| /* |
| * raw FLAC muxer |
| * Copyright (C) 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 "libavcodec/bytestream.h" |
| #include "avformat.h" |
| #include "flacenc.h" |
| |
| int ff_flac_write_header(AVIOContext *pb, AVCodecContext *codec, |
| int last_block) |
| { |
| uint8_t header[8] = { |
| 0x66, 0x4C, 0x61, 0x43, 0x00, 0x00, 0x00, 0x22 |
| }; |
| uint8_t *streaminfo; |
| enum FLACExtradataFormat format; |
| |
| header[4] = last_block ? 0x80 : 0x00; |
| 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) { |
| avio_write(pb, header, 8); |
| } |
| |
| /* write STREAMINFO or full header */ |
| avio_write(pb, codec->extradata, codec->extradata_size); |
| |
| return 0; |
| } |