mirror of https://github.com/FFmpeg/FFmpeg.git
GSoC'22 libavfilter/vf_chromakey_cuda.cu:the CUDA kernel for the filter libavfilter/vf_chromakey_cuda.c: the C side that calls the kernel and gets user input libavfilter/allfilters.c: added the filter to it libavfilter/Makefile: added the filter to it cuda/cuda_runtime.h: added two math CUDA functions that are used in the filter Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>release/5.1
Mohamed Khaled Mohamed
2 years ago
committed by
Timo Rothenpieler
parent
538cbaf18e
commit
b1648150b2
8 changed files with 722 additions and 1 deletions
@ -0,0 +1,498 @@ |
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/*
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* Copyright (c) 2022 Mohamed Khaled <Mohamed_Khaled_Kamal@outlook.com> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <float.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include "libavutil/avstring.h" |
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#include "libavutil/common.h" |
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#include "libavutil/hwcontext.h" |
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#include "libavutil/hwcontext_cuda_internal.h" |
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#include "libavutil/cuda_check.h" |
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#include "libavutil/internal.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "avfilter.h" |
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#include "formats.h" |
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#include "internal.h" |
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#include "video.h" |
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#include "cuda/load_helper.h" |
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static const enum AVPixelFormat supported_formats[] = { |
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AV_PIX_FMT_YUV420P, |
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AV_PIX_FMT_NV12, |
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AV_PIX_FMT_YUVA420P |
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}; |
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#define DIV_UP(a, b) (((a) + (b)-1) / (b)) |
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#define BLOCKX 32 |
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#define BLOCKY 16 |
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#define CHECK_CU(x) FF_CUDA_CHECK_DL(ctx, s->hwctx->internal->cuda_dl, x) |
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typedef struct ChromakeyCUDAContext { |
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const AVClass *class; |
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AVCUDADeviceContext *hwctx; |
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enum AVPixelFormat in_fmt, out_fmt; |
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const AVPixFmtDescriptor *in_desc, *out_desc; |
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int in_planes, out_planes; |
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int in_plane_depths[4]; |
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int in_plane_channels[4]; |
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uint8_t chromakey_rgba[4]; |
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uint16_t chromakey_uv[2]; |
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int is_yuv; |
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float similarity; |
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float blend; |
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AVBufferRef *frames_ctx; |
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AVFrame *frame; |
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AVFrame *tmp_frame; |
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CUcontext cu_ctx; |
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CUmodule cu_module; |
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CUfunction cu_func; |
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CUfunction cu_func_uv; |
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CUstream cu_stream; |
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} ChromakeyCUDAContext; |
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static av_cold int cudachromakey_init(AVFilterContext *ctx) |
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{ |
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ChromakeyCUDAContext *s = ctx->priv; |
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s->frame = av_frame_alloc(); |
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if (!s->frame) |
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return AVERROR(ENOMEM); |
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s->tmp_frame = av_frame_alloc(); |
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if (!s->tmp_frame) |
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return AVERROR(ENOMEM); |
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return 0; |
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} |
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static av_cold void cudachromakey_uninit(AVFilterContext *ctx) |
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{ |
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ChromakeyCUDAContext *s = ctx->priv; |
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if (s->hwctx && s->cu_module) |
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{ |
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CudaFunctions *cu = s->hwctx->internal->cuda_dl; |
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CUcontext context; |
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CHECK_CU(cu->cuCtxPushCurrent(s->hwctx->cuda_ctx)); |
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CHECK_CU(cu->cuModuleUnload(s->cu_module)); |
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s->cu_module = NULL; |
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CHECK_CU(cu->cuCtxPopCurrent(&context)); |
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} |
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av_frame_free(&s->frame); |
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av_buffer_unref(&s->frames_ctx); |
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av_frame_free(&s->tmp_frame); |
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} |
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static av_cold int init_hwframe_ctx(ChromakeyCUDAContext *s, AVBufferRef *device_ctx, int width, int height) |
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{ |
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AVBufferRef *out_ref = NULL; |
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AVHWFramesContext *out_ctx; |
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int ret; |
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out_ref = av_hwframe_ctx_alloc(device_ctx); |
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if (!out_ref) |
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return AVERROR(ENOMEM); |
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out_ctx = (AVHWFramesContext *)out_ref->data; |
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out_ctx->format = AV_PIX_FMT_CUDA; |
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out_ctx->sw_format = s->out_fmt; |
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out_ctx->width = width; |
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out_ctx->height = height; |
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ret = av_hwframe_ctx_init(out_ref); |
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if (ret < 0) |
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goto fail; |
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av_frame_unref(s->frame); |
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ret = av_hwframe_get_buffer(out_ref, s->frame, 0); |
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if (ret < 0) |
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goto fail; |
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av_buffer_unref(&s->frames_ctx); |
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s->frames_ctx = out_ref; |
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return 0; |
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fail: |
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av_buffer_unref(&out_ref); |
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return ret; |
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} |
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static int format_is_supported(enum AVPixelFormat fmt) |
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{ |
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int i; |
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for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++) |
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if (supported_formats[i] == fmt) |
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return 1; |
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return 0; |
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} |
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static av_cold void set_format_info(AVFilterContext *ctx, enum AVPixelFormat in_format, enum AVPixelFormat out_format) |
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{ |
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ChromakeyCUDAContext *s = ctx->priv; |
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int i, p, d; |
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s->in_fmt = in_format; |
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s->out_fmt = out_format; |
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s->in_desc = av_pix_fmt_desc_get(s->in_fmt); |
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s->out_desc = av_pix_fmt_desc_get(s->out_fmt); |
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s->in_planes = av_pix_fmt_count_planes(s->in_fmt); |
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s->out_planes = av_pix_fmt_count_planes(s->out_fmt); |
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// find maximum step of each component of each plane
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// For our subset of formats, this should accurately tell us how many channels CUDA needs
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// i.e. 1 for Y plane, 2 for UV plane of NV12, 4 for single plane of RGB0 formats
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for (i = 0; i < s->in_desc->nb_components; i++) |
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{ |
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d = (s->in_desc->comp[i].depth + 7) / 8; |
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p = s->in_desc->comp[i].plane; |
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s->in_plane_channels[p] = FFMAX(s->in_plane_channels[p], s->in_desc->comp[i].step / d); |
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s->in_plane_depths[p] = s->in_desc->comp[i].depth; |
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} |
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} |
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static av_cold int init_processing_chain(AVFilterContext *ctx, int width, int height) |
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{ |
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ChromakeyCUDAContext *s = ctx->priv; |
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AVHWFramesContext *in_frames_ctx; |
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int ret; |
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/* check that we have a hw context */ |
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if (!ctx->inputs[0]->hw_frames_ctx) |
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{ |
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av_log(ctx, AV_LOG_ERROR, "No hw context provided on input\n"); |
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return AVERROR(EINVAL); |
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} |
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in_frames_ctx = (AVHWFramesContext *)ctx->inputs[0]->hw_frames_ctx->data; |
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if (!format_is_supported(in_frames_ctx->sw_format)) |
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{ |
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av_log(ctx, AV_LOG_ERROR, "Unsupported format: %s\n", av_get_pix_fmt_name(in_frames_ctx->sw_format)); |
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return AVERROR(ENOSYS); |
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} |
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set_format_info(ctx, in_frames_ctx->sw_format, AV_PIX_FMT_YUVA420P); |
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ret = init_hwframe_ctx(s, in_frames_ctx->device_ref, width, height); |
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if (ret < 0) |
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return ret; |
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ctx->outputs[0]->hw_frames_ctx = av_buffer_ref(s->frames_ctx); |
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if (!ctx->outputs[0]->hw_frames_ctx) |
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return AVERROR(ENOMEM); |
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return 0; |
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} |
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static av_cold int cudachromakey_load_functions(AVFilterContext *ctx) |
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{ |
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ChromakeyCUDAContext *s = ctx->priv; |
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CUcontext context, cuda_ctx = s->hwctx->cuda_ctx; |
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CudaFunctions *cu = s->hwctx->internal->cuda_dl; |
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int ret; |
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extern const unsigned char ff_vf_chromakey_cuda_ptx_data[]; |
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extern const unsigned int ff_vf_chromakey_cuda_ptx_len; |
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ret = CHECK_CU(cu->cuCtxPushCurrent(cuda_ctx)); |
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if (ret < 0) |
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return ret; |
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ret = ff_cuda_load_module(ctx, s->hwctx, &s->cu_module, |
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ff_vf_chromakey_cuda_ptx_data, ff_vf_chromakey_cuda_ptx_len); |
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if (ret < 0) |
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goto fail; |
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ret = CHECK_CU(cu->cuModuleGetFunction(&s->cu_func, s->cu_module, "Process_uchar")); |
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if (ret < 0) |
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{ |
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av_log(ctx, AV_LOG_FATAL, "Failed loading Process_uchar\n"); |
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goto fail; |
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} |
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ret = CHECK_CU(cu->cuModuleGetFunction(&s->cu_func_uv, s->cu_module, "Process_uchar2")); |
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if (ret < 0) |
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{ |
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av_log(ctx, AV_LOG_FATAL, "Failed loading Process_uchar2\n"); |
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goto fail; |
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} |
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fail: |
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CHECK_CU(cu->cuCtxPopCurrent(&context)); |
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return ret; |
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} |
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#define FIXNUM(x) lrint((x) * (1 << 10)) |
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#define RGB_TO_U(rgb) (((-FIXNUM(0.16874) * rgb[0] - FIXNUM(0.33126) * rgb[1] + FIXNUM(0.50000) * rgb[2] + (1 << 9) - 1) >> 10) + 128) |
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#define RGB_TO_V(rgb) (((FIXNUM(0.50000) * rgb[0] - FIXNUM(0.41869) * rgb[1] - FIXNUM(0.08131) * rgb[2] + (1 << 9) - 1) >> 10) + 128) |
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static av_cold int cudachromakey_config_props(AVFilterLink *outlink) |
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{ |
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AVFilterContext *ctx = outlink->src; |
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AVFilterLink *inlink = outlink->src->inputs[0]; |
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ChromakeyCUDAContext *s = ctx->priv; |
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AVHWFramesContext *frames_ctx = (AVHWFramesContext *)inlink->hw_frames_ctx->data; |
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AVCUDADeviceContext *device_hwctx = frames_ctx->device_ctx->hwctx; |
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int ret; |
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s->hwctx = device_hwctx; |
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s->cu_stream = s->hwctx->stream; |
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if (s->is_yuv) { |
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s->chromakey_uv[0] = s->chromakey_rgba[1]; |
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s->chromakey_uv[1] = s->chromakey_rgba[2]; |
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} else { |
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s->chromakey_uv[0] = RGB_TO_U(s->chromakey_rgba); |
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s->chromakey_uv[1] = RGB_TO_V(s->chromakey_rgba); |
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} |
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ret = init_processing_chain(ctx, inlink->w, inlink->h); |
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if (ret < 0) |
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return ret; |
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outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; |
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ret = cudachromakey_load_functions(ctx); |
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if (ret < 0) |
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return ret; |
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return 0; |
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} |
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static int call_cuda_kernel(AVFilterContext *ctx, CUfunction func, |
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CUtexObject src_tex[3], AVFrame *out_frame, |
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int width, int height, int pitch, |
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int width_uv, int height_uv, int pitch_uv, |
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float u_key, float v_key, float similarity, |
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float blend) |
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{ |
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ChromakeyCUDAContext *s = ctx->priv; |
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CudaFunctions *cu = s->hwctx->internal->cuda_dl; |
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CUdeviceptr dst_devptr[4] = { |
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(CUdeviceptr)out_frame->data[0], (CUdeviceptr)out_frame->data[1], |
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(CUdeviceptr)out_frame->data[2], (CUdeviceptr)out_frame->data[3] |
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}; |
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void *args_uchar[] = { |
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&src_tex[0], &src_tex[1], &src_tex[2], |
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&dst_devptr[0], &dst_devptr[1], &dst_devptr[2], &dst_devptr[3], |
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&width, &height, &pitch, |
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&width_uv, &height_uv, &pitch_uv, |
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&u_key, &v_key, &similarity, &blend |
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}; |
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return CHECK_CU(cu->cuLaunchKernel(func, |
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DIV_UP(width, BLOCKX), DIV_UP(height, BLOCKY), 1, |
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BLOCKX, BLOCKY, 1, 0, s->cu_stream, args_uchar, NULL)); |
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} |
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static int cudachromakey_process_internal(AVFilterContext *ctx, |
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AVFrame *out, AVFrame *in) |
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{ |
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ChromakeyCUDAContext *s = ctx->priv; |
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CudaFunctions *cu = s->hwctx->internal->cuda_dl; |
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CUcontext context, cuda_ctx = s->hwctx->cuda_ctx; |
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int i, ret; |
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CUtexObject tex[3] = {0, 0, 0}; |
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ret = CHECK_CU(cu->cuCtxPushCurrent(cuda_ctx)); |
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if (ret < 0) |
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return ret; |
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for (i = 0; i < s->in_planes; i++) |
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{ |
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CUDA_TEXTURE_DESC tex_desc = { |
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.filterMode = CU_TR_FILTER_MODE_LINEAR, |
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.flags = 0, // CU_TRSF_READ_AS_INTEGER to get raw ints instead of normalized floats from tex2D
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}; |
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CUDA_RESOURCE_DESC res_desc = { |
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.resType = CU_RESOURCE_TYPE_PITCH2D, |
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.res.pitch2D.format = CU_AD_FORMAT_UNSIGNED_INT8, |
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.res.pitch2D.numChannels = s->in_plane_channels[i], |
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.res.pitch2D.pitchInBytes = in->linesize[i], |
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.res.pitch2D.devPtr = (CUdeviceptr)in->data[i], |
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}; |
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if (i == 1 || i == 2) |
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{ |
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res_desc.res.pitch2D.width = AV_CEIL_RSHIFT(in->width, s->in_desc->log2_chroma_w); |
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res_desc.res.pitch2D.height = AV_CEIL_RSHIFT(in->height, s->in_desc->log2_chroma_h); |
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} |
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else |
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{ |
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res_desc.res.pitch2D.width = in->width; |
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res_desc.res.pitch2D.height = in->height; |
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} |
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ret = CHECK_CU(cu->cuTexObjectCreate(&tex[i], &res_desc, &tex_desc, NULL)); |
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if (ret < 0) |
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goto exit; |
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} |
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ret = call_cuda_kernel(ctx, (s->in_plane_channels[1] > 1) ? s->cu_func_uv : s->cu_func, |
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tex, out, |
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out->width, out->height, out->linesize[0], |
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AV_CEIL_RSHIFT(out->width, s->out_desc->log2_chroma_w), |
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AV_CEIL_RSHIFT(out->height, s->out_desc->log2_chroma_h), |
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out->linesize[1], |
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s->chromakey_uv[0], s->chromakey_uv[1], |
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s->similarity, s->blend); |
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if (ret < 0) |
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goto exit; |
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exit: |
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for (i = 0; i < s->in_planes; i++) |
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if (tex[i]) |
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CHECK_CU(cu->cuTexObjectDestroy(tex[i])); |
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CHECK_CU(cu->cuCtxPopCurrent(&context)); |
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return ret; |
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} |
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static int cudachromakey_process(AVFilterContext *ctx, AVFrame *out, AVFrame *in) |
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{ |
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ChromakeyCUDAContext *s = ctx->priv; |
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AVFrame *src = in; |
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int ret; |
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ret = cudachromakey_process_internal(ctx, s->frame, src); |
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if (ret < 0) |
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return ret; |
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src = s->frame; |
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ret = av_hwframe_get_buffer(src->hw_frames_ctx, s->tmp_frame, 0); |
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if (ret < 0) |
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return ret; |
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av_frame_move_ref(out, s->frame); |
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av_frame_move_ref(s->frame, s->tmp_frame); |
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ret = av_frame_copy_props(out, in); |
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if (ret < 0) |
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return ret; |
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return 0; |
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} |
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static int cudachromakey_filter_frame(AVFilterLink *link, AVFrame *in) |
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{ |
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AVFilterContext *ctx = link->dst; |
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ChromakeyCUDAContext *s = ctx->priv; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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CudaFunctions *cu = s->hwctx->internal->cuda_dl; |
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|
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AVFrame *out = NULL; |
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CUcontext context; |
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int ret = 0; |
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|
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out = av_frame_alloc(); |
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if (!out) |
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{ |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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|
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ret = CHECK_CU(cu->cuCtxPushCurrent(s->hwctx->cuda_ctx)); |
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if (ret < 0) |
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goto fail; |
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ret = cudachromakey_process(ctx, out, in); |
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|
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CHECK_CU(cu->cuCtxPopCurrent(&context)); |
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if (ret < 0) |
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goto fail; |
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av_frame_free(&in); |
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return ff_filter_frame(outlink, out); |
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fail: |
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av_frame_free(&in); |
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av_frame_free(&out); |
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return ret; |
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} |
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|
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#define OFFSET(x) offsetof(ChromakeyCUDAContext, x) |
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#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM) |
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static const AVOption options[] = { |
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{"color", "set the chromakey key color", OFFSET(chromakey_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, 0, 0, FLAGS}, |
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{"similarity", "set the chromakey similarity value", OFFSET(similarity), AV_OPT_TYPE_FLOAT, {.dbl = 0.01}, 0.01, 1.0, FLAGS}, |
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{"blend", "set the chromakey key blend value", OFFSET(blend), AV_OPT_TYPE_FLOAT, {.dbl = 0.0}, 0.0, 1.0, FLAGS}, |
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{"yuv", "color parameter is in yuv instead of rgb", OFFSET(is_yuv), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS}, |
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{NULL}, |
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}; |
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|
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static const AVClass cudachromakey_class = { |
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.class_name = "cudachromakey", |
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.item_name = av_default_item_name, |
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.option = options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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|
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static const AVFilterPad cudachromakey_inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.filter_frame = cudachromakey_filter_frame, |
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}, |
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}; |
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|
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static const AVFilterPad cudachromakey_outputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = cudachromakey_config_props, |
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}, |
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}; |
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|
||||
const AVFilter ff_vf_chromakey_cuda = { |
||||
.name = "chromakey_cuda", |
||||
.description = NULL_IF_CONFIG_SMALL("GPU accelerated chromakey filter"), |
||||
|
||||
.init = cudachromakey_init, |
||||
.uninit = cudachromakey_uninit, |
||||
|
||||
.priv_size = sizeof(ChromakeyCUDAContext), |
||||
.priv_class = &cudachromakey_class, |
||||
|
||||
FILTER_INPUTS(cudachromakey_inputs), |
||||
FILTER_OUTPUTS(cudachromakey_outputs), |
||||
|
||||
FILTER_SINGLE_PIXFMT(AV_PIX_FMT_CUDA), |
||||
|
||||
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE, |
||||
}; |
||||
@ -0,0 +1,174 @@ |
||||
/* |
||||
* Copyright (c) 2022 Mohamed Khaled <Mohamed_Khaled_Kamal@outlook.com> |
||||
* |
||||
* This file is part of FFmpeg. |
||||
* |
||||
* FFmpeg is free software; you can redistribute it and/or |
||||
* modify it under the terms of the GNU Lesser General Public |
||||
* License as published by the Free Software Foundation; either |
||||
* version 2.1 of the License, or (at your option) any later version. |
||||
* |
||||
* FFmpeg is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
||||
* Lesser General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU Lesser General Public |
||||
* License along with FFmpeg; if not, write to the Free Software |
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
||||
*/ |
||||
|
||||
#include "cuda/vector_helpers.cuh" |
||||
|
||||
extern "C" |
||||
{ |
||||
|
||||
/** |
||||
* @brief function contains the main logic of chroma keying, and changes the alpahc channel with the suitable value |
||||
* |
||||
* @param src_tex texture U or texture UV , decided based on the passed is_uchar2 flag |
||||
* @param src_tex_V texture V , used only if is_uchar2 flag is false |
||||
* @param dst_A alpha channel destination |
||||
* @param width_uv width of uv channels |
||||
* @param height_uv height of uv channels |
||||
* @param width width of alpha channel |
||||
* @param height height of alpha channel |
||||
* @param pitch pitch of alpha channel |
||||
* @param x current x coordinate of pixel |
||||
* @param y current y coordinate of pixel |
||||
* @param chromakey_uv uv values for chroma keying |
||||
* @param similarity similarity of keying |
||||
* @param blend blend of keying |
||||
*/ |
||||
__device__ static inline void change_alpha_channel( |
||||
cudaTextureObject_t src_tex, cudaTextureObject_t src_tex_V, uchar *dst_A, |
||||
int width_uv, int height_uv, |
||||
int width, int height, int pitch, |
||||
int x, int y, |
||||
float2 chromakey_uv, float similarity, float blend) |
||||
{ |
||||
int window_size = 3; |
||||
int start_r = x - window_size / 2; |
||||
int start_c = y - window_size / 2; |
||||
int resize_ratio = width / width_uv; |
||||
int counter = 0; |
||||
float diff = 0.0f; |
||||
float du, dv; |
||||
uchar alpha_value; |
||||
|
||||
// loop over the eight neighbourhood of the current pixel(x,y) |
||||
for (uchar i = 0; i < window_size; i++) |
||||
{ |
||||
for (uchar j = 0; j < window_size; j++) |
||||
{ |
||||
float u_value, v_value; |
||||
int r = start_r + i; |
||||
int c = start_c + j; |
||||
|
||||
if (r < 0 || r >= width_uv || c < 0 || c >= height_uv) |
||||
continue; |
||||
|
||||
if (!src_tex_V) { |
||||
float2 temp_uv = tex2D<float2>(src_tex, r, c); |
||||
u_value = temp_uv.x; |
||||
v_value = temp_uv.y; |
||||
} else { |
||||
u_value = tex2D<float>(src_tex, r, c); |
||||
v_value = tex2D<float>(src_tex_V, r, c); |
||||
} |
||||
|
||||
du = (u_value * 255.0f) - chromakey_uv.x; |
||||
dv = (v_value * 255.0f) - chromakey_uv.y; |
||||
diff += sqrtf((du * du + dv * dv) / (255.0f * 255.0f * 2.f)); |
||||
|
||||
counter++; |
||||
} |
||||
} |
||||
|
||||
if (counter > 0) |
||||
diff = diff / counter; |
||||
else |
||||
diff /= 9.0f; |
||||
|
||||
if (blend>0.0001f) |
||||
alpha_value = __saturatef((diff - similarity) / blend) * 255; |
||||
else |
||||
alpha_value = (diff < similarity) ? 0 : 255; |
||||
|
||||
//write the value in the alpha channel with regarding the ratio of (alpha_size : uv_size) |
||||
for (uchar k = 0; k < resize_ratio; k++) |
||||
{ |
||||
for (uchar l = 0; l < resize_ratio; l++) |
||||
{ |
||||
int x_resize = x * resize_ratio + k; |
||||
int y_resize = y * resize_ratio + l; |
||||
int a_channel_resize = y_resize * pitch + x_resize; |
||||
|
||||
if (y_resize >= height || x_resize >= width) |
||||
continue; |
||||
|
||||
dst_A[a_channel_resize] = alpha_value; |
||||
} |
||||
} |
||||
} |
||||
|
||||
__global__ void Process_uchar( |
||||
cudaTextureObject_t src_tex_Y, cudaTextureObject_t src_tex_U, cudaTextureObject_t src_tex_V, |
||||
uchar *dst_Y, uchar *dst_U, uchar *dst_V, uchar *dst_A, |
||||
int width, int height, int pitch, |
||||
int width_uv, int height_uv, int pitch_uv, |
||||
float u_key, float v_key, float similarity, float blend) |
||||
{ |
||||
int x = blockIdx.x * blockDim.x + threadIdx.x; |
||||
int y = blockIdx.y * blockDim.y + threadIdx.y; |
||||
|
||||
if (y >= height || x >= width) |
||||
return; |
||||
|
||||
dst_Y[y * pitch + x] = tex2D<float>(src_tex_Y, x, y)*255; |
||||
|
||||
if (y >= height_uv || x >= width_uv) |
||||
return; |
||||
|
||||
int uv_index = y * pitch_uv + x; |
||||
dst_U[uv_index] = tex2D<float>(src_tex_U, x, y) * 255; |
||||
dst_V[uv_index] = tex2D<float>(src_tex_V, x, y) * 255; |
||||
|
||||
change_alpha_channel(src_tex_U, src_tex_V, dst_A, |
||||
width_uv, height_uv, |
||||
width, height, pitch, |
||||
x, y, |
||||
make_float2(u_key, v_key), similarity, blend); |
||||
} |
||||
|
||||
__global__ void Process_uchar2( |
||||
cudaTextureObject_t src_tex_Y, cudaTextureObject_t src_tex_UV, cudaTextureObject_t unused1, |
||||
uchar *dst_Y, uchar *dst_U, uchar *dst_V, uchar *dst_A, |
||||
int width, int height, int pitch, |
||||
int width_uv, int height_uv,int pitch_uv, |
||||
float u_key, float v_key, float similarity, float blend) |
||||
{ |
||||
int x = blockIdx.x * blockDim.x + threadIdx.x; // x coordinate of current pixel |
||||
int y = blockIdx.y * blockDim.y + threadIdx.y; // y coordinate of current pixel |
||||
|
||||
if (y >= height || x >= width) |
||||
return; |
||||
|
||||
dst_Y[y * pitch + x] = tex2D<float>(src_tex_Y, x, y) * 255; |
||||
|
||||
if (y >= height_uv || x >= width_uv) |
||||
return; |
||||
|
||||
int uv_index = y * pitch_uv + x; |
||||
float2 uv_temp = tex2D<float2>(src_tex_UV, x, y); |
||||
dst_U[uv_index] = uv_temp.x * 255; |
||||
dst_V[uv_index] = uv_temp.y * 255; |
||||
|
||||
change_alpha_channel(src_tex_UV, (cudaTextureObject_t)nullptr, |
||||
dst_A, width_uv, height_uv, |
||||
width, height, pitch, |
||||
x, y, |
||||
make_float2(u_key, v_key), similarity, blend); |
||||
} |
||||
|
||||
} |
||||
Loading…
Reference in new issue