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/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file mixer.h Functions to mix sound samples. */
#ifndef MIXER_H
#define MIXER_H
struct MixerChannel;
/**
* Type of callback functions for supplying PCM music.
* A music decoder/renderer implements this function and installs it with MxSetMusicSource, which also returns the sample rate used.
* @param buffer Pointer to interleaved 2-channel signed 16 bit PCM data buffer, guaranteed to be 0-initialized.
* @param samples number of samples that must be filled into \c buffer.
*/
typedef void(*MxStreamCallback)(int16 *buffer, size_t samples);
bool MxInitialize(uint rate);
void MxMixSamples(void *buffer, uint samples);
MixerChannel *MxAllocateChannel();
void MxSetChannelRawSrc(MixerChannel *mc, int8 *mem, size_t size, uint rate, bool is16bit);
void MxSetChannelVolume(MixerChannel *mc, uint volume, float pan);
void MxActivateChannel(MixerChannel*);
uint32 MxSetMusicSource(MxStreamCallback music_callback);
#endif /* MIXER_H */
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