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source/sink: Fix wrong calculation of thread_info.current_hw_volume

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In pa_{source,sink}_new() and pa_{source,sink}_put() the current hardware
volume was miscalculated:

hw volume (dB) = real volume (dB) + soft volume (dB)
was used instead of
hw volume (dB) = real volume (dB) - soft volume (dB)

This lead to a crash in pa_alsa_path_set_volume() if high volumes were
set and the port was changed.

This patch fixes the calculation. Thanks to Tanu for pointing out
the correct solution.

Bug link: https://bugs.freedesktop.org/show_bug.cgi?id=65520
This commit is contained in:
Georg Chini 2017-04-29 10:07:01 +02:00
parent 2417305ae7
commit d985276c8b
2 changed files with 4 additions and 4 deletions
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4
src/pulsecore/sink.c
View file

@ -342,7 +342,7 @@ pa_sink* pa_sink_new(
PA_LLIST_HEAD_INIT(pa_sink_volume_change, s->thread_info.volume_changes);
s->thread_info.volume_changes_tail = NULL;
pa_sw_cvolume_multiply(&s->thread_info.current_hw_volume, &s->soft_volume, &s->real_volume);
pa_sw_cvolume_divide(&s->thread_info.current_hw_volume, &s->real_volume, &s->soft_volume);
s->thread_info.volume_change_safety_margin = core->deferred_volume_safety_margin_usec;
s->thread_info.volume_change_extra_delay = core->deferred_volume_extra_delay_usec;
s->thread_info.port_latency_offset = s->port_latency_offset;
@ -639,7 +639,7 @@ void pa_sink_put(pa_sink* s) {
s->thread_info.soft_volume = s->soft_volume;
s->thread_info.soft_muted = s->muted;
pa_sw_cvolume_multiply(&s->thread_info.current_hw_volume, &s->soft_volume, &s->real_volume);
pa_sw_cvolume_divide(&s->thread_info.current_hw_volume, &s->real_volume, &s->soft_volume);
pa_assert((s->flags & PA_SINK_HW_VOLUME_CTRL)
|| (s->base_volume == PA_VOLUME_NORM