From 11078101db321ba94334d349caf3ff4778f4c18e Mon Sep 17 00:00:00 2001 From: Marcelo Fernandez Date: Sun, 15 Apr 2018 11:29:16 -0300 Subject: [PATCH] Fixed high cpu usage with PulseAudio --- drivers/pulseaudio/audio_driver_pulseaudio.cpp | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/pulseaudio/audio_driver_pulseaudio.cpp b/drivers/pulseaudio/audio_driver_pulseaudio.cpp index 0f91c94539c..733c7cc80c9 100644 --- a/drivers/pulseaudio/audio_driver_pulseaudio.cpp +++ b/drivers/pulseaudio/audio_driver_pulseaudio.cpp @@ -177,7 +177,11 @@ Error AudioDriverPulseAudio::init_device() { pa_buffer_attr attr; // set to appropriate buffer length (in bytes) from global settings - attr.tlength = pa_buffer_size * sizeof(int16_t); + // Note: PulseAudio defaults to 4 fragments, which means that the actual + // latency is tlength / fragments. It seems that the PulseAudio has no way + // to get the fragments number so we're hardcoding this to the default of 4 + const int fragments = 4; + attr.tlength = pa_buffer_size * sizeof(int16_t) * fragments; // set them to be automatically chosen attr.prebuf = (uint32_t)-1; attr.maxlength = (uint32_t)-1;