?? display.c
字號:
{#ifdef SH_MEM if (Shmem_Flag) { XShmDetach(Display_Ptr, &Shminfo1); XDestroyImage(Ximage_Ptr); shmdt(Shminfo1.shmaddr); if (!progressive_sequence) { XShmDetach(Display_Ptr, &Shminfo2); XDestroyImage(Ximage_Ptr2); shmdt(Shminfo2.shmaddr); } }#endif}static void Display_Image(Ximage_Ptr,Dithered_Image)XImage *Ximage_Ptr;unsigned char *Dithered_Image;{ /* display dithered image */#ifdef SH_MEM if (Shmem_Flag) { XShmPutImage(Display_Ptr, Window_Instance, GC_Instance, Ximage_Ptr, 0, 0, 0, 0, Ximage_Ptr->width, Ximage_Ptr->height, True); XFlush(Display_Ptr); while (1) { XEvent xev; XNextEvent(Display_Ptr, &xev); if (xev.type == CompletionType) break; } } else #endif { Ximage_Ptr->data = (char *) Dithered_Image; XPutImage(Display_Ptr, Window_Instance, GC_Instance, Ximage_Ptr, 0, 0, 0, 0, Ximage_Ptr->width, Ximage_Ptr->height); }}void Display_Second_Field(){ Display_Image(Ximage_Ptr2,Dithered_Image2);}/* 4x4 ordered dither * * threshold pattern: * 0 8 2 10 * 12 4 14 6 * 3 11 1 9 * 15 7 13 5 */void Initialize_Dither_Matrix(){ int i, v; for (i=-8; i<256+8; i++) { v = i>>4; if (v<1) v = 1; else if (v>14) v = 14; Y_Table[i+8] = v<<4; } for (i=0; i<128+16; i++) { v = (i-40)>>4; if (v<0) v = 0; else if (v>3) v = 3; Cb_Table[i] = v<<2; Cr_Table[i] = v; }}void dither(src)unsigned char *src[];{ /* should this test only the display flag, not progressive_sequence ? --CF */ /* CHANGE 95/05/13: progressive_sequence -> progressive_frame */ if( progressive_frame || Display_Progressive_Flag) Dither_Frame(src); else { if ((picture_structure==FRAME_PICTURE && top_field_first) || picture_structure==BOTTOM_FIELD) { /* top field first */ if (chroma_format==CHROMA420 && hiQdither) { Dither_Top_Field420(src,Dithered_Image); Dither_Bottom_Field420(src,Dithered_Image2); } else { Dither_Top_Field(src,Dithered_Image); Dither_Bottom_Field(src,Dithered_Image2); } } else { /* bottom field first */ if (chroma_format==CHROMA420 && hiQdither) { Dither_Bottom_Field420(src,Dithered_Image); Dither_Top_Field420(src,Dithered_Image2); } else { Dither_Bottom_Field(src,Dithered_Image); Dither_Top_Field(src,Dithered_Image2); } } } Display_Image(Ximage_Ptr,Dithered_Image);}static void Dither_Frame(src)unsigned char *src[];{ int i,j; int y,u,v; unsigned char *py,*pu,*pv,*dst; py = src[0]; pu = src[1]; pv = src[2]; dst = Dithered_Image; for (j=0; j<Coded_Picture_Height; j+=4) { /* line j + 0 */ for (i=0; i<Coded_Picture_Width; i+=4) { y = *py++; u = *pu++ >> 1; v = *pv++ >> 1; *dst++ = Pixel[Y_Table[y]|Cb_Table[u]|Cr_Table[v]]; y = *py++; if (chroma_format==CHROMA444) { u = *pu++ >> 1; v = *pv++ >> 1; } *dst++ = Pixel[Y_Table[y+8]|Cb_Table[u+8]|Cr_Table[v+8]]; y = *py++; u = *pu++ >> 1; v = *pv++ >> 1; *dst++ = Pixel[Y_Table[y+2]|Cb_Table[u+2]|Cr_Table[v+2]]; y = *py++; if (chroma_format==CHROMA444) { u = *pu++ >> 1; v = *pv++ >> 1; } *dst++ = Pixel[Y_Table[y+10]|Cb_Table[u+10]|Cr_Table[v+10]]; } if (chroma_format==CHROMA420) { pu -= Chroma_Width; pv -= Chroma_Width; } /* line j + 1 */ for (i=0; i<Coded_Picture_Width; i+=4) { y = *py++; u = *pu++ >> 1; v = *pv++ >> 1; *dst++ = Pixel[Y_Table[y+12]|Cb_Table[u+12]|Cr_Table[v+12]]; y = *py++; if (chroma_format==CHROMA444) { u = *pu++ >> 1; v = *pv++ >> 1; } *dst++ = Pixel[Y_Table[y+4]|Cb_Table[u+4]|Cr_Table[v+4]]; y = *py++; u = *pu++ >> 1; v = *pv++ >> 1; *dst++ = Pixel[Y_Table[y+14]|Cb_Table[u+14]|Cr_Table[v+14]]; y = *py++; if (chroma_format==CHROMA444) { u = *pu++ >> 1; v = *pv++ >> 1; } *dst++ = Pixel[Y_Table[y+6]|Cb_Table[u+6]|Cr_Table[v+6]]; } /* line j + 2 */ for (i=0; i<Coded_Picture_Width; i+=4) { y = *py++; u = *pu++ >> 1; v = *pv++ >> 1; *dst++ = Pixel[Y_Table[y+3]|Cb_Table[u+3]|Cr_Table[v+3]]; y = *py++; if (chroma_format==CHROMA444) { u = *pu++ >> 1; v = *pv++ >> 1; } *dst++ = Pixel[Y_Table[y+11]|Cb_Table[u+11]|Cr_Table[v+11]]; y = *py++; u = *pu++ >> 1; v = *pv++ >> 1; *dst++ = Pixel[Y_Table[y+1]|Cb_Table[u+1]|Cr_Table[v+1]]; y = *py++; if (chroma_format==CHROMA444) { u = *pu++ >> 1; v = *pv++ >> 1; } *dst++ = Pixel[Y_Table[y+9]|Cb_Table[u+9]|Cr_Table[v+9]]; } if (chroma_format==CHROMA420) { pu -= Chroma_Width; pv -= Chroma_Width; } /* line j + 3 */ for (i=0; i<Coded_Picture_Width; i+=4) { y = *py++; u = *pu++ >> 1; v = *pv++ >> 1; *dst++ = Pixel[Y_Table[y+15]|Cb_Table[u+15]|Cr_Table[v+15]]; y = *py++; if (chroma_format==CHROMA444) { u = *pu++ >> 1; v = *pv++ >> 1; } *dst++ = Pixel[Y_Table[y+7]|Cb_Table[u+7]|Cr_Table[v+7]]; y = *py++; u = *pu++ >> 1; v = *pv++ >> 1; *dst++ = Pixel[Y_Table[y+13]|Cb_Table[u+13]|Cr_Table[v+13]]; y = *py++; if (chroma_format==CHROMA444) { u = *pu++ >> 1; v = *pv++ >> 1; } *dst++ = Pixel[Y_Table[y+5]|Cb_Table[u+5]|Cr_Table[v+5]]; } }}static void Dither_Top_Field(src,dst)unsigned char *src[];unsigned char *dst;{ int i,j; int y,Y2,u,v; unsigned char *py,*Y2_ptr,*pu,*pv,*dst2; py = src[0]; Y2_ptr = src[0] + (Coded_Picture_Width<<1); pu = src[1]; pv = src[2]; dst2 = dst + Coded_Picture_Width; for (j=0; j<Coded_Picture_Height; j+=4) { /* line j + 0, j + 1 */ for (i=0; i<Coded_Picture_Width; i+=4) { y = *py++; Y2 = *Y2_ptr++; u = *pu++ >> 1; v = *pv++ >> 1; *dst++ = Pixel[Y_Table[y]|Cb_Table[u]|Cr_Table[v]]; *dst2++ = Pixel[Y_Table[((y+Y2)>>1)+12]|Cb_Table[u+12]|Cr_Table[v+12]]; y = *py++; Y2 = *Y2_ptr++; if (chroma_format==CHROMA444) { u = *pu++ >> 1; v = *pv++ >> 1; } *dst++ = Pixel[Y_Table[y+8]|Cb_Table[u+8]|Cr_Table[v+8]]; *dst2++ = Pixel[Y_Table[((y+Y2)>>1)+4]|Cb_Table[u+4]|Cr_Table[v+4]]; y = *py++; Y2 = *Y2_ptr++; u = *pu++ >> 1; v = *pv++ >> 1; *dst++ = Pixel[Y_Table[y+2]|Cb_Table[u+2]|Cr_Table[v+2]]; *dst2++ = Pixel[Y_Table[((y+Y2)>>1)+14]|Cb_Table[u+14]|Cr_Table[v+14]]; y = *py++; Y2 = *Y2_ptr++; if (chroma_format==CHROMA444) { u = *pu++ >> 1; v = *pv++ >> 1; } *dst++ = Pixel[Y_Table[y+10]|Cb_Table[u+10]|Cr_Table[v+10]]; *dst2++ = Pixel[Y_Table[((y+Y2)>>1)+6]|Cb_Table[u+6]|Cr_Table[v+6]]; } py += Coded_Picture_Width; if (j!=(Coded_Picture_Height-4)) Y2_ptr += Coded_Picture_Width; else Y2_ptr -= Coded_Picture_Width; dst += Coded_Picture_Width; dst2 += Coded_Picture_Width; if (chroma_format==CHROMA420) { pu -= Chroma_Width; pv -= Chroma_Width; } else { pu += Chroma_Width; pv += Chroma_Width; } /* line j + 2, j + 3 */ for (i=0; i<Coded_Picture_Width; i+=4) { y = *py++; Y2 = *Y2_ptr++; u = *pu++ >> 1; v = *pv++ >> 1; *dst++ = Pixel[Y_Table[y+3]|Cb_Table[u+3]|Cr_Table[v+3]]; *dst2++ = Pixel[Y_Table[((y+Y2)>>1)+15]|Cb_Table[u+15]|Cr_Table[v+15]]; y = *py++; Y2 = *Y2_ptr++; if (chroma_format==CHROMA444) { u = *pu++ >> 1; v = *pv++ >> 1; } *dst++ = Pixel[Y_Table[y+11]|Cb_Table[u+11]|Cr_Table[v+11]]; *dst2++ = Pixel[Y_Table[((y+Y2)>>1)+7]|Cb_Table[u+7]|Cr_Table[v+7]]; y = *py++; Y2 = *Y2_ptr++; u = *pu++ >> 1; v = *pv++ >> 1; *dst++ = Pixel[Y_Table[y+1]|Cb_Table[u+1]|Cr_Table[v+1]]; *dst2++ = Pixel[Y_Table[((y+Y2)>>1)+13]|Cb_Table[u+13]|Cr_Table[v+13]]; y = *py++; Y2 = *Y2_ptr++; if (chroma_format==CHROMA444) { u = *pu++ >> 1; v = *pv++ >> 1; } *dst++ = Pixel[Y_Table[y+9]|Cb_Table[u+9]|Cr_Table[v+9]]; *dst2++ = Pixel[Y_Table[((y+Y2)>>1)+5]|Cb_Table[u+5]|Cr_Table[v+5]]; } py += Coded_Picture_Width; Y2_ptr += Coded_Picture_Width; dst += Coded_Picture_Width; dst2 += Coded_Picture_Width; pu += Chroma_Width; pv += Chroma_Width; }}static void Dither_Bottom_Field(src,dst)unsigned char *src[];unsigned char *dst;{ int i,j; int y,Y2,u,v; unsigned char *py,*Y2_ptr,*pu,*pv,*dst2; py = src[0] + Coded_Picture_Width; Y2_ptr = py; pu = src[1] + Chroma_Width; pv = src[2] + Chroma_Width; dst2 = dst + Coded_Picture_Width; for (j=0; j<Coded_Picture_Height; j+=4) { /* line j + 0, j + 1 */ for (i=0; i<Coded_Picture_Width; i+=4) {?? 快捷鍵說明
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