/*

 * Copyright 2008-2011 Various Authors

 * Copyright 2005 Timo Hirvonen

 *

 * 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, see <http://www.gnu.org/licenses/>.

 */

#ifndef _OUTPUT_H

#define _OUTPUT_H

#include "sf.h"

#include "channelmap.h"

extern int volume_max;

extern int volume_l;

extern int volume_r;

void op_load_plugins(void);

void op_exit_plugins(void);

/*

 * select output plugin and open its mixer

 *

 * errors: OP_ERROR_{ERRNO, NO_PLUGIN}

 */

int op_select(const char *name);

int op_select_any(void);

/*

 * open selected plugin

 *

 * errors: OP_ERROR_{}

 */

int op_open(sample_format_t sf, const channel_position_t *channel_map);

/*

 * drop pcm data

 *

 * errors: OP_ERROR_{ERRNO}

 */

int op_drop(void);

/*

 * close plugin

 *

 * errors: OP_ERROR_{}

 */

int op_close(void);

/*

 * returns bytes written or error

 *

 * errors: OP_ERROR_{ERRNO}

 */

int op_write(const char *buffer, int count);

/*

 * errors: OP_ERROR_{}

 */

int op_pause(void);

int op_unpause(void);

/*

 * returns space in output buffer in bytes or -1 if busy

 */

int op_buffer_space(void);

/*

 * errors: OP_ERROR_{}

 */

int op_reset(void);

void mixer_open(void);

void mixer_close(void);

int mixer_set_volume(int left, int right);

int mixer_read_volume(void);

int mixer_get_fds(int *fds);

void op_add_options(void);

char *op_get_error_msg(int rc, const char *arg);

void op_dump_plugins(void);

const char *op_get_current(void);

#endif