318 lines
8.7 KiB
C
318 lines
8.7 KiB
C
#include <stdio.h>
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#include <malloc.h>
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#include "mj2.h"
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#include <j2k.h>
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#include <int.h>
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/* ----------------------- */
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/* */
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/* */
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/* Count the number of frames */
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/* in a YUV file */
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/* */
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/* ----------------------- */
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int yuv_num_frames(mj2_tk_t * tk, FILE *f)
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{
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int numimages, frame_size;
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long end_of_f;
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frame_size = (int) (tk->w * tk->h * (1.0 + (double) 2 / (double) (tk->CbCr_subsampling_dx * tk->CbCr_subsampling_dy))); /* Calculate frame size */
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fseek(f, 0, SEEK_END);
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end_of_f = ftell(f); /* Calculate file size */
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if (end_of_f < frame_size) {
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fprintf(stderr,
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"YUV does not contains any frame of %d x %d size\n", tk->w,
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tk->h);
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return 0;
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}
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numimages = end_of_f / frame_size; /* Calculate number of images */
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return numimages;
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fclose(f);
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}
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// -----------------------
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//
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//
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// YUV to IMAGE
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//
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// -----------------------
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int yuvtoimage(FILE *yuvfile, mj2_tk_t * tk, j2k_image_t * img,
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int frame_num, int subsampling_dx, int subsampling_dy)
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{
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int i, j;
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int offset;
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long end_of_f, position;
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FILE *Compo;
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offset =
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(int) ((double) (frame_num * tk->w * tk->h) *
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(1.0 +
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1.0 * (double) 2 / (double) (tk->CbCr_subsampling_dx *
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tk->CbCr_subsampling_dy)));
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fseek(yuvfile, 0, SEEK_END);
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end_of_f = ftell(yuvfile);
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fseek(yuvfile, sizeof(unsigned char) * offset, SEEK_SET);
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position = ftell(yuvfile);
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if (position >= end_of_f) {
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fprintf(stderr, "Cannot reach frame number %d in yuv file !!\n",
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frame_num);
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return 0;
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}
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img->x0 = tk->Dim[0];
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img->y0 = tk->Dim[1];
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img->x1 = !tk->Dim[0] ? (tk->w - 1) * subsampling_dx + 1 : tk->Dim[0] +
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(tk->w - 1) * subsampling_dx + 1;
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img->y1 = !tk->Dim[1] ? (tk->h - 1) * subsampling_dy + 1 : tk->Dim[1] +
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(tk->h - 1) * subsampling_dy + 1;
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img->numcomps = 3;
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img->color_space = 3;
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img->comps = (j2k_comp_t *) malloc(img->numcomps * sizeof(j2k_comp_t));
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for (i = 0; i < img->numcomps; i++) {
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img->comps[i].data = (int *) malloc(sizeof(int) * tk->w * tk->h);
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img->comps[i].prec = 8;
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img->comps[i].bpp = 8;
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img->comps[i].sgnd = 0;
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if (i == 0) {
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img->comps[i].dx = subsampling_dx;
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img->comps[i].dy = subsampling_dy;
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} else {
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img->comps[i].dx = subsampling_dx * tk->CbCr_subsampling_dx;
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img->comps[i].dy = subsampling_dy * tk->CbCr_subsampling_dy;
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}
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}
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Compo = fopen("Compo0", "wb");
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if (!Compo) {
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fprintf(stderr, "Failed to open Compo0 for writing !\n");
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}
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for (i = 0; i < (tk->w * tk->h / (img->comps[0].dx * img->comps[0].dy))
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&& !feof(yuvfile); i++) {
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unsigned char y;
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j = fread(&y, 1, 1, yuvfile);
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fwrite(&y, 1, 1, Compo);
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}
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fclose(Compo);
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Compo = fopen("Compo1", "wb");
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if (!Compo) {
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fprintf(stderr, "Failed to open Compo1 for writing !\n");
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}
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for (i = 0; i < (tk->w * tk->h / (img->comps[1].dx * img->comps[1].dy))
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&& !feof(yuvfile); i++) {
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unsigned char cb;
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j = fread(&cb, sizeof(unsigned char), 1, yuvfile);
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fwrite(&cb, 1, 1, Compo);
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}
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fclose(Compo);
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Compo = fopen("Compo2", "wb");
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if (!Compo) {
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fprintf(stderr, "Failed to open Compo2 for writing !\n");
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}
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for (i = 0; i < (tk->w * tk->h / (img->comps[2].dx * img->comps[2].dy))
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&& !feof(yuvfile); i++) {
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unsigned char cr;
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j = fread(&cr, sizeof(unsigned char), 1, yuvfile);
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fwrite(&cr, 1, 1, Compo);
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}
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fclose(Compo);
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return 1;
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}
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// -----------------------
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//
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//
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// IMAGE to YUV
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//
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// -----------------------
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int imagetoyuv(j2k_image_t * img, j2k_cp_t * cp, char *outfile)
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{
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FILE *f;
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int i;
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if (img->numcomps == 3) {
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if (img->comps[0].dx != img->comps[1].dx / 2
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|| img->comps[1].dx != img->comps[2].dx) {
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fprintf(stderr,
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"Error with the input image components size: cannot create yuv file)\n");
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return 1;
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}
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} else if (!(img->numcomps == 1)) {
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fprintf(stderr,
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"Error with the number of image components(must be one or three)\n");
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return 1;
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}
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f = fopen(outfile, "a+b");
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if (!f) {
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fprintf(stderr, "failed to open %s for writing\n", outfile);
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return 1;
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}
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for (i = 0; i < (img->comps[0].w * img->comps[0].h); i++) {
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unsigned char y;
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y = img->comps[0].data[i];
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fwrite(&y, 1, 1, f);
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}
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if (img->numcomps == 3) {
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for (i = 0; i < (img->comps[1].w * img->comps[1].h); i++) {
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unsigned char cb;
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cb = img->comps[1].data[i];
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fwrite(&cb, 1, 1, f);
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}
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for (i = 0; i < (img->comps[2].w * img->comps[2].h); i++) {
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unsigned char cr;
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cr = img->comps[2].data[i];
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fwrite(&cr, 1, 1, f);
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}
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} else if (img->numcomps == 1) {
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for (i = 0; i < (img->comps[0].w * img->comps[0].h * 0.25); i++) {
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unsigned char cb = 125;
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fwrite(&cb, 1, 1, f);
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}
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for (i = 0; i < (img->comps[0].w * img->comps[0].h * 0.25); i++) {
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unsigned char cr = 125;
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fwrite(&cr, 1, 1, f);
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}
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}
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fclose(f);
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return 0;
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}
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// -----------------------
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//
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//
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// IMAGE to BMP
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//
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// -----------------------
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int imagetobmp(j2k_image_t * img, j2k_cp_t * cp, char *outfile) {
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int w,wr,h,hr,i,pad;
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FILE *f;
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if (img->numcomps == 3 && img->comps[0].dx == img->comps[1].dx
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&& img->comps[1].dx == img->comps[2].dx
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&& img->comps[0].dy == img->comps[1].dy
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&& img->comps[1].dy == img->comps[2].dy
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&& img->comps[0].prec == img->comps[1].prec
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&& img->comps[1].prec == img->comps[2].prec) {
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/* -->> -->> -->> -->>
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24 bits color
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<<-- <<-- <<-- <<-- */
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f = fopen(outfile, "wb");
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if (!f) {
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fprintf(stderr, "failed to open %s for writing\n", outfile);
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return 1;
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}
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w = img->comps[0].w;
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wr = int_ceildivpow2(img->comps[0].w, img->comps[0].factor);
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h = img->comps[0].h;
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hr = int_ceildivpow2(img->comps[0].h, img->comps[0].factor);
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fprintf(f, "BM");
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/* FILE HEADER */
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/* ------------- */
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fprintf(f, "%c%c%c%c",
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(unsigned char) (hr * wr * 3 + 3 * hr * (wr % 2) +
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54) & 0xff,
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(unsigned char) ((hr * wr * 3 + 3 * hr * (wr % 2) + 54)
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>> 8) & 0xff,
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(unsigned char) ((hr * wr * 3 + 3 * hr * (wr % 2) + 54)
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>> 16) & 0xff,
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(unsigned char) ((hr * wr * 3 + 3 * hr * (wr % 2) + 54)
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>> 24) & 0xff);
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fprintf(f, "%c%c%c%c", (0) & 0xff, ((0) >> 8) & 0xff,
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((0) >> 16) & 0xff, ((0) >> 24) & 0xff);
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fprintf(f, "%c%c%c%c", (54) & 0xff, ((54) >> 8) & 0xff,
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((54) >> 16) & 0xff, ((54) >> 24) & 0xff);
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/* INFO HEADER */
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/* ------------- */
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fprintf(f, "%c%c%c%c", (40) & 0xff, ((40) >> 8) & 0xff,
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((40) >> 16) & 0xff, ((40) >> 24) & 0xff);
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fprintf(f, "%c%c%c%c", (unsigned char) ((wr) & 0xff),
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(unsigned char) ((wr) >> 8) & 0xff,
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(unsigned char) ((wr) >> 16) & 0xff,
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(unsigned char) ((wr) >> 24) & 0xff);
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fprintf(f, "%c%c%c%c", (unsigned char) ((hr) & 0xff),
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(unsigned char) ((hr) >> 8) & 0xff,
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(unsigned char) ((hr) >> 16) & 0xff,
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(unsigned char) ((hr) >> 24) & 0xff);
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fprintf(f, "%c%c", (1) & 0xff, ((1) >> 8) & 0xff);
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fprintf(f, "%c%c", (24) & 0xff, ((24) >> 8) & 0xff);
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fprintf(f, "%c%c%c%c", (0) & 0xff, ((0) >> 8) & 0xff,
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((0) >> 16) & 0xff, ((0) >> 24) & 0xff);
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fprintf(f, "%c%c%c%c",
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(unsigned char) (3 * hr * wr +
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3 * hr * (wr % 2)) & 0xff,
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(unsigned char) ((hr * wr * 3 + 3 * hr * (wr % 2)) >>
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8) & 0xff,
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(unsigned char) ((hr * wr * 3 + 3 * hr * (wr % 2)) >>
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16) & 0xff,
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(unsigned char) ((hr * wr * 3 + 3 * hr * (wr % 2)) >>
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24) & 0xff);
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fprintf(f, "%c%c%c%c", (7834) & 0xff, ((7834) >> 8) & 0xff,
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((7834) >> 16) & 0xff, ((7834) >> 24) & 0xff);
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fprintf(f, "%c%c%c%c", (7834) & 0xff, ((7834) >> 8) & 0xff,
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((7834) >> 16) & 0xff, ((7834) >> 24) & 0xff);
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fprintf(f, "%c%c%c%c", (0) & 0xff, ((0) >> 8) & 0xff,
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((0) >> 16) & 0xff, ((0) >> 24) & 0xff);
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fprintf(f, "%c%c%c%c", (0) & 0xff, ((0) >> 8) & 0xff,
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((0) >> 16) & 0xff, ((0) >> 24) & 0xff);
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for (i = 0; i < wr * hr; i++) {
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unsigned char R, G, B;
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/* a modifier */
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// R = img->comps[0].data[w * h - ((i) / (w) + 1) * w + (i) % (w)];
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R = img->comps[0].data[w * hr - ((i) / (wr) + 1) * w + (i) % (wr)];
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// G = img->comps[1].data[w * h - ((i) / (w) + 1) * w + (i) % (w)];
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G = img->comps[1].data[w * hr - ((i) / (wr) + 1) * w + (i) % (wr)];
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// B = img->comps[2].data[w * h - ((i) / (w) + 1) * w + (i) % (w)];
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B = img->comps[2].data[w * hr - ((i) / (wr) + 1) * w + (i) % (wr)];
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fprintf(f, "%c%c%c", B, G, R);
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if ((i + 1) % wr == 0) {
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for (pad = (3 * wr) % 4 ? 4 - (3 * wr) % 4 : 0; pad > 0; pad--) /* ADD */
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fprintf(f, "%c", 0);
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}
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}
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fclose(f);
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free(img->comps[1].data);
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free(img->comps[2].data);
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}
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return 0;
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} |