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/*
* Copyright (C) 2003-2009 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "output_control.h"
#include "output_api.h"
#include "output_internal.h"
#include "output_thread.h"
#include "mixer_control.h"
#include "mixer_plugin.h"
#include <assert.h>
#include <stdlib.h>
enum {
/** after a failure, wait this number of seconds before
automatically reopening the device */
REOPEN_AFTER = 10,
};
struct notify audio_output_client_notify;
static void ao_command_wait(struct audio_output *ao)
{
while (ao->command != AO_COMMAND_NONE) {
notify_signal(&ao->notify);
notify_wait(&audio_output_client_notify);
}
}
static void ao_command(struct audio_output *ao, enum audio_output_command cmd)
{
assert(ao->command == AO_COMMAND_NONE);
ao->command = cmd;
ao_command_wait(ao);
}
/**
* Like ao_command(), but assumes the object is locked by the caller.
*/
static void
ao_command_locked(struct audio_output *ao, enum audio_output_command cmd)
{
assert(ao->command == AO_COMMAND_NONE);
ao->command = cmd;
g_mutex_unlock(ao->mutex);
ao_command_wait(ao);
g_mutex_lock(ao->mutex);
}
static void ao_command_async(struct audio_output *ao,
enum audio_output_command cmd)
{
assert(ao->command == AO_COMMAND_NONE);
ao->command = cmd;
notify_signal(&ao->notify);
}
static void
audio_output_close_locked(struct audio_output *ao);
/**
* Object must be locked (and unlocked) by the caller.
*/
static bool
audio_output_open(struct audio_output *ao,
const struct audio_format *audio_format,
const struct music_pipe *mp)
{
bool open;
assert(mp != NULL);
if (ao->fail_timer != NULL) {
g_timer_destroy(ao->fail_timer);
ao->fail_timer = NULL;
}
if (ao->open &&
audio_format_equals(audio_format, &ao->in_audio_format)) {
assert(ao->pipe == mp);
if (ao->pause) {
/* unpause with the CANCEL command; this is a
hack, but suits well for forcing the thread
to leave the ao_pause() thread, and we need
to flush the device buffer anyway */
/* we're not using audio_output_cancel() here,
because that function is asynchronous */
ao_command_locked(ao, AO_COMMAND_CANCEL);
}
return true;
}
ao->in_audio_format = *audio_format;
ao->chunk = NULL;
if (!ao->config_audio_format) {
if (ao->open)
audio_output_close_locked(ao);
/* no audio format is configured: copy in->out, let
the output's open() method determine the effective
out_audio_format */
ao->out_audio_format = ao->in_audio_format;
}
ao->pipe = mp;
if (ao->thread == NULL)
audio_output_thread_start(ao);
open = ao->open;
if (!open) {
ao_command_locked(ao, AO_COMMAND_OPEN);
open = ao->open;
}
if (open && ao->mixer != NULL)
mixer_open(ao->mixer);
return open;
}
bool
audio_output_update(struct audio_output *ao,
const struct audio_format *audio_format,
const struct music_pipe *mp)
{
assert(mp != NULL);
g_mutex_lock(ao->mutex);
if (ao->enabled) {
if (ao->fail_timer == NULL ||
g_timer_elapsed(ao->fail_timer, NULL) > REOPEN_AFTER) {
bool ret = audio_output_open(ao, audio_format, mp);
g_mutex_unlock(ao->mutex);
return ret;
}
} else if (audio_output_is_open(ao))
audio_output_close_locked(ao);
g_mutex_unlock(ao->mutex);
return false;
}
void
audio_output_play(struct audio_output *ao)
{
if (!ao->open)
return;
notify_signal(&ao->notify);
}
void audio_output_pause(struct audio_output *ao)
{
if (ao->mixer != NULL && ao->plugin->pause == NULL)
/* the device has no pause mode: close the mixer,
unless its "global" flag is set (checked by
mixer_auto_close()) */
mixer_auto_close(ao->mixer);
ao_command_async(ao, AO_COMMAND_PAUSE);
}
void audio_output_cancel(struct audio_output *ao)
{
ao_command_async(ao, AO_COMMAND_CANCEL);
}
static void
audio_output_close_locked(struct audio_output *ao)
{
assert(ao != NULL);
assert(!ao->open || ao->fail_timer == NULL);
if (ao->mixer != NULL)
mixer_auto_close(ao->mixer);
if (ao->open)
ao_command_locked(ao, AO_COMMAND_CLOSE);
else if (ao->fail_timer != NULL) {
g_timer_destroy(ao->fail_timer);
ao->fail_timer = NULL;
}
}
void audio_output_close(struct audio_output *ao)
{
assert(ao != NULL);
assert(!ao->open || ao->fail_timer == NULL);
g_mutex_lock(ao->mutex);
audio_output_close_locked(ao);
g_mutex_unlock(ao->mutex);
}
void audio_output_finish(struct audio_output *ao)
{
audio_output_close(ao);
assert(ao->fail_timer == NULL);
if (ao->thread != NULL) {
ao_command(ao, AO_COMMAND_KILL);
g_thread_join(ao->thread);
}
if (ao->mixer != NULL)
mixer_free(ao->mixer);
ao_plugin_finish(ao->plugin, ao->data);
notify_deinit(&ao->notify);
g_mutex_free(ao->mutex);
}
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