#ifndef KITDECODER_H
#define KITDECODER_H

#include <stdbool.h>

#include <SDL2/SDL_mutex.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>

#include "kitchensink/kitconfig.h"
#include "kitchensink/kitsource.h"
#include "kitchensink/internal/kitbuffer.h"

#define KIT_DEC_IN 0
#define KIT_DEC_OUT 1

typedef struct Kit_Decoder Kit_Decoder;

typedef int (*dec_decode_cb)(Kit_Decoder *dec, AVPacket *in_packet);
typedef void (*dec_close_cb)(Kit_Decoder *dec);
typedef void (*dec_free_packet_cb)(void *packet);

KIT_LOCAL struct Kit_Decoder {
    int stream_index;            ///< Source stream index for the current stream
    double clock_sync;           ///< Sync source for current stream
    double clock_pos;            ///< Current pts for the stream

    AVCodecContext *codec_ctx;   ///< FFMpeg internal: Codec context
    AVFormatContext *format_ctx; ///< FFMpeg internal: Format context (owner: Kit_Source)

    SDL_mutex *lock[2];          ///< Threading locks for input and output buffers
    Kit_Buffer *buffer[2];       ///< Buffers for incoming and decoded packets

    void *userdata;              ///< Decoder specific information (Audio, video, subtitle context)
    dec_decode_cb dec_decode;    ///< Decoder decoding function callback
    dec_close_cb dec_close;      ///< Decoder close function callback
};

KIT_LOCAL Kit_Decoder* Kit_CreateDecoder(const Kit_Source *src, int stream_index,
                                         int in_b_size, int out_b_size,
                                         dec_free_packet_cb free_out_cb);
KIT_LOCAL void Kit_SetDecoderClockSync(Kit_Decoder *dec, double sync);
KIT_LOCAL void Kit_ChangeDecoderClockSync(Kit_Decoder *dec, double sync);
KIT_LOCAL bool Kit_CanWriteDecoderInput(Kit_Decoder *dec);
KIT_LOCAL int Kit_WriteDecoderInput(Kit_Decoder *dec, AVPacket *packet);
KIT_LOCAL AVPacket* Kit_ReadDecoderInput(Kit_Decoder *dec);
KIT_LOCAL int Kit_WriteDecoderOutput(Kit_Decoder *dec, void *packet);
KIT_LOCAL void* Kit_PeekDecoderOutput(Kit_Decoder *dec);
KIT_LOCAL void Kit_AdvanceDecoderOutput(Kit_Decoder *dec);
KIT_LOCAL void Kit_ClearDecoderBuffers(Kit_Decoder *dec);
KIT_LOCAL int Kit_RunDecoder(Kit_Decoder *dec);
KIT_LOCAL void Kit_CloseDecoder(Kit_Decoder *dec);

#endif // KITDECODER_H