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Share the function to write a raw FLAC header and use it in the Matroska

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muxer.

Originally committed as revision 17606 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2009-02-26 02:41:53 +00:00
parent faec0eba8b
commit 2578326f13
4 changed files with 42 additions and 27 deletions
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4
libavformat/Makefile
View File

@ -83,9 +83,9 @@ OBJS-$(CONFIG_ISS_DEMUXER) += iss.o
OBJS-$(CONFIG_LMLM4_DEMUXER) += lmlm4.o
OBJS-$(CONFIG_M4V_DEMUXER) += raw.o
OBJS-$(CONFIG_M4V_MUXER) += raw.o
OBJS-$(CONFIG_MATROSKA_AUDIO_MUXER) += matroskaenc.o matroska.o riff.o isom.o avc.o
OBJS-$(CONFIG_MATROSKA_AUDIO_MUXER) += matroskaenc.o matroska.o riff.o isom.o avc.o flacenc.o
OBJS-$(CONFIG_MATROSKA_DEMUXER) += matroskadec.o matroska.o riff.o isom.o
OBJS-$(CONFIG_MATROSKA_MUXER) += matroskaenc.o matroska.o riff.o isom.o avc.o
OBJS-$(CONFIG_MATROSKA_MUXER) += matroskaenc.o matroska.o riff.o isom.o avc.o flacenc.o
OBJS-$(CONFIG_MJPEG_DEMUXER) += raw.o
OBJS-$(CONFIG_MJPEG_MUXER) += raw.o
OBJS-$(CONFIG_MLP_DEMUXER) += raw.o id3v2.o

13
libavformat/flacenc.c
View File

@ -21,13 +21,13 @@
#include "libavcodec/flac.h"
#include "avformat.h"
#include "flacenc.h"
static int flac_write_header(struct AVFormatContext *s)
int ff_flac_write_header(ByteIOContext *pb, AVCodecContext *codec)
{
static const uint8_t header[8] = {
0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
};
AVCodecContext *codec = s->streams[0]->codec;
uint8_t *streaminfo;
enum FLACExtradataFormat format;
@ -36,15 +36,20 @@ static int flac_write_header(struct AVFormatContext *s)
/* write "fLaC" stream marker and first metadata block header if needed */
if (format == FLAC_EXTRADATA_FORMAT_STREAMINFO) {
put_buffer(s->pb, header, 8);
put_buffer(pb, header, 8);
}
/* write STREAMINFO or full header */
put_buffer(s->pb, codec->extradata, codec->extradata_size);
put_buffer(pb, codec->extradata, codec->extradata_size);
return 0;
}
static int flac_write_header(struct AVFormatContext *s)
{
return ff_flac_write_header(s->pb, s->streams[0]->codec);
}
static int flac_write_trailer(struct AVFormatContext *s)
{
ByteIOContext *pb = s->pb;

29
libavformat/flacenc.h Normal file
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@ -0,0 +1,29 @@
/*
* raw FLAC muxer
* Copyright (C) 2009 Justin Ruggles
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_FLACENC_H
#define AVFORMAT_FLACENC_H
#include "avformat.h"
int ff_flac_write_header(ByteIOContext *pb, AVCodecContext *codec);
#endif /* AVFORMAT_FLACENC_H */

23
libavformat/matroskaenc.c
View File

@ -24,11 +24,11 @@
#include "isom.h"
#include "matroska.h"
#include "avc.h"
#include "flacenc.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/md5.h"
#include "libavcodec/xiph.h"
#include "libavcodec/mpeg4audio.h"
#include "libavcodec/flac.h"
typedef struct ebml_master {
int64_t pos; ///< absolute offset in the file where the master's elements start
@ -421,25 +421,6 @@ static int put_xiph_codecpriv(AVFormatContext *s, ByteIOContext *pb, AVCodecCont
return 0;
}
static int put_flac_codecpriv(AVFormatContext *s, ByteIOContext *pb, AVCodecContext *codec)
{
uint8_t *streaminfo;
enum FLACExtradataFormat format;
if (!ff_flac_is_extradata_valid(codec, &format, &streaminfo)) {
av_log(s, AV_LOG_ERROR, "Invalid FLAC extradata\n");
return -1;
}
if (format == FLAC_EXTRADATA_FORMAT_STREAMINFO) {
// only the streaminfo packet
put_buffer(pb, "fLaC", 4);
put_byte(pb, 0x80);
put_be24(pb, FLAC_STREAMINFO_SIZE);
}
put_buffer(pb, codec->extradata, codec->extradata_size);
return 0;
}
static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate)
{
int sri;
@ -481,7 +462,7 @@ static int mkv_write_codecprivate(AVFormatContext *s, ByteIOContext *pb, AVCodec
if (codec->codec_id == CODEC_ID_VORBIS || codec->codec_id == CODEC_ID_THEORA)
ret = put_xiph_codecpriv(s, dyn_cp, codec);
else if (codec->codec_id == CODEC_ID_FLAC)
ret = put_flac_codecpriv(s, dyn_cp, codec);
ret = ff_flac_write_header(dyn_cp, codec);
else if (codec->codec_id == CODEC_ID_H264)
ret = ff_isom_write_avcc(dyn_cp, codec->extradata, codec->extradata_size);
else if (codec->extradata_size)