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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 "decoder_control.h"
#include "player_control.h"
#include <assert.h>
void
dc_init(struct decoder_control *dc)
{
dc->thread = NULL;
dc->mutex = g_mutex_new();
dc->cond = g_cond_new();
dc->state = DECODE_STATE_STOP;
dc->command = DECODE_COMMAND_NONE;
}
void
dc_deinit(struct decoder_control *dc)
{
g_cond_free(dc->cond);
g_mutex_free(dc->mutex);
}
static void
dc_command_wait_locked(struct decoder_control *dc)
{
while (dc->command != DECODE_COMMAND_NONE)
player_wait_decoder(dc);
}
void
dc_command_wait(struct decoder_control *dc)
{
decoder_lock(dc);
dc_command_wait_locked(dc);
decoder_unlock(dc);
}
static void
dc_command_locked(struct decoder_control *dc, enum decoder_command cmd)
{
dc->command = cmd;
decoder_signal(dc);
dc_command_wait_locked(dc);
}
static void
dc_command(struct decoder_control *dc, enum decoder_command cmd)
{
decoder_lock(dc);
dc_command_locked(dc, cmd);
decoder_unlock(dc);
}
static void
dc_command_async(struct decoder_control *dc, enum decoder_command cmd)
{
decoder_lock(dc);
dc->command = cmd;
decoder_signal(dc);
decoder_unlock(dc);
}
void
dc_start(struct decoder_control *dc, struct song *song)
{
assert(dc->pipe != NULL);
assert(song != NULL);
dc->song = song;
dc_command(dc, DECODE_COMMAND_START);
}
void
dc_stop(struct decoder_control *dc)
{
decoder_lock(dc);
if (dc->command != DECODE_COMMAND_NONE)
/* Attempt to cancel the current command. If it's too
late and the decoder thread is already executing
the old command, we'll call STOP again in this
function (see below). */
dc_command_locked(dc, DECODE_COMMAND_STOP);
if (dc->state != DECODE_STATE_STOP && dc->state != DECODE_STATE_ERROR)
dc_command_locked(dc, DECODE_COMMAND_STOP);
decoder_unlock(dc);
}
bool
dc_seek(struct decoder_control *dc, double where)
{
assert(dc->state != DECODE_STATE_START);
assert(where >= 0.0);
if (dc->state == DECODE_STATE_STOP ||
dc->state == DECODE_STATE_ERROR || !dc->seekable)
return false;
dc->seek_where = where;
dc->seek_error = false;
dc_command(dc, DECODE_COMMAND_SEEK);
if (dc->seek_error)
return false;
return true;
}
void
dc_quit(struct decoder_control *dc)
{
assert(dc->thread != NULL);
dc->quit = true;
dc_command_async(dc, DECODE_COMMAND_STOP);
g_thread_join(dc->thread);
dc->thread = NULL;
}
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