wtaudiorecord.c

MCF5249的音频驱动程序,可以实现PCM的实时播放和采集

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <sys/time.h>
#include <signal.h>
#include <unistd.h>
#include <fcntl.h>
#include <malloc.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <signal.h>


#define _AUDIO_ADPCM_ 
//#define _AUDIO_PCM_ 
//#define _AUDIO_UPCM_ 
//#define _AUDIO_APCM_ 

//define global varible
int AudioID;

 

#define AUDIO_RECODE        // for recoder
//#define AUDIO_PLAYBACK  // for audio playback

#define DWORD unsigned long
#define BYTE  unsigned char
#define WORD unsigned short

#define INDATA_T unsigned short
#define OUTDATA_T unsigned long

typedef void AU_SEND(void* indata, OUTDATA_T* outdata,int nSrcSize, BYTE *private);
#define R4(indata, x) (indata>>((x-1)*4))
//***************************************************************
//***  for debug **
#define DEBUG 1

#ifdef DEBUG
#define PDEBUG(fmt, args...) printf(fmt,##args)
#define KDEBUG(fmt, args...) printk("KDEBUG: "fmt, ##args)
#else
#define PDEBUG(fmt, args...)
#define KDEBUG(fmt, args...)
#endif

//***************************************************************

#define VIDEOBLOCKNUM   (1024)   
#define VIDEOPACKSIZE    (528)
#define VIDEOBUFSIZE  	(sizeof(char)*VIDEOBLOCKNUM*VIDEOPACKSIZE)
#define LEAFLET 			(8)         //READ LEAFLET PACKAGE FORM VIDEO DRIVER

#define APACKCOUNT 		(512)   //(AUDIOBUFSIZE/ADSAMP_PER_PACK)
#define ADSAMP_PER_PACK ((508-4)*2+1) // 1009
#define USAMP_PER_PACK (508)
#define APCMPACKSIZE    (508)
//#define UPCMPACKSIZE 	((508-4)*2+1)
#define AUDIOBUFSIZE	(APACKCOUNT*ADSAMP_PER_PACK)
//#define AUDIOPACKSIZE (PACKSIZE*8)

#define DELAY (2)

#define RECODERSIZE (4*120)

#define	AUDIO_ENCODING_ULAW	(1)	/* ISDN u-law */
#define	AUDIO_ENCODING_ALAW	(2)	/* ISDN A-law */
#define	AUDIO_ENCODING_LINEAR (3)	/* PCM 2's-complement (0-center) */
#define AUDIO_ENCODING_ADPCM (4) /*IMA ADPCM */

#define BUFFERINC(x,y,z)  ((x+y)%z)  //z: num of package  y: inc  x: indicate

//**************************************************

typedef struct WTAudioStream{
	int coding;
	AU_SEND *AudioSend;

	BYTE * destBuffer;
	int 	   destBufSize;
	int       nDestTag;

	int nOutPSize;  //send package size
	
	char *private;	
}WTAudioStream;

typedef struct WTMediaStream{
	BYTE * srcBuffer;
	int srcBufSize;
	int nSrcTag;


	int nInPSize;  //send package size
	int nInBSize;

	WORD ChnNo;
       WORD MediaType;
       WORD FrameSize;
}WTMediaStream;

// audio device
typedef struct WTAudio_dev{
	int major;
  	int tx_irq;
 	int tx_nBufT;
 	int tx_nBufB;
  	int tx_nDmaStart;
	int tx_nDmaCount;
	//unsigned long SysDelay;
	unsigned long mmstart; //buffer base addr
	unsigned long mmsize;  //buffer size = packsize*packcount
	unsigned long dmasize; //dma buffer size = packsize*dmasize
	unsigned long packsize;	//adpcm:1009  upcm: 508
	unsigned long mmcount;  // mmsize/packsize
	unsigned long dmacount; // dmssize/packsize
#ifdef AUDIO_RECODE
	int rx_nBufT;
	int rx_nBufB;
	//int rx_nDmaCount;
	unsigned long rxmmstart; //mmstart+mmsize
	unsigned long rxmmsize;  //
	unsigned long rxpacksize; //
	unsigned long rxmmcount; //rxmmsize/rxpacksize
#endif
}WTAudio_dev;

typedef struct WTDevBufStatus{
	int tx_nBufT;
	int tx_nBufB;
	int tx_nDmaStart;
}WTDevBufStatus;

//**************************
//unsigned char *VBuffer;  //video buffer map from kernel (wtmpeg)
//unsigned char *ABuffer; //audio buffer map from kernel  (wtaudio)
//int    nVRD = 0; //indicate the read offset from video buffer base
//int    nAWR = 0;


//WTMediaStream VU_Stream = 
//					{NULL,VIDEOBUFSIZE,0,VIDEOPACKSIZE,LEAFLET,0,0,0};

//**************************

//*************************************
//** audio ioctl ***
#define IOC_MAGIC ('k')
#define IOCASTOP _IO(IOC_MAGIC,0)
#define IOCASTART _IO(IOC_MAGIC,1)
#define IOCASPACKSIZE _IOW(IOC_MAGIC,2,int)
#define IOCAGDEVBUFSTATUS _IOR(IOC_MAGIC,3,sizeof(WTDevBufStatus))
#define IOCAGDEVSTATUS _IOR(IOC_MAGIC,4,sizeof(WTAudio_dev)) 
#define IOCASRXSTART _IO(IOC_MAGIC,5)
//#define IOCASDELAYSIZE _IOW(IOC_MAGIC,5,int)
//** video ioctl ***
#define IOCVGSTATUE _IOR(IOC_MAGIC,0,int)
/***************************************************/

//******************************************
//***    globe  Function                                    ****
//******************************************

// Big-endian <==> Little-endian
#ifdef _REVERSE_
#define Reverse16(r)	(((WORD)r<<8)|((WORD)r>>8))
#else
#define Reverse16(r) (r)
#endif

//***   pointer for mem space
#define	mcf32p(r)	((DWORD *) (r))
#define	mcf16p(r)	((WORD *) (r))
#define	mcf8p(r)	((BYTE *) (r))

//***   pointer for mbar register
#define	mcfReg32p(r)	(mcf32p(MCF_MBAR + (r)))
#define	mcfReg16p(r)	(mcf16p(MCF_MBAR + (r)))
#define	mcfReg8p(r) 	(mcf8p(MCF_MBAR + (r)))

#ifdef _MCF5249_
//***   pointer for 5249 mbar2 register
#define	mcf2Reg32p(r)	(mcf32p(MCF_MBAR2 + (r)))
#define	mcf2Reg16p(r)	(mcf16p(MCF_MBAR2 + (r)))
#define	mcf2Reg8p(r) 	(mcf8p(MCF_MBAR2 + (r)))
#endif


/**********************************************************/
/***   auido  decoder/encoder                                                         */

#define	AUDIO_ENCODING_ULAW	(1)	/* ISDN u-law */
#define	AUDIO_ENCODING_ALAW	(2)	/* ISDN A-law */
#define	AUDIO_ENCODING_LINEAR (3)	/* PCM 2's-complement (0-center) */
#define AUDIO_ENCODING_ADPCM (4) /*IMA ADPCM */

/*
 * g711.c
 *
 * u-law, A-law and linear PCM conversions.
 */
#define	SIGN_BIT	(0x80)		/* Sign bit for a A-law byte. */
#define	QUANT_MASK	(0xf)		/* Quantization field mask. */
#define	NSEGS		(8)		/* Number of A-law segments. */
#define	SEG_SHIFT	(4)		/* Left shift for segment number. */
#define	SEG_MASK	(0x70)		/* Segment field mask. */
#define CLIP            (8159)

static short seg_end[8] = {0xFF, 0x1FF, 0x3FF, 0x7FF,
			    0xFFF, 0x1FFF, 0x3FFF, 0x7FFF};

static short seg_aend[8] = {0x1F, 0x3F, 0x7F, 0xFF,
			    0x1FF, 0x3FF, 0x7FF, 0xFFF};
static short seg_uend[8] = {0x3F, 0x7F, 0xFF, 0x1FF,
			    0x3FF, 0x7FF, 0xFFF, 0x1FFF};

/* copy from CCITT G.711 specifications */
unsigned char _u2a[128] = {			/* u- to A-law conversions */
	1,	1,	2,	2,	3,	3,	4,	4,
	5,	5,	6,	6,	7,	7,	8,	8,
	9,	10,	11,	12,	13,	14,	15,	16,
	17,	18,	19,	20,	21,	22,	23,	24,
	25,	27,	29,	31,	33,	34,	35,	36,
	37,	38,	39,	40,	41,	42,	43,	44,
	46,	48,	49,	50,	51,	52,	53,	54,
	55,	56,	57,	58,	59,	60,	61,	62,
	64,	65,	66,	67,	68,	69,	70,	71,
	72,	73,	74,	75,	76,	77,	78,	79,
	81,	82,	83,	84,	85,	86,	87,	88,
	89,	90,	91,	92,	93,	94,	95,	96,
	97,	98,	99,	100,	101,	102,	103,	104,
	105,	106,	107,	108,	109,	110,	111,	112,
	113,	114,	115,	116,	117,	118,	119,	120,
	121,	122,	123,	124,	125,	126,	127,	128};

unsigned char _a2u[128] = {			/* A- to u-law conversions */
	1,	3,	5,	7,	9,	11,	13,	15,
	16,	17,	18,	19,	20,	21,	22,	23,
	24,	25,	26,	27,	28,	29,	30,	31,
	32,	32,	33,	33,	34,	34,	35,	35,
	36,	37,	38,	39,	40,	41,	42,	43,
	44,	45,	46,	47,	48,	48,	49,	49,
	50,	51,	52,	53,	54,	55,	56,	57,
	58,	59,	60,	61,	62,	63,	64,	64,
	65,	66,	67,	68,	69,	70,	71,	72,
	73,	74,	75,	76,	77,	78,	79,	79,
	80,	81,	82,	83,	84,	85,	86,	87,
	88,	89,	90,	91,	92,	93,	94,	95,
	96,	97,	98,	99,	100,	101,	102,	103,
	104,	105,	106,	107,	108,	109,	110,	111,
	112,	113,	114,	115,	116,	117,	118,	119,
	120,	121,	122,	123,	124,	125,	126,	127};

static int
search(
	int		val,
	short		*table,
	int		size)
{
	int		i;

	for (i = 0; i < size; i++) {
		if (val <= *table++)
			return (i);
	}
	return (size);
}

/*
 * linear2alaw() - Convert a 16-bit linear PCM value to 8-bit A-law
 *
 * linear2alaw() accepts an 16-bit integer and encodes it as A-law data.
 *
 *		Linear Input Code	Compressed Code
 *	------------------------	---------------
 *	0000000wxyza			000wxyz
 *	0000001wxyza			001wxyz
 *	000001wxyzab			010wxyz
 *	00001wxyzabc			011wxyz
 *	0001wxyzabcd			100wxyz
 *	001wxyzabcde			101wxyz
 *	01wxyzabcdef			110wxyz
 *	1wxyzabcdefg			111wxyz
 *
 * For further information see John C. Bellamy's Digital Telephony, 1982,
 * John Wiley & Sons, pps 98-111 and 472-476.
 */
unsigned char
linear2alaw(
	int		pcm_val)	/* 2's complement (16-bit range) */
{
	int		mask;
	int		seg;
	unsigned char	aval;

	if (pcm_val >= 0) {
		mask = 0xD5;		/* sign (7th) bit = 1 */
	} else {
		mask = 0x55;		/* sign bit = 0 */
		pcm_val = -pcm_val - 8;
	}

	/* Convert the scaled magnitude to segment number. */
	seg = search(pcm_val, seg_end, 8);

	/* Combine the sign, segment, and quantization bits. */

	if (seg >= 8)		/* out of range, return maximum value. */
		return (0x7F ^ mask);
	else {
		aval = seg << SEG_SHIFT;
		if (seg < 2)
			aval |= (pcm_val >> 4) & QUANT_MASK;
		else
			aval |= (pcm_val >> (seg + 3)) & QUANT_MASK;
		return (aval ^ mask);
	}
}

/*
 * alaw2linear() - Convert an A-law value to 16-bit linear PCM
 *
 */
int
alaw2linear(
	unsigned char	a_val)
{
	int		t;
	int		seg;

	a_val ^= 0x55;

	t = (a_val & QUANT_MASK) << 4;
	seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
	switch (seg) {
	case 0:
		t += 8;
		break;
	case 1:
		t += 0x108;
		break;
	default:
		t += 0x108;
		t <<= seg - 1;
	}
	return ((a_val & SIGN_BIT) ? t : -t);
}

#define	BIAS		(0x84)		/* Bias for linear code. */

/*
 * linear2ulaw() - Convert a linear PCM value to u-law
 *
 * In order to simplify the encoding process, the original linear magnitude
 * is biased by adding 33 which shifts the encoding range from (0 - 8158) to
 * (33 - 8191). The result can be seen in the following encoding table:
 *
 *	Biased Linear Input Code	Compressed Code
 *	------------------------	---------------
 *	00000001wxyza			000wxyz
 *	0000001wxyzab			001wxyz
 *	000001wxyzabc			010wxyz
 *	00001wxyzabcd			011wxyz
 *	0001wxyzabcde			100wxyz
 *	001wxyzabcdef			101wxyz
 *	01wxyzabcdefg			110wxyz
 *	1wxyzabcdefgh			111wxyz
 *
 * Each biased linear code has a leading 1 which identifies the segment
 * number. The value of the segment number is equal to 7 minus the number
 * of leading 0's. The quantization interval is directly available as the
 * four bits wxyz.  * The trailing bits (a - h) are ignored.
 *
 * Ordinarily the complement of the resulting code word is used for
 * transmission, and so the code word is complemented before it is returned.
 *
 * For further information see John C. Bellamy's Digital Telephony, 1982,
 * John Wiley & Sons, pps 98-111 and 472-476.
 */
static inline unsigned char
linear2ulaw(short pcm_val)	/* 2's complement (16-bit range) */
{
    short		mask;
    short		seg;
    unsigned char	uval;
    
    /* Get the sign and the magnitude of the value. */
    pcm_val = pcm_val >> 2;
    if (pcm_val < 0) {
        pcm_val = -pcm_val;
        mask = 0x7F;
    } else {
        mask = 0xFF;
    }
    if ( pcm_val > CLIP ) pcm_val = CLIP;		/* clip the magnitude */
    pcm_val += (BIAS >> 2);
    
    /* Convert the scaled magnitude to segment number. */
    seg = search(pcm_val, seg_uend, 8);
    
    /*
     * Combine the sign, segment, quantization bits;
     * and complement the code word.
     */
    if (seg >= 8)		/* out of range, return maximum value. */
        return (unsigned char) (0x7F ^ mask);
    else {
        uval = (unsigned char) (seg << 4) | ((pcm_val >> (seg + 1)) & 0xF);
        return (uval ^ mask);
    }
}

/*
 * ulaw2linear() - Convert a u-law value to 16-bit linear PCM
 *
 * First, a biased linear code is derived from the code word. An unbiased
 * output can then be obtained by subtracting 33 from the biased code.
 *
 * Note that this function expects to be passed the complement of the
 * original code word. This is in keeping with ISDN conventions.
 */
int
ulaw2linear(
	unsigned char	u_val)
{
	int		t;

	/* Complement to obtain normal u-law value. */
	u_val = ~u_val;

	/*
	 * Extract and bias the quantization bits. Then
	 * shift up by the segment number and subtract out the bias.
	 */
	t = ((u_val & QUANT_MASK) << 3) + BIAS;
	t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;

	return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS));
}

/* A-law to u-law conversion */
unsigned char
alaw2ulaw(
	unsigned char	aval)
{
	aval &= 0xff;
	return ((aval & 0x80) ? (0xFF ^ _a2u[aval ^ 0xD5]) :
	    (0x7F ^ _a2u[aval ^ 0x55]));
}

/* u-law to A-law conversion */
unsigned char
ulaw2alaw(
	unsigned char	uval)
{
	uval &= 0xff;
	return ((uval & 0x80) ? (0xD5 ^ (_u2a[0xFF ^ uval] - 1)) :
	    (0x55 ^ (_u2a[0x7F ^ uval] - 1)));
}

//*******************************************
/*
*    IMA ADPCM
*/
#define CLAMP_TO_SHORT(value) \
if (value > 32767) \
    value = 32767; \
else if (value < -32768) \
    value = -32768; \

/* Intel ADPCM step variation table */
static int indexTable[16] = {
    -1, -1, -1, -1, 2, 4, 6, 8,
    -1, -1, -1, -1, 2, 4, 6, 8,
};

static int stepsizeTable[89] = {
    7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
    19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
    50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
    130, 143, 157, 173, 190, 209, 230, 253, 279, 307,