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ffmpeg/libavformat/movenc.h
Martin Storsjö 6ec22731ae movenc: Add an option for resilient, hybrid fragmented/non-fragmented muxing 
This allows ending up with a normal, non-fragmented file when
the file is finished, while keeping the file readable if writing
is aborted abruptly at any point. (Normally when writing a
mov/mp4 file, the unfinished file is completely useless unless it
is finished properly.)

This results in a file where the mdat atom contains (and hides)
all the moof atoms that were part of the fragmented file structure
initially.

Signed-off-by: Martin Storsjö <martin@martin.st>
2024-06-24 11:24:04 +03:00

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/*
* MOV, 3GP, MP4 muxer
* Copyright (c) 2003 Thomas Raivio
* Copyright (c) 2004 Gildas Bazin <gbazin at videolan dot org>
* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
*
* 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_MOVENC_H
#define AVFORMAT_MOVENC_H
#include "avformat.h"
#include "movenccenc.h"
#include "libavcodec/packet_internal.h"
#define MOV_FRAG_INFO_ALLOC_INCREMENT 64
#define MOV_INDEX_CLUSTER_SIZE 1024
#define MOV_TIMESCALE 1000
#define RTP_MAX_PACKET_SIZE 1450
#define MODE_MP4 0x01
#define MODE_MOV 0x02
#define MODE_3GP 0x04
#define MODE_PSP 0x08 // example working PSP command line:
// ffmpeg -i testinput.avi -f psp -r 14.985 -s 320x240 -b 768 -ar 24000 -ab 32 M4V00001.MP4
#define MODE_3G2 0x10
#define MODE_IPOD 0x20
#define MODE_ISM 0x40
#define MODE_F4V 0x80
#define MODE_AVIF 0x100
typedef struct MOVIentry {
uint64_t pos;
int64_t dts;
int64_t pts;
unsigned int size;
unsigned int samples_in_chunk;
unsigned int chunkNum; ///< Chunk number if the current entry is a chunk start otherwise 0
unsigned int entries;
int cts;
#define MOV_SYNC_SAMPLE 0x0001
#define MOV_PARTIAL_SYNC_SAMPLE 0x0002
#define MOV_DISPOSABLE_SAMPLE 0x0004
uint32_t flags;
AVProducerReferenceTime prft;
} MOVIentry;
typedef struct HintSample {
const uint8_t *data;
int size;
int sample_number;
int offset;
int own_data;
} HintSample;
typedef struct HintSampleQueue {
int size;
int len;
HintSample *samples;
} HintSampleQueue;
typedef struct MOVFragmentInfo {
int64_t offset;
int64_t time;
int64_t duration;
int64_t tfrf_offset;
int size;
} MOVFragmentInfo;
typedef struct MOVTrack {
int mode;
int entry, entry_written;
unsigned timescale;
uint64_t time;
int64_t track_duration;
int last_sample_is_subtitle_end;
long sample_count;
long sample_size;
long chunkCount;
int has_keyframes;
int has_disposable;
#define MOV_TRACK_CTTS 0x0001
#define MOV_TRACK_STPS 0x0002
#define MOV_TRACK_ENABLED 0x0004
uint32_t flags;
#define MOV_TIMECODE_FLAG_DROPFRAME 0x0001
#define MOV_TIMECODE_FLAG_24HOURSMAX 0x0002
#define MOV_TIMECODE_FLAG_ALLOWNEGATIVE 0x0004
uint32_t timecode_flags;
int language;
int track_id;
int tag; ///< stsd fourcc
AVStream *st;
AVCodecParameters *par;
int mono_as_fc;
int multichannel_as_mono;
int vos_len;
uint8_t *vos_data;
MOVIentry *cluster;
MOVIentry *cluster_written;
unsigned cluster_capacity;
int audio_vbr;
int height; ///< active picture (w/o VBI) height for D-10/IMX
uint32_t tref_tag;
int tref_id; ///< trackID of the referenced track
int64_t start_dts;
int64_t start_cts;
int64_t end_pts;
int end_reliable;
int64_t dts_shift;
int hint_track; ///< the track that hints this track, -1 if no hint track is set
int src_track; ///< the track that this hint (or tmcd) track describes
AVFormatContext *rtp_ctx; ///< the format context for the hinting rtp muxer
uint32_t prev_rtp_ts;
int64_t cur_rtp_ts_unwrapped;
uint32_t max_packet_size;
int64_t default_duration;
uint32_t default_sample_flags;
uint32_t default_size;
HintSampleQueue sample_queue;
AVPacket *cover_image;
AVIOContext *mdat_buf;
int64_t data_offset;
int frag_discont;
int entries_flushed;
int nb_frag_info;
MOVFragmentInfo *frag_info;
unsigned frag_info_capacity;
struct {
int first_packet_seq;
int first_packet_entry;
int first_packet_seen;
int first_frag_written;
int packet_seq;
int packet_entry;
int slices;
} vc1_info;
void *eac3_priv;
MOVMuxCencContext cenc;
uint32_t palette[AVPALETTE_COUNT];
int pal_done;
int is_unaligned_qt_rgb;
unsigned int squash_fragment_samples_to_one; //< flag to note formats where all samples for a fragment are to be squashed
PacketList squashed_packet_queue;
struct IAMFContext *iamf;
int first_iamf_idx;
int last_iamf_idx;
AVIOContext *iamf_buf;
} MOVTrack;
typedef enum {
MOV_ENC_NONE = 0,
MOV_ENC_CENC_AES_CTR,
} MOVEncryptionScheme;
typedef enum {
MOV_PRFT_NONE = 0,
MOV_PRFT_SRC_WALLCLOCK,
MOV_PRFT_SRC_PTS,
MOV_PRFT_NB
} MOVPrftBox;
typedef struct MOVMuxContext {
const AVClass *av_class;
int mode;
int64_t time;
int nb_streams;
int nb_tracks;
int nb_meta_tmcd; ///< number of new created tmcd track based on metadata (aka not data copy)
int chapter_track; ///< qt chapter track number
int64_t mdat_pos;
uint64_t mdat_size;
MOVTrack *tracks;
int flags;
int rtp_flags;
int iods_skip;
int iods_video_profile;
int iods_audio_profile;
int moov_written;
int fragments;
int max_fragment_duration;
int min_fragment_duration;
int max_fragment_size;
int ism_lookahead;
AVIOContext *mdat_buf;
int first_trun;
int video_track_timescale;
int reserved_moov_size; ///< 0 for disabled, -1 for automatic, size otherwise
int64_t reserved_header_pos;
char *major_brand;
int per_stream_grouping;
AVFormatContext *fc;
AVPacket *pkt;
int use_editlist;
float gamma;
int frag_interleave;
int missing_duration_warned;
char *encryption_scheme_str;
MOVEncryptionScheme encryption_scheme;
uint8_t *encryption_key;
int encryption_key_len;
uint8_t *encryption_kid;
int encryption_kid_len;
int need_rewrite_extradata;
int use_stream_ids_as_track_ids;
int track_ids_ok;
int write_btrt;
int write_tmcd;
MOVPrftBox write_prft;
int empty_hdlr_name;
int movie_timescale;
int64_t avif_extent_pos[2]; // index 0 is YUV and 1 is Alpha.
int avif_extent_length[2]; // index 0 is YUV and 1 is Alpha.
int is_animated_avif;
int avif_loop_count;
} MOVMuxContext;
#define FF_MOV_FLAG_RTP_HINT (1 << 0)
#define FF_MOV_FLAG_FRAGMENT (1 << 1)
#define FF_MOV_FLAG_EMPTY_MOOV (1 << 2)
#define FF_MOV_FLAG_FRAG_KEYFRAME (1 << 3)
#define FF_MOV_FLAG_SEPARATE_MOOF (1 << 4)
#define FF_MOV_FLAG_FRAG_CUSTOM (1 << 5)
#define FF_MOV_FLAG_ISML (1 << 6)
#define FF_MOV_FLAG_FASTSTART (1 << 7)
#define FF_MOV_FLAG_OMIT_TFHD_OFFSET (1 << 8)
#define FF_MOV_FLAG_DISABLE_CHPL (1 << 9)
#define FF_MOV_FLAG_DEFAULT_BASE_MOOF (1 << 10)
#define FF_MOV_FLAG_DASH (1 << 11)
#define FF_MOV_FLAG_FRAG_DISCONT (1 << 12)
#define FF_MOV_FLAG_DELAY_MOOV (1 << 13)
#define FF_MOV_FLAG_GLOBAL_SIDX (1 << 14)
#define FF_MOV_FLAG_WRITE_COLR (1 << 15)
#define FF_MOV_FLAG_WRITE_GAMA (1 << 16)
#define FF_MOV_FLAG_USE_MDTA (1 << 17)
#define FF_MOV_FLAG_SKIP_TRAILER (1 << 18)
#define FF_MOV_FLAG_NEGATIVE_CTS_OFFSETS (1 << 19)
#define FF_MOV_FLAG_FRAG_EVERY_FRAME (1 << 20)
#define FF_MOV_FLAG_SKIP_SIDX (1 << 21)
#define FF_MOV_FLAG_CMAF (1 << 22)
#define FF_MOV_FLAG_PREFER_ICC (1 << 23)
#define FF_MOV_FLAG_HYBRID_FRAGMENTED (1 << 24)
int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt);
int ff_mov_init_hinting(AVFormatContext *s, int index, int src_index);
int ff_mov_add_hinted_packet(AVFormatContext *s, AVPacket *pkt,
int track_index, int sample,
uint8_t *sample_data, int sample_size);
void ff_mov_close_hinting(MOVTrack *track);
#endif /* AVFORMAT_MOVENC_H */
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