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,