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authorJohn Grossman <johngro@google.com>2011-07-21 10:59:55 -0700
committerSimon Wilson <simonwilson@google.com>2011-07-27 14:59:56 -0700
commit3bb114a6459c78ea4e7d2f84568361430f26ff20 (patch)
treec70ebb8db726110287cf163dcbe55e982fab73dd /include
parentee99f213b29297b1016bc6210c16085c0b3068de (diff)
pcm: add control for ASLA thresholds to pcm_open
Add the ability to explicitly set start, stop and silence thresholds during tinyalsa's pcm_open. Setting any of these values to 0 in your pcm_config structure will cause the system to use its old defaults.
Diffstat (limited to 'include')
-rw-r--r--include/tinyalsa/asoundlib.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/tinyalsa/asoundlib.h b/include/tinyalsa/asoundlib.h
index 8395766..2e8c3e0 100644
--- a/include/tinyalsa/asoundlib.h
+++ b/include/tinyalsa/asoundlib.h
@@ -59,6 +59,18 @@ struct pcm_config {
unsigned int period_size;
unsigned int period_count;
enum pcm_format format;
+
+ /* Values to use for the ALSA start, stop and silence thresholds. Setting
+ * any one of these values to 0 will cause the default tinyalsa values to be
+ * used instead. Tinyalsa defaults are as follows.
+ *
+ * start_threshold : period_count * period_size
+ * stop_threshold : period_count * period_size
+ * silence_threshold : 0
+ */
+ unsigned int start_threshold;
+ unsigned int stop_threshold;
+ unsigned int silence_threshold;
};
/* Mixer control types */