1/* 2 * ISO Media common code 3 * copyright (c) 2001 Fabrice Bellard 4 * copyright (c) 2002 Francois Revol <revol@free.fr> 5 * copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr> 6 * 7 * This file is part of Libav. 8 * 9 * Libav is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; either 12 * version 2.1 of the License, or (at your option) any later version. 13 * 14 * Libav is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with Libav; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 22 */ 23 24#ifndef AVFORMAT_ISOM_H 25#define AVFORMAT_ISOM_H 26 27#include "avio.h" 28#include "internal.h" 29#include "dv.h" 30 31/* isom.c */ 32extern const AVCodecTag ff_mp4_obj_type[]; 33extern const AVCodecTag codec_movvideo_tags[]; 34extern const AVCodecTag codec_movaudio_tags[]; 35extern const AVCodecTag ff_codec_movsubtitle_tags[]; 36 37int ff_mov_iso639_to_lang(const char lang[4], int mp4); 38int ff_mov_lang_to_iso639(unsigned code, char to[4]); 39 40/* the QuickTime file format is quite convoluted... 41 * it has lots of index tables, each indexing something in another one... 42 * Here we just use what is needed to read the chunks 43 */ 44 45typedef struct { 46 int count; 47 int duration; 48} MOVStts; 49 50typedef struct { 51 int first; 52 int count; 53 int id; 54} MOVStsc; 55 56typedef struct { 57 uint32_t type; 58 char *path; 59 char *dir; 60 char volume[28]; 61 char filename[64]; 62 int16_t nlvl_to, nlvl_from; 63} MOVDref; 64 65typedef struct { 66 uint32_t type; 67 int64_t size; /* total size (excluding the size and type fields) */ 68} MOVAtom; 69 70struct MOVParseTableEntry; 71 72typedef struct { 73 unsigned track_id; 74 uint64_t base_data_offset; 75 uint64_t moof_offset; 76 unsigned stsd_id; 77 unsigned duration; 78 unsigned size; 79 unsigned flags; 80} MOVFragment; 81 82typedef struct { 83 unsigned track_id; 84 unsigned stsd_id; 85 unsigned duration; 86 unsigned size; 87 unsigned flags; 88} MOVTrackExt; 89 90typedef struct MOVStreamContext { 91 AVIOContext *pb; 92 int ffindex; ///< AVStream index 93 int next_chunk; 94 unsigned int chunk_count; 95 int64_t *chunk_offsets; 96 unsigned int stts_count; 97 MOVStts *stts_data; 98 unsigned int ctts_count; 99 MOVStts *ctts_data; 100 unsigned int stsc_count; 101 MOVStsc *stsc_data; 102 unsigned int stps_count; 103 unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop 104 int ctts_index; 105 int ctts_sample; 106 unsigned int sample_size; 107 unsigned int sample_count; 108 int *sample_sizes; 109 unsigned int keyframe_count; 110 int *keyframes; 111 int time_scale; 112 int64_t time_offset; ///< time offset of the first edit list entry 113 int current_sample; 114 unsigned int bytes_per_frame; 115 unsigned int samples_per_frame; 116 int dv_audio_container; 117 int pseudo_stream_id; ///< -1 means demux all ids 118 int16_t audio_cid; ///< stsd audio compression id 119 unsigned drefs_count; 120 MOVDref *drefs; 121 int dref_id; 122 int wrong_dts; ///< dts are wrong due to huge ctts offset (iMovie files) 123 int width; ///< tkhd width 124 int height; ///< tkhd height 125 int dts_shift; ///< dts shift when ctts is negative 126 uint32_t palette[256]; 127 int has_palette; 128} MOVStreamContext; 129 130typedef struct MOVContext { 131 AVFormatContext *fc; 132 int time_scale; 133 int64_t duration; ///< duration of the longest track 134 int found_moov; ///< 'moov' atom has been found 135 int found_mdat; ///< 'mdat' atom has been found 136 DVDemuxContext *dv_demux; 137 AVFormatContext *dv_fctx; 138 int isom; ///< 1 if file is ISO Media (mp4/3gp) 139 MOVFragment fragment; ///< current fragment in moof atom 140 MOVTrackExt *trex_data; 141 unsigned trex_count; 142 int itunes_metadata; ///< metadata are itunes style 143 int chapter_track; 144} MOVContext; 145 146int ff_mp4_read_descr_len(AVIOContext *pb); 147int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag); 148int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb); 149void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id); 150 151#define MP4ODescrTag 0x01 152#define MP4IODescrTag 0x02 153#define MP4ESDescrTag 0x03 154#define MP4DecConfigDescrTag 0x04 155#define MP4DecSpecificDescrTag 0x05 156#define MP4SLDescrTag 0x06 157 158int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom); 159enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags); 160 161int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries); 162 163#endif /* AVFORMAT_ISOM_H */ 164