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 Libav.
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.
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.
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
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;
107 unsigned int sample_count;
110 unsigned int keyframe_count;
113 int64_t time_offset; ///< time offset of the first edit list entry
115 unsigned int bytes_per_frame;
116 unsigned int samples_per_frame;
117 int dv_audio_container;
118 int pseudo_stream_id; ///< -1 means demux all ids
119 int16_t audio_cid; ///< stsd audio compression id
120 unsigned drefs_count;
123 int wrong_dts; ///< dts are wrong due to huge ctts offset (iMovie files)
124 int width; ///< tkhd width
125 int height; ///< tkhd height
126 int dts_shift; ///< dts shift when ctts is negative
127 uint32_t palette[256];
130 int64_t track_end; ///< used for dts generation in fragmented movie files
133 typedef struct MOVContext {
136 int64_t duration; ///< duration of the longest track
137 int found_moov; ///< 'moov' atom has been found
138 int found_mdat; ///< 'mdat' atom has been found
139 DVDemuxContext *dv_demux;
140 AVFormatContext *dv_fctx;
141 int isom; ///< 1 if file is ISO Media (mp4/3gp)
142 MOVFragment fragment; ///< current fragment in moof atom
143 MOVTrackExt *trex_data;
145 int itunes_metadata; ///< metadata are itunes style
147 int64_t next_root_atom; ///< offset of the next root atom
150 int ff_mp4_read_descr_len(AVIOContext *pb);
151 int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);
152 int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);
153 void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
155 #define MP4ODescrTag 0x01
156 #define MP4IODescrTag 0x02
157 #define MP4ESDescrTag 0x03
158 #define MP4DecConfigDescrTag 0x04
159 #define MP4DecSpecificDescrTag 0x05
160 #define MP4SLDescrTag 0x06
162 #define MOV_TFHD_BASE_DATA_OFFSET 0x01
163 #define MOV_TFHD_STSD_ID 0x02
164 #define MOV_TFHD_DEFAULT_DURATION 0x08
165 #define MOV_TFHD_DEFAULT_SIZE 0x10
166 #define MOV_TFHD_DEFAULT_FLAGS 0x20
167 #define MOV_TFHD_DURATION_IS_EMPTY 0x010000
169 #define MOV_TRUN_DATA_OFFSET 0x01
170 #define MOV_TRUN_FIRST_SAMPLE_FLAGS 0x04
171 #define MOV_TRUN_SAMPLE_DURATION 0x100
172 #define MOV_TRUN_SAMPLE_SIZE 0x200
173 #define MOV_TRUN_SAMPLE_FLAGS 0x400
174 #define MOV_TRUN_SAMPLE_CTS 0x800
176 #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
177 #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC 0x00010000
178 #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK 0x000e0000
179 #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK 0x00300000
180 #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK 0x00c00000
181 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK 0x03000000
183 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO 0x02000000
184 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES 0x01000000
186 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom);
187 enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
189 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
191 #endif /* AVFORMAT_ISOM_H */