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udev: allow passing of ignore_dB= parameter to alsa modules

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This commit is contained in:
Lennart Poettering 2009-08-19 02:29:59 +02:00
parent 24e582808c
commit d6f598ab3e
4 changed files with 49 additions and 23 deletions
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37
src/modules/alsa/alsa-sink.c
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@ -68,6 +68,8 @@
#define TSCHED_MIN_SLEEP_USEC (10*PA_USEC_PER_MSEC) /* 10ms -- Sleep at least 10ms on each iteration */
#define TSCHED_MIN_WAKEUP_USEC (4*PA_USEC_PER_MSEC) /* 4ms -- Wakeup at least this long before the buffer runs empty*/
#define VOLUME_ACCURACY (PA_VOLUME_NORM/100) /* don't require volume adjustments to be perfectly correct. don't necessarily extend granularity in software unless the differences get greater than this level */
struct userdata {
pa_core *core;
pa_module *module;
@ -1034,15 +1036,11 @@ static void sink_get_volume_cb(pa_sink *s) {
if (pa_cvolume_equal(&u->hardware_volume, &r))
return;
s->virtual_volume = u->hardware_volume = r;
s->real_volume = u->hardware_volume = r;
if (u->mixer_path->has_dB) {
pa_cvolume reset;
/* Hmm, so the hardware volume changed, let's reset our software volume */
pa_cvolume_reset(&reset, s->sample_spec.channels);
pa_sink_set_soft_volume(s, &reset);
}
/* Hmm, so the hardware volume changed, let's reset our software volume */
if (u->mixer_path->has_dB)
pa_sink_set_soft_volume(s, NULL);
}
static void sink_set_volume_cb(pa_sink *s) {
@ -1055,7 +1053,7 @@ static void sink_set_volume_cb(pa_sink *s) {
pa_assert(u->mixer_handle);
/* Shift up by the base volume */
pa_sw_cvolume_divide_scalar(&r, &s->virtual_volume, s->base_volume);
pa_sw_cvolume_divide_scalar(&r, &s->real_volume, s->base_volume);
if (pa_alsa_path_set_volume(u->mixer_path, u->mixer_handle, &s->channel_map, &r) < 0)
return;
@ -1066,13 +1064,26 @@ static void sink_set_volume_cb(pa_sink *s) {
u->hardware_volume = r;
if (u->mixer_path->has_dB) {
pa_cvolume new_soft_volume;
pa_bool_t accurate_enough;
/* Match exactly what the user requested by software */
pa_sw_cvolume_divide(&s->soft_volume, &s->virtual_volume, &u->hardware_volume);
pa_sw_cvolume_divide(&new_soft_volume, &s->real_volume, &u->hardware_volume);
pa_log_debug("Requested volume: %s", pa_cvolume_snprint(t, sizeof(t), &s->virtual_volume));
/* If the adjustment to do in software is only minimal we
* can skip it. That saves us CPU at the expense of a bit of
* accuracy */
accurate_enough =
(pa_cvolume_min(&new_soft_volume) >= (PA_VOLUME_NORM - VOLUME_ACCURACY)) &&
(pa_cvolume_max(&new_soft_volume) <= (PA_VOLUME_NORM + VOLUME_ACCURACY));
pa_log_debug("Requested volume: %s", pa_cvolume_snprint(t, sizeof(t), &s->real_volume));
pa_log_debug("Got hardware volume: %s", pa_cvolume_snprint(t, sizeof(t), &u->hardware_volume));
pa_log_debug("Calculated software volume: %s", pa_cvolume_snprint(t, sizeof(t), &s->soft_volume));
pa_log_debug("Calculated software volume: %s (accurate-enough=%s)", pa_cvolume_snprint(t, sizeof(t), &new_soft_volume),
pa_yes_no(accurate_enough));
if (!accurate_enough)
s->soft_volume = new_soft_volume;
} else {
pa_log_debug("Wrote hardware volume: %s", pa_cvolume_snprint(t, sizeof(t), &r));
@ -1080,7 +1091,7 @@ static void sink_set_volume_cb(pa_sink *s) {
/* We can't match exactly what the user requested, hence let's
* at least tell the user about it */
s->virtual_volume = r;
s->real_volume = r;
}
}