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/*****************************************************************************
* vlc_aout_mixer.h : audio output mixer interface
*****************************************************************************
* Copyright (C) 2002-2009 the VideoLAN team
* $Id: 5fd2ce0953dc8814fc6e7cfa921503fb60bb917c $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Laurent Aimar <fenrir _AT_ videolan _DOT_ 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.
*****************************************************************************/
#ifndef VLC_AOUT_MIXER_H
#define VLC_AOUT_MIXER_H 1
/**
* \file
* This file defines functions, structures and macros for audio output mixer object
*/
#ifdef __cplusplus
extern "C" {
#endif
//#include <vlc_aout.h>
/* */
typedef struct aout_mixer_sys_t aout_mixer_sys_t;
typedef struct aout_mixer_t aout_mixer_t;
typedef struct {
/* Is the input to be ignored while mixing */
bool is_invalid;
/* */
aout_fifo_t fifo;
/* Pointer on the first byte of data to mix.
*
* It points in the first buffer of fifo
*/
uint8_t *begin;
/* Software multiplier */
float multiplier;
} aout_mixer_input_t;
/**
* audio output mixer
*/
struct aout_mixer_t {
VLC_COMMON_MEMBERS
/* Module */
module_t *module;
/* Mixer format.
*
* You cannot modify it.
*/
audio_sample_format_t fmt;
/* Mixer output buffer allocation method.
*
* You can override it in the open function only.
*/
aout_alloc_t allocation;
/* Multiplier used to raise or lower the volume of the sound in
* software.
*/
float multiplier;
/* Array of mixer inputs */
unsigned input_count;
aout_mixer_input_t **input;
/* Mix input into the given buffer (mandatory) */
void (*mix)(aout_mixer_t *, aout_buffer_t *);
/* Private place holder for the aout_mixer_t module (optional)
*
* A module is free to use it as it wishes.
*/
aout_mixer_sys_t *sys;
};
#ifdef __cplusplus
}
#endif
#endif
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