diff options
Diffstat (limited to 'converter/ppm/411toppm.c')
| -rw-r--r-- | converter/ppm/411toppm.c | 219 |
1 files changed, 94 insertions, 125 deletions
diff --git a/converter/ppm/411toppm.c b/converter/ppm/411toppm.c index 6ece4c4b..eb2372a5 100644 --- a/converter/ppm/411toppm.c +++ b/converter/ppm/411toppm.c @@ -30,7 +30,7 @@ Bryan Henderson reworked the program to use the Netpbm libraries to create the PPM output and follow some other Netpbm conventions. - 2001-03-03. Bryan's contribution is public domain. + 2001-03-03. Bryan's contribution is public domain. */ /* * Copyright (c) 1995 The Regents of the University of California. @@ -56,22 +56,21 @@ * HEADER FILES * *==============*/ #include <stdio.h> -#include <stdlib.h> #include "pm_c_util.h" -#include "ppm.h" -#include "shhopt.h" #include "mallocvar.h" +#include "shhopt.h" +#include "ppm.h" typedef unsigned char uint8; #define CHOP(x) ((x < 0) ? 0 : ((x > 255) ? 255 : x)) -struct cmdline_info { +struct CmdlineInfo { /* All the information the user supplied in the command line, in a form easy for the program to use. */ - const char *input_filespec; /* Filespec of input file */ + const char * inputFileName; int width; int height; }; @@ -79,38 +78,42 @@ struct cmdline_info { static void -parse_command_line(int argc, char ** argv, - struct cmdline_info *cmdline_p) { +parseCommandLine(int argc, const char ** argv, + struct CmdlineInfo *cmdlineP) { /*---------------------------------------------------------------------------- Note that the file spec array we return is stored in the storage that was passed to us as the argv array. -----------------------------------------------------------------------------*/ - optStruct *option_def = malloc(100*sizeof(optStruct)); + optEntry * option_def; /* Instructions to OptParseOptions2 on how to parse our options. */ - optStruct2 opt; + optStruct3 opt; unsigned int option_def_index; - option_def_index = 0; /* incremented by OPTENTRY */ - OPTENTRY(0, "width", OPT_INT, &cmdline_p->width, 0); - OPTENTRY(0, "height", OPT_INT, &cmdline_p->height, 0); + MALLOCARRAY_NOFAIL(option_def, 100); + + option_def_index = 0; /* incremented by OPTENT3 */ + OPTENT3(0, "width", OPT_INT, &cmdlineP->width, NULL, 0); + OPTENT3(0, "height", OPT_INT, &cmdlineP->height, NULL, 0); /* Set the defaults */ - cmdline_p->width = 64; - cmdline_p->height = 48; + cmdlineP->width = 64; + cmdlineP->height = 48; opt.opt_table = option_def; opt.short_allowed = FALSE; /* We have no short (old-fashioned) options */ opt.allowNegNum = FALSE; /* We have no parms that are negative numbers */ - optParseOptions2(&argc, argv, opt, 0); - /* Uses and sets argc, argv, and some of *cmdline_p and others. */ + pm_optParseOptions3(&argc, (char **)argv, opt, sizeof(opt), 0); + /* Uses and sets argc, argv, and some of *cmdlineP and others. */ - if (cmdline_p->width <= 0) + if (cmdlineP->width <= 0) pm_error("-width must be positive."); - if (cmdline_p->height <= 0) + if (cmdlineP->width %4 != 0) + pm_error("-width must be a multiple of 4."); + if (cmdlineP->height <= 0) pm_error("-height must be positive."); if (argc > 2) @@ -118,145 +121,111 @@ parse_command_line(int argc, char ** argv, "You supplied %d", argc-1); else { if (argc > 1) - cmdline_p->input_filespec = argv[1]; + cmdlineP->inputFileName = argv[1]; else - cmdline_p->input_filespec = "-"; + cmdlineP->inputFileName = "-"; } + free(option_def); } -static void -ReadYUV(FILE *fpointer, const int width, const int height, - uint8 ** const orig_y, uint8 ** const orig_cb, - uint8 ** const orig_cr) { +static void +ReadYUV(FILE * const ifP, + uint8 * const inbuff) { + + size_t bytesRead; - int y, x, i; + bytesRead = fread(inbuff, 1, 6, ifP); - for (y = 0; y < height; y++) { - for (x = 0, i = 0; x < width; x+=4, i++) { - fread(orig_y[y]+x , 1, 4, fpointer); - fread(orig_cb[y]+i, 1, 1, fpointer); - fread(orig_cr[y]+i, 1, 1, fpointer); - } - } + if (bytesRead != 6 ) { + if (feof(ifP)) + pm_error("Premature end of input."); + else + pm_error("Error reading input."); + } } static void -AllocYCC(const int width, const int height, - uint8 *** const orig_yP, uint8 *** const orig_crP, - uint8 *** const orig_cbP) { - int y; - - MALLOCARRAY_NOFAIL(*orig_yP, height); - for (y = 0; y < height; y++) - MALLOCARRAY_NOFAIL((*orig_yP)[y], width); - - MALLOCARRAY_NOFAIL(*orig_crP, height); - for (y = 0; y < height; y++) - MALLOCARRAY_NOFAIL((*orig_crP)[y], width/4); - - MALLOCARRAY_NOFAIL(*orig_cbP, height); - for (y = 0; y < height; y++) - MALLOCARRAY_NOFAIL((*orig_cbP)[y], width/4); -} +YUVtoPPM(FILE * const ifP, + int const width, + int const height, + pixel * const pixrow ) { + unsigned int col; + for (col = 0; col < width; ++col) { -static void -YUVtoPPM(const int width, const int height, - uint8 ** const orig_y, - uint8 ** const orig_cb, - uint8 ** const orig_cr, - pixel ** const ppm_image - ) { - int **Y, **U, **V; - int y; + uint8 inbuff[6]; - /* first, allocate tons of memory */ + uint8 * const origY = &inbuff[0]; + uint8 * const origCb = &inbuff[4]; + uint8 * const origCr = &inbuff[5]; + int y, u, v; + int32_t tempR, tempG, tempB; + pixval r, g, b; - MALLOCARRAY_NOFAIL(Y, height); - for (y = 0; y < height; y++) - MALLOCARRAY_NOFAIL(Y[y], width); - - MALLOCARRAY_NOFAIL(U, height); - for (y = 0; y < height; y++) - MALLOCARRAY_NOFAIL(U[y], width / 4); - - MALLOCARRAY_NOFAIL(V, height); - for (y = 0; y < height; y++) - MALLOCARRAY_NOFAIL(V[y], width/4); - - for ( y = 0; y < height; y ++ ) { - int x; - for ( x = 0; x < width/4; x ++ ) { - U[y][x] = orig_cb[y][x] - 128; - V[y][x] = orig_cr[y][x] - 128; - } - } - for ( y = 0; y < height; y ++ ) { - int x; - for ( x = 0; x < width; x ++ ) - { - Y[y][x] = orig_y[y][x] - 16; - } - } - for ( y = 0; y < height; y++ ) { - int x; - for ( x = 0; x < width; x++ ) { - pixval r, g, b; - long tempR, tempG, tempB; - /* look at yuvtoppm source for explanation */ - - tempR = 104635*V[y][x/4]; - tempG = -25690*U[y][x/4] + -53294 * V[y][x/4]; - tempB = 132278*U[y][x/4]; - - tempR += (Y[y][x]*76310); - tempG += (Y[y][x]*76310); - tempB += (Y[y][x]*76310); - - r = CHOP((int)(tempR >> 16)); - g = CHOP((int)(tempG >> 16)); - b = CHOP((int)(tempB >> 16)); - - PPM_ASSIGN(ppm_image[y][x], r, g, b); + if (col % 4 == 0) { + ReadYUV(ifP, inbuff); + u = origCb[0] - 128; + v = origCr[0] - 128; } + + y = origY[col % 4] - 16; + + tempR = 104635 * v + y * 76310; + tempG = -25690 * u + -53294 * v + y * 76310; + tempB = 132278 * u + y * 76310; + + r = CHOP((int)(tempR >> 16)); + g = CHOP((int)(tempG >> 16)); + b = CHOP((int)(tempB >> 16)); + + PPM_ASSIGN(pixrow[col], r, g, b); } - /* We really should free the Y, U, and V arrays now */ } int -main(int argc, char **argv) { - FILE *infile; - struct cmdline_info cmdline; - uint8 **orig_y, **orig_cb, **orig_cr; - pixel **ppm_image; +main(int argc, const char **argv) { - ppm_init(&argc, argv); + pixval const maxval = 255; + struct CmdlineInfo cmdline; + FILE * ifP; + pixel * pixrow; + unsigned int row; - parse_command_line(argc, argv, &cmdline); + pm_proginit(&argc, argv); - AllocYCC(cmdline.width, cmdline.height, &orig_y, &orig_cr, &orig_cb); - ppm_image = ppm_allocarray(cmdline.width, cmdline.height); + parseCommandLine(argc, argv, &cmdline); - pm_message("Reading (%dx%d): %s\n", cmdline.width, cmdline.height, - cmdline.input_filespec); - infile = pm_openr(cmdline.input_filespec); - ReadYUV(infile, cmdline.width, cmdline.height, orig_y, orig_cb, orig_cr); - pm_close(infile); + pixrow = ppm_allocrow(cmdline.width); - YUVtoPPM(cmdline.width, cmdline.height, orig_y, orig_cb, orig_cr, - ppm_image); + pm_message("Reading (%ux%u): '%s'", cmdline.width, cmdline.height, + cmdline.inputFileName); - ppm_writeppm(stdout, ppm_image, cmdline.width, cmdline.height, 255, 0); + ifP = pm_openr(cmdline.inputFileName); - ppm_freearray(ppm_image, cmdline.height); + ppm_writeppminit(stdout, cmdline.width, cmdline.height, maxval, 0); + + for (row = 0; row < cmdline.height; ++row) { + YUVtoPPM(ifP, cmdline.width, cmdline.height, pixrow); + ppm_writeppmrow(stdout, pixrow, cmdline.width, maxval, 0); + } + + if (fgetc(ifP) != EOF) + pm_message("Extraneous data at end of image."); + + pm_close(ifP); + ppm_freerow(pixrow); return 0; } +/* + By default a .411 file is width=64, height=48, 4608 bytes. + There is no header. +*/ |