mpd/src/output_all.c

309 lines
6.4 KiB
C

/*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "output_all.h"
#include "output_internal.h"
#include "output_control.h"
#include "conf.h"
#include <assert.h>
#include <string.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "output"
static struct audio_format input_audio_format;
static struct audio_output *audio_outputs;
static unsigned int num_audio_outputs;
unsigned int audio_output_count(void)
{
return num_audio_outputs;
}
struct audio_output *
audio_output_get(unsigned i)
{
assert(i < num_audio_outputs);
return &audio_outputs[i];
}
struct audio_output *
audio_output_find(const char *name)
{
for (unsigned i = 0; i < num_audio_outputs; ++i) {
struct audio_output *ao = audio_output_get(i);
if (strcmp(ao->name, name) == 0)
return ao;
}
/* name not found */
return NULL;
}
static unsigned
audio_output_config_count(void)
{
unsigned int nr = 0;
const struct config_param *param = NULL;
while ((param = config_get_next_param(CONF_AUDIO_OUTPUT, param)))
nr++;
if (!nr)
nr = 1; /* we'll always have at least one device */
return nr;
}
void
audio_output_all_init(void)
{
const struct config_param *param = NULL;
unsigned int i;
GError *error = NULL;
notify_init(&audio_output_client_notify);
num_audio_outputs = audio_output_config_count();
audio_outputs = g_new(struct audio_output, num_audio_outputs);
for (i = 0; i < num_audio_outputs; i++)
{
struct audio_output *output = &audio_outputs[i];
unsigned int j;
param = config_get_next_param(CONF_AUDIO_OUTPUT, param);
/* only allow param to be NULL if there just one audioOutput */
assert(param || (num_audio_outputs == 1));
if (!audio_output_init(output, param, &error))
g_error("line %i: %s", param->line, error->message);
/* require output names to be unique: */
for (j = 0; j < i; j++) {
if (!strcmp(output->name, audio_outputs[j].name)) {
g_error("output devices with identical "
"names: %s\n", output->name);
}
}
}
}
void
audio_output_all_finish(void)
{
unsigned int i;
for (i = 0; i < num_audio_outputs; i++) {
audio_output_finish(&audio_outputs[i]);
}
g_free(audio_outputs);
audio_outputs = NULL;
num_audio_outputs = 0;
notify_deinit(&audio_output_client_notify);
}
/**
* Determine if all (active) outputs have finished the current
* command.
*/
static bool
audio_output_all_finished(void)
{
for (unsigned i = 0; i < num_audio_outputs; ++i)
if (audio_output_is_open(&audio_outputs[i]) &&
!audio_output_command_is_finished(&audio_outputs[i]))
return false;
return true;
}
static void audio_output_wait_all(void)
{
while (!audio_output_all_finished())
notify_wait(&audio_output_client_notify);
}
/**
* Resets the "reopen" flag on all audio devices. MPD should
* immediately retry to open the device instead of waiting for the
* timeout when the user wants to start playback.
*/
static void
audio_output_all_reset_reopen(void)
{
for (unsigned i = 0; i < num_audio_outputs; ++i) {
struct audio_output *ao = &audio_outputs[i];
if (!ao->open && ao->fail_timer != NULL) {
g_timer_destroy(ao->fail_timer);
ao->fail_timer = NULL;
}
}
}
/**
* Opens all output devices which are enabled, but closed.
*
* @return true if there is at least open output device which is open
*/
static bool
audio_output_all_update(void)
{
unsigned int i;
bool ret = false;
if (!audio_format_defined(&input_audio_format))
return false;
for (i = 0; i < num_audio_outputs; ++i)
ret = audio_output_update(&audio_outputs[i],
&input_audio_format) || ret;
return ret;
}
bool
audio_output_all_play(const char *buffer, size_t length)
{
bool ret = false;
unsigned int i;
assert(length > 0);
/* no partial frames allowed */
assert((length % audio_format_frame_size(&input_audio_format)) == 0);
audio_output_all_update();
for (i = 0; i < num_audio_outputs; ++i)
if (audio_output_is_open(&audio_outputs[i]))
audio_output_play(&audio_outputs[i],
buffer, length);
while (true) {
bool finished = true;
for (i = 0; i < num_audio_outputs; ++i) {
struct audio_output *ao = &audio_outputs[i];
if (!audio_output_is_open(ao))
continue;
if (audio_output_command_is_finished(ao))
ret = true;
else {
finished = false;
audio_output_signal(ao);
}
}
if (finished)
break;
notify_wait(&audio_output_client_notify);
};
return ret;
}
bool
audio_output_all_open(const struct audio_format *audio_format)
{
bool ret = false, enabled = false;
unsigned int i;
if (audio_format != NULL)
input_audio_format = *audio_format;
audio_output_all_reset_reopen();
audio_output_all_update();
for (i = 0; i < num_audio_outputs; ++i) {
if (audio_outputs[i].enabled)
enabled = true;
if (audio_outputs[i].open)
ret = true;
}
if (!enabled)
g_warning("All audio outputs are disabled");
if (!ret)
/* close all devices if there was an error */
audio_output_all_close();
return ret;
}
void
audio_output_all_pause(void)
{
unsigned int i;
audio_output_all_update();
for (i = 0; i < num_audio_outputs; ++i)
if (audio_output_is_open(&audio_outputs[i]))
audio_output_pause(&audio_outputs[i]);
audio_output_wait_all();
}
void
audio_output_all_cancel(void)
{
unsigned int i;
audio_output_all_update();
for (i = 0; i < num_audio_outputs; ++i) {
if (audio_output_is_open(&audio_outputs[i]))
audio_output_cancel(&audio_outputs[i]);
}
audio_output_wait_all();
}
void
audio_output_all_close(void)
{
unsigned int i;
for (i = 0; i < num_audio_outputs; ++i)
audio_output_close(&audio_outputs[i]);
}
void
audio_output_all_tag(const struct tag *tag)
{
unsigned int i;
for (i = 0; i < num_audio_outputs; ++i)
if (audio_output_is_open(&audio_outputs[i]))
audio_output_send_tag(&audio_outputs[i], tag);
audio_output_wait_all();
}