// --------------------------------------------------------------------------// Name: sndfile.h// Purpose:// Date: 08/11/1999// Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999// CVSID: $Id: sndfile.h 34412 2005-05-30 12:39:25Z MW $// License:    wxWindows license// --------------------------------------------------------------------------#ifndef _WX_SNDFILE_H#define _WX_SNDFILE_H#include "wx/defs.h"#include "wx/stream.h"#include "wx/mmedia/defs.h"#include "wx/mmedia/sndbase.h"#include "wx/mmedia/sndcodec.h"#define wxSOUND_INFINITE_TIME ((wxUint32)-1)//// Codec router class//class WXDLLIMPEXP_MMEDIA wxSoundRouterStream: public wxSoundStreamCodec { public:  wxSoundRouterStream(wxSoundStream& sndio);  ~wxSoundRouterStream();  wxSoundStream& Read(void *buffer, wxUint32 len);  wxSoundStream& Write(const void *buffer, wxUint32 len);  bool SetSoundFormat(const wxSoundFormatBase& format);  bool StartProduction(int evt);  bool StopProduction();  wxUint32 GetBestSize() const; protected:  wxSoundStream *m_router;};typedef enum { wxSOUND_FILE_STOPPED, wxSOUND_FILE_PAUSED, wxSOUND_FILE_PLAYING, wxSOUND_FILE_RECORDING} wxSoundFileState;//// Base class for file coders/decoders//class WXDLLIMPEXP_MMEDIA wxSoundFileStream: public wxSoundStream {public:    wxSoundFileStream(wxInputStream& stream, wxSoundStream& io_sound);    wxSoundFileStream(wxOutputStream& stream, wxSoundStream& io_sound);    ~wxSoundFileStream();        // Usual sound file calls (Play, Stop, ...)    bool Play();    bool Record(wxUint32 time);    bool Stop();    bool Pause();    bool Resume();        // Functions which return the current state    bool IsStopped() const { return m_state == wxSOUND_FILE_STOPPED; }    bool IsPaused() const { return m_state == wxSOUND_FILE_PAUSED; }        // A user should not call these two functions.    // Several things must be done before calling them.    // Users should use Play(), ...     bool StartProduction(int evt);    bool StopProduction();    // These three functions deals with the length, the position in the sound file.    // All the values are expressed in bytes. If you need the values expressed    // in terms of time, you have to use GetSoundFormat().GetTimeFromBytes(...)    wxUint32 GetLength();    wxUint32 GetPosition();    wxUint32 SetPosition(wxUint32 new_position);        // These two functions use the sound format specified by GetSoundFormat().    // All samples must be encoded in that format.     wxSoundStream& Read(void *buffer, wxUint32 len);     wxSoundStream& Write(const void *buffer, wxUint32 len);        // This function set the sound format of the file. !! It must be used only    // when you are in output mode (concerning the file) !! If you are in    // input mode (concerning the file) you can't use this function to modify    // the format of the samples returned by Read() !    // For this action, you must use wxSoundRouterStream applied to wxSoundFileStream.     bool SetSoundFormat(const wxSoundFormatBase& format);        // This function returns the Codec name. This is useful for those who want to build    // a player (But also in some other case).    virtual wxString GetCodecName() const;        // You should use this function to test whether this file codec can read    // the stream you passed to it.    virtual bool CanRead() { return false; }    protected:    wxSoundRouterStream m_codec;     wxSoundStream *m_sndio;    wxInputStream *m_input;    wxOutputStream *m_output;        wxSoundFileState m_state, m_oldstate;    wxUint32 m_length, m_bytes_left;    bool m_prepared;    protected:    virtual bool PrepareToPlay() = 0;     virtual bool PrepareToRecord(wxUint32 time) = 0;    virtual bool FinishRecording() = 0;    virtual bool RepositionStream(wxUint32 position) = 0;    void FinishPreparation(wxUint32 len);        virtual wxUint32 GetData(void *buffer, wxUint32 len) = 0;    virtual wxUint32 PutData(const void *buffer, wxUint32 len) = 0;        void OnSoundEvent(int evt);};#endif