mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-27 01:42:20 +00:00
96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/*
|
|
* raw FLAC muxer
|
|
* Copyright (c) 2006-2009 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
|
|
*/
|
|
|
|
#include "libavcodec/flac.h"
|
|
#include "avformat.h"
|
|
#include "flacenc.h"
|
|
|
|
int ff_flac_write_header(ByteIOContext *pb, AVCodecContext *codec)
|
|
{
|
|
static const uint8_t header[8] = {
|
|
0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
|
|
};
|
|
uint8_t *streaminfo;
|
|
enum FLACExtradataFormat format;
|
|
|
|
if (!ff_flac_is_extradata_valid(codec, &format, &streaminfo))
|
|
return -1;
|
|
|
|
/* write "fLaC" stream marker and first metadata block header if needed */
|
|
if (format == FLAC_EXTRADATA_FORMAT_STREAMINFO) {
|
|
put_buffer(pb, header, 8);
|
|
}
|
|
|
|
/* write STREAMINFO or full header */
|
|
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;
|
|
uint8_t *streaminfo;
|
|
enum FLACExtradataFormat format;
|
|
int64_t file_size;
|
|
|
|
if (!ff_flac_is_extradata_valid(s->streams[0]->codec, &format, &streaminfo))
|
|
return -1;
|
|
|
|
if (!url_is_streamed(pb)) {
|
|
/* rewrite the STREAMINFO header block data */
|
|
file_size = url_ftell(pb);
|
|
url_fseek(pb, 8, SEEK_SET);
|
|
put_buffer(pb, streaminfo, FLAC_STREAMINFO_SIZE);
|
|
url_fseek(pb, file_size, SEEK_SET);
|
|
put_flush_packet(pb);
|
|
} else {
|
|
av_log(s, AV_LOG_WARNING, "unable to rewrite FLAC header.\n");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int flac_write_packet(struct AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
put_buffer(s->pb, pkt->data, pkt->size);
|
|
put_flush_packet(s->pb);
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat flac_muxer = {
|
|
"flac",
|
|
NULL_IF_CONFIG_SMALL("raw FLAC"),
|
|
"audio/x-flac",
|
|
"flac",
|
|
0,
|
|
CODEC_ID_FLAC,
|
|
CODEC_ID_NONE,
|
|
flac_write_header,
|
|
flac_write_packet,
|
|
flac_write_trailer,
|
|
.flags= AVFMT_NOTIMESTAMPS,
|
|
};
|