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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
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b232fbd8f8
This is where the actual changes happen. Some additional checks would be required to make sure the rate is actually supported Tested with both PCM and passthrough streams Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2004-2008 Lennart Poettering
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Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <pulsecore/module.h>
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#include <pulsecore/sink.h>
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#include <pulsecore/modargs.h>
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#include "alsa-util.h"
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#include "alsa-sink.h"
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#include "module-alsa-sink-symdef.h"
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PA_MODULE_AUTHOR("Lennart Poettering");
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PA_MODULE_DESCRIPTION("ALSA Sink");
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PA_MODULE_VERSION(PACKAGE_VERSION);
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PA_MODULE_LOAD_ONCE(FALSE);
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PA_MODULE_USAGE(
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"name=<name of the sink, to be prefixed> "
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"sink_name=<name for the sink> "
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"sink_properties=<properties for the sink> "
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"namereg_fail=<when false attempt to synthesise new sink_name if it is already taken> "
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"device=<ALSA device> "
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"device_id=<ALSA card index> "
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"format=<sample format> "
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"rate=<sample rate> "
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"alternate_rate=<alternate sample rate> "
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"channels=<number of channels> "
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"channel_map=<channel map> "
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"fragments=<number of fragments> "
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"fragment_size=<fragment size> "
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"mmap=<enable memory mapping?> "
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"tsched=<enable system timer based scheduling mode?> "
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"tsched_buffer_size=<buffer size when using timer based scheduling> "
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"tsched_buffer_watermark=<lower fill watermark> "
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"ignore_dB=<ignore dB information from the device?> "
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"control=<name of mixer control> "
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"rewind_safeguard=<number of bytes that cannot be rewound> "
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"deferred_volume=<Synchronize software and hardware volume changes to avoid momentary jumps?> "
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"deferred_volume_safety_margin=<usec adjustment depending on volume direction> "
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"deferred_volume_extra_delay=<usec adjustment to HW volume changes>");
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static const char* const valid_modargs[] = {
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"name",
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"sink_name",
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"sink_properties",
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"namereg_fail",
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"device",
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"device_id",
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"format",
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"rate",
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"alternate_rate",
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"channels",
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"channel_map",
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"fragments",
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"fragment_size",
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"mmap",
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"tsched",
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"tsched_buffer_size",
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"tsched_buffer_watermark",
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"ignore_dB",
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"control",
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"rewind_safeguard",
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"deferred_volume",
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"deferred_volume_safety_margin",
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"deferred_volume_extra_delay",
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NULL
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};
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int pa__init(pa_module*m) {
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pa_modargs *ma = NULL;
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pa_assert(m);
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pa_alsa_refcnt_inc();
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if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
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pa_log("Failed to parse module arguments");
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goto fail;
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}
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if (!(m->userdata = pa_alsa_sink_new(m, ma, __FILE__, NULL, NULL)))
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goto fail;
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pa_modargs_free(ma);
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return 0;
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fail:
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if (ma)
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pa_modargs_free(ma);
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pa__done(m);
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return -1;
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}
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int pa__get_n_used(pa_module *m) {
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pa_sink *sink;
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pa_assert(m);
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pa_assert_se(sink = m->userdata);
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return pa_sink_linked_by(sink);
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}
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void pa__done(pa_module*m) {
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pa_sink *sink;
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pa_assert(m);
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if ((sink = m->userdata))
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pa_alsa_sink_free(sink);
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pa_alsa_refcnt_dec();
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}
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