3
* Copyright (c) 2006-2009 Justin Ruggles
5
* This file is part of FFmpeg.
7
* FFmpeg is free software; you can redistribute it and/or
8
* modify it under the terms of the GNU Lesser General Public
9
* License as published by the Free Software Foundation; either
10
* version 2.1 of the License, or (at your option) any later version.
12
* FFmpeg is distributed in the hope that it will be useful,
13
* but WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15
* Lesser General Public License for more details.
17
* You should have received a copy of the GNU Lesser General Public
18
* License along with FFmpeg; if not, write to the Free Software
19
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22
#include "libavcodec/flac.h"
26
int ff_flac_write_header(ByteIOContext *pb, AVCodecContext *codec)
28
static const uint8_t header[8] = {
29
0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
32
enum FLACExtradataFormat format;
34
if (!ff_flac_is_extradata_valid(codec, &format, &streaminfo))
37
/* write "fLaC" stream marker and first metadata block header if needed */
38
if (format == FLAC_EXTRADATA_FORMAT_STREAMINFO) {
39
put_buffer(pb, header, 8);
42
/* write STREAMINFO or full header */
43
put_buffer(pb, codec->extradata, codec->extradata_size);
48
static int flac_write_header(struct AVFormatContext *s)
50
return ff_flac_write_header(s->pb, s->streams[0]->codec);
53
static int flac_write_trailer(struct AVFormatContext *s)
55
ByteIOContext *pb = s->pb;
57
enum FLACExtradataFormat format;
60
if (!ff_flac_is_extradata_valid(s->streams[0]->codec, &format, &streaminfo))
63
if (!url_is_streamed(pb)) {
64
/* rewrite the STREAMINFO header block data */
65
file_size = url_ftell(pb);
66
url_fseek(pb, 8, SEEK_SET);
67
put_buffer(pb, streaminfo, FLAC_STREAMINFO_SIZE);
68
url_fseek(pb, file_size, SEEK_SET);
71
av_log(s, AV_LOG_WARNING, "unable to rewrite FLAC header.\n");
76
static int flac_write_packet(struct AVFormatContext *s, AVPacket *pkt)
78
put_buffer(s->pb, pkt->data, pkt->size);
79
put_flush_packet(s->pb);
83
AVOutputFormat flac_muxer = {
85
NULL_IF_CONFIG_SMALL("raw FLAC"),
94
.flags= AVFMT_NOTIMESTAMPS,