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-rw-r--r--plugins/alsa/alsa-core-pcm.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/plugins/alsa/alsa-core-pcm.c b/plugins/alsa/alsa-core-pcm.c
index 509e1ac..f41aed0 100644
--- a/plugins/alsa/alsa-core-pcm.c
+++ b/plugins/alsa/alsa-core-pcm.c
@@ -555,7 +555,21 @@ static void *writeThreadEntry(void *handle) {
alsa_ringbuf_t * rbuf = pcmCopyHandle->rbuf;
- const snd_pcm_sframes_t threshold = 1000;
+ snd_pcm_status_t *pcmOutStatus;
+ snd_pcm_uframes_t pcmOutSize;
+
+ snd_pcm_sframes_t threshold;
+
+ snd_pcm_status_alloca(&pcmOutStatus);
+ snd_pcm_status(pcmOut, pcmOutStatus);
+ pcmOutSize = snd_pcm_status_get_avail_max(pcmOutStatus);
+
+ /* This threshold is the expected space available in the hw output buffer
+ * The aim is to wait to have a significant amount of space, in order to
+ * avoid to write to the device too often, or take a very small amount of
+ * frames from the ring buffer. So basically, this saves some CPU load */
+
+ threshold = pcmOutSize / 3;
for (;;) {