René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"内存泄漏","articleBody":"不知道为什么，把下面函数返回的 unsigned char* 值给cv::Mat之后会导致内存泄漏\r\n```\r\nunsigned char* JpegCoderImage::buffer() {\r\n\tnvjpegImage_t* img = ((nvjpegImage_t*)(this-\u003eimg));\r\n\tsize_t size = height * width * 3;\r\n\tunsigned char* buffer = (unsigned char*)malloc(size);\r\n\tcudaMemcpy(buffer, img-\u003echannel[0], size, cudaMemcpyDeviceToHost);\r\n\r\n\treturn buffer;\r\n}\r\n```\r\n```\r\nJpegCoderImage* jpgImage = decode((const unsigned char *)(pchData.data()), file_size);\r\n\r\nimg = cv::Mat(jpgImage-\u003eheight, jpgImage-\u003ewidth, CV_8UC3, jpgImage-\u003ebuffer());\r\n\r\ndelete jpgImage;\r\n```\r\n\r\n好像是 buffer 导致内存无法释放？\r\n\r\n我现在的做法是：\r\n```\r\nunsigned char* JpegCoderImage::buffer() {\r\n\tnvjpegImage_t* img = ((nvjpegImage_t*)(this-\u003eimg));\r\n\t//size_t size = height * width * 3;\r\n\t//unsigned char* buffer = (unsigned char*)malloc(size);\r\n\t//cudaMemcpy(buffer, img-\u003echannel[0], size, cudaMemcpyDeviceToHost);\r\n\r\n\treturn img-\u003echannel[0];\r\n}\r\n```\r\n```\r\nJpegCoderImage* jpgImage = decode((const unsigned char *)(pchData.data()), file_size);\r\n\r\nimg = cv::Mat(jpgImage-\u003eheight, jpgImage-\u003ewidth, CV_8UC3);\r\n\r\ncudaMemcpy(img.data, jpgImage-\u003ebuffer(), jpgImage-\u003eheight * jpgImage-\u003ewidth * 3, cudaMemcpyDeviceToHost);\r\n\r\ndelete jpgImage;\r\n```\r\n\r\n","author":{"url":"https://github.com/ZhangYich","@type":"Person","name":"ZhangYich"},"datePublished":"2024-05-11T08:08:24.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/23/nvjpeg-python/issues/23"}