Remove libao sound backend

A single person uses it[0], and it sometimes messes up the Linux
buildbots ("ninja: error: 'ao', needed by 'Binaries/dolphin-emu', missing
and no known rule to make it").

[0]: https://analytics.dolphin-emu.org/stats/popular-audio-backends.txt

1 files changed, 0 insertions, 82 deletions

diff --git a/Source/Core/AudioCommon/AOSoundStream.cpp b/Source/Core/AudioCommon/AOSoundStream.cpp
deleted file mode 100644
index 93f1759785..0000000000
--- a/Source/Core/AudioCommon/AOSoundStream.cpp
+++ /dev/null
@@ -1,82 +0,0 @@
-// Copyright 2008 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
-
-#include <cstring>
-
-#include "AudioCommon/AOSoundStream.h"
-#include "AudioCommon/Mixer.h"
-#include "Common/Logging/Log.h"
-#include "Common/MsgHandler.h"
-
-#if defined(HAVE_AO) && HAVE_AO
-
-void AOSound::SoundLoop()
-{
-  Common::SetCurrentThreadName("Audio thread - ao");
-
-  uint_32 numBytesToRender = 256;
-  ao_initialize();
-  default_driver = ao_default_driver_id();
-  format.bits = 16;
-  format.channels = 2;
-  format.rate = m_mixer->GetSampleRate();
-  format.byte_format = AO_FMT_LITTLE;
-
-  device = ao_open_live(default_driver, &format, nullptr /* no options */);
-  if (!device)
-  {
-    PanicAlertT("AudioCommon: Error opening AO device.\n");
-    ao_shutdown();
-    Stop();
-    return;
-  }
-
-  buf_size = format.bits / 8 * format.channels * format.rate;
-
-  while (m_run_thread.IsSet())
-  {
-    m_mixer->Mix(realtimeBuffer, numBytesToRender >> 2);
-
-    {
-      std::lock_guard<std::mutex> lk(soundCriticalSection);
-      ao_play(device, (char*)realtimeBuffer, numBytesToRender);
-    }
-
-    soundSyncEvent.Wait();
-  }
-}
-
-bool AOSound::Start()
-{
-  m_run_thread.Set();
-  memset(realtimeBuffer, 0, sizeof(realtimeBuffer));
-
-  thread = std::thread(&AOSound::SoundLoop, this);
-  return true;
-}
-
-void AOSound::Update()
-{
-  soundSyncEvent.Set();
-}
-
-void AOSound::Stop()
-{
-  m_run_thread.Clear();
-  soundSyncEvent.Set();
-
-  {
-    std::lock_guard<std::mutex> lk(soundCriticalSection);
-    thread.join();
-
-    if (device)
-      ao_close(device);
-
-    ao_shutdown();
-
-    device = nullptr;
-  }
-}
-
-#endif