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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
/**
\unit
!Purpose
Definition of a USB Audio Loop Record Driver with two playback channels
and one record channel.
!Usage
-# Enable and setup USB related pins (see pio & board.h).
-# Configure the USB Audio Loop Record driver using
AUDDLoopRecDriver_Initialize
-# To get %audio stream frames from host, use
AUDDLoopRecDriver_Read
-# To send %audio sampling stream to host, use
AUDDLoopRecDriver_Write
*/
#ifndef AUDDLoopRecDriver_H
#define AUDDLoopRecDriver_H
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include <board.h>
#include <usb/common/core/USBGenericRequest.h>
#include <usb/device/core/USBD.h>
//------------------------------------------------------------------------------
// Definitions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// \page "Audio Loop Record stream information"
///
/// This page lists codes for USB Audio Loop Record stream information.
///
/// !Code
/// - AUDDLoopRecDriver_SAMPLERATE
/// - AUDDLoopRecDriver_NUMCHANNELS
/// - AUDDLoopRecDriver_BYTESPERSAMPLE
/// - AUDDLoopRecDriver_BITSPERSAMPLE
/// - AUDDLoopRecDriver_SAMPLESPERFRAME
/// - AUDDLoopRecDriver_BYTESPERFRAME
#if defined(at91sam7s) || defined(at91sam9xe)
/// Sample rate in Hz.
#define AUDDLoopRecDriver_SAMPLERATE 32000
/// Number of channels in audio stream.
#define AUDDLoopRecDriver_NUMCHANNELS 1
/// Number of bytes in one sample.
#define AUDDLoopRecDriver_BYTESPERSAMPLE 2
#else
/// Sample rate in Hz.
#define AUDDLoopRecDriver_SAMPLERATE 48000
/// Number of channels in audio stream.
#define AUDDLoopRecDriver_NUMCHANNELS 2
/// Number of bytes in one sample.
#define AUDDLoopRecDriver_BYTESPERSAMPLE 2
#endif
/// Number of bits in one sample.
#define AUDDLoopRecDriver_BITSPERSAMPLE (AUDDLoopRecDriver_BYTESPERSAMPLE * 8)
/// Number of bytes in one USB subframe.
#define AUDDLoopRecDriver_BYTESPERSUBFRAME (AUDDLoopRecDriver_NUMCHANNELS * \
AUDDLoopRecDriver_BYTESPERSAMPLE)
/// Number of samples in one USB frame.
#define AUDDLoopRecDriver_SAMPLESPERFRAME (AUDDLoopRecDriver_SAMPLERATE / 1000 \
* AUDDLoopRecDriver_NUMCHANNELS)
/// Number of bytes in one USB frame.
#define AUDDLoopRecDriver_BYTESPERFRAME (AUDDLoopRecDriver_SAMPLESPERFRAME * \
AUDDLoopRecDriver_BYTESPERSAMPLE)
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// \page "Audio Loop Record Channel Numbers"
///
/// This page lists codes for USB Audio Loop Record channel numbers.
///
/// !Playback channel numbers
/// - AUDDLoopRecDriver_MASTERCHANNEL
/// - AUDDLoopRecDriver_LEFTCHANNEL
/// - AUDDLoopRecDriver_RIGHTCHANNEL
///
/// !Record channel number
/// - AUDDLoopRecDriver_RECCHANNEL
/// Master channel of playback.
#define AUDDLoopRecDriver_MASTERCHANNEL 0
/// Front left channel of playback.
#define AUDDLoopRecDriver_LEFTCHANNEL 1
/// Front right channel of playback.
#define AUDDLoopRecDriver_RIGHTCHANNEL 2
/// Channel of record.
#define AUDDLoopRecDriver_RECCHANNEL 0
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Callback function for audio frames.
/// \param pArg Pointer to transfer arguments.
/// \param status Frame transfer status.
/// \return 1 to continue, 0 to stop frames.
//------------------------------------------------------------------------------
typedef char (*AUDDFrameTransferCallback)(void* pArg, char status);
//------------------------------------------------------------------------------
// Exported functions
//------------------------------------------------------------------------------
extern void AUDDLoopRecDriver_Initialize();
extern void AUDDLoopRecDriver_RequestHandler(const USBGenericRequest *request);
extern unsigned char AUDDLoopRecDriver_Read(void *buffer,
unsigned int length,
TransferCallback callback,
void *argument);
extern void AUDDLoopRecDriver_SetupWriteMbl(void * pMultiBufferList,
unsigned char **pBufferList,
unsigned short listSize,
unsigned short frameSize);
extern unsigned char AUDDLoopRecDriver_Write(void * pMbl,
unsigned short listSize,
AUDDFrameTransferCallback callback,
void *argument);
extern void AUDDLoopRecDriver_RemoteWakeUp(void);
#endif //#ifndef AUDDLoopRecDriver_H
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