basic voice gate

src/audio/manager.cpp

@@ -176,6 +176,10 @@ void AudioManager::SetPlayback(bool playback) {
     m_should_playback = playback;
 }
 
+void AudioManager::SetCaptureGate(double gate) {
+    m_capture_gate = gate * 0.01;
+}
+
 void AudioManager::SetMuteSSRC(uint32_t ssrc, bool mute) {
     std::lock_guard<std::mutex> _(m_mutex);
     if (mute) {
@@ -197,6 +201,8 @@ void AudioManager::OnCapturedPCM(const int16_t *pcm, ma_uint32 frames) {
 
     UpdateCaptureVolume(pcm, frames);
 
+    if (m_capture_peak_meter / 32768.0 < m_capture_gate) return;
+
     int payload_len = opus_encode(m_encoder, pcm, 480, static_cast<unsigned char *>(m_opus_buffer), 1275);
     if (payload_len < 0) {
         printf("encoding error: %d\n", payload_len);

src/audio/manager.hpp

@@ -30,6 +30,8 @@ public:
     void SetCapture(bool capture);
     void SetPlayback(bool playback);
 
+    void SetCaptureGate(double gate);
+
     void SetMuteSSRC(uint32_t ssrc, bool mute);
     void SetVolumeSSRC(uint32_t ssrc, double volume);
 
@@ -71,6 +73,8 @@ private:
     std::atomic<bool> m_should_capture = true;
     std::atomic<bool> m_should_playback = true;
 
+    std::atomic<double> m_capture_gate = 0.0;
+
     std::unordered_set<uint32_t> m_muted_ssrcs;
     std::unordered_map<uint32_t, double> m_volume_ssrc;