Question

我尝试使用以下代码来检查英特尔IPP用于调整图像大小/转换图像的速度，但最后它仍然在ippsFree（pSpec）上崩溃，我无法弄清楚，为什么。

#include <stdint.h>
#include <memory>
#include <Windows.h>
#include <time.h>

#include "ipp.h"

int main(...) {
    srand(time(NULL));

    int width = 640;
    int height = 480;
    int channels = 2;
    IppiResizeYUV422Spec* pSpec;
    IppiSize dstSize, srcSize;
    IppiPoint dstOffset = { 0, 0 };
    srcSize.width = width;
    srcSize.height = height;
    dstSize.width = 2 * width;
    dstSize.height = 2 * height;
    std::unique_ptr<unsigned char[]> sourceData;
    std::unique_ptr<unsigned char[]> destinationData;
    std::unique_ptr<unsigned char[]> destinationDataRGB;
    std::unique_ptr<unsigned char[]> workBuffer;

    sourceData.reset(new unsigned char[srcSize.width * srcSize.height * channels]);
    destinationData.reset(new unsigned char[dstSize.width * dstSize.height * channels]);
    destinationDataRGB.reset(new unsigned char[dstSize.width * dstSize.height * 3]);
    workBuffer.reset(new unsigned char[dstSize.width * dstSize.height * channels]);

    memset(sourceData.get(), 0, srcSize.width * srcSize.height * channels);
    memset(destinationData.get(), 0, dstSize.width * dstSize.height * channels);
    memset(workBuffer.get(), 0, dstSize.width * dstSize.height * channels);

    IppStatus error;
    int specSize = 0, initSize = 0, buffSize = 0;
    error = ippiResizeGetSize_8u(srcSize, dstSize, IppiInterpolationType::ippNearest, 0, &specSize, &initSize);

    pSpec = (IppiResizeYUV422Spec*) ippsMalloc_8u(specSize);
    error = ippiResizeYUV422NearestInit(srcSize, dstSize, pSpec);

    IppiRect srcRoi = { 0, 0, srcSize.width, srcSize.height };

    int64_t timerIPP9 = 0;
    LARGE_INTEGER start, end;
    LARGE_INTEGER tps;
    QueryPerformanceFrequency(&tps);

    for (unsigned int index = 0; index < 100; ++index) {
        for (unsigned int imageIdx = 0; imageIdx < srcSize.width * srcSize.height * channels; ++imageIdx) {
            sourceData.get()[imageIdx] = (rand() & 0xFF);
        }

        QueryPerformanceCounter(&start);
        error = ippiResizeYUV422Nearest_8u_C2R(
            sourceData.get(),
            srcSize.width * channels,
            destinationData.get(),
            dstSize.width * channels,
            dstOffset,
            dstSize,
            pSpec,
            workBuffer.get());
        QueryPerformanceCounter(&end);

        timerIPP9 += end.QuadPart - start.QuadPart;

        QueryPerformanceCounter(&start);
        ippiYCbCr422ToRGB_8u_C2C3R(destinationData.get(), dstSize.width * channels, destinationDataRGB.get(), dstSize.width * 3, dstSize);
        QueryPerformanceCounter(&end);

        timerIPP9 += end.QuadPart - start.QuadPart;
        printf("Test: %d, time: %d ms\r", index, timerIPP9 * 1000 / tps.QuadPart);
    }

    ippsFree(pSpec);
    printf("\n");
    printf("Time taken: %d ms\n", timerIPP9 * 1000 / tps.QuadPart);
    system("Pause");
    return 0;
}

我只是将随机数据传输到转换器中，但它应该能够处理噪声（因为它仍然是有效的图像）。

Answer 1

我想我解开了这个难题......

您需要做的就是替换以下代码：

error = ippiResizeGetSize_8u(srcSize, dstSize, IppiInterpolationType::ippNearest, 0, &specSize, &initSize);

使用以下内容：

error = ippiResizeYUV422GetSize(srcSize, dstSize, IppiInterpolationType::ippNearest, 0, &specSize, &initSize);

根据IPP文件：

描述   此函数使用最近邻插值方法初始化调整大小算法的IppiResizeYUV422Spec结构。
  要计算spec结构对象的大小，请调用ippiResizeYUV422GetSize函数。

请参阅：http://hpc.ipp.ac.cn/wp-content/uploads/2015/12/documentation_2016/en/ipp/common/ipp_manual/GUID-15B51AB0-7F73-4E13-AC81-753259CE0E2C.htm

执行ippiResizeYUV422GetSize时，specSize的值等于11776 执行ippiResizeGetSize_8u时，specSize的值等于9240 分配的较小的大小会导致堆损坏。

英特尔IPP ippsFree（）崩溃

1 个答案: