add runtime option for selecting audio backend priority (voice only)

src/abaddon.cpp

@@ -36,7 +36,8 @@
 Abaddon::Abaddon()
     : m_settings(Platform::FindConfigFile())
     , m_discord(GetSettings().UseMemoryDB) // stupid but easy
-    , m_emojis(GetResPath("/emojis.bin")) {
+    , m_emojis(GetResPath("/emojis.bin"))
+    , m_audio(GetSettings().Backends) {
     LoadFromSettings();
 
     // todo: set user agent for non-client(?)

src/audio/manager.cpp

@@ -85,7 +85,7 @@ void mgr_log_callback(void *pUserData, ma_uint32 level, const char *pMessage) {
     g_free(msg);
 }
 
-AudioManager::AudioManager()
+AudioManager::AudioManager(const Glib::ustring &backends_string)
     : m_log(spdlog::stdout_color_mt("miniaudio")) {
     m_ok = true;
 
@@ -107,7 +107,19 @@ AudioManager::AudioManager()
 
     auto ctx_cfg = ma_context_config_init();
     ctx_cfg.pLog = &m_ma_log;
-    if (ma_context_init(nullptr, 0, &ctx_cfg, &m_context) != MA_SUCCESS) {
+
+    ma_backend *pBackends = nullptr;
+    ma_uint32 backendCount = 0;
+
+    std::vector<ma_backend> backends_vec;
+    if (!backends_string.empty()) {
+        spdlog::get("audio")->debug("Using backends list: {}", std::string(backends_string));
+        backends_vec = ParseBackendsList(backends_string);
+        pBackends = backends_vec.data();
+        backendCount = static_cast<ma_uint32>(backends_vec.size());
+    }
+
+    if (ma_context_init(pBackends, backendCount, &ctx_cfg, &m_context) != MA_SUCCESS) {
         spdlog::get("audio")->error("failed to initialize context");
         m_ok = false;
         return;
@@ -647,6 +659,28 @@ AudioManager::VADMethod AudioManager::GetVADMethod() const {
     return m_vad_method;
 }
 
+std::vector<ma_backend> AudioManager::ParseBackendsList(const Glib::ustring &list) {
+    auto regex = Glib::Regex::create(";");
+    const std::vector<Glib::ustring> split = regex->split(list);
+
+    std::vector<ma_backend> backends;
+    for (const auto &s : split) {
+        if (s == "wasapi") backends.push_back(ma_backend_wasapi);
+        else if (s == "dsound") backends.push_back(ma_backend_dsound);
+        else if (s == "winmm") backends.push_back(ma_backend_winmm);
+        else if (s == "coreaudio") backends.push_back(ma_backend_coreaudio);
+        else if (s == "sndio") backends.push_back(ma_backend_sndio);
+        else if (s == "audio4") backends.push_back(ma_backend_audio4);
+        else if (s == "oss") backends.push_back(ma_backend_oss);
+        else if (s == "pulseaudio") backends.push_back(ma_backend_pulseaudio);
+        else if (s == "alsa") backends.push_back(ma_backend_alsa);
+        else if (s == "jack") backends.push_back(ma_backend_jack);
+    }
+    backends.push_back(ma_backend_null);
+
+    return backends;
+}
+
 #ifdef WITH_RNNOISE
 float AudioManager::GetCurrentVADProbability() const {
     return m_vad_prob;

src/audio/manager.hpp

@@ -25,7 +25,7 @@
 
 class AudioManager {
 public:
-    AudioManager();
+    AudioManager(const Glib::ustring &backends_string);
     ~AudioManager();
 
     void AddSSRC(uint32_t ssrc);
@@ -80,6 +80,8 @@ public:
     void SetVADMethod(VADMethod method);
     VADMethod GetVADMethod() const;
 
+    static std::vector<ma_backend> ParseBackendsList(const Glib::ustring &list);
+
 #ifdef WITH_RNNOISE
     float GetCurrentVADProbability() const;
     double GetRNNProbThreshold() const;

src/settings.cpp

@@ -126,6 +126,7 @@ void SettingsManager::DefineSettings() {
 #else
     AddSetting("voice", "vad", "gate"s, &Settings::VAD);
 #endif
+    AddSetting("voice", "backends", ""s, &Settings::Backends);
 }
 
 void SettingsManager::ReadSettings() {

src/settings.hpp

@@ -48,6 +48,7 @@ public:
 
         // [voice]
         std::string VAD;
+        std::string Backends;
 
         // [windows]
         bool HideConsole;