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sink, source: Rework reconfiguration logic to apply to more than rate

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This rejigs the update_rate() logic to encompass changes to the sample
spec as a whole, as well as passthrough status. As a result,
sinks/sources provide a reconfigure() method which allows
reconfiguration as required.

The behaviour itself is currently unchanged -- alsa-sink/-source do not
actually implement anything other than rate updates for now (nor are
they ever requested to). This can be modified in the future, to allow,
for example 24-bit output when incoming media supports it, as well as
channel count changes for passthrough sinks.

Another related change is that passthrough status is now part of
sink/source reconfiguration, and we can stop doing a suspend/unsuspend
when entering/leaving passthrough state. So that part is now divided
in two -- pa_sink_reconfigure() sets the sink in passthrough mode if
required, and pa_sink_enter_passthrough() sets up everything else
(this currently means only volumes, but could disable other processing)
for passthrough mode.
This commit is contained in:
Arun Raghavan 2017-09-03 16:53:17 +05:30
parent 4f1041c271
commit 7a7072557a
8 changed files with 90 additions and 94 deletions
Download patch file Download diff file Expand all files Collapse all files

6
src/pulsecore/source-output.c
View file

@ -356,7 +356,7 @@ int pa_source_output_new(
module-suspend-on-idle can resume a source */
pa_log_info("Trying to change sample rate");
if (pa_source_update_rate(data->source, data->sample_spec.rate, pa_source_output_new_data_is_passthrough(data)) >= 0)
if (pa_source_reconfigure(data->source, &data->sample_spec, pa_source_output_new_data_is_passthrough(data)) >= 0)
pa_log_info("Rate changed to %u Hz", data->source->sample_spec.rate);
}
@ -529,7 +529,7 @@ static void source_output_set_state(pa_source_output *o, pa_source_output_state_
!pa_sample_spec_equal(&o->sample_spec, &o->source->sample_spec)) {
/* We were uncorked and the source was not playing anything -- let's try
* to update the sample rate to avoid resampling */
pa_source_update_rate(o->source, o->sample_spec.rate, pa_source_output_is_passthrough(o));
pa_source_reconfigure(o->source, &o->sample_spec, pa_source_output_is_passthrough(o));
}
pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) == 0);
@ -1523,7 +1523,7 @@ int pa_source_output_finish_move(pa_source_output *o, pa_source *dest, bool save
SOURCE_OUTPUT_MOVE_FINISH hook */
pa_log_info("Trying to change sample rate");
if (pa_source_update_rate(dest, o->sample_spec.rate, pa_source_output_is_passthrough(o)) >= 0)
if (pa_source_reconfigure(dest, &o->sample_spec, pa_source_output_is_passthrough(o)) >= 0)
pa_log_info("Rate changed to %u Hz", dest->sample_spec.rate);
}