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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 FFmpeg.
8 *
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.
13 *
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.
18 *
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
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 ff_codec_movvideo_tags[];
34extern const AVCodecTag ff_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 MOVStts {
46 int count;
47 int duration;
48} MOVStts;
49
50typedef struct MOVStsc {
51 int first;
52 int count;
53 int id;
54} MOVStsc;
55
56typedef struct MOVDref {
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 MOVAtom {
66 uint32_t type;
67 int64_t size; /* total size (excluding the size and type fields) */
68} MOVAtom;
69
70struct MOVParseTableEntry;
71
72typedef struct MOVFragment {
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 MOVTrackExt {
83 unsigned track_id;
84 unsigned stsd_id;
85 unsigned duration;
86 unsigned size;
87 unsigned flags;
88} MOVTrackExt;
89
90typedef struct MOVSbgp {
91 unsigned int count;
92 unsigned int index;
93} MOVSbgp;
94
95typedef struct MOVStreamContext {
96 AVIOContext *pb;
97 int pb_is_copied;
98 int ffindex; ///< AVStream index
99 int next_chunk;
100 unsigned int chunk_count;
101 int64_t *chunk_offsets;
102 unsigned int stts_count;
103 MOVStts *stts_data;
104 unsigned int ctts_count;
105 MOVStts *ctts_data;
106 unsigned int stsc_count;
107 MOVStsc *stsc_data;
108 unsigned int stps_count;
109 unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop
110 int ctts_index;
111 int ctts_sample;
112 unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom
113 unsigned int stsz_sample_size; ///< always contains sample size from stsz atom
114 unsigned int sample_count;
115 int *sample_sizes;
116 int keyframe_absent;
117 unsigned int keyframe_count;
118 int *keyframes;
119 int time_scale;
120 int64_t empty_duration; ///< empty duration of the first edit list entry
121 int64_t start_time; ///< start time of the media
122 int64_t time_offset; ///< time offset of the edit list entries
123 int current_sample;
124 unsigned int bytes_per_frame;
125 unsigned int samples_per_frame;
126 int dv_audio_container;
127 int pseudo_stream_id; ///< -1 means demux all ids
128 int16_t audio_cid; ///< stsd audio compression id
129 unsigned drefs_count;
130 MOVDref *drefs;
131 int dref_id;
132 int timecode_track;
133 int wrong_dts; ///< dts are wrong due to huge ctts offset (iMovie files)
134 int width; ///< tkhd width
135 int height; ///< tkhd height
136 int dts_shift; ///< dts shift when ctts is negative
137 uint32_t palette[256];
138 int has_palette;
139 int64_t data_size;
140 uint32_t tmcd_flags; ///< tmcd track flags
141 int64_t track_end; ///< used for dts generation in fragmented movie files
142 int start_pad; ///< amount of samples to skip due to enc-dec delay
143 unsigned int rap_group_count;
144 MOVSbgp *rap_group;
145} MOVStreamContext;
146
147typedef struct MOVContext {
148 AVClass *avclass;
149 AVFormatContext *fc;
150 int time_scale;
151 int64_t duration; ///< duration of the longest track
152 int found_moov; ///< 'moov' atom has been found
153 int found_mdat; ///< 'mdat' atom has been found
154 DVDemuxContext *dv_demux;
155 AVFormatContext *dv_fctx;
156 int isom; ///< 1 if file is ISO Media (mp4/3gp)
157 MOVFragment fragment; ///< current fragment in moof atom
158 MOVTrackExt *trex_data;
159 unsigned trex_count;
160 int itunes_metadata; ///< metadata are itunes style
161 int chapter_track;
162 int use_absolute_path;
163 int ignore_editlist;
164 int64_t next_root_atom; ///< offset of the next root atom
165 int *bitrates; ///< bitrates read before streams creation
166 int bitrates_count;
167} MOVContext;
168
169int ff_mp4_read_descr_len(AVIOContext *pb);
170int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);
171int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);
172void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
173
174#define MP4ODescrTag 0x01
175#define MP4IODescrTag 0x02
176#define MP4ESDescrTag 0x03
177#define MP4DecConfigDescrTag 0x04
178#define MP4DecSpecificDescrTag 0x05
179#define MP4SLDescrTag 0x06
180
181#define MOV_TFHD_BASE_DATA_OFFSET 0x01
182#define MOV_TFHD_STSD_ID 0x02
183#define MOV_TFHD_DEFAULT_DURATION 0x08
184#define MOV_TFHD_DEFAULT_SIZE 0x10
185#define MOV_TFHD_DEFAULT_FLAGS 0x20
186#define MOV_TFHD_DURATION_IS_EMPTY 0x010000
187
188#define MOV_TRUN_DATA_OFFSET 0x01
189#define MOV_TRUN_FIRST_SAMPLE_FLAGS 0x04
190#define MOV_TRUN_SAMPLE_DURATION 0x100
191#define MOV_TRUN_SAMPLE_SIZE 0x200
192#define MOV_TRUN_SAMPLE_FLAGS 0x400
193#define MOV_TRUN_SAMPLE_CTS 0x800
194
195#define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
196#define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC 0x00010000
197#define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK 0x000e0000
198#define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK 0x00300000
199#define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK 0x00c00000
200#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK 0x03000000
201
202#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO 0x02000000
203#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES 0x01000000
204
205#define MOV_TKHD_FLAG_ENABLED 0x0001
206#define MOV_TKHD_FLAG_IN_MOVIE 0x0002
207#define MOV_TKHD_FLAG_IN_PREVIEW 0x0004
208#define MOV_TKHD_FLAG_IN_POSTER 0x0008
209
210int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom);
211enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
212
213int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
214void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
215
216#endif /* AVFORMAT_ISOM_H */
217
generated by cgit at 2024-05-17 06:10:48 (GMT)