/* * MOV demuxer * Copyright (c) 2001 Fabrice Bellard * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <limits.h> //#define DEBUG //#define DEBUG_METADATA //#define MOV_EXPORT_ALL_METADATA #include "libavutil/intreadwrite.h" #include "libavutil/avstring.h" #include "avformat.h" #include "riff.h" #include "isom.h" #include "libavcodec/get_bits.h" #if CONFIG_ZLIB #include <zlib.h> #endif /* * First version by Francois Revol revol@free.fr * Seek function by Gael Chardon gael.dev@4now.net * * Features and limitations: * - reads most of the QT files I have (at least the structure), * Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html * - the code is quite ugly... maybe I won't do it recursive next time :-) * * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/ * when coding this :) (it's a writer anyway) * * Reference documents: * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt * Apple: * http://developer.apple.com/documentation/QuickTime/QTFF/ * http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf * QuickTime is a trademark of Apple (AFAIK :)) */ #include "qtpalette.h" #undef NDEBUG #include <assert.h> /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */ /* those functions parse an atom */ /* return code: 0: continue to parse next atom <0: error occurred, exit */ /* links atom IDs to parse functions */ typedef struct MOVParseTableEntry { uint32_t type; int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom); } MOVParseTableEntry; static const MOVParseTableEntry mov_default_parse_table[]; static int mov_metadata_trkn(MOVContext *c, ByteIOContext *pb, unsigned len) { char buf[16]; get_be16(pb); // unknown snprintf(buf, sizeof(buf), "%d", get_be16(pb)); av_metadata_set2(&c->fc->metadata, "track", buf, 0); get_be16(pb); // total tracks return 0; } static const uint32_t mac_to_unicode[128] = { 0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1, 0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8, 0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3, 0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC, 0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF, 0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8, 0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211, 0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8, 0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB, 0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153, 0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA, 0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02, 0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1, 0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4, 0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC, 0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7, }; static int mov_read_mac_string(MOVContext *c, ByteIOContext *pb, int len, char *dst, int dstlen) { char *p = dst; char *end = dst+dstlen-1; int i; for (i = 0; i < len; i++) { uint8_t t, c = get_byte(pb); if (c < 0x80 && p < end) *p++ = c; else PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;); } *p = 0; return p - dst; } static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { #ifdef MOV_EXPORT_ALL_METADATA char tmp_key[5]; #endif char str[1024], key2[16], language[4] = {0}; const char *key = NULL; uint16_t str_size, langcode = 0; uint32_t data_type = 0; int (*parse)(MOVContext*, ByteIOContext*, unsigned) = NULL; switch (atom.type) { case MKTAG(0xa9,'n','a','m'): key = "title"; break; case MKTAG(0xa9,'a','u','t'): case MKTAG(0xa9,'A','R','T'): key = "artist"; break; case MKTAG(0xa9,'w','r','t'): key = "composer"; break; case MKTAG( 'c','p','r','t'): case MKTAG(0xa9,'c','p','y'): key = "copyright"; break; case MKTAG(0xa9,'c','m','t'): case MKTAG(0xa9,'i','n','f'): key = "comment"; break; case MKTAG(0xa9,'a','l','b'): key = "album"; break; case MKTAG(0xa9,'d','a','y'): key = "date"; break; case MKTAG(0xa9,'g','e','n'): key = "genre"; break; case MKTAG(0xa9,'t','o','o'): case MKTAG(0xa9,'s','w','r'): key = "encoder"; break; case MKTAG(0xa9,'e','n','c'): key = "encoder"; break; case MKTAG( 'd','e','s','c'): key = "description";break; case MKTAG( 'l','d','e','s'): key = "synopsis"; break; case MKTAG( 't','v','s','h'): key = "show"; break; case MKTAG( 't','v','e','n'): key = "episode_id";break; case MKTAG( 't','v','n','n'): key = "network"; break; case MKTAG( 't','r','k','n'): key = "track"; parse = mov_metadata_trkn; break; } if (c->itunes_metadata && atom.size > 8) { int data_size = get_be32(pb); int tag = get_le32(pb); if (tag == MKTAG('d','a','t','a')) { data_type = get_be32(pb); // type get_be32(pb); // unknown str_size = data_size - 16; atom.size -= 16; } else return 0; } else if (atom.size > 4 && key && !c->itunes_metadata) { str_size = get_be16(pb); // string length langcode = get_be16(pb); ff_mov_lang_to_iso639(langcode, language); atom.size -= 4; } else str_size = atom.size; #ifdef MOV_EXPORT_ALL_METADATA if (!key) { snprintf(tmp_key, 5, "%.4s", (char*)&atom.type); key = tmp_key; } #endif if (!key) return 0; if (atom.size < 0) return -1; str_size = FFMIN3(sizeof(str)-1, str_size, atom.size); if (parse) parse(c, pb, str_size); else { if (data_type == 3 || (data_type == 0 && langcode < 0x800)) { // MAC Encoded mov_read_mac_string(c, pb, str_size, str, sizeof(str)); } else { get_buffer(pb, str, str_size); str[str_size] = 0; } av_metadata_set2(&c->fc->metadata, key, str, 0); if (*language && strcmp(language, "und")) { snprintf(key2, sizeof(key2), "%s-%s", key, language); av_metadata_set2(&c->fc->metadata, key2, str, 0); } } #ifdef DEBUG_METADATA av_log(c->fc, AV_LOG_DEBUG, "lang \"%3s\" ", language); av_log(c->fc, AV_LOG_DEBUG, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %lld\n", key, str, (char*)&atom.type, str_size, atom.size); #endif return 0; } static int mov_read_chpl(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { int64_t start; int i, nb_chapters, str_len, version; char str[256+1]; if ((atom.size -= 5) < 0) return 0; version = get_byte(pb); get_be24(pb); if (version) get_be32(pb); // ??? nb_chapters = get_byte(pb); for (i = 0; i < nb_chapters; i++) { if (atom.size < 9) return 0; start = get_be64(pb); str_len = get_byte(pb); if ((atom.size -= 9+str_len) < 0) return 0; get_buffer(pb, str, str_len); str[str_len] = 0; ff_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str); } return 0; } static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { int64_t total_size = 0; MOVAtom a; int i; if (atom.size < 0) atom.size = INT64_MAX; while (total_size + 8 < atom.size && !url_feof(pb)) { int (*parse)(MOVContext*, ByteIOContext*, MOVAtom) = NULL; a.size = atom.size; a.type=0; if(atom.size >= 8) { a.size = get_be32(pb); a.type = get_le32(pb); } av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n", a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size); total_size += 8; if (a.size == 1) { /* 64 bit extended size */ a.size = get_be64(pb) - 8; total_size += 8; } if (a.size == 0) { a.size = atom.size - total_size; if (a.size <= 8) break; } a.size -= 8; if(a.size < 0) break; a.size = FFMIN(a.size, atom.size - total_size); for (i = 0; mov_default_parse_table[i].type; i++) if (mov_default_parse_table[i].type == a.type) { parse = mov_default_parse_table[i].parse; break; } // container is user data if (!parse && (atom.type == MKTAG('u','d','t','a') || atom.type == MKTAG('i','l','s','t'))) parse = mov_read_udta_string; if (!parse) { /* skip leaf atoms data */ url_fskip(pb, a.size); } else { int64_t start_pos = url_ftell(pb); int64_t left; int err = parse(c, pb, a); if (err < 0) return err; if (c->found_moov && c->found_mdat && (url_is_streamed(pb) || start_pos + a.size == url_fsize(pb))) return 0; left = a.size - url_ftell(pb) + start_pos; if (left > 0) /* skip garbage at atom end */ url_fskip(pb, left); } total_size += a.size; } if (total_size < atom.size && atom.size < 0x7ffff) url_fskip(pb, atom.size - total_size); return 0; } static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; MOVStreamContext *sc; int entries, i, j; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; sc = st->priv_data; get_be32(pb); // version + flags entries = get_be32(pb); if (entries >= UINT_MAX / sizeof(*sc->drefs)) return -1; sc->drefs = av_mallocz(entries * sizeof(*sc->drefs)); if (!sc->drefs) return AVERROR(ENOMEM); sc->drefs_count = entries; for (i = 0; i < sc->drefs_count; i++) { MOVDref *dref = &sc->drefs[i]; uint32_t size = get_be32(pb); int64_t next = url_ftell(pb) + size - 4; if (size < 12) return -1; dref->type = get_le32(pb); get_be32(pb); // version + flags av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size); if (dref->type == MKTAG('a','l','i','s') && size > 150) { /* macintosh alias record */ uint16_t volume_len, len; int16_t type; url_fskip(pb, 10); volume_len = get_byte(pb); volume_len = FFMIN(volume_len, 27); get_buffer(pb, dref->volume, 27); dref->volume[volume_len] = 0; av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len); url_fskip(pb, 12); len = get_byte(pb); len = FFMIN(len, 63); get_buffer(pb, dref->filename, 63); dref->filename[len] = 0; av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len); url_fskip(pb, 16); /* read next level up_from_alias/down_to_target */ dref->nlvl_from = get_be16(pb); dref->nlvl_to = get_be16(pb); av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n", dref->nlvl_from, dref->nlvl_to); url_fskip(pb, 16); for (type = 0; type != -1 && url_ftell(pb) < next; ) { type = get_be16(pb); len = get_be16(pb); av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len); if (len&1) len += 1; if (type == 2) { // absolute path av_free(dref->path); dref->path = av_mallocz(len+1); if (!dref->path) return AVERROR(ENOMEM); get_buffer(pb, dref->path, len); if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) { len -= volume_len; memmove(dref->path, dref->path+volume_len, len); dref->path[len] = 0; } for (j = 0; j < len; j++) if (dref->path[j] == ':') dref->path[j] = '/'; av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path); } else if (type == 0) { // directory name av_free(dref->dir); dref->dir = av_malloc(len+1); if (!dref->dir) return AVERROR(ENOMEM); get_buffer(pb, dref->dir, len); dref->dir[len] = 0; for (j = 0; j < len; j++) if (dref->dir[j] == ':') dref->dir[j] = '/'; av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir); } else url_fskip(pb, len); } } url_fseek(pb, next, SEEK_SET); } return 0; } static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; uint32_t type; uint32_t ctype; if (c->fc->nb_streams < 1) // meta before first trak return 0; st = c->fc->streams[c->fc->nb_streams-1]; get_byte(pb); /* version */ get_be24(pb); /* flags */ /* component type */ ctype = get_le32(pb); type = get_le32(pb); /* component subtype */ av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype); av_dlog(c->fc, "stype= %.4s\n", (char*)&type); if (type == MKTAG('v','i','d','e')) st->codec->codec_type = AVMEDIA_TYPE_VIDEO; else if(type == MKTAG('s','o','u','n')) st->codec->codec_type = AVMEDIA_TYPE_AUDIO; else if(type == MKTAG('m','1','a',' ')) st->codec->codec_id = CODEC_ID_MP2; else if(type == MKTAG('s','u','b','p')) st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; get_be32(pb); /* component manufacture */ get_be32(pb); /* component flags */ get_be32(pb); /* component flags mask */ return 0; } int ff_mov_read_esds(AVFormatContext *fc, ByteIOContext *pb, MOVAtom atom) { AVStream *st; int tag, len; if (fc->nb_streams < 1) return 0; st = fc->streams[fc->nb_streams-1]; get_be32(pb); /* version + flags */ len = ff_mp4_read_descr(fc, pb, &tag); if (tag == MP4ESDescrTag) { get_be16(pb); /* ID */ get_byte(pb); /* priority */ } else get_be16(pb); /* ID */ len = ff_mp4_read_descr(fc, pb, &tag); if (tag == MP4DecConfigDescrTag) ff_mp4_read_dec_config_descr(fc, st, pb); return 0; } static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { return ff_mov_read_esds(c->fc, pb, atom); } static int mov_read_dac3(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; int ac3info, acmod, lfeon; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; ac3info = get_be24(pb); acmod = (ac3info >> 11) & 0x7; lfeon = (ac3info >> 10) & 0x1; st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon; return 0; } static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { const int num = get_be32(pb); const int den = get_be32(pb); AVStream *st; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) { av_log(c->fc, AV_LOG_WARNING, "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n", st->sample_aspect_ratio.num, st->sample_aspect_ratio.den, num, den); } else if (den != 0) { st->sample_aspect_ratio.num = num; st->sample_aspect_ratio.den = den; } return 0; } /* this atom contains actual media data */ static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { if(atom.size == 0) /* wrong one (MP4) */ return 0; c->found_mdat=1; return 0; /* now go for moov */ } /* read major brand, minor version and compatible brands and store them as metadata */ static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { uint32_t minor_ver; int comp_brand_size; char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */ char* comp_brands_str; uint8_t type[5] = {0}; get_buffer(pb, type, 4); if (strcmp(type, "qt ")) c->isom = 1; av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type); av_metadata_set2(&c->fc->metadata, "major_brand", type, 0); minor_ver = get_be32(pb); /* minor version */ snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver); av_metadata_set2(&c->fc->metadata, "minor_version", minor_ver_str, 0); comp_brand_size = atom.size - 8; if (comp_brand_size < 0) return -1; comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */ if (!comp_brands_str) return AVERROR(ENOMEM); get_buffer(pb, comp_brands_str, comp_brand_size); comp_brands_str[comp_brand_size] = 0; av_metadata_set2(&c->fc->metadata, "compatible_brands", comp_brands_str, 0); av_freep(&comp_brands_str); return 0; } /* this atom should contain all header atoms */ static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { if (mov_read_default(c, pb, atom) < 0) return -1; /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */ /* so we don't parse the whole file if over a network */ c->found_moov=1; return 0; /* now go for mdat */ } static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { c->fragment.moof_offset = url_ftell(pb) - 8; av_dlog(c->fc, "moof offset %llx\n", c->fragment.moof_offset); return mov_read_default(c, pb, atom); } static void mov_metadata_creation_time(AVMetadata **metadata, time_t time) { char buffer[32]; if (time) { struct tm *ptm; time -= 2082844800; /* seconds between 1904-01-01 and Epoch */ ptm = gmtime(&time); if (!ptm) return; strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm); av_metadata_set2(metadata, "creation_time", buffer, 0); } } static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; MOVStreamContext *sc; int version; char language[4] = {0}; unsigned lang; time_t creation_time; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; sc = st->priv_data; version = get_byte(pb); if (version > 1) return -1; /* unsupported */ get_be24(pb); /* flags */ if (version == 1) { creation_time = get_be64(pb); get_be64(pb); } else { creation_time = get_be32(pb); get_be32(pb); /* modification time */ } mov_metadata_creation_time(&st->metadata, creation_time); sc->time_scale = get_be32(pb); st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */ lang = get_be16(pb); /* language */ if (ff_mov_lang_to_iso639(lang, language)) av_metadata_set2(&st->metadata, "language", language, 0); get_be16(pb); /* quality */ return 0; } static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { time_t creation_time; int version = get_byte(pb); /* version */ get_be24(pb); /* flags */ if (version == 1) { creation_time = get_be64(pb); get_be64(pb); } else { creation_time = get_be32(pb); get_be32(pb); /* modification time */ } mov_metadata_creation_time(&c->fc->metadata, creation_time); c->time_scale = get_be32(pb); /* time scale */ av_dlog(c->fc, "time scale = %i\n", c->time_scale); c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */ get_be32(pb); /* preferred scale */ get_be16(pb); /* preferred volume */ url_fskip(pb, 10); /* reserved */ url_fskip(pb, 36); /* display matrix */ get_be32(pb); /* preview time */ get_be32(pb); /* preview duration */ get_be32(pb); /* poster time */ get_be32(pb); /* selection time */ get_be32(pb); /* selection duration */ get_be32(pb); /* current time */ get_be32(pb); /* next track ID */ return 0; } static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; if((uint64_t)atom.size > (1<<30)) return -1; // currently SVQ3 decoder expect full STSD header - so let's fake it // this should be fixed and just SMI header should be passed av_free(st->codec->extradata); st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE); if (!st->codec->extradata) return AVERROR(ENOMEM); st->codec->extradata_size = 0x5a + atom.size; memcpy(st->codec->extradata, "SVQ3", 4); // fake get_buffer(pb, st->codec->extradata + 0x5a, atom.size); av_dlog(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a); return 0; } static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; int little_endian; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; little_endian = get_be16(pb); av_dlog(c->fc, "enda %d\n", little_endian); if (little_endian == 1) { switch (st->codec->codec_id) { case CODEC_ID_PCM_S24BE: st->codec->codec_id = CODEC_ID_PCM_S24LE; break; case CODEC_ID_PCM_S32BE: st->codec->codec_id = CODEC_ID_PCM_S32LE; break; case CODEC_ID_PCM_F32BE: st->codec->codec_id = CODEC_ID_PCM_F32LE; break; case CODEC_ID_PCM_F64BE: st->codec->codec_id = CODEC_ID_PCM_F64LE; break; default: break; } } return 0; } /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */ static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; uint64_t size; uint8_t *buf; if (c->fc->nb_streams < 1) // will happen with jp2 files return 0; st= c->fc->streams[c->fc->nb_streams-1]; size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE; if(size > INT_MAX || (uint64_t)atom.size > INT_MAX) return -1; buf= av_realloc(st->codec->extradata, size); if(!buf) return -1; st->codec->extradata= buf; buf+= st->codec->extradata_size; st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE; AV_WB32( buf , atom.size + 8); AV_WL32( buf + 4, atom.type); get_buffer(pb, buf + 8, atom.size); return 0; } static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; if((uint64_t)atom.size > (1<<30)) return -1; if (st->codec->codec_id == CODEC_ID_QDM2) { // pass all frma atom to codec, needed at least for QDM2 av_free(st->codec->extradata); st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE); if (!st->codec->extradata) return AVERROR(ENOMEM); st->codec->extradata_size = atom.size; get_buffer(pb, st->codec->extradata, atom.size); } else if (atom.size > 8) { /* to read frma, esds atoms */ if (mov_read_default(c, pb, atom) < 0) return -1; } else url_fskip(pb, atom.size); return 0; } /** * This function reads atom content and puts data in extradata without tag * nor size unlike mov_read_extradata. */ static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; if((uint64_t)atom.size > (1<<30)) return -1; av_free(st->codec->extradata); st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE); if (!st->codec->extradata) return AVERROR(ENOMEM); st->codec->extradata_size = atom.size; get_buffer(pb, st->codec->extradata, atom.size); return 0; } /** * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself, * but can have extradata appended at the end after the 40 bytes belonging * to the struct. */ static int mov_read_strf(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; if (c->fc->nb_streams < 1) return 0; if (atom.size <= 40) return 0; st = c->fc->streams[c->fc->nb_streams-1]; if((uint64_t)atom.size > (1<<30)) return -1; av_free(st->codec->extradata); st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE); if (!st->codec->extradata) return AVERROR(ENOMEM); st->codec->extradata_size = atom.size - 40; url_fskip(pb, 40); get_buffer(pb, st->codec->extradata, atom.size - 40); return 0; } static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; MOVStreamContext *sc; unsigned int i, entries; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; sc = st->priv_data; get_byte(pb); /* version */ get_be24(pb); /* flags */ entries = get_be32(pb); if(entries >= UINT_MAX/sizeof(int64_t)) return -1; sc->chunk_offsets = av_malloc(entries * sizeof(int64_t)); if (!sc->chunk_offsets) return AVERROR(ENOMEM); sc->chunk_count = entries; if (atom.type == MKTAG('s','t','c','o')) for(i=0; i<entries; i++) sc->chunk_offsets[i] = get_be32(pb); else if (atom.type == MKTAG('c','o','6','4')) for(i=0; i<entries; i++) sc->chunk_offsets[i] = get_be64(pb); else return -1; return 0; } /** * Compute codec id for 'lpcm' tag. * See CoreAudioTypes and AudioStreamBasicDescription at Apple. */ enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags) { if (flags & 1) { // floating point if (flags & 2) { // big endian if (bps == 32) return CODEC_ID_PCM_F32BE; else if (bps == 64) return CODEC_ID_PCM_F64BE; } else { if (bps == 32) return CODEC_ID_PCM_F32LE; else if (bps == 64) return CODEC_ID_PCM_F64LE; } } else { if (flags & 2) { if (bps == 8) // signed integer if (flags & 4) return CODEC_ID_PCM_S8; else return CODEC_ID_PCM_U8; else if (bps == 16) return CODEC_ID_PCM_S16BE; else if (bps == 24) return CODEC_ID_PCM_S24BE; else if (bps == 32) return CODEC_ID_PCM_S32BE; } else { if (bps == 8) if (flags & 4) return CODEC_ID_PCM_S8; else return CODEC_ID_PCM_U8; else if (bps == 16) return CODEC_ID_PCM_S16LE; else if (bps == 24) return CODEC_ID_PCM_S24LE; else if (bps == 32) return CODEC_ID_PCM_S32LE; } } return CODEC_ID_NONE; } int ff_mov_read_stsd_entries(MOVContext *c, ByteIOContext *pb, int entries) { AVStream *st; MOVStreamContext *sc; int j, pseudo_stream_id; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; sc = st->priv_data; for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) { //Parsing Sample description table enum CodecID id; int dref_id = 1; MOVAtom a = { AV_RL32("stsd") }; int64_t start_pos = url_ftell(pb); int size = get_be32(pb); /* size */ uint32_t format = get_le32(pb); /* data format */ if (size >= 16) { get_be32(pb); /* reserved */ get_be16(pb); /* reserved */ dref_id = get_be16(pb); } if (st->codec->codec_tag && st->codec->codec_tag != format && (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id : st->codec->codec_tag != MKTAG('j','p','e','g')) ){ /* Multiple fourcc, we skip JPEG. This is not correct, we should * export it as a separate AVStream but this needs a few changes * in the MOV demuxer, patch welcome. */ multiple_stsd: av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n"); url_fskip(pb, size - (url_ftell(pb) - start_pos)); continue; } /* we cannot demux concatenated h264 streams because of different extradata */ if (st->codec->codec_tag && st->codec->codec_tag == AV_RL32("avc1")) goto multiple_stsd; sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id; sc->dref_id= dref_id; st->codec->codec_tag = format; id = ff_codec_get_id(codec_movaudio_tags, format); if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8))) id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format)&0xFFFF); if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) { st->codec->codec_type = AVMEDIA_TYPE_AUDIO; } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */ format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */ id = ff_codec_get_id(codec_movvideo_tags, format); if (id <= 0) id = ff_codec_get_id(ff_codec_bmp_tags, format); if (id > 0) st->codec->codec_type = AVMEDIA_TYPE_VIDEO; else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){ id = ff_codec_get_id(ff_codec_movsubtitle_tags, format); if(id > 0) st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; } } av_dlog(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size, (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff, (format >> 24) & 0xff, st->codec->codec_type); if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) { unsigned int color_depth, len; int color_greyscale; st->codec->codec_id = id; get_be16(pb); /* version */ get_be16(pb); /* revision level */ get_be32(pb); /* vendor */ get_be32(pb); /* temporal quality */ get_be32(pb); /* spatial quality */ st->codec->width = get_be16(pb); /* width */ st->codec->height = get_be16(pb); /* height */ get_be32(pb); /* horiz resolution */ get_be32(pb); /* vert resolution */ get_be32(pb); /* data size, always 0 */ get_be16(pb); /* frames per samples */ len = get_byte(pb); /* codec name, pascal string */ if (len > 31) len = 31; mov_read_mac_string(c, pb, len, st->codec->codec_name, 32); if (len < 31) url_fskip(pb, 31 - len); /* codec_tag YV12 triggers an UV swap in rawdec.c */ if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) st->codec->codec_tag=MKTAG('I', '4', '2', '0'); st->codec->bits_per_coded_sample = get_be16(pb); /* depth */ st->codec->color_table_id = get_be16(pb); /* colortable id */ av_dlog(c->fc, "depth %d, ctab id %d\n", st->codec->bits_per_coded_sample, st->codec->color_table_id); /* figure out the palette situation */ color_depth = st->codec->bits_per_coded_sample & 0x1F; color_greyscale = st->codec->bits_per_coded_sample & 0x20; /* if the depth is 2, 4, or 8 bpp, file is palettized */ if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) { /* for palette traversal */ unsigned int color_start, color_count, color_end; unsigned char r, g, b; st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl)); if (color_greyscale) { int color_index, color_dec; /* compute the greyscale palette */ st->codec->bits_per_coded_sample = color_depth; color_count = 1 << color_depth; color_index = 255; color_dec = 256 / (color_count - 1); for (j = 0; j < color_count; j++) { r = g = b = color_index; st->codec->palctrl->palette[j] = (r << 16) | (g << 8) | (b); color_index -= color_dec; if (color_index < 0) color_index = 0; } } else if (st->codec->color_table_id) { const uint8_t *color_table; /* if flag bit 3 is set, use the default palette */ color_count = 1 << color_depth; if (color_depth == 2) color_table = ff_qt_default_palette_4; else if (color_depth == 4) color_table = ff_qt_default_palette_16; else color_table = ff_qt_default_palette_256; for (j = 0; j < color_count; j++) { r = color_table[j * 3 + 0]; g = color_table[j * 3 + 1]; b = color_table[j * 3 + 2]; st->codec->palctrl->palette[j] = (r << 16) | (g << 8) | (b); } } else { /* load the palette from the file */ color_start = get_be32(pb); color_count = get_be16(pb); color_end = get_be16(pb); if ((color_start <= 255) && (color_end <= 255)) { for (j = color_start; j <= color_end; j++) { /* each R, G, or B component is 16 bits; * only use the top 8 bits; skip alpha bytes * up front */ get_byte(pb); get_byte(pb); r = get_byte(pb); get_byte(pb); g = get_byte(pb); get_byte(pb); b = get_byte(pb); get_byte(pb); st->codec->palctrl->palette[j] = (r << 16) | (g << 8) | (b); } } } st->codec->palctrl->palette_changed = 1; } } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) { int bits_per_sample, flags; uint16_t version = get_be16(pb); st->codec->codec_id = id; get_be16(pb); /* revision level */ get_be32(pb); /* vendor */ st->codec->channels = get_be16(pb); /* channel count */ av_dlog(c->fc, "audio channels %d\n", st->codec->channels); st->codec->bits_per_coded_sample = get_be16(pb); /* sample size */ sc->audio_cid = get_be16(pb); get_be16(pb); /* packet size = 0 */ st->codec->sample_rate = ((get_be32(pb) >> 16)); //Read QT version 1 fields. In version 0 these do not exist. av_dlog(c->fc, "version =%d, isom =%d\n",version,c->isom); if(!c->isom) { if(version==1) { sc->samples_per_frame = get_be32(pb); get_be32(pb); /* bytes per packet */ sc->bytes_per_frame = get_be32(pb); get_be32(pb); /* bytes per sample */ } else if(version==2) { get_be32(pb); /* sizeof struct only */ st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */ st->codec->channels = get_be32(pb); get_be32(pb); /* always 0x7F000000 */ st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */ flags = get_be32(pb); /* lpcm format specific flag */ sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */ sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */ if (format == MKTAG('l','p','c','m')) st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags); } } switch (st->codec->codec_id) { case CODEC_ID_PCM_S8: case CODEC_ID_PCM_U8: if (st->codec->bits_per_coded_sample == 16) st->codec->codec_id = CODEC_ID_PCM_S16BE; break; case CODEC_ID_PCM_S16LE: case CODEC_ID_PCM_S16BE: if (st->codec->bits_per_coded_sample == 8) st->codec->codec_id = CODEC_ID_PCM_S8; else if (st->codec->bits_per_coded_sample == 24) st->codec->codec_id = st->codec->codec_id == CODEC_ID_PCM_S16BE ? CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE; break; /* set values for old format before stsd version 1 appeared */ case CODEC_ID_MACE3: sc->samples_per_frame = 6; sc->bytes_per_frame = 2*st->codec->channels; break; case CODEC_ID_MACE6: sc->samples_per_frame = 6; sc->bytes_per_frame = 1*st->codec->channels; break; case CODEC_ID_ADPCM_IMA_QT: sc->samples_per_frame = 64; sc->bytes_per_frame = 34*st->codec->channels; break; case CODEC_ID_GSM: sc->samples_per_frame = 160; sc->bytes_per_frame = 33; break; default: break; } bits_per_sample = av_get_bits_per_sample(st->codec->codec_id); if (bits_per_sample) { st->codec->bits_per_coded_sample = bits_per_sample; sc->sample_size = (bits_per_sample >> 3) * st->codec->channels; } } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){ // ttxt stsd contains display flags, justification, background // color, fonts, and default styles, so fake an atom to read it MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) }; if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom mov_read_glbl(c, pb, fake_atom); st->codec->codec_id= id; st->codec->width = sc->width; st->codec->height = sc->height; } else { /* other codec type, just skip (rtp, mp4s, tmcd ...) */ url_fskip(pb, size - (url_ftell(pb) - start_pos)); } /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */ a.size = size - (url_ftell(pb) - start_pos); if (a.size > 8) { if (mov_read_default(c, pb, a) < 0) return -1; } else if (a.size > 0) url_fskip(pb, a.size); } if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1) st->codec->sample_rate= sc->time_scale; /* special codec parameters handling */ switch (st->codec->codec_id) { #if CONFIG_DV_DEMUXER case CODEC_ID_DVAUDIO: c->dv_fctx = avformat_alloc_context(); c->dv_demux = dv_init_demux(c->dv_fctx); if (!c->dv_demux) { av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n"); return -1; } sc->dv_audio_container = 1; st->codec->codec_id = CODEC_ID_PCM_S16LE; break; #endif /* no ifdef since parameters are always those */ case CODEC_ID_QCELP: // force sample rate for qcelp when not stored in mov if (st->codec->codec_tag != MKTAG('Q','c','l','p')) st->codec->sample_rate = 8000; st->codec->frame_size= 160; st->codec->channels= 1; /* really needed */ break; case CODEC_ID_AMR_NB: case CODEC_ID_AMR_WB: st->codec->frame_size= sc->samples_per_frame; st->codec->channels= 1; /* really needed */ /* force sample rate for amr, stsd in 3gp does not store sample rate */ if (st->codec->codec_id == CODEC_ID_AMR_NB) st->codec->sample_rate = 8000; else if (st->codec->codec_id == CODEC_ID_AMR_WB) st->codec->sample_rate = 16000; break; case CODEC_ID_MP2: case CODEC_ID_MP3: st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */ st->need_parsing = AVSTREAM_PARSE_FULL; break; case CODEC_ID_GSM: case CODEC_ID_ADPCM_MS: case CODEC_ID_ADPCM_IMA_WAV: st->codec->frame_size = sc->samples_per_frame; st->codec->block_align = sc->bytes_per_frame; break; case CODEC_ID_ALAC: if (st->codec->extradata_size == 36) { st->codec->frame_size = AV_RB32(st->codec->extradata+12); st->codec->channels = AV_RB8 (st->codec->extradata+21); st->codec->sample_rate = AV_RB32(st->codec->extradata+32); } break; default: break; } return 0; } static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { int entries; get_byte(pb); /* version */ get_be24(pb); /* flags */ entries = get_be32(pb); return ff_mov_read_stsd_entries(c, pb, entries); } static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; MOVStreamContext *sc; unsigned int i, entries; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; sc = st->priv_data; get_byte(pb); /* version */ get_be24(pb); /* flags */ entries = get_be32(pb); av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries); if(entries >= UINT_MAX / sizeof(*sc->stsc_data)) return -1; sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data)); if (!sc->stsc_data) return AVERROR(ENOMEM); sc->stsc_count = entries; for(i=0; i<entries; i++) { sc->stsc_data[i].first = get_be32(pb); sc->stsc_data[i].count = get_be32(pb); sc->stsc_data[i].id = get_be32(pb); } return 0; } static int mov_read_stps(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; MOVStreamContext *sc; unsigned i, entries; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; sc = st->priv_data; get_be32(pb); // version + flags entries = get_be32(pb); if (entries >= UINT_MAX / sizeof(*sc->stps_data)) return -1; sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data)); if (!sc->stps_data) return AVERROR(ENOMEM); sc->stps_count = entries; for (i = 0; i < entries; i++) { sc->stps_data[i] = get_be32(pb); //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]); } return 0; } static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; MOVStreamContext *sc; unsigned int i, entries; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; sc = st->priv_data; get_byte(pb); /* version */ get_be24(pb); /* flags */ entries = get_be32(pb); av_dlog(c->fc, "keyframe_count = %d\n", entries); if(entries >= UINT_MAX / sizeof(int)) return -1; sc->keyframes = av_malloc(entries * sizeof(int)); if (!sc->keyframes) return AVERROR(ENOMEM); sc->keyframe_count = entries; for(i=0; i<entries; i++) { sc->keyframes[i] = get_be32(pb); //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]); } return 0; } static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; MOVStreamContext *sc; unsigned int i, entries, sample_size, field_size, num_bytes; GetBitContext gb; unsigned char* buf; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; sc = st->priv_data; get_byte(pb); /* version */ get_be24(pb); /* flags */ if (atom.type == MKTAG('s','t','s','z')) { sample_size = get_be32(pb); if (!sc->sample_size) /* do not overwrite value computed in stsd */ sc->sample_size = sample_size; field_size = 32; } else { sample_size = 0; get_be24(pb); /* reserved */ field_size = get_byte(pb); } entries = get_be32(pb); av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries); sc->sample_count = entries; if (sample_size) return 0; if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) { av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size); return -1; } if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size) return -1; sc->sample_sizes = av_malloc(entries * sizeof(int)); if (!sc->sample_sizes) return AVERROR(ENOMEM); num_bytes = (entries*field_size+4)>>3; buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE); if (!buf) { av_freep(&sc->sample_sizes); return AVERROR(ENOMEM); } if (get_buffer(pb, buf, num_bytes) < num_bytes) { av_freep(&sc->sample_sizes); av_free(buf); return -1; } init_get_bits(&gb, buf, 8*num_bytes); for(i=0; i<entries; i++) sc->sample_sizes[i] = get_bits_long(&gb, field_size); av_free(buf); return 0; } static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; MOVStreamContext *sc; unsigned int i, entries; int64_t duration=0; int64_t total_sample_count=0; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; sc = st->priv_data; get_byte(pb); /* version */ get_be24(pb); /* flags */ entries = get_be32(pb); av_dlog(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries); if(entries >= UINT_MAX / sizeof(*sc->stts_data)) return -1; sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data)); if (!sc->stts_data) return AVERROR(ENOMEM); sc->stts_count = entries; for(i=0; i<entries; i++) { int sample_duration; int sample_count; sample_count=get_be32(pb); sample_duration = get_be32(pb); sc->stts_data[i].count= sample_count; sc->stts_data[i].duration= sample_duration; av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration); duration+=(int64_t)sample_duration*sample_count; total_sample_count+=sample_count; } st->nb_frames= total_sample_count; if(duration) st->duration= duration; return 0; } static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; MOVStreamContext *sc; unsigned int i, entries; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; sc = st->priv_data; get_byte(pb); /* version */ get_be24(pb); /* flags */ entries = get_be32(pb); av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries); if(entries >= UINT_MAX / sizeof(*sc->ctts_data)) return -1; sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data)); if (!sc->ctts_data) return AVERROR(ENOMEM); sc->ctts_count = entries; for(i=0; i<entries; i++) { int count =get_be32(pb); int duration =get_be32(pb); sc->ctts_data[i].count = count; sc->ctts_data[i].duration= duration; if (duration < 0) sc->dts_shift = FFMAX(sc->dts_shift, -duration); } av_dlog(c->fc, "dts shift %d\n", sc->dts_shift); return 0; } static void mov_build_index(MOVContext *mov, AVStream *st) { MOVStreamContext *sc = st->priv_data; int64_t current_offset; int64_t current_dts = 0; unsigned int stts_index = 0; unsigned int stsc_index = 0; unsigned int stss_index = 0; unsigned int stps_index = 0; unsigned int i, j; uint64_t stream_size = 0; /* adjust first dts according to edit list */ if (sc->time_offset && mov->time_scale > 0) { int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset; current_dts = -rescaled; if (sc->ctts_data && sc->stts_data && sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) { /* more than 16 frames delay, dts are likely wrong this happens with files created by iMovie */ sc->wrong_dts = 1; st->codec->has_b_frames = 1; } } /* only use old uncompressed audio chunk demuxing when stts specifies it */ if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && sc->stts_count == 1 && sc->stts_data[0].duration == 1)) { unsigned int current_sample = 0; unsigned int stts_sample = 0; unsigned int sample_size; unsigned int distance = 0; int key_off = sc->keyframes && sc->keyframes[0] == 1; current_dts -= sc->dts_shift; if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries)) return; st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries)); if (!st->index_entries) return; st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries); for (i = 0; i < sc->chunk_count; i++) { current_offset = sc->chunk_offsets[i]; if (stsc_index + 1 < sc->stsc_count && i + 1 == sc->stsc_data[stsc_index + 1].first) stsc_index++; for (j = 0; j < sc->stsc_data[stsc_index].count; j++) { int keyframe = 0; if (current_sample >= sc->sample_count) { av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n"); return; } if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) { keyframe = 1; if (stss_index + 1 < sc->keyframe_count) stss_index++; } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) { keyframe = 1; if (stps_index + 1 < sc->stps_count) stps_index++; } if (keyframe) distance = 0; sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample]; if(sc->pseudo_stream_id == -1 || sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) { AVIndexEntry *e = &st->index_entries[st->nb_index_entries++]; e->pos = current_offset; e->timestamp = current_dts; e->size = sample_size; e->min_distance = distance; e->flags = keyframe ? AVINDEX_KEYFRAME : 0; av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", " "size %d, distance %d, keyframe %d\n", st->index, current_sample, current_offset, current_dts, sample_size, distance, keyframe); } current_offset += sample_size; stream_size += sample_size; current_dts += sc->stts_data[stts_index].duration; distance++; stts_sample++; current_sample++; if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) { stts_sample = 0; stts_index++; } } } if (st->duration > 0) st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration; } else { unsigned chunk_samples, total = 0; // compute total chunk count for (i = 0; i < sc->stsc_count; i++) { unsigned count, chunk_count; chunk_samples = sc->stsc_data[i].count; if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) { av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n"); return; } if (sc->samples_per_frame >= 160) { // gsm count = chunk_samples / sc->samples_per_frame; } else if (sc->samples_per_frame > 1) { unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame; count = (chunk_samples+samples-1) / samples; } else { count = (chunk_samples+1023) / 1024; } if (i < sc->stsc_count - 1) chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first; else chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1); total += chunk_count * count; } av_dlog(mov->fc, "chunk count %d\n", total); if (total >= UINT_MAX / sizeof(*st->index_entries)) return; st->index_entries = av_malloc(total*sizeof(*st->index_entries)); if (!st->index_entries) return; st->index_entries_allocated_size = total*sizeof(*st->index_entries); // populate index for (i = 0; i < sc->chunk_count; i++) { current_offset = sc->chunk_offsets[i]; if (stsc_index + 1 < sc->stsc_count && i + 1 == sc->stsc_data[stsc_index + 1].first) stsc_index++; chunk_samples = sc->stsc_data[stsc_index].count; while (chunk_samples > 0) { AVIndexEntry *e; unsigned size, samples; if (sc->samples_per_frame >= 160) { // gsm samples = sc->samples_per_frame; size = sc->bytes_per_frame; } else { if (sc->samples_per_frame > 1) { samples = FFMIN((1024 / sc->samples_per_frame)* sc->samples_per_frame, chunk_samples); size = (samples / sc->samples_per_frame) * sc->bytes_per_frame; } else { samples = FFMIN(1024, chunk_samples); size = samples * sc->sample_size; } } if (st->nb_index_entries >= total) { av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total); return; } e = &st->index_entries[st->nb_index_entries++]; e->pos = current_offset; e->timestamp = current_dts; e->size = size; e->min_distance = 0; e->flags = AVINDEX_KEYFRAME; av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", " "size %d, duration %d\n", st->index, i, current_offset, current_dts, size, samples); current_offset += size; current_dts += samples; chunk_samples -= samples; } } } } static int mov_open_dref(ByteIOContext **pb, char *src, MOVDref *ref) { /* try relative path, we do not try the absolute because it can leak information about our system to an attacker */ if (ref->nlvl_to > 0 && ref->nlvl_from > 0) { char filename[1024]; char *src_path; int i, l; /* find a source dir */ src_path = strrchr(src, '/'); if (src_path) src_path++; else src_path = src; /* find a next level down to target */ for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--) if (ref->path[l] == '/') { if (i == ref->nlvl_to - 1) break; else i++; } /* compose filename if next level down to target was found */ if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) { memcpy(filename, src, src_path - src); filename[src_path - src] = 0; for (i = 1; i < ref->nlvl_from; i++) av_strlcat(filename, "../", 1024); av_strlcat(filename, ref->path + l + 1, 1024); if (!url_fopen(pb, filename, URL_RDONLY)) return 0; } } return AVERROR(ENOENT); }; static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { AVStream *st; MOVStreamContext *sc; int ret; st = av_new_stream(c->fc, c->fc->nb_streams); if (!st) return AVERROR(ENOMEM); sc = av_mallocz(sizeof(MOVStreamContext)); if (!sc) return AVERROR(ENOMEM); st->priv_data = sc; st->codec->codec_type = AVMEDIA_TYPE_DATA; sc->ffindex = st->index; if ((ret = mov_read_default(c, pb, atom)) < 0) return ret; /* sanity checks */ if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count || (!sc->sample_size && !sc->sample_count))) { av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n", st->index); return 0; } if (sc->time_scale <= 0) { av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index); sc->time_scale = c->time_scale; if (sc->time_scale <= 0) sc->time_scale = 1; } av_set_pts_info(st, 64, 1, sc->time_scale); if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && !st->codec->frame_size && sc->stts_count == 1) { st->codec->frame_size = av_rescale(sc->stts_data[0].duration, st->codec->sample_rate, sc->time_scale); av_dlog(c->fc, "frame size %d\n", st->codec->frame_size); } mov_build_index(c, st); if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) { MOVDref *dref = &sc->drefs[sc->dref_id - 1]; if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0) av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening alias: path='%s', dir='%s', " "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n", st->index, dref->path, dref->dir, dref->filename, dref->volume, dref->nlvl_from, dref->nlvl_to); } else sc->pb = c->fc->pb; if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { if (!st->sample_aspect_ratio.num && (st->codec->width != sc->width || st->codec->height != sc->height)) { st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) / ((double)st->codec->width * sc->height), INT_MAX); } av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, sc->time_scale*st->nb_frames, st->duration, INT_MAX); if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1)) av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, sc->time_scale, sc->stts_data[0].duration, INT_MAX); } switch (st->codec->codec_id) { #if CONFIG_H261_DECODER case CODEC_ID_H261: #endif #if CONFIG_H263_DECODER case CODEC_ID_H263: #endif #if CONFIG_H264_DECODER case CODEC_ID_H264: #endif #if CONFIG_MPEG4_DECODER case CODEC_ID_MPEG4: #endif st->codec->width = 0; /* let decoder init width/height */ st->codec->height= 0; break; } /* Do not need those anymore. */ av_freep(&sc->chunk_offsets); av_freep(&sc->stsc_data); av_freep(&sc->sample_sizes); av_freep(&sc->keyframes); av_freep(&sc->stts_data); av_freep(&sc->stps_data); return 0; } static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { int ret; c->itunes_metadata = 1; ret = mov_read_default(c, pb, atom); c->itunes_metadata = 0; return ret; } static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { while (atom.size > 8) { uint32_t tag = get_le32(pb); atom.size -= 4; if (tag == MKTAG('h','d','l','r')) { url_fseek(pb, -8, SEEK_CUR); atom.size += 8; return mov_read_default(c, pb, atom); } } return 0; } static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { int i; int width; int height; int64_t disp_transform[2]; int display_matrix[3][2]; AVStream *st; MOVStreamContext *sc; int version; if (c->fc->nb_streams < 1) return 0; st = c->fc->streams[c->fc->nb_streams-1]; sc = st->priv_data; version = get_byte(pb); get_be24(pb); /* flags */ /* MOV_TRACK_ENABLED 0x0001 MOV_TRACK_IN_MOVIE 0x0002 MOV_TRACK_IN_PREVIEW 0x0004 MOV_TRACK_IN_POSTER 0x0008 */ if (version == 1) { get_be64(pb); get_be64(pb); } else { get_be32(pb); /* creation time */ get_be32(pb); /* modification time */ } st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/ get_be32(pb); /* reserved */ /* highlevel (considering edits) duration in movie timebase */ (version == 1) ? get_be64(pb) : get_be32(pb); get_be32(pb); /* reserved */ get_be32(pb); /* reserved */ get_be16(pb); /* layer */ get_be16(pb); /* alternate group */ get_be16(pb); /* volume */ get_be16(pb); /* reserved */ //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2) // they're kept in fixed point format through all calculations // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio for (i = 0; i < 3; i++) { display_matrix[i][0] = get_be32(pb); // 16.16 fixed point display_matrix[i][1] = get_be32(pb); // 16.16 fixed point get_be32(pb); // 2.30 fixed point (not used) } width = get_be32(pb); // 16.16 fixed point track width height = get_be32(pb); // 16.16 fixed point track height sc->width = width >> 16; sc->height = height >> 16; // transform the display width/height according to the matrix // skip this if the display matrix is the default identity matrix // or if it is rotating the picture, ex iPhone 3GS // to keep the same scale, use [width height 1<<16] if (width && height && ((display_matrix[0][0] != 65536 || display_matrix[1][1] != 65536) && !display_matrix[0][1] && !display_matrix[1][0] && !display_matrix[2][0] && !display_matrix[2][1])) { for (i = 0; i < 2; i++) disp_transform[i] = (int64_t) width * display_matrix[0][i] + (int64_t) height * display_matrix[1][i] + ((int64_t) display_matrix[2][i] << 16); //sample aspect ratio is new width/height divided by old width/height st->sample_aspect_ratio = av_d2q( ((double) disp_transform[0] * height) / ((double) disp_transform[1] * width), INT_MAX); } return 0; } static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { MOVFragment *frag = &c->fragment; MOVTrackExt *trex = NULL; int flags, track_id, i; get_byte(pb); /* version */ flags = get_be24(pb); track_id = get_be32(pb); if (!track_id) return -1; frag->track_id = track_id; for (i = 0; i < c->trex_count; i++) if (c->trex_data[i].track_id == frag->track_id) { trex = &c->trex_data[i]; break; } if (!trex) { av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n"); return -1; } if (flags & 0x01) frag->base_data_offset = get_be64(pb); else frag->base_data_offset = frag->moof_offset; if (flags & 0x02) frag->stsd_id = get_be32(pb); else frag->stsd_id = trex->stsd_id; frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration; frag->size = flags & 0x10 ? get_be32(pb) : trex->size; frag->flags = flags & 0x20 ? get_be32(pb) : trex->flags; av_dlog(c->fc, "frag flags 0x%x\n", frag->flags); return 0; } static int mov_read_chap(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { c->chapter_track = get_be32(pb); return 0; } static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { MOVTrackExt *trex; if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data)) return -1; trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data)); if (!trex) return AVERROR(ENOMEM); c->trex_data = trex; trex = &c->trex_data[c->trex_count++]; get_byte(pb); /* version */ get_be24(pb); /* flags */ trex->track_id = get_be32(pb); trex->stsd_id = get_be32(pb); trex->duration = get_be32(pb); trex->size = get_be32(pb); trex->flags = get_be32(pb); return 0; } static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { MOVFragment *frag = &c->fragment; AVStream *st = NULL; MOVStreamContext *sc; uint64_t offset; int64_t dts; int data_offset = 0; unsigned entries, first_sample_flags = frag->flags; int flags, distance, i; for (i = 0; i < c->fc->nb_streams; i++) { if (c->fc->streams[i]->id == frag->track_id) { st = c->fc->streams[i]; break; } } if (!st) { av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id); return -1; } sc = st->priv_data; if (sc->pseudo_stream_id+1 != frag->stsd_id) return 0; get_byte(pb); /* version */ flags = get_be24(pb); entries = get_be32(pb); av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries); if (flags & 0x001) data_offset = get_be32(pb); if (flags & 0x004) first_sample_flags = get_be32(pb); if (flags & 0x800) { MOVStts *ctts_data; if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data)) return -1; ctts_data = av_realloc(sc->ctts_data, (entries+sc->ctts_count)*sizeof(*sc->ctts_data)); if (!ctts_data) return AVERROR(ENOMEM); sc->ctts_data = ctts_data; } dts = st->duration; offset = frag->base_data_offset + data_offset; distance = 0; av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags); for (i = 0; i < entries; i++) { unsigned sample_size = frag->size; int sample_flags = i ? frag->flags : first_sample_flags; unsigned sample_duration = frag->duration; int keyframe; if (flags & 0x100) sample_duration = get_be32(pb); if (flags & 0x200) sample_size = get_be32(pb); if (flags & 0x400) sample_flags = get_be32(pb); if (flags & 0x800) { sc->ctts_data[sc->ctts_count].count = 1; sc->ctts_data[sc->ctts_count].duration = get_be32(pb); sc->ctts_count++; } if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO || (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000)) distance = 0; av_add_index_entry(st, offset, dts, sample_size, distance, keyframe ? AVINDEX_KEYFRAME : 0); av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", " "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i, offset, dts, sample_size, distance, keyframe); distance++; dts += sample_duration; offset += sample_size; } frag->moof_offset = offset; st->duration = dts; return 0; } /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */ /* like the files created with Adobe Premiere 5.0, for samples see */ /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */ static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { int err; if (atom.size < 8) return 0; /* continue */ if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */ url_fskip(pb, atom.size - 4); return 0; } atom.type = get_le32(pb); atom.size -= 8; if (atom.type != MKTAG('m','d','a','t')) { url_fskip(pb, atom.size); return 0; } err = mov_read_mdat(c, pb, atom); return err; } static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { #if CONFIG_ZLIB ByteIOContext ctx; uint8_t *cmov_data; uint8_t *moov_data; /* uncompressed data */ long cmov_len, moov_len; int ret = -1; get_be32(pb); /* dcom atom */ if (get_le32(pb) != MKTAG('d','c','o','m')) return -1; if (get_le32(pb) != MKTAG('z','l','i','b')) { av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !"); return -1; } get_be32(pb); /* cmvd atom */ if (get_le32(pb) != MKTAG('c','m','v','d')) return -1; moov_len = get_be32(pb); /* uncompressed size */ cmov_len = atom.size - 6 * 4; cmov_data = av_malloc(cmov_len); if (!cmov_data) return AVERROR(ENOMEM); moov_data = av_malloc(moov_len); if (!moov_data) { av_free(cmov_data); return AVERROR(ENOMEM); } get_buffer(pb, cmov_data, cmov_len); if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK) goto free_and_return; if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0) goto free_and_return; atom.type = MKTAG('m','o','o','v'); atom.size = moov_len; #ifdef DEBUG // { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); } #endif ret = mov_read_default(c, &ctx, atom); free_and_return: av_free(moov_data); av_free(cmov_data); return ret; #else av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n"); return -1; #endif } /* edit list atom */ static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom) { MOVStreamContext *sc; int i, edit_count; if (c->fc->nb_streams < 1) return 0; sc = c->fc->streams[c->fc->nb_streams-1]->priv_data; get_byte(pb); /* version */ get_be24(pb); /* flags */ edit_count = get_be32(pb); /* entries */ if((uint64_t)edit_count*12+8 > atom.size) return -1; for(i=0; i<edit_count; i++){ int time; int duration = get_be32(pb); /* Track duration */ time = get_be32(pb); /* Media time */ get_be32(pb); /* Media rate */ if (i == 0 && time >= -1) { sc->time_offset = time != -1 ? time : -duration; } } if(edit_count > 1) av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, " "a/v desync might occur, patch welcome\n"); av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count); return 0; } static const MOVParseTableEntry mov_default_parse_table[] = { { MKTAG('a','v','s','s'), mov_read_extradata }, { MKTAG('c','h','p','l'), mov_read_chpl }, { MKTAG('c','o','6','4'), mov_read_stco }, { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */ { MKTAG('d','i','n','f'), mov_read_default }, { MKTAG('d','r','e','f'), mov_read_dref }, { MKTAG('e','d','t','s'), mov_read_default }, { MKTAG('e','l','s','t'), mov_read_elst }, { MKTAG('e','n','d','a'), mov_read_enda }, { MKTAG('f','i','e','l'), mov_read_extradata }, { MKTAG('f','t','y','p'), mov_read_ftyp }, { MKTAG('g','l','b','l'), mov_read_glbl }, { MKTAG('h','d','l','r'), mov_read_hdlr }, { MKTAG('i','l','s','t'), mov_read_ilst }, { MKTAG('j','p','2','h'), mov_read_extradata }, { MKTAG('m','d','a','t'), mov_read_mdat }, { MKTAG('m','d','h','d'), mov_read_mdhd }, { MKTAG('m','d','i','a'), mov_read_default }, { MKTAG('m','e','t','a'), mov_read_meta }, { MKTAG('m','i','n','f'), mov_read_default }, { MKTAG('m','o','o','f'), mov_read_moof }, { MKTAG('m','o','o','v'), mov_read_moov }, { MKTAG('m','v','e','x'), mov_read_default }, { MKTAG('m','v','h','d'), mov_read_mvhd }, { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */ { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */ { MKTAG('a','v','c','C'), mov_read_glbl }, { MKTAG('p','a','s','p'), mov_read_pasp }, { MKTAG('s','t','b','l'), mov_read_default }, { MKTAG('s','t','c','o'), mov_read_stco }, { MKTAG('s','t','p','s'), mov_read_stps }, { MKTAG('s','t','r','f'), mov_read_strf }, { MKTAG('s','t','s','c'), mov_read_stsc }, { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */ { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */ { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */ { MKTAG('s','t','t','s'), mov_read_stts }, { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */ { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */ { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */ { MKTAG('t','r','a','k'), mov_read_trak }, { MKTAG('t','r','a','f'), mov_read_default }, { MKTAG('t','r','e','f'), mov_read_default }, { MKTAG('c','h','a','p'), mov_read_chap }, { MKTAG('t','r','e','x'), mov_read_trex }, { MKTAG('t','r','u','n'), mov_read_trun }, { MKTAG('u','d','t','a'), mov_read_default }, { MKTAG('w','a','v','e'), mov_read_wave }, { MKTAG('e','s','d','s'), mov_read_esds }, { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */ { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */ { MKTAG('c','m','o','v'), mov_read_cmov }, { 0, NULL } }; static int mov_probe(AVProbeData *p) { unsigned int offset; uint32_t tag; int score = 0; /* check file header */ offset = 0; for(;;) { /* ignore invalid offset */ if ((offset + 8) > (unsigned int)p->buf_size) return score; tag = AV_RL32(p->buf + offset + 4); switch(tag) { /* check for obvious tags */ case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */ case MKTAG('m','o','o','v'): case MKTAG('m','d','a','t'): case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */ case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */ case MKTAG('f','t','y','p'): return AVPROBE_SCORE_MAX; /* those are more common words, so rate then a bit less */ case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */ case MKTAG('w','i','d','e'): case MKTAG('f','r','e','e'): case MKTAG('j','u','n','k'): case MKTAG('p','i','c','t'): return AVPROBE_SCORE_MAX - 5; case MKTAG(0x82,0x82,0x7f,0x7d): case MKTAG('s','k','i','p'): case MKTAG('u','u','i','d'): case MKTAG('p','r','f','l'): offset = AV_RB32(p->buf+offset) + offset; /* if we only find those cause probedata is too small at least rate them */ score = AVPROBE_SCORE_MAX - 50; break; default: /* unrecognized tag */ return score; } } return score; } // must be done after parsing all trak because there's no order requirement static void mov_read_chapters(AVFormatContext *s) { MOVContext *mov = s->priv_data; AVStream *st = NULL; MOVStreamContext *sc; int64_t cur_pos; int i; for (i = 0; i < s->nb_streams; i++) if (s->streams[i]->id == mov->chapter_track) { st = s->streams[i]; break; } if (!st) { av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n"); return; } st->discard = AVDISCARD_ALL; sc = st->priv_data; cur_pos = url_ftell(sc->pb); for (i = 0; i < st->nb_index_entries; i++) { AVIndexEntry *sample = &st->index_entries[i]; int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration; uint8_t *title; uint16_t ch; int len, title_len; if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) { av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i); goto finish; } // the first two bytes are the length of the title len = get_be16(sc->pb); if (len > sample->size-2) continue; title_len = 2*len + 1; if (!(title = av_mallocz(title_len))) goto finish; // The samples could theoretically be in any encoding if there's an encd // atom following, but in practice are only utf-8 or utf-16, distinguished // instead by the presence of a BOM ch = get_be16(sc->pb); if (ch == 0xfeff) avio_get_str16be(sc->pb, len, title, title_len); else if (ch == 0xfffe) avio_get_str16le(sc->pb, len, title, title_len); else { AV_WB16(title, ch); get_strz(sc->pb, title + 2, len - 1); } ff_new_chapter(s, i, st->time_base, sample->timestamp, end, title); av_freep(&title); } finish: url_fseek(sc->pb, cur_pos, SEEK_SET); } static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap) { MOVContext *mov = s->priv_data; ByteIOContext *pb = s->pb; int err; MOVAtom atom = { AV_RL32("root") }; mov->fc = s; /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */ if(!url_is_streamed(pb)) atom.size = url_fsize(pb); else atom.size = INT64_MAX; /* check MOV header */ if ((err = mov_read_default(mov, pb, atom)) < 0) { av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err); return err; } if (!mov->found_moov) { av_log(s, AV_LOG_ERROR, "moov atom not found\n"); return -1; } av_dlog(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb)); if (!url_is_streamed(pb) && mov->chapter_track > 0) mov_read_chapters(s); return 0; } static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st) { AVIndexEntry *sample = NULL; int64_t best_dts = INT64_MAX; int i; for (i = 0; i < s->nb_streams; i++) { AVStream *avst = s->streams[i]; MOVStreamContext *msc = avst->priv_data; if (msc->pb && msc->current_sample < avst->nb_index_entries) { AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample]; int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale); av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts); if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) || (!url_is_streamed(s->pb) && ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb && ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) || (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) { sample = current_sample; best_dts = dts; *st = avst; } } } return sample; } static int mov_read_packet(AVFormatContext *s, AVPacket *pkt) { MOVContext *mov = s->priv_data; MOVStreamContext *sc; AVIndexEntry *sample; AVStream *st = NULL; int ret; retry: sample = mov_find_next_sample(s, &st); if (!sample) { mov->found_mdat = 0; if (!url_is_streamed(s->pb) || mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 || url_feof(s->pb)) return AVERROR_EOF; av_dlog(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb)); goto retry; } sc = st->priv_data; /* must be done just before reading, to avoid infinite loop on sample */ sc->current_sample++; if (st->discard != AVDISCARD_ALL) { if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) { av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n", sc->ffindex, sample->pos); return -1; } ret = av_get_packet(sc->pb, pkt, sample->size); if (ret < 0) return ret; #if CONFIG_DV_DEMUXER if (mov->dv_demux && sc->dv_audio_container) { dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size); av_free(pkt->data); pkt->size = 0; ret = dv_get_packet(mov->dv_demux, pkt); if (ret < 0) return ret; } #endif } pkt->stream_index = sc->ffindex; pkt->dts = sample->timestamp; if (sc->ctts_data) { pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration; /* update ctts context */ sc->ctts_sample++; if (sc->ctts_index < sc->ctts_count && sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) { sc->ctts_index++; sc->ctts_sample = 0; } if (sc->wrong_dts) pkt->dts = AV_NOPTS_VALUE; } else { int64_t next_dts = (sc->current_sample < st->nb_index_entries) ? st->index_entries[sc->current_sample].timestamp : st->duration; pkt->duration = next_dts - pkt->dts; pkt->pts = pkt->dts; } if (st->discard == AVDISCARD_ALL) goto retry; pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0; pkt->pos = sample->pos; av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n", pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration); return 0; } static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags) { MOVStreamContext *sc = st->priv_data; int sample, time_sample; int i; sample = av_index_search_timestamp(st, timestamp, flags); av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample); if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp) sample = 0; if (sample < 0) /* not sure what to do */ return -1; sc->current_sample = sample; av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample); /* adjust ctts index */ if (sc->ctts_data) { time_sample = 0; for (i = 0; i < sc->ctts_count; i++) { int next = time_sample + sc->ctts_data[i].count; if (next > sc->current_sample) { sc->ctts_index = i; sc->ctts_sample = sc->current_sample - time_sample; break; } time_sample = next; } } return sample; } static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) { AVStream *st; int64_t seek_timestamp, timestamp; int sample; int i; if (stream_index >= s->nb_streams) return -1; if (sample_time < 0) sample_time = 0; st = s->streams[stream_index]; sample = mov_seek_stream(s, st, sample_time, flags); if (sample < 0) return -1; /* adjust seek timestamp to found sample timestamp */ seek_timestamp = st->index_entries[sample].timestamp; for (i = 0; i < s->nb_streams; i++) { st = s->streams[i]; if (stream_index == i) continue; timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base); mov_seek_stream(s, st, timestamp, flags); } return 0; } static int mov_read_close(AVFormatContext *s) { MOVContext *mov = s->priv_data; int i, j; for (i = 0; i < s->nb_streams; i++) { AVStream *st = s->streams[i]; MOVStreamContext *sc = st->priv_data; av_freep(&sc->ctts_data); for (j = 0; j < sc->drefs_count; j++) { av_freep(&sc->drefs[j].path); av_freep(&sc->drefs[j].dir); } av_freep(&sc->drefs); if (sc->pb && sc->pb != s->pb) url_fclose(sc->pb); av_freep(&st->codec->palctrl); } if (mov->dv_demux) { for(i = 0; i < mov->dv_fctx->nb_streams; i++) { av_freep(&mov->dv_fctx->streams[i]->codec); av_freep(&mov->dv_fctx->streams[i]); } av_freep(&mov->dv_fctx); av_freep(&mov->dv_demux); } av_freep(&mov->trex_data); return 0; } AVInputFormat ff_mov_demuxer = { "mov,mp4,m4a,3gp,3g2,mj2", NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"), sizeof(MOVContext), mov_probe, mov_read_header, mov_read_packet, mov_read_close, mov_read_seek, };