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capture: Add the passthrough format negotiation to capture streams.

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This helps to keep the API more symmetrical and also potentially
allows support for passthrough monitor sources at some point in the future.
This commit is contained in:
Colin Guthrie 2011-05-17 21:56:10 +01:00
parent 30597b7c27
commit 5d35375aa7
18 changed files with 406 additions and 104 deletions
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92
src/pulsecore/source.c
View file

@ -32,6 +32,7 @@
#include <pulse/xmalloc.h>
#include <pulse/timeval.h>
#include <pulse/util.h>
#include <pulse/internal.h>
#include <pulsecore/core-util.h>
#include <pulsecore/source-output.h>
@ -130,6 +131,7 @@ static void reset_callbacks(pa_source *s) {
s->set_mute = NULL;
s->update_requested_latency = NULL;
s->set_port = NULL;
s->get_formats = NULL;
}
/* Called from main context */
@ -754,6 +756,15 @@ pa_usec_t pa_source_get_latency_within_thread(pa_source *s) {
return usec;
}
/* Called from main context */
pa_bool_t pa_source_is_passthrough(pa_source *s) {
pa_source_assert_ref(s);
/* NB Currently only monitor sources support passthrough mode */
return (s->monitor_of && pa_sink_is_passthrough(s->monitor_of));
}
/* Called from main thread */
void pa_source_set_volume(
pa_source *s,
@ -1575,3 +1586,84 @@ int pa_source_set_port(pa_source *s, const char *name, pa_bool_t save) {
return 0;
}
/* Called from the main thread */
/* Gets the list of formats supported by the source. The members and idxset must
* be freed by the caller. */
pa_idxset* pa_source_get_formats(pa_source *s) {
pa_idxset *ret;
pa_assert(s);
if (s->get_formats) {
/* Source supports format query, all is good */
ret = s->get_formats(s);
} else {
/* Source 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 */
/* Checks if the source can accept this format */
pa_bool_t pa_source_check_format(pa_source *s, pa_format_info *f)
{
pa_idxset *formats = NULL;
pa_bool_t ret = FALSE;
pa_assert(s);
pa_assert(f);
formats = pa_source_get_formats(s);
if (formats) {
pa_format_info *finfo_device;
uint32_t i;
PA_IDXSET_FOREACH(finfo_device, formats, i) {
if (pa_format_info_is_compatible(finfo_device, f)) {
ret = TRUE;
break;
}
}
pa_idxset_free(formats, (pa_free2_cb_t) pa_format_info_free2, NULL);
}
return ret;
}
/* Called from the main thread */
/* Calculates the intersection between formats supported by the source and
* in_formats, and returns these, in the order of the source's formats. */
pa_idxset* pa_source_check_formats(pa_source *s, pa_idxset *in_formats) {
pa_idxset *out_formats = pa_idxset_new(NULL, NULL), *source_formats = NULL;
pa_format_info *f_source, *f_in;
uint32_t i, j;
pa_assert(s);
if (!in_formats || pa_idxset_isempty(in_formats))
goto done;
source_formats = pa_source_get_formats(s);
PA_IDXSET_FOREACH(f_source, source_formats, i) {
PA_IDXSET_FOREACH(f_in, in_formats, j) {
if (pa_format_info_is_compatible(f_source, f_in))
pa_idxset_put(out_formats, pa_format_info_copy(f_in), NULL);
}
}
done:
if (source_formats)
pa_idxset_free(source_formats, (pa_free2_cb_t) pa_format_info_free2, NULL);
return out_formats;
}