Remove CoreAudio audio backend

Cubeb handles everything the CoreAudio backend can, plus supports DPL2.

Source/Core/AudioCommon/AudioCommon.cpp

@@ -4,7 +4,6 @@
 
 #include "AudioCommon/AudioCommon.h"
 #include "AudioCommon/AlsaSoundStream.h"
-#include "AudioCommon/CoreAudioSoundStream.h"
 #include "AudioCommon/CubebStream.h"
 #include "AudioCommon/Mixer.h"
 #include "AudioCommon/NullSoundStream.h"
@@ -46,8 +45,6 @@ void InitSoundStream()
   }
   else if (backend == BACKEND_ALSA && AlsaSound::isValid())
     g_sound_stream = std::make_unique<AlsaSound>();
-  else if (backend == BACKEND_COREAUDIO && CoreAudioSound::isValid())
-    g_sound_stream = std::make_unique<CoreAudioSound>();
   else if (backend == BACKEND_PULSEAUDIO && PulseAudio::isValid())
     g_sound_stream = std::make_unique<PulseAudio>();
   else if (backend == BACKEND_OPENSLES && OpenSLESStream::isValid())
@@ -101,7 +98,7 @@ std::string GetDefaultSoundBackend()
   if (AlsaSound::isValid())
     backend = BACKEND_ALSA;
 #elif defined __APPLE__
-  backend = BACKEND_COREAUDIO;
+  backend = BACKEND_CUBEB;
 #elif defined _WIN32
   backend = BACKEND_XAUDIO2;
 #endif
@@ -118,8 +115,6 @@ std::vector<std::string> GetSoundBackends()
     backends.push_back(BACKEND_XAUDIO2);
   if (AlsaSound::isValid())
     backends.push_back(BACKEND_ALSA);
-  if (CoreAudioSound::isValid())
-    backends.push_back(BACKEND_COREAUDIO);
   if (PulseAudio::isValid())
     backends.push_back(BACKEND_PULSEAUDIO);
   if (OpenALStream::isValid())
@@ -152,8 +147,7 @@ bool SupportsVolumeChanges(const std::string& backend)
   // FIXME: this one should ask the backend whether it supports it.
   //       but getting the backend from string etc. is probably
   //       too much just to enable/disable a stupid slider...
-  return backend == BACKEND_COREAUDIO || backend == BACKEND_CUBEB || backend == BACKEND_OPENAL ||
-         backend == BACKEND_XAUDIO2;
+  return backend == BACKEND_CUBEB || backend == BACKEND_OPENAL || backend == BACKEND_XAUDIO2;
 }
 
 void UpdateSoundStream()

Source/Core/AudioCommon/AudioCommon.vcxproj

@@ -54,7 +54,6 @@
     <ClInclude Include="AlsaSoundStream.h" />
     <ClInclude Include="AudioCommon.h" />
     <ClInclude Include="AudioStretcher.h" />
-    <ClInclude Include="CoreAudioSoundStream.h" />
     <ClInclude Include="CubebStream.h" />
     <ClInclude Include="CubebUtils.h" />
     <ClInclude Include="DPL2Decoder.h" />

Source/Core/AudioCommon/AudioCommon.vcxproj.filters

@@ -53,9 +53,6 @@
     <ClInclude Include="OpenSLESStream.h">
       <Filter>SoundStreams</Filter>
     </ClInclude>
-    <ClInclude Include="CoreAudioSoundStream.h">
-      <Filter>SoundStreams</Filter>
-    </ClInclude>
     <ClInclude Include="AlsaSoundStream.h">
       <Filter>SoundStreams</Filter>
     </ClInclude>

Source/Core/AudioCommon/CMakeLists.txt

@@ -67,9 +67,6 @@ if(WIN32)
   else()
     message(FATAL_ERROR "OpenAL NOT found in Externals")
   endif()
-
-elseif(APPLE)
-  target_sources(audiocommon PRIVATE CoreAudioSoundStream.cpp)
 endif()
 
 target_link_libraries(audiocommon PRIVATE cubeb SoundTouch)

Source/Core/AudioCommon/CoreAudioSoundStream.cpp

@@ -1,123 +0,0 @@
-// Copyright 2009 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
-
-#include <AudioUnit/AudioUnit.h>
-
-#include "AudioCommon/CoreAudioSoundStream.h"
-#include "Common/Logging/Log.h"
-
-OSStatus CoreAudioSound::callback(void* inRefCon, AudioUnitRenderActionFlags* ioActionFlags,
-                                  const AudioTimeStamp* inTimeStamp, UInt32 inBusNumber,
-                                  UInt32 inNumberFrames, AudioBufferList* ioData)
-{
-  for (UInt32 i = 0; i < ioData->mNumberBuffers; i++)
-    ((CoreAudioSound*)inRefCon)
-        ->m_mixer->Mix((short*)ioData->mBuffers[i].mData, ioData->mBuffers[i].mDataByteSize / 4);
-
-  return noErr;
-}
-
-bool CoreAudioSound::Start()
-{
-  OSStatus err;
-  AURenderCallbackStruct callback_struct;
-  AudioStreamBasicDescription format;
-  AudioComponentDescription desc;
-  AudioComponent component;
-
-  desc.componentType = kAudioUnitType_Output;
-  desc.componentSubType = kAudioUnitSubType_DefaultOutput;
-  desc.componentFlags = 0;
-  desc.componentFlagsMask = 0;
-  desc.componentManufacturer = kAudioUnitManufacturer_Apple;
-  component = AudioComponentFindNext(nullptr, &desc);
-  if (component == nullptr)
-  {
-    ERROR_LOG(AUDIO, "error finding audio component");
-    return false;
-  }
-
-  err = AudioComponentInstanceNew(component, &audioUnit);
-  if (err != noErr)
-  {
-    ERROR_LOG(AUDIO, "error opening audio component");
-    return false;
-  }
-
-  FillOutASBDForLPCM(format, m_mixer->GetSampleRate(), 2, 16, 16, false, false, false);
-  err = AudioUnitSetProperty(audioUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0,
-                             &format, sizeof(AudioStreamBasicDescription));
-  if (err != noErr)
-  {
-    ERROR_LOG(AUDIO, "error setting audio format");
-    return false;
-  }
-
-  callback_struct.inputProc = callback;
-  callback_struct.inputProcRefCon = this;
-  err = AudioUnitSetProperty(audioUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input,
-                             0, &callback_struct, sizeof callback_struct);
-  if (err != noErr)
-  {
-    ERROR_LOG(AUDIO, "error setting audio callback");
-    return false;
-  }
-
-  err = AudioUnitSetParameter(audioUnit, kHALOutputParam_Volume, kAudioUnitScope_Output, 0,
-                              m_volume / 100., 0);
-  if (err != noErr)
-    ERROR_LOG(AUDIO, "error setting volume");
-
-  err = AudioUnitInitialize(audioUnit);
-  if (err != noErr)
-  {
-    ERROR_LOG(AUDIO, "error initializing audiounit");
-    return false;
-  }
-
-  err = AudioOutputUnitStart(audioUnit);
-  if (err != noErr)
-  {
-    ERROR_LOG(AUDIO, "error starting audiounit");
-    return false;
-  }
-
-  return true;
-}
-
-void CoreAudioSound::SetVolume(int volume)
-{
-  OSStatus err;
-  m_volume = volume;
-
-  err = AudioUnitSetParameter(audioUnit, kHALOutputParam_Volume, kAudioUnitScope_Output, 0,
-                              volume / 100., 0);
-  if (err != noErr)
-    ERROR_LOG(AUDIO, "error setting volume");
-}
-
-void CoreAudioSound::SoundLoop()
-{
-}
-
-void CoreAudioSound::Stop()
-{
-  OSStatus err;
-
-  err = AudioOutputUnitStop(audioUnit);
-  if (err != noErr)
-    ERROR_LOG(AUDIO, "error stopping audiounit");
-
-  err = AudioUnitUninitialize(audioUnit);
-  if (err != noErr)
-    ERROR_LOG(AUDIO, "error uninitializing audiounit");
-
-  err = AudioComponentInstanceDispose(audioUnit);
-  if (err != noErr)
-    ERROR_LOG(AUDIO, "error closing audio component");
-}
-
-void CoreAudioSound::Update()
-{
-}

Source/Core/AudioCommon/CoreAudioSoundStream.h

@@ -1,32 +0,0 @@
-// Copyright 2008 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
-
-#pragma once
-
-#ifdef __APPLE__
-#include <AudioUnit/AudioUnit.h>
-#endif
-
-#include "AudioCommon/SoundStream.h"
-
-class CoreAudioSound final : public SoundStream
-{
-#ifdef __APPLE__
-public:
-  bool Start() override;
-  void SetVolume(int volume) override;
-  void SoundLoop() override;
-  void Stop() override;
-  void Update() override;
-
-  static bool isValid() { return true; }
-private:
-  AudioUnit audioUnit;
-  int m_volume;
-
-  static OSStatus callback(void* inRefCon, AudioUnitRenderActionFlags* ioActionFlags,
-                           const AudioTimeStamp* inTimeStamp, UInt32 inBusNumber,
-                           UInt32 inNumberFrames, AudioBufferList* ioData);
-#endif
-};

Source/Core/Core/ConfigManager.h

@@ -35,7 +35,6 @@ class TMDReader;
 // DSP Backend Types
 #define BACKEND_NULLSOUND _trans("No audio output")
 #define BACKEND_ALSA "ALSA"
-#define BACKEND_COREAUDIO "CoreAudio"
 #define BACKEND_CUBEB "Cubeb"
 #define BACKEND_OPENAL "OpenAL"
 #define BACKEND_PULSEAUDIO "Pulse"