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Hardware volume support on Windows.

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@551 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Pierre Ossman 2006-02-21 16:35:12 +00:00
parent a10257d680
commit 7e5123705a
1 changed files with 40 additions and 0 deletions
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40
src/modules/module-waveout.c
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@ -48,6 +48,8 @@ PA_MODULE_USAGE("sink_name=<name for the sink> source_name=<name for the source>
#define DEFAULT_SINK_NAME "wave_output"
#define DEFAULT_SOURCE_NAME "wave_input"
#define WAVEOUT_MAX_VOLUME 0xFFFF
struct userdata {
pa_sink *sink;
pa_source *source;
@ -336,6 +338,42 @@ static void notify_source_cb(pa_source *s) {
u->core->mainloop->defer_enable(u->defer, 1);
}
static int sink_get_hw_volume_cb(pa_sink *s) {
struct userdata *u = s->userdata;
DWORD vol;
pa_volume_t left, right;
if (waveOutGetVolume(u->hwo, &vol) != MMSYSERR_NOERROR)
return -1;
left = (vol & 0xFFFF) * PA_VOLUME_NORM / WAVEOUT_MAX_VOLUME;
right = ((vol >> 16) & 0xFFFF) * PA_VOLUME_NORM / WAVEOUT_MAX_VOLUME;
/* Windows supports > 2 channels, except for volume control */
if (s->hw_volume.channels > 2)
pa_cvolume_set(&s->hw_volume, s->hw_volume.channels, (left + right)/2);
s->hw_volume.values[0] = left;
if (s->hw_volume.channels > 1)
s->hw_volume.values[1] = right;
return 0;
}
static int sink_set_hw_volume_cb(pa_sink *s) {
struct userdata *u = s->userdata;
DWORD vol;
vol = s->hw_volume.values[0] * WAVEOUT_MAX_VOLUME / PA_VOLUME_NORM;
if (s->hw_volume.channels > 1)
vol |= (s->hw_volume.values[0] * WAVEOUT_MAX_VOLUME / PA_VOLUME_NORM) << 16;
if (waveOutSetVolume(u->hwo, vol) != MMSYSERR_NOERROR)
return -1;
return 0;
}
static int ss_to_waveformat(pa_sample_spec *ss, LPWAVEFORMATEX wf) {
wf->wFormatTag = WAVE_FORMAT_PCM;
@ -455,6 +493,8 @@ int pa__init(pa_core *c, pa_module*m) {
assert(u->sink);
u->sink->notify = notify_sink_cb;
u->sink->get_latency = sink_get_latency_cb;
u->sink->get_hw_volume = sink_get_hw_volume_cb;
u->sink->set_hw_volume = sink_set_hw_volume_cb;
u->sink->userdata = u;
pa_sink_set_owner(u->sink, m);
u->sink->description = pa_sprintf_malloc("Windows waveOut PCM");