/*
 * 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_OUTPUT_STREAM_H
#define FFMPEG_OUTPUT_STREAM_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>
#include <thread>
class FfmpegOutputStream : public std::enable_shared_from_this<FfmpegOutputStream>
{
public:
    FfmpegOutputStream(const AVCodecID &encodecId, const AVCodecID &dncodecId);
    virtual ~FfmpegOutputStream() = default;
    bool Init(AVFormatContext *outputFormat);
    /**
     * @brief If you need to convert stream frames into thumbnails, use this function.
     * @param outputFormat
     * @param thumbnailFile
     * @return true
     * @return false
     */
    bool Init(AVFormatContext *outputFormat, const std::string &thumbnailFile);
    void UnInit(void);
    void WriteSourceData(const void *data, const size_t &size, const unsigned long long &pts);
    void SetWriteSourceDataCallback(std::function<void(AVPacket *pkt)> callback);
    bool CheckStreamHeader(const void *data, const size_t &size);

private:
    void GetDecodeDataCallback(AVFrame *frame);
    /**
     * @brief Create a thumbnail for the wrapped video.
     * @param frame
     * @param size
     */
    void CreateThumbnailFile(const void *frame, const size_t &size);
    void CreateThumbnailFileThread(const void *frame, const size_t &size);

private:
    const AVCodecID mEncodecId;
    const AVCodecID mDeccodecId;
    AVPacket *mTmpPkt;
    std::shared_ptr<FfmpegEncoder> mEncoder;
    std::shared_ptr<FfmpegDecoder> mDecoder;
    AVStream *mStream;
    std::function<void(AVFrame *)> mDecodeCallback;
    std::function<void(AVPacket *)> mEncodeCallback;
    bool mStreamHeaderWritten;
    std::thread mThumbnailThread;
    char *mH264Data2Jpeg;
    std::string mThumbnailFileName;
};
#endif