gif 图片解析绘图 RGB 转YUV 查表法 ，降低CPU占有率
【摘要】
/*----------------------------------------------------------------------File : GIFPICTURE.cPurpose : Implementation of picture widget-------------------------...
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/*
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----------------------------------------------------------------------
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File : GIFPICTURE.c
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Purpose : Implementation of picture widget
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---------------------------END-OF-HEADER------------------------------
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "gif_lib.h"
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#include "pf_layer.h"
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#include "mod_date_time.h"
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#include "mod_time_list.h"
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#include "gxdemux.h"
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#include "gxvideo.h"
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#include "gxaudio.h"
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#include "sys_assert.h"
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#include "gxdisp.h"
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#include "stb_app.h"
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#include "media_type.h"
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#include "gxdenc.h"
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#include "gxvmix.h"
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#include "av.h"
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typedef struct GifColorPalette
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{
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ByteType Red, Green, Blue;
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} GifColorPalette;
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typedef struct {
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U16 time_id;
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GifFileType *GifFile;
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const U8* pGifData;
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//unsigned int palette[256];
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GifColorPalette palette[256];
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U32 nTransColor;
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U32 CurrentImage;
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} GifData_t;
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#include "GUIType.h"
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extern unsigned char ad_pic_osd_buffer[178*100];
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extern GUI_CONST_STORAGE GUI_BITMAP ad_pic_osd_struct ;
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static GifData_t GifData;
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//extern unsigned short g_SppBuffer[700 * 576 ];
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static int InterlacedOffset[] = { 0, 4, 2, 1 }, InterlacedJumps[] = { 8, 8, 4, 2 };
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//extern BOOL bAdShowFlag;
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//extern U32 nCapturePpNum;
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static unsigned short int gif_period_time=0;
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//unsigned short disposal_mothod=0;
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#if 0
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static unsigned char y_r[256];
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static unsigned char y_g[256];
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static unsigned char y_b[256];
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static unsigned char u_r[256];
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static unsigned char u_g[256];
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static unsigned char u_b[256];
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static unsigned char v_r[256];
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static unsigned char v_g[256];
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static unsigned char v_b[256];
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static void gif_init_Palette(void)
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{
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int i=0;
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for(i=0;i<256;i++)
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{
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#if 0
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y_r[i]=66 * i/ 256;
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u_r[i]=38* i/ 256;
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v_r[i]=112 * i/ 256;
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y_g[i]=129* i/ 256;
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u_g[i]=74 * i/ 256;
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v_g[i]=94 * i/ 256;
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y_b[i]=25* i/ 256;
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u_b[i]=112 * i/ 256;
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v_b[i]=18 * i/ 256;
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#else
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y_r[i]=(66 * i)>>8;
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u_r[i]=(38* i)>>8;
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v_r[i]=(112 * i)>>8;
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y_g[i]=(129* i)>>8;
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u_g[i]=(74 * i)>>8;
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v_g[i]=(94 * i)>>8;
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y_b[i]=(25* i)>>8;
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u_b[i]=(112 * i)>>8;
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v_b[i]=(18 * i)>>8;
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#endif
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}
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}
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#endif
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static int gif_time_callback_osd(void)
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{
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//*(volatile int*)0x40005028 |= (1<<1);
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GifFileType *GifFile=GifData.GifFile;
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int i, j,ExtCode=0,Len,Row, Col, Width, Height,Count, RealWidth;
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GifRecordType RecordType;
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ByteType *Extension;
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unsigned char r,g,b ;
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//unsigned short y2,u,v;//add for trans
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//unsigned int y = 0,cb0=0,cr0 = 0;
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//unsigned short cby = 0,cry = 0;
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//unsigned short *pPicUse = (unsigned short*)g_SppBuffer;
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PixelType *Line;
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#if 0
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int color;
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unsigned int CurrentImagePalette[256];
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#else
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GifColorPalette Current_GifColorPalette[256]={{0,},};
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GifColorPalette color={0,};
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#endif
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// unsigned char nDelayTime=0;
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//SYS_PRINTF("case gif_time_callback\n");
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if (DGifGetRecordType(GifFile, &RecordType) == ERROR) {
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return TERMINATE_RECORD_ERROR;
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}
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GifFile->SWidth= ((GifFile->SWidth % 2) ? (GifFile->SWidth - 1) : (GifFile->SWidth));
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switch (RecordType) {
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case IMAGE_DESC_RECORD_TYPE:
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//SYS_PRINTF("case IMAGE_DESC_RECORD_TYPE\n");
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if (DGifGetImageDesc(GifFile) == ERROR) {
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// SYS_PRINTF("DGifGetImageDesc(GifFile) == ERROR \n");
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return TERMINATE_RECORD_ERROR;
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}
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SYS_PRINTF("pic CurrentImage = %d ITop=%d ILeft=%d IWidth=%d IHeight=%d \n", GifData.CurrentImage, GifFile->ITop, GifFile->ILeft, GifFile->IWidth, GifFile->IHeight );
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if ( GifFile->IColorMap)
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{
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SYS_PRINTF("pic use IColorMap \n");
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Len = 1 << GifFile->SBitsPerPixel;
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for (i = 0; i < Len; i++)
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{
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Current_GifColorPalette[i].Blue=GifFile->IColorMap[i].Blue;
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Current_GifColorPalette[i].Green=GifFile->IColorMap[i].Green;
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Current_GifColorPalette[i].Red=GifFile->IColorMap[i].Red;
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}
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}
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else
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{
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SYS_PRINTF("pic use SColorMap \n");
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memcpy(Current_GifColorPalette, GifData.palette, 256*sizeof(GifColorPalette));
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}
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Line = (PixelType *) malloc(GifFile->IWidth *sizeof(PixelType));
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Row = GifFile->ITop; /* Image Position relative to Screen */
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Col = GifFile->ILeft;
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Width = GifFile->IWidth;
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Height = GifFile->IHeight;
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{
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RealWidth = (GifFile->IWidth % 2)?(GifFile->IWidth - 1):GifFile->IWidth;
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for (i=0; i< GifFile->IHeight; i++)
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{
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if (DGifGetLine(GifFile, Line, GifFile->IWidth) == ERROR)
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{
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//SYS_PRINTF("pic DGifGetLine ERROR\n");
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return TERMINATE_RECORD_ERROR;
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}
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//SYS_PRINTF("%d %d %d \n", GifData.palette[Line[10]], GifData.palette[Line[13]], GifData.palette[Line[45]]);
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for(j = 0; j < RealWidth; j++)
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{
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if(GifData.CurrentImage == 0)
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{
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//if(Line[j] != GifData.nTransColor)
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ad_pic_osd_buffer[(GifFile->ITop+i)*GifFile->SWidth + GifFile->ILeft + j ]=Line[j];
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//else
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//ad_pic_osd_buffer[(GifFile->ITop+i)*GifFile->SWidth + GifFile->ILeft + j ]=0;
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}
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else
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{
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//if(Line[j] != GifData.nTransColor)
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{
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ad_pic_osd_buffer[(GifFile->ITop+i)*GifFile->SWidth + GifFile->ILeft + j ]=Line[j];
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}
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}
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}
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}
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}
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free(Line);
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GifData.CurrentImage++;
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return IMAGE_DESC_RECORD_TYPE;
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break;
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case EXTENSION_RECORD_TYPE:
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/*图形控制扩展(Graphic Control Extension)
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这一部分是可选的（需要89a版本），可以放在一个图象块(包括图象标识符、局部颜色列表和图象数据)或文本扩展块的前面，用来控制跟在它后面的第一个图象（或文本）的渲染(Render)形式，组成结构如下：
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BYTE 7 6 5 4 3 2 1 0 BIT
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扩展块标识 Extension Introducer - 标识这是一个扩展块，固定值0x21
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图形控制扩展标签 Graphic Control Label - 标识这是一个图形控制扩展块，固定值0xF9
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块大小 Block Size - 不包括块终结器，固定值4
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保留 处置方法 i
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t
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i - 用户输入标志；t - 透明色标志。
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延迟时间 Delay Time - 单位1/100秒，如果值不为1，表示暂停规定的时间后再继续往下处理数据流
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透明色索引 Transparent Color Index - 透明色索引值
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块终结器 Block Terminator - 标识块终结，固定值0
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处置方法(Disposal Method)：指出处置图形的方法，当值为：
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0 - 不使用处置方法
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1 - 不处置图形，把图形从当前位置移去
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2 - 回复到背景色
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3 - 回复到先前状态
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4-7 - 自定义
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用户输入标志(Use Input Flag)：指出是否期待用户有输入之后才继续进行下去，置位表示期待，值否表示不期待。用户输入可以是按回车键、鼠标点击等，可以和延迟时间一起使用，在设置的延迟时间内用户有输入则马上继续进行，或者没有输入直到延迟时间到达而继续
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透明颜色标志(Transparent Color Flag)：置位表示使用透明颜色
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*/
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//SYS_PRINTF("case EXTENSION_RECORD_TYPE\n");
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if (DGifGetExtension(GifFile, &ExtCode, &Extension) == ERROR) {
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return TERMINATE_RECORD_ERROR;
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}
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if(ExtCode == 0xF9)
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{
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// SYS_PRINTF("Extension[1]=0x%x\n",Extension[1]);
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//disposal_mothod=(Extension[1]&0x1c)>>2;
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if((Extension[1] & 0x01) == 1)
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{
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GifData.nTransColor = Extension[4];//nClut;
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SYS_PRINTF("GifData.nTransColor=0x%x\n",GifData.nTransColor);
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}
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gif_period_time = (Extension[3]<<8)|Extension[2];
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}
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while (Extension != NULL) {
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if (DGifGetExtensionNext(GifFile, &Extension) == ERROR) {
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return TERMINATE_RECORD_ERROR;
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}
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}
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return EXTENSION_RECORD_TYPE;
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break;
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case TERMINATE_RECORD_TYPE:
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//SYS_PRINTF("case TERMINATE_RECORD_TYPE\n");
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GifData.CurrentImage = 0;
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GifData.nTransColor=0;
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DGifSetCurrentData(GifFile, GifData.pGifData);
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return TERMINATE_RECORD_TYPE;
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break;
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default: /* Should be traps by DGifGetRecordType */
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break;
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}
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return TERMINATE_RECORD_ERROR;
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}
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int gif_drow_one_frame_osd(void);
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int gif_drow_other_frame_osd(void);
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int gif_drow_one_frame_osd(void)
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{
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int err;
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err = gif_time_callback_osd();//第一次立刻画出一帧，免得出现绿色花屏
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while(err != TERMINATE_RECORD_ERROR && err != IMAGE_DESC_RECORD_TYPE)
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//while(err != IMAGE_DESC_RECORD_TYPE)
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{
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err = gif_time_callback_osd();//第一次立刻画出一帧，免得出现绿色花屏,直到调用画第一帧图像接口
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//if(err == TERMINATE_RECORD_ERROR )
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//return 0;
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}
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return 1;
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}
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int gif_drow_other_frame_osd(void)
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{
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int err;
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//*(volatile int*)0x40005028 |= (1<<1);
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#if 0
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if(GifData.time_id)
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{
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time_release(GifData.time_id);
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GifData.time_id = 0;
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}
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#endif
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err = gif_time_callback_osd();//第一次立刻画出一帧，免得出现绿色花屏
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while(err != TERMINATE_RECORD_ERROR && err != IMAGE_DESC_RECORD_TYPE)
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//while(err != IMAGE_DESC_RECORD_TYPE)
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{
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err = gif_time_callback_osd();//第一次立刻画出一帧，免得出现绿色花屏,直到调用画第一帧图像接口
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//if(err == TERMINATE_RECORD_ERROR )
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//return 0;
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}
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// SYS_PRINTF("gif_period_time= %d \n", gif_period_time);
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if(gif_period_time==0)
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{
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gif_drow_one_frame_osd();
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// err = time_register(gif_drow_one_frame_osd, 4000, 1, ONCE_TIME, TIME_RUN_MODE_ISR, &GifData.time_id);
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}
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else
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{
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//err = time_register(gif_drow_one_frame_osd, gif_period_time*10, 1, ONCE_TIME, TIME_RUN_MODE_ISR, &GifData.time_id);
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}
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//逻辑上要保证 GifData.time_id 肯定大于0，要有先于GifData.time_id申请定时器
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//time_start(GifData.time_id);
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//SYS_PRINTF("GifData.time_id = %d \n", GifData.time_id);
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return 1;
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}
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GifFileType *GifFile;
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inline int com_gif_draw_osd(unsigned char* pGifData,int x0,int y0)
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{
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int i, j,err,Len;
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Window_Para_t window;
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//U16 time_id = 0;
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GifData.nTransColor=0;
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GifData.CurrentImage = 0;
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GifFile=GifData.GifFile = DGifOpenFileName(pGifData);
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if(GifFile == NULL)
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{
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SYS_PRINTF("不是GIF格式图片\n");
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return 0;
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}
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GifData.pGifData = DGifGetCurrentData(GifFile);
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// window.PositionX=x0;
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// window.PositionY=y0;
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ad_pic_osd_struct.XSize=GifFile->SWidth;
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ad_pic_osd_struct.YSize=GifFile->SHeight;
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GifFile->SWidth=(GifFile->SWidth % 2) ? (GifFile->SWidth - 1) : (GifFile->SWidth);
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// window.Width=GifFile->SWidth;
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// window.Height=GifFile->SHeight;
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if ( GifFile->SColorMap)
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{
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Len = 1 << GifFile->SBitsPerPixel;
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for (i = 0; i < Len; i++)
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{
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GifData.palette[i].Blue=GifFile->SColorMap[i].Blue;
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GifData.palette[i].Green=GifFile->SColorMap[i].Green;
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GifData.palette[i].Red=GifFile->SColorMap[i].Red;
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}
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}
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//5000 old
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err = gif_time_callback_osd();//第一次立刻画出一帧，免得出现绿色花屏
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//while(err != TERMINATE_RECORD_ERROR && err != IMAGE_DESC_RECORD_TYPE)
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while(err != IMAGE_DESC_RECORD_TYPE)
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{
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err = gif_time_callback_osd();//第一次立刻画出一帧，免得出现绿色花屏,直到调用画第一帧图像接口
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}
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// SYS_PRINTF("gif_period_time= %d \n", gif_period_time);
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//if(gif_period_time==0)
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//{
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// gif_drow_one_frame_osd();
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//err = time_register(gif_drow_one_frame_osd, 4000, 1, ONCE_TIME, TIME_RUN_MODE_ISR, &GifData.time_id);
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//}
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return 1;
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}
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文章来源: blog.csdn.net，作者：悟空胆好小，版权归原作者所有，如需转载，请联系作者。
原文链接：blog.csdn.net/xushx_bigbear/article/details/122730997
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