48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
/*
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* Copyright 2003-2021 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "OpusHead.hxx"
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#include "util/ByteOrder.hxx"
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#include <cstdint>
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struct OpusHead {
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char signature[8];
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uint8_t version, channels;
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uint16_t pre_skip;
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uint32_t sample_rate;
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uint16_t output_gain;
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uint8_t channel_mapping;
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};
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bool
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ScanOpusHeader(const void *data, size_t size, unsigned &channels_r,
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signed &output_gain_r, unsigned &pre_skip_r)
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{
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const auto *h = (const OpusHead *)data;
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if (size < 19 || (h->version & 0xf0) != 0)
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return false;
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output_gain_r = FromLE16S(h->output_gain);
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channels_r = h->channels;
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pre_skip_r = FromLE16(h->pre_skip);
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return true;
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}
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