Add libsamplerate, make Voice bitrate configurable

source/CMakeLists.txt

@@ -177,6 +177,7 @@ endif()
 message(STATUS "Using Lua API checks: ${STAR_LUA_APICHECK}")
 message(STATUS "Using jemalloc: ${STAR_USE_JEMALLOC}")
 message(STATUS "Using mimalloc: ${STAR_USE_MIMALLOC}")
+message(STATUS "Using rpmalloc: ${STAR_USE_RPMALLOC}")
 
 # Set C defines and cmake variables based on the build settings we have now
 # determined...
@@ -486,8 +487,10 @@ set(STAR_EXT_LIBS ${STAR_EXT_LIBS}
 
 if(STAR_BUILD_GUI)
   find_package(SDL2 CONFIG REQUIRED)
+  find_package(SampleRate CONFIG REQUIRED)
 
   set(STAR_EXT_GUI_LIBS
+    SampleRate::samplerate
     $<TARGET_NAME_IF_EXISTS:SDL2::SDL2main>
     $<IF:$<TARGET_EXISTS:SDL2::SDL2>,SDL2::SDL2,SDL2::SDL2-static>
   )

source/application/StarMainApplication_sdl.cpp

@@ -271,6 +271,9 @@ public:
 #endif
 
     Logger::info("Application: Initializing SDL Audio");
+#if SDL_VERSION_ATLEAST(2, 0, 26)
+    SDL_SetHint(SDL_HINT_AUDIO_RESAMPLING_MODE, "fast");
+#endif
     if (SDL_InitSubSystem(SDL_INIT_AUDIO))
       throw ApplicationException(strf("Couldn't initialize SDL Audio: {}", SDL_GetError()));
 

source/frontend/StarVoice.cpp

@@ -211,14 +211,26 @@ void Voice::loadJson(Json const& config, bool skipSave) {
 			m_lastInputTime = 0;
 	}
 
+	bool shouldResetEncoder = false;
 	if (auto channelMode = config.optString("channelMode")) {
 		if (change(m_channelMode, VoiceChannelModeNames.getLeft(*channelMode), changed)) {
 			closeDevice();
-			resetEncoder();
+			shouldResetEncoder = true;
 			resetDevice();
 		}
 	}
 
+	// not saving this setting to disk, as it's just for audiophiles
+	// don't want someone fudging their bitrate from the intended defaults and forgetting
+	if (auto bitrate = config.opt("bitrate")) {
+    unsigned newBitrate = bitrate->canConvert(Json::Type::Int)
+			? clamp((unsigned)bitrate->toUInt(), 6000u, 510000u) : 0;
+    shouldResetEncoder |= change(m_bitrate, newBitrate, changed);
+  }
+
+  if (shouldResetEncoder)
+    resetEncoder();
+
 	if (changed && !skipSave)
 		scheduleSave();
 }
@@ -607,7 +619,8 @@ void Voice::resetEncoder() {
   int channels = encoderChannels();
 	MutexLocker locker(m_threadMutex);
   m_encoder.reset(createEncoder(channels));
-  opus_encoder_ctl(m_encoder.get(), OPUS_SET_BITRATE(channels == 2 ? 50000 : 24000));
+	int bitrate = m_bitrate > 0 ? (int)m_bitrate : (channels == 2 ? 50000 : 24000);
+  opus_encoder_ctl(m_encoder.get(), OPUS_SET_BITRATE(bitrate));
 }
 
 void Voice::resetDevice() {

source/frontend/StarVoice.hpp

@@ -195,6 +195,7 @@ private:
   Maybe<String> m_deviceName;
   VoiceInputMode m_inputMode;
   VoiceChannelMode m_channelMode;
+  unsigned m_bitrate = 0;
 
   ThreadFunction<void> m_thread;
   Mutex m_threadMutex;

source/vcpkg-configuration.json

@@ -2,7 +2,7 @@
   "$schema": "https://raw.githubusercontent.com/microsoft/vcpkg-tool/main/docs/vcpkg-configuration.schema.json",
   "default-registry": {
     "kind": "git",
-    "baseline": "f4456c1b974131b8467c7371a3c302b7f58a99f2",
+    "baseline": "1de2026f28ead93ff1773e6e680387643e914ea1",
     "repository": "https://github.com/microsoft/vcpkg"
   }
 }

source/vcpkg.json

@@ -2,7 +2,11 @@
   "$schema": "https://raw.githubusercontent.com/microsoft/vcpkg-tool/main/docs/vcpkg.schema.json",
   "dependencies": [
     "glew",
-    "sdl2",
+    "libsamplerate",
+    {
+      "name": "sdl2",
+      "features": [ "samplerate" ]
+    },
     "libvorbis",
     "zlib",
     "freetype",