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https://github.com/elasota/Aerofoil.git
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109 lines
2.7 KiB
C++
109 lines
2.7 KiB
C++
#include "GpAudioChannelXAudio2.h"
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#include "GpAudioDriverXAudio2.h"
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#include "IGpAudioChannelCallbacks.h"
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#include <stdlib.h>
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#include <new>
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GpAudioChannelXAudio2 *GpAudioChannelXAudio2::Create(GpAudioDriverXAudio2 *driver)
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{
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void *storage = malloc(sizeof(GpAudioChannelXAudio2));
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if (!storage)
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return nullptr;
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GpAudioChannelXAudio2 *channel = new (storage) GpAudioChannelXAudio2(driver);
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if (!channel->Init())
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{
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channel->Destroy();
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return nullptr;
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}
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return channel;
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}
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bool GpAudioChannelXAudio2::Init()
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{
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const unsigned int sampleRate = m_driver->GetRealSampleRate();
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IXAudio2 *const xa2 = m_driver->GetXA2();
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WAVEFORMATEX format;
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ZeroMemory(&format, sizeof(format));
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format.wFormatTag = WAVE_FORMAT_PCM;
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format.nChannels = 1;
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format.nSamplesPerSec = sampleRate;
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format.wBitsPerSample = 8;
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format.nBlockAlign = format.nChannels * format.wBitsPerSample / 8;
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format.nAvgBytesPerSec = format.nBlockAlign * format.nSamplesPerSec;
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XAUDIO2_SEND_DESCRIPTOR sendsList[1];
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sendsList[0].Flags = 0;
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sendsList[0].pOutputVoice = m_driver->GetMasteringVoice();
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XAUDIO2_VOICE_SENDS sends;
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sends.pSends = sendsList;
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sends.SendCount = sizeof(sendsList) / sizeof(sendsList[0]);
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XAUDIO2_VOICE_DETAILS dets;
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m_driver->GetMasteringVoice()->GetVoiceDetails(&dets);
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HRESULT hr = xa2->CreateSourceVoice(&m_sourceVoice, &format, XAUDIO2_VOICE_NOPITCH | XAUDIO2_VOICE_NOSRC, 1.0f, &m_xAudioCallbacks, nullptr, nullptr);
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if (hr != S_OK)
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return false;
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return true;
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}
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void GpAudioChannelXAudio2::SetAudioChannelContext(IGpAudioChannelCallbacks *callbacks)
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{
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m_contextCallbacks = callbacks;
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}
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void GpAudioChannelXAudio2::PostBuffer(const void *buffer, size_t bufferSize)
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{
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XAUDIO2_BUFFER xa2Buffer;
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xa2Buffer.Flags = 0;
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xa2Buffer.AudioBytes = static_cast<UINT32>(bufferSize);
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xa2Buffer.pAudioData = static_cast<const BYTE*>(buffer);
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xa2Buffer.PlayBegin = 0;
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xa2Buffer.PlayLength = 0;
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xa2Buffer.LoopBegin = 0;
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xa2Buffer.LoopLength = 0;
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xa2Buffer.LoopCount = 0;
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xa2Buffer.pContext = nullptr;
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m_sourceVoice->SubmitSourceBuffer(&xa2Buffer, nullptr);
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if (m_voiceState == VoiceState_Idle)
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{
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m_voiceState = VoiceState_Active;
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m_sourceVoice->Start(0, 0);
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}
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}
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void GpAudioChannelXAudio2::Destroy()
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{
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this->~GpAudioChannelXAudio2();
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free(this);
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}
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void GpAudioChannelXAudio2::OnBufferEnd()
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{
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if (m_contextCallbacks)
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m_contextCallbacks->NotifyBufferFinished();
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}
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GpAudioChannelXAudio2::GpAudioChannelXAudio2(GpAudioDriverXAudio2 *driver)
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: m_driver(driver)
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, m_xAudioCallbacks(this)
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, m_sourceVoice(nullptr)
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, m_contextCallbacks(nullptr)
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, m_voiceState(VoiceState_Idle)
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{
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}
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GpAudioChannelXAudio2::~GpAudioChannelXAudio2()
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{
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if (m_sourceVoice)
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m_sourceVoice->DestroyVoice();
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}
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