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379 lines
12 KiB
C++
379 lines
12 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#ifdef _WIN32
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#include "AudioCommon/OpenALStream.h"
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#include <windows.h>
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#include <climits>
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#include <cstring>
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#include <thread>
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#include "Common/Logging/Log.h"
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#include "Common/MsgHandler.h"
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#include "Common/Thread.h"
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#include "Core/Config/MainSettings.h"
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static HMODULE s_openal_dll = nullptr;
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#define OPENAL_API_VISIT(X) \
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X(alBufferData) \
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X(alcCloseDevice) \
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X(alcCreateContext) \
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X(alcDestroyContext) \
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X(alcGetContextsDevice) \
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X(alcGetCurrentContext) \
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X(alcGetString) \
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X(alcIsExtensionPresent) \
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X(alcMakeContextCurrent) \
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X(alcOpenDevice) \
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X(alDeleteBuffers) \
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X(alDeleteSources) \
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X(alGenBuffers) \
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X(alGenSources) \
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X(alGetError) \
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X(alGetSourcei) \
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X(alGetString) \
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X(alIsExtensionPresent) \
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X(alSourcef) \
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X(alSourcei) \
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X(alSourcePlay) \
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X(alSourceQueueBuffers) \
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X(alSourceStop) \
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X(alSourceUnqueueBuffers)
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// Create func_t function pointer type and declare a nullptr-initialized static variable of that
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// type named "pfunc".
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#define DYN_FUNC_DECLARE(func) \
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typedef decltype(&func) func##_t; \
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static func##_t p##func = nullptr;
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// Attempt to load the function from the given module handle.
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#define OPENAL_FUNC_LOAD(func) \
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p##func = (func##_t)::GetProcAddress(s_openal_dll, #func); \
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if (!p##func) \
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{ \
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return false; \
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}
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OPENAL_API_VISIT(DYN_FUNC_DECLARE);
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static bool InitFunctions()
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{
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OPENAL_API_VISIT(OPENAL_FUNC_LOAD);
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return true;
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}
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static bool InitLibrary()
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{
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if (s_openal_dll)
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return true;
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s_openal_dll = ::LoadLibrary(TEXT("openal32.dll"));
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if (!s_openal_dll)
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return false;
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if (!InitFunctions())
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{
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::FreeLibrary(s_openal_dll);
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s_openal_dll = nullptr;
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return false;
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}
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return true;
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}
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bool OpenALStream::IsValid()
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{
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return InitLibrary();
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}
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//
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// AyuanX: Spec says OpenAL1.1 is thread safe already
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//
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bool OpenALStream::Init()
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{
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if (!palcIsExtensionPresent(nullptr, "ALC_ENUMERATION_EXT"))
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{
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PanicAlertFmtT("OpenAL: can't find sound devices");
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return false;
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}
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const char* default_device_dame = palcGetString(nullptr, ALC_DEFAULT_DEVICE_SPECIFIER);
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INFO_LOG_FMT(AUDIO, "Found OpenAL device {}", default_device_dame);
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ALCdevice* device = palcOpenDevice(default_device_dame);
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if (!device)
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{
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PanicAlertFmtT("OpenAL: can't open device {0}", default_device_dame);
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return false;
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}
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ALCcontext* context = palcCreateContext(device, nullptr);
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if (!context)
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{
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palcCloseDevice(device);
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PanicAlertFmtT("OpenAL: can't create context for device {0}", default_device_dame);
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return false;
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}
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palcMakeContextCurrent(context);
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m_run_thread.Set();
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m_thread = std::thread(&OpenALStream::SoundLoop, this);
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return true;
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}
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OpenALStream::~OpenALStream()
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{
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m_run_thread.Clear();
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m_thread.join();
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palSourceStop(m_source);
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palSourcei(m_source, AL_BUFFER, 0);
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// Clean up buffers and sources
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palDeleteSources(1, &m_source);
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m_source = 0;
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palDeleteBuffers(OAL_BUFFERS, m_buffers.data());
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ALCcontext* context = palcGetCurrentContext();
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ALCdevice* device = palcGetContextsDevice(context);
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palcMakeContextCurrent(nullptr);
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palcDestroyContext(context);
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palcCloseDevice(device);
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}
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void OpenALStream::SetVolume(int volume)
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{
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m_volume = (float)volume / 100.0f;
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if (m_source)
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palSourcef(m_source, AL_GAIN, m_volume);
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}
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bool OpenALStream::SetRunning(bool running)
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{
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if (running)
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{
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palSourcePlay(m_source);
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}
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else
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{
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palSourceStop(m_source);
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}
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return true;
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}
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static ALenum CheckALError(const char* desc)
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{
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ALenum err = palGetError();
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if (err != AL_NO_ERROR)
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{
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std::string type;
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switch (err)
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{
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case AL_INVALID_NAME:
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type = "AL_INVALID_NAME";
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break;
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case AL_INVALID_ENUM:
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type = "AL_INVALID_ENUM";
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break;
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case AL_INVALID_VALUE:
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type = "AL_INVALID_VALUE";
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break;
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case AL_INVALID_OPERATION:
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type = "AL_INVALID_OPERATION";
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break;
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case AL_OUT_OF_MEMORY:
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type = "AL_OUT_OF_MEMORY";
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break;
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default:
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type = "UNKNOWN_ERROR";
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break;
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}
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ERROR_LOG_FMT(AUDIO, "Error {}: {:08x} {}", desc, err, type);
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}
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return err;
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}
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static bool IsCreativeXFi()
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{
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return strstr(palGetString(AL_RENDERER), "X-Fi") != nullptr;
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}
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void OpenALStream::SoundLoop()
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{
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Common::SetCurrentThreadName("Audio thread - openal");
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bool float32_capable = palIsExtensionPresent("AL_EXT_float32") != 0;
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bool surround_capable = palIsExtensionPresent("AL_EXT_MCFORMATS") || IsCreativeXFi();
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bool use_surround = Config::ShouldUseDPL2Decoder() && surround_capable;
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// As there is no extension to check for 32-bit fixed point support
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// and we know that only a X-Fi with hardware OpenAL supports it,
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// we just check if one is being used.
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bool fixed32_capable = IsCreativeXFi();
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u32 frequency = m_mixer->GetSampleRate();
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u32 frames_per_buffer;
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// Can't have zero samples per buffer
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if (Config::Get(Config::MAIN_AUDIO_LATENCY) > 0)
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{
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frames_per_buffer = frequency / 1000 * Config::Get(Config::MAIN_AUDIO_LATENCY) / OAL_BUFFERS;
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}
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else
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{
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frames_per_buffer = frequency / 1000 * 1 / OAL_BUFFERS;
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}
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if (frames_per_buffer > OAL_MAX_FRAMES)
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{
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frames_per_buffer = OAL_MAX_FRAMES;
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}
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INFO_LOG_FMT(AUDIO, "Using {} buffers, each with {} audio frames for a total of {}.", OAL_BUFFERS,
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frames_per_buffer, frames_per_buffer * OAL_BUFFERS);
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// Should we make these larger just in case the mixer ever sends more samples
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// than what we request?
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m_realtime_buffer.resize(frames_per_buffer * STEREO_CHANNELS);
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m_source = 0;
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// Clear error state before querying or else we get false positives.
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ALenum err = palGetError();
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// Generate some AL Buffers for streaming
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palGenBuffers(OAL_BUFFERS, (ALuint*)m_buffers.data());
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err = CheckALError("generating buffers");
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// Generate a Source to playback the Buffers
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palGenSources(1, &m_source);
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err = CheckALError("generating sources");
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// Set the default sound volume as saved in the config file.
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palSourcef(m_source, AL_GAIN, m_volume);
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// TODO: Error handling
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// ALenum err = alGetError();
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unsigned int next_buffer = 0;
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unsigned int num_buffers_queued = 0;
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ALint state = 0;
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while (m_run_thread.IsSet())
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{
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// Block until we have a free buffer
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int num_buffers_processed;
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palGetSourcei(m_source, AL_BUFFERS_PROCESSED, &num_buffers_processed);
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if (num_buffers_queued == OAL_BUFFERS && !num_buffers_processed)
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{
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std::this_thread::sleep_for(std::chrono::milliseconds(1));
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continue;
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}
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// Remove the Buffer from the Queue.
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if (num_buffers_processed)
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{
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std::array<ALuint, OAL_BUFFERS> unqueued_buffer_ids;
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palSourceUnqueueBuffers(m_source, num_buffers_processed, unqueued_buffer_ids.data());
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err = CheckALError("unqueuing buffers");
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num_buffers_queued -= num_buffers_processed;
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}
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unsigned int min_frames = frames_per_buffer;
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if (use_surround)
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{
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std::array<float, OAL_MAX_FRAMES * SURROUND_CHANNELS> dpl2;
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u32 rendered_frames = static_cast<u32>(m_mixer->MixSurround(dpl2.data(), min_frames));
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if (rendered_frames < min_frames)
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continue;
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if (float32_capable)
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{
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palBufferData(m_buffers[next_buffer], AL_FORMAT_51CHN32, dpl2.data(),
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rendered_frames * FRAME_SURROUND_FLOAT, frequency);
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}
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else if (fixed32_capable)
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{
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std::array<int, OAL_MAX_FRAMES * SURROUND_CHANNELS> surround_int32;
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for (u32 i = 0; i < rendered_frames * SURROUND_CHANNELS; ++i)
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{
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dpl2[i] = dpl2[i] * std::numeric_limits<int>::max();
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if (dpl2[i] > std::numeric_limits<int>::max())
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surround_int32[i] = std::numeric_limits<int>::max();
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else if (dpl2[i] < std::numeric_limits<int>::min())
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surround_int32[i] = std::numeric_limits<int>::min();
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else
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surround_int32[i] = static_cast<int>(dpl2[i]);
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}
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palBufferData(m_buffers[next_buffer], AL_FORMAT_51CHN32, surround_int32.data(),
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rendered_frames * FRAME_SURROUND_INT32, frequency);
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}
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else
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{
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std::array<short, OAL_MAX_FRAMES * SURROUND_CHANNELS> surround_short;
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for (u32 i = 0; i < rendered_frames * SURROUND_CHANNELS; ++i)
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{
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dpl2[i] = dpl2[i] * std::numeric_limits<short>::max();
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if (dpl2[i] > std::numeric_limits<short>::max())
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surround_short[i] = std::numeric_limits<short>::max();
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else if (dpl2[i] < std::numeric_limits<short>::min())
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surround_short[i] = std::numeric_limits<short>::min();
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else
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surround_short[i] = static_cast<short>(dpl2[i]);
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}
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palBufferData(m_buffers[next_buffer], AL_FORMAT_51CHN16, surround_short.data(),
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rendered_frames * FRAME_SURROUND_SHORT, frequency);
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}
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err = CheckALError("buffering data");
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if (err == AL_INVALID_ENUM)
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{
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// 5.1 is not supported by the host, fallback to stereo
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WARN_LOG_FMT(
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AUDIO, "Unable to set 5.1 surround mode. Updating OpenAL Soft might fix this issue.");
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use_surround = false;
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}
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}
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else
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{
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u32 rendered_frames = static_cast<u32>(m_mixer->Mix(m_realtime_buffer.data(), min_frames));
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if (!rendered_frames)
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continue;
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palBufferData(m_buffers[next_buffer], AL_FORMAT_STEREO16, m_realtime_buffer.data(),
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rendered_frames * FRAME_STEREO_SHORT, frequency);
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}
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palSourceQueueBuffers(m_source, 1, &m_buffers[next_buffer]);
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err = CheckALError("queuing buffers");
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num_buffers_queued++;
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next_buffer = (next_buffer + 1) % OAL_BUFFERS;
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palGetSourcei(m_source, AL_SOURCE_STATE, &state);
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if (state != AL_PLAYING)
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{
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// Buffer underrun occurred, resume playback
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palSourcePlay(m_source);
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err = CheckALError("occurred resuming playback");
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}
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}
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}
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#endif // _WIN32
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