[Qemu-devel] [PATCH] alsaaudio: increase default buffer sizes

[Jan Kiszka]

Sound though the ALSA driver is skipping here unless I increase the
buffer size. OSS seems to use 16K as well, and 1K was obviously to small
for recording anyway.

[ PS: Can someone explain to me why I also have to override the
DAC/ADC_FIXED_FREQ to 48000 to make ALSA work? Suboptimal... ]

Signed-off-by: Jan Kiszka <address@hidden>
---
 audio/alsaaudio.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Index: b/audio/alsaaudio.c
===================================================================
--- a/audio/alsaaudio.c
+++ b/audio/alsaaudio.c
@@ -58,7 +58,7 @@ static struct {
     int period_size_out_overridden;
     int verbose;
 } conf = {
-#define DEFAULT_BUFFER_SIZE 1024
+#define DEFAULT_BUFFER_SIZE 16*1024
 #define DEFAULT_PERIOD_SIZE 256
 #ifdef HIGH_LATENCY
     .size_in_usec_in = 1,
@@ -72,8 +72,8 @@ static struct {
     .buffer_size_out = 400000,
     .period_size_out = 400000 / 4,
 #else
-    .buffer_size_in = DEFAULT_BUFFER_SIZE * 4,
-    .period_size_in = DEFAULT_PERIOD_SIZE * 4,
+    .buffer_size_in = DEFAULT_BUFFER_SIZE,
+    .period_size_in = DEFAULT_PERIOD_SIZE,
     .buffer_size_out = DEFAULT_BUFFER_SIZE,
     .period_size_out = DEFAULT_PERIOD_SIZE,
     .buffer_size_in_overridden = 0,