#ifndef _FFMPEG_FORMAT_CONTEXT_IN_H_
#define _FFMPEG_FORMAT_CONTEXT_IN_H_

#include <stdint.h>
#include <memory>

struct AVFormatContext;
struct AVDictionary;
struct AVStream;
struct AVCodecContext;
struct AVPacket;
struct AVFrame;
struct AVCodec;
struct AVIOContext;

typedef int(* read_packet)(void *opaque,uint8_t *buf, int buf_size);

namespace ffwrapper{

	class VideoProp;
	class CodedData;
	class FrameData;

	class FormatIn
	{
	public:
		explicit FormatIn(bool hw=true);
		~FormatIn();
		
	public:
		int openWithCustomIO(void *opaque, read_packet fn, AVDictionary **options=NULL);
        int openGb28181(const char *filename, AVDictionary **options);

		int open(const char *filename, AVDictionary **options);
		bool findStreamInfo(AVDictionary **options);

		bool openCodec(const int type, AVDictionary **options);
		
		bool readPacket(AVPacket &pkt_out, int stream_index = 0);
		bool readPacket(std::shared_ptr<CodedData> &data, int stream_index = 0);

		int decode(AVFrame* &frame, AVPacket &pkt);
		int decode(std::shared_ptr<FrameData> &frame_data,
					std::shared_ptr<CodedData> &data);
		
		int readFrame(AVFrame* &frame);
		int readFrame(std::shared_ptr<FrameData> &frame_data);

	private:
		bool allocCodec(AVCodec *dec, AVStream *s, AVDictionary **options);
	public:
		AVStream *getStream(int type = 0);
		AVCodecContext *getCodecContext(int type = 0);
	private:
	 	AVFormatContext 	*ctx_;
	 	AVCodecContext 		*dec_ctx_;
	 	int 				vs_idx_;

	 	bool 				hw_accl_;

	private:
		AVIOContext			*io_ctx_;
		uint8_t 			*read_io_buff_;
		const int 			read_io_buff_size_;
	};
}

#endif