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45 lines
1.7 KiB
45 lines
1.7 KiB
#include <string.h>
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#include <assert.h>
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#include "clutil.h"
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#include "rgb_to_yuv.h"
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void rgb_to_yuv_init(RGBToYUVState* s, cl_context ctx, cl_device_id device_id, int width, int height, int rgb_stride) {
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memset(s, 0, sizeof(*s));
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printf("width %d, height %d, rgb_stride %d\n", width, height, rgb_stride);
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assert(width % 2 == 0);
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assert(height % 2 == 0);
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s->width = width;
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s->height = height;
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char args[1024];
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snprintf(args, sizeof(args),
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"-cl-fast-relaxed-math -cl-denorms-are-zero "
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#ifdef CL_DEBUG
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"-DCL_DEBUG "
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#endif
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"-DWIDTH=%d -DHEIGHT=%d -DUV_WIDTH=%d -DUV_HEIGHT=%d -DRGB_STRIDE=%d -DRGB_SIZE=%d",
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width, height, width/ 2, height / 2, rgb_stride, width * height);
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cl_program prg = cl_program_from_file(ctx, device_id, "transforms/rgb_to_yuv.cl", args);
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s->rgb_to_yuv_krnl = CL_CHECK_ERR(clCreateKernel(prg, "rgb_to_yuv", &err));
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// done with this
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CL_CHECK(clReleaseProgram(prg));
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}
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void rgb_to_yuv_destroy(RGBToYUVState* s) {
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CL_CHECK(clReleaseKernel(s->rgb_to_yuv_krnl));
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}
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void rgb_to_yuv_queue(RGBToYUVState* s, cl_command_queue q, cl_mem rgb_cl, cl_mem yuv_cl) {
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CL_CHECK(clSetKernelArg(s->rgb_to_yuv_krnl, 0, sizeof(cl_mem), &rgb_cl));
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CL_CHECK(clSetKernelArg(s->rgb_to_yuv_krnl, 1, sizeof(cl_mem), &yuv_cl));
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const size_t work_size[2] = {
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(size_t)(s->width + (s->width % 4 == 0 ? 0 : (4 - s->width % 4))) / 4,
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(size_t)(s->height + (s->height % 4 == 0 ? 0 : (4 - s->height % 4))) / 4
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};
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cl_event event;
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CL_CHECK(clEnqueueNDRangeKernel(q, s->rgb_to_yuv_krnl, 2, NULL, &work_size[0], NULL, 0, 0, &event));
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CL_CHECK(clWaitForEvents(1, &event));
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CL_CHECK(clReleaseEvent(event));
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}
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