/* ----------------------------------------------------------------------------
 *         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.
 * ----------------------------------------------------------------------------
 */

#ifndef WAV_H
#define WAV_H

//------------------------------------------------------------------------------
//         Exported types
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
/// Standard WAV file header information.
//------------------------------------------------------------------------------
typedef struct _WavHeader
{
    /// Contains the letters "RIFF" in ASCII form.
    unsigned int  chunkID;
    /// Size of the rest of the chunk following this number.
    unsigned int  chunkSize;
    /// Contains the letters "WAVE".
    unsigned int format;
    /// Contains the letters "fmt ".
    unsigned int subchunk1ID;
    /// 16 for PCM.  This is the size of the rest of the Subchunk
    /// which follows this number.
    unsigned int  subchunk1Size;
    /// PCM = 1 (i.e. Linear quantization). Values other than 1 indicate some
    /// form of compression.
    unsigned short audioFormat;
    /// Mono = 1, Stereo = 2, etc.
    unsigned short numChannels;
    /// 8000, 44100, etc.
    unsigned int   sampleRate;
    /// SampleRate * NumChannels * BitsPerSample/8
    unsigned int   byteRate;
    /// NumChannels * BitsPerSample/8
    unsigned short blockAlign; 
    /// 8 bits = 8, 16 bits = 16, etc.
    unsigned short bitsPerSample;
    /// Contains the letters "data".
    unsigned int subchunk2ID;
    /// Number of bytes in the data.
    unsigned int subchunk2Size;

} WavHeader;

#define WAV_HEADER_SIZE 0x100

//------------------------------------------------------------------------------
//         Exported functions
//------------------------------------------------------------------------------

extern unsigned char WAV_IsValid(const WavHeader *header);

extern void WAV_DisplayInfo(const WavHeader *header);

#endif //#ifndef WAV_H