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 ff_codec_movvideo_tags[];
34 extern const AVCodecTag ff_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; ///< may contain value calculated from stsd or value from stsz atom
107 unsigned int alt_sample_size; ///< always contains sample size from stsz atom
108 unsigned int sample_count;
111 unsigned int keyframe_count;
114 int64_t empty_duration; ///< empty duration of the first edit list entry
115 int64_t start_time; ///< start time of the media
116 int64_t time_offset; ///< time offset of the edit list entries
118 unsigned int bytes_per_frame;
119 unsigned int samples_per_frame;
120 int dv_audio_container;
121 int pseudo_stream_id; ///< -1 means demux all ids
122 int16_t audio_cid; ///< stsd audio compression id
123 unsigned drefs_count;
127 unsigned trefs_count;
129 int wrong_dts; ///< dts are wrong due to huge ctts offset (iMovie files)
130 int width; ///< tkhd width
131 int height; ///< tkhd height
132 int dts_shift; ///< dts shift when ctts is negative
133 uint32_t palette[256];
136 uint32_t tmcd_flags; ///< tmcd track flags
137 int64_t track_end; ///< used for dts generation in fragmented movie files
140 typedef struct MOVContext {
144 int64_t duration; ///< duration of the longest track
145 int found_moov; ///< 'moov' atom has been found
146 int found_mdat; ///< 'mdat' atom has been found
147 DVDemuxContext *dv_demux;
148 AVFormatContext *dv_fctx;
149 int isom; ///< 1 if file is ISO Media (mp4/3gp)
150 MOVFragment fragment; ///< current fragment in moof atom
151 MOVTrackExt *trex_data;
153 int itunes_metadata; ///< metadata are itunes style
155 int use_absolute_path;
156 int64_t next_root_atom; ///< offset of the next root atom
159 int ff_mp4_read_descr_len(AVIOContext *pb);
160 int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);
161 int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);
162 void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
164 #define MP4ODescrTag 0x01
165 #define MP4IODescrTag 0x02
166 #define MP4ESDescrTag 0x03
167 #define MP4DecConfigDescrTag 0x04
168 #define MP4DecSpecificDescrTag 0x05
169 #define MP4SLDescrTag 0x06
171 #define MOV_TFHD_BASE_DATA_OFFSET 0x01
172 #define MOV_TFHD_STSD_ID 0x02
173 #define MOV_TFHD_DEFAULT_DURATION 0x08
174 #define MOV_TFHD_DEFAULT_SIZE 0x10
175 #define MOV_TFHD_DEFAULT_FLAGS 0x20
176 #define MOV_TFHD_DURATION_IS_EMPTY 0x010000
178 #define MOV_TRUN_DATA_OFFSET 0x01
179 #define MOV_TRUN_FIRST_SAMPLE_FLAGS 0x04
180 #define MOV_TRUN_SAMPLE_DURATION 0x100
181 #define MOV_TRUN_SAMPLE_SIZE 0x200
182 #define MOV_TRUN_SAMPLE_FLAGS 0x400
183 #define MOV_TRUN_SAMPLE_CTS 0x800
185 #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
186 #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC 0x00010000
187 #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK 0x000e0000
188 #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK 0x00300000
189 #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK 0x00c00000
190 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK 0x03000000
192 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO 0x02000000
193 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES 0x01000000
195 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom);
196 enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
198 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
199 void ff_mov_read_chan(AVFormatContext *s, int64_t size, AVCodecContext *codec);
200 void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
202 #endif /* AVFORMAT_ISOM_H */