8a7c9dcc1c
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1722 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
136 lines
3.7 KiB
C++
136 lines
3.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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// Name: sndfrmt.h
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// Purpose: wxMMedia
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// Author: Guilhem Lavaux
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// Created: 1998
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// Updated: December 1998
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// Copyright: (C) 1997, 1998, Guilhem Lavaux
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// License: wxWindows license
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////////////////////////////////////////////////////////////////////////////////
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#ifndef __SNDFRMT_H__
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#define __SNDFRMT_H__
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#ifdef __GNUG__
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#pragma interface
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#endif
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#include <wx/object.h>
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#include <wx/stream.h>
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class wxSndBuffer;
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// Standard Microsoft types (why change ?)
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#define WXSOUND_PCM 0x0001
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#define WXSOUND_ADPCM 0x0002
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#define WXSOUND_ALAW 0x0006
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#define WXSOUND_ULAW 0x0007
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class wxSoundCodec;
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class wxSoundDataFormat {
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public:
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wxSoundDataFormat();
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wxSoundDataFormat(const wxSoundDataFormat& format);
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~wxSoundDataFormat();
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void SetSampleRate(int srate) { m_srate = srate; }
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void SetChannels(int channels);
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void SetStereo(bool on);
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void SetCodecNo(int no);
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void SetCodecCreate(bool create) { m_codcreate = create; }
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int GetSampleRate() const { return m_srate; }
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int GetChannels() const { return m_channels; }
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bool GetStereo() const { return (m_channels == 2); }
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int GetCodecNo() const { return m_codno; }
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wxSoundCodec *GetCodec();
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wxSoundDataFormat& operator =(const wxSoundDataFormat& format);
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bool operator ==(const wxSoundDataFormat& format) const;
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bool operator !=(const wxSoundDataFormat& format) const
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{ return !(operator ==(format)); }
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/// PCM format
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void SetByteOrder(int order);
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void SetSign(int sign);
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int GetByteOrder() const { return m_byteorder; }
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int GetSign() const { return m_sign; }
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void SetBps(int bps);
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int GetBps() const { return m_bps; }
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protected:
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void CodecChange();
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protected:
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int m_srate, m_bps, m_channels, m_codno;
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int m_byteorder, m_sign;
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bool m_codchange, m_codcreate;
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wxSoundCodec *m_codec;
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};
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class wxSoundCodec : public wxObject, public wxStreamBase {
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DECLARE_ABSTRACT_CLASS(wxSoundCodec)
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public:
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typedef enum {
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WAITING = 0,
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ENCODING,
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DECODING
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} ModeType;
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public:
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wxSoundCodec();
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virtual ~wxSoundCodec();
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void SetIOBuffer(wxSndBuffer *sndbuf) { m_io_sndbuf = sndbuf; }
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size_t Available();
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void InitIO(const wxSoundDataFormat& format);
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virtual void InitWith(const wxSoundDataFormat& format) {}
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inline void SetInStream(wxStreamBuffer *s)
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{ m_in_sound = s; }
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inline void SetOutStream(wxStreamBuffer *s)
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{ m_out_sound = s; }
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inline wxStreamBuffer *GetInStream() const { return m_in_sound; }
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inline wxStreamBuffer *GetOutStream() const { return m_out_sound; }
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inline bool StreamOk() const
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{ return (m_in_sound->Stream()->LastError() == wxStream_NOERROR) &&
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(m_out_sound->Stream()->LastError() == wxStream_NOERROR); }
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virtual size_t GetByteRate() const = 0;
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virtual wxSoundDataFormat GetPreferredFormat(int codec = 0) const = 0;
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virtual void InitMode(ModeType mode);
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virtual void ExitMode();
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virtual void Decode() = 0;
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virtual void Encode() = 0;
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static wxSoundCodec *Get(int no);
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protected:
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void CopyToOutput();
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unsigned short Convert8_16(unsigned char s) { return (s & 0xff) << 8; }
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unsigned char Convert16_8(unsigned short s) { return (s & 0xff00) >> 8; }
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bool ChainCodecBefore(wxSoundDataFormat& cod_to);
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bool ChainCodecAfter(wxSoundDataFormat& cod_to);
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// -------------
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// wxStream part
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// -------------
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size_t OnSysWrite(const void *buffer, size_t bsize);
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size_t OnSysRead(void *buffer, size_t bsize);
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protected:
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wxSndBuffer *m_io_sndbuf;
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wxSoundDataFormat m_io_format;
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wxStreamBuffer *m_in_sound, *m_out_sound;
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wxSoundCodec *m_chain_codec;
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bool m_init, m_chain_before;
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ModeType m_mode;
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};
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#endif
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