store.c
资源名称:mpeg2.rar [点击查看]
上传用户:ma_junhua
上传日期:2008-04-11
资源大小:2752k
文件大小:15k
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其他嵌入式/单片机内容
开发平台:
C/C++
- /* store.c, picture output routines */
- /* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
- /*
- * Disclaimer of Warranty
- *
- * These software programs are available to the user without any license fee or
- * royalty on an "as is" basis. The MPEG Software Simulation Group disclaims
- * any and all warranties, whether express, implied, or statuary, including any
- * implied warranties or merchantability or of fitness for a particular
- * purpose. In no event shall the copyright-holder be liable for any
- * incidental, punitive, or consequential damages of any kind whatsoever
- * arising from the use of these programs.
- *
- * This disclaimer of warranty extends to the user of these programs and user's
- * customers, employees, agents, transferees, successors, and assigns.
- *
- * The MPEG Software Simulation Group does not represent or warrant that the
- * programs furnished hereunder are free of infringement of any third-party
- * patents.
- *
- * Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
- * are subject to royalty fees to patent holders. Many of these patents are
- * general enough such that they are unavoidable regardless of implementation
- * design.
- *
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <fcntl.h>
- #include "config.h"
- #include "global.h"
- /* private prototypes */
- static void store_one _ANSI_ARGS_((char *outname, unsigned char *src[],
- int offset, int incr, int height));
- static void store_yuv _ANSI_ARGS_((char *outname, unsigned char *src[],
- int offset, int incr, int height));
- static void store_sif _ANSI_ARGS_((char *outname, unsigned char *src[],
- int offset, int incr, int height));
- static void store_ppm_tga _ANSI_ARGS_((char *outname, unsigned char *src[],
- int offset, int incr, int height, int tgaflag));
- static void store_yuv1 _ANSI_ARGS_((char *name, unsigned char *src,
- int offset, int incr, int width, int height));
- static void putbyte _ANSI_ARGS_((int c));
- static void putword _ANSI_ARGS_((int w));
- static void conv422to444 _ANSI_ARGS_((unsigned char *src, unsigned char *dst));
- static void conv420to422 _ANSI_ARGS_((unsigned char *src, unsigned char *dst));
- #define OBFRSIZE 4096
- static unsigned char obfr[OBFRSIZE];
- static unsigned char *optr;
- static int outfile;
- /*
- * store a picture as either one frame or two fields
- */
- void Write_Frame(src,frame)
- unsigned char *src[];
- int frame;
- {
- char outname[FILENAME_LENGTH];
- if (progressive_sequence || progressive_frame || Frame_Store_Flag)
- {
- /* progressive */
- sprintf(outname,Output_Picture_Filename,frame,'f');
- store_one(outname,src,0,Coded_Picture_Width,vertical_size);
- }
- else
- {
- /* interlaced */
- sprintf(outname,Output_Picture_Filename,frame,'a');
- store_one(outname,src,0,Coded_Picture_Width<<1,vertical_size>>1);
- sprintf(outname,Output_Picture_Filename,frame,'b');
- store_one(outname,src,
- Coded_Picture_Width,Coded_Picture_Width<<1,vertical_size>>1);
- }
- }
- /*
- * store one frame or one field
- */
- static void store_one(outname,src,offset,incr,height)
- char *outname;
- unsigned char *src[];
- int offset, incr, height;
- {
- switch (Output_Type)
- {
- case T_YUV:
- store_yuv(outname,src,offset,incr,height);
- break;
- case T_SIF:
- store_sif(outname,src,offset,incr,height);
- break;
- case T_TGA:
- store_ppm_tga(outname,src,offset,incr,height,1);
- break;
- case T_PPM:
- store_ppm_tga(outname,src,offset,incr,height,0);
- break;
- #ifdef DISPLAY
- case T_X11:
- dither(src);
- break;
- #endif
- default:
- break;
- }
- }
- /* separate headerless files for y, u and v */
- static void store_yuv(outname,src,offset,incr,height)
- char *outname;
- unsigned char *src[];
- int offset,incr,height;
- {
- int hsize;
- char tmpname[FILENAME_LENGTH];
- hsize = horizontal_size;
- sprintf(tmpname,"%s.Y",outname);
- store_yuv1(tmpname,src[0],offset,incr,hsize,height);
- if (chroma_format!=CHROMA444)
- {
- offset>>=1; incr>>=1; hsize>>=1;
- }
- if (chroma_format==CHROMA420)
- {
- height>>=1;
- }
- sprintf(tmpname,"%s.U",outname);
- store_yuv1(tmpname,src[1],offset,incr,hsize,height);
- sprintf(tmpname,"%s.V",outname);
- store_yuv1(tmpname,src[2],offset,incr,hsize,height);
- }
- /* auxiliary routine */
- static void store_yuv1(name,src,offset,incr,width,height)
- char *name;
- unsigned char *src;
- int offset,incr,width,height;
- {
- int i, j;
- unsigned char *p;
- if (!Quiet_Flag)
- fprintf(stderr,"saving %sn",name);
- if ((outfile = open(name,O_CREAT|O_TRUNC|O_WRONLY|O_BINARY,0666))==-1)
- {
- sprintf(Error_Text,"Couldn't create %sn",name);
- Error(Error_Text);
- }
- optr=obfr;
- for (i=0; i<height; i++)
- {
- p = src + offset + incr*i;
- for (j=0; j<width; j++)
- putbyte(*p++);
- }
- if (optr!=obfr)
- write(outfile,obfr,optr-obfr);
- close(outfile);
- }
- /*
- * store as headerless file in U,Y,V,Y format
- */
- static void store_sif (outname,src,offset,incr,height)
- char *outname;
- unsigned char *src[];
- int offset, incr, height;
- {
- int i,j;
- unsigned char *py, *pu, *pv;
- static unsigned char *u422, *v422;
- if (chroma_format==CHROMA444)
- Error("4:4:4 not supported for SIF format");
- if (chroma_format==CHROMA422)
- {
- u422 = src[1];
- v422 = src[2];
- }
- else
- {
- if (!u422)
- {
- if (!(u422 = (unsigned char *)malloc((Coded_Picture_Width>>1)
- *Coded_Picture_Height)))
- Error("malloc failed");
- if (!(v422 = (unsigned char *)malloc((Coded_Picture_Width>>1)
- *Coded_Picture_Height)))
- Error("malloc failed");
- }
- conv420to422(src[1],u422);
- conv420to422(src[2],v422);
- }
- strcat(outname,".SIF");
- if (!Quiet_Flag)
- fprintf(stderr,"saving %sn",outname);
- if ((outfile = open(outname,O_CREAT|O_TRUNC|O_WRONLY|O_BINARY,0666))==-1)
- {
- sprintf(Error_Text,"Couldn't create %sn",outname);
- Error(Error_Text);
- }
- optr = obfr;
- for (i=0; i<height; i++)
- {
- py = src[0] + offset + incr*i;
- pu = u422 + (offset>>1) + (incr>>1)*i;
- pv = v422 + (offset>>1) + (incr>>1)*i;
- for (j=0; j<horizontal_size; j+=2)
- {
- putbyte(*pu++);
- putbyte(*py++);
- putbyte(*pv++);
- putbyte(*py++);
- }
- }
- if (optr!=obfr)
- write(outfile,obfr,optr-obfr);
- close(outfile);
- }
- /*
- * store as PPM (PBMPLUS) or uncompressed Truevision TGA ('Targa') file
- */
- static void store_ppm_tga(outname,src,offset,incr,height,tgaflag)
- char *outname;
- unsigned char *src[];
- int offset, incr, height;
- int tgaflag;
- {
- int i, j;
- int y, u, v, r, g, b;
- int crv, cbu, cgu, cgv;
- unsigned char *py, *pu, *pv;
- static unsigned char tga24[14] = {0,0,2,0,0,0,0, 0,0,0,0,0,24,32};
- char header[FILENAME_LENGTH];
- static unsigned char *u422, *v422, *u444, *v444;
- if (chroma_format==CHROMA444)
- {
- u444 = src[1];
- v444 = src[2];
- }
- else
- {
- if (!u444)
- {
- if (chroma_format==CHROMA420)
- {
- if (!(u422 = (unsigned char *)malloc((Coded_Picture_Width>>1)
- *Coded_Picture_Height)))
- Error("malloc failed");
- if (!(v422 = (unsigned char *)malloc((Coded_Picture_Width>>1)
- *Coded_Picture_Height)))
- Error("malloc failed");
- }
- if (!(u444 = (unsigned char *)malloc(Coded_Picture_Width
- *Coded_Picture_Height)))
- Error("malloc failed");
- if (!(v444 = (unsigned char *)malloc(Coded_Picture_Width
- *Coded_Picture_Height)))
- Error("malloc failed");
- }
- if (chroma_format==CHROMA420)
- {
- conv420to422(src[1],u422);
- conv420to422(src[2],v422);
- conv422to444(u422,u444);
- conv422to444(v422,v444);
- }
- else
- {
- conv422to444(src[1],u444);
- conv422to444(src[2],v444);
- }
- }
- strcat(outname,tgaflag ? ".tga" : ".ppm");
- if (!Quiet_Flag)
- fprintf(stderr,"saving %sn",outname);
- if ((outfile = open(outname,O_CREAT|O_TRUNC|O_WRONLY|O_BINARY,0666))==-1)
- {
- sprintf(Error_Text,"Couldn't create %sn",outname);
- Error(Error_Text);
- }
- optr = obfr;
- if (tgaflag)
- {
- /* TGA header */
- for (i=0; i<12; i++)
- putbyte(tga24[i]);
- putword(horizontal_size); putword(height);
- putbyte(tga24[12]); putbyte(tga24[13]);
- }
- else
- {
- /* PPM header */
- sprintf(header,"P6n%d %dn255n",horizontal_size,height);
- for (i=0; header[i]!=0; i++)
- putbyte(header[i]);
- }
- /* matrix coefficients */
- crv = Inverse_Table_6_9[matrix_coefficients][0];
- cbu = Inverse_Table_6_9[matrix_coefficients][1];
- cgu = Inverse_Table_6_9[matrix_coefficients][2];
- cgv = Inverse_Table_6_9[matrix_coefficients][3];
- for (i=0; i<height; i++)
- {
- py = src[0] + offset + incr*i;
- pu = u444 + offset + incr*i;
- pv = v444 + offset + incr*i;
- for (j=0; j<horizontal_size; j++)
- {
- u = *pu++ - 128;
- v = *pv++ - 128;
- y = 76309 * (*py++ - 16); /* (255/219)*65536 */
- r = Clip[(y + crv*v + 32768)>>16];
- g = Clip[(y - cgu*u - cgv*v + 32768)>>16];
- b = Clip[(y + cbu*u + 32786)>>16];
- if (tgaflag)
- {
- putbyte(b); putbyte(g); putbyte(r);
- }
- else
- {
- putbyte(r); putbyte(g); putbyte(b);
- }
- }
- }
- if (optr!=obfr)
- write(outfile,obfr,optr-obfr);
- close(outfile);
- }
- static void putbyte(c)
- int c;
- {
- *optr++ = c;
- if (optr == obfr+OBFRSIZE)
- {
- write(outfile,obfr,OBFRSIZE);
- optr = obfr;
- }
- }
- static void putword(w)
- int w;
- {
- putbyte(w); putbyte(w>>8);
- }
- /* horizontal 1:2 interpolation filter */
- static void conv422to444(src,dst)
- unsigned char *src,*dst;
- {
- int i, i2, w, j, im3, im2, im1, ip1, ip2, ip3;
- w = Coded_Picture_Width>>1;
- if (base.MPEG2_Flag)
- {
- for (j=0; j<Coded_Picture_Height; j++)
- {
- for (i=0; i<w; i++)
- {
- i2 = i<<1;
- im2 = (i<2) ? 0 : i-2;
- im1 = (i<1) ? 0 : i-1;
- ip1 = (i<w-1) ? i+1 : w-1;
- ip2 = (i<w-2) ? i+2 : w-1;
- ip3 = (i<w-3) ? i+3 : w-1;
- /* FIR filter coefficients (*256): 21 0 -52 0 159 256 159 0 -52 0 21 */
- /* even samples (0 0 256 0 0) */
- dst[i2] = src[i];
- /* odd samples (21 -52 159 159 -52 21) */
- dst[i2+1] = Clip[(int)(21*(src[im2]+src[ip3])
- -52*(src[im1]+src[ip2])
- +159*(src[i]+src[ip1])+128)>>8];
- }
- src+= w;
- dst+= Coded_Picture_Width;
- }
- }
- else
- {
- for (j=0; j<Coded_Picture_Height; j++)
- {
- for (i=0; i<w; i++)
- {
- i2 = i<<1;
- im3 = (i<3) ? 0 : i-3;
- im2 = (i<2) ? 0 : i-2;
- im1 = (i<1) ? 0 : i-1;
- ip1 = (i<w-1) ? i+1 : w-1;
- ip2 = (i<w-2) ? i+2 : w-1;
- ip3 = (i<w-3) ? i+3 : w-1;
- /* FIR filter coefficients (*256): 5 -21 70 228 -37 11 */
- dst[i2] = Clip[(int)( 5*src[im3]
- -21*src[im2]
- +70*src[im1]
- +228*src[i]
- -37*src[ip1]
- +11*src[ip2]+128)>>8];
- dst[i2+1] = Clip[(int)( 5*src[ip3]
- -21*src[ip2]
- +70*src[ip1]
- +228*src[i]
- -37*src[im1]
- +11*src[im2]+128)>>8];
- }
- src+= w;
- dst+= Coded_Picture_Width;
- }
- }
- }
- /* vertical 1:2 interpolation filter */
- static void conv420to422(src,dst)
- unsigned char *src,*dst;
- {
- int w, h, i, j, j2;
- int jm6, jm5, jm4, jm3, jm2, jm1, jp1, jp2, jp3, jp4, jp5, jp6, jp7;
- w = Coded_Picture_Width>>1;
- h = Coded_Picture_Height>>1;
- if (progressive_frame)
- {
- /* intra frame */
- for (i=0; i<w; i++)
- {
- for (j=0; j<h; j++)
- {
- j2 = j<<1;
- jm3 = (j<3) ? 0 : j-3;
- jm2 = (j<2) ? 0 : j-2;
- jm1 = (j<1) ? 0 : j-1;
- jp1 = (j<h-1) ? j+1 : h-1;
- jp2 = (j<h-2) ? j+2 : h-1;
- jp3 = (j<h-3) ? j+3 : h-1;
- /* FIR filter coefficients (*256): 5 -21 70 228 -37 11 */
- /* New FIR filter coefficients (*256): 3 -16 67 227 -32 7 */
- dst[w*j2] = Clip[(int)( 3*src[w*jm3]
- -16*src[w*jm2]
- +67*src[w*jm1]
- +227*src[w*j]
- -32*src[w*jp1]
- +7*src[w*jp2]+128)>>8];
- dst[w*(j2+1)] = Clip[(int)( 3*src[w*jp3]
- -16*src[w*jp2]
- +67*src[w*jp1]
- +227*src[w*j]
- -32*src[w*jm1]
- +7*src[w*jm2]+128)>>8];
- }
- src++;
- dst++;
- }
- }
- else
- {
- /* intra field */
- for (i=0; i<w; i++)
- {
- for (j=0; j<h; j+=2)
- {
- j2 = j<<1;
- /* top field */
- jm6 = (j<6) ? 0 : j-6;
- jm4 = (j<4) ? 0 : j-4;
- jm2 = (j<2) ? 0 : j-2;
- jp2 = (j<h-2) ? j+2 : h-2;
- jp4 = (j<h-4) ? j+4 : h-2;
- jp6 = (j<h-6) ? j+6 : h-2;
- /* Polyphase FIR filter coefficients (*256): 2 -10 35 242 -18 5 */
- /* New polyphase FIR filter coefficients (*256): 1 -7 30 248 -21 5 */
- dst[w*j2] = Clip[(int)( 1*src[w*jm6]
- -7*src[w*jm4]
- +30*src[w*jm2]
- +248*src[w*j]
- -21*src[w*jp2]
- +5*src[w*jp4]+128)>>8];
- /* Polyphase FIR filter coefficients (*256): 11 -38 192 113 -30 8 */
- /* New polyphase FIR filter coefficients (*256):7 -35 194 110 -24 4 */
- dst[w*(j2+2)] = Clip[(int)( 7*src[w*jm4]
- -35*src[w*jm2]
- +194*src[w*j]
- +110*src[w*jp2]
- -24*src[w*jp4]
- +4*src[w*jp6]+128)>>8];
- /* bottom field */
- jm5 = (j<5) ? 1 : j-5;
- jm3 = (j<3) ? 1 : j-3;
- jm1 = (j<1) ? 1 : j-1;
- jp1 = (j<h-1) ? j+1 : h-1;
- jp3 = (j<h-3) ? j+3 : h-1;
- jp5 = (j<h-5) ? j+5 : h-1;
- jp7 = (j<h-7) ? j+7 : h-1;
- /* Polyphase FIR filter coefficients (*256): 11 -38 192 113 -30 8 */
- /* New polyphase FIR filter coefficients (*256):7 -35 194 110 -24 4 */
- dst[w*(j2+1)] = Clip[(int)( 7*src[w*jp5]
- -35*src[w*jp3]
- +194*src[w*jp1]
- +110*src[w*jm1]
- -24*src[w*jm3]
- +4*src[w*jm5]+128)>>8];
- dst[w*(j2+3)] = Clip[(int)( 1*src[w*jp7]
- -7*src[w*jp5]
- +30*src[w*jp3]
- +248*src[w*jp1]
- -21*src[w*jm1]
- +5*src[w*jm3]+128)>>8];
- }
- src++;
- dst++;
- }
- }
- }