dolphin/Source/Core/AudioCommon/XAudio2Stream.cpp

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// Copyright 2010 Dolphin Emulator Project
2015-05-17 23:08:10 +00:00
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <xaudio2.h>
#include "AudioCommon/AudioCommon.h"
#include "AudioCommon/XAudio2Stream.h"
#include "Common/Event.h"
#ifndef XAUDIO2_DLL
#error You are building this module against the wrong version of DirectX. You probably need to remove DXSDK_DIR from your include path.
#endif
struct StreamingVoiceContext : public IXAudio2VoiceCallback
{
private:
CMixer* const m_mixer;
Common::Event& m_sound_sync_event;
IXAudio2SourceVoice* m_source_voice;
std::unique_ptr<BYTE[]> xaudio_buffer;
void SubmitBuffer(PBYTE buf_data);
public:
StreamingVoiceContext(IXAudio2 *pXAudio2, CMixer *pMixer, Common::Event& pSyncEvent);
~StreamingVoiceContext();
void StreamingVoiceContext::Stop();
void StreamingVoiceContext::Play();
STDMETHOD_(void, OnVoiceError) (THIS_ void* pBufferContext, HRESULT Error) {}
STDMETHOD_(void, OnVoiceProcessingPassStart) (UINT32) {}
STDMETHOD_(void, OnVoiceProcessingPassEnd) () {}
STDMETHOD_(void, OnBufferStart) (void*) {}
STDMETHOD_(void, OnLoopEnd) (void*) {}
STDMETHOD_(void, OnStreamEnd) () {}
STDMETHOD_(void, OnBufferEnd) (void* context);
};
const int NUM_BUFFERS = 3;
const int SAMPLES_PER_BUFFER = 96;
const int NUM_CHANNELS = 2;
const int BUFFER_SIZE = SAMPLES_PER_BUFFER * NUM_CHANNELS;
const int BUFFER_SIZE_BYTES = BUFFER_SIZE * sizeof(s16);
void StreamingVoiceContext::SubmitBuffer(PBYTE buf_data)
{
XAUDIO2_BUFFER buf = {};
buf.AudioBytes = BUFFER_SIZE_BYTES;
buf.pContext = buf_data;
buf.pAudioData = buf_data;
m_source_voice->SubmitSourceBuffer(&buf);
}
StreamingVoiceContext::StreamingVoiceContext(IXAudio2 *pXAudio2, CMixer *pMixer, Common::Event& pSyncEvent)
: m_mixer(pMixer)
, m_sound_sync_event(pSyncEvent)
, xaudio_buffer(new BYTE[NUM_BUFFERS * BUFFER_SIZE_BYTES]())
{
WAVEFORMATEXTENSIBLE wfx = {};
wfx.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
wfx.Format.nSamplesPerSec = m_mixer->GetSampleRate();
wfx.Format.nChannels = 2;
wfx.Format.wBitsPerSample = 16;
wfx.Format.nBlockAlign = wfx.Format.nChannels*wfx.Format.wBitsPerSample / 8;
wfx.Format.nAvgBytesPerSec = wfx.Format.nSamplesPerSec * wfx.Format.nBlockAlign;
wfx.Format.cbSize = sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
wfx.Samples.wValidBitsPerSample = 16;
wfx.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
wfx.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
// create source voice
HRESULT hr;
if (FAILED(hr = pXAudio2->CreateSourceVoice(&m_source_voice, &wfx.Format, XAUDIO2_VOICE_NOSRC, 1.0f, this)))
{
PanicAlert("XAudio2 CreateSourceVoice failed: %#X", hr);
return;
}
m_source_voice->Start();
// start buffers with silence
for (int i = 0; i != NUM_BUFFERS; ++i)
SubmitBuffer(xaudio_buffer.get() + (i * BUFFER_SIZE_BYTES));
}
StreamingVoiceContext::~StreamingVoiceContext()
{
if (m_source_voice)
{
m_source_voice->Stop();
m_source_voice->DestroyVoice();
}
}
void StreamingVoiceContext::Stop()
{
if (m_source_voice)
m_source_voice->Stop();
}
void StreamingVoiceContext::Play()
{
if (m_source_voice)
m_source_voice->Start();
}
void StreamingVoiceContext::OnBufferEnd(void* context)
{
// buffer end callback; gets SAMPLES_PER_BUFFER samples for a new buffer
if (!m_source_voice || !context)
return;
//m_sound_sync_event->Wait(); // sync
//m_sound_sync_event->Spin(); // or tight sync
m_mixer->Mix(static_cast<short*>(context), SAMPLES_PER_BUFFER);
SubmitBuffer(static_cast<BYTE*>(context));
}
HMODULE XAudio2::m_xaudio2_dll = nullptr;
typedef decltype(&XAudio2Create) XAudio2Create_t;
void *XAudio2::PXAudio2Create = nullptr;
bool XAudio2::InitLibrary()
{
if (m_xaudio2_dll)
{
return true;
}
m_xaudio2_dll = ::LoadLibrary(XAUDIO2_DLL);
if (!m_xaudio2_dll)
{
return false;
}
if (!PXAudio2Create)
{
PXAudio2Create = (XAudio2Create_t)::GetProcAddress(m_xaudio2_dll, "XAudio2Create");
if (!PXAudio2Create)
{
::FreeLibrary(m_xaudio2_dll);
m_xaudio2_dll = nullptr;
return false;
}
}
return true;
}
XAudio2::XAudio2()
: m_mastering_voice(nullptr)
, m_volume(1.0f)
, m_cleanup_com(SUCCEEDED(CoInitializeEx(nullptr, COINIT_MULTITHREADED)))
{
}
XAudio2::~XAudio2()
{
Stop();
if (m_cleanup_com)
CoUninitialize();
}
bool XAudio2::Start()
{
HRESULT hr;
// callback doesn't seem to run on a specific CPU anyways
IXAudio2* xaudptr;
if (FAILED(hr = ((XAudio2Create_t)PXAudio2Create)(&xaudptr, 0, XAUDIO2_DEFAULT_PROCESSOR)))
{
PanicAlert("XAudio2 init failed: %#X", hr);
Stop();
return false;
}
m_xaudio2 = std::unique_ptr<IXAudio2, Releaser>(xaudptr);
// XAudio2 master voice
// XAUDIO2_DEFAULT_CHANNELS instead of 2 for expansion?
if (FAILED(hr = m_xaudio2->CreateMasteringVoice(&m_mastering_voice, 2, m_mixer->GetSampleRate())))
{
PanicAlert("XAudio2 master voice creation failed: %#X", hr);
Stop();
return false;
}
// Volume
m_mastering_voice->SetVolume(m_volume);
m_voice_context = std::unique_ptr<StreamingVoiceContext>
(new StreamingVoiceContext(m_xaudio2.get(), m_mixer.get(), m_sound_sync_event));
return true;
}
void XAudio2::SetVolume(int volume)
{
//linear 1- .01
m_volume = (float)volume / 100.f;
if (m_mastering_voice)
m_mastering_voice->SetVolume(m_volume);
}
void XAudio2::Clear(bool mute)
{
m_muted = mute;
if (m_voice_context)
{
if (m_muted)
m_voice_context->Stop();
else
m_voice_context->Play();
}
}
void XAudio2::Stop()
{
//m_sound_sync_event.Set();
m_voice_context.reset();
if (m_mastering_voice)
{
m_mastering_voice->DestroyVoice();
m_mastering_voice = nullptr;
}
m_xaudio2.reset(); // release interface
if (m_xaudio2_dll)
{
::FreeLibrary(m_xaudio2_dll);
m_xaudio2_dll = nullptr;
PXAudio2Create = nullptr;
}
}