/********************************************************

	Video encoder interface
	Copyright 2000 Eugene Kuznetsov  (divx@euro.ru)

*********************************************************/
#ifndef _videoencoder_h
#define _videoencoder_h


#include <vector>
#include <string>
#include <map>

#include <default.h>
#include <except.h>

#include <image.h>
#include <infotypes.h>
//#include <stdio.h>
#include <math.h>
/**
 *
 *    Video encoder class.
 *
 *  Usage ( preliminary info ):
 *	
 *   Create encoder object. Call Init(), optionally
 * set quality and key-frame frequency. Call Start().
 * Call QueryOutputSize() to identify maximum possible
 * size of compressed frame. Allocate buffer of this size.
 * Pass it as 'dest' in calls to EncodeFrame(). At the end
 * call Stop().
 *
 *  Some codec DLLs have be controlled by special codec-specific
 * parameters. In Windows you can set them from codec configuration 
 * dialog, but since we are completely GUI-independent, we'll need
 * an internal method to set them. Currently it is done by calling
 * static func SetExtendedAttr(), which takes FOURCC of codec, 
 * name of parameter and its integer value. Complete list of
 * supported attributes can be found in source of function
 * SetExtendedAttr() ;-) This func should be called before Init()
 * because values for these attributes are typically stored in 
 * registry and read by codec during object creation.
 *
 *  The complete scheme looks extremely ugly, but it is in very alpha.
 * This class was actually written in half an hour at the very beginning
 * of Avifile and almost didn't change since then. Some day I'll
 * return here and fix everything.
 *
 */
class IVideoEncoder
{
public:
    static IVideoEncoder* Create(int compressor, const BITMAPINFOHEADER& bh);
    static IVideoEncoder* Create(const VideoEncoderInfo& info);

    virtual void Close() =0;
    virtual void Start() =0;
    virtual void Stop() =0;
    virtual int QueryOutputSize() =0;
    virtual const BITMAPINFOHEADER& QueryOutputFormat() const
 =0;
    virtual int EncodeFrame(CImage* src, char* dest, int* is_keyframe, int* size, int* lpckid=0) =0;
    virtual int SetQuality(int quality) =0;
    virtual int GetQuality() =0;
    virtual int SetKeyFrame(int frequency) =0;
    virtual int GetKeyFrame() =0;
    
    static int GetExtendedAttr(int comp_id, const char* attribute, int &value);
    static int GetExtendedAttr(int comp_id, const char* attribute, char* value, int size)
;
    static int SetExtendedAttr(int comp_id, const char* attribute, int value)
;
    static int SetExtendedAttr(int comp_id, const char* attribute, const char* value)
;
    static int SetRegValue(int fccHandler, const char* name, int value)
;
    static int GetRegValue(int fccHandler, const char* name, int* place)
;
    
    virtual const CodecInfo& GetCodecInfo() const =0;
};    

extern std::vector<CodecInfo> video_codecs;

extern std::map<int, std::vector<AttributeInfo> > video_attributes;

#endif