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common.c
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common.c
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#include <assert.h>
#include <errno.h>
#include <getopt.h>
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "common.h"
#include "dsp.h"
void dequantize_idct_row(int16_t *in_data, uint8_t *prediction, int w, int h,
int y, uint8_t *out_data, uint8_t *quantization)
{
int x;
int16_t block[8*8];
/* Perform the dequantization and iDCT */
for(x = 0; x < w; x += 8)
{
int i, j;
dequant_idct_block_8x8(in_data+(x*8), block, quantization);
for (i = 0; i < 8; ++i)
{
for (j = 0; j < 8; ++j)
{
/* Add prediction block. Note: DCT is not precise -
Clamp to legal values */
int16_t tmp = block[i*8+j] + (int16_t)prediction[i*w+j+x];
if (tmp < 0) { tmp = 0; }
else if (tmp > 255) { tmp = 255; }
out_data[i*w+j+x] = tmp;
}
}
}
}
void dequantize_idct(int16_t *in_data, uint8_t *prediction, uint32_t width,
uint32_t height, uint8_t *out_data, uint8_t *quantization)
{
int y;
for (y = 0; y < height; y += 8)
{
dequantize_idct_row(in_data+y*width, prediction+y*width, width, height, y,
out_data+y*width, quantization);
}
}
void dct_quantize_row(uint8_t *in_data, uint8_t *prediction, int w, int h,
int16_t *out_data, uint8_t *quantization)
{
int x;
int16_t block[8*8];
/* Perform the DCT and quantization */
for(x = 0; x < w; x += 8)
{
int i, j;
for (i = 0; i < 8; ++i)
{
for (j = 0; j < 8; ++j)
{
block[i*8+j] = ((int16_t)in_data[i*w+j+x] - prediction[i*w+j+x]);
}
}
/* Store MBs linear in memory, i.e. the 64 coefficients are stored
continous. This allows us to ignore stride in DCT/iDCT and other
functions. */
dct_quant_block_8x8(block, out_data+(x*8), quantization);
}
}
void dct_quantize(uint8_t *in_data, uint8_t *prediction, uint32_t width,
uint32_t height, int16_t *out_data, uint8_t *quantization)
{
int y;
for (y = 0; y < height; y += 8)
{
dct_quantize_row(in_data+y*width, prediction+y*width, width, height,
out_data+y*width, quantization);
}
}
void destroy_frame(struct frame *f)
{
/* First frame doesn't have a reconstructed frame to destroy */
if (!f) { return; }
free(f->recons->Y);
free(f->recons->U);
free(f->recons->V);
free(f->recons);
free(f->residuals->Ydct);
free(f->residuals->Udct);
free(f->residuals->Vdct);
free(f->residuals);
free(f->predicted->Y);
free(f->predicted->U);
free(f->predicted->V);
free(f->predicted);
free(f->mbs[Y_COMPONENT]);
free(f->mbs[U_COMPONENT]);
free(f->mbs[V_COMPONENT]);
free(f);
}
struct frame* create_frame(struct c63_common *cm, yuv_t *image)
{
struct frame *f = malloc(sizeof(struct frame));
f->orig = image;
f->recons = malloc(sizeof(yuv_t));
f->recons->Y = malloc(cm->ypw * cm->yph);
f->recons->U = malloc(cm->upw * cm->uph);
f->recons->V = malloc(cm->vpw * cm->vph);
f->predicted = malloc(sizeof(yuv_t));
f->predicted->Y = calloc(cm->ypw * cm->yph, sizeof(uint8_t));
f->predicted->U = calloc(cm->upw * cm->uph, sizeof(uint8_t));
f->predicted->V = calloc(cm->vpw * cm->vph, sizeof(uint8_t));
f->residuals = malloc(sizeof(dct_t));
f->residuals->Ydct = calloc(cm->ypw * cm->yph, sizeof(int16_t));
f->residuals->Udct = calloc(cm->upw * cm->uph, sizeof(int16_t));
f->residuals->Vdct = calloc(cm->vpw * cm->vph, sizeof(int16_t));
f->mbs[Y_COMPONENT] =
calloc(cm->mb_rows * cm->mb_cols, sizeof(struct macroblock));
f->mbs[U_COMPONENT] =
calloc(cm->mb_rows/2 * cm->mb_cols/2, sizeof(struct macroblock));
f->mbs[V_COMPONENT] =
calloc(cm->mb_rows/2 * cm->mb_cols/2, sizeof(struct macroblock));
return f;
}
void dump_image(yuv_t *image, int w, int h, FILE *fp)
{
fwrite(image->Y, 1, w*h, fp);
fwrite(image->U, 1, w*h/4, fp);
fwrite(image->V, 1, w*h/4, fp);
}