将四个嵌套循环转换为CUDA内核 [英] Translating four nested loops into a CUDA kernel
本文介绍了将四个嵌套循环转换为CUDA内核的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我写的CUDA程序，添加模糊效果到BMP文件。我写了工作程序，这样做在CPU上，现在我试图将代码转换为CUDA。这是我想在CUDA上工作的函数：
void blur（bitmap_header * hp，unsigned char * data）
{
int xx，yy，x，y，avgB，avgG，avgR，ile;
int blurSize = 5;
for（xx = 0; xx< hp-> width; xx ++）
{
for（yy = 0; yy< hp-> height; yy ++）
{
avgB = avgG = avgR = 0;
ile = 0;
for（x = xx; x< hp-> width&& x< xx + blurSize; x ++）
{
for（y = yy; y< hp-> height&& y< yy + blurSize; y ++）
{
avgB + = data [x * 3 + y * hp - > width * 3 + 0];
avgG + = data [x * 3 + y * hp-> width * 3 + 1];
avgR + = data [x * 3 + y * hp-> width * 3 + 2];
ile ++;
}
}
avgB = avgB / ile;
avgG = avgG / ile;
avgR = avgR / ile;
data [xx * 3 + yy * hp-> width * 3 + 0] = avgB;
data [xx * 3 + yy * hp-> width * 3 + 1] = avgG;
data [xx * 3 + yy * hp-> width * 3 + 2] = avgR;
}
}
}
在CUDA设备上工作？
每个教程只包含一个for循环并使用
int i = threadIdx.x
我关于此程序的上一个问题：
使用C 对位图的模糊效果
EDIT
FULL CODE with CUDA edits：
#include< stdio.h>
#include< stdlib.h>
#include< Windows.h>
#pragma pack（push，1）
/ * Windows 3.x位图文件头* /
typedef struct {
char filetype [2 ]; / * magic - always'B''M'* /
unsigned int filesize;
short reserved1;
short reserved2;
unsigned int dataoffset; / *以字节为单位的偏移量到实际位图数据* /
} file_header;
/ * Windows 3.x位图完整头，包括文件头* /
typedef struct {
file_header fileheader;
unsigned int headersize;
int width
int height;
短飞机
short bitsperpixel; / *我们只支持值24这里* /
unsigned int compression; / *我们不支持压缩* /
unsigned int bitmapsize;
int horizontalres;
int verticalres;
unsigned int numcolors;
unsigned int importantcolors;
} bitmap_header;
#pragma pack（pop）
__global__ void blur（bitmap_header * hp，unsigned char * data）
{
int xx，yy，x，y，avgB ，avgG，avgR，ile;
int blurSize = 5;
xx = blockIdy.y * blockDim.y + threadIdx.y;
yy = blockIdx.x * blockDim.x + threadIdx.x;
if（xx> = hp-> width || yy> = hp-> height）
return;
avgB = avgG = avgR = 0;
ile = 0;
for（x = xx; x< hp-> width&& x< xx + blurSize; x ++）
{
for（y = yy; y< hp-> height&& y< yy + blurSize; y ++）
{
avgB + = data [x * 3 + y * hp - > width * 3 + 0];
avgG + = data [x * 3 + y * hp-> width * 3 + 1];
avgR + = data [x * 3 + y * hp-> width * 3 + 2];
ile ++;
}
}
avgB = avgB / ile;
avgG = avgG / ile;
avgR = avgR / ile;
data [xx * 3 + yy * hp-> width * 3 + 0] = avgB;
data [xx * 3 + yy * hp-> width * 3 + 1] = avgG;
data [xx * 3 + yy * hp-> width * 3 + 2] = avgR;
}
int filter（char * input，char * output）
{
//变量dec：
FILE * fp，
bitmap_header * hp;
bitmap_header * d_hp;
unsigned char * data;
unsigned char * d_data;
//打开输入文件：
fp = fopen（input，r）;
if（fp == NULL）
return 1;
//读取输入文件头：
hp =（bitmap_header *）malloc（sizeof（bitmap_header））;
cudaMalloc（& d_hp，（sizeof（bitmap_header））;
if（hp == NULL）
return 1;
fread（hp，sizeof ），1，fp）;
cudaMemcpy（d_hp，& hp，（sizeof（bitmap_header），cudaMemcpyHostToDevice）;
//读取映像数据：
data =（unsigned char *）malloc（sizeof（char）* hp-> bitmapsize）;
cudaMalloc（& d_data，（sizeof（char）* hp-> bitmapsize））;
fseek（fp，sizeof（char）* hp-> fileheader.dataoffset，SEEK_SET）;
fread（data，sizeof（char），hp-> bitmapsize，fp）;
cudaMemcpy d_data，& data，（sizeof（char）* hp-> bitmapsize），cudaMemcpyHostToDevice）;
dim3 block（16,16）;
dim3 grid hp-> height + 15）/ 16，（hp-> width + 15）/ 16）;
blur<<< grid，block>>（d_hp，d_data ）;
cudaMemcpy（data，d_data，（sizeof（char）* hp-> bitmapsize），cudaMemcpyDeviceToHost）;
//打开输出文件：
out = fopen输出wb）;
if（out == NULL）
{
fclose（fp）;
free（hp）;
free（data）;
cudaFree（d_data）;
cudaFree（d_hp）;
return 1;
}
fwrite（hp，sizeof（char），sizeof（bitmap_header），out）;
fseek（out，sizeof（char）* hp-> fileheader.dataoffset，SEEK_SET）;
fwrite（data，sizeof（char），hp-> bitmapsize，out）;
fclose（fp）;
fclose（out）;
free（hp）;
free（data）;
cudaFree（d_data）;
cudaFree（d_hp）;
return 0;
}
int main（int argc，char * argv []）
{
int frames;
int frame = 1;
char path [100000];
系统（rd / s / q temp）;
system（mkdir temp）;
system（cls）;
printf（Zapis wszystkich klatek do folderu temp.\）;
system（ffmpeg.exe -i test.mp4 -r 29.970 -vcodec bmp temp /％d.bmp）;
printf（Ile jest klatek w folderze temp？\\\
）;
scanf（％d，& frames）;
for（frame = 1; frame< = frames; frame ++）
{
sprintf（path，temp \\％d.bmp，frame）;
printf（Nakladam filtr na）;
printf（path）;
printf（\\\
）;
filter（path，path）;
}
system（cls）;
printf（Wszystkie klatki do filmu mp4.\\\
）;
system（ffmpeg -r 29.970 -i temp /％d.bmp -c：v libx264 -preset slow -crf 21 temp / out.mp4）;
system（cls）;
printf（Wyciecie dzwieku z filmu do mp3 \\\
）;
system（ffmpeg -i test.mp4 -vn -ar 44100 -ac 2 -ab 192 -f wav temp / sound.wav）;
system（cls）;
printf（Polaczenie mp3 z mp4.\\\
）;
system（ffmpeg -i temp / sound.wav -i temp / out.mp4 final.mp4）;
system（cls）;
printf（Delete）;
system（rd / s temp）;
system（pause）;
return 0;
}
错误清单：
警告1警告：compute_10和sm_10体系结构已弃用，可能会在将来的版本中删除。 C：\Users\Karpińscy\documents\visual studio 2012 \Projects\blur\blur\\\
vcc blur
错误2错误：标识符blockIdy未定义C：\Users\ Karpi˝scy\documents\visualstudio 2012\Projects\blur\blur\kernel.cu blur
错误3错误：预期a）C：\Users\Karpi˝scy\\ \\ documents \visual studio 2012 \Projects\blur\blur\kernel.cu blur
警告4警告：表达式没有效果C：\Users\Karpi˝scy\documents\visual studio 2012\Projects\blur\blur\kernel.cu blur
错误5错误：预期a）C：\Users\Karpi˝scy\documents\visualstudio 2012\ Projects \blur\blur\kernel.cu blur
错误6错误：函数调用中的参数太少C：\Users\Karpi˝scy\documents\visualstudio 2012\Projects\ blur\blur\kernel.cu blur
错误7错误MSB3721：命令C：\Program Files \ NVIDIA GPU计算工具包\CUDA \v6.0\bin\\\
vcc。 exe-gencode = arch = compute_10，code = \sm_10，compute_10 \--use-local-env --cl-version 2012 -ccbinC：\Program Files（x86）\ Microsoft Visual Studio 11.0 \VC\bin-IC：\Program文件\ NVIDIA GPU计算工具包\CUDA \v6.0 \include-IC：\Program Files \NVIDIA GPU计算工具包\CUDA\v6.0 \include-G -maxrregcount = 0 --machine 32 --compile -cudart static -I -g -DWIN32 -D_DEBUG -D_CONSOLE -D_MBCS -Xcompiler/ EHsc / W3 / nologo / Od / Zi / RTC1 / MDd-o Debug \kernel.cu.objC：\Users\Karpińscy\documents\visualstudio 2012\Projects\blur\blur\kernel.cu 退出与代码2. C：\Program Files（x86）\MSBuild\Microsoft.Cpp\v4.0\V110\BuildCustomizations\CUDA 6.0.targets 597 9 blur
8 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 33 1 blur
9 IntelliSense：expected a';'c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 33 12 blur
10 IntelliSense：这个声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 56 4 blur
11智能感知：预期a';'c： \Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 56 9 blur
12 IntelliSense：此声明没有存储类或类型说明符c：\\ \\ Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 57 4 blur
13智能感知：预期a';'c：\Users\Karpińscy \Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 57 7 blur
14 IntelliSense：预期声明c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 58 3 blur
15 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 62 2 blur
16 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\\ \\ Projects\blur\blur\kernel.cu 63 2 blur
17智能感知：标识符xx未定义c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\ blur\blur\kernel.cu 65 7 blur
18 IntelliSense：标识符yy未定义c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur \kernel.cu 65 14 blur
19 IntelliSense：标识符avgB未定义c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel。 cu 65 36 blur
20智能感知：标识符xx未定义c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 66 7 blur
21 IntelliSense：标识符yy未定义c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 66 14 blur
22智能感知：标识符xx未定义c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 67 7模糊
23智能感知：标识符yy未定义c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 67 14 blur
24 IntelliSense：预期声明c： \Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 68 1 blur
25 IntelliSense：此声明没有存储类或类型说明符c：\\ \\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 94 5 blur
26 IntelliSense：此声明没有存储类或类型说明符c：\ Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 95 2 blur
27智能感知：标识符d_data未定义c：\Users\Karpińscy \Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 95 15 blur
28 IntelliSense：expect a'）'c：\Users\Karpińscy\Documents\ Visual Studio 2012 \Projects\blur\blur\kernel.cu 95 21 blur
29 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 97 5 blur
30 IntelliSense：标识符fp未定义c：\Users\Karpińscy\Documents\VisualStudio 2012\ Projects \blur\blur\kernel.cu 97 11 blur
31 IntelliSense：expected a'）'c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\\ \\ blur\kernel.cu 97 13 blur
32 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\ blur\kernel.cu 98 5 blur
33 IntelliSense：expect a'）'c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel。 cu 98 15 blur
34 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 99 2 blur
35 IntelliSense：标识符d_data未定义c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 99 13 blur
36 IntelliSense：expect a'）'c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 99 19 blur
37智能感知：标识符dim3未定义c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 102 2 blur
38智能感知：预期' ）'c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 102 15 blur
39智能感知：标识符dim3未定义c： \Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 103 2 blur
40 IntelliSense：expected a'）'c：\Users\ Karpińscy\Documents\Visual Studio 2012 \Projects\blur\blur\kernel.cu 103 34 blur
41 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy \Documents\Visual Studio 2012 \Projects\blur\blur\kernel.cu 105 2 blur
42 IntelliSense：expect a';'c：\Users\Karpińscy\Documents\ Visual Studio 2012 \Projects\blur\blur\kernel.cu 105 6 blur
43 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\Visual Studio 2012 \Projects\blur\blur\kernel.cu 106 2 blur
44 IntelliSense：expect a'）'c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects \blur\blur\kernel.cu 106 17 blur
45 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\\ \\ blur \blur\kernel.cu 109 2 blur
46 IntelliSense：标识符输出未定义c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\ blur\kernel.cu 109 14 blur
47 IntelliSense：预期一个声明c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 110 2 blur
48 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 122 5 blur
49 IntelliSense：expect a'）'c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 122 14 blur
50 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 123 5 blur
51 IntelliSense：expect a'）'c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 123 16 blur
52 IntelliSense：这个声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 125 5 blur
53智能感知：标识符fp是未定义c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 125 12 blur
54 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 126 5 blur
55 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 127 5 blur
56 IntelliSense：这个声明没有存储类或类型说明符c ：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 128 5 blur
57 IntelliSense：此声明没有存储类或类型说明符c： \Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 130 2 blur
58 IntelliSense：标识符d_data未定义c：\Users\\ \\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 130 11 blur
59 IntelliSense：此声明没有存储类或类型说明符c：\Users\ Karpińscy\Documents\Visual Studio 2012 \Projects\blur\blur\kernel.cu 131 2 blur
60 IntelliSense：标识符d_hp未定义c：\Users\Karpińscy\Documents \Visual Studio 2012 \Projects\blur\blur\kernel.cu 131 11 blur
61 IntelliSense：预期声明c：\Users\Karpińscy\Documents\VisualStudio 2012\ Projects \blur\blur\kernel.cu 132 5 blur
62 IntelliSense：预期声明c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur \kernel.cu 133 1 blur
63 IntelliSense：预期声明c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 158 2 blur
64 IntelliSense：这个声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 161 2 blur
65 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 162 2 blur
66 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 164 2 blur
67 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 165 2 blur
68 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 166 2 blur
69 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 168 2 blur
70 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 169 2 blur
71 IntelliSense ：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 170 2 blur
72 IntelliSense：这个声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 172 2 blur
73 IntelliSense：this声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 173 2 blur
74 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 174 2 blur
75 IntelliSense：此声明没有存储类或类型说明符c：\Users\Karpińscy\Documents\VisualStudio 2012 \Projects\blur\blur\kernel.cu 175 2 blur
76 IntelliSense：预期声明c ：\Users\Karpińscy\Documents\VisualStudio 2012\Projects\blur\blur\kernel.cu 177 5 blur
77 IntelliSense：预期声明c：\Users\Karpińscy \Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 178 1 blur
解决方案
在你的代码中有很多语法错误。真的，他们没有任何与CUDA有关。也许你应该改进你的基本C编程技巧，并理解如何解释编译错误。
这一行：
cudaMalloc（& d_hp，（sizeof（bitmap_header））;
缺少一个右括号你不能看到，你也不能弄清楚编译错误，指示？
错误3错误：预期a）C：\Users\Karpi˝scy\documents\visual studio 2012 \Projects\blur\blur\kernel.cu blur
在cuda中，没有内置变量 blockIdy 。也许你的意思是 blockIdx.y ？
错误2错误： blockIdy未定义C：\Users\Karpi˝scy\documents\visualstudio 2012 \Projects\blur\blur\kernel.cu blur
此行上的另一个编译错误：
cudaMemcpy ，& hp，（sizeof（bitmap_header），cudaMemcpyHostToDevice）;
p>
cudaMemcpy（d_hp，& hp，sizeof（bitmap_header），cudaMemcpyHostToDevice）;/ pre>
如果在修复这些编译错误后仍需要帮助，请发布一个新问题，其中包含一个完整的但不是依赖的简单代码从文件读取图像只需创建一个简单的测试用例，并使用它来验证内核添加错误检查我提到和运行您的代码与
cuda-memcheck。拒绝做这些事情，我不能帮助你。I'm writing CUDA program that adds blur effect onto BMP files. I wrote working program that does this on CPU, now I'm trying to convert the code to CUDA. This is the function I want to work on CUDA:
void blur(bitmap_header* hp, unsigned char *data) { int xx,yy,x,y, avgB, avgG, avgR, ile; int blurSize = 5; for(xx = 0; xx < hp->width; xx++) { for(yy = 0; yy < hp->height; yy++) { avgB = avgG = avgR = 0; ile = 0; for(x = xx; x < hp->width && x < xx + blurSize; x++) { for(y = yy; y < hp->height && y < yy + blurSize; y++) { avgB += data[x*3 + y*hp->width*3 + 0]; avgG += data[x*3 + y*hp->width*3 + 1]; avgR += data[x*3 + y*hp->width*3 + 2]; ile++; } } avgB = avgB / ile; avgG = avgG / ile; avgR = avgR / ile; data[xx*3 + yy*hp->width*3 + 0] = avgB; data[xx*3 + yy*hp->width*3 + 1] = avgG; data[xx*3 + yy*hp->width*3 + 2] = avgR; } } }How do I convert this function to work on CUDA device? Every tutorial covers only one for loop and uses
int i = threadIdx.xMy previous question about this program: Blur effect on bitmap using C
EDIT
FULL CODE with CUDA edits:
#include <stdio.h> #include <stdlib.h> #include <Windows.h> #pragma pack(push,1) /* Windows 3.x bitmap file header */ typedef struct { char filetype[2]; /* magic - always 'B' 'M' */ unsigned int filesize; short reserved1; short reserved2; unsigned int dataoffset; /* offset in bytes to actual bitmap data */ } file_header; /* Windows 3.x bitmap full header, including file header */ typedef struct { file_header fileheader; unsigned int headersize; int width; int height; short planes; short bitsperpixel; /* we only support the value 24 here */ unsigned int compression; /* we do not support compression */ unsigned int bitmapsize; int horizontalres; int verticalres; unsigned int numcolors; unsigned int importantcolors; } bitmap_header; #pragma pack(pop) __global__ void blur(bitmap_header* hp, unsigned char *data) { int xx,yy,x,y, avgB, avgG, avgR, ile; int blurSize = 5; xx = blockIdy.y * blockDim.y + threadIdx.y; yy = blockIdx.x * blockDim.x + threadIdx.x; if(xx >= hp->width || yy >= hp->height) return; avgB = avgG = avgR = 0; ile = 0; for(x = xx; x < hp->width && x < xx + blurSize; x++) { for(y = yy; y < hp->height && y < yy + blurSize; y++) { avgB += data[x*3 + y*hp->width*3 + 0]; avgG += data[x*3 + y*hp->width*3 + 1]; avgR += data[x*3 + y*hp->width*3 + 2]; ile++; } } avgB = avgB / ile; avgG = avgG / ile; avgR = avgR / ile; data[xx*3 + yy*hp->width*3 + 0] = avgB; data[xx*3 + yy*hp->width*3 + 1] = avgG; data[xx*3 + yy*hp->width*3 + 2] = avgR; } int filter(char* input, char *output) { //variable dec: FILE *fp,*out; bitmap_header* hp; bitmap_header* d_hp; unsigned char *data; unsigned char *d_data; //Open input file: fp = fopen(input, "r"); if(fp==NULL) return 1; //Read the input file headers: hp=(bitmap_header*)malloc(sizeof(bitmap_header)); cudaMalloc( &d_hp, (sizeof(bitmap_header)); if(hp==NULL) return 1; fread(hp, sizeof(bitmap_header), 1, fp); cudaMemcpy(d_hp, &hp, (sizeof(bitmap_header), cudaMemcpyHostToDevice); //Read the data of the image: data = (unsigned char*)malloc(sizeof(char)*hp->bitmapsize); cudaMalloc( &d_data, (sizeof(char)*hp->bitmapsize)); fseek(fp,sizeof(char)*hp->fileheader.dataoffset,SEEK_SET); fread(data,sizeof(char),hp->bitmapsize, fp); cudaMemcpy(d_data, &data, (sizeof(char)*hp->bitmapsize), cudaMemcpyHostToDevice); dim3 block(16,16); dim3 grid ( (hp->height + 15)/16, (hp->width + 15)/16 ); blur<<<grid,block>>>(d_hp, d_data); cudaMemcpy(data, d_data, (sizeof(char)*hp->bitmapsize), cudaMemcpyDeviceToHost); //Open output file: out = fopen(output, "wb"); if(out==NULL) { fclose(fp); free(hp); free(data); cudaFree(d_data); cudaFree(d_hp); return 1; } fwrite(hp,sizeof(char),sizeof(bitmap_header),out); fseek(out,sizeof(char)*hp->fileheader.dataoffset,SEEK_SET); fwrite(data,sizeof(char),hp->bitmapsize,out); fclose(fp); fclose(out); free(hp); free(data); cudaFree(d_data); cudaFree(d_hp); return 0; } int main(int argc, char* argv[]) { int frames; int frame = 1; char path[100000]; system("rd /s/q temp"); system("mkdir temp"); system("cls"); printf("Zapis wszystkich klatek do folderu temp.\n"); system("ffmpeg.exe -i test.mp4 -r 29.970 -vcodec bmp temp/%d.bmp"); printf("Ile jest klatek w folderze temp?\n"); scanf("%d", &frames); for(frame = 1;frame<=frames;frame++) { sprintf(path,"temp\\%d.bmp",frame); printf("Nakladam filtr na "); printf(path); printf("\n"); filter(path,path); } system("cls"); printf("Wszystkie klatki do filmu mp4.\n"); system("ffmpeg -r 29.970 -i temp/%d.bmp -c:v libx264 -preset slow -crf 21 temp/out.mp4"); system("cls"); printf("Wyciecie dzwieku z filmu do mp3\n"); system("ffmpeg -i test.mp4 -vn -ar 44100 -ac 2 -ab 192 -f wav temp/sound.wav"); system("cls"); printf("Polaczenie mp3 z mp4.\n"); system("ffmpeg -i temp/sound.wav -i temp/out.mp4 final.mp4"); system("cls"); printf("Delete "); system("rd /s temp"); system("pause"); return 0; }FULL ERROR LIST:
Warning 1 warning : The 'compute_10' and 'sm_10' architectures are deprecated, and may be removed in a future release. C:\Users\Karpińscy\documents\visual studio 2012\Projects\blur\blur\nvcc blur Error 2 error : identifier "blockIdy" is undefined C:\Users\Karpi˝scy\documents\visual studio 2012\Projects\blur\blur\kernel.cu blur Error 3 error : expected a ")" C:\Users\Karpi˝scy\documents\visual studio 2012\Projects\blur\blur\kernel.cu blur Warning 4 warning : expression has no effect C:\Users\Karpi˝scy\documents\visual studio 2012\Projects\blur\blur\kernel.cu blur Error 5 error : expected a ")" C:\Users\Karpi˝scy\documents\visual studio 2012\Projects\blur\blur\kernel.cu blur Error 6 error : too few arguments in function call C:\Users\Karpi˝scy\documents\visual studio 2012\Projects\blur\blur\kernel.cu blur Error 7 error MSB3721: The command ""C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v6.0\bin\nvcc.exe" -gencode=arch=compute_10,code=\"sm_10,compute_10\" --use-local-env --cl-version 2012 -ccbin "C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin" -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v6.0\include" -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v6.0\include" -G -maxrregcount=0 --machine 32 --compile -cudart static -I -g -DWIN32 -D_DEBUG -D_CONSOLE -D_MBCS -Xcompiler "/EHsc /W3 /nologo /Od /Zi /RTC1 /MDd " -o Debug\kernel.cu.obj "C:\Users\Karpińscy\documents\visual studio 2012\Projects\blur\blur\kernel.cu"" exited with code 2. C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V110\BuildCustomizations\CUDA 6.0.targets 597 9 blur 8 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 33 1 blur 9 IntelliSense: expected a ';' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 33 12 blur 10 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 56 4 blur 11 IntelliSense: expected a ';' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 56 9 blur 12 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 57 4 blur 13 IntelliSense: expected a ';' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 57 7 blur 14 IntelliSense: expected a declaration c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 58 3 blur 15 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 62 2 blur 16 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 63 2 blur 17 IntelliSense: identifier "xx" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 65 7 blur 18 IntelliSense: identifier "yy" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 65 14 blur 19 IntelliSense: identifier "avgB" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 65 36 blur 20 IntelliSense: identifier "xx" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 66 7 blur 21 IntelliSense: identifier "yy" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 66 14 blur 22 IntelliSense: identifier "xx" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 67 7 blur 23 IntelliSense: identifier "yy" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 67 14 blur 24 IntelliSense: expected a declaration c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 68 1 blur 25 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 94 5 blur 26 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 95 2 blur 27 IntelliSense: identifier "d_data" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 95 15 blur 28 IntelliSense: expected a ')' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 95 21 blur 29 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 97 5 blur 30 IntelliSense: identifier "fp" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 97 11 blur 31 IntelliSense: expected a ')' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 97 13 blur 32 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 98 5 blur 33 IntelliSense: expected a ')' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 98 15 blur 34 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 99 2 blur 35 IntelliSense: identifier "d_data" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 99 13 blur 36 IntelliSense: expected a ')' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 99 19 blur 37 IntelliSense: identifier "dim3" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 102 2 blur 38 IntelliSense: expected a ')' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 102 15 blur 39 IntelliSense: identifier "dim3" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 103 2 blur 40 IntelliSense: expected a ')' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 103 34 blur 41 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 105 2 blur 42 IntelliSense: expected a ';' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 105 6 blur 43 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 106 2 blur 44 IntelliSense: expected a ')' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 106 17 blur 45 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 109 2 blur 46 IntelliSense: identifier "output" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 109 14 blur 47 IntelliSense: expected a declaration c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 110 2 blur 48 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 122 5 blur 49 IntelliSense: expected a ')' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 122 14 blur 50 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 123 5 blur 51 IntelliSense: expected a ')' c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 123 16 blur 52 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 125 5 blur 53 IntelliSense: identifier "fp" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 125 12 blur 54 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 126 5 blur 55 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 127 5 blur 56 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 128 5 blur 57 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 130 2 blur 58 IntelliSense: identifier "d_data" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 130 11 blur 59 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 131 2 blur 60 IntelliSense: identifier "d_hp" is undefined c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 131 11 blur 61 IntelliSense: expected a declaration c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 132 5 blur 62 IntelliSense: expected a declaration c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 133 1 blur 63 IntelliSense: expected a declaration c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 158 2 blur 64 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 161 2 blur 65 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 162 2 blur 66 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 164 2 blur 67 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 165 2 blur 68 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 166 2 blur 69 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 168 2 blur 70 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 169 2 blur 71 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 170 2 blur 72 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 172 2 blur 73 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 173 2 blur 74 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 174 2 blur 75 IntelliSense: this declaration has no storage class or type specifier c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 175 2 blur 76 IntelliSense: expected a declaration c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 177 5 blur 77 IntelliSense: expected a declaration c:\Users\Karpińscy\Documents\Visual Studio 2012\Projects\blur\blur\kernel.cu 178 1 blur
解决方案There are quite a few syntax errors in your code. Really they don't have anything to do with CUDA. Perhaps you should improve your basic C coding skills and understanding how to interpret compiler errors.
This line:
cudaMalloc( &d_hp, (sizeof(bitmap_header));is missing a close parenthesis. You can't see that, and you also can't figure out the compiler error that indicates that?
Error 3 error : expected a ")" C:\Users\Karpi˝scy\documents\visual studio 2012\Projects\blur\blur\kernel.cu blurIn cuda, there is no built-in variable
blockIdy. Perhaps you meantblockIdx.y?Error 2 error : identifier "blockIdy" is undefined C:\Users\Karpi˝scy\documents\visual studio 2012\Projects\blur\blur\kernel.cu blurAnother compile error on this line:
cudaMemcpy(d_hp, &hp, (sizeof(bitmap_header), cudaMemcpyHostToDevice);It should be this:
cudaMemcpy(d_hp, &hp, sizeof(bitmap_header), cudaMemcpyHostToDevice);If you still need help after fixing those compile errors, post a new question with a complete but simple code that doesn't depend on reading images from files. Just create a simple test case and use that to validate the kernel. Add the error checking I mentioned and run your code with
cuda-memcheck. If you refuse to do those things, I can't help you.这篇关于将四个嵌套循环转换为CUDA内核的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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