mirror of
https://github.com/FFmpeg/FFmpeg.git
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a8d9da4c8b
For badly interleaved files, interleave packets from multiple tracks at the demuxer level can trigger seeking back and forth, which can be dramatically slow depending on the protocol. Demuxer level interleave can be useless sometimes, e.g., reading mp4 via http and then transcoding/remux to DASH. Disable this option when you don't need the demuxer level interleave, and want to avoid the IO penalizes. Co-authored-by: Derek Buitenhuis <derek.buitenhuis@gmail.com> Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
438 lines
13 KiB
C
438 lines
13 KiB
C
/*
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* ISO Media common code
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* copyright (c) 2001 Fabrice Bellard
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* copyright (c) 2002 Francois Revol <revol@free.fr>
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* copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVFORMAT_ISOM_H
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#define AVFORMAT_ISOM_H
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#include <stddef.h>
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#include <stdint.h>
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#include "libavutil/encryption_info.h"
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#include "libavutil/mastering_display_metadata.h"
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#include "libavutil/spherical.h"
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#include "libavutil/stereo3d.h"
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#include "avio.h"
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#include "internal.h"
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#include "dv.h"
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/* isom.c */
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extern const AVCodecTag ff_mp4_obj_type[];
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extern const AVCodecTag ff_codec_movvideo_tags[];
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extern const AVCodecTag ff_codec_movaudio_tags[];
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extern const AVCodecTag ff_codec_movsubtitle_tags[];
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extern const AVCodecTag ff_codec_movdata_tags[];
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int ff_mov_iso639_to_lang(const char lang[4], int mp4);
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int ff_mov_lang_to_iso639(unsigned code, char to[4]);
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struct AVAESCTR;
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/* the QuickTime file format is quite convoluted...
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* it has lots of index tables, each indexing something in another one...
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* Here we just use what is needed to read the chunks
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*/
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typedef struct MOVStts {
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unsigned int count;
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unsigned int duration;
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} MOVStts;
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typedef struct MOVCtts {
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unsigned int count;
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int duration;
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} MOVCtts;
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typedef struct MOVStsc {
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int first;
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int count;
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int id;
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} MOVStsc;
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typedef struct MOVElst {
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int64_t duration;
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int64_t time;
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float rate;
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} MOVElst;
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typedef struct MOVDref {
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uint32_t type;
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char *path;
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char *dir;
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char volume[28];
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char filename[64];
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int16_t nlvl_to, nlvl_from;
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} MOVDref;
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typedef struct MOVAtom {
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uint32_t type;
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int64_t size; /* total size (excluding the size and type fields) */
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} MOVAtom;
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struct MOVParseTableEntry;
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typedef struct MOVFragment {
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int found_tfhd;
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unsigned track_id;
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uint64_t base_data_offset;
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uint64_t moof_offset;
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uint64_t implicit_offset;
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unsigned stsd_id;
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unsigned duration;
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unsigned size;
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unsigned flags;
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} MOVFragment;
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typedef struct MOVTrackExt {
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unsigned track_id;
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unsigned stsd_id;
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unsigned duration;
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unsigned size;
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unsigned flags;
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} MOVTrackExt;
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typedef struct MOVSbgp {
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unsigned int count;
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unsigned int index;
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} MOVSbgp;
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typedef struct MOVEncryptionIndex {
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// Individual encrypted samples. If there are no elements, then the default
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// settings will be used.
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unsigned int nb_encrypted_samples;
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AVEncryptionInfo **encrypted_samples;
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uint8_t* auxiliary_info_sizes;
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size_t auxiliary_info_sample_count;
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uint8_t auxiliary_info_default_size;
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uint64_t* auxiliary_offsets; ///< Absolute seek position
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size_t auxiliary_offsets_count;
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} MOVEncryptionIndex;
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typedef struct MOVFragmentStreamInfo {
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int id;
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int64_t sidx_pts;
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int64_t first_tfra_pts;
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int64_t tfdt_dts;
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int64_t next_trun_dts;
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// Index of the first sample/trun in the fragment.
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int index_base;
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int index_entry;
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MOVEncryptionIndex *encryption_index;
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int stsd_id; // current fragment stsd_id
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} MOVFragmentStreamInfo;
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typedef struct MOVFragmentIndexItem {
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int64_t moof_offset;
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int headers_read;
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int current;
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int nb_stream_info;
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MOVFragmentStreamInfo * stream_info;
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} MOVFragmentIndexItem;
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typedef struct MOVFragmentIndex {
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int allocated_size;
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int complete;
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int current;
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int nb_items;
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MOVFragmentIndexItem * item;
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} MOVFragmentIndex;
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typedef struct MOVIndexRange {
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int64_t start;
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int64_t end;
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} MOVIndexRange;
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typedef struct MOVStreamContext {
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AVIOContext *pb;
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int pb_is_copied;
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int ffindex; ///< AVStream index
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int next_chunk;
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unsigned int chunk_count;
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int64_t *chunk_offsets;
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unsigned int stts_count;
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MOVStts *stts_data;
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unsigned int sdtp_count;
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uint8_t *sdtp_data;
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unsigned int ctts_count;
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unsigned int ctts_allocated_size;
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MOVCtts *ctts_data;
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unsigned int stsc_count;
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MOVStsc *stsc_data;
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unsigned int stsc_index;
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int stsc_sample;
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unsigned int stps_count;
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unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop
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MOVElst *elst_data;
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unsigned int elst_count;
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int ctts_index;
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int ctts_sample;
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unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom
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unsigned int stsz_sample_size; ///< always contains sample size from stsz atom
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unsigned int sample_count;
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int *sample_sizes;
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int keyframe_absent;
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unsigned int keyframe_count;
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int *keyframes;
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int time_scale;
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int64_t time_offset; ///< time offset of the edit list entries
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int64_t min_corrected_pts; ///< minimum Composition time shown by the edits excluding empty edits.
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int current_sample;
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int64_t current_index;
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MOVIndexRange* index_ranges;
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MOVIndexRange* current_index_range;
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unsigned int bytes_per_frame;
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unsigned int samples_per_frame;
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int dv_audio_container;
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int pseudo_stream_id; ///< -1 means demux all ids
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int16_t audio_cid; ///< stsd audio compression id
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unsigned drefs_count;
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MOVDref *drefs;
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int dref_id;
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int timecode_track;
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int width; ///< tkhd width
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int height; ///< tkhd height
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int dts_shift; ///< dts shift when ctts is negative
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uint32_t palette[256];
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int has_palette;
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int64_t data_size;
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uint32_t tmcd_flags; ///< tmcd track flags
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uint8_t tmcd_nb_frames; ///< tmcd number of frames per tick / second
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int64_t track_end; ///< used for dts generation in fragmented movie files
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int start_pad; ///< amount of samples to skip due to enc-dec delay
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unsigned int rap_group_count;
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MOVSbgp *rap_group;
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unsigned int sync_group_count;
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MOVSbgp *sync_group;
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uint8_t *sgpd_sync;
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uint32_t sgpd_sync_count;
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int32_t *sample_offsets;
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int sample_offsets_count;
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int *open_key_samples;
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int open_key_samples_count;
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uint32_t min_sample_duration;
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int nb_frames_for_fps;
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int64_t duration_for_fps;
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/** extradata array (and size) for multiple stsd */
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uint8_t **extradata;
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int *extradata_size;
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int last_stsd_index;
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int stsd_count;
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int stsd_version;
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int32_t *display_matrix;
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AVStereo3D *stereo3d;
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AVSphericalMapping *spherical;
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size_t spherical_size;
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AVMasteringDisplayMetadata *mastering;
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AVContentLightMetadata *coll;
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size_t coll_size;
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uint32_t format;
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int has_sidx; // If there is an sidx entry for this stream.
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struct {
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struct AVAESCTR* aes_ctr;
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struct AVAES *aes_ctx;
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unsigned int per_sample_iv_size; // Either 0, 8, or 16.
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AVEncryptionInfo *default_encrypted_sample;
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MOVEncryptionIndex *encryption_index;
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} cenc;
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} MOVStreamContext;
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typedef struct MOVContext {
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const AVClass *class; ///< class for private options
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AVFormatContext *fc;
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int time_scale;
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int64_t duration; ///< duration of the longest track
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int found_moov; ///< 'moov' atom has been found
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int found_mdat; ///< 'mdat' atom has been found
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int found_hdlr_mdta; ///< 'hdlr' atom with type 'mdta' has been found
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int trak_index; ///< Index of the current 'trak'
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char **meta_keys;
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unsigned meta_keys_count;
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DVDemuxContext *dv_demux;
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AVFormatContext *dv_fctx;
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int isom; ///< 1 if file is ISO Media (mp4/3gp)
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MOVFragment fragment; ///< current fragment in moof atom
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MOVTrackExt *trex_data;
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unsigned trex_count;
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int itunes_metadata; ///< metadata are itunes style
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int handbrake_version;
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int *chapter_tracks;
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unsigned int nb_chapter_tracks;
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int use_absolute_path;
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int ignore_editlist;
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int advanced_editlist;
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int advanced_editlist_autodisabled;
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int ignore_chapters;
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int seek_individually;
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int64_t next_root_atom; ///< offset of the next root atom
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int export_all;
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int export_xmp;
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int *bitrates; ///< bitrates read before streams creation
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int bitrates_count;
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int moov_retry;
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int use_mfra_for;
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int has_looked_for_mfra;
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int use_tfdt;
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MOVFragmentIndex frag_index;
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int atom_depth;
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unsigned int aax_mode; ///< 'aax' file has been detected
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uint8_t file_key[20];
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uint8_t file_iv[20];
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void *activation_bytes;
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int activation_bytes_size;
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void *audible_fixed_key;
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int audible_fixed_key_size;
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void *audible_key;
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int audible_key_size;
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void *audible_iv;
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int audible_iv_size;
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struct AVAES *aes_decrypt;
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uint8_t *decryption_key;
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int decryption_key_len;
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int enable_drefs;
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int32_t movie_display_matrix[3][3]; ///< display matrix from mvhd
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int have_read_mfra_size;
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uint32_t mfra_size;
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uint32_t max_stts_delta;
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int is_still_picture_avif;
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int primary_item_id;
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struct {
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int item_id;
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int extent_length;
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int64_t extent_offset;
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} *avif_info;
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int avif_info_size;
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int interleaved_read;
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} MOVContext;
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int ff_mp4_read_descr_len(AVIOContext *pb);
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int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);
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int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);
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void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
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#define MP4ODescrTag 0x01
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#define MP4IODescrTag 0x02
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#define MP4ESDescrTag 0x03
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#define MP4DecConfigDescrTag 0x04
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#define MP4DecSpecificDescrTag 0x05
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#define MP4SLDescrTag 0x06
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#define MOV_TFHD_BASE_DATA_OFFSET 0x01
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#define MOV_TFHD_STSD_ID 0x02
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#define MOV_TFHD_DEFAULT_DURATION 0x08
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#define MOV_TFHD_DEFAULT_SIZE 0x10
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#define MOV_TFHD_DEFAULT_FLAGS 0x20
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#define MOV_TFHD_DURATION_IS_EMPTY 0x010000
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#define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000
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#define MOV_TRUN_DATA_OFFSET 0x01
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#define MOV_TRUN_FIRST_SAMPLE_FLAGS 0x04
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#define MOV_TRUN_SAMPLE_DURATION 0x100
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#define MOV_TRUN_SAMPLE_SIZE 0x200
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#define MOV_TRUN_SAMPLE_FLAGS 0x400
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#define MOV_TRUN_SAMPLE_CTS 0x800
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#define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
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#define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC 0x00010000
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#define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK 0x000e0000
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#define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK 0x00300000
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#define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK 0x00c00000
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#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK 0x03000000
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#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO 0x02000000
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#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES 0x01000000
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#define MOV_TKHD_FLAG_ENABLED 0x0001
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#define MOV_TKHD_FLAG_IN_MOVIE 0x0002
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#define MOV_TKHD_FLAG_IN_PREVIEW 0x0004
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#define MOV_TKHD_FLAG_IN_POSTER 0x0008
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#define MOV_SAMPLE_DEPENDENCY_UNKNOWN 0x0
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#define MOV_SAMPLE_DEPENDENCY_YES 0x1
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#define MOV_SAMPLE_DEPENDENCY_NO 0x2
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#define TAG_IS_AVCI(tag) \
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((tag) == MKTAG('a', 'i', '5', 'p') || \
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(tag) == MKTAG('a', 'i', '5', 'q') || \
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(tag) == MKTAG('a', 'i', '5', '2') || \
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(tag) == MKTAG('a', 'i', '5', '3') || \
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(tag) == MKTAG('a', 'i', '5', '5') || \
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(tag) == MKTAG('a', 'i', '5', '6') || \
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(tag) == MKTAG('a', 'i', '1', 'p') || \
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(tag) == MKTAG('a', 'i', '1', 'q') || \
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(tag) == MKTAG('a', 'i', '1', '2') || \
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(tag) == MKTAG('a', 'i', '1', '3') || \
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(tag) == MKTAG('a', 'i', '1', '5') || \
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(tag) == MKTAG('a', 'i', '1', '6') || \
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(tag) == MKTAG('a', 'i', 'v', 'x') || \
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(tag) == MKTAG('A', 'V', 'i', 'n'))
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int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb);
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int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
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void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
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#define FF_MOV_FLAG_MFRA_AUTO -1
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#define FF_MOV_FLAG_MFRA_DTS 1
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#define FF_MOV_FLAG_MFRA_PTS 2
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/**
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* Compute codec id for 'lpcm' tag.
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* See CoreAudioTypes and AudioStreamBasicDescription at Apple.
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*/
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static inline enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
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{
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/* lpcm flags:
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* 0x1 = float
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* 0x2 = big-endian
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* 0x4 = signed
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*/
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return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
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}
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#define MOV_ISMV_TTML_TAG MKTAG('d', 'f', 'x', 'p')
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#define MOV_MP4_TTML_TAG MKTAG('s', 't', 'p', 'p')
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#define MOV_MP4_FPCM_TAG MKTAG('f', 'p', 'c', 'm')
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#define MOV_MP4_IPCM_TAG MKTAG('i', 'p', 'c', 'm')
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struct MP4TrackKindValueMapping {
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int disposition;
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const char *value;
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};
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struct MP4TrackKindMapping {
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const char *scheme_uri;
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const struct MP4TrackKindValueMapping *value_maps;
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};
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extern const struct MP4TrackKindMapping ff_mov_track_kind_table[];
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#endif /* AVFORMAT_ISOM_H */
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