pgifdec.c

瑞星微公司RK27XX系列芯片的SDK开发包

/******************************************************************************
Copyright(C)2007,Rockchip Co., Ltd. All Rights Reserved.
File:pGIFDEC.c
Desc:GIF Decoder.
Note:
Author:evan wu
$Log:
Revision 1.0  2007/09/01 evan wu
*****************************************************************************/
/****************************************************************************
*              INCLUDE                     *
 ****************************************************************************/
#if ((defined(BOARD)) || defined(ROCK_FS))
#ifndef  GIF_DEC
#define GIF_DEC

//080520,huangsl,增加include.h头文件用于 修改 __align为 ALIGN ,以便兼容 PC仿真,保留.
#include "include.h"
#include "pGIFDEC.h"
/**************************************************************************
*             GLOBAL VARIABLE                 *
**************************************************************************/
int dec_ret;

ALIGN(32) unsigned long IMAGE_ORIGIN_WIDTH;
ALIGN(32) unsigned long IMAGE_ORIGIN_HEIGHT;

/**************************************************************************
*             EXTERN VARIABLE                 *
**************************************************************************/
extern unsigned char *ImageLCDLogicBuf;
//extern LCD_RGBDATA                 gGuiDspLcdLogic[LCD_W*LCD_H];
/**************************************************************************
*             LOCAL VARIABLE                 *
**************************************************************************/
GIF_CALLBACKS_DECODE GIF_callbacks_decode_1;
/**************************************************************************
LOCAL FUNCTION
**************************************************************************/

/***************************************************************************
Name:RK_TimeDly
Desc:时间延迟
Param:int ticks
return:None
Global:None
Note:
Author:evan wu
Log:
****************************************************************************/
void RK_TimeDly(unsigned int ticks)
{

}

#define RGB565_MASK_RED        0xF800
#define RGB565_MASK_GREEN                         0x07E0
#define RGB565_MASK_BLUE                         0x001F

__inline int rgb565_2_rgb24(int rgb565)
{
    int r, g, b;
//extract RGB
    r = (rgb565 & RGB565_MASK_RED) >> 11;
    g = (rgb565 & RGB565_MASK_GREEN) >> 5;
    b = (rgb565 & RGB565_MASK_BLUE);

//amplify the image
    r <<= 3;
    g <<= 2;
    b <<= 3;

    return ((r << 16) | (g << 8) | (b));
}

void rgb565_2_rgb888(int *dst, short *src, int w, int h)
{
    int x, y;
    for (y = 0;y < h;y++)
        for (x = 0;x < w;x++)
        {
            dst[y*w+x] = rgb565_2_rgb24(src[y*w+x]);
        }
}

extern MY_FILE *SourceGIF;
extern char *Screen565_mem;
static long fpos = 0;
extern int gifSetScaleMem(char *ptr, long len);
extern unsigned char *ImageBufAddr;
//注:复用bmp，jpg的解码输出buffer ImageBufAddr，前半部分用于帧解码输出，后半部分用于备份上一帧数据
unsigned long GIFFunction(unsigned long ulSubFn, unsigned long ulParam1,
                          unsigned long ulParam2, unsigned long ulParam3,
                          unsigned long ulParam4)
{
    long i;

    switch (ulSubFn)
    {
        case IMAGE_CODEC_DECODE:
            {

                if (0 == gifDecodeOnce())
                {
                    return 0;
                }

                rgb565_2_rgb888((int*)GifBuf, (short*)Screen565_mem, LCD_WIDTH, LCD_HEIGHT);
                return(1);
            }

        case IMAGE_CODEC_OPEN_DEC:
            {
                int state = 0;
                SourceGIF = pImageFile;
                FileFuncInit();
                gif_FileBufInit();
                gifSetWH(LCD_WIDTH, LCD_HEIGHT);

                if (0 == gifSpaceAlloc())
                {
                    return (0);
                }

                // Add by HuWeiGuo, 07/12/25
                state = gifSetScaleMem((char*)ImageBufAddr, ulParam3);
                if (!state)
                {
                    return 0;
                }

                state = gifDecodeHead(); // malloc in this function
                if (state)
                {
                    return 0;
                }

                gifVarInit();

                return (1);
            }

        case IMAGE_SUBFN_CODEC_CLOSE:
            {
                gifSpaceFree();
                return(1);
            }
        default:
            {
                return(0);
            }
    }
}

/******************************************************
Name: GIFMiniatureFunction
Desc: 把输入Gif图像文件输出到gGuiDspLcdLogic为首地址的Buffer中
Param: ulSubFn,决定进入哪一个case分支
Return: 解文件头成功返回1，解头失败则返回0
Global: ImageLCDLogicBuf
Note:
Author: evan wu
Log:
******************************************************/

unsigned long GIFMiniatureFunction(unsigned long ulSubFn, int MiniatureWidth,
                                   int MiniatureHeight, unsigned char*MiniatureOutBuf,
                                   unsigned long ulParam4)
{
    long i;

    switch (ulSubFn)
    {
        case IMAGE_CODEC_DECODE:
            {

                if (0 == gifDecodeOnce())
                {
                    return 0;
                }

                rgb565_2_rgb888((int*)MiniatureOutBuf, (short*)Screen565_mem, MiniatureWidth, MiniatureHeight);
                return(1);
            }

        case IMAGE_CODEC_OPEN_DEC:
            {
                int state = 0;
                SourceGIF = pImageFile;
                FileFuncInit();
                gif_FileBufInit();
                gifSetWH(MiniatureWidth, MiniatureHeight);
                if (0 == gifSpaceAlloc())
                {
                    return (0);
                }

                // Add by HuWeiGuo, 07/12/25
                state = gifSetScaleMem((char*)ImageBufAddr, ulParam4);
                if (!state)
                {
                    return 0;
                }

                state = gifDecodeHead(); // malloc in this function
                if (state)
                {
                    return 0;
                }

                gifVarInit();

                return (1);
            }

        case IMAGE_SUBFN_CODEC_CLOSE:
            {
                gifSpaceFree();
                return(1);
            }
        default:
            {
                return(0);
            }
    }
}


#endif
#endif