1/*
2 * raw FLAC muxer
3 * Copyright (C) 2009 Justin Ruggles
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22#include "libavcodec/flac.h"
23#include "libavcodec/bytestream.h"
24#include "avformat.h"
25#include "flacenc.h"
26
27int ff_flac_write_header(ByteIOContext *pb, AVCodecContext *codec,
28                         int last_block)
29{
30    uint8_t header[8] = {
31        0x66, 0x4C, 0x61, 0x43, 0x00, 0x00, 0x00, 0x22
32    };
33    uint8_t *streaminfo;
34    enum FLACExtradataFormat format;
35
36    header[4] = last_block ? 0x80 : 0x00;
37    if (!ff_flac_is_extradata_valid(codec, &format, &streaminfo))
38        return -1;
39
40    /* write "fLaC" stream marker and first metadata block header if needed */
41    if (format == FLAC_EXTRADATA_FORMAT_STREAMINFO) {
42        put_buffer(pb, header, 8);
43    }
44
45    /* write STREAMINFO or full header */
46    put_buffer(pb, codec->extradata, codec->extradata_size);
47
48    return 0;
49}
50