37 lines
1.1 KiB
Plaintext
37 lines
1.1 KiB
Plaintext
// Copyright (c) OpenMMLab. All rights reserved.
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#include <stdint.h>
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namespace mmdeploy {
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namespace cuda {
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template <int channels>
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__global__ void cast(const uint8_t *src, int height, int width, float *dst) {
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int x = blockIdx.x * blockDim.x + threadIdx.x;
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int y = blockIdx.y * blockDim.y + threadIdx.y;
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if (x >= width || y >= height) return;
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int loc = (y * width + x) * channels;
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for (int i = 0; i < channels; ++i) {
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dst[loc + i] = src[loc + i];
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}
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}
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template <int channels>
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void CastToFloat(const uint8_t *src, int height, int width, float *dst, cudaStream_t stream) {
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const dim3 thread_block(32, 8);
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const dim3 block_num((width + thread_block.x - 1) / thread_block.x,
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(height + thread_block.y - 1) / thread_block.y);
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cast<channels><<<block_num, thread_block, 0, stream>>>(src, height, width, dst);
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}
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template void CastToFloat<3>(const uint8_t *src, int height, int width, float *dst,
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cudaStream_t stream);
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template void CastToFloat<1>(const uint8_t *src, int height, int width, float *dst,
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cudaStream_t stream);
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} // namespace cuda
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} // namespace mmdeploy
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