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sink: Extend API for compressed formats support

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This adds a get_formats() vfunc for sinks to provide a list of formats
they can support. pa_sink_check_formats() can be used during or after
routing to determine what formats from a stream the sink can support.
This commit is contained in:
Arun Raghavan 2011-02-28 13:00:20 +05:30
parent 3767c9c4e8
commit 47e0f91aa2
2 changed files with 58 additions and 0 deletions
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51
src/pulsecore/sink.c
View file

@ -35,6 +35,7 @@
#include <pulse/util.h>
#include <pulse/i18n.h>
#include <pulse/rtclock.h>
#include <pulse/internal.h>
#include <pulsecore/sink-input.h>
#include <pulsecore/namereg.h>
@ -177,6 +178,7 @@ static void reset_callbacks(pa_sink *s) {
s->request_rewind = NULL;
s->update_requested_latency = NULL;
s->set_port = NULL;
s->get_formats = NULL;
}
/* Called from main context */
@ -3258,3 +3260,52 @@ static void pa_sink_volume_change_rewind(pa_sink *s, size_t nbytes) {
}
pa_sink_volume_change_apply(s, NULL);
}
/* Called from the main thread */
/* Gets the list of formats supported by the sink. The members and idxset must
* be freed by the caller. */
pa_idxset* pa_sink_get_formats(pa_sink *s) {
pa_idxset *ret;
pa_assert(s);
if (s->get_formats) {
/* Sink supports format query, all is good */
ret = s->get_formats(s);
} else {
/* Sink doesn't support format query, so assume it does PCM */
pa_format_info *f = pa_format_info_new();
f->encoding = PA_ENCODING_PCM;
ret = pa_idxset_new(NULL, NULL);
pa_idxset_put(ret, f, NULL);
}
return ret;
}
/* Called from the main thread */
/* Calculates the intersection between formats supported by the sink and
* in_formats, and returns these, in the order of the sink's formats. */
pa_idxset* pa_sink_check_formats(pa_sink *s, pa_idxset *in_formats) {
pa_idxset *out_formats = pa_idxset_new(NULL, NULL), *sink_formats;
pa_format_info *f_sink, *f_in;
uint32_t i, j;
pa_assert(s);
if (!in_formats || pa_idxset_isempty(in_formats))
goto done;
sink_formats = pa_sink_get_formats(s);
PA_IDXSET_FOREACH(f_sink, sink_formats, i) {
PA_IDXSET_FOREACH(f_in, in_formats, j) {
if (pa_format_info_is_compatible(f_sink, f_in))
pa_idxset_put(out_formats, pa_format_info_copy(f_in), NULL);
}
}
done:
return out_formats;
}

7
src/pulsecore/sink.h
View file

@ -199,6 +199,10 @@ struct pa_sink {
* thread. */
int (*set_port)(pa_sink *s, pa_device_port *port); /* ditto */
/* Called to get the list of formats supported by the sink, sorted
* in descending order of preference. */
pa_idxset* (*get_formats)(pa_sink *s); /* ditto */
/* Contains copies of the above data so that the real-time worker
* thread can work without access locking */
struct {
@ -398,6 +402,9 @@ pa_queue *pa_sink_move_all_start(pa_sink *s, pa_queue *q);
void pa_sink_move_all_finish(pa_sink *s, pa_queue *q, pa_bool_t save);
void pa_sink_move_all_fail(pa_queue *q);
pa_idxset* pa_sink_get_formats(pa_sink *s);
pa_idxset* pa_sink_check_formats(pa_sink *s, pa_idxset *in_formats);
/*** To be called exclusively by the sink driver, from IO context */
void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result);