Add extra latency to microphone playback to reduce clipping.

godotengine · Jul 31, 2018 · 59b703c · 59b703c
1 parent d91183b
commit 59b703c
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Showing 2 changed files with 3 additions and 1 deletion.
diff --git a/servers/audio/audio_stream.cpp b/servers/audio/audio_stream.cpp
@@ -138,7 +138,7 @@ void AudioStreamPlaybackMicrophone::_mix_internal(AudioFrame *p_buffer, int p_fr
 	unsigned int input_size = AudioDriver::get_singleton()->get_input_size();
 
 	// p_frames is multipled by two since an AudioFrame is stereo
-	if ((p_frames * 2) > input_size) {
+	if ((p_frames + MICROPHONE_PLAYBACK_DELAY * 2) > input_size) {
 		for (int i = 0; i < p_frames; i++) {
 			p_buffer[i] = AudioFrame(0.0f, 0.0f);
 		}

diff --git a/servers/audio/audio_stream.h b/servers/audio/audio_stream.h
@@ -122,6 +122,8 @@ class AudioStreamPlaybackMicrophone : public AudioStreamPlaybackResampled {
 	GDCLASS(AudioStreamPlaybackMicrophone, AudioStreamPlayback)
 	friend class AudioStreamMicrophone;
 
+	const int MICROPHONE_PLAYBACK_DELAY = 256;
+
 	bool active;
 	unsigned int input_ofs;