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Some crappy hardware generate noise on the output when reading input. To

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avoid triggering this needlesly we tweak the algorithm a bit to avoid reading
when nothing is connected to the source.


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@454 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Pierre Ossman 2006-01-12 16:11:54 +00:00
parent 289c914b47
commit cb2a7ed028
1 changed files with 8 additions and 1 deletions
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9
polyp/module-oss.c
View file

@ -161,7 +161,7 @@ static void do_read(struct userdata *u) {
int loop = 0; int loop = 0;
assert(u); assert(u);
if (!u->source || !pa_iochannel_is_readable(u->io)) if (!u->source || !pa_iochannel_is_readable(u->io) || !pa_idxset_size(u->source->outputs))
return; return;
update_usage(u); update_usage(u);
@ -209,6 +209,12 @@ static void io_callback(PA_GCC_UNUSED pa_iochannel *io, void*userdata) {
do_read(u); do_read(u);
} }
static void source_notify_cb(pa_source *s) {
struct userdata *u = s->userdata;
assert(u);
do_read(u);
}
static pa_usec_t sink_get_latency_cb(pa_sink *s) { static pa_usec_t sink_get_latency_cb(pa_sink *s) {
pa_usec_t r = 0; pa_usec_t r = 0;
int arg; int arg;
@ -329,6 +335,7 @@ int pa__init(pa_core *c, pa_module*m) {
u->source = pa_source_new(c, PA_TYPEID_OSS, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss); u->source = pa_source_new(c, PA_TYPEID_OSS, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss);
assert(u->source); assert(u->source);
u->source->userdata = u; u->source->userdata = u;
u->source->notify = source_notify_cb;
u->source->get_latency = source_get_latency_cb; u->source->get_latency = source_get_latency_cb;
pa_source_set_owner(u->source, m); pa_source_set_owner(u->source, m);
u->source->description = pa_sprintf_malloc("Open Sound System PCM on '%s'", p); u->source->description = pa_sprintf_malloc("Open Sound System PCM on '%s'", p);