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/*
* Copyright (C) 2000-2001 the xine project
*
* This file is part of xine, a unix video player.
*
* xine 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.
*
* xine 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
*
* $Id: audio_out.h,v 1.3 2001/04/28 19:47:42 guenter Exp $
*/
#ifndef HAVE_AUDIO_OUT_H
#define HAVE_AUDIO_OUT_H
#include <inttypes.h>
#if defined(XINE_COMPILE)
#include "metronom.h"
#include "configfile.h"
#endif
#define AUDIO_OUT_IFACE_VERSION 1
/*
* audio output modes Used as Bitfield in AC3 decoder
*/
#define AO_MODE_AC3 1
#define AO_MODE_AC5 2
#define AO_MODE_MONO 4 /* 1 sample == 2 bytes */
#define AO_MODE_STEREO 8 /* 1 sample == 4 bytes */
#define AO_MODE_4CHANNEL 16 /* 1 sample == 8 bytes */
#define AO_MODE_5CHANNEL 32 /* 1 sample == 10 bytes */
/*
* ao_functions_s contains the functions every audio output
* driver plugin has to implement.
*/
typedef struct ao_functions_s ao_functions_t;
struct ao_functions_s {
/*
* find out what output modes are supported by this plugin
* (constants for the bit vector to return see above)
*/
uint32_t (*get_supported_modes) (ao_functions_t *this);
/*
* connect this driver to the xine engine
*/
void (*connect) (ao_functions_t *this, metronom_t *metronom);
/*
* open the driver and make it ready to receive audio data
* buffers may be flushed(!)
*
* return value: <=0 : failure, 1 : ok
*/
int (*open)(ao_functions_t *this, uint32_t bits, uint32_t rate, int mode);
/*
* write audio data to output buffer - may block
* audio driver must sync sample playback with metronom
*/
void (*write_audio_data)(ao_functions_t *this,
int16_t* audio_data, uint32_t num_samples,
uint32_t pts);
/*
* this is called when the decoder no longer uses the audio
* output driver - the driver should get ready to get opened() again
*/
void (*close)(ao_functions_t *this);
/*
* shut down this audio output driver plugin and
* free all resources allocated
*/
void (*exit) (ao_functions_t *this);
} ;
/*
* to build a dynamic audio output plugin,
* you have to implement these functions:
*
*
* ao_functions_t *init_audio_out_plugin (config_values_t *config)
*
* init this plugin, check if device is available
*
* ao_info_t *get_audio_out_plugin_info ()
*
* peek at some (static) information about the plugin without initializing it
*
*/
typedef struct ao_info_s {
int interface_version;
char *id;
char *description;
int priority;
} ao_info_t ;
#endif
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