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| author | Glenn Kasten <gkasten@google.com> | 2012-08-27 13:43:35 -0700 |
|---|---|---|
| committer | Android (Google) Code Review <android-gerrit@google.com> | 2012-08-27 13:43:36 -0700 |
| commit | 39852d50c18fdc88e8a3a38c5c531c06ddc70877 (patch) | |
| tree | 56b5f0008b1b184c721915d669f87b5bc779411b /audio | |
| parent | baaaeb0278566694207ab70cd6f75c80179762a4 (diff) | |
| parent | 8bf9bea8cb1867e227a640f98b084a4330602d70 (diff) | |
| download | device_samsung_tuna-39852d50c18fdc88e8a3a38c5c531c06ddc70877.zip device_samsung_tuna-39852d50c18fdc88e8a3a38c5c531c06ddc70877.tar.gz device_samsung_tuna-39852d50c18fdc88e8a3a38c5c531c06ddc70877.tar.bz2 | |
Merge "Triple buffer if SRC enabled" into jb-mr1-dev
Diffstat (limited to 'audio')
| -rw-r--r-- | audio/audio_hw.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/audio/audio_hw.c b/audio/audio_hw.c index 8ae519c..b841c57 100644 --- a/audio/audio_hw.c +++ b/audio/audio_hw.c @@ -180,6 +180,11 @@ */ #ifdef PLAYBACK_MMAP #define PLAYBACK_SHORT_PERIOD_COUNT 4 +/* If sample rate converter is required, then use triple-buffering to + * help mask the variance in cycle times. Otherwise use double-buffering. + */ +#elif DEFAULT_OUT_SAMPLING_RATE != MM_FULL_POWER_SAMPLING_RATE +#define PLAYBACK_SHORT_PERIOD_COUNT 3 #else #define PLAYBACK_SHORT_PERIOD_COUNT 2 #endif @@ -297,6 +302,7 @@ enum tty_modes { TTY_MODE_FULL }; +/* deep buffer */ struct pcm_config pcm_config_mm = { .channels = 2, .rate = MM_FULL_POWER_SAMPLING_RATE, @@ -307,6 +313,7 @@ struct pcm_config pcm_config_mm = { .avail_min = DEEP_BUFFER_LONG_PERIOD_SIZE, }; +/* low latency */ struct pcm_config pcm_config_tones = { .channels = 2, .rate = MM_FULL_POWER_SAMPLING_RATE, |