dolphin/Source/Core/AudioCommon/OpenALStream.h
2017-04-12 13:15:00 +01:00

88 lines
2.4 KiB
C++

// Copyright 2008 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#pragma once
#include <thread>
#include "AudioCommon/SoundStream.h"
#include "Common/Event.h"
#include "Core/Core.h"
#include "Core/HW/AudioInterface.h"
#include "Core/HW/SystemTimers.h"
#if defined HAVE_OPENAL && HAVE_OPENAL
#ifdef _WIN32
#include <OpenAL/include/al.h>
#include <OpenAL/include/alc.h>
#include <OpenAL/include/alext.h>
#elif defined __APPLE__
#include <OpenAL/al.h>
#include <OpenAL/alc.h>
#else
#include <AL/al.h>
#include <AL/alc.h>
#include <AL/alext.h>
#endif
#define SFX_MAX_SOURCE 1
#define OAL_MAX_BUFFERS 32
#define OAL_MAX_SAMPLES 256
#define STEREO_CHANNELS 2
#define SURROUND_CHANNELS 6 // number of channels in surround mode
#define SIZE_SHORT 2
#define SIZE_INT32 4
#define SIZE_FLOAT 4 // size of a float in bytes
#define FRAME_STEREO_SHORT STEREO_CHANNELS* SIZE_SHORT
#define FRAME_STEREO_FLOAT STEREO_CHANNELS* SIZE_FLOAT
#define FRAME_STEREO_INT32 STEREO_CHANNELS* SIZE_INT32
#define FRAME_SURROUND_FLOAT SURROUND_CHANNELS* SIZE_FLOAT
#define FRAME_SURROUND_SHORT SURROUND_CHANNELS* SIZE_SHORT
#define FRAME_SURROUND_INT32 SURROUND_CHANNELS* SIZE_INT32
#endif
#if defined(__APPLE__)
// OS X does not have the alext AL_FORMAT_STEREO_FLOAT32, AL_FORMAT_STEREO32,
// AL_FORMAT_51CHN32 and AL_FORMAT_51CHN16 yet.
#define AL_FORMAT_STEREO_FLOAT32 0
#define AL_FORMAT_STEREO32 0
#define AL_FORMAT_51CHN32 0
#define AL_FORMAT_51CHN16 0
#elif defined(_WIN32)
// Only X-Fi on Windows supports the alext AL_FORMAT_STEREO32 alext for now,
// but it is not documented or in "OpenAL/include/al.h".
#define AL_FORMAT_STEREO32 0x1203
#else
#define AL_FORMAT_STEREO32 0
#endif
class OpenALStream final : public SoundStream
{
#if defined HAVE_OPENAL && HAVE_OPENAL
public:
OpenALStream() : uiSource(0) {}
bool Start() override;
void SoundLoop() override;
void SetVolume(int volume) override;
void Stop() override;
void Clear(bool mute) override;
void Update() override;
static bool isValid() { return true; }
private:
std::thread thread;
Common::Flag m_run_thread;
Common::Event soundSyncEvent;
short realtimeBuffer[OAL_MAX_SAMPLES * STEREO_CHANNELS];
float sampleBuffer[OAL_MAX_SAMPLES * SURROUND_CHANNELS * OAL_MAX_BUFFERS];
ALuint uiBuffers[OAL_MAX_BUFFERS];
ALuint uiSource;
ALfloat fVolume;
u8 numBuffers;
#endif // HAVE_OPENAL
};