/* * MOV decoder. * Copyright (c) 2001 Fabrice Bellard. * * This library 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 of the License, or (at your option) any later version. * * This library 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 this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include //#define DEBUG #include "avformat.h" #include "avi.h" #include "mov.h" #ifdef CONFIG_ZLIB #include #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), * the exceptions are .mov with zlib compressed headers ('cmov' section). It shouldn't be hard to implement. * FIXED, Francois Revol, 07/17/2002 * - ffmpeg has nearly none of the usual QuickTime codecs, * although I succesfully dumped raw and mp3 audio tracks off .mov files. * Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html * - .mp4 parsing is still hazardous, although the format really is QuickTime with some minor changes * (to make .mov parser crash maybe ?), despite what they say in the MPEG FAQ at * http://mpeg.telecomitalialab.com/faq.htm * - the code is quite ugly... maybe I won't do it recursive next time :-) * - seek is not supported with files that contain edit list * * 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 /* Allows seeking */ #define MOV_SEEK /* some streams in QT (and in MP4 mostly) aren't either video nor audio */ /* so we first list them as this, then clean up the list of streams we give back, */ /* getting rid of these */ #define CODEC_TYPE_MOV_OTHER (enum CodecType) 2 /* http://gpac.sourceforge.net/tutorial/mediatypes.htm */ const CodecTag ff_mov_obj_type[] = { { CODEC_ID_MPEG4 , 32 }, { CODEC_ID_H264 , 33 }, { CODEC_ID_AAC , 64 }, { CODEC_ID_MPEG2VIDEO, 96 }, /* MPEG2 Simple */ { CODEC_ID_MPEG2VIDEO, 97 }, /* MPEG2 Main */ { CODEC_ID_MPEG2VIDEO, 98 }, /* MPEG2 SNR */ { CODEC_ID_MPEG2VIDEO, 99 }, /* MPEG2 Spatial */ { CODEC_ID_MPEG2VIDEO, 100 }, /* MPEG2 High */ { CODEC_ID_MPEG2VIDEO, 101 }, /* MPEG2 422 */ { CODEC_ID_AAC , 102 }, /* MPEG2 AAC Main */ { CODEC_ID_AAC , 103 }, /* MPEG2 AAC Low */ { CODEC_ID_AAC , 104 }, /* MPEG2 AAC SSR */ { CODEC_ID_MP3 , 105 }, { CODEC_ID_MPEG1VIDEO, 106 }, { CODEC_ID_MP2 , 107 }, { CODEC_ID_MJPEG , 108 }, { CODEC_ID_PCM_S16LE , 224 }, { CODEC_ID_VORBIS , 221 }, { CODEC_ID_AC3 , 226 }, { CODEC_ID_PCM_ALAW , 227 }, { CODEC_ID_PCM_MULAW , 228 }, { CODEC_ID_PCM_S16BE , 230 }, { CODEC_ID_H263 , 242 }, { CODEC_ID_H261 , 243 }, { 0, 0 }, }; static const CodecTag mov_video_tags[] = { /* { CODEC_ID_, MKTAG('c', 'v', 'i', 'd') }, *//* Cinepak */ /* { CODEC_ID_H263, MKTAG('r', 'a', 'w', ' ') }, *//* Uncompressed RGB */ /* { CODEC_ID_H263, MKTAG('Y', 'u', 'v', '2') }, *//* Uncompressed YUV422 */ /* { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, *//* YUV with alpha-channel (AVID Uncompressed) */ /* Graphics */ /* Animation */ /* Apple video */ /* Kodak Photo CD */ { CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */ { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */ { CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */ { CODEC_ID_MJPEGB, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */ { CODEC_ID_MJPEG, MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */ /* { CODEC_ID_MJPEG, MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */ /* { CODEC_ID_GIF, MKTAG('g', 'i', 'f', ' ') }, *//* embedded gif files as frames (usually one "click to play movie" frame) */ /* Sorenson video */ { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */ { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */ { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/ { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */ { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') }, { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */ { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') }, { CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */ /* { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */ { CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */ { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */ { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */ { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */ /* { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, *//* AVID dv */ { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */ { CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */ { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */ { CODEC_ID_8BPS, MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */ { CODEC_ID_SMC, MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */ { CODEC_ID_QTRLE, MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */ { CODEC_ID_QDRAW, MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */ { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */ { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 produced by Sony HD camera */ { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* HDV produced by FCP */ { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG2 IMX NTSC 525/60 50mb/s produced by FCP */ { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX PAL 625/50 50mb/s produced by FCP */ { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */ { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */ { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'p', 'p') }, /* DVCPRO PAL produced by FCP */ //{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '5') }, /* DVCPRO HD 50i produced by FCP */ //{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '6') }, /* DVCPRO HD 60i produced by FCP */ { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'p') }, /* DVCPRO50 PAL produced by FCP */ { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'n') }, /* DVCPRO50 NTSC produced by FCP */ { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, /* AVID DV */ //{ CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */ { CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */ { CODEC_ID_NONE, 0 }, }; static const CodecTag mov_audio_tags[] = { { CODEC_ID_PCM_S32BE, MKTAG('i', 'n', '3', '2') }, { CODEC_ID_PCM_S24BE, MKTAG('i', 'n', '2', '4') }, /* { CODEC_ID_PCM_S16BE, MKTAG('N', 'O', 'N', 'E') }, *//* uncompressed */ { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */ /* { CODEC_ID_PCM_S8, MKTAG('t', 'w', 'o', 's') },*/ /* 8 bits */ { CODEC_ID_PCM_U8, MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */ { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /* */ { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /* */ { CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') }, /* */ { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */ { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */ { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */ { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */ { CODEC_ID_MP2, 0x6D730055 }, /* MPEG layer 3 */ { CODEC_ID_MP2, 0x5500736D }, /* MPEG layer 3 *//* XXX: check endianness */ /* { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */ /* MP4 tags */ { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */ /* The standard for mpeg4 audio is still not normalised AFAIK anyway */ { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */ { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */ { CODEC_ID_AC3, MKTAG('m', 's', 0x20, 0x00) }, /* Dolby AC-3 */ { CODEC_ID_ALAC,MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */ { CODEC_ID_QDM2,MKTAG('Q', 'D', 'M', '2') }, /* QDM2 */ { CODEC_ID_NONE, 0 }, }; /* map numeric codes from mdhd atom to ISO 639 */ /* cf. QTFileFormat.pdf p253, qtff.pdf p205 */ /* http://developer.apple.com/documentation/mac/Text/Text-368.html */ /* deprecated by putting the code as 3*5bit ascii */ static const char *mov_mdhd_language_map[] = { /* 0-9 */ "eng", "fra", "ger", "ita", "dut", "sve", "spa", "dan", "por", "nor", "heb", "jpn", "ara", "fin", "gre", "ice", "mlt", "tur", "hr "/*scr*/, "chi"/*ace?*/, "urd", "hin", "tha", "kor", "lit", "pol", "hun", "est", "lav", NULL, "fo ", NULL, "rus", "chi", NULL, "iri", "alb", "ron", "ces", "slk", "slv", "yid", "sr ", "mac", "bul", "ukr", "bel", "uzb", "kaz", "aze", /*?*/ "aze", "arm", "geo", "mol", "kir", "tgk", "tuk", "mon", NULL, "pus", "kur", "kas", "snd", "tib", "nep", "san", "mar", "ben", "asm", "guj", "pa ", "ori", "mal", "kan", "tam", "tel", NULL, "bur", "khm", "lao", /* roman? arabic? */ "vie", "ind", "tgl", "may", "may", "amh", "tir", "orm", "som", "swa", /*==rundi?*/ NULL, "run", NULL, "mlg", "epo", NULL, NULL, NULL, NULL, NULL, /* 100 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "wel", "baq", "cat", "lat", "que", "grn", "aym", "tat", "uig", "dzo", "jav" }; /* the QuickTime file format is quite convoluted... * it has lots of index tables, each indexing something in another one... * Here we just use what is needed to read the chunks */ typedef struct MOV_sample_to_chunk_tbl { long first; long count; long id; } MOV_sample_to_chunk_tbl; typedef struct { uint32_t type; int64_t offset; int64_t size; /* total size (excluding the size and type fields) */ } MOV_atom_t; typedef struct { int seed; int flags; int size; void* clrs; } MOV_ctab_t; typedef struct { uint8_t version; uint32_t flags; // 24bit /* 0x03 ESDescrTag */ uint16_t es_id; #define MP4ODescrTag 0x01 #define MP4IODescrTag 0x02 #define MP4ESDescrTag 0x03 #define MP4DecConfigDescrTag 0x04 #define MP4DecSpecificDescrTag 0x05 #define MP4SLConfigDescrTag 0x06 #define MP4ContentIdDescrTag 0x07 #define MP4SupplContentIdDescrTag 0x08 #define MP4IPIPtrDescrTag 0x09 #define MP4IPMPPtrDescrTag 0x0A #define MP4IPMPDescrTag 0x0B #define MP4RegistrationDescrTag 0x0D #define MP4ESIDIncDescrTag 0x0E #define MP4ESIDRefDescrTag 0x0F #define MP4FileIODescrTag 0x10 #define MP4FileODescrTag 0x11 #define MP4ExtProfileLevelDescrTag 0x13 #define MP4ExtDescrTagsStart 0x80 #define MP4ExtDescrTagsEnd 0xFE uint8_t stream_priority; /* 0x04 DecConfigDescrTag */ uint8_t object_type_id; uint8_t stream_type; /* XXX: really streamType is * only 6bit, followed by: * 1bit upStream * 1bit reserved */ uint32_t buffer_size_db; // 24 uint32_t max_bitrate; uint32_t avg_bitrate; /* 0x05 DecSpecificDescrTag */ uint8_t decoder_cfg_len; uint8_t *decoder_cfg; /* 0x06 SLConfigDescrTag */ uint8_t sl_config_len; uint8_t *sl_config; } MOV_esds_t; struct MOVParseTableEntry; typedef struct MOVStreamContext { int ffindex; /* the ffmpeg stream id */ long next_chunk; long chunk_count; int64_t *chunk_offsets; int stts_count; Time2Sample *stts_data; int ctts_count; Time2Sample *ctts_data; int edit_count; /* number of 'edit' (elst atom) */ long sample_to_chunk_sz; MOV_sample_to_chunk_tbl *sample_to_chunk; long sample_to_chunk_index; int sample_to_time_index; long sample_to_time_sample; uint64_t sample_to_time_time; int sample_to_ctime_index; int sample_to_ctime_sample; long sample_size; long sample_count; long *sample_sizes; long keyframe_count; long *keyframes; int time_scale; int time_rate; long current_sample; long left_in_chunk; /* how many samples before next chunk */ MOV_esds_t esds; } MOVStreamContext; typedef struct MOVContext { int mp4; /* set to 1 as soon as we are sure that the file is an .mp4 file (even some header parsing depends on this) */ AVFormatContext *fc; int time_scale; int64_t duration; /* duration of the longest track */ int found_moov; /* when both 'moov' and 'mdat' sections has been found */ int found_mdat; /* we suppose we have enough data to read the file */ int64_t mdat_size; int64_t mdat_offset; int ni; ///< non interleaved mode int total_streams; /* some streams listed here aren't presented to the ffmpeg API, since they aren't either video nor audio * but we need the info to be able to skip data from those streams in the 'mdat' section */ MOVStreamContext *streams[MAX_STREAMS]; int64_t next_chunk_offset; MOVStreamContext *partial; /* != 0 : there is still to read in the current chunk */ int ctab_size; MOV_ctab_t **ctab; /* color tables */ const struct MOVParseTableEntry *parse_table; /* could be eventually used to change the table */ /* NOTE: for recursion save to/ restore from local variable! */ AVPaletteControl palette_control; } MOVContext; /* 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: 1: found what I wanted, exit 0: continue to parse next atom -1: error occured, exit */ typedef int (*mov_parse_function)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom); /* links atom IDs to parse functions */ typedef struct MOVParseTableEntry { uint32_t type; mov_parse_function func; } MOVParseTableEntry; static int ff_mov_lang_to_iso639(int code, char *to) { int i; /* is it the mangled iso code? */ /* see http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt */ if (code > 138) { for (i = 2; i >= 0; i--) { to[i] = 0x60 + (code & 0x1f); code >>= 5; } return 1; } /* old fashion apple lang code */ if (code >= (sizeof(mov_mdhd_language_map)/sizeof(char *))) return 0; if (!mov_mdhd_language_map[code]) return 0; strncpy(to, mov_mdhd_language_map[code], 4); return 1; } int ff_mov_iso639_to_lang(const char *lang, int mp4) { int i, code = 0; /* old way, only for QT? */ for (i = 0; !mp4 && (i < (sizeof(mov_mdhd_language_map)/sizeof(char *))); i++) { if (mov_mdhd_language_map[i] && !strcmp(lang, mov_mdhd_language_map[i])) return i; } /* XXX:can we do that in mov too? */ if (!mp4) return 0; /* handle undefined as such */ if (lang[0] == '\0') lang = "und"; /* 5bit ascii */ for (i = 0; i < 3; i++) { unsigned char c = (unsigned char)lang[i]; if (c < 0x60) return 0; if (c > 0x60 + 0x1f) return 0; code <<= 5; code |= (c - 0x60); } return code; } static int mov_read_leaf(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { if (atom.size>1) url_fskip(pb, atom.size); /* url_seek(pb, atom_offset+atom.size, SEEK_SET); */ return 0; } static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { int64_t total_size = 0; MOV_atom_t a; int i; int err = 0; a.offset = atom.offset; if (atom.size < 0) atom.size = 0x7fffffffffffffffLL; while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) { a.size = atom.size; a.type=0L; if(atom.size >= 8) { a.size = get_be32(pb); a.type = get_le32(pb); } total_size += 8; a.offset += 8; dprintf("type: %08x %.4s sz: %"PRIx64" %"PRIx64" %"PRIx64"\n", a.type, (char*)&a.type, a.size, atom.size, total_size); if (a.size == 1) { /* 64 bit extended size */ a.size = get_be64(pb) - 8; a.offset += 8; total_size += 8; } if (a.size == 0) { a.size = atom.size - total_size; if (a.size <= 8) break; } for (i = 0; c->parse_table[i].type != 0L && c->parse_table[i].type != a.type; i++) /* empty */; a.size -= 8; if(a.size < 0) break; if (c->parse_table[i].type == 0) { /* skip leaf atoms data */ url_fskip(pb, a.size); } else { offset_t start_pos = url_ftell(pb); int64_t left; err = (c->parse_table[i].func)(c, pb, a); left = a.size - url_ftell(pb) + start_pos; if (left > 0) /* skip garbage at atom end */ url_fskip(pb, left); } a.offset += a.size; total_size += a.size; } if (!err && total_size < atom.size && atom.size < 0x7ffff) { url_fskip(pb, atom.size - total_size); } return err; } static int mov_read_ctab(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { #if 1 url_fskip(pb, atom.size); // for now #else VERY VERY BROKEN, NEVER execute this, needs rewrite unsigned int len; MOV_ctab_t *t; c->ctab = av_realloc(c->ctab, ++c->ctab_size); t = c->ctab[c->ctab_size]; t->seed = get_be32(pb); t->flags = get_be16(pb); t->size = get_be16(pb) + 1; len = 2 * t->size * 4; if (len > 0) { t->clrs = av_malloc(len); // 16bit A R G B if (t->clrs) get_buffer(pb, t->clrs, len); } #endif return 0; } static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; int len = 0; uint32_t type; uint32_t ctype; get_byte(pb); /* version */ get_byte(pb); get_byte(pb); get_byte(pb); /* flags */ /* component type */ ctype = get_le32(pb); type = get_le32(pb); /* component subtype */ dprintf("ctype= %c%c%c%c (0x%08lx)\n", *((char *)&ctype), ((char *)&ctype)[1], ((char *)&ctype)[2], ((char *)&ctype)[3], (long) ctype); dprintf("stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]); if(ctype == MKTAG('m', 'h', 'l', 'r')) /* MOV */ c->mp4 = 0; else if(ctype == 0) c->mp4 = 1; if(type == MKTAG('v', 'i', 'd', 'e')) st->codec->codec_type = CODEC_TYPE_VIDEO; else if(type == MKTAG('s', 'o', 'u', 'n')) st->codec->codec_type = CODEC_TYPE_AUDIO; get_be32(pb); /* component manufacture */ get_be32(pb); /* component flags */ get_be32(pb); /* component flags mask */ if(atom.size <= 24) return 0; /* nothing left to read */ /* XXX: MP4 uses a C string, not a pascal one */ /* component name */ if(c->mp4) { /* .mp4: C string */ while(get_byte(pb) && (++len < (atom.size - 24))); } else { /* .mov: PASCAL string */ len = get_byte(pb); url_fskip(pb, len); } url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset)); return 0; } static int mov_mp4_read_descr_len(ByteIOContext *pb) { int len = 0; int count = 4; while (count--) { int c = get_byte(pb); len = (len << 7) | (c & 0x7f); if (!(c & 0x80)) break; } return len; } static int mov_mp4_read_descr(ByteIOContext *pb, int *tag) { int len; *tag = get_byte(pb); len = mov_mp4_read_descr_len(pb); dprintf("MPEG4 description: tag=0x%02x len=%d\n", *tag, len); return len; } static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; int tag, len; /* Well, broken but suffisant for some MP4 streams */ get_be32(pb); /* version + flags */ len = mov_mp4_read_descr(pb, &tag); if (tag == MP4ESDescrTag) { get_be16(pb); /* ID */ get_byte(pb); /* priority */ } else get_be16(pb); /* ID */ len = mov_mp4_read_descr(pb, &tag); if (tag == MP4DecConfigDescrTag) { sc->esds.object_type_id = get_byte(pb); sc->esds.stream_type = get_byte(pb); sc->esds.buffer_size_db = get_be24(pb); sc->esds.max_bitrate = get_be32(pb); sc->esds.avg_bitrate = get_be32(pb); st->codec->codec_id= codec_get_id(ff_mov_obj_type, sc->esds.object_type_id); len = mov_mp4_read_descr(pb, &tag); if (tag == MP4DecSpecificDescrTag) { dprintf("Specific MPEG4 header len=%d\n", len); st->codec->extradata = (uint8_t*) av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE); if (st->codec->extradata) { get_buffer(pb, st->codec->extradata, len); st->codec->extradata_size = len; /* from mplayer */ if ((*(uint8_t *)st->codec->extradata >> 3) == 29) { st->codec->codec_id = CODEC_ID_MP3ON4; } } } } return 0; } /* this atom contains actual media data */ static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { if(atom.size == 0) /* wrong one (MP4) */ return 0; c->found_mdat=1; c->mdat_offset = atom.offset; c->mdat_size = atom.size; if(c->found_moov) return 1; /* found both, just go */ url_fskip(pb, atom.size); return 0; /* now go for moov */ } static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { uint32_t type = get_le32(pb); /* from mplayer */ switch (type) { case MKTAG('i', 's', 'o', 'm'): case MKTAG('m', 'p', '4', '1'): case MKTAG('m', 'p', '4', '2'): case MKTAG('3', 'g', 'p', '1'): case MKTAG('3', 'g', 'p', '2'): case MKTAG('3', 'g', '2', 'a'): case MKTAG('3', 'g', 'p', '3'): case MKTAG('3', 'g', 'p', '4'): case MKTAG('3', 'g', 'p', '5'): case MKTAG('m', 'm', 'p', '4'): /* Mobile MP4 */ case MKTAG('M', '4', 'A', ' '): /* Apple iTunes AAC-LC Audio */ case MKTAG('M', '4', 'P', ' '): /* Apple iTunes AAC-LC Protected Audio */ case MKTAG('m', 'j', 'p', '2'): /* Motion Jpeg 2000 */ c->mp4 = 1; case MKTAG('q', 't', ' ', ' '): default: av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type); } get_be32(pb); /* minor version */ url_fskip(pb, atom.size - 8); return 0; } /* this atom should contain all header atoms */ static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { int err; err = mov_read_default(c, pb, atom); /* 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; if(c->found_mdat) return 1; /* found both, just go */ return 0; /* now go for mdat */ } static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; int version = get_byte(pb); int lang; if (version > 1) return 1; /* unsupported */ get_byte(pb); get_byte(pb); get_byte(pb); /* flags */ if (version == 1) { get_be64(pb); get_be64(pb); } else { get_be32(pb); /* creation time */ get_be32(pb); /* modification time */ } sc->time_scale = get_be32(pb); st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */ lang = get_be16(pb); /* language */ ff_mov_lang_to_iso639(lang, st->language); get_be16(pb); /* quality */ return 0; } static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { int version = get_byte(pb); /* version */ get_byte(pb); get_byte(pb); get_byte(pb); /* flags */ if (version == 1) { get_be64(pb); get_be64(pb); } else { get_be32(pb); /* creation time */ get_be32(pb); /* modification time */ } c->time_scale = get_be32(pb); /* time scale */ #ifdef DEBUG av_log(NULL, AV_LOG_DEBUG, "time scale = %i\n", c->time_scale); #endif 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, MOV_atom_t atom) { AVStream *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_size = 0x5a + atom.size; st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); if (st->codec->extradata) { strcpy(st->codec->extradata, "SVQ3"); // fake get_buffer(pb, st->codec->extradata + 0x5a, atom.size); dprintf("Reading SMI %"PRId64" %s\n", atom.size, (char*)st->codec->extradata + 0x5a); } else url_fskip(pb, atom.size); return 0; } static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; int little_endian = get_be16(pb); if (little_endian) { 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; default: break; } } return 0; } static int mov_read_alac(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; // currently ALAC decoder expect full atom header - so let's fake it // this should be fixed and just ALAC header should be passed av_free(st->codec->extradata); st->codec->extradata_size = 36; st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); if (st->codec->extradata) { strcpy(st->codec->extradata + 4, "alac"); // fake get_buffer(pb, st->codec->extradata + 8, 36 - 8); dprintf("Reading alac %d %s\n", st->codec->extradata_size, (char*)st->codec->extradata); } else url_fskip(pb, atom.size); return 0; } static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *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_size = atom.size; st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); if (st->codec->extradata) { get_buffer(pb, st->codec->extradata, atom.size); } else url_fskip(pb, atom.size); } else if (atom.size > 8) { /* to read frma, esds atoms */ mov_read_default(c, pb, atom); } else url_fskip(pb, atom.size); return 0; } static int mov_read_jp2h(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *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_size = atom.size + 8; st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); /* pass all jp2h atom to codec */ if (st->codec->extradata) { strcpy(st->codec->extradata + 4, "jp2h"); get_buffer(pb, st->codec->extradata + 8, atom.size); } else url_fskip(pb, atom.size); return 0; } static int mov_read_avcC(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *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_size = atom.size; st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); if (st->codec->extradata) { get_buffer(pb, st->codec->extradata, atom.size); } else url_fskip(pb, atom.size); return 0; } static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; unsigned int i, entries; get_byte(pb); /* version */ get_byte(pb); get_byte(pb); get_byte(pb); /* flags */ entries = get_be32(pb); if(entries >= UINT_MAX/sizeof(int64_t)) return -1; sc->chunk_count = entries; sc->chunk_offsets = (int64_t*) av_malloc(entries * sizeof(int64_t)); if (!sc->chunk_offsets) return -1; if (atom.type == MKTAG('s', 't', 'c', 'o')) { for(i=0; ichunk_offsets[i] = get_be32(pb); } } else if (atom.type == MKTAG('c', 'o', '6', '4')) { for(i=0; ichunk_offsets[i] = get_be64(pb); } } else return -1; for(i=0; ifc->nb_streams; i++){ MOVStreamContext *sc2 = (MOVStreamContext *)c->fc->streams[i]->priv_data; if(sc2 && sc2->chunk_offsets){ int64_t first= sc2->chunk_offsets[0]; int64_t last= sc2->chunk_offsets[sc2->chunk_count-1]; if(first >= sc->chunk_offsets[entries-1] || last <= sc->chunk_offsets[0]) c->ni=1; } } return 0; } static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; int entries, frames_per_sample; uint32_t format; uint8_t codec_name[32]; /* for palette traversal */ int color_depth; int color_start; int color_count; int color_end; int color_index; int color_dec; int color_greyscale; unsigned char *color_table; int j; unsigned char r, g, b; get_byte(pb); /* version */ get_byte(pb); get_byte(pb); get_byte(pb); /* flags */ entries = get_be32(pb); while(entries--) { //Parsing Sample description table enum CodecID id; MOV_atom_t a = { 0, 0, 0 }; offset_t start_pos = url_ftell(pb); int size = get_be32(pb); /* size */ format = get_le32(pb); /* data format */ get_be32(pb); /* reserved */ get_be16(pb); /* reserved */ get_be16(pb); /* index */ st->codec->codec_tag = format; id = codec_get_id(mov_audio_tags, format); if (id > 0) { st->codec->codec_type = CODEC_TYPE_AUDIO; } else if (format && format != MKTAG('m', 'p', '4', 's')) { /* skip old asf mpeg4 tag */ id = codec_get_id(mov_video_tags, format); if (id <= 0) id = codec_get_id(codec_bmp_tags, format); if (id > 0) st->codec->codec_type = CODEC_TYPE_VIDEO; } dprintf("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==CODEC_TYPE_VIDEO) { 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); /* spacial 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 */ frames_per_sample = get_be16(pb); /* frames per samples */ #ifdef DEBUG av_log(NULL, AV_LOG_DEBUG, "frames/samples = %d\n", frames_per_sample); #endif get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */ if (codec_name[0] <= 31) { memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]); st->codec->codec_name[codec_name[0]] = 0; } st->codec->bits_per_sample = get_be16(pb); /* depth */ st->codec->color_table_id = get_be16(pb); /* colortable id */ /* These are set in mov_read_stts and might already be set! st->codec->time_base.den = 25; st->codec->time_base.num = 1; */ /* figure out the palette situation */ color_depth = st->codec->bits_per_sample & 0x1F; color_greyscale = st->codec->bits_per_sample & 0x20; /* if the depth is 2, 4, or 8 bpp, file is palettized */ if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) { if (color_greyscale) { /* compute the greyscale palette */ 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; c->palette_control.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 & 0x08) { /* 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 * 4 + 0]; g = color_table[j * 4 + 1]; b = color_table[j * 4 + 2]; c->palette_control.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); 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); c->palette_control.palette[j] = (r << 16) | (g << 8) | (b); } } st->codec->palctrl = &c->palette_control; st->codec->palctrl->palette_changed = 1; } else st->codec->palctrl = NULL; } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) { 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 */ st->codec->bits_per_sample = get_be16(pb); /* sample size */ /* do we need to force to 16 for AMR ? */ /* handle specific s8 codec */ get_be16(pb); /* compression id = 0*/ get_be16(pb); /* packet size = 0 */ st->codec->sample_rate = ((get_be32(pb) >> 16)); switch (st->codec->codec_id) { case CODEC_ID_PCM_S16LE: case CODEC_ID_PCM_S16BE: if (st->codec->bits_per_sample == 8) st->codec->codec_id = CODEC_ID_PCM_S8; st->codec->bit_rate = st->codec->sample_rate * 8; break; case CODEC_ID_PCM_U8: if (st->codec->bits_per_sample == 16) st->codec->codec_id = CODEC_ID_PCM_S16BE; st->codec->bit_rate = st->codec->sample_rate * 8; break; case CODEC_ID_AMR_WB: st->codec->sample_rate = 16000; /* should really we ? */ st->codec->channels=1; /* really needed */ break; case CODEC_ID_AMR_NB: st->codec->sample_rate = 8000; /* should really we ? */ st->codec->channels=1; /* really needed */ break; default: break; } //Read QT version 1 fields. In version 0 theese dont exist dprintf("version =%d mp4=%d\n",version,c->mp4); if(version==1) { get_be32(pb); /* samples per packet */ get_be32(pb); /* bytes per packet */ get_be32(pb); /* bytes per frame */ 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 */ get_be32(pb); /* bits per channel if sound is uncompressed */ get_be32(pb); /* lcpm format specific flag */ get_be32(pb); /* bytes per audio packet if constant */ get_be32(pb); /* lpcm frames per audio packet if constant */ } } 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) mov_read_default(c, pb, a); else if (a.size > 0) url_fskip(pb, a.size); } if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1) { st->codec->sample_rate= sc->time_scale; } switch (st->codec->codec_id) { #ifdef CONFIG_FAAD case CODEC_ID_AAC: #endif #ifdef CONFIG_VORBIS_DECODER case CODEC_ID_VORBIS: #endif case CODEC_ID_MP3ON4: st->codec->sample_rate= 0; /* let decoder init parameters properly */ break; default: break; } return 0; } static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; unsigned int i, entries; get_byte(pb); /* version */ get_byte(pb); get_byte(pb); get_byte(pb); /* flags */ entries = get_be32(pb); if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl)) return -1; #ifdef DEBUG av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries); #endif sc->sample_to_chunk_sz = entries; sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl)); if (!sc->sample_to_chunk) return -1; for(i=0; isample_to_chunk[i].first = get_be32(pb); sc->sample_to_chunk[i].count = get_be32(pb); sc->sample_to_chunk[i].id = get_be32(pb); } return 0; } static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; unsigned int i, entries; get_byte(pb); /* version */ get_byte(pb); get_byte(pb); get_byte(pb); /* flags */ entries = get_be32(pb); if(entries >= UINT_MAX / sizeof(long)) return -1; sc->keyframe_count = entries; #ifdef DEBUG av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count); #endif sc->keyframes = (long*) av_malloc(entries * sizeof(long)); if (!sc->keyframes) return -1; for(i=0; ikeyframes[i] = get_be32(pb); #ifdef DEBUG /* av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */ #endif } return 0; } static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; unsigned int i, entries; get_byte(pb); /* version */ get_byte(pb); get_byte(pb); get_byte(pb); /* flags */ sc->sample_size = get_be32(pb); entries = get_be32(pb); if(entries >= UINT_MAX / sizeof(long)) return -1; sc->sample_count = entries; #ifdef DEBUG av_log(NULL, AV_LOG_DEBUG, "sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count); #endif if(sc->sample_size) { /* override sample size for uncompressed sound */ switch (st->codec->codec_id) { case CODEC_ID_PCM_S32BE: case CODEC_ID_PCM_S32LE: sc->sample_size = 4 * st->codec->channels; break; case CODEC_ID_PCM_S24BE: case CODEC_ID_PCM_S24LE: sc->sample_size = 3 * st->codec->channels; break; case CODEC_ID_PCM_S16BE: case CODEC_ID_PCM_S16LE: sc->sample_size = 2 * st->codec->channels; break; case CODEC_ID_PCM_MULAW: case CODEC_ID_PCM_ALAW: case CODEC_ID_PCM_S8: case CODEC_ID_PCM_U8: sc->sample_size = 1 * st->codec->channels; break; default: break; } assert(sc->sample_size); return 0; /* there isn't any table following */ } sc->sample_sizes = (long*) av_malloc(entries * sizeof(long)); if (!sc->sample_sizes) return -1; for(i=0; isample_sizes[i] = get_be32(pb); #ifdef DEBUG av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]); #endif } return 0; } static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; unsigned int i, entries; int64_t duration=0; int64_t total_sample_count=0; get_byte(pb); /* version */ get_byte(pb); get_byte(pb); get_byte(pb); /* flags */ entries = get_be32(pb); if(entries >= UINT_MAX / sizeof(Time2Sample)) return -1; sc->stts_count = entries; sc->stts_data = av_malloc(entries * sizeof(Time2Sample)); #ifdef DEBUG av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries); #endif sc->time_rate=0; for(i=0; istts_data[i].count= sample_count; sc->stts_data[i].duration= sample_duration; sc->time_rate= ff_gcd(sc->time_rate, sample_duration); dprintf("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, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; unsigned int i, entries; get_byte(pb); /* version */ get_byte(pb); get_byte(pb); get_byte(pb); /* flags */ entries = get_be32(pb); if(entries >= UINT_MAX / sizeof(Time2Sample)) return -1; sc->ctts_count = entries; sc->ctts_data = av_malloc(entries * sizeof(Time2Sample)); dprintf("track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries); for(i=0; ifc, AV_LOG_ERROR, "negative ctts, ignoring\n"); sc->ctts_count = 0; url_fskip(pb, 8 * (entries - i - 1)); break; } sc->ctts_data[i].count = count; sc->ctts_data[i].duration= duration; sc->time_rate= ff_gcd(sc->time_rate, duration); } return 0; } static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st; MOVStreamContext *sc; st = av_new_stream(c->fc, c->fc->nb_streams); if (!st) return -2; sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext)); if (!sc) { av_free(st); return -1; } sc->sample_to_chunk_index = -1; st->priv_data = sc; st->codec->codec_type = CODEC_TYPE_MOV_OTHER; st->start_time = 0; /* XXX: check */ c->streams[c->fc->nb_streams-1] = sc; return mov_read_default(c, pb, atom); } static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { AVStream *st = c->fc->streams[c->fc->nb_streams-1]; int version = get_byte(pb); get_byte(pb); get_byte(pb); get_byte(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 */ st->start_time = 0; /* check */ (version == 1) ? get_be64(pb) : get_be32(pb); /* highlevel (considering edits) duration in movie timebase */ 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 */ url_fskip(pb, 36); /* display matrix */ /* those are fixed-point */ get_be32(pb); /* track width */ get_be32(pb); /* track height */ 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, MOV_atom_t 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.offset += 8; 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; } #ifdef CONFIG_ZLIB static int null_read_packet(void *opaque, uint8_t *buf, int buf_size) { return -1; } static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { ByteIOContext ctx; uint8_t *cmov_data; uint8_t *moov_data; /* uncompressed data */ long cmov_len, moov_len; int ret; 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(NULL, 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 = (uint8_t *) av_malloc(cmov_len); if (!cmov_data) return -1; moov_data = (uint8_t *) av_malloc(moov_len); if (!moov_data) { av_free(cmov_data); return -1; } get_buffer(pb, cmov_data, cmov_len); if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK) return -1; if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0) return -1; ctx.buf_end = ctx.buffer + moov_len; atom.type = MKTAG( 'm', 'o', 'o', 'v' ); atom.offset = 0; 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); av_free(moov_data); av_free(cmov_data); return ret; } #endif /* edit list atom */ static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) { int i, edit_count; get_byte(pb); /* version */ get_byte(pb); get_byte(pb); get_byte(pb); /* flags */ edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb); /* entries */ for(i=0; ifc->nb_streams-1, c->streams[c->fc->nb_streams-1]->edit_count); return 0; } static const MOVParseTableEntry mov_default_parse_table[] = { /* mp4 atoms */ { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco }, { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default }, { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default }, { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */ { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */ { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf }, { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf }, { 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', 'r', 'e', 'e' ), mov_read_leaf }, { MKTAG( 'f', 't', 'y', 'p' ), mov_read_ftyp }, { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr }, { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf }, { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf }, { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf }, { MKTAG( 'j', 'p', '2', 'h' ), mov_read_jp2h }, { 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', 'i', 'n', 'f' ), mov_read_default }, { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov }, { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default }, { MKTAG( 'm', 'p', '4', 's' ), mov_read_default }, { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default }, { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf }, { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd }, { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf }, { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default }, { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default }, { MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf }, { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */ { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */ { MKTAG( 'a', 'l', 'a', 'c' ), mov_read_alac }, /* alac specific atom */ { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC }, { MKTAG( 's', 't', 'b', 'l' ), mov_read_default }, { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco }, { MKTAG( 's', 't', 'd', 'p' ), mov_read_default }, { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc }, { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */ { MKTAG( 's', 't', 's', 'h' ), mov_read_default }, { 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( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */ { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak }, { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */ { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf }, { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf }, { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf }, { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_leaf }, { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */ { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_wave }, /* extra mp4 */ { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf }, /* QT atoms */ { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf }, { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default }, { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf }, { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab }, { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds }, { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf }, { MKTAG( 'm', 'a', 't', 't' ), mov_read_default }, { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf }, { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default }, { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf }, { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default }, { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf }, { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf }, { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf }, { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf }, { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */ //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf }, #ifdef CONFIG_ZLIB { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov }, #else { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf }, #endif { 0L, mov_read_leaf } }; static void mov_free_stream_context(MOVStreamContext *sc) { if(sc) { av_freep(&sc->chunk_offsets); av_freep(&sc->sample_to_chunk); av_freep(&sc->sample_sizes); av_freep(&sc->keyframes); av_freep(&sc->stts_data); av_freep(&sc->ctts_data); av_freep(&sc); } } static inline uint32_t mov_to_tag(uint8_t *buf) { return MKTAG(buf[0], buf[1], buf[2], buf[3]); } static inline uint32_t to_be32(uint8_t *buf) { return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; } /* XXX: is it sufficient ? */ static int mov_probe(AVProbeData *p) { unsigned int offset; uint32_t tag; int score = 0; /* check file header */ if (p->buf_size <= 12) return 0; offset = 0; for(;;) { /* ignore invalid offset */ if ((offset + 8) > (unsigned int)p->buf_size) return score; tag = mov_to_tag(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 */ return AVPROBE_SCORE_MAX; /* those are more common words, so rate then a bit less */ 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( 'f', 't', 'y', 'p' ): case MKTAG( 's', 'k', 'i', 'p' ): case MKTAG( 'u', 'u', 'i', 'd' ): offset = to_be32(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; } static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap) { MOVContext *mov = (MOVContext *) s->priv_data; ByteIOContext *pb = &s->pb; int i, j, err; MOV_atom_t atom = { 0, 0, 0 }; mov->fc = s; mov->parse_table = mov_default_parse_table; if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */ atom.size = url_fsize(pb); else atom.size = 0x7FFFFFFFFFFFFFFFLL; /* check MOV header */ err = mov_read_default(mov, pb, atom); if (err<0 || (!mov->found_moov && !mov->found_mdat)) { av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%"PRId64"\n", err, mov->found_moov, mov->found_mdat, url_ftell(pb)); return -1; } dprintf("on_parse_exit_offset=%d\n", (int) url_ftell(pb)); /* some cleanup : make sure we are on the mdat atom */ if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset)) url_fseek(pb, mov->mdat_offset, SEEK_SET); mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */ for(i=0; inb_streams;) { MOVStreamContext *sc = (MOVStreamContext *)s->streams[i]->priv_data; if(s->streams[i]->codec->codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */ av_free(s->streams[i]); mov_free_stream_context(sc); for(j=i+1; jnb_streams; j++) { s->streams[j-1] = s->streams[j]; mov->streams[j-1] = mov->streams[j]; } s->nb_streams--; } else { if(!sc->time_rate) sc->time_rate=1; if(!sc->time_scale) sc->time_scale= mov->time_scale; av_set_pts_info(s->streams[i], 64, sc->time_rate, sc->time_scale); if(s->streams[i]->duration != AV_NOPTS_VALUE){ assert(s->streams[i]->duration % sc->time_rate == 0); s->streams[i]->duration /= sc->time_rate; } sc->ffindex = i; i++; } } mov->total_streams = s->nb_streams; return 0; } /* Yes, this is ugly... I didn't write the specs of QT :p */ /* XXX:remove useless commented code sometime */ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt) { MOVContext *mov = (MOVContext *) s->priv_data; MOVStreamContext *sc; AVStream *st; int64_t offset = INT64_MAX; int64_t best_dts = INT64_MAX; int i, a, b, m; int next_sample= -99; int size; int idx; size = 0x0FFFFFFF; if (mov->partial) { sc = mov->partial; idx = sc->sample_to_chunk_index; if (idx < 0) return 0; dprintf("sc[ffid %d]->sample_size = %ld\n", sc->ffindex, sc->sample_size); //size = sc->sample_sizes[sc->current_sample]; // that ain't working... //size = (sc->sample_size)?sc->sample_size:sc->sample_sizes[sc->current_sample]; size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample]; next_sample= sc->current_sample+1; sc->left_in_chunk--; if (sc->left_in_chunk <= 0) mov->partial = 0; offset = mov->next_chunk_offset; /* extract the sample */ goto readchunk; } again: sc = 0; if(offset == INT64_MAX) best_dts= INT64_MAX; for(i=0; itotal_streams; i++) { MOVStreamContext *msc = mov->streams[i]; if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0){ if (msc->sample_to_time_index < msc->stts_count && mov->ni) { int64_t dts; int index= msc->sample_to_time_index; int sample= msc->sample_to_time_sample; int time= msc->sample_to_time_time; int duration = msc->stts_data[index].duration; int count = msc->stts_data[index].count; if (sample + count <= msc->current_sample) { sample += count; time += count*duration; index ++; duration = msc->stts_data[index].duration; } dts = time + (msc->current_sample - sample) * (int64_t)duration; dts = av_rescale(dts, AV_TIME_BASE, msc->time_scale); dprintf("stream: %d dts: %"PRId64" best_dts: %"PRId64" offset: %"PRId64"\n", i, dts, best_dts, offset); if(dts < best_dts){ best_dts= dts; sc = msc; offset = msc->chunk_offsets[msc->next_chunk]; } }else{ if ((msc->chunk_offsets[msc->next_chunk] < offset)) { sc = msc; offset = msc->chunk_offsets[msc->next_chunk]; } } } } if (!sc || offset==INT64_MAX) return -1; sc->next_chunk++; if(mov->next_chunk_offset < offset) { /* some meta data */ url_fskip(&s->pb, (offset - mov->next_chunk_offset)); mov->next_chunk_offset = offset; } if(s->streams[sc->ffindex]->discard >= AVDISCARD_ALL) { url_fskip(&s->pb, (offset - mov->next_chunk_offset)); mov->next_chunk_offset = offset; offset = INT64_MAX; goto again; } idx = sc->sample_to_chunk_index; if (idx + 1 < sc->sample_to_chunk_sz && sc->next_chunk >= sc->sample_to_chunk[idx + 1].first) idx++; sc->sample_to_chunk_index = idx; /* split chunks into samples */ if (sc->sample_size == 0 || sc->sample_size > 100) { if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) { mov->partial = sc; /* we'll have to get those samples before next chunk */ sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1; } size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample]; next_sample= sc->current_sample+1; }else{ int adjusted= 0; /* get the chunk size... */ for(i=0; itotal_streams; i++) { MOVStreamContext *msc = mov->streams[i]; if ((msc->next_chunk < msc->chunk_count) && msc->chunk_offsets[msc->next_chunk] - offset < size && msc->chunk_offsets[msc->next_chunk] > offset) size = msc->chunk_offsets[msc->next_chunk] - offset; } //Make sure that size is according to sample_size (Needed by .mov files //created on a Minolta Dimage Xi where audio chunks contains waste data in the end) //needed for 'raw ' //sample_size is already adjusted in read_stsz adjusted= sc->sample_to_chunk[idx].count * sc->sample_size; if (adjusted < size) { dprintf("adjusted %d, size %d, sample count %ld\n", adjusted, size, sc->sample_to_chunk[idx].count); size = adjusted; } if(idx < sc->sample_to_chunk_sz){ next_sample= sc->current_sample + sc->sample_to_chunk[idx].count; }else next_sample= sc->current_sample; } readchunk: dprintf("chunk: %"PRId64" -> %"PRId64" (%i)\n", offset, offset + size, size); if(size == 0x0FFFFFFF) size = mov->mdat_size + mov->mdat_offset - offset; if(size < 0) return -1; if(size == 0) return -1; url_fseek(&s->pb, offset, SEEK_SET); av_get_packet(&s->pb, pkt, size); pkt->stream_index = sc->ffindex; // If the keyframes table exists, mark any samples that are in the table as key frames. // If no table exists, treat very sample as a key frame. if (sc->keyframe_count) { a = 0; b = sc->keyframe_count - 1; while (a < b) { m = (a + b + 1) >> 1; if (sc->keyframes[m] > sc->current_sample) { b = m - 1; } else { a = m; } } if (sc->keyframes[a] == sc->current_sample) pkt->flags |= PKT_FLAG_KEY; } else pkt->flags |= PKT_FLAG_KEY; mov->next_chunk_offset = offset + size; /* find the corresponding dts */ if (sc && sc->sample_to_time_index < sc->stts_count && pkt) { unsigned int count; uint64_t dts, pts; unsigned int duration = sc->stts_data[sc->sample_to_time_index].duration; count = sc->stts_data[sc->sample_to_time_index].count; if ((sc->sample_to_time_sample + count) <= sc->current_sample) { sc->sample_to_time_sample += count; sc->sample_to_time_time += count*duration; sc->sample_to_time_index ++; duration = sc->stts_data[sc->sample_to_time_index].duration; } dts = sc->sample_to_time_time + (sc->current_sample - sc->sample_to_time_sample) * (int64_t)duration; /* find the corresponding pts */ if (sc->sample_to_ctime_index < sc->ctts_count) { int duration = sc->ctts_data[sc->sample_to_ctime_index].duration; int count = sc->ctts_data[sc->sample_to_ctime_index].count; if ((sc->sample_to_ctime_sample + count) <= sc->current_sample) { sc->sample_to_ctime_sample += count; sc->sample_to_ctime_index ++; duration = sc->ctts_data[sc->sample_to_ctime_index].duration; } pts = dts + duration; }else pts = dts; st= s->streams[ sc->ffindex ]; assert(pts % st->time_base.num == 0); assert(dts % st->time_base.num == 0); pkt->pts = pts / st->time_base.num; pkt->dts = dts / st->time_base.num; dprintf("stream #%d smp #%ld dts = %"PRId64" pts = %"PRId64" (smp:%ld time:%"PRId64" idx:%d ent:%d count:%d dur:%d)\n" , pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts , sc->sample_to_time_sample , sc->sample_to_time_time , sc->sample_to_time_index , sc->stts_count , count , duration); } assert(next_sample>=0); sc->current_sample= next_sample; return 0; } #if defined(MOV_SEEK) /** * Seek method based on the one described in the Appendix C of QTFileFormat.pdf */ static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) { MOVContext* mov = (MOVContext *) s->priv_data; MOVStreamContext* sc; int32_t i, a, b, m; int64_t start_time; int32_t seek_sample, sample; int32_t duration; int32_t count; int32_t chunk; int32_t left_in_chunk; int64_t chunk_file_offset; int64_t sample_file_offset; int32_t first_chunk_sample; int32_t sample_to_chunk_idx; int sample_to_time_index; long sample_to_time_sample = 0; uint64_t sample_to_time_time = 0; int mov_idx; // Find the corresponding mov stream for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++) if (mov->streams[mov_idx]->ffindex == stream_index) break; if (mov_idx == mov->total_streams) { av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index); return -1; } sc = mov->streams[mov_idx]; sample_time *= s->streams[stream_index]->time_base.num; // Step 1. Find the edit that contains the requested time (elst) if (sc->edit_count && 0) { // FIXME should handle edit list av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count); return -1; } // Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */ dprintf("Searching for time %li in stream #%i (time_scale=%i)\n", (long)sample_time, mov_idx, sc->time_scale); start_time = 0; // FIXME use elst atom sample = 1; // sample are 0 based in table for (i = 0; i < sc->stts_count; i++) { count = sc->stts_data[i].count; duration = sc->stts_data[i].duration; if ((start_time + count*duration) > sample_time) { sample_to_time_time = start_time; sample_to_time_index = i; sample_to_time_sample = sample; sample += (sample_time - start_time) / duration; break; } sample += count; start_time += count * duration; } sample_to_time_time = start_time; sample_to_time_index = i; /* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */ dprintf("Found time %li at sample #%u\n", (long)sample_time, sample); if (sample > sc->sample_count) { av_log(s, AV_LOG_ERROR, "mov: sample pos is too high, unable to seek (req. sample=%i, sample count=%ld)\n", sample, sc->sample_count); return -1; } // Step 3. Find the prior sync. sample using the Sync sample atom (stss) if (sc->keyframe_count) { a = 0; b = sc->keyframe_count - 1; while (a < b) { m = (a + b + 1) >> 1; if (sc->keyframes[m] > sample) { b = m - 1; } else { a = m; } } // for low latency prob: always use the previous keyframe, just uncomment the next line // if (a) a--; seek_sample = sc->keyframes[a]; } else seek_sample = sample; // else all samples are key frames dprintf("Found nearest keyframe at sample #%i \n", seek_sample); // Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc) for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) { b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count; if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b)) break; first_chunk_sample += b; } chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count; left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count; first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count; sample_to_chunk_idx = i; dprintf("Sample was found in chunk #%i at sample offset %i (idx %i)\n", chunk, seek_sample - first_chunk_sample, sample_to_chunk_idx); // Step 5. Find the offset of the chunk using the chunk offset atom if (!sc->chunk_offsets) { av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n"); return -1; } if (chunk > sc->chunk_count) { av_log(s, AV_LOG_ERROR, "mov: chunk offset atom too short, unable to seek (req. chunk=%i, chunk count=%li)\n", chunk, sc->chunk_count); return -1; } chunk_file_offset = sc->chunk_offsets[chunk - 1]; dprintf("Chunk file offset is #%"PRIu64"\n", chunk_file_offset); // Step 6. Find the byte offset within the chunk using the sample size atom sample_file_offset = chunk_file_offset; if (sc->sample_size) sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size; else { for (i = 0; i < (seek_sample - first_chunk_sample); i++) { sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1]; } } dprintf("Sample file offset is #%"PRIu64"\n", sample_file_offset); // Step 6. Update the parser mov->partial = sc; mov->next_chunk_offset = sample_file_offset; // Update current stream state sc->current_sample = seek_sample - 1; // zero based sc->left_in_chunk = left_in_chunk; sc->next_chunk = chunk; // +1 -1 (zero based) sc->sample_to_chunk_index = sample_to_chunk_idx; // Update other streams for (i = 0; itotal_streams; i++) { MOVStreamContext *msc; if (i == mov_idx) continue; // Find the nearest 'next' chunk msc = mov->streams[i]; a = 0; b = msc->chunk_count - 1; while (a < b) { m = (a + b + 1) >> 1; if (msc->chunk_offsets[m] > chunk_file_offset) { b = m - 1; } else { a = m; } } msc->next_chunk = a; if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1)) msc->next_chunk ++; dprintf("Nearest next chunk for stream #%i is #%li @%"PRId64"\n", i, msc->next_chunk+1, msc->chunk_offsets[msc->next_chunk]); // Compute sample count and index in the sample_to_chunk table (what a pity) msc->sample_to_chunk_index = 0; msc->current_sample = 0; for(; msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1) && msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) { msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \ * msc->sample_to_chunk[msc->sample_to_chunk_index].count; } msc->current_sample += (msc->next_chunk - (msc->sample_to_chunk[msc->sample_to_chunk_index].first - 1)) * msc->sample_to_chunk[msc->sample_to_chunk_index].count; msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1; // Find corresponding position in stts (used later to compute dts) sample = 0; start_time = 0; for (msc->sample_to_time_index = 0; msc->sample_to_time_index < msc->stts_count; msc->sample_to_time_index++) { count = msc->stts_data[msc->sample_to_time_index].count; duration = msc->stts_data[msc->sample_to_time_index].duration; if ((sample + count - 1) > msc->current_sample) { msc->sample_to_time_time = start_time; msc->sample_to_time_sample = sample; break; } sample += count; start_time += count * duration; } sample = 0; for (msc->sample_to_ctime_index = 0; msc->sample_to_ctime_index < msc->ctts_count; msc->sample_to_ctime_index++) { count = msc->ctts_data[msc->sample_to_ctime_index].count; duration = msc->ctts_data[msc->sample_to_ctime_index].duration; if ((sample + count - 1) > msc->current_sample) { msc->sample_to_ctime_sample = sample; break; } sample += count; } dprintf("Next Sample for stream #%i is #%li @%li\n", i, msc->current_sample + 1, msc->sample_to_chunk_index + 1); } return 0; } #endif static int mov_read_close(AVFormatContext *s) { int i; MOVContext *mov = (MOVContext *) s->priv_data; for(i=0; itotal_streams; i++) mov_free_stream_context(mov->streams[i]); /* free color tabs */ for(i=0; ictab_size; i++) av_freep(&mov->ctab[i]); av_freep(&mov->ctab); return 0; } static AVInputFormat mov_iformat = { "mov,mp4,m4a,3gp,3g2,mj2", "QuickTime/MPEG4/Motion JPEG 2000 format", sizeof(MOVContext), mov_probe, mov_read_header, mov_read_packet, mov_read_close, #if defined(MOV_SEEK) mov_read_seek, #endif }; int mov_init(void) { av_register_input_format(&mov_iformat); return 0; }