www.pudn.com > iMagic_2006_0428_v098r23.rar > wavcodec.h

/* 
*      File             : wavcodec.h 
*      Purpose          : WAV Codec 
* 
***************************************************************************** 
*/ 
#ifndef WAVCODEC_H 
#define WAVCODEC_H   
 
/* 
***************************************************************************** 
*                         INCLUDE FILES 
***************************************************************************** 
*/ 
 
  
/* 
***************************************************************************** 
*                         DEFINITION OF DATA TYPES 
***************************************************************************** 
*/ 
#define RIFF_CHUNK_NUMBER 0x52494646 		//"RIFF" 
#define WAVE_CONTAINER_TYPE_NUMBER 0x57415645	//"WAVE" 
#define FMT_CHUNK_NUMBER 0x666D7420 		//"fmt " 
#define DATA_CHUNK_NUMBER 0x64617461 		//"data" 
#define CHUNK_ID_LENGTH 4 
#define CHUNK_SIZE_LENGTH 4 
#define CHUNK_HEADER_LENGTH CHUNK_ID_LENGTH+CHUNK_SIZE_LENGTH 
#define WAVE_CONTAINER_TYPE_LENGTH 4 
#define DEFAULT_FMT_CHUNK_SIZE 14 
#define DEFAULT_ENCODER_HEADER_SIZE 44 
 
#define WAVE_BUFFER_SIZE 256*2 
#define WAVE_OUTPUT_BUFFER_ADDRESS AUDIO_SRAM_BUFFER_ADDRESS 
 
#define FMT_COMPRESSION_CODE 0 
#define FMT_NUMBER_OF_CHANNELS 2 
#define FMT_SAMPLING_RATE 4 
#define FMT_BYTE_RATE 8 
#define FMT_BLOCK_ALIGNMENT 12 
 
 
#define CHUNK_NOT_FOUNDED	-1 
 
//WAVE Format Codes 
#define Unknown_Illegal 0x0000 
#define PCM_COMPRESSION_CODE 0x0100 
#define Microsoft_ADPCM 0x0200 
#define ITU_G711_ALaw 0x0600 
#define ITU_G711_uLaw 0x0700 
#define IMA_ADPCM 0x1100 
#define ITU_G723_ADPCM 0x1400 
#define GSM_610 0x3100 
#define ITU_G721_ADPCM 0x4000 
#define MPEG_CODE 0x5000 
 
#define ADPCM_BufSize 256 
#define PCM_BufSize (((ADPCM_BufSize-4)<<1)+1) 
#define ADPCM_PACKET_HEADER_LEN 4 
#define IMA_ADPCM_BITS_PERSAMPLE 4 
#define IMA_ADPCM_CODE_MASK 0x0f 
 
#define SWAP4(x) ( ((x&0xff)<<24) | ((x&0xff00)<<8) | ((x&0xff0000)>>8) | ((x&0xff000000)>>24) ) 
#define SWAP2(x) ( ((x&0xff00)>>8) | ((x&0xff)<<8) ) 
/* 
******************************************************************************** 
*                         DECLARATION OF PROTOTYPES 
******************************************************************************** 
*/ 
 
int WavDecoder(void); 
int WavEncoder(void); 
unsigned long calculateWAVFileLength(void); 
int WavStartRecordingInf(void); 
#endif