/*****************************************************************************
*  Copyright Statement:
*  --------------------
*  This software is protected by Copyright and the information contained
*  herein is confidential. The software may not be copied and the information
*  contained herein may not be used or disclosed except with the written
*  permission of MediaTek Inc. (C) 2005
*
*  BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
*  THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
*  RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
*  AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
*  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
*  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
*  NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
*  SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
*  SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
*  THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
*  NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
*  SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
*
*  BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
*  LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
*  AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
*  OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY BUYER TO
*  MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
*
*  THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
*  WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
*  LAWS PRINCIPLES.  ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING THEREOF AND
*  RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
*  THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE (ICC).
*
*****************************************************************************/

/*****************************************************************************
 *
 * Filename:
 * ---------
 *   PCMRB.h
 *
 * Project:
 * --------
 *   Maui_sw
 *
 * Description:
 * ------------
 *   PCMRB utility
 *
 * Author:
 * -------
 * -------
 *============================================================================
 *             HISTORY
 * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
 *------------------------------------------------------------------------------
 * removed!
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 * removed!
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 *------------------------------------------------------------------------------
 * Upper this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
 *============================================================================
 ****************************************************************************/

#ifndef _PCMRB_DOT_H_
#define _PCMRB_DOT_H_

/*****************************************************************************
*                     C O M P I L E R   F L A G S
******************************************************************************
*/

/*****************************************************************************
*                E X T E R N A L   R E F E R E N C E S
******************************************************************************
*/
#include "common_def.h"
/*****************************************************************************
*                          C O N S T A N T S
******************************************************************************
*/

/*****************************************************************************
*                         D A T A   T Y P E S
******************************************************************************
*/
typedef struct PcmRingBufferStruct PCMRB;
struct PcmRingBufferStruct {
   int16            *buffer;
   int32            read;
   int32            write;
   int32            size;
};

/*****************************************************************************
*                        P U B L I C   D A T A
******************************************************************************
*/

/*****************************************************************************
*                             M A C R O S
******************************************************************************
*/

/*****************************************************************************
*                  D A T A   D E C L A R A T I O N S
******************************************************************************
*/

/*****************************************************************************
*              F U N C T I O N   D E C L A R A T I O N S
******************************************************************************
*/
bool PCMRB_Init( PCMRB *rb, int16 *buffer, int32 buffer_size );
int32 PCMRB_GetFreeSpace( PCMRB *rb );
int32 PCMRB_GetDataCount( PCMRB *rb );
void PCMRB_Write( PCMRB *dest_rb, int16 *src_buffer, int32 size );
void PCMRB_Read( PCMRB *src_rb, int16 *dest_buffer, int32 size );
void PCMRB_GetWriteBlock( PCMRB *dest_rb, int16 **write_ptr, int32 *write_cnt );
void PCMRB_GetReadBlock( PCMRB *src_rb, int16 **read_ptr, int32 *read_cnt );
void PCMRB_ShiftWritePointer( PCMRB *rb, int32 shamt );
void PCMRB_ShiftReadPointer( PCMRB *rb, int32 shamt );
void PCMRB_Mix( PCMRB *dest_rb, PCMRB *src_rb, int32 size );

void pcm_mix_n( int16 *dest, int16 *src, int32 n );

/*****************************************************************************
*       I N L I N E   F U N C T I O N   D E C L A R A T I O N S
******************************************************************************
*/
    
#endif // ..._PCMRB_DOT_H_