mirror of https://github.com/bsnes-emu/bsnes.git
74 lines
1.6 KiB
C++
74 lines
1.6 KiB
C++
#include <emulator/emulator.hpp>
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namespace Emulator {
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#include "stream.cpp"
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Audio audio;
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Audio::~Audio() {
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reset(nullptr);
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}
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auto Audio::reset(Interface* interface) -> void {
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this->interface = interface;
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streams.reset();
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channels = 0;
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}
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auto Audio::setFrequency(double frequency) -> void {
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this->frequency = frequency;
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for(auto& stream : streams) {
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stream->setFrequency(stream->inputFrequency, frequency);
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}
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}
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auto Audio::setVolume(double volume) -> void {
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this->volume = volume;
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}
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auto Audio::setBalance(double balance) -> void {
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this->balance = balance;
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}
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auto Audio::createStream(uint channels, double frequency) -> shared_pointer<Stream> {
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this->channels = max(this->channels, channels);
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shared_pointer<Stream> stream = new Stream;
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stream->reset(channels, frequency, this->frequency);
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streams.append(stream);
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return stream;
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}
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auto Audio::process() -> void {
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while(true) {
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for(auto& stream : streams) {
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if(!stream->pending()) return;
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}
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double samples[channels];
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for(auto& sample : samples) sample = 0.0;
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for(auto& stream : streams) {
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double buffer[channels];
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uint length = stream->read(buffer), offset = 0;
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for(auto& sample : samples) {
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sample += buffer[offset];
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if(++offset >= length) offset = 0;
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}
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}
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for(auto c : range(channels)) {
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samples[c] = max(-1.0, min(+1.0, samples[c] * volume));
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}
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if(channels == 2) {
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if(balance < 0.0) samples[1] *= 1.0 + balance;
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if(balance > 0.0) samples[0] *= 1.0 - balance;
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}
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platform->audioSample(samples, channels);
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}
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}
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}
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