mirror of
https://github.com/tiagovignatti/intel-gpu-tools.git
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f9a50de3dc
A realtime display of GPU activity. Note, this is just at the point of minimum usability... Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
#include <stdint.h>
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#include <stdlib.h>
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#include "rgb2yuv.h"
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static int RGB2YUV_YR[256], RGB2YUV_YG[256], RGB2YUV_YB[256];
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static int RGB2YUV_UR[256], RGB2YUV_UG[256], RGB2YUV_UBVR[256];
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static int RGB2YUV_VG[256], RGB2YUV_VB[256];
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void rgb2yuv_init(void)
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{
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int i;
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for (i = 0; i < 256; i++)
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RGB2YUV_YR[i] = 65.481 * (i << 8);
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for (i = 0; i < 256; i++)
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RGB2YUV_YG[i] = 128.553 * (i << 8);
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for (i = 0; i < 256; i++)
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RGB2YUV_YB[i] = 24.966 * (i << 8);
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for (i = 0; i < 256; i++)
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RGB2YUV_UR[i] = 37.797 * (i << 8);
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for (i = 0; i < 256; i++)
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RGB2YUV_UG[i] = 74.203 * (i << 8);
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for (i = 0; i < 256; i++)
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RGB2YUV_VG[i] = 93.786 * (i << 8);
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for (i = 0; i < 256; i++)
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RGB2YUV_VB[i] = 18.214 * (i << 8);
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for (i = 0; i < 256; i++)
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RGB2YUV_UBVR[i] = 112 * (i << 8);
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}
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int rgb2yuv(cairo_surface_t *surface, XvImage *image, uint8_t *yuv)
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{
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uint8_t *data = cairo_image_surface_get_data(surface);
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int rgb_stride = cairo_image_surface_get_stride(surface);
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int width = cairo_image_surface_get_width(surface);
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int height = cairo_image_surface_get_height(surface);
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int y_stride = image->pitches[0];
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int uv_stride = image->pitches[1];
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uint8_t *tmp, *tl, *tr, *bl, *br;
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int i, j;
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tmp = malloc(2*width*height);
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if (tmp == NULL)
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return 0;
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tl = tmp;
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bl = tmp + width*height;
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for (i = 0; i < height; i++) {
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uint16_t *rgb = (uint16_t *)(data + i * rgb_stride);
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for (j = 0; j < width; j++) {
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uint8_t r = (rgb[j] >> 11) & 0x1f;
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uint8_t g = (rgb[j] >> 5) & 0x3f;
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uint8_t b = (rgb[j] >> 0) & 0x1f;
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r = r<<3 | r>>2;
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g = g<<2 | g>>4;
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b = b<<3 | b>>2;
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yuv[j] = (RGB2YUV_YR[r] + RGB2YUV_YG[g] + RGB2YUV_YB[b] + 1048576) >> 16;
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*tl++ = (-RGB2YUV_UR[r] - RGB2YUV_UG[g] + RGB2YUV_UBVR[b] + 8388608) >> 16;
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*bl++ = (RGB2YUV_UBVR[r] - RGB2YUV_VG[g] - RGB2YUV_VB[b] + 8388608) >> 16;
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}
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yuv += y_stride;
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}
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tl = tmp; tr = tl + 1;
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bl = tl + width; br = bl + 1;
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for (i = 0; i < height/2; i ++) {
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for (j = 0; j < width/2; j ++) {
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yuv[j] = ((int)*tl + *tr + *bl + *br) >> 2;
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tl += 2; tr += 2;
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bl += 2; br += 2;
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}
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yuv += uv_stride;
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tl += width; tr += width;
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bl += width; br += width;
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}
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tl = tmp + width*height; tr = tl + 1;
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bl = tl + width; br = bl + 1;
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for (i = 0; i < height/2; i++) {
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for (j = 0; j < width/2; j++) {
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yuv[j] = ((int)*tl + *tr + *bl + *br) >> 2;
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tl += 2; tr += 2;
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bl += 2; br += 2;
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}
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yuv += uv_stride;
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tl += width; tr += width;
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bl += width; br += width;
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}
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free(tmp);
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return 1;
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}
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