aaci_dma.c

此压缩包为杰得开发得z228的BSP的源代码,可以实现很多功能,尤其是视频解码有很好的效果.

#include <windows.h>
#include <pkfuncs.h>
#include <ceddk.h>
#include <oalfuncs.h>
#include <dma.h>
#include "oalintr.h"
#include "wavemdd.h"
#include "pdd_audio.h"
#define DebugMsg_Normal 0x01
#define DebugMsg_Important 0x02
#define DebugMsg_Trace	0x04
#define DebugMsgMask (DebugMsg_Important)

int ReleasePlayDMA(void);
int InitPlayDMA();
int AllocPlayDMA(void);
void GetPlayBuffer( unsigned int *buf );
int InitAll();
int StartPlayDMA( unsigned int bufphy, int size ,  int* actualbuffered );
int ReleaseAll();
int AllocRecordDMA(void);
int InitRecordDMA(void);
int StartRecordDMA( LPSTR buffer , DWORD size , int* actualbuffered);
DWORD AudioDMAThread(LPVOID p);

static HANDLE DmaPlayEvent = 0;
static HANDLE PlayCmdEvent = 0;
static volatile int WaitPlayBuffer = 0;
static HANDLE DmaRecordEvent = 0;
static HANDLE RecordCmdEvent = 0;
static HANDLE RemoveCmdEvent = 0;
static volatile int PlayBufferToRemove = 0;
static volatile int WaitRecordBuffer = 0;
static volatile int DMAPlayCmd;
static volatile int DMARecordCmd;
static int TotalPlayBufferCnt = 0;
static volatile int PlayBufferPlayIndex = 0;
static volatile int PlayBufferStoreIndex = 0;

static int PlayDMAChannelNumber = -1;
static int PlayDmaIntID = 0;
static int RecordDMAChannelNumber = -1;
static int RecordDmaIntID = 0;
static HANDLE DmaThread = 0;
static HANDLE DmaRecordThread = 0;
static HANDLE RemoveThread = 0;

#define RecordTempCnt 4
#define RecordTempSize 0x1000
#define MinRecordSize 160
static char RecordTemp[RecordTempCnt][RecordTempSize];
static int  RecordSize[RecordTempCnt];
static int RecordIndex = 0;
static int RecordUsedIndex = 0;

extern void set_pa_on(void);
extern void set_pa_off(void);

WAVEFORMATEX	RecordFormat;

static int playcount = 0;
static int playedcount = 0;
int InRemove = 0;

static int recordcount = 0;
static int recordedcount = 0;
#define DMA_PLAY_STOP  0
#define DMA_PLAY_START 1
#define DMA_PLAY_EXIT  2

#define DMA_RECORD_STOP  0
#define DMA_RECORD_START 1
#define DMA_RECORD_EXIT  2

//junxz
//#define SET_SLOT12_FALSE 	AACI_RegWrite32( AACIReg_Slot12Tx, 0x00000);
//#define SET_SLOT12_TRUE 	AACI_RegWrite32( AACIReg_Slot12Tx, 0xfffff);

//#define SET_SLOT12_FALSE 	AACI_RegWrite32( AACIReg_Slot12Tx, (AACI_CodecRead16(0x54)&(~0x06))<<4);
//#define SET_SLOT12_TRUE 	AACI_RegWrite32( AACIReg_Slot12Tx, (AACI_CodecRead16(0x54)|(0x06))<<4);

static int RecordOver = 0;

static char DebugMsg[1024*512];
static int MsgLength = 0;
CRITICAL_SECTION Critical;


static void StartDebugMsg()
{
	MsgLength = 0;
	memset( DebugMsg , 0 , sizeof(DebugMsg) );
}

static void EndDebugMsg()
{
	return;
	EnterCriticalSection( &Critical );
	if( MsgLength )
	{
		char temp[256];
		FILE* fp;
		sprintf( temp , "save %d" , MsgLength );
		fp = fopen( temp , "wb" );
		if( fp )
		{
			fwrite( DebugMsg + MsgLength , 1 , sizeof(DebugMsg)-MsgLength , fp );
			fwrite( DebugMsg , 1 , MsgLength , fp );
			fclose( fp );
		}
		MsgLength = 0;
	}
	LeaveCriticalSection( &Critical );
}
static void AddDebugMsg( char* fmt, ... )
{
	char temp[256];
	int length;
	va_list args;
	return;
	EnterCriticalSection( &Critical );	
	va_start(args, fmt);
	vsprintf( temp , fmt , args);
	length = strlen( temp );
	if( MsgLength + length >= sizeof(DebugMsg) )
		MsgLength = 0;
	{
		memcpy( DebugMsg+MsgLength , temp , length );
		MsgLength += length;
		DebugMsg[MsgLength++] = '\0';
	}
	LeaveCriticalSection( &Critical );
}

int OnInit()
{
	int error = 0;
	if( InitAll() != 0 )
		error = 1;
	if( error )
	{
		DMAPlayCmd = DMA_PLAY_EXIT;
		DMARecordCmd = DMA_RECORD_EXIT;
	}
	else
	{
		DMAPlayCmd = DMA_PLAY_STOP;
		DMARecordCmd = DMA_RECORD_STOP;
	}
	InitializeCriticalSection( &Critical );
	return error;
}

int OnDeinit()
{
	int error = 0;	
	ReleaseAll();
	return error;
}

int OnRecordOpen()
{
	int error = 0;
	DMARecordCmd = DMA_RECORD_STOP;	
	recordcount = recordedcount = 0;
	RecordIndex = RecordOver = 0;
	StartDebugMsg();
	RETAILMSG( (DebugMsgMask&DebugMsg_Normal) , (TEXT( "OnRecordOpen\r\n" ) ));
	return error;
}
int OnRecordStart()
{
	int error = 0;
	DMARecordCmd = DMA_RECORD_START;
	RecordIndex = RecordUsedIndex = 0;	
	SetEvent( RecordCmdEvent );
	return error;
}
int OnRecordStop()
{
	int error = 0;
	DMARecordCmd = DMA_RECORD_STOP;
	return error;
}

int OnRecordClose()
{
	int error = 0;
	EndDebugMsg();
	DMARecordCmd = DMA_RECORD_STOP;
	SetEvent( RecordCmdEvent );
	RETAILMSG( (DebugMsgMask&DebugMsg_Normal), (TEXT( "OnRecordClose\r\n" ) ));
	return error;
}


/*
int OnPlayOpen()
{
	int error = 0;
	PlayBufferPlayIndex = PlayBufferStoreIndex = 0;
	DMAPlayCmd = DMA_PLAY_START;	
	playcount = playedcount = 0;
	StartDebugMsg();
	RETAILMSG( (DebugMsgMask&DebugMsg_Normal), (TEXT( "OnPlayOpen\r\n" ) ));
	return error;
}

int OnPlayStart()
{
	int error = 0;
	DMAPlayCmd = DMA_PLAY_START;
	RETAILMSG( (DebugMsgMask&DebugMsg_Normal), (TEXT( "OnPlayStart\r\n" ) ));
	return error;
}
int OnPlayStop()
{
	int error = 0;
	DMAPlayCmd = DMA_PLAY_STOP;
	MsgLength = 0;
	SetEvent( PlayCmdEvent );
	return error;
}
int OnPlayClose()
{
	int error = 0;
	DMAPlayCmd = DMA_PLAY_STOP;

	RETAILMSG( (DebugMsgMask&DebugMsg_Normal), (TEXT( "OnPlayClose\r\n" ) ));
	return error;
}
*/
int OnPlayOpen()
{
	int error = 0;
	PlayBufferPlayIndex = PlayBufferStoreIndex = 0;
	DMAPlayCmd = DMA_PLAY_START;	
	playcount = playedcount = 0;
	StartDebugMsg();
	RETAILMSG( (DebugMsgMask&DebugMsg_Normal), (TEXT( "OnPlayOpen\r\n" ) ));
	
	if(lout)//如果当前为喇叭输出
		AACI_CodecWrite16( 0x02, Volume&0x7fff );//控制喇叭寄存器(通过0x02控制音量)	 
	else
		AACI_CodecWrite16( 0x04, Volume&0x7fff);//控制耳机音量

	playflags=TRUE;
	if(lout==TRUE)
	{
		RETAILMSG(1, (TEXT( "OnPlayOpen---lout\r\n" ) ));
		//SET_SLOT12_TRUE;
		set_pa_on();

	}
	else
	{
		//SET_SLOT12_FALSE;
		set_pa_off();
	}
	
	return error;
}

int OnPlayStart()
{
	int error = 0;
	DMAPlayCmd = DMA_PLAY_START;
	RETAILMSG( (DebugMsgMask&DebugMsg_Normal), (TEXT( "OnPlayStart\r\n" ) ));

	if(lout)//如果当前为喇叭输出
		AACI_CodecWrite16( 0x02, Volume&0x7fff );//控制喇叭寄存器(通过0x02控制音量)	 
	else
		AACI_CodecWrite16( 0x04, Volume&0x7fff);//控制耳机音量
  
	playflags=TRUE;

	return error;
}
int OnPlayStop()
{
	int error = 0;
	DMAPlayCmd = DMA_PLAY_STOP;
	MsgLength = 0;
	SetEvent( PlayCmdEvent );

	AACI_CodecWrite16( 0x02, Volume|0x8000 );//控制喇叭寄存器(通过0x02控制音量)	 
	AACI_CodecWrite16( 0x04, Volume|0x8000);//控制耳机音量
	
	playflags=FALSE;

	return error;
}
int OnPlayClose()
{
	int error = 0;
	DMAPlayCmd = DMA_PLAY_STOP;

	RETAILMSG( (DebugMsgMask&DebugMsg_Normal), (TEXT( "OnPlayClose\r\n" ) ));

	AACI_CodecWrite16( 0x02, Volume|0x8000 );//控制喇叭寄存器(通过0x02控制音量)	 
	AACI_CodecWrite16( 0x04, Volume|0x8000);//控制耳机音量

	playflags=FALSE;
	if(lout==TRUE)
	{
		RETAILMSG(1, (TEXT( "OnPlayClose---lout\r\n" ) ));
		//SET_SLOT12_FALSE;
		set_pa_off();
	}

	return error;
}

int RemoveRecordBuffer( int toremove )
{
	PWAVEHDR g_pwh;
	int error = 0;
	LOCK_GSI(WAPI_IN);
	if( gsi[WAPI_IN].bStarted == TRUE )
	{				
		g_pwh = gsi[WAPI_IN].pwh;				
		while( g_pwh && g_pwh->dwBytesRecorded == g_pwh->dwBufferLength )
			g_pwh = g_pwh->lpNext;
		while( toremove-- && g_pwh )
		{		
			memcpy( g_pwh->lpData + g_pwh->dwBytesRecorded , 
				RecordTemp[ RecordUsedIndex ] , 
				RecordSize[ RecordUsedIndex ] );
			g_pwh->dwBytesRecorded += RecordSize[ RecordUsedIndex ];
			RecordUsedIndex = (RecordUsedIndex+1)%RecordTempCnt;
			if( g_pwh->dwBytesRecorded == g_pwh->dwBufferLength )
			{
				MARK_BUFFER_DONE(g_pwh);
				g_pwh->reserved = 0;
				g_pwh = g_pwh->lpNext;
				recordedcount ++;
				if( recordcount == recordedcount )
					RETAILMSG( 1 , (TEXT("record buffer over")));
			}
		}
		RemoveCompleteBlocks(WAPI_IN);
	}
	else
	{
		error = 1;
	}
	UNLOCK_GSI(WAPI_IN);
	return error;
}


int RemovePlayBuffer( int toremove )
{
	PWAVEHDR g_pwh;
	int error = 0;
	LOCK_GSI(WAPI_OUT);
	if( gsi[WAPI_OUT].bStarted == TRUE )
	{				
		g_pwh = gsi[WAPI_OUT].pwh;				
		while( g_pwh && g_pwh->dwBytesRecorded == g_pwh->dwBufferLength)
			g_pwh = g_pwh->lpNext;
		while( toremove-- && g_pwh )
		{				
			g_pwh->dwBytesRecorded = g_pwh->dwBufferLength;
			g_pwh = g_pwh->lpNext;