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63 lines
2.0 KiB
63 lines
2.0 KiB
/* |
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* raw FLAC muxer |
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* Copyright (C) 2009 Justin Ruggles |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/channel_layout.h" |
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#include "libavcodec/flac.h" |
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#include "libavcodec/bytestream.h" |
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#include "avformat.h" |
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#include "flacenc.h" |
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int ff_flac_write_header(AVIOContext *pb, AVCodecContext *codec, |
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int last_block) |
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{ |
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uint8_t header[8] = { |
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0x66, 0x4C, 0x61, 0x43, 0x00, 0x00, 0x00, 0x22 |
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}; |
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uint8_t *streaminfo; |
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enum FLACExtradataFormat format; |
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header[4] = last_block ? 0x80 : 0x00; |
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if (!avpriv_flac_is_extradata_valid(codec, &format, &streaminfo)) |
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return -1; |
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/* write "fLaC" stream marker and first metadata block header */ |
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avio_write(pb, header, 8); |
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/* write STREAMINFO */ |
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avio_write(pb, streaminfo, FLAC_STREAMINFO_SIZE); |
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return 0; |
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} |
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int ff_flac_is_native_layout(uint64_t channel_layout) |
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{ |
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if (channel_layout == AV_CH_LAYOUT_MONO || |
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channel_layout == AV_CH_LAYOUT_STEREO || |
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channel_layout == AV_CH_LAYOUT_SURROUND || |
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channel_layout == AV_CH_LAYOUT_QUAD || |
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channel_layout == AV_CH_LAYOUT_5POINT0 || |
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channel_layout == AV_CH_LAYOUT_5POINT1 || |
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channel_layout == AV_CH_LAYOUT_6POINT1 || |
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channel_layout == AV_CH_LAYOUT_7POINT1) |
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return 1; |
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return 0; |
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}
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