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>
7 * This file is part of FFmpeg.
9 * FFmpeg 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.
14 * FFmpeg 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.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #ifndef AVFORMAT_ISOM_H
25 #define AVFORMAT_ISOM_H
32 extern const AVCodecTag ff_mp4_obj_type[];
33 extern const AVCodecTag codec_movvideo_tags[];
34 extern const AVCodecTag codec_movaudio_tags[];
35 extern const AVCodecTag ff_codec_movsubtitle_tags[];
37 int ff_mov_iso639_to_lang(const char lang[4], int mp4);
38 int ff_mov_lang_to_iso639(unsigned code, char to[4]);
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
62 int16_t nlvl_to, nlvl_from;
67 int64_t size; /* total size (excluding the size and type fields) */
70 struct MOVParseTableEntry;
74 uint64_t base_data_offset;
90 typedef struct MOVStreamContext {
92 int ffindex; ///< AVStream index
94 unsigned int chunk_count;
95 int64_t *chunk_offsets;
96 unsigned int stts_count;
98 unsigned int ctts_count;
100 unsigned int stsc_count;
102 unsigned int stps_count;
103 unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop
106 unsigned int sample_size;
107 unsigned int sample_count;
109 unsigned int keyframe_count;
112 int64_t time_offset; ///< time offset of the first edit list entry
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;
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];
130 typedef struct MOVContext {
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;
142 int itunes_metadata; ///< metadata are itunes style
146 int ff_mp4_read_descr_len(AVIOContext *pb);
147 int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);
148 int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);
150 #define MP4IODescrTag 0x02
151 #define MP4ESDescrTag 0x03
152 #define MP4DecConfigDescrTag 0x04
153 #define MP4DecSpecificDescrTag 0x05
155 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom);
156 enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
158 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
159 void ff_mov_read_chan(AVFormatContext *s, int64_t size, AVCodecContext *codec);
160 void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
162 #endif /* AVFORMAT_ISOM_H */