avisynth.h

the De-interlace video processing developed with C++ enviroment in Motion adaptive in 3D and Bi-indi

  }

  BYTE* GetWritePtr(int plane) const {
    if (plane==PLANAR_Y) {
      if (vfb->GetRefcount()>1) {
        _ASSERT(FALSE);
//        throw AvisynthError("Internal Error - refcount was more than one!");
      }
      return IsWritable() ? vfb->GetWritePtr() + GetOffset(plane) : 0;
    }
    return vfb->data + GetOffset(plane);
  }

  ~VideoFrame() { InterlockedDecrement(&vfb->refcount); }
};

enum {
  CACHE_NOTHING=0,
  CACHE_RANGE=1,
  CACHE_ALL=2,
  CACHE_AUDIO=3,
  CACHE_AUDIO_NONE=4
 };

// Base class for all filters.
class IClip {
  friend class PClip;
  friend class AVSValue;
  int refcnt;
  void AddRef() { InterlockedIncrement((long *)&refcnt); }
  void Release() { InterlockedDecrement((long *)&refcnt); if (!refcnt) delete this; }
public:
  IClip() : refcnt(0) {}

  virtual int __stdcall GetVersion() { return AVISYNTH_INTERFACE_VERSION; }
  
  virtual PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* env) = 0;
  virtual bool __stdcall GetParity(int n) = 0;  // return field parity if field_based, else parity of first field in frame
  virtual void __stdcall GetAudio(void* buf, __int64 start, __int64 count, IScriptEnvironment* env) = 0;  // start and count are in samples
  virtual void __stdcall SetCacheHints(int cachehints,int frame_range) = 0 ;  // We do not pass cache requests upwards, only to the next filter.
  virtual const VideoInfo& __stdcall GetVideoInfo() = 0;
  virtual __stdcall ~IClip() {}
};


// smart pointer to IClip
class PClip {

  IClip* p;

  IClip* GetPointerWithAddRef() const { if (p) p->AddRef(); return p; }
  friend class AVSValue;
  friend class VideoFrame;

  void Init(IClip* x) {
    if (x) x->AddRef();
    p=x;
  }
  void Set(IClip* x) {
    if (x) x->AddRef();
    if (p) p->Release();
    p=x;
  }

public:
  PClip() { p = 0; }
  PClip(const PClip& x) { Init(x.p); }
  PClip(IClip* x) { Init(x); }
  void operator=(IClip* x) { Set(x); }
  void operator=(const PClip& x) { Set(x.p); }

  IClip* operator->() const { return p; }

  // useful in conditional expressions
  operator void*() const { return p; }
  bool operator!() const { return !p; }

  ~PClip() { if (p) p->Release(); }
};


// smart pointer to VideoFrame
class PVideoFrame {

  VideoFrame* p;

  void Init(VideoFrame* x) {
    if (x) x->AddRef();
    p=x;
  }
  void Set(VideoFrame* x) {
    if (x) x->AddRef();
    if (p) p->Release();
    p=x;
  }

public:
  PVideoFrame() { p = 0; }
  PVideoFrame(const PVideoFrame& x) { Init(x.p); }
  PVideoFrame(VideoFrame* x) { Init(x); }
  void operator=(VideoFrame* x) { Set(x); }
  void operator=(const PVideoFrame& x) { Set(x.p); }

  VideoFrame* operator->() const { return p; }

  // for conditional expressions
  operator void*() const { return p; }
  bool operator!() const { return !p; }

  ~PVideoFrame() { if (p) p->Release();}
};


class AVSValue {
public:

  AVSValue() { type = 'v'; }
  AVSValue(IClip* c) { type = 'c'; clip = c; if (c) c->AddRef(); }
  AVSValue(const PClip& c) { type = 'c'; clip = c.GetPointerWithAddRef(); }
  AVSValue(bool b) { type = 'b'; boolean = b; }
  AVSValue(int i) { type = 'i'; integer = i; }
//  AVSValue(__int64 l) { type = 'l'; longlong = l; }
  AVSValue(float f) { type = 'f'; floating_pt = f; }
  AVSValue(double f) { type = 'f'; floating_pt = float(f); }
  AVSValue(const char* s) { type = 's'; string = s; }
  AVSValue(const AVSValue* a, int size) { type = 'a'; array = a; array_size = size; }
  AVSValue(const AVSValue& v) { Assign(&v, true); }

  ~AVSValue() { if (IsClip() && clip) clip->Release(); }
  AVSValue& operator=(const AVSValue& v) { Assign(&v, false); return *this; }

  // Note that we transparently allow 'int' to be treated as 'float'.
  // There are no int<->bool conversions, though.

  bool Defined() const { return type != 'v'; }
  bool IsClip() const { return type == 'c'; }
  bool IsBool() const { return type == 'b'; }
  bool IsInt() const { return type == 'i'; }
//  bool IsLong() const { return (type == 'l'|| type == 'i'); }
  bool IsFloat() const { return type == 'f' || type == 'i'; }
  bool IsString() const { return type == 's'; }
  bool IsArray() const { return type == 'a'; }

  PClip AsClip() const { _ASSERTE(IsClip()); return IsClip()?clip:0; }
  bool AsBool() const { _ASSERTE(IsBool()); return boolean; }
  int AsInt() const { _ASSERTE(IsInt()); return integer; }   
//  int AsLong() const { _ASSERTE(IsLong()); return longlong; } 
  const char* AsString() const { _ASSERTE(IsString()); return IsString()?string:0; }
  double AsFloat() const { _ASSERTE(IsFloat()); return IsInt()?integer:floating_pt; }

  bool AsBool(bool def) const { _ASSERTE(IsBool()||!Defined()); return IsBool() ? boolean : def; }
  int AsInt(int def) const { _ASSERTE(IsInt()||!Defined()); return IsInt() ? integer : def; }
  double AsFloat(double def) const { _ASSERTE(IsFloat()||!Defined()); return IsInt() ? integer : type=='f' ? floating_pt : def; }
  const char* AsString(const char* def) const { _ASSERTE(IsString()||!Defined()); return IsString() ? string : def; }

  int ArraySize() const { _ASSERTE(IsArray()); return IsArray()?array_size:1; }

  const AVSValue& operator[](int index) const {
    _ASSERTE(IsArray() && index>=0 && index<array_size);
    return (IsArray() && index>=0 && index<array_size) ? array[index] : *this;
  }

private:

  short type;  // 'a'rray, 'c'lip, 'b'ool, 'i'nt, 'f'loat, 's'tring, 'v'oid, or 'l'ong
  short array_size;
  union {
    IClip* clip;
    bool boolean;
    int integer;
    float floating_pt;
    const char* string;
    const AVSValue* array;
//    __int64 longlong;
  };

  void Assign(const AVSValue* src, bool init) {
    if (src->IsClip() && src->clip)
      src->clip->AddRef();
    if (!init && IsClip() && clip)
      clip->Release();
    // make sure this copies the whole struct!
    ((__int32*)this)[0] = ((__int32*)src)[0];
    ((__int32*)this)[1] = ((__int32*)src)[1];
  }
};


// instantiable null filter
class GenericVideoFilter : public IClip {
protected:
  PClip child;
  VideoInfo vi;
public:
  GenericVideoFilter(PClip _child) : child(_child) { vi = child->GetVideoInfo(); }
  PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* env) { return child->GetFrame(n, env); }
  void __stdcall GetAudio(void* buf, __int64 start, __int64 count, IScriptEnvironment* env) { child->GetAudio(buf, start, count, env); }
  const VideoInfo& __stdcall GetVideoInfo() { return vi; }
  bool __stdcall GetParity(int n) { return child->GetParity(n); }
  void __stdcall SetCacheHints(int cachehints,int frame_range) { } ;  // We do not pass cache requests upwards, only to the next filter.
};


class AvisynthError /* exception */ {
public:
  const char* const msg;
  AvisynthError(const char* _msg) : msg(_msg) {}
};




/* Helper classes useful to plugin authors */

class AlignPlanar : public GenericVideoFilter 
{
public:
  AlignPlanar(PClip _clip);
  static PClip Create(PClip clip);
  PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* env);
};



class FillBorder : public GenericVideoFilter 
{
public:
  FillBorder(PClip _clip);
  static PClip Create(PClip clip);
  PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* env);
};



class ConvertAudio : public GenericVideoFilter 
/**
  * Helper class to convert audio to any format
 **/
{
public:
  ConvertAudio(PClip _clip, int prefered_format);
  void __stdcall GetAudio(void* buf, __int64 start, __int64 count, IScriptEnvironment* env);

  static PClip Create(PClip clip, int sample_type, int prefered_type);
  static AVSValue __cdecl Create_float(AVSValue args, void*, IScriptEnvironment*);
  static AVSValue __cdecl Create_32bit(AVSValue args, void*, IScriptEnvironment*);
  static AVSValue __cdecl Create_24bit(AVSValue args, void*, IScriptEnvironment*);
  static AVSValue __cdecl Create_16bit(AVSValue args, void*, IScriptEnvironment*);
  static AVSValue __cdecl Create_8bit(AVSValue args, void*, IScriptEnvironment*);
  virtual ~ConvertAudio();

private:
  void convertToFloat(char* inbuf, float* outbuf, char sample_type, int count);
  void convertToFloat_3DN(char* inbuf, float* outbuf, char sample_type, int count);
  void convertFromFloat(float* inbuf, void* outbuf, char sample_type, int count);
  void convertFromFloat_3DN(float* inbuf, void* outbuf, char sample_type, int count);
  void convertFromFloat_SSE(float* inbuf, void* outbuf, char sample_type, int count);

  __inline int Saturate_int8(float n);
  __inline short Saturate_int16(float n);
  __inline int Saturate_int24(float n);
  __inline int Saturate_int32(float n);

  char src_format;
  char dst_format;
  int src_bps;
  char *tempbuffer;
  SFLOAT *floatbuffer;
  int tempbuffer_size;
};


// For GetCPUFlags.  These are backwards-compatible with those in VirtualDub.
enum {                    
                    /* slowest CPU to support extension */
  CPUF_FORCE			  = 0x01,   // N/A
  CPUF_FPU			    = 0x02,   // 386/486DX
  CPUF_MMX			    = 0x04,   // P55C, K6, PII
  CPUF_INTEGER_SSE	= 0x08,		// PIII, Athlon
  CPUF_SSE			    = 0x10,		// PIII, Athlon XP/MP
  CPUF_SSE2			    = 0x20,		// PIV, Hammer
  CPUF_3DNOW			  = 0x40,   // K6-2
  CPUF_3DNOW_EXT		= 0x80,		// Athlon
  CPUF_X86_64       = 0xA0,   // Hammer (note: equiv. to 3DNow + SSE2, which only Hammer
                              //         will have anyway)
};
#define MAX_INT 0x7fffffff
#define MIN_INT -0x7fffffff



class IScriptEnvironment {
public:
  virtual __stdcall ~IScriptEnvironment() {}

  virtual /*static*/ long __stdcall GetCPUFlags() = 0;

  virtual char* __stdcall SaveString(const char* s, int length = -1) = 0;
  virtual char* __stdcall Sprintf(const char* fmt, ...) = 0;
  // note: val is really a va_list; I hope everyone typedefs va_list to a pointer
  virtual char* __stdcall VSprintf(const char* fmt, void* val) = 0;

  __declspec(noreturn) virtual void __stdcall ThrowError(const char* fmt, ...) = 0;

  class NotFound /*exception*/ {};  // thrown by Invoke and GetVar

  typedef AVSValue (__cdecl *ApplyFunc)(AVSValue args, void* user_data, IScriptEnvironment* env);

  virtual void __stdcall AddFunction(const char* name, const char* params, ApplyFunc apply, void* user_data) = 0;
  virtual bool __stdcall FunctionExists(const char* name) = 0;
  virtual AVSValue __stdcall Invoke(const char* name, const AVSValue args, const char** arg_names=0) = 0;

  virtual AVSValue __stdcall GetVar(const char* name) = 0;
  virtual bool __stdcall SetVar(const char* name, const AVSValue& val) = 0;
  virtual bool __stdcall SetGlobalVar(const char* name, const AVSValue& val) = 0;

  virtual void __stdcall PushContext(int level=0) = 0;
  virtual void __stdcall PopContext() = 0;

  // align should be 4 or 8
  virtual PVideoFrame __stdcall NewVideoFrame(const VideoInfo& vi, int align=FRAME_ALIGN) = 0;

  virtual bool __stdcall MakeWritable(PVideoFrame* pvf) = 0;

  virtual /*static*/ void __stdcall BitBlt(BYTE* dstp, int dst_pitch, const BYTE* srcp, int src_pitch, int row_size, int height) = 0;

  typedef void (__cdecl *ShutdownFunc)(void* user_data, IScriptEnvironment* env);
  virtual void __stdcall AtExit(ShutdownFunc function, void* user_data) = 0;

  virtual void __stdcall CheckVersion(int version = AVISYNTH_INTERFACE_VERSION) = 0;

  virtual PVideoFrame __stdcall Subframe(PVideoFrame src, int rel_offset, int new_pitch, int new_row_size, int new_height) = 0;

	virtual int __stdcall SetMemoryMax(int mem) = 0;

  virtual int __stdcall SetWorkingDir(const char * newdir) = 0;

};


// avisynth.dll exports this; it's a way to use it as a library, without
// writing an AVS script or without going through AVIFile.
IScriptEnvironment* __stdcall CreateScriptEnvironment(int version = AVISYNTH_INTERFACE_VERSION);


#pragma pack(pop)

#endif //__AVISYNTH_H__