VideoResampler.h

/*******************************************************************************
 * Copyright (c) 2024, 2026, Olivier Ayache.  All rights reserved.
 *
 * This file is part of AVPKit.
 *
 * AVPKit is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AVPKit is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with AVPKit.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
 
#ifndef VIDEORESAMPLER_H_
#define VIDEORESAMPLER_H_
 
#include <com/avpkit/core/IVideoResampler.h>
 
 
/*
 * Do not include anything from the swscale library here.
 * 
 * We're just keeping an opaque pointer here.
 */
struct SwsContext;
 
namespace com { namespace avpkit { namespace core
  {
 
  class VideoResampler : public IVideoResampler
  {
  private:
    VS_JNIUTILS_REFCOUNTED_OBJECT_PRIVATE_MAKE(VideoResampler)
  public:
    virtual int32_t getInputWidth();
    virtual int32_t getInputHeight();
    virtual IPixelFormat::Type getInputPixelFormat();
    
    virtual int32_t getOutputWidth();
    virtual int32_t getOutputHeight();
    virtual IPixelFormat::Type getOutputPixelFormat();
    
    virtual int32_t resample(IVideoPicture *pOutFrame, IVideoPicture *pInFrame);
    
    /*
     * Added for 1.19
     */
    virtual int32_t getNumProperties();
    virtual IProperty* getPropertyMetaData(int32_t propertyNo);
    virtual IProperty* getPropertyMetaData(const char *name);
 
    virtual int32_t setProperty(const char* name, const char* value);
    virtual int32_t setProperty(const char* name, double value);
    virtual int32_t setProperty(const char* name, int64_t value);
    virtual int32_t setProperty(const char* name, bool value);
    virtual int32_t setProperty(const char* name, IRational *value);
    
    virtual char * getPropertyAsString(const char* name);
    virtual double getPropertyAsDouble(const char* name);
    virtual int64_t getPropertyAsLong(const char* name);
    virtual  IRational *getPropertyAsRational(const char* name);
    virtual bool getPropertyAsBoolean(const char* name);
 
    static VideoResampler* make(
        int32_t outputWidth, int32_t outputHeight,
        IPixelFormat::Type outputFmt,
        int32_t inputWidth, int32_t inputHeight,
        IPixelFormat::Type inputFmt);
    virtual int32_t setProperty(IMetaData* valuesToSet, IMetaData* valuesNotFound);
  protected:
    VideoResampler();
    virtual ~VideoResampler();
  private:
    int32_t mIHeight;
    int32_t mIWidth;
    int32_t mOHeight;
    int32_t mOWidth;
    IPixelFormat::Type mIPixelFmt;
    IPixelFormat::Type mOPixelFmt;
    
    SwsContext* mContext;
  };
 
  }}}
 
#endif /*VIDEORESAMPLER_H_*/