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/***
This file is part of PulseAudio.
Copyright 2004-2008 Lennart Poettering
Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <alsa/asoundlib.h>
#ifdef HAVE_VALGRIND_MEMCHECK_H
#include <valgrind/memcheck.h>
#endif
#include <pulsecore/module.h>
#include <pulsecore/modargs.h>
#include <pulsecore/log.h>
#include <pulsecore/macro.h>
#include "alsa-util.h"
#include "alsa-source.h"
PA_MODULE_AUTHOR("Lennart Poettering");
PA_MODULE_DESCRIPTION("ALSA Source");
PA_MODULE_VERSION(PACKAGE_VERSION);
PA_MODULE_LOAD_ONCE(false);
PA_MODULE_USAGE(
"name=<name for the source, to be prefixed> "
"source_name=<name for the source> "
"source_properties=<properties for the source> "
"namereg_fail=<when false attempt to synthesise new source_name if it is already taken> "
"device=<ALSA device> "
"device_id=<ALSA card index> "
"format=<sample format> "
"rate=<sample rate> "
"alternate_rate=<alternate sample rate> "
"channels=<number of channels> "
"channel_map=<channel map> "
"fragments=<number of fragments> "
"fragment_size=<fragment size> "
"mmap=<enable memory mapping?> "
"tsched=<enable system timer based scheduling mode?> "
"tsched_buffer_size=<buffer size when using timer based scheduling> "
"tsched_buffer_watermark=<upper fill watermark> "
"ignore_dB=<ignore dB information from the device?> "
"control=<name of mixer control, or name and index separated by a comma>"
"deferred_volume=<Synchronize software and hardware volume changes to avoid momentary jumps?> "
"deferred_volume_safety_margin=<usec adjustment depending on volume direction> "
"deferred_volume_extra_delay=<usec adjustment to HW volume changes> "
"fixed_latency_range=<disable latency range changes on overrun?>");
static const char* const valid_modargs[] = {
"name",
"source_name",
"source_properties",
"namereg_fail",
"device",
"device_id",
"format",
"rate",
"alternate_rate",
"channels",
"channel_map",
"fragments",
"fragment_size",
"mmap",
"tsched",
"tsched_buffer_size",
"tsched_buffer_watermark",
"ignore_dB",
"control",
"deferred_volume",
"deferred_volume_safety_margin",
"deferred_volume_extra_delay",
"fixed_latency_range",
NULL
};
int pa__init(pa_module*m) {
pa_modargs *ma = NULL;
pa_assert(m);
pa_alsa_refcnt_inc();
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log("Failed to parse module arguments");
goto fail;
}
if (!(m->userdata = pa_alsa_source_new(m, ma, __FILE__, NULL, NULL)))
goto fail;
pa_modargs_free(ma);
return 0;
fail:
if (ma)
pa_modargs_free(ma);
pa__done(m);
return -1;
}
int pa__get_n_used(pa_module *m) {
pa_source *source;
pa_assert(m);
pa_assert_se(source = m->userdata);
return pa_source_linked_by(source);
}
void pa__done(pa_module*m) {
pa_source *source;
pa_assert(m);
if ((source = m->userdata))
pa_alsa_source_free(source);
pa_alsa_refcnt_dec();
}
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