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Diffstat (limited to 'ffmpeg/libavformat/isom.h')
| -rw-r--r-- | ffmpeg/libavformat/isom.h | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/ffmpeg/libavformat/isom.h b/ffmpeg/libavformat/isom.h new file mode 100644 index 0000000..4154baf --- /dev/null +++ b/ffmpeg/libavformat/isom.h @@ -0,0 +1,209 @@ +/* + * ISO Media common code + * copyright (c) 2001 Fabrice Bellard + * copyright (c) 2002 Francois Revol <revol@free.fr> + * copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVFORMAT_ISOM_H +#define AVFORMAT_ISOM_H + +#include "avio.h" +#include "internal.h" +#include "dv.h" + +/* isom.c */ +extern const AVCodecTag ff_mp4_obj_type[]; +extern const AVCodecTag ff_codec_movvideo_tags[]; +extern const AVCodecTag ff_codec_movaudio_tags[]; +extern const AVCodecTag ff_codec_movsubtitle_tags[]; + +int ff_mov_iso639_to_lang(const char lang[4], int mp4); +int ff_mov_lang_to_iso639(unsigned code, char to[4]); + +/* the QuickTime file format is quite convoluted... + * it has lots of index tables, each indexing something in another one... + * Here we just use what is needed to read the chunks + */ + +typedef struct MOVStts { + int count; + int duration; +} MOVStts; + +typedef struct MOVStsc { + int first; + int count; + int id; +} MOVStsc; + +typedef struct MOVDref { + uint32_t type; + char *path; + char *dir; + char volume[28]; + char filename[64]; + int16_t nlvl_to, nlvl_from; +} MOVDref; + +typedef struct MOVAtom { + uint32_t type; + int64_t size; /* total size (excluding the size and type fields) */ +} MOVAtom; + +struct MOVParseTableEntry; + +typedef struct MOVFragment { + unsigned track_id; + uint64_t base_data_offset; + uint64_t moof_offset; + unsigned stsd_id; + unsigned duration; + unsigned size; + unsigned flags; +} MOVFragment; + +typedef struct MOVTrackExt { + unsigned track_id; + unsigned stsd_id; + unsigned duration; + unsigned size; + unsigned flags; +} MOVTrackExt; + +typedef struct MOVSbgp { + unsigned int count; + unsigned int index; +} MOVSbgp; + +typedef struct MOVStreamContext { + AVIOContext *pb; + int pb_is_copied; + int ffindex; ///< AVStream index + int next_chunk; + unsigned int chunk_count; + int64_t *chunk_offsets; + unsigned int stts_count; + MOVStts *stts_data; + unsigned int ctts_count; + MOVStts *ctts_data; + unsigned int stsc_count; + MOVStsc *stsc_data; + unsigned int stps_count; + unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop + int ctts_index; + int ctts_sample; + unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom + unsigned int alt_sample_size; ///< always contains sample size from stsz atom + unsigned int sample_count; + int *sample_sizes; + int keyframe_absent; + unsigned int keyframe_count; + int *keyframes; + int time_scale; + int64_t empty_duration; ///< empty duration of the first edit list entry + int64_t start_time; ///< start time of the media + int64_t time_offset; ///< time offset of the edit list entries + int current_sample; + unsigned int bytes_per_frame; + unsigned int samples_per_frame; + int dv_audio_container; + int pseudo_stream_id; ///< -1 means demux all ids + int16_t audio_cid; ///< stsd audio compression id + unsigned drefs_count; + MOVDref *drefs; + int dref_id; + int timecode_track; + int wrong_dts; ///< dts are wrong due to huge ctts offset (iMovie files) + int width; ///< tkhd width + int height; ///< tkhd height + int dts_shift; ///< dts shift when ctts is negative + uint32_t palette[256]; + int has_palette; + int64_t data_size; + uint32_t tmcd_flags; ///< tmcd track flags + int64_t track_end; ///< used for dts generation in fragmented movie files + int start_pad; ///< amount of samples to skip due to enc-dec delay + unsigned int rap_group_count; + MOVSbgp *rap_group; +} MOVStreamContext; + +typedef struct MOVContext { + AVClass *avclass; + AVFormatContext *fc; + int time_scale; + int64_t duration; ///< duration of the longest track + int found_moov; ///< 'moov' atom has been found + int found_mdat; ///< 'mdat' atom has been found + DVDemuxContext *dv_demux; + AVFormatContext *dv_fctx; + int isom; ///< 1 if file is ISO Media (mp4/3gp) + MOVFragment fragment; ///< current fragment in moof atom + MOVTrackExt *trex_data; + unsigned trex_count; + int itunes_metadata; ///< metadata are itunes style + int chapter_track; + int use_absolute_path; + int ignore_editlist; + int64_t next_root_atom; ///< offset of the next root atom +} MOVContext; + +int ff_mp4_read_descr_len(AVIOContext *pb); +int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag); +int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb); +void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id); + +#define MP4ODescrTag 0x01 +#define MP4IODescrTag 0x02 +#define MP4ESDescrTag 0x03 +#define MP4DecConfigDescrTag 0x04 +#define MP4DecSpecificDescrTag 0x05 +#define MP4SLDescrTag 0x06 + +#define MOV_TFHD_BASE_DATA_OFFSET 0x01 +#define MOV_TFHD_STSD_ID 0x02 +#define MOV_TFHD_DEFAULT_DURATION 0x08 +#define MOV_TFHD_DEFAULT_SIZE 0x10 +#define MOV_TFHD_DEFAULT_FLAGS 0x20 +#define MOV_TFHD_DURATION_IS_EMPTY 0x010000 + +#define MOV_TRUN_DATA_OFFSET 0x01 +#define MOV_TRUN_FIRST_SAMPLE_FLAGS 0x04 +#define MOV_TRUN_SAMPLE_DURATION 0x100 +#define MOV_TRUN_SAMPLE_SIZE 0x200 +#define MOV_TRUN_SAMPLE_FLAGS 0x400 +#define MOV_TRUN_SAMPLE_CTS 0x800 + +#define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff +#define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC 0x00010000 +#define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK 0x000e0000 +#define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK 0x00300000 +#define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK 0x00c00000 +#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK 0x03000000 + +#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO 0x02000000 +#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES 0x01000000 + +int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom); +enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags); + +int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries); +void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout); + +#endif /* AVFORMAT_ISOM_H */ |