602 lines
12 KiB
C
602 lines
12 KiB
C
/*
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* Copyright (C) 2003-2010 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "output_all.h"
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#include "output_internal.h"
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#include "output_control.h"
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#include "chunk.h"
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#include "conf.h"
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#include "pipe.h"
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#include "buffer.h"
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#include "player_control.h"
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#include "mpd_error.h"
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#ifndef NDEBUG
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#include "chunk.h"
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#endif
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#include <assert.h>
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#include <string.h>
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "output"
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static struct audio_format input_audio_format;
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static struct audio_output *audio_outputs;
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static unsigned int num_audio_outputs;
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/**
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* The #music_buffer object where consumed chunks are returned.
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*/
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static struct music_buffer *g_music_buffer;
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/**
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* The #music_pipe object which feeds all audio outputs. It is filled
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* by audio_output_all_play().
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*/
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static struct music_pipe *g_mp;
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/**
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* The "elapsed_time" stamp of the most recently finished chunk.
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*/
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static float audio_output_all_elapsed_time = -1.0;
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unsigned int audio_output_count(void)
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{
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return num_audio_outputs;
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}
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struct audio_output *
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audio_output_get(unsigned i)
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{
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assert(i < num_audio_outputs);
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return &audio_outputs[i];
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}
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struct audio_output *
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audio_output_find(const char *name)
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{
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for (unsigned i = 0; i < num_audio_outputs; ++i) {
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struct audio_output *ao = audio_output_get(i);
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if (strcmp(ao->name, name) == 0)
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return ao;
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}
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/* name not found */
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return NULL;
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}
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static unsigned
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audio_output_config_count(void)
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{
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unsigned int nr = 0;
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const struct config_param *param = NULL;
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while ((param = config_get_next_param(CONF_AUDIO_OUTPUT, param)))
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nr++;
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if (!nr)
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nr = 1; /* we'll always have at least one device */
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return nr;
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}
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void
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audio_output_all_init(void)
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{
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const struct config_param *param = NULL;
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unsigned int i;
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GError *error = NULL;
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notify_init(&audio_output_client_notify);
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num_audio_outputs = audio_output_config_count();
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audio_outputs = g_new(struct audio_output, num_audio_outputs);
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for (i = 0; i < num_audio_outputs; i++)
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{
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struct audio_output *output = &audio_outputs[i];
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unsigned int j;
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param = config_get_next_param(CONF_AUDIO_OUTPUT, param);
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/* only allow param to be NULL if there just one audioOutput */
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assert(param || (num_audio_outputs == 1));
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if (!audio_output_init(output, param, &error)) {
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if (param != NULL)
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MPD_ERROR("line %i: %s",
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param->line, error->message);
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else
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MPD_ERROR("%s", error->message);
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}
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/* require output names to be unique: */
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for (j = 0; j < i; j++) {
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if (!strcmp(output->name, audio_outputs[j].name)) {
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MPD_ERROR("output devices with identical "
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"names: %s\n", output->name);
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}
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}
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}
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}
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void
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audio_output_all_finish(void)
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{
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unsigned int i;
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for (i = 0; i < num_audio_outputs; i++) {
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audio_output_disable(&audio_outputs[i]);
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audio_output_finish(&audio_outputs[i]);
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}
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g_free(audio_outputs);
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audio_outputs = NULL;
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num_audio_outputs = 0;
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notify_deinit(&audio_output_client_notify);
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}
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void
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audio_output_all_enable_disable(void)
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{
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for (unsigned i = 0; i < num_audio_outputs; i++) {
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struct audio_output *ao = &audio_outputs[i];
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bool enabled;
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g_mutex_lock(ao->mutex);
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enabled = ao->really_enabled;
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g_mutex_unlock(ao->mutex);
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if (ao->enabled != enabled) {
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if (ao->enabled)
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audio_output_enable(ao);
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else
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audio_output_disable(ao);
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}
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}
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}
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/**
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* Determine if all (active) outputs have finished the current
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* command.
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*/
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static bool
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audio_output_all_finished(void)
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{
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for (unsigned i = 0; i < num_audio_outputs; ++i) {
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struct audio_output *ao = &audio_outputs[i];
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bool not_finished;
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g_mutex_lock(ao->mutex);
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not_finished = audio_output_is_open(ao) &&
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!audio_output_command_is_finished(ao);
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g_mutex_unlock(ao->mutex);
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if (not_finished)
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return false;
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}
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return true;
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}
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static void audio_output_wait_all(void)
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{
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while (!audio_output_all_finished())
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notify_wait(&audio_output_client_notify);
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}
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/**
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* Signal the audio output if it is open, and set the "allow_play"
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* flag. This function locks the mutex.
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*/
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static void
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audio_output_lock_signal(struct audio_output *ao)
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{
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g_mutex_lock(ao->mutex);
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ao->allow_play = true;
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if (audio_output_is_open(ao))
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g_cond_signal(ao->cond);
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g_mutex_unlock(ao->mutex);
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}
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/**
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* Signals all audio outputs which are open.
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*/
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static void
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audio_output_signal_all(void)
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{
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for (unsigned i = 0; i < num_audio_outputs; ++i)
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audio_output_lock_signal(&audio_outputs[i]);
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}
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static void
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audio_output_reset_reopen(struct audio_output *ao)
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{
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g_mutex_lock(ao->mutex);
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if (!ao->open && ao->fail_timer != NULL) {
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g_timer_destroy(ao->fail_timer);
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ao->fail_timer = NULL;
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}
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g_mutex_unlock(ao->mutex);
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}
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/**
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* Resets the "reopen" flag on all audio devices. MPD should
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* immediately retry to open the device instead of waiting for the
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* timeout when the user wants to start playback.
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*/
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static void
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audio_output_all_reset_reopen(void)
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{
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for (unsigned i = 0; i < num_audio_outputs; ++i) {
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struct audio_output *ao = &audio_outputs[i];
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audio_output_reset_reopen(ao);
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}
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}
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/**
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* Opens all output devices which are enabled, but closed.
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*
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* @return true if there is at least open output device which is open
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*/
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static bool
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audio_output_all_update(void)
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{
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unsigned int i;
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bool ret = false;
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if (!audio_format_defined(&input_audio_format))
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return false;
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for (i = 0; i < num_audio_outputs; ++i)
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ret = audio_output_update(&audio_outputs[i],
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&input_audio_format, g_mp) || ret;
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return ret;
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}
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bool
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audio_output_all_play(struct music_chunk *chunk)
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{
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bool ret;
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unsigned int i;
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assert(g_music_buffer != NULL);
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assert(g_mp != NULL);
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assert(chunk != NULL);
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assert(music_chunk_check_format(chunk, &input_audio_format));
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ret = audio_output_all_update();
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if (!ret)
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return false;
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music_pipe_push(g_mp, chunk);
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for (i = 0; i < num_audio_outputs; ++i)
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audio_output_play(&audio_outputs[i]);
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return true;
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}
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bool
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audio_output_all_open(const struct audio_format *audio_format,
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struct music_buffer *buffer)
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{
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bool ret = false, enabled = false;
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unsigned int i;
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assert(audio_format != NULL);
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assert(buffer != NULL);
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assert(g_music_buffer == NULL || g_music_buffer == buffer);
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assert((g_mp == NULL) == (g_music_buffer == NULL));
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g_music_buffer = buffer;
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/* the audio format must be the same as existing chunks in the
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pipe */
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assert(g_mp == NULL || music_pipe_check_format(g_mp, audio_format));
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if (g_mp == NULL)
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g_mp = music_pipe_new();
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else
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/* if the pipe hasn't been cleared, the the audio
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format must not have changed */
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assert(music_pipe_empty(g_mp) ||
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audio_format_equals(audio_format,
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&input_audio_format));
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input_audio_format = *audio_format;
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audio_output_all_reset_reopen();
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audio_output_all_enable_disable();
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audio_output_all_update();
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for (i = 0; i < num_audio_outputs; ++i) {
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if (audio_outputs[i].enabled)
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enabled = true;
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if (audio_outputs[i].open)
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ret = true;
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}
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if (!enabled)
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g_warning("All audio outputs are disabled");
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if (!ret)
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/* close all devices if there was an error */
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audio_output_all_close();
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return ret;
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}
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/**
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* Has the specified audio output already consumed this chunk?
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*/
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static bool
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chunk_is_consumed_in(const struct audio_output *ao,
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const struct music_chunk *chunk)
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{
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if (!ao->open)
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return true;
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if (ao->chunk == NULL)
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return false;
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assert(chunk == ao->chunk || music_pipe_contains(g_mp, ao->chunk));
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if (chunk != ao->chunk) {
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assert(chunk->next != NULL);
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return true;
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}
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return ao->chunk_finished && chunk->next == NULL;
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}
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/**
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* Has this chunk been consumed by all audio outputs?
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*/
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static bool
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chunk_is_consumed(const struct music_chunk *chunk)
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{
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for (unsigned i = 0; i < num_audio_outputs; ++i) {
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const struct audio_output *ao = &audio_outputs[i];
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bool consumed;
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g_mutex_lock(ao->mutex);
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consumed = chunk_is_consumed_in(ao, chunk);
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g_mutex_unlock(ao->mutex);
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if (!consumed)
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return false;
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}
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return true;
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}
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/**
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* There's only one chunk left in the pipe (#g_mp), and all audio
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* outputs have consumed it already. Clear the reference.
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*/
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static void
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clear_tail_chunk(G_GNUC_UNUSED const struct music_chunk *chunk, bool *locked)
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{
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assert(chunk->next == NULL);
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assert(music_pipe_contains(g_mp, chunk));
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for (unsigned i = 0; i < num_audio_outputs; ++i) {
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struct audio_output *ao = &audio_outputs[i];
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/* this mutex will be unlocked by the caller when it's
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ready */
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g_mutex_lock(ao->mutex);
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locked[i] = ao->open;
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if (!locked[i]) {
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g_mutex_unlock(ao->mutex);
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continue;
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}
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assert(ao->chunk == chunk);
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assert(ao->chunk_finished);
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ao->chunk = NULL;
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}
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}
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unsigned
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audio_output_all_check(void)
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{
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const struct music_chunk *chunk;
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bool is_tail;
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struct music_chunk *shifted;
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bool locked[num_audio_outputs];
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assert(g_music_buffer != NULL);
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assert(g_mp != NULL);
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while ((chunk = music_pipe_peek(g_mp)) != NULL) {
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assert(!music_pipe_empty(g_mp));
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if (!chunk_is_consumed(chunk))
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/* at least one output is not finished playing
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this chunk */
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return music_pipe_size(g_mp);
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if (chunk->length > 0 && chunk->times >= 0.0)
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/* only update elapsed_time if the chunk
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provides a defined value */
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audio_output_all_elapsed_time = chunk->times;
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is_tail = chunk->next == NULL;
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if (is_tail)
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/* this is the tail of the pipe - clear the
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chunk reference in all outputs */
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clear_tail_chunk(chunk, locked);
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/* remove the chunk from the pipe */
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shifted = music_pipe_shift(g_mp);
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assert(shifted == chunk);
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if (is_tail)
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/* unlock all audio outputs which were locked
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by clear_tail_chunk() */
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for (unsigned i = 0; i < num_audio_outputs; ++i)
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if (locked[i])
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g_mutex_unlock(audio_outputs[i].mutex);
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/* return the chunk to the buffer */
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music_buffer_return(g_music_buffer, shifted);
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}
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return 0;
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}
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bool
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audio_output_all_wait(unsigned threshold)
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{
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player_lock();
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if (audio_output_all_check() < threshold) {
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player_unlock();
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return true;
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}
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player_wait();
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player_unlock();
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return audio_output_all_check() < threshold;
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}
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void
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audio_output_all_pause(void)
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{
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unsigned int i;
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audio_output_all_update();
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for (i = 0; i < num_audio_outputs; ++i)
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audio_output_pause(&audio_outputs[i]);
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audio_output_wait_all();
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}
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void
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audio_output_all_drain(void)
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{
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for (unsigned i = 0; i < num_audio_outputs; ++i)
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audio_output_drain_async(&audio_outputs[i]);
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audio_output_wait_all();
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}
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void
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audio_output_all_cancel(void)
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{
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unsigned int i;
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/* send the cancel() command to all audio outputs */
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for (i = 0; i < num_audio_outputs; ++i)
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audio_output_cancel(&audio_outputs[i]);
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audio_output_wait_all();
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/* clear the music pipe and return all chunks to the buffer */
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if (g_mp != NULL)
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music_pipe_clear(g_mp, g_music_buffer);
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/* the audio outputs are now waiting for a signal, to
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synchronize the cleared music pipe */
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audio_output_signal_all();
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/* invalidate elapsed_time */
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audio_output_all_elapsed_time = -1.0;
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}
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void
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audio_output_all_close(void)
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{
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unsigned int i;
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for (i = 0; i < num_audio_outputs; ++i)
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audio_output_close(&audio_outputs[i]);
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if (g_mp != NULL) {
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assert(g_music_buffer != NULL);
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music_pipe_clear(g_mp, g_music_buffer);
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music_pipe_free(g_mp);
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g_mp = NULL;
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}
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g_music_buffer = NULL;
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audio_format_clear(&input_audio_format);
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audio_output_all_elapsed_time = -1.0;
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}
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void
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audio_output_all_release(void)
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{
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unsigned int i;
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for (i = 0; i < num_audio_outputs; ++i)
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audio_output_release(&audio_outputs[i]);
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if (g_mp != NULL) {
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assert(g_music_buffer != NULL);
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music_pipe_clear(g_mp, g_music_buffer);
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music_pipe_free(g_mp);
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g_mp = NULL;
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}
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g_music_buffer = NULL;
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audio_format_clear(&input_audio_format);
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audio_output_all_elapsed_time = -1.0;
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}
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void
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audio_output_all_song_border(void)
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{
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/* clear the elapsed_time pointer at the beginning of a new
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song */
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audio_output_all_elapsed_time = 0.0;
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}
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float
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audio_output_all_get_elapsed_time(void)
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{
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return audio_output_all_elapsed_time;
|
|
}
|