[pulseaudio-discuss] [PATCH] lfe-filter: Deal with empty input chunks
arun at accosted.net
arun at accosted.net
Wed Sep 16 21:14:49 PDT 2015
From: Arun Raghavan <git at arunraghavan.net>
It is possible that we get a zero-length memchunk to work with.
Specifically, this happens the resampler (which is called before the
lfe-filter) consumes all the input data, but does not (yet) produce any
output data.
Reproduced using:
pulseaudio --resample-method=soxr-mq
pactl load-module module-null-sink sink_name=lfe_test channels=3 channel_map=front-left,front-right,lfe
paplay --raw /dev/zero --rate=48000 -d lfe_test
Thanks to the original reporter for the backtrace:
Bug: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1496577
---
src/pulsecore/filter/lfe-filter.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/pulsecore/filter/lfe-filter.c b/src/pulsecore/filter/lfe-filter.c
index 8c79b55..5f5ace2 100644
--- a/src/pulsecore/filter/lfe-filter.c
+++ b/src/pulsecore/filter/lfe-filter.c
@@ -113,7 +113,7 @@ pa_memchunk * pa_lfe_filter_process(pa_lfe_filter_t *f, pa_memchunk *buf) {
struct saved_state *s, *s2;
void *data;
- if (!f->active)
+ if (!f->active || !buf->length)
return buf;
/* Remove old states (FIXME: we could do better than searching the entire array here?) */
--
2.4.3
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