ccap-rs 1.6.0

Rust bindings for ccap — high-performance, cross-platform webcam/camera capture with hardware-accelerated pixel format conversion (DirectShow/AVFoundation/V4L2), including common RGB/YUV workflows and video file input/playback support
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//
// Created by wysaid on 2025/5/19.
//

#ifndef __cplusplus
#error "ccap_opencv.h is for C++ only. For C language, please use ccap_c.h instead."
#endif

#pragma once
#ifndef CCAP_OPENCV_H
#define CCAP_OPENCV_H

#include "ccap_core.h"

#include <memory>
#include <opencv2/core.hpp>

/// header only, to convert ccap::Frame to cv::Mat

namespace ccap
{
/**
 * @brief Converts a Frame in RGB/BGR/RGBA/BGRA image format to cv::Mat. Does not change channel order and does not support YUV format.
 * @param frame
 * @param mat
 * @note Note: This function does not copy data. The lifetime of the Frame must be maintained.
 */
inline cv::Mat convertRgbFrameToMat(const VideoFrame& frame)
{
    if (!((uint32_t)frame.pixelFormat & (uint32_t)kPixelFormatRGBColorBit))
    {
        return {};
    }

    auto typeEnum = (uint32_t)frame.pixelFormat & (uint32_t)kPixelFormatAlphaColorBit ? CV_8UC4 : CV_8UC3;
    return cv::Mat(frame.height, frame.width, typeEnum, frame.data[0], frame.stride[0]);
}
} // namespace ccap

#endif // CCAP_OPENCV_H