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