Settings: Add audio resampling when running at non-standard speed

src/core/host_interface.cpp

@@ -543,6 +543,7 @@ void HostInterface::SetDefaultSettings(SettingsInterface& si)
   si.SetIntValue("Audio", "OutputVolume", 100);
   si.SetIntValue("Audio", "FastForwardVolume", 100);
   si.SetIntValue("Audio", "BufferSize", DEFAULT_AUDIO_BUFFER_SIZE);
+  si.SetBoolValue("Audio", "Resampling", false);
   si.SetIntValue("Audio", "OutputMuted", false);
   si.SetBoolValue("Audio", "Sync", true);
   si.SetBoolValue("Audio", "DumpOnBoot", false);

src/core/settings.cpp

@@ -206,6 +206,7 @@ void Settings::Load(SettingsInterface& si)
   audio_output_volume = si.GetIntValue("Audio", "OutputVolume", 100);
   audio_fast_forward_volume = si.GetIntValue("Audio", "FastForwardVolume", 100);
   audio_buffer_size = si.GetIntValue("Audio", "BufferSize", HostInterface::DEFAULT_AUDIO_BUFFER_SIZE);
+  audio_resampling = si.GetBoolValue("Audio", "Resampling", false);
   audio_output_muted = si.GetBoolValue("Audio", "OutputMuted", false);
   audio_sync_enabled = si.GetBoolValue("Audio", "Sync", true);
   audio_dump_on_boot = si.GetBoolValue("Audio", "DumpOnBoot", false);
@@ -357,6 +358,7 @@ void Settings::Save(SettingsInterface& si) const
   si.SetIntValue("Audio", "OutputVolume", audio_output_volume);
   si.SetIntValue("Audio", "FastForwardVolume", audio_fast_forward_volume);
   si.SetIntValue("Audio", "BufferSize", audio_buffer_size);
+  si.SetBoolValue("Audio", "Resampling", audio_resampling);
   si.SetBoolValue("Audio", "OutputMuted", audio_output_muted);
   si.SetBoolValue("Audio", "Sync", audio_sync_enabled);
   si.SetBoolValue("Audio", "DumpOnBoot", audio_dump_on_boot);

src/core/settings.h

@@ -146,6 +146,7 @@ struct Settings
   s32 audio_output_volume = 100;
   s32 audio_fast_forward_volume = 100;
   u32 audio_buffer_size = 2048;
+  bool audio_resampling = false;
   bool audio_output_muted = false;
   bool audio_sync_enabled = true;
   bool audio_dump_on_boot = true;

src/duckstation-qt/audiosettingswidget.cpp

@@ -24,6 +24,7 @@ AudioSettingsWidget::AudioSettingsWidget(QtHostInterface* host_interface, QWidge
   SettingWidgetBinder::BindWidgetToIntSetting(m_host_interface, m_ui.bufferSize, "Audio", "BufferSize");
   SettingWidgetBinder::BindWidgetToBoolSetting(m_host_interface, m_ui.startDumpingOnBoot, "Audio", "DumpOnBoot");
   SettingWidgetBinder::BindWidgetToBoolSetting(m_host_interface, m_ui.muteCDAudio, "CDROM", "MuteCDAudio");
+  SettingWidgetBinder::BindWidgetToBoolSetting(m_host_interface, m_ui.resampling, "Audio", "Resampling", false);
 
   m_ui.volume->setValue(m_host_interface->GetIntSettingValue("Audio", "OutputVolume", 100));
   m_ui.fastForwardVolume->setValue(m_host_interface->GetIntSettingValue("Audio", "FastForwardVolume", 100));

src/duckstation-qt/audiosettingswidget.ui

@@ -105,6 +105,13 @@
        </widget>
       </item>
       <item row="4" column="0" colspan="2">
+       <widget class="QCheckBox" name="resampling">
+        <property name="text">
+         <string>Resampling</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="0" colspan="2">
        <widget class="QCheckBox" name="startDumpingOnBoot">
         <property name="text">
          <string>Start Dumping On Boot</string>

src/frontend-common/common_host_interface.cpp

@@ -619,6 +619,10 @@ void CommonHostInterface::UpdateSpeedLimiterState()
 
   if (m_audio_stream)
   {
+    const u32 input_sample_rate = (!is_non_standard_speed || target_speed == 0.0f || !g_settings.audio_resampling) ?
+                                    AUDIO_SAMPLE_RATE :
+                                    static_cast<u32>(static_cast<float>(AUDIO_SAMPLE_RATE) * target_speed);
+    m_audio_stream->SetInputSampleRate(input_sample_rate);
     m_audio_stream->SetOutputVolume(GetAudioOutputVolume());
     m_audio_stream->SetSync(audio_sync_enabled);
     if (audio_sync_enabled)
@@ -1495,9 +1499,9 @@ void CommonHostInterface::RegisterGeneralHotkeys()
 #else
   RegisterHotkey(StaticString(TRANSLATABLE("Hotkeys", "General")), StaticString("TogglePatchCodes"),
                  StaticString(TRANSLATABLE("Hotkeys", "Toggle Patch Codes")), [this](bool pressed) {
-              if (pressed)
-                DoToggleCheats();
-          });
+                   if (pressed)
+                     DoToggleCheats();
+                 });
 #endif
 
   RegisterHotkey(StaticString(TRANSLATABLE("Hotkeys", "General")), StaticString("Reset"),
@@ -2190,7 +2194,8 @@ void CommonHostInterface::CheckForSettingsChanges(const Settings& old_settings)
         g_settings.increase_timer_resolution != old_settings.increase_timer_resolution ||
         g_settings.emulation_speed != old_settings.emulation_speed ||
         g_settings.fast_forward_speed != old_settings.fast_forward_speed ||
-        g_settings.display_max_fps != old_settings.display_max_fps)
+        g_settings.display_max_fps != old_settings.display_max_fps ||
+        g_settings.audio_resampling != old_settings.audio_resampling)
     {
       UpdateSpeedLimiterState();
     }