PeerStreamer

/*

 * 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 Libav.

 *

 * Libav 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.

 *

 * Libav 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 Libav; 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 codec_movvideo_tags[];

extern const AVCodecTag 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 {

    int count;

    int duration;

} MOVStts;

typedef struct {

    int first;

    int count;

    int id;

} MOVStsc;

typedef struct {

    uint32_t type;

    char *path;

    char *dir;

    char volume[28];

    char filename[64];

    int16_t nlvl_to, nlvl_from;

} MOVDref;

typedef struct {

    uint32_t type;

    int64_t size; /* total size (excluding the size and type fields) */

} MOVAtom;

struct MOVParseTableEntry;

typedef struct {

    unsigned track_id;

    uint64_t base_data_offset;

    uint64_t moof_offset;

    unsigned stsd_id;

    unsigned duration;

    unsigned size;

    unsigned flags;

} MOVFragment;

typedef struct {

    unsigned track_id;

    unsigned stsd_id;

    unsigned duration;

    unsigned size;

    unsigned flags;

} MOVTrackExt;

typedef struct MOVStreamContext {

    AVIOContext *pb;

    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;

    unsigned int sample_count;

    int *sample_sizes;

    unsigned int keyframe_count;

    int *keyframes;

    int time_scale;

    int time_offset;      ///< time offset of the first edit list entry

    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 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

} MOVStreamContext;

typedef struct MOVContext {

    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;

} 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);

#define MP4IODescrTag                   0x02

#define MP4ESDescrTag                   0x03

#define MP4DecConfigDescrTag            0x04

#define MP4DecSpecificDescrTag          0x05

int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom);

enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags);

int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);

#endif /* AVFORMAT_ISOM_H */