45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
/*
|
|
* Copyright (C) 2003-2012 The Music Player Daemon Project
|
|
* http://www.musicpd.org
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "OpusHead.hxx"
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
struct OpusHead {
|
|
char signature[8];
|
|
uint8_t version, channels;
|
|
uint16_t pre_skip;
|
|
uint32_t sample_rate;
|
|
uint16_t output_gain;
|
|
uint8_t channel_mapping;
|
|
};
|
|
|
|
bool
|
|
ScanOpusHeader(const void *data, size_t size, unsigned &channels_r)
|
|
{
|
|
const OpusHead *h = (const OpusHead *)data;
|
|
if (size < 19 || (h->version & 0xf0) != 0)
|
|
return false;
|
|
|
|
channels_r = h->channels;
|
|
return true;
|
|
}
|