27fbe31c92
* qatar/master: Revert "avconv: use stream copy by default when possible." avconv: print stream copy information. avconv: use stream copy by default when possible. matroskaenc: vertical alignment. matroskaenc: implement query_codec() lavf: add avformat_query_codec(). lavc: add avcodec_get_type() for mapping codec_id -> type. flvenc: use int64_t to store offsets avconv: don't segfault on 0 input files. Do not write ID3v1 tags by default mpegts: log into an AVFormatContext rather than MpegTSContext. Conflicts: doc/APIchanges libavcodec/version.h libavformat/avformat.h libavformat/mp3enc.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
1268 lines
43 KiB
C
1268 lines
43 KiB
C
/*
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* Matroska muxer
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* Copyright (c) 2007 David Conrad
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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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#include "avformat.h"
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#include "riff.h"
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#include "isom.h"
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#include "matroska.h"
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#include "avc.h"
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#include "flacenc.h"
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#include "avlanguage.h"
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#include "libavutil/samplefmt.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/intfloat_readwrite.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/random_seed.h"
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#include "libavutil/lfg.h"
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#include "libavutil/dict.h"
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#include "libavcodec/xiph.h"
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#include "libavcodec/mpeg4audio.h"
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#include <strings.h>
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typedef struct ebml_master {
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int64_t pos; ///< absolute offset in the file where the master's elements start
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int sizebytes; ///< how many bytes were reserved for the size
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} ebml_master;
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typedef struct mkv_seekhead_entry {
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unsigned int elementid;
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uint64_t segmentpos;
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} mkv_seekhead_entry;
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typedef struct mkv_seekhead {
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int64_t filepos;
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int64_t segment_offset; ///< the file offset to the beginning of the segment
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int reserved_size; ///< -1 if appending to file
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int max_entries;
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mkv_seekhead_entry *entries;
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int num_entries;
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} mkv_seekhead;
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typedef struct {
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uint64_t pts;
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int tracknum;
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int64_t cluster_pos; ///< file offset of the cluster containing the block
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} mkv_cuepoint;
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typedef struct {
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int64_t segment_offset;
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mkv_cuepoint *entries;
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int num_entries;
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} mkv_cues;
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typedef struct {
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int write_dts;
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} mkv_track;
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#define MODE_MATROSKAv2 0x01
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#define MODE_WEBM 0x02
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typedef struct MatroskaMuxContext {
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int mode;
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AVIOContext *dyn_bc;
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ebml_master segment;
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int64_t segment_offset;
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ebml_master cluster;
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int64_t cluster_pos; ///< file offset of the current cluster
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int64_t cluster_pts;
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int64_t duration_offset;
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int64_t duration;
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mkv_seekhead *main_seekhead;
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mkv_cues *cues;
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mkv_track *tracks;
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unsigned int audio_buffer_size;
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AVPacket cur_audio_pkt;
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} MatroskaMuxContext;
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/** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
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* offset, 4 bytes for target EBML ID */
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#define MAX_SEEKENTRY_SIZE 21
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/** per-cuepoint-track - 3 1-byte EBML IDs, 3 1-byte EBML sizes, 2
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* 8-byte uint max */
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#define MAX_CUETRACKPOS_SIZE 22
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/** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
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#define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE*num_tracks
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static int ebml_id_size(unsigned int id)
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{
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return (av_log2(id+1)-1)/7+1;
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}
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static void put_ebml_id(AVIOContext *pb, unsigned int id)
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{
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int i = ebml_id_size(id);
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while (i--)
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avio_w8(pb, id >> (i*8));
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}
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/**
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* Write an EBML size meaning "unknown size".
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*
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* @param bytes The number of bytes the size should occupy (maximum: 8).
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*/
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static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
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{
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assert(bytes <= 8);
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avio_w8(pb, 0x1ff >> bytes);
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while (--bytes)
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avio_w8(pb, 0xff);
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}
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/**
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* Calculate how many bytes are needed to represent a given number in EBML.
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*/
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static int ebml_num_size(uint64_t num)
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{
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int bytes = 1;
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while ((num+1) >> bytes*7) bytes++;
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return bytes;
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}
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/**
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* Write a number in EBML variable length format.
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*
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* @param bytes The number of bytes that need to be used to write the number.
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* If zero, any number of bytes can be used.
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*/
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static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
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{
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int i, needed_bytes = ebml_num_size(num);
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// sizes larger than this are currently undefined in EBML
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assert(num < (1ULL<<56)-1);
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if (bytes == 0)
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// don't care how many bytes are used, so use the min
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bytes = needed_bytes;
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// the bytes needed to write the given size would exceed the bytes
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// that we need to use, so write unknown size. This shouldn't happen.
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assert(bytes >= needed_bytes);
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num |= 1ULL << bytes*7;
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for (i = bytes - 1; i >= 0; i--)
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avio_w8(pb, num >> i*8);
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}
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static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
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{
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int i, bytes = 1;
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uint64_t tmp = val;
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while (tmp>>=8) bytes++;
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put_ebml_id(pb, elementid);
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put_ebml_num(pb, bytes, 0);
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for (i = bytes - 1; i >= 0; i--)
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avio_w8(pb, val >> i*8);
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}
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static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
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{
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put_ebml_id(pb, elementid);
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put_ebml_num(pb, 8, 0);
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avio_wb64(pb, av_dbl2int(val));
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}
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static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
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const void *buf, int size)
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{
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put_ebml_id(pb, elementid);
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put_ebml_num(pb, size, 0);
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avio_write(pb, buf, size);
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}
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static void put_ebml_string(AVIOContext *pb, unsigned int elementid, const char *str)
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{
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put_ebml_binary(pb, elementid, str, strlen(str));
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}
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/**
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* Write a void element of a given size. Useful for reserving space in
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* the file to be written to later.
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*
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* @param size The number of bytes to reserve, which must be at least 2.
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*/
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static void put_ebml_void(AVIOContext *pb, uint64_t size)
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{
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int64_t currentpos = avio_tell(pb);
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assert(size >= 2);
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put_ebml_id(pb, EBML_ID_VOID);
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// we need to subtract the length needed to store the size from the
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// size we need to reserve so 2 cases, we use 8 bytes to store the
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// size if possible, 1 byte otherwise
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if (size < 10)
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put_ebml_num(pb, size-1, 0);
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else
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put_ebml_num(pb, size-9, 8);
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while(avio_tell(pb) < currentpos + size)
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avio_w8(pb, 0);
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}
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static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid, uint64_t expectedsize)
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{
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int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
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put_ebml_id(pb, elementid);
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put_ebml_size_unknown(pb, bytes);
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return (ebml_master){ avio_tell(pb), bytes };
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}
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static void end_ebml_master(AVIOContext *pb, ebml_master master)
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{
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int64_t pos = avio_tell(pb);
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if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
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return;
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put_ebml_num(pb, pos - master.pos, master.sizebytes);
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avio_seek(pb, pos, SEEK_SET);
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}
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static void put_xiph_size(AVIOContext *pb, int size)
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{
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int i;
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for (i = 0; i < size / 255; i++)
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avio_w8(pb, 255);
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avio_w8(pb, size % 255);
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}
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/**
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* Initialize a mkv_seekhead element to be ready to index level 1 Matroska
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* elements. If a maximum number of elements is specified, enough space
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* will be reserved at the current file location to write a seek head of
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* that size.
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*
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* @param segment_offset The absolute offset to the position in the file
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* where the segment begins.
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* @param numelements The maximum number of elements that will be indexed
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* by this seek head, 0 if unlimited.
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*/
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static mkv_seekhead * mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset, int numelements)
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{
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mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
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if (new_seekhead == NULL)
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return NULL;
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new_seekhead->segment_offset = segment_offset;
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if (numelements > 0) {
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new_seekhead->filepos = avio_tell(pb);
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// 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
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// and size, and 3 bytes to guarantee that an EBML void element
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// will fit afterwards
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new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
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new_seekhead->max_entries = numelements;
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put_ebml_void(pb, new_seekhead->reserved_size);
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}
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return new_seekhead;
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}
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static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
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{
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mkv_seekhead_entry *entries = seekhead->entries;
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// don't store more elements than we reserved space for
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if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
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return -1;
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entries = av_realloc(entries, (seekhead->num_entries + 1) * sizeof(mkv_seekhead_entry));
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if (entries == NULL)
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return AVERROR(ENOMEM);
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entries[seekhead->num_entries ].elementid = elementid;
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entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
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seekhead->entries = entries;
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return 0;
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}
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/**
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* Write the seek head to the file and free it. If a maximum number of
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* elements was specified to mkv_start_seekhead(), the seek head will
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* be written at the location reserved for it. Otherwise, it is written
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* at the current location in the file.
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*
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* @return The file offset where the seekhead was written,
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* -1 if an error occurred.
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*/
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static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
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{
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ebml_master metaseek, seekentry;
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int64_t currentpos;
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int i;
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currentpos = avio_tell(pb);
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if (seekhead->reserved_size > 0)
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if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0)
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return -1;
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metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
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for (i = 0; i < seekhead->num_entries; i++) {
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mkv_seekhead_entry *entry = &seekhead->entries[i];
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seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
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put_ebml_id(pb, MATROSKA_ID_SEEKID);
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put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
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put_ebml_id(pb, entry->elementid);
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put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
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end_ebml_master(pb, seekentry);
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}
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end_ebml_master(pb, metaseek);
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if (seekhead->reserved_size > 0) {
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uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
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put_ebml_void(pb, remaining);
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avio_seek(pb, currentpos, SEEK_SET);
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currentpos = seekhead->filepos;
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}
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av_free(seekhead->entries);
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av_free(seekhead);
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return currentpos;
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}
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static mkv_cues * mkv_start_cues(int64_t segment_offset)
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{
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mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
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if (cues == NULL)
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return NULL;
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cues->segment_offset = segment_offset;
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return cues;
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}
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static int mkv_add_cuepoint(mkv_cues *cues, int stream, int64_t ts, int64_t cluster_pos)
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{
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mkv_cuepoint *entries = cues->entries;
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entries = av_realloc(entries, (cues->num_entries + 1) * sizeof(mkv_cuepoint));
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if (entries == NULL)
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return AVERROR(ENOMEM);
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if (ts < 0)
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return 0;
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entries[cues->num_entries ].pts = ts;
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entries[cues->num_entries ].tracknum = stream + 1;
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entries[cues->num_entries++].cluster_pos = cluster_pos - cues->segment_offset;
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cues->entries = entries;
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return 0;
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}
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static int64_t mkv_write_cues(AVIOContext *pb, mkv_cues *cues, int num_tracks)
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{
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ebml_master cues_element;
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int64_t currentpos;
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int i, j;
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currentpos = avio_tell(pb);
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cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
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for (i = 0; i < cues->num_entries; i++) {
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ebml_master cuepoint, track_positions;
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mkv_cuepoint *entry = &cues->entries[i];
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uint64_t pts = entry->pts;
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cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(num_tracks));
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put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
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// put all the entries from different tracks that have the exact same
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// timestamp into the same CuePoint
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for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
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track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
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put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
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put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION, entry[j].cluster_pos);
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end_ebml_master(pb, track_positions);
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}
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i += j - 1;
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end_ebml_master(pb, cuepoint);
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}
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end_ebml_master(pb, cues_element);
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return currentpos;
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}
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static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec)
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{
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uint8_t *header_start[3];
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int header_len[3];
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int first_header_size;
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int j;
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if (codec->codec_id == CODEC_ID_VORBIS)
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first_header_size = 30;
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else
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first_header_size = 42;
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if (ff_split_xiph_headers(codec->extradata, codec->extradata_size,
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first_header_size, header_start, header_len) < 0) {
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av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
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return -1;
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}
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avio_w8(pb, 2); // number packets - 1
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for (j = 0; j < 2; j++) {
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put_xiph_size(pb, header_len[j]);
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}
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for (j = 0; j < 3; j++)
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avio_write(pb, header_start[j], header_len[j]);
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return 0;
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}
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static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate)
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{
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MPEG4AudioConfig mp4ac;
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if (ff_mpeg4audio_get_config(&mp4ac, codec->extradata, codec->extradata_size) < 0) {
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av_log(s, AV_LOG_WARNING, "Error parsing AAC extradata, unable to determine samplerate.\n");
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return;
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}
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*sample_rate = mp4ac.sample_rate;
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*output_sample_rate = mp4ac.ext_sample_rate;
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}
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static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int native_id, int qt_id)
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{
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AVIOContext *dyn_cp;
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uint8_t *codecpriv;
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int ret, codecpriv_size;
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ret = avio_open_dyn_buf(&dyn_cp);
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if(ret < 0)
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return ret;
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if (native_id) {
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if (codec->codec_id == CODEC_ID_VORBIS || codec->codec_id == CODEC_ID_THEORA)
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ret = put_xiph_codecpriv(s, dyn_cp, codec);
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else if (codec->codec_id == CODEC_ID_FLAC)
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ret = ff_flac_write_header(dyn_cp, codec, 1);
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else if (codec->codec_id == CODEC_ID_H264)
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ret = ff_isom_write_avcc(dyn_cp, codec->extradata, codec->extradata_size);
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else if (codec->extradata_size)
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avio_write(dyn_cp, codec->extradata, codec->extradata_size);
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|
} else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
if (qt_id) {
|
|
if (!codec->codec_tag)
|
|
codec->codec_tag = ff_codec_get_tag(codec_movvideo_tags, codec->codec_id);
|
|
if (codec->extradata_size)
|
|
avio_write(dyn_cp, codec->extradata, codec->extradata_size);
|
|
} else {
|
|
if (!codec->codec_tag)
|
|
codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id);
|
|
if (!codec->codec_tag) {
|
|
av_log(s, AV_LOG_ERROR, "No bmp codec ID found.\n");
|
|
ret = -1;
|
|
}
|
|
|
|
ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0);
|
|
}
|
|
|
|
} else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
unsigned int tag;
|
|
tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
|
|
if (!tag) {
|
|
av_log(s, AV_LOG_ERROR, "No wav codec ID found.\n");
|
|
ret = -1;
|
|
}
|
|
if (!codec->codec_tag)
|
|
codec->codec_tag = tag;
|
|
|
|
ff_put_wav_header(dyn_cp, codec);
|
|
}
|
|
|
|
codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
|
|
if (codecpriv_size)
|
|
put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv, codecpriv_size);
|
|
av_free(codecpriv);
|
|
return ret;
|
|
}
|
|
|
|
static int mkv_write_tracks(AVFormatContext *s)
|
|
{
|
|
MatroskaMuxContext *mkv = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
ebml_master tracks;
|
|
int i, j, ret;
|
|
|
|
ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
|
|
if (ret < 0) return ret;
|
|
|
|
tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
AVStream *st = s->streams[i];
|
|
AVCodecContext *codec = st->codec;
|
|
ebml_master subinfo, track;
|
|
int native_id = 0;
|
|
int qt_id = 0;
|
|
int bit_depth = av_get_bits_per_sample(codec->codec_id);
|
|
int sample_rate = codec->sample_rate;
|
|
int output_sample_rate = 0;
|
|
AVDictionaryEntry *tag;
|
|
|
|
if (!bit_depth)
|
|
bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
|
|
|
|
if (codec->codec_id == CODEC_ID_AAC)
|
|
get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
|
|
|
|
track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
|
|
put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER , i + 1);
|
|
put_ebml_uint (pb, MATROSKA_ID_TRACKUID , i + 1);
|
|
put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
|
|
|
|
if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
|
|
put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
|
|
tag = av_dict_get(st->metadata, "language", NULL, 0);
|
|
put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag ? tag->value:"und");
|
|
|
|
if (st->disposition)
|
|
put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
|
|
|
|
// look for a codec ID string specific to mkv to use,
|
|
// if none are found, use AVI codes
|
|
for (j = 0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++) {
|
|
if (ff_mkv_codec_tags[j].id == codec->codec_id) {
|
|
put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
|
|
native_id = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (mkv->mode == MODE_WEBM && !(codec->codec_id == CODEC_ID_VP8 ||
|
|
codec->codec_id == CODEC_ID_VORBIS)) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Only VP8 video and Vorbis audio are supported for WebM.\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
switch (codec->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
|
|
put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9);
|
|
|
|
if (!native_id &&
|
|
ff_codec_get_tag(codec_movvideo_tags, codec->codec_id) &&
|
|
(!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id)
|
|
|| codec->codec_id == CODEC_ID_SVQ1
|
|
|| codec->codec_id == CODEC_ID_SVQ3
|
|
|| codec->codec_id == CODEC_ID_CINEPAK))
|
|
qt_id = 1;
|
|
|
|
if (qt_id)
|
|
put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
|
|
else if (!native_id) {
|
|
// if there is no mkv-specific codec ID, use VFW mode
|
|
put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
|
|
mkv->tracks[i].write_dts = 1;
|
|
}
|
|
|
|
subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
|
|
// XXX: interlace flag?
|
|
put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
|
|
put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
|
|
|
|
if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
|
|
(tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
|
|
// save stereo mode flag
|
|
uint64_t st_mode = MATROSKA_VIDEO_STEREO_MODE_COUNT;
|
|
|
|
for (j=0; j<MATROSKA_VIDEO_STEREO_MODE_COUNT; j++)
|
|
if (!strcmp(tag->value, matroska_video_stereo_mode[j])){
|
|
st_mode = j;
|
|
break;
|
|
}
|
|
|
|
if ((mkv->mode == MODE_WEBM && st_mode > 3 && st_mode != 11)
|
|
|| st_mode >= MATROSKA_VIDEO_STEREO_MODE_COUNT) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"The specified stereo mode is not valid.\n");
|
|
return AVERROR(EINVAL);
|
|
} else
|
|
put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, st_mode);
|
|
}
|
|
|
|
if (st->sample_aspect_ratio.num) {
|
|
int d_width = codec->width*av_q2d(st->sample_aspect_ratio);
|
|
put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width);
|
|
put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height);
|
|
put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, 3);
|
|
}
|
|
|
|
if (codec->codec_id == CODEC_ID_RAWVIDEO) {
|
|
uint32_t color_space = av_le2ne32(codec->codec_tag);
|
|
put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
|
|
}
|
|
end_ebml_master(pb, subinfo);
|
|
break;
|
|
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
|
|
|
|
if (!native_id)
|
|
// no mkv-specific ID, use ACM mode
|
|
put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
|
|
|
|
subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
|
|
put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
|
|
put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
|
|
if (output_sample_rate)
|
|
put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
|
|
if (bit_depth)
|
|
put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
|
|
end_ebml_master(pb, subinfo);
|
|
break;
|
|
|
|
case AVMEDIA_TYPE_SUBTITLE:
|
|
put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_SUBTITLE);
|
|
if (!native_id) {
|
|
av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
break;
|
|
default:
|
|
av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
|
|
break;
|
|
}
|
|
ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
|
|
if (ret < 0) return ret;
|
|
|
|
end_ebml_master(pb, track);
|
|
|
|
// ms precision is the de-facto standard timescale for mkv files
|
|
av_set_pts_info(st, 64, 1, 1000);
|
|
}
|
|
end_ebml_master(pb, tracks);
|
|
return 0;
|
|
}
|
|
|
|
static int mkv_write_chapters(AVFormatContext *s)
|
|
{
|
|
MatroskaMuxContext *mkv = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
ebml_master chapters, editionentry;
|
|
AVRational scale = {1, 1E9};
|
|
int i, ret;
|
|
|
|
if (!s->nb_chapters)
|
|
return 0;
|
|
|
|
ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
|
|
if (ret < 0) return ret;
|
|
|
|
chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
|
|
editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
|
|
put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
|
|
put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
|
|
for (i = 0; i < s->nb_chapters; i++) {
|
|
ebml_master chapteratom, chapterdisplay;
|
|
AVChapter *c = s->chapters[i];
|
|
AVDictionaryEntry *t = NULL;
|
|
|
|
chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
|
|
put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id);
|
|
put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART,
|
|
av_rescale_q(c->start, c->time_base, scale));
|
|
put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND,
|
|
av_rescale_q(c->end, c->time_base, scale));
|
|
put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
|
|
put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
|
|
if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
|
|
chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
|
|
put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
|
|
put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
|
|
end_ebml_master(pb, chapterdisplay);
|
|
}
|
|
end_ebml_master(pb, chapteratom);
|
|
}
|
|
end_ebml_master(pb, editionentry);
|
|
end_ebml_master(pb, chapters);
|
|
return 0;
|
|
}
|
|
|
|
static void mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
|
|
{
|
|
uint8_t *key = av_strdup(t->key);
|
|
uint8_t *p = key;
|
|
const uint8_t *lang = NULL;
|
|
ebml_master tag;
|
|
|
|
if ((p = strrchr(p, '-')) &&
|
|
(lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
|
|
*p = 0;
|
|
|
|
p = key;
|
|
while (*p) {
|
|
if (*p == ' ')
|
|
*p = '_';
|
|
else if (*p >= 'a' && *p <= 'z')
|
|
*p -= 'a' - 'A';
|
|
p++;
|
|
}
|
|
|
|
tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
|
|
put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
|
|
if (lang)
|
|
put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
|
|
put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
|
|
end_ebml_master(pb, tag);
|
|
|
|
av_freep(&key);
|
|
}
|
|
|
|
static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
|
|
unsigned int uid, ebml_master *tags)
|
|
{
|
|
MatroskaMuxContext *mkv = s->priv_data;
|
|
ebml_master tag, targets;
|
|
AVDictionaryEntry *t = NULL;
|
|
int ret;
|
|
|
|
if (!tags->pos) {
|
|
ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
|
|
if (ret < 0) return ret;
|
|
|
|
*tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
|
|
}
|
|
|
|
tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
|
|
targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
|
|
if (elementid)
|
|
put_ebml_uint(s->pb, elementid, uid);
|
|
end_ebml_master(s->pb, targets);
|
|
|
|
while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
|
|
if (strcasecmp(t->key, "title") && strcasecmp(t->key, "stereo_mode"))
|
|
mkv_write_simpletag(s->pb, t);
|
|
|
|
end_ebml_master(s->pb, tag);
|
|
return 0;
|
|
}
|
|
|
|
static int mkv_write_tags(AVFormatContext *s)
|
|
{
|
|
ebml_master tags = {0};
|
|
int i, ret;
|
|
|
|
ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
|
|
|
|
if (av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX)) {
|
|
ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
|
|
if (ret < 0) return ret;
|
|
}
|
|
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
AVStream *st = s->streams[i];
|
|
|
|
if (!av_dict_get(st->metadata, "", 0, AV_DICT_IGNORE_SUFFIX))
|
|
continue;
|
|
|
|
ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
|
|
if (ret < 0) return ret;
|
|
}
|
|
|
|
for (i = 0; i < s->nb_chapters; i++) {
|
|
AVChapter *ch = s->chapters[i];
|
|
|
|
if (!av_dict_get(ch->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
|
|
continue;
|
|
|
|
ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id, &tags);
|
|
if (ret < 0) return ret;
|
|
}
|
|
|
|
if (tags.pos)
|
|
end_ebml_master(s->pb, tags);
|
|
return 0;
|
|
}
|
|
|
|
static int mkv_write_header(AVFormatContext *s)
|
|
{
|
|
MatroskaMuxContext *mkv = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
ebml_master ebml_header, segment_info;
|
|
AVDictionaryEntry *tag;
|
|
int ret, i;
|
|
|
|
if (!strcmp(s->oformat->name, "webm")) mkv->mode = MODE_WEBM;
|
|
else mkv->mode = MODE_MATROSKAv2;
|
|
|
|
mkv->tracks = av_mallocz(s->nb_streams * sizeof(*mkv->tracks));
|
|
if (!mkv->tracks)
|
|
return AVERROR(ENOMEM);
|
|
|
|
ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
|
|
put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
|
|
put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
|
|
put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
|
|
put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
|
|
put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
|
|
put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , 2);
|
|
put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
|
|
end_ebml_master(pb, ebml_header);
|
|
|
|
mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
|
|
mkv->segment_offset = avio_tell(pb);
|
|
|
|
// we write 2 seek heads - one at the end of the file to point to each
|
|
// cluster, and one at the beginning to point to all other level one
|
|
// elements (including the seek head at the end of the file), which
|
|
// isn't more than 10 elements if we only write one of each other
|
|
// currently defined level 1 element
|
|
mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
|
|
if (!mkv->main_seekhead)
|
|
return AVERROR(ENOMEM);
|
|
|
|
ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
|
|
if (ret < 0) return ret;
|
|
|
|
segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
|
|
put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
|
|
if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
|
|
put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
|
|
if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
|
|
uint32_t segment_uid[4];
|
|
AVLFG lfg;
|
|
|
|
av_lfg_init(&lfg, av_get_random_seed());
|
|
|
|
for (i = 0; i < 4; i++)
|
|
segment_uid[i] = av_lfg_get(&lfg);
|
|
|
|
put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , LIBAVFORMAT_IDENT);
|
|
put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
|
|
put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
|
|
}
|
|
|
|
// reserve space for the duration
|
|
mkv->duration = 0;
|
|
mkv->duration_offset = avio_tell(pb);
|
|
put_ebml_void(pb, 11); // assumes double-precision float to be written
|
|
end_ebml_master(pb, segment_info);
|
|
|
|
ret = mkv_write_tracks(s);
|
|
if (ret < 0) return ret;
|
|
|
|
if (mkv->mode != MODE_WEBM) {
|
|
ret = mkv_write_chapters(s);
|
|
if (ret < 0) return ret;
|
|
|
|
ret = mkv_write_tags(s);
|
|
if (ret < 0) return ret;
|
|
}
|
|
|
|
if (!s->pb->seekable)
|
|
mkv_write_seekhead(pb, mkv->main_seekhead);
|
|
|
|
mkv->cues = mkv_start_cues(mkv->segment_offset);
|
|
if (mkv->cues == NULL)
|
|
return AVERROR(ENOMEM);
|
|
|
|
av_init_packet(&mkv->cur_audio_pkt);
|
|
mkv->cur_audio_pkt.size = 0;
|
|
mkv->audio_buffer_size = 0;
|
|
|
|
avio_flush(pb);
|
|
return 0;
|
|
}
|
|
|
|
static int mkv_blockgroup_size(int pkt_size)
|
|
{
|
|
int size = pkt_size + 4;
|
|
size += ebml_num_size(size);
|
|
size += 2; // EBML ID for block and block duration
|
|
size += 8; // max size of block duration
|
|
size += ebml_num_size(size);
|
|
size += 1; // blockgroup EBML ID
|
|
return size;
|
|
}
|
|
|
|
static int ass_get_duration(const uint8_t *p)
|
|
{
|
|
int sh, sm, ss, sc, eh, em, es, ec;
|
|
uint64_t start, end;
|
|
|
|
if (sscanf(p, "%*[^,],%d:%d:%d%*c%d,%d:%d:%d%*c%d",
|
|
&sh, &sm, &ss, &sc, &eh, &em, &es, &ec) != 8)
|
|
return 0;
|
|
start = 3600000*sh + 60000*sm + 1000*ss + 10*sc;
|
|
end = 3600000*eh + 60000*em + 1000*es + 10*ec;
|
|
return end - start;
|
|
}
|
|
|
|
static int mkv_write_ass_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
|
|
{
|
|
MatroskaMuxContext *mkv = s->priv_data;
|
|
int i, layer = 0, max_duration = 0, size, line_size, data_size = pkt->size;
|
|
uint8_t *start, *end, *data = pkt->data;
|
|
ebml_master blockgroup;
|
|
char buffer[2048];
|
|
|
|
while (data_size) {
|
|
int duration = ass_get_duration(data);
|
|
max_duration = FFMAX(duration, max_duration);
|
|
end = memchr(data, '\n', data_size);
|
|
size = line_size = end ? end-data+1 : data_size;
|
|
size -= end ? (end[-1]=='\r')+1 : 0;
|
|
start = data;
|
|
for (i=0; i<3; i++, start++)
|
|
if (!(start = memchr(start, ',', size-(start-data))))
|
|
return max_duration;
|
|
size -= start - data;
|
|
sscanf(data, "Dialogue: %d,", &layer);
|
|
i = snprintf(buffer, sizeof(buffer), "%"PRId64",%d,",
|
|
s->streams[pkt->stream_index]->nb_frames, layer);
|
|
size = FFMIN(i+size, sizeof(buffer));
|
|
memcpy(buffer+i, start, size-i);
|
|
|
|
av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
|
|
"pts %" PRId64 ", duration %d\n",
|
|
avio_tell(pb), size, pkt->pts, duration);
|
|
blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
|
|
put_ebml_id(pb, MATROSKA_ID_BLOCK);
|
|
put_ebml_num(pb, size+4, 0);
|
|
avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
|
|
avio_wb16(pb, pkt->pts - mkv->cluster_pts);
|
|
avio_w8(pb, 0);
|
|
avio_write(pb, buffer, size);
|
|
put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
|
|
end_ebml_master(pb, blockgroup);
|
|
|
|
data += line_size;
|
|
data_size -= line_size;
|
|
}
|
|
|
|
return max_duration;
|
|
}
|
|
|
|
static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
|
|
unsigned int blockid, AVPacket *pkt, int flags)
|
|
{
|
|
MatroskaMuxContext *mkv = s->priv_data;
|
|
AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
|
|
uint8_t *data = NULL;
|
|
int size = pkt->size;
|
|
int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
|
|
|
|
av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
|
|
"pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
|
|
avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
|
|
if (codec->codec_id == CODEC_ID_H264 && codec->extradata_size > 0 &&
|
|
(AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
|
|
ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
|
|
else
|
|
data = pkt->data;
|
|
put_ebml_id(pb, blockid);
|
|
put_ebml_num(pb, size+4, 0);
|
|
avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
|
|
avio_wb16(pb, ts - mkv->cluster_pts);
|
|
avio_w8(pb, flags);
|
|
avio_write(pb, data, size);
|
|
if (data != pkt->data)
|
|
av_free(data);
|
|
}
|
|
|
|
static int srt_get_duration(uint8_t **buf)
|
|
{
|
|
int i, duration = 0;
|
|
|
|
for (i=0; i<2 && !duration; i++) {
|
|
int s_hour, s_min, s_sec, s_hsec, e_hour, e_min, e_sec, e_hsec;
|
|
if (sscanf(*buf, "%d:%2d:%2d%*1[,.]%3d --> %d:%2d:%2d%*1[,.]%3d",
|
|
&s_hour, &s_min, &s_sec, &s_hsec,
|
|
&e_hour, &e_min, &e_sec, &e_hsec) == 8) {
|
|
s_min += 60*s_hour; e_min += 60*e_hour;
|
|
s_sec += 60*s_min; e_sec += 60*e_min;
|
|
s_hsec += 1000*s_sec; e_hsec += 1000*e_sec;
|
|
duration = e_hsec - s_hsec;
|
|
}
|
|
*buf += strcspn(*buf, "\n") + 1;
|
|
}
|
|
return duration;
|
|
}
|
|
|
|
static int mkv_write_srt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
|
|
{
|
|
ebml_master blockgroup;
|
|
AVPacket pkt2 = *pkt;
|
|
int64_t duration = srt_get_duration(&pkt2.data);
|
|
pkt2.size -= pkt2.data - pkt->data;
|
|
|
|
blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
|
|
mkv_blockgroup_size(pkt2.size));
|
|
mkv_write_block(s, pb, MATROSKA_ID_BLOCK, &pkt2, 0);
|
|
put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
|
|
end_ebml_master(pb, blockgroup);
|
|
|
|
return duration;
|
|
}
|
|
|
|
static void mkv_flush_dynbuf(AVFormatContext *s)
|
|
{
|
|
MatroskaMuxContext *mkv = s->priv_data;
|
|
int bufsize;
|
|
uint8_t *dyn_buf;
|
|
|
|
if (!mkv->dyn_bc)
|
|
return;
|
|
|
|
bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
|
|
avio_write(s->pb, dyn_buf, bufsize);
|
|
av_free(dyn_buf);
|
|
mkv->dyn_bc = NULL;
|
|
}
|
|
|
|
static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
MatroskaMuxContext *mkv = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
|
|
int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
|
|
int duration = pkt->duration;
|
|
int ret;
|
|
int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
|
|
|
|
if (ts == AV_NOPTS_VALUE) {
|
|
av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (!s->pb->seekable) {
|
|
if (!mkv->dyn_bc)
|
|
avio_open_dyn_buf(&mkv->dyn_bc);
|
|
pb = mkv->dyn_bc;
|
|
}
|
|
|
|
if (!mkv->cluster_pos) {
|
|
mkv->cluster_pos = avio_tell(s->pb);
|
|
mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
|
|
put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
|
|
mkv->cluster_pts = FFMAX(0, ts);
|
|
}
|
|
|
|
if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
|
|
mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
|
|
} else if (codec->codec_id == CODEC_ID_SSA) {
|
|
duration = mkv_write_ass_blocks(s, pb, pkt);
|
|
} else if (codec->codec_id == CODEC_ID_SRT) {
|
|
duration = mkv_write_srt_blocks(s, pb, pkt);
|
|
} else {
|
|
ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(pkt->size));
|
|
duration = pkt->convergence_duration;
|
|
mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
|
|
put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
|
|
end_ebml_master(pb, blockgroup);
|
|
}
|
|
|
|
if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe) {
|
|
ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, ts, mkv->cluster_pos);
|
|
if (ret < 0) return ret;
|
|
}
|
|
|
|
mkv->duration = FFMAX(mkv->duration, ts + duration);
|
|
return 0;
|
|
}
|
|
|
|
static int mkv_copy_packet(MatroskaMuxContext *mkv, const AVPacket *pkt)
|
|
{
|
|
uint8_t *data = mkv->cur_audio_pkt.data;
|
|
mkv->cur_audio_pkt = *pkt;
|
|
mkv->cur_audio_pkt.data = av_fast_realloc(data, &mkv->audio_buffer_size, pkt->size);
|
|
if (!mkv->cur_audio_pkt.data)
|
|
return AVERROR(ENOMEM);
|
|
|
|
memcpy(mkv->cur_audio_pkt.data, pkt->data, pkt->size);
|
|
mkv->cur_audio_pkt.size = pkt->size;
|
|
return 0;
|
|
}
|
|
|
|
static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
MatroskaMuxContext *mkv = s->priv_data;
|
|
AVIOContext *pb = s->pb->seekable ? s->pb : mkv->dyn_bc;
|
|
AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
|
|
int ret, keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
|
|
int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
|
|
int cluster_size = avio_tell(pb) - (s->pb->seekable ? mkv->cluster_pos : 0);
|
|
|
|
// start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
|
|
// after 4k and on a keyframe
|
|
if (mkv->cluster_pos &&
|
|
((!s->pb->seekable && (cluster_size > 32*1024 || ts > mkv->cluster_pts + 1000))
|
|
|| cluster_size > 5*1024*1024 || ts > mkv->cluster_pts + 5000
|
|
|| (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe && cluster_size > 4*1024))) {
|
|
av_log(s, AV_LOG_DEBUG, "Starting new cluster at offset %" PRIu64
|
|
" bytes, pts %" PRIu64 "\n", avio_tell(pb), ts);
|
|
end_ebml_master(pb, mkv->cluster);
|
|
mkv->cluster_pos = 0;
|
|
if (mkv->dyn_bc)
|
|
mkv_flush_dynbuf(s);
|
|
}
|
|
|
|
// check if we have an audio packet cached
|
|
if (mkv->cur_audio_pkt.size > 0) {
|
|
ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
|
|
mkv->cur_audio_pkt.size = 0;
|
|
if (ret < 0) {
|
|
av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
// buffer an audio packet to ensure the packet containing the video
|
|
// keyframe's timecode is contained in the same cluster for WebM
|
|
if (codec->codec_type == AVMEDIA_TYPE_AUDIO)
|
|
ret = mkv_copy_packet(mkv, pkt);
|
|
else
|
|
ret = mkv_write_packet_internal(s, pkt);
|
|
return ret;
|
|
}
|
|
|
|
static int mkv_write_trailer(AVFormatContext *s)
|
|
{
|
|
MatroskaMuxContext *mkv = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int64_t currentpos, cuespos;
|
|
int ret;
|
|
|
|
// check if we have an audio packet cached
|
|
if (mkv->cur_audio_pkt.size > 0) {
|
|
ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
|
|
mkv->cur_audio_pkt.size = 0;
|
|
if (ret < 0) {
|
|
av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (mkv->dyn_bc) {
|
|
end_ebml_master(mkv->dyn_bc, mkv->cluster);
|
|
mkv_flush_dynbuf(s);
|
|
} else if (mkv->cluster_pos) {
|
|
end_ebml_master(pb, mkv->cluster);
|
|
}
|
|
|
|
if (pb->seekable) {
|
|
if (mkv->cues->num_entries) {
|
|
cuespos = mkv_write_cues(pb, mkv->cues, s->nb_streams);
|
|
|
|
ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES, cuespos);
|
|
if (ret < 0) return ret;
|
|
}
|
|
|
|
mkv_write_seekhead(pb, mkv->main_seekhead);
|
|
|
|
// update the duration
|
|
av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
|
|
currentpos = avio_tell(pb);
|
|
avio_seek(pb, mkv->duration_offset, SEEK_SET);
|
|
put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
|
|
|
|
avio_seek(pb, currentpos, SEEK_SET);
|
|
}
|
|
|
|
end_ebml_master(pb, mkv->segment);
|
|
av_free(mkv->tracks);
|
|
av_freep(&mkv->cues->entries);
|
|
av_freep(&mkv->cues);
|
|
av_destruct_packet(&mkv->cur_audio_pkt);
|
|
avio_flush(pb);
|
|
return 0;
|
|
}
|
|
|
|
static int mkv_query_codec(enum CodecID codec_id, int std_compliance)
|
|
{
|
|
int i;
|
|
for (i = 0; ff_mkv_codec_tags[i].id != CODEC_ID_NONE; i++)
|
|
if (ff_mkv_codec_tags[i].id == codec_id)
|
|
return 1;
|
|
|
|
if (std_compliance < FF_COMPLIANCE_NORMAL) { // mkv theoretically supports any
|
|
enum AVMediaType type = avcodec_get_type(codec_id); // video/audio through VFW/ACM
|
|
if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if CONFIG_MATROSKA_MUXER
|
|
AVOutputFormat ff_matroska_muxer = {
|
|
.name = "matroska",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Matroska file format"),
|
|
.mime_type = "video/x-matroska",
|
|
.extensions = "mkv",
|
|
.priv_data_size = sizeof(MatroskaMuxContext),
|
|
.audio_codec = CODEC_ID_MP2,
|
|
.video_codec = CODEC_ID_MPEG4,
|
|
.write_header = mkv_write_header,
|
|
.write_packet = mkv_write_packet,
|
|
.write_trailer = mkv_write_trailer,
|
|
.flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
|
|
.codec_tag = (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, 0},
|
|
.subtitle_codec = CODEC_ID_SSA,
|
|
.query_codec = mkv_query_codec,
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_WEBM_MUXER
|
|
AVOutputFormat ff_webm_muxer = {
|
|
.name = "webm",
|
|
.long_name = NULL_IF_CONFIG_SMALL("WebM file format"),
|
|
.mime_type = "video/webm",
|
|
.extensions = "webm",
|
|
.priv_data_size = sizeof(MatroskaMuxContext),
|
|
.audio_codec = CODEC_ID_VORBIS,
|
|
.video_codec = CODEC_ID_VP8,
|
|
.write_header = mkv_write_header,
|
|
.write_packet = mkv_write_packet,
|
|
.write_trailer = mkv_write_trailer,
|
|
.flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT,
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_MATROSKA_AUDIO_MUXER
|
|
AVOutputFormat ff_matroska_audio_muxer = {
|
|
.name = "matroska",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Matroska file format"),
|
|
.mime_type = "audio/x-matroska",
|
|
.extensions = "mka",
|
|
.priv_data_size = sizeof(MatroskaMuxContext),
|
|
.audio_codec = CODEC_ID_MP2,
|
|
.video_codec = CODEC_ID_NONE,
|
|
.write_header = mkv_write_header,
|
|
.write_packet = mkv_write_packet,
|
|
.write_trailer = mkv_write_trailer,
|
|
.flags = AVFMT_GLOBALHEADER,
|
|
.codec_tag = (const AVCodecTag* const []){ff_codec_wav_tags, 0},
|
|
};
|
|
#endif
|