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movenc.c
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movenc.c
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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
*/
#include "config_components.h"
#include <stdint.h>
#include <inttypes.h>
#include "movenc.h"
#include "avformat.h"
#include "avio_internal.h"
#include "dovi_isom.h"
#include "riff.h"
#include "avio.h"
#include "iamf_writer.h"
#include "isom.h"
#include "av1.h"
#include "avc.h"
#include "evc.h"
#include "libavcodec/ac3_parser_internal.h"
#include "libavcodec/dnxhddata.h"
#include "libavcodec/flac.h"
#include "libavcodec/get_bits.h"
#include "libavcodec/internal.h"
#include "libavcodec/put_bits.h"
#include "libavcodec/vc1_common.h"
#include "libavcodec/raw.h"
#include "internal.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/csp.h"
#include "libavutil/intfloat.h"
#include "libavutil/mathematics.h"
#include "libavutil/libm.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/dict.h"
#include "libavutil/pixdesc.h"
#include "libavutil/stereo3d.h"
#include "libavutil/timecode.h"
#include "libavutil/dovi_meta.h"
#include "libavutil/uuid.h"
#include "hevc.h"
#include "rtpenc.h"
#include "nal.h"
#include "mov_chan.h"
#include "movenc_ttml.h"
#include "mux.h"
#include "rawutils.h"
#include "ttmlenc.h"
#include "version.h"
#include "vpcc.h"
#include "vvc.h"
static const AVOption options[] = {
{ "brand", "Override major brand", offsetof(MOVMuxContext, major_brand), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = AV_OPT_FLAG_ENCODING_PARAM },
{ "empty_hdlr_name", "write zero-length name string in hdlr atoms within mdia and minf atoms", offsetof(MOVMuxContext, empty_hdlr_name), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
{ "encryption_key", "The media encryption key (hex)", offsetof(MOVMuxContext, encryption_key), AV_OPT_TYPE_BINARY, .flags = AV_OPT_FLAG_ENCODING_PARAM },
{ "encryption_kid", "The media encryption key identifier (hex)", offsetof(MOVMuxContext, encryption_kid), AV_OPT_TYPE_BINARY, .flags = AV_OPT_FLAG_ENCODING_PARAM },
{ "encryption_scheme", "Configures the encryption scheme, allowed values are none, cenc-aes-ctr", offsetof(MOVMuxContext, encryption_scheme_str), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = AV_OPT_FLAG_ENCODING_PARAM },
{ "frag_duration", "Maximum fragment duration", offsetof(MOVMuxContext, max_fragment_duration), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
{ "frag_interleave", "Interleave samples within fragments (max number of consecutive samples, lower is tighter interleaving, but with more overhead)", offsetof(MOVMuxContext, frag_interleave), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
{ "frag_size", "Maximum fragment size", offsetof(MOVMuxContext, max_fragment_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
{ "fragment_index", "Fragment number of the next fragment", offsetof(MOVMuxContext, fragments), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
{ "iods_audio_profile", "iods audio profile atom.", offsetof(MOVMuxContext, iods_audio_profile), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 255, AV_OPT_FLAG_ENCODING_PARAM},
{ "iods_video_profile", "iods video profile atom.", offsetof(MOVMuxContext, iods_video_profile), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 255, AV_OPT_FLAG_ENCODING_PARAM},
{ "ism_lookahead", "Number of lookahead entries for ISM files", offsetof(MOVMuxContext, ism_lookahead), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 255, AV_OPT_FLAG_ENCODING_PARAM},
{ "movflags", "MOV muxer flags", offsetof(MOVMuxContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "cmaf", "Write CMAF compatible fragmented MP4", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_CMAF}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "dash", "Write DASH compatible fragmented MP4", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DASH}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "default_base_moof", "Set the default-base-is-moof flag in tfhd atoms", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DEFAULT_BASE_MOOF}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "delay_moov", "Delay writing the initial moov until the first fragment is cut, or until the first fragment flush", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DELAY_MOOV}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "disable_chpl", "Disable Nero chapter atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DISABLE_CHPL}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "empty_moov", "Make the initial moov atom empty", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_EMPTY_MOOV}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "faststart", "Run a second pass to put the index (moov atom) at the beginning of the file", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FASTSTART}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "frag_custom", "Flush fragments on caller requests", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_CUSTOM}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "frag_discont", "Signal that the next fragment is discontinuous from earlier ones", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_DISCONT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "frag_every_frame", "Fragment at every frame", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_EVERY_FRAME}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "frag_keyframe", "Fragment at video keyframes", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_KEYFRAME}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "global_sidx", "Write a global sidx index at the start of the file", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_GLOBAL_SIDX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "isml", "Create a live smooth streaming feed (for pushing to a publishing point)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_ISML}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "moov_size", "maximum moov size so it can be placed at the begin", offsetof(MOVMuxContext, reserved_moov_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = 0 },
{ "negative_cts_offsets", "Use negative CTS offsets (reducing the need for edit lists)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_NEGATIVE_CTS_OFFSETS}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "omit_tfhd_offset", "Omit the base data offset in tfhd atoms", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_OMIT_TFHD_OFFSET}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "prefer_icc", "If writing colr atom prioritise usage of ICC profile if it exists in stream packet side data", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_PREFER_ICC}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "rtphint", "Add RTP hint tracks", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_RTP_HINT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "separate_moof", "Write separate moof/mdat atoms for each track", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_SEPARATE_MOOF}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "skip_sidx", "Skip writing of sidx atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_SKIP_SIDX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "skip_trailer", "Skip writing the mfra/tfra/mfro trailer for fragmented files", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_SKIP_TRAILER}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "use_metadata_tags", "Use mdta atom for metadata.", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_USE_MDTA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "write_colr", "Write colr atom even if the color info is unspecified (Experimental, may be renamed or changed, do not use from scripts)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_COLR}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "write_gama", "Write deprecated gama atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_GAMA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "hybrid_fragmented", "For recoverability, write a fragmented file that is converted to non-fragmented at the end.", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_HYBRID_FRAGMENTED}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "movflags" },
{ "min_frag_duration", "Minimum fragment duration", offsetof(MOVMuxContext, min_fragment_duration), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
{ "mov_gamma", "gamma value for gama atom", offsetof(MOVMuxContext, gamma), AV_OPT_TYPE_FLOAT, {.dbl = 0.0 }, 0.0, 10, AV_OPT_FLAG_ENCODING_PARAM},
{ "movie_timescale", "set movie timescale", offsetof(MOVMuxContext, movie_timescale), AV_OPT_TYPE_INT, {.i64 = MOV_TIMESCALE}, 1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
FF_RTP_FLAG_OPTS(MOVMuxContext, rtp_flags),
{ "skip_iods", "Skip writing iods atom.", offsetof(MOVMuxContext, iods_skip), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
{ "use_editlist", "use edit list", offsetof(MOVMuxContext, use_editlist), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AV_OPT_FLAG_ENCODING_PARAM},
{ "use_stream_ids_as_track_ids", "use stream ids as track ids", offsetof(MOVMuxContext, use_stream_ids_as_track_ids), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
{ "video_track_timescale", "set timescale of all video tracks", offsetof(MOVMuxContext, video_track_timescale), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
{ "write_btrt", "force or disable writing btrt", offsetof(MOVMuxContext, write_btrt), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AV_OPT_FLAG_ENCODING_PARAM},
{ "write_prft", "Write producer reference time box with specified time source", offsetof(MOVMuxContext, write_prft), AV_OPT_TYPE_INT, {.i64 = MOV_PRFT_NONE}, 0, MOV_PRFT_NB-1, AV_OPT_FLAG_ENCODING_PARAM, .unit = "prft"},
{ "pts", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = MOV_PRFT_SRC_PTS}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM, .unit = "prft"},
{ "wallclock", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = MOV_PRFT_SRC_WALLCLOCK}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM, .unit = "prft"},
{ "write_tmcd", "force or disable writing tmcd", offsetof(MOVMuxContext, write_tmcd), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AV_OPT_FLAG_ENCODING_PARAM},
{ NULL },
};
static const AVClass mov_isobmff_muxer_class = {
.class_name = "mov/mp4/tgp/psp/tg2/ipod/ismv/f4v muxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
static int get_moov_size(AVFormatContext *s);
static int mov_write_single_packet(AVFormatContext *s, AVPacket *pkt);
static int utf8len(const uint8_t *b)
{
int len = 0;
int val;
while (*b) {
GET_UTF8(val, *b++, return -1;)
len++;
}
return len;
}
//FIXME support 64 bit variant with wide placeholders
static int64_t update_size(AVIOContext *pb, int64_t pos)
{
int64_t curpos = avio_tell(pb);
avio_seek(pb, pos, SEEK_SET);
avio_wb32(pb, curpos - pos); /* rewrite size */
avio_seek(pb, curpos, SEEK_SET);
return curpos - pos;
}
static int co64_required(const MOVTrack *track)
{
if (track->entry > 0 && track->cluster[track->entry - 1].pos + track->data_offset > UINT32_MAX)
return 1;
return 0;
}
static int is_cover_image(const AVStream *st)
{
/* Eg. AV_DISPOSITION_ATTACHED_PIC | AV_DISPOSITION_TIMED_THUMBNAILS
* is encoded as sparse video track */
return st && st->disposition == AV_DISPOSITION_ATTACHED_PIC;
}
static int rtp_hinting_needed(const AVStream *st)
{
/* Add hint tracks for each real audio and video stream */
if (is_cover_image(st))
return 0;
return st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ||
st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
}
/* Chunk offset atom */
static int mov_write_stco_tag(AVIOContext *pb, MOVTrack *track)
{
int i;
int mode64 = co64_required(track); // use 32 bit size variant if possible
int64_t pos = avio_tell(pb);
avio_wb32(pb, 0); /* size */
if (mode64)
ffio_wfourcc(pb, "co64");
else
ffio_wfourcc(pb, "stco");
avio_wb32(pb, 0); /* version & flags */
avio_wb32(pb, track->chunkCount); /* entry count */
for (i = 0; i < track->entry; i++) {
if (!track->cluster[i].chunkNum)
continue;
if (mode64 == 1)
avio_wb64(pb, track->cluster[i].pos + track->data_offset);
else
avio_wb32(pb, track->cluster[i].pos + track->data_offset);
}
return update_size(pb, pos);
}
/* Sample size atom */
static int mov_write_stsz_tag(AVIOContext *pb, MOVTrack *track)
{
int equalChunks = 1;
int i, j, entries = 0, tst = -1, oldtst = -1;
int64_t pos = avio_tell(pb);
avio_wb32(pb, 0); /* size */
ffio_wfourcc(pb, "stsz");
avio_wb32(pb, 0); /* version & flags */
for (i = 0; i < track->entry; i++) {
tst = track->cluster[i].size / track->cluster[i].entries;
if (oldtst != -1 && tst != oldtst)
equalChunks = 0;
oldtst = tst;
entries += track->cluster[i].entries;
}
if (equalChunks && track->entry) {
int sSize = track->entry ? track->cluster[0].size / track->cluster[0].entries : 0;
sSize = FFMAX(1, sSize); // adpcm mono case could make sSize == 0
avio_wb32(pb, sSize); // sample size
avio_wb32(pb, entries); // sample count
} else {
avio_wb32(pb, 0); // sample size
avio_wb32(pb, entries); // sample count
for (i = 0; i < track->entry; i++) {
for (j = 0; j < track->cluster[i].entries; j++) {
avio_wb32(pb, track->cluster[i].size /
track->cluster[i].entries);
}
}
}
return update_size(pb, pos);
}
/* Sample to chunk atom */
static int mov_write_stsc_tag(AVIOContext *pb, MOVTrack *track)
{
int index = 0, oldval = -1, i;
int64_t entryPos, curpos;
int64_t pos = avio_tell(pb);
avio_wb32(pb, 0); /* size */
ffio_wfourcc(pb, "stsc");
avio_wb32(pb, 0); // version & flags
entryPos = avio_tell(pb);
avio_wb32(pb, track->chunkCount); // entry count
for (i = 0; i < track->entry; i++) {
if (oldval != track->cluster[i].samples_in_chunk && track->cluster[i].chunkNum) {
avio_wb32(pb, track->cluster[i].chunkNum); // first chunk
avio_wb32(pb, track->cluster[i].samples_in_chunk); // samples per chunk
avio_wb32(pb, 0x1); // sample description index
oldval = track->cluster[i].samples_in_chunk;
index++;
}
}
curpos = avio_tell(pb);
avio_seek(pb, entryPos, SEEK_SET);
avio_wb32(pb, index); // rewrite size
avio_seek(pb, curpos, SEEK_SET);
return update_size(pb, pos);
}
/* Sync sample atom */
static int mov_write_stss_tag(AVIOContext *pb, MOVTrack *track, uint32_t flag)
{
int64_t curpos, entryPos;
int i, index = 0;
int64_t pos = avio_tell(pb);
avio_wb32(pb, 0); // size
ffio_wfourcc(pb, flag == MOV_SYNC_SAMPLE ? "stss" : "stps");
avio_wb32(pb, 0); // version & flags
entryPos = avio_tell(pb);
avio_wb32(pb, track->entry); // entry count
for (i = 0; i < track->entry; i++) {
if (track->cluster[i].flags & flag) {
avio_wb32(pb, i + 1);
index++;
}
}
curpos = avio_tell(pb);
avio_seek(pb, entryPos, SEEK_SET);
avio_wb32(pb, index); // rewrite size
avio_seek(pb, curpos, SEEK_SET);
return update_size(pb, pos);
}
/* Sample dependency atom */
static int mov_write_sdtp_tag(AVIOContext *pb, MOVTrack *track)
{
int i;
uint8_t leading, dependent, reference, redundancy;
int64_t pos = avio_tell(pb);
avio_wb32(pb, 0); // size
ffio_wfourcc(pb, "sdtp");
avio_wb32(pb, 0); // version & flags
for (i = 0; i < track->entry; i++) {
dependent = MOV_SAMPLE_DEPENDENCY_YES;
leading = reference = redundancy = MOV_SAMPLE_DEPENDENCY_UNKNOWN;
if (track->cluster[i].flags & MOV_DISPOSABLE_SAMPLE) {
reference = MOV_SAMPLE_DEPENDENCY_NO;
}
if (track->cluster[i].flags & MOV_SYNC_SAMPLE) {
dependent = MOV_SAMPLE_DEPENDENCY_NO;
}
avio_w8(pb, (leading << 6) | (dependent << 4) |
(reference << 2) | redundancy);
}
return update_size(pb, pos);
}
#if CONFIG_IAMFENC
static int mov_write_iacb_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
{
AVIOContext *dyn_bc;
int64_t pos = avio_tell(pb);
uint8_t *dyn_buf = NULL;
int dyn_size;
int ret = avio_open_dyn_buf(&dyn_bc);
if (ret < 0)
return ret;
avio_wb32(pb, 0);
ffio_wfourcc(pb, "iacb");
avio_w8(pb, 1); // configurationVersion
ret = ff_iamf_write_descriptors(track->iamf, dyn_bc, s);
if (ret < 0)
return ret;
dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
ffio_write_leb(pb, dyn_size);
avio_write(pb, dyn_buf, dyn_size);
av_free(dyn_buf);
return update_size(pb, pos);
}
#endif
static int mov_write_amr_tag(AVIOContext *pb, MOVTrack *track)
{
avio_wb32(pb, 0x11); /* size */
if (track->mode == MODE_MOV) ffio_wfourcc(pb, "samr");
else ffio_wfourcc(pb, "damr");
ffio_wfourcc(pb, "FFMP");
avio_w8(pb, 0); /* decoder version */
avio_wb16(pb, 0x81FF); /* Mode set (all modes for AMR_NB) */
avio_w8(pb, 0x00); /* Mode change period (no restriction) */
avio_w8(pb, 0x01); /* Frames per sample */
return 0x11;
}
struct eac3_info {
AVPacket *pkt;
uint8_t ec3_done;
uint8_t num_blocks;
/* Layout of the EC3SpecificBox */
/* maximum bitrate */
uint16_t data_rate;
int8_t ac3_bit_rate_code;
/* number of independent substreams */
uint8_t num_ind_sub;
struct {
/* sample rate code (see ff_ac3_sample_rate_tab) 2 bits */
uint8_t fscod;
/* bit stream identification 5 bits */
uint8_t bsid;
/* one bit reserved */
/* audio service mixing (not supported yet) 1 bit */
/* bit stream mode 3 bits */
uint8_t bsmod;
/* audio coding mode 3 bits */
uint8_t acmod;
/* sub woofer on 1 bit */
uint8_t lfeon;
/* 3 bits reserved */
/* number of dependent substreams associated with this substream 4 bits */
uint8_t num_dep_sub;
/* channel locations of the dependent substream(s), if any, 9 bits */
uint16_t chan_loc;
/* if there is no dependent substream, then one bit reserved instead */
} substream[1]; /* TODO: support 8 independent substreams */
};
static int mov_write_ac3_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
{
struct eac3_info *info = track->eac3_priv;
PutBitContext pbc;
uint8_t buf[3];
if (!info || !info->ec3_done) {
av_log(s, AV_LOG_ERROR,
"Cannot write moov atom before AC3 packets."
" Set the delay_moov flag to fix this.\n");
return AVERROR(EINVAL);
}
if (info->substream[0].bsid > 8) {
av_log(s, AV_LOG_ERROR,
"RealAudio AC-3/DolbyNet with bsid %d is not defined by the "
"ISOBMFF specification in ETSI TS 102 366!\n",
info->substream[0].bsid);
return AVERROR(EINVAL);
}
if (info->ac3_bit_rate_code < 0) {
av_log(s, AV_LOG_ERROR,
"No valid AC3 bit rate code for data rate of %d!\n",
info->data_rate);
return AVERROR(EINVAL);
}
avio_wb32(pb, 11);
ffio_wfourcc(pb, "dac3");
init_put_bits(&pbc, buf, sizeof(buf));
put_bits(&pbc, 2, info->substream[0].fscod);
put_bits(&pbc, 5, info->substream[0].bsid);
put_bits(&pbc, 3, info->substream[0].bsmod);
put_bits(&pbc, 3, info->substream[0].acmod);
put_bits(&pbc, 1, info->substream[0].lfeon);
put_bits(&pbc, 5, info->ac3_bit_rate_code); // bit_rate_code
put_bits(&pbc, 5, 0); // reserved
flush_put_bits(&pbc);
avio_write(pb, buf, sizeof(buf));
return 11;
}
static int handle_eac3(MOVMuxContext *mov, AVPacket *pkt, MOVTrack *track)
{
AC3HeaderInfo *hdr = NULL;
struct eac3_info *info;
int num_blocks, ret;
if (!track->eac3_priv) {
if (!(track->eac3_priv = av_mallocz(sizeof(*info))))
return AVERROR(ENOMEM);
((struct eac3_info *)track->eac3_priv)->ac3_bit_rate_code = -1;
}
info = track->eac3_priv;
if (!info->pkt && !(info->pkt = av_packet_alloc()))
return AVERROR(ENOMEM);
if ((ret = avpriv_ac3_parse_header(&hdr, pkt->data, pkt->size)) < 0) {
if (ret == AVERROR(ENOMEM))
goto end;
/* drop the packets until we see a good one */
if (!track->entry) {
av_log(mov->fc, AV_LOG_WARNING, "Dropping invalid packet from start of the stream\n");
ret = 0;
} else
ret = AVERROR_INVALIDDATA;
goto end;
}
info->data_rate = FFMAX(info->data_rate, hdr->bit_rate / 1000);
info->ac3_bit_rate_code = FFMAX(info->ac3_bit_rate_code,
hdr->ac3_bit_rate_code);
num_blocks = hdr->num_blocks;
if (!info->ec3_done) {
/* AC-3 substream must be the first one */
if (hdr->bitstream_id <= 10 && hdr->substreamid != 0) {
ret = AVERROR(EINVAL);
goto end;
}
/* this should always be the case, given that our AC-3 parser
* concatenates dependent frames to their independent parent */
if (hdr->frame_type == EAC3_FRAME_TYPE_INDEPENDENT ||
hdr->frame_type == EAC3_FRAME_TYPE_AC3_CONVERT) {
/* substream ids must be incremental */
if (hdr->substreamid > info->num_ind_sub + 1) {
ret = AVERROR(EINVAL);
goto end;
}
if (hdr->substreamid == info->num_ind_sub + 1) {
//info->num_ind_sub++;
avpriv_request_sample(mov->fc, "Multiple independent substreams");
ret = AVERROR_PATCHWELCOME;
goto end;
} else if (hdr->substreamid < info->num_ind_sub ||
hdr->substreamid == 0 && info->substream[0].bsid) {
info->ec3_done = 1;
goto concatenate;
}
} else {
if (hdr->substreamid != 0) {
avpriv_request_sample(mov->fc, "Multiple non EAC3 independent substreams");
ret = AVERROR_PATCHWELCOME;
goto end;
}
}
/* fill the info needed for the "dec3" atom */
info->substream[hdr->substreamid].fscod = hdr->sr_code;
info->substream[hdr->substreamid].bsid = hdr->bitstream_id;
info->substream[hdr->substreamid].bsmod = hdr->bitstream_mode;
info->substream[hdr->substreamid].acmod = hdr->channel_mode;
info->substream[hdr->substreamid].lfeon = hdr->lfe_on;
if (track->par->codec_id == AV_CODEC_ID_AC3) {
// with AC-3 we only require the information of a single packet,
// so we can finish as soon as the basic values of the bit stream
// have been set to the track's informational structure.
info->ec3_done = 1;
goto concatenate;
}
/* Parse dependent substream(s), if any */
if (pkt->size != hdr->frame_size) {
int cumul_size = hdr->frame_size;
int parent = hdr->substreamid;
while (cumul_size != pkt->size) {
GetBitContext gbc;
int i;
ret = avpriv_ac3_parse_header(&hdr, pkt->data + cumul_size, pkt->size - cumul_size);
if (ret < 0)
goto end;
if (hdr->frame_type != EAC3_FRAME_TYPE_DEPENDENT) {
ret = AVERROR(EINVAL);
goto end;
}
info->substream[parent].num_dep_sub++;
ret /= 8;
/* header is parsed up to lfeon, but custom channel map may be needed */
init_get_bits8(&gbc, pkt->data + cumul_size + ret, pkt->size - cumul_size - ret);
/* skip bsid */
skip_bits(&gbc, 5);
/* skip volume control params */
for (i = 0; i < (hdr->channel_mode ? 1 : 2); i++) {
skip_bits(&gbc, 5); // skip dialog normalization
if (get_bits1(&gbc)) {
skip_bits(&gbc, 8); // skip compression gain word
}
}
/* get the dependent stream channel map, if exists */
if (get_bits1(&gbc))
info->substream[parent].chan_loc |= (get_bits(&gbc, 16) >> 5) & 0x1f;
else
info->substream[parent].chan_loc |= hdr->channel_mode;
cumul_size += hdr->frame_size;
}
}
}
concatenate:
if (!info->num_blocks && num_blocks == 6) {
ret = pkt->size;
goto end;
}
else if (info->num_blocks + num_blocks > 6) {
ret = AVERROR_INVALIDDATA;
goto end;
}
if (!info->num_blocks) {
ret = av_packet_ref(info->pkt, pkt);
if (!ret)
info->num_blocks = num_blocks;
goto end;
} else {
if ((ret = av_grow_packet(info->pkt, pkt->size)) < 0)
goto end;
memcpy(info->pkt->data + info->pkt->size - pkt->size, pkt->data, pkt->size);
info->num_blocks += num_blocks;
info->pkt->duration += pkt->duration;
if (info->num_blocks != 6)
goto end;
av_packet_unref(pkt);
av_packet_move_ref(pkt, info->pkt);
info->num_blocks = 0;
}
ret = pkt->size;
end:
av_free(hdr);
return ret;
}
static int mov_write_eac3_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
{
PutBitContext pbc;
uint8_t *buf;
struct eac3_info *info;
int size, i;
if (!track->eac3_priv) {
av_log(s, AV_LOG_ERROR,
"Cannot write moov atom before EAC3 packets parsed.\n");
return AVERROR(EINVAL);
}
info = track->eac3_priv;
size = 2 + ((34 * (info->num_ind_sub + 1) + 7) >> 3);
buf = av_malloc(size);
if (!buf) {
return AVERROR(ENOMEM);
}
init_put_bits(&pbc, buf, size);
put_bits(&pbc, 13, info->data_rate);
put_bits(&pbc, 3, info->num_ind_sub);
for (i = 0; i <= info->num_ind_sub; i++) {
put_bits(&pbc, 2, info->substream[i].fscod);
put_bits(&pbc, 5, info->substream[i].bsid);
put_bits(&pbc, 1, 0); /* reserved */
put_bits(&pbc, 1, 0); /* asvc */
put_bits(&pbc, 3, info->substream[i].bsmod);
put_bits(&pbc, 3, info->substream[i].acmod);
put_bits(&pbc, 1, info->substream[i].lfeon);
put_bits(&pbc, 5, 0); /* reserved */
put_bits(&pbc, 4, info->substream[i].num_dep_sub);
if (!info->substream[i].num_dep_sub) {
put_bits(&pbc, 1, 0); /* reserved */
} else {
put_bits(&pbc, 9, info->substream[i].chan_loc);
}
}
flush_put_bits(&pbc);
size = put_bytes_output(&pbc);
avio_wb32(pb, size + 8);
ffio_wfourcc(pb, "dec3");
avio_write(pb, buf, size);
av_free(buf);
return size;
}
/**
* This function writes extradata "as is".
* Extradata must be formatted like a valid atom (with size and tag).
*/
static int mov_write_extradata_tag(AVIOContext *pb, MOVTrack *track)
{
avio_write(pb, track->par->extradata, track->par->extradata_size);
return track->par->extradata_size;
}
static int mov_write_enda_tag(AVIOContext *pb)
{
avio_wb32(pb, 10);
ffio_wfourcc(pb, "enda");
avio_wb16(pb, 1); /* little endian */
return 10;
}
static int mov_write_enda_tag_be(AVIOContext *pb)
{
avio_wb32(pb, 10);
ffio_wfourcc(pb, "enda");
avio_wb16(pb, 0); /* big endian */
return 10;
}
static void put_descr(AVIOContext *pb, int tag, unsigned int size)
{
int i = 3;
avio_w8(pb, tag);
for (; i > 0; i--)
avio_w8(pb, (size >> (7 * i)) | 0x80);
avio_w8(pb, size & 0x7F);
}
static unsigned compute_avg_bitrate(MOVTrack *track)
{
uint64_t size = 0;
int i;
if (!track->track_duration)
return 0;
for (i = 0; i < track->entry; i++)
size += track->cluster[i].size;
return size * 8 * track->timescale / track->track_duration;
}
struct mpeg4_bit_rate_values {
uint32_t buffer_size; ///< Size of the decoding buffer for the elementary stream in bytes.
uint32_t max_bit_rate; ///< Maximum rate in bits/second over any window of one second.
uint32_t avg_bit_rate; ///< Average rate in bits/second over the entire presentation.
};
static struct mpeg4_bit_rate_values calculate_mpeg4_bit_rates(MOVTrack *track)
{
const AVPacketSideData *sd = track->st ?
av_packet_side_data_get(track->st->codecpar->coded_side_data,
track->st->codecpar->nb_coded_side_data,
AV_PKT_DATA_CPB_PROPERTIES) : NULL;
AVCPBProperties *props = sd ? (AVCPBProperties *)sd->data : NULL;
struct mpeg4_bit_rate_values bit_rates = { 0 };
bit_rates.avg_bit_rate = compute_avg_bitrate(track);
if (!bit_rates.avg_bit_rate) {
// if the average bit rate cannot be calculated at this point, such as
// in the case of fragmented MP4, utilize the following values as
// fall-back in priority order:
//
// 1. average bit rate property
// 2. bit rate (usually average over the whole clip)
// 3. maximum bit rate property
if (props && props->avg_bitrate) {
bit_rates.avg_bit_rate = props->avg_bitrate;
} else if (track->par->bit_rate) {
bit_rates.avg_bit_rate = track->par->bit_rate;
} else if (props && props->max_bitrate) {
bit_rates.avg_bit_rate = props->max_bitrate;
}
}
// (FIXME should be max rate in any 1 sec window)
bit_rates.max_bit_rate = FFMAX(track->par->bit_rate,
bit_rates.avg_bit_rate);
// utilize values from properties if we have them available
if (props) {
bit_rates.max_bit_rate = FFMAX(bit_rates.max_bit_rate,
props->max_bitrate);
bit_rates.buffer_size = props->buffer_size / 8;
}
return bit_rates;
}
static int mov_write_esds_tag(AVIOContext *pb, MOVTrack *track) // Basic
{
struct mpeg4_bit_rate_values bit_rates = calculate_mpeg4_bit_rates(track);
int64_t pos = avio_tell(pb);
int decoder_specific_info_len = track->vos_len ? 5 + track->vos_len : 0;
avio_wb32(pb, 0); // size
ffio_wfourcc(pb, "esds");
avio_wb32(pb, 0); // Version
// ES descriptor
put_descr(pb, 0x03, 3 + 5+13 + decoder_specific_info_len + 5+1);
avio_wb16(pb, track->track_id);
avio_w8(pb, 0x00); // flags (= no flags)
// DecoderConfig descriptor
put_descr(pb, 0x04, 13 + decoder_specific_info_len);
// Object type indication
if ((track->par->codec_id == AV_CODEC_ID_MP2 ||
track->par->codec_id == AV_CODEC_ID_MP3) &&
track->par->sample_rate > 24000)
avio_w8(pb, 0x6B); // 11172-3
else
avio_w8(pb, ff_codec_get_tag(ff_mp4_obj_type, track->par->codec_id));
// the following fields is made of 6 bits to identify the streamtype (4 for video, 5 for audio)
// plus 1 bit to indicate upstream and 1 bit set to 1 (reserved)
if (track->par->codec_id == AV_CODEC_ID_DVD_SUBTITLE)
avio_w8(pb, (0x38 << 2) | 1); // flags (= NeroSubpicStream)
else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO)
avio_w8(pb, 0x15); // flags (= Audiostream)
else
avio_w8(pb, 0x11); // flags (= Visualstream)
avio_wb24(pb, bit_rates.buffer_size); // Buffersize DB
avio_wb32(pb, bit_rates.max_bit_rate); // maxbitrate
avio_wb32(pb, bit_rates.avg_bit_rate);
if (track->vos_len) {
// DecoderSpecific info descriptor
put_descr(pb, 0x05, track->vos_len);
avio_write(pb, track->vos_data, track->vos_len);
}
// SL descriptor
put_descr(pb, 0x06, 1);
avio_w8(pb, 0x02);
return update_size(pb, pos);
}
static int mov_pcm_le_gt16(enum AVCodecID codec_id)
{
return codec_id == AV_CODEC_ID_PCM_S24LE ||
codec_id == AV_CODEC_ID_PCM_S32LE ||
codec_id == AV_CODEC_ID_PCM_F32LE ||
codec_id == AV_CODEC_ID_PCM_F64LE;
}
static int mov_pcm_be_gt16(enum AVCodecID codec_id)
{
return codec_id == AV_CODEC_ID_PCM_S24BE ||
codec_id == AV_CODEC_ID_PCM_S32BE ||
codec_id == AV_CODEC_ID_PCM_F32BE ||
codec_id == AV_CODEC_ID_PCM_F64BE;
}
static int mov_write_ms_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
{
int ret;
int64_t pos = avio_tell(pb);
avio_wb32(pb, 0);
avio_wl32(pb, track->tag); // store it byteswapped
track->par->codec_tag = av_bswap16(track->tag >> 16);
if ((ret = ff_put_wav_header(s, pb, track->par, 0)) < 0)
return ret;
return update_size(pb, pos);
}
static int mov_write_wfex_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
{
int ret;
int64_t pos = avio_tell(pb);
avio_wb32(pb, 0);
ffio_wfourcc(pb, "wfex");
if ((ret = ff_put_wav_header(s, pb, track->st->codecpar, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX)) < 0)
return ret;
return update_size(pb, pos);
}
static int mov_write_dfla_tag(AVIOContext *pb, MOVTrack *track)
{
int64_t pos = avio_tell(pb);
avio_wb32(pb, 0);
ffio_wfourcc(pb, "dfLa");
avio_w8(pb, 0); /* version */
avio_wb24(pb, 0); /* flags */
/* Expect the encoder to pass a METADATA_BLOCK_TYPE_STREAMINFO. */
if (track->par->extradata_size != FLAC_STREAMINFO_SIZE)
return AVERROR_INVALIDDATA;
/* TODO: Write other METADATA_BLOCK_TYPEs if the encoder makes them available. */
avio_w8(pb, 1 << 7 | FLAC_METADATA_TYPE_STREAMINFO); /* LastMetadataBlockFlag << 7 | BlockType */
avio_wb24(pb, track->par->extradata_size); /* Length */
avio_write(pb, track->par->extradata, track->par->extradata_size); /* BlockData[Length] */
return update_size(pb, pos);
}
static int mov_write_dops_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
{
int64_t pos = avio_tell(pb);
int channels, channel_map;
avio_wb32(pb, 0);
ffio_wfourcc(pb, "dOps");
avio_w8(pb, 0); /* Version */
if (track->par->extradata_size < 19) {
av_log(s, AV_LOG_ERROR, "invalid extradata size\n");
return AVERROR_INVALIDDATA;
}
/* extradata contains an Ogg OpusHead, other than byte-ordering and
OpusHead's preceeding magic/version, OpusSpecificBox is currently
identical. */
channels = AV_RB8(track->par->extradata + 9);
channel_map = AV_RB8(track->par->extradata + 18);
avio_w8(pb, channels); /* OuputChannelCount */
avio_wb16(pb, AV_RL16(track->par->extradata + 10)); /* PreSkip */
avio_wb32(pb, AV_RL32(track->par->extradata + 12)); /* InputSampleRate */
avio_wb16(pb, AV_RL16(track->par->extradata + 16)); /* OutputGain */
avio_w8(pb, channel_map); /* ChannelMappingFamily */
/* Write the rest of the header out without byte-swapping. */
if (channel_map) {
if (track->par->extradata_size < 21 + channels) {
av_log(s, AV_LOG_ERROR, "invalid extradata size\n");
return AVERROR_INVALIDDATA;
}
avio_write(pb, track->par->extradata + 19, 2 + channels); /* ChannelMappingTable */
}
return update_size(pb, pos);
}
static int mov_write_dmlp_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
{
int64_t pos = avio_tell(pb);
int length;
avio_wb32(pb, 0);
ffio_wfourcc(pb, "dmlp");
if (track->vos_len < 20) {
av_log(s, AV_LOG_ERROR,
"Cannot write moov atom before TrueHD packets."
" Set the delay_moov flag to fix this.\n");
return AVERROR(EINVAL);
}
length = (AV_RB16(track->vos_data) & 0xFFF) * 2;
if (length < 20 || length > track->vos_len)
return AVERROR_INVALIDDATA;
// Only TrueHD is supported
if (AV_RB32(track->vos_data + 4) != 0xF8726FBA)
return AVERROR_INVALIDDATA;
avio_wb32(pb, AV_RB32(track->vos_data + 8)); /* format_info */
avio_wb16(pb, AV_RB16(track->vos_data + 18) << 1); /* peak_data_rate */
avio_wb32(pb, 0); /* reserved */
return update_size(pb, pos);
}
static int mov_write_SA3D_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
{
const AVDictionaryEntry *str = av_dict_get(track->st->metadata, "SA3D", NULL, 0);
AVChannelLayout ch_layout = { 0 };
int64_t pos;
int ambisonic_order, ambi_channels, non_diegetic_channels;
int i, ret;
if (!str)
return 0;
ret = av_channel_layout_from_string(&ch_layout, str->value);
if (ret < 0) {
if (ret == AVERROR(EINVAL)) {
invalid:
av_log(s, AV_LOG_ERROR, "Invalid SA3D layout: \"%s\"\n", str->value);
ret = 0;
}
av_channel_layout_uninit(&ch_layout);
return ret;
}
if (track->st->codecpar->ch_layout.nb_channels != ch_layout.nb_channels)
goto invalid;
ambisonic_order = av_channel_layout_ambisonic_order(&ch_layout);
if (ambisonic_order < 0)
goto invalid;
ambi_channels = (ambisonic_order + 1LL) * (ambisonic_order + 1LL);
non_diegetic_channels = ch_layout.nb_channels - ambi_channels;
if (non_diegetic_channels &&
(non_diegetic_channels != 2 ||
av_channel_layout_subset(&ch_layout, AV_CH_LAYOUT_STEREO) != AV_CH_LAYOUT_STEREO))
goto invalid;
av_log(s, AV_LOG_VERBOSE, "Inserting SA3D box with layout: \"%s\"\n", str->value);
pos = avio_tell(pb);
avio_wb32(pb, 0); // Size
ffio_wfourcc(pb, "SA3D");
avio_w8(pb, 0); // version
avio_w8(pb, (!!non_diegetic_channels) << 7); // head_locked_stereo and ambisonic_type
avio_wb32(pb, ambisonic_order); // ambisonic_order
avio_w8(pb, 0); // ambisonic_channel_ordering
avio_w8(pb, 0); // ambisonic_normalization
avio_wb32(pb, ch_layout.nb_channels); // num_channels
for (i = 0; i < ambi_channels; i++)
avio_wb32(pb, av_channel_layout_channel_from_index(&ch_layout, i) - AV_CHAN_AMBISONIC_BASE);
for (; i < ch_layout.nb_channels; i++)
avio_wb32(pb, av_channel_layout_channel_from_index(&ch_layout, i) + ambi_channels);
av_channel_layout_uninit(&ch_layout);
return update_size(pb, pos);
}
static int mov_write_chan_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
{
uint32_t layout_tag, bitmap, *channel_desc;
int64_t pos = avio_tell(pb);
int num_desc, ret;
if (track->multichannel_as_mono)
return 0;
ret = ff_mov_get_channel_layout_tag(track->par, &layout_tag,
&bitmap, &channel_desc);
if (ret < 0) {
if (ret == AVERROR(ENOSYS)) {
av_log(s, AV_LOG_WARNING, "not writing 'chan' tag due to "
"lack of channel information\n");
ret = 0;
}
return ret;
}