/*
 * Copyright (c) 2023 Fancy Code.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef FFMPEG_THUMBNAIL_H
#define FFMPEG_THUMBNAIL_H
#include "FfmpegDecoder.h"
#include "FfmpegEncoder.h"
#ifdef __cplusplus
extern "C" {
#endif
#include <libavcodec/avcodec.h>
#include <libavcodec/packet.h>
#include <libavformat/avformat.h>
#include <libavutil/avassert.h>
#include <libavutil/avutil.h>
#include <libavutil/channel_layout.h>
#include <libavutil/imgutils.h>
#include <libavutil/mathematics.h>
#include <libavutil/opt.h>
#include <libavutil/timestamp.h>
#include <libswresample/swresample.h>
#include <libswscale/swscale.h>
#ifdef __cplusplus
}
#endif
#include <functional>
#include <memory>
typedef struct thumbnail_info
{
    thumbnail_info(const int &srouceWidth, const int &srouceHeight, const int &targetWidth, const int &targetHeight);
    const int mSrouceWidth;
    const int mSrouceHeight;
    const int mTargetWidth;
    const int mTargetHeight;
} ThumbnailInfo;
class FfmpegThumbnail
{
public:
    FfmpegThumbnail(const AVCodecID &encodecId, const AVCodecID &decodecId);
    virtual ~FfmpegThumbnail() = default;
    void Init(const ThumbnailInfo &thumbnailInfo);
    void UnInit(void);
    bool CreateThumbnail(const std::string &outputFile, const void *data, const size_t &size);

private:
    void GetDecodeDataCallback(AVFrame *frame);
    void GetEncodeDataCallback(AVPacket *pkt, const std::string &fileName);

protected:
    virtual void EncodeDataToPicture(AVFrame *frame);

protected:
    static bool SavePicture(const std::string &fileName, const void *data, const size_t &size);

private:
    std::shared_ptr<FfmpegEncoder> mEncoder;
    std::shared_ptr<FfmpegDecoder> mDecoder;
    std::function<void(AVFrame *)> mDecodeCallback;
    std::function<void(AVPacket *)> mEncodeCallback;

protected:
    AVFormatContext *mOutputFormat;
    AVStream *mStream;
    struct SwsContext *mSwsCtx;
    int mSrouceWidth;
    int mSrouceHeight;
    int mTargetWidth;
    int mTargetHeight;
    const AVCodecID mEncodecId;
    const AVCodecID mDecodecId;
};
#endif