jpeg.c

以TI 公司的OMAP5910为例

//////////////////////////////////////////////////////////////////////////
//            Copyright (C) 2004, Eyoka @ Microunit
//                           All Rights Reserved
//________________________________________________________________________
//
// FILENAME:    jpeg.c
// PROJECT:     High-Resolution Video System On OMAP
// MODULE:      JPGENC.ARM
// DESCRIPTION: ARM Functions of JPEG Encoder.
// TARGET CPU:  ARM-925T of OMAP5910
// VERSION:     0.1
//________________________________________________________________________
//
// REVISE HISTORY
// DATE         VERSION AUTHOR  DESCRIPTION
// 2004-11-09   0.1     Eyoka   Created.
//////////////////////////////////////////////////////////////////////////

#include "sys.h"
#include "armdsp.h"
#include "jpeg.h"


volatile WORD g_StatusJPGENC;

//////////////////////////////////////////////////////////////////////
// JPEG ENCODER FUNCTIONS
//////////////////////////////////////////////////////////////////////

//___________________________________________________________________
// Function: JPG_BlockingEncode
// Usage: Use DSP to Encode a frame, return when encoding done.
// Parameters:
//	addrRAW			input data
//	addrJPG		out	location to store encoded data
// Return Values:
//	DWORD			size of result
//___________________________________________________________________
//
DWORD JPG_BlockingEncode(DWORD addrRAW, DWORD addrJPG)
{
	// assume that 0x10XXXXXX of ARM is mapped to 0xXXXXXX of DSP
	JPG_SRC = addrRAW & 0x00FFFFFF;
	JPG_DST = addrJPG & 0x00FFFFFF;
	
	JPG_STAT = 1;
	// mail DSP to start encoding
	if(!MBX_Write1(0, MBX1CMD_JPG_ENCODE))
	{
		puts("[!]JPG_BlockingEncode: Mailbox Write Error.");
		return 0;
	}

	// wait for encoding done
	while(JPG_STAT)
	{
		;
	}

	return JPG_SIZE;
}



// the end
//////////////////////////////////////////////////////////////////////////