/* * 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 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 */