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Sounds are loaded into memory on first use, using the SoundLoader interface to support format conversion. Sounds are retained in memory to avoid reloading every time a sound is played. This deduplicates WAV header parsing between NewGRF and baseset sounds, and will allow different audio formats to be supported.
37 lines
1.6 KiB
C++
37 lines
1.6 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file mixer.h Functions to mix sound samples. */
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#ifndef MIXER_H
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#define MIXER_H
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struct MixerChannel;
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/**
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* Type of callback functions for supplying PCM music.
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* A music decoder/renderer implements this function and installs it with MxSetMusicSource, which also returns the sample rate used.
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* @param buffer Pointer to interleaved 2-channel signed 16 bit PCM data buffer, guaranteed to be 0-initialized.
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* @param samples number of samples that must be filled into \c buffer.
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*/
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typedef void(*MxStreamCallback)(int16_t *buffer, size_t samples);
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bool MxInitialize(uint rate);
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void MxMixSamples(void *buffer, uint samples);
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MixerChannel *MxAllocateChannel();
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void MxSetChannelRawSrc(MixerChannel *mc, const std::shared_ptr<std::vector<uint8_t>> &mem, uint rate, bool is16bit);
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void MxSetChannelVolume(MixerChannel *mc, uint volume, float pan);
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void MxActivateChannel(MixerChannel*);
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void MxCloseAllChannels();
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uint32_t MxSetMusicSource(MxStreamCallback music_callback);
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void SetEffectVolume(uint8_t volume);
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#endif /* MIXER_H */
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