s->streams[i]; 02326 break; 02327 } 02328 if (!st) { 02329 av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n"); 02330 return; 02331 } 02332 02333 st->discard = AVDISCARD_ALL; 02334 sc = st->priv_data; 02335 cur_pos = avio_tell(sc->pb); 02336 02337 for (i = 0; i < st->nb_index_entries; i++) { 02338 AVIndexEntry *sample = &st->index_entries[i]; 02339 int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration; 02340 uint8_t *title; 02341 uint16_t ch; 02342 int len, title_len; 02343 02344 if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) { 02345 av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i); 02346 goto finish; 02347 } 02348 02349 // the first two bytes are the length of the title 02350 len = avio_rb16(sc->pb); 02351 if (len > sample->size-2) 02352 continue; 02353 title_len = 2*len + 1; 02354 if (!(title = av_mallocz(title_len))) 02355 goto finish; 02356 02357 // The samples could theoretically be in any encoding if there's an encd 02358 // atom following, but in practice are only utf-8 or utf-16, distinguished 02359 // instead by the presence of a BOM 02360 ch = avio_rb16(sc->pb); 02361 if (ch == 0xfeff) 02362 avio_get_str16be(sc->pb, len, title, title_len); 02363 else if (ch == 0xfffe) 02364 avio_get_str16le(sc->pb, len, title, title_len); 02365 else { 02366 AV_WB16(title, ch); 02367 avio_get_str(sc->pb, len - 2, title + 2, title_len - 2); 02368 } 02369 02370 ff_new_chapter(s, i, st->time_base, sample->timestamp, end, title); 02371 av_freep(&title); 02372 } 02373 finish: 02374 avio_seek(sc->pb, cur_pos, SEEK_SET); 02375 } 02376 02377 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap) 02378 { 02379 MOVContext *mov = s->priv_data; 02380 AVIOContext *pb = s->pb; 02381 int err; 02382 MOVAtom atom = { AV_RL32("root") }; 02383 02384 mov->fc = s; 02385 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */ 02386 if(pb->seekable) 02387 atom.size = avio_size(pb); 02388 else 02389 atom.size = INT64_MAX; 02390 02391 /* check MOV header */ 02392 if ((err = mov_read_default(mov, pb, atom)) < 0) { 02393 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err); 02394 return err; 02395 } 02396 if (!mov->found_moov) { 02397 av_log(s, AV_LOG_ERROR, "moov atom not found\n"); 02398 return -1; 02399 } 02400 av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb)); 02401 02402 if (pb->seekable && mov->chapter_track > 0) 02403 mov_read_chapters(s); 02404 02405 return 0; 02406 } 02407 02408 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st) 02409 { 02410 AVIndexEntry *sample = NULL; 02411 int64_t best_dts = INT64_MAX; 02412 int i; 02413 for (i = 0; i < s->nb_streams; i++) { 02414 AVStream *avst = s->streams[i]; 02415 MOVStreamContext *msc = avst->priv_data; 02416 if (msc->pb && msc->current_sample < avst->nb_index_entries) { 02417 AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample]; 02418 int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale); 02419 av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts); 02420 if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) || 02421 (s->pb->seekable && 02422 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb && 02423 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) || 02424 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) { 02425 sample = current_sample; 02426 best_dts = dts; 02427 *st = avst; 02428 } 02429 } 02430 } 02431 return sample; 02432 } 02433 02434 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt) 02435 { 02436 MOVContext *mov = s->priv_data; 02437 MOVStreamContext *sc; 02438 AVIndexEntry *sample; 02439 AVStream *st = NULL; 02440 int ret; 02441 retry: 02442 sample = mov_find_next_sample(s, &st); 02443 if (!sample) { 02444 mov->found_mdat = 0; 02445 if (s->pb->seekable|| 02446 mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 || 02447 s->pb->eof_reached) 02448 return AVERROR_EOF; 02449 av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb)); 02450 goto retry; 02451 } 02452 sc = st->priv_data; 02453 /* must be done just before reading, to avoid infinite loop on sample */ 02454 sc->current_sample++; 02455 02456 if (st->discard != AVDISCARD_ALL) { 02457 if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) { 02458 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n", 02459 sc->ffindex, sample->pos); 02460 return -1; 02461 } 02462 ret = av_get_packet(sc->pb, pkt, sample->size); 02463 if (ret < 0) 02464 return ret; 02465 if (sc->has_palette) { 02466 uint8_t *pal; 02467 02468 pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE); 02469 if (!pal) { 02470 av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n"); 02471 } else { 02472 memcpy(pal, sc->palette, AVPALETTE_SIZE); 02473 sc->has_palette = 0; 02474 } 02475 } 02476 #if CONFIG_DV_DEMUXER 02477 if (mov->dv_demux && sc->dv_audio_container) { 02478 dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size); 02479 av_free(pkt->data); 02480 pkt->size = 0; 02481 ret = dv_get_packet(mov->dv_demux, pkt); 02482 if (ret < 0) 02483 return ret; 02484 } 02485 #endif 02486 } 02487 02488 pkt->stream_index = sc->ffindex; 02489 pkt->dts = sample->timestamp; 02490 if (sc->ctts_data) { 02491 pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration; 02492 /* update ctts context */ 02493 sc->ctts_sample++; 02494 if (sc->ctts_index < sc->ctts_count && 02495 sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) { 02496 sc->ctts_index++; 02497 sc->ctts_sample = 0; 02498 } 02499 if (sc->wrong_dts) 02500 pkt->dts = AV_NOPTS_VALUE; 02501 } else { 02502 int64_t next_dts = (sc->current_sample < st->nb_index_entries) ? 02503 st->index_entries[sc->current_sample].timestamp : st->duration; 02504 pkt->duration = next_dts - pkt->dts; 02505 pkt->pts = pkt->dts; 02506 } 02507 if (st->discard == AVDISCARD_ALL) 02508 goto retry; 02509 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0; 02510 pkt->pos = sample->pos; 02511 av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n", 02512 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration); 02513 return 0; 02514 } 02515 02516 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags) 02517 { 02518 MOVStreamContext *sc = st->priv_data; 02519 int sample, time_sample; 02520 int i; 02521 02522 sample = av_index_search_timestamp(st, timestamp, flags); 02523 av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample); 02524 if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp) 02525 sample = 0; 02526 if (sample < 0) /* not sure what to do */ 02527 return -1; 02528 sc->current_sample = sample; 02529 av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample); 02530 /* adjust ctts index */ 02531 if (sc->ctts_data) { 02532 time_sample = 0; 02533 for (i = 0; i < sc->ctts_count; i++) { 02534 int next = time_sample + sc->ctts_data[i].count; 02535 if (next > sc->current_sample) { 02536 sc->ctts_index = i; 02537 sc->ctts_sample = sc->current_sample - time_sample; 02538 break; 02539 } 02540 time_sample = next; 02541 } 02542 } 02543 return sample; 02544 } 02545 02546 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) 02547 { 02548 AVStream *st; 02549 int64_t seek_timestamp, timestamp; 02550 int sample; 02551 int i; 02552 02553 if (stream_index >= s->nb_streams) 02554 return -1; 02555 if (sample_time < 0) 02556 sample_time = 0; 02557 02558 st = s->streams[stream_index]; 02559 sample = mov_seek_stream(s, st, sample_time, flags); 02560 if (sample < 0) 02561 return -1; 02562 02563 /* adjust seek timestamp to found sample timestamp */ 02564 seek_timestamp = st->index_entries[sample].timestamp; 02565 02566 for (i = 0; i < s->nb_streams; i++) { 02567 st = s->streams[i]; 02568 if (stream_index == i) 02569 continue; 02570 02571 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base); 02572 mov_seek_stream(s, st, timestamp, flags); 02573 } 02574 return 0; 02575 } 02576 02577 static int mov_read_close(AVFormatContext *s) 02578 { 02579 MOVContext *mov = s->priv_data; 02580 int i, j; 02581 02582 for (i = 0; i < s->nb_streams; i++) { 02583 AVStream *st = s->streams[i]; 02584 MOVStreamContext *sc = st->priv_data; 02585 02586 av_freep(&sc->ctts_data); 02587 for (j = 0; j < sc->drefs_count; j++) { 02588 av_freep(&sc->drefs[j].path); 02589 av_freep(&sc->drefs[j].dir); 02590 } 02591 av_freep(&sc->drefs); 02592 if (sc->pb && sc->pb != s->pb) 02593 avio_close(sc->pb); 02594 02595 av_freep(&st->codec->palctrl); 02596 } 02597 02598 if (mov->dv_demux) { 02599 for(i = 0; i < mov->dv_fctx->nb_streams; i++) { 02600 av_freep(&mov->dv_fctx->streams[i]->codec); 02601 av_freep(&mov->dv_fctx->streams[i]); 02602 } 02603 av_freep(&mov->dv_fctx); 02604 av_freep(&mov->dv_demux); 02605 } 02606 02607 av_freep(&mov->trex_data); 02608 02609 return 0; 02610 } 02611 02612 AVInputFormat ff_mov_demuxer = { 02613 "mov,mp4,m4a,3gp,3g2,mj2", 02614 NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"), 02615 sizeof(MOVContext), 02616 mov_probe, 02617 mov_read_header, 02618 mov_read_packet, 02619 mov_read_close, 02620 mov_read_seek, 02621 };