EzPlayer/imagescaler.h at master · openff/EzPlayer · GitHub

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#ifndef IMAGESCALER_H
#define IMAGESCALER_H
#include "ijkmediaplayer.h"
#include"mediabase.h"
#include "easylogging++.h"


/// @brief 用于图像缩放的工具
class ImageScaler
{
public:
    ImageScaler();
    ~ImageScaler();
    /// @brief 设置源和目标的图像参数,并创建一个 SwsContext 对象
    /// @param src_width
    /// @param src_height
    /// @param src_pix_fmt
    /// @param dst_width
    /// @param dst_height
    /// @param dst_pix_fmt
    /// @param en_alogrithm
    /// @return
    RET_CODE Init(uint32_t src_width, uint32_t src_height, int src_pix_fmt,
                  uint32_t dst_width, uint32_t dst_height, int dst_pix_fmt,
                  SwsAlogrithm en_alogrithm = SwsAlogrithm::SWS_SA_FAST_BILINEAR);
    void DeInit( ) {
        if(sws_ctx_) {
            sws_freeContext(sws_ctx_);
            sws_ctx_ = NULL;
        }
    }

    //图像缩放
    RET_CODE Scale(const AVFrame *src_frame, AVFrame *dst_frame);
    RET_CODE Scale2(const VideoFrame *src_frame, VideoFrame *dst_frame) ;
    RET_CODE Scale3(const Frame *src_frame, VideoFrame *dst_frame);
private:

    SwsContext*	sws_ctx_;               //SWS对象
    AVPixelFormat src_pix_fmt_;			//源像素格式
    AVPixelFormat dst_pix_fmt_;			//目标像素格式
    SwsAlogrithm en_alogrithm_ = SwsAlogrithm::SWS_SA_POINT;		//Resize算法

    int src_width_, src_height_;			//源图像宽高

    int dst_width_, dst_height_;			//目标图像宽高

};

#endif // IMAGESCALER_H