forked from dolphin-emu/dolphin
100 lines
1.8 KiB
C++
100 lines
1.8 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#include <functional>
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#include "Common.h"
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#include "Thread.h"
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#include "PulseAudioStream.h"
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namespace
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{
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const size_t BUFFER_SAMPLES = 512;
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const size_t CHANNEL_COUNT = 2;
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const size_t BUFFER_SIZE = BUFFER_SAMPLES * CHANNEL_COUNT;
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}
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PulseAudio::PulseAudio(CMixer *mixer)
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: SoundStream(mixer)
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, mix_buffer(BUFFER_SIZE)
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, thread()
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, run_thread()
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, pa()
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{}
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bool PulseAudio::Start()
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{
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run_thread = true;
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thread = std::thread(std::mem_fun(&PulseAudio::SoundLoop), this);
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return true;
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}
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void PulseAudio::Stop()
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{
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run_thread = false;
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thread.join();
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}
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void PulseAudio::Update()
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{
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// don't need to do anything here.
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}
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// Called on audio thread.
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void PulseAudio::SoundLoop()
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{
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Common::SetCurrentThreadName("Audio thread - pulse");
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if (PulseInit())
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{
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while (run_thread)
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{
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m_mixer->Mix(&mix_buffer[0], mix_buffer.size() / CHANNEL_COUNT);
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Write(&mix_buffer[0], mix_buffer.size() * sizeof(s16));
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}
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PulseShutdown();
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}
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}
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bool PulseAudio::PulseInit()
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{
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pa_sample_spec ss = {};
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ss.format = PA_SAMPLE_S16LE;
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ss.channels = 2;
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ss.rate = m_mixer->GetSampleRate();
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int error;
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pa = pa_simple_new(nullptr, "dolphin-emu", PA_STREAM_PLAYBACK,
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nullptr, "audio", &ss, nullptr, nullptr, &error);
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if (!pa)
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{
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ERROR_LOG(AUDIO, "PulseAudio failed to initialize: %s",
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pa_strerror(error));
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return false;
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}
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else
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{
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NOTICE_LOG(AUDIO, "Pulse successfully initialized.");
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return true;
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}
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}
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void PulseAudio::PulseShutdown()
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{
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pa_simple_free(pa);
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}
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void PulseAudio::Write(const void *data, size_t length)
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{
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int error;
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if (pa_simple_write(pa, data, length, &error) < 0)
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{
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ERROR_LOG(AUDIO, "PulseAudio failed to write data: %s",
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pa_strerror(error));
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}
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}
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