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| author | Kyle Repinski <repinski23@gmail.com> | 2015-03-24 22:57:56 -0500 |
|---|---|---|
| committer | Ziyan <jaraidaniel@gmail.com> | 2016-01-15 12:30:40 +0100 |
| commit | 288e217279919b64677c5b2d6c5d5e23bca67d3b (patch) | |
| tree | d74344df3f4be80fa15f2cf9b270c4f56be35d23 | |
| parent | e83f84c19d5e54ce4569e917afc19e35326b9041 (diff) | |
| download | device_samsung_tuna-288e217279919b64677c5b2d6c5d5e23bca67d3b.zip device_samsung_tuna-288e217279919b64677c5b2d6c5d5e23bca67d3b.tar.gz device_samsung_tuna-288e217279919b64677c5b2d6c5d5e23bca67d3b.tar.bz2 | |
audio: Fix buffer underrun doing short to long period transition.
This basically halves the long period size. I wish there was a different way
to fix this but I don't think there is.
| -rw-r--r-- | audio/audio_hw.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/audio/audio_hw.c b/audio/audio_hw.c index dae9d8a..eaf09a0 100644 --- a/audio/audio_hw.c +++ b/audio/audio_hw.c @@ -161,8 +161,10 @@ ((DEEP_BUFFER_SHORT_PERIOD_SIZE * PLAYBACK_DEEP_BUFFER_SHORT_PERIOD_COUNT) / 2) /* number of short deep buffer periods in a long period */ -#define DEEP_BUFFER_LONG_PERIOD_MULTIPLIER \ - (DEEP_BUFFER_LONG_PERIOD_MS / DEEP_BUFFER_SHORT_PERIOD_MS) +/* previously, this was (DEEP_BUFFER_LONG_PERIOD_MS / DEEP_BUFFER_SHORT_PERIOD_MS), but that caused a buffer underrun + * during the transition from short to long periods. A MULTIPLIER_FACTOR of 7 is the sweet-spot to stop those underruns. */ +#define DEEP_BUFFER_LONG_PERIOD_MULTIPLIER 7 + /* number of frames per long deep buffer period (screen off) */ #define DEEP_BUFFER_LONG_PERIOD_SIZE \ (DEEP_BUFFER_SHORT_PERIOD_SIZE * DEEP_BUFFER_LONG_PERIOD_MULTIPLIER) |