4db94043cb
Files correlati : Commento : Spostamento in libraries delle librerie esterne di Campo per una maggiore pulizia e organizzazione git-svn-id: svn://10.65.10.50/branches/R_10_00@24150 c028cbd2-c16b-5b4b-a496-9718f37d4682
103 lines
2.9 KiB
C++
103 lines
2.9 KiB
C++
// --------------------------------------------------------------------------
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// Name: sndmsad(pcm).h
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// Purpose: MS ADPCM codec
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// Date: 25/02/2000
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// Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 2000
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// CVSID: $Id: sndmsad.h 35650 2005-09-23 12:56:45Z MR $
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// License: wxWindows license
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// --------------------------------------------------------------------------
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#ifndef _WX_SNDMSAD_H
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#define _WX_SNDMSAD_H
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#include "wx/defs.h"
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#include "wx/dynarray.h"
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#include "wx/mmedia/defs.h"
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#include "wx/mmedia/sndcodec.h"
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#include "wx/mmedia/sndbase.h"
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WX_DEFINE_EXPORTED_ARRAY_INT(wxInt16, wxMSAdpcmCoeffs);
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//
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// MSADPCM format
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//
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class WXDLLIMPEXP_MMEDIA wxSoundFormatMSAdpcm: public wxSoundFormatBase {
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public:
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wxSoundFormatMSAdpcm();
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~wxSoundFormatMSAdpcm();
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void SetSampleRate(wxUint32 srate);
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wxUint32 GetSampleRate() const;
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void SetCoefs(wxInt16 **coefs, wxUint16 ncoefs, wxUint16 coefs_len);
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void GetCoefs(wxInt16 **&coefs, wxUint16& ncoefs,
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wxUint16& coefs_len) const;
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void SetBlockSize(wxUint16 block_size);
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wxUint16 GetBlockSize() const;
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void SetChannels(wxUint16 channels);
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wxUint16 GetChannels() const;
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wxSoundFormatType GetType() const { return wxSOUND_MSADPCM; }
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wxSoundFormatBase *Clone() const;
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wxUint32 GetTimeFromBytes(wxUint32 bytes) const;
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wxUint32 GetBytesFromTime(wxUint32 time) const;
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bool operator !=(const wxSoundFormatBase& frmt2) const;
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protected:
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wxUint32 m_srate, m_nchannels;
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wxInt16 **m_coefs;
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wxUint16 m_ncoefs, m_coefs_len;
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wxUint16 m_block_size;
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};
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//
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// MS ADPCM converter class
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//
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class WXDLLIMPEXP_MMEDIA wxSoundRouterStream;
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class WXDLLIMPEXP_MMEDIA wxSoundStreamMSAdpcm: public wxSoundStreamCodec {
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public:
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wxSoundStreamMSAdpcm(wxSoundStream& sndio);
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~wxSoundStreamMSAdpcm();
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wxSoundStream& Read(void *buffer, wxUint32 len);
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wxSoundStream& Write(const void *buffer, wxUint32 len);
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bool SetSoundFormat(const wxSoundFormatBase& format);
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wxUint32 GetBestSize() const;
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protected:
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wxSoundRouterStream *m_router;
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typedef struct {
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wxInt32 predictor;
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wxInt16 samp1;
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wxInt16 samp2;
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wxInt16 coeff[2];
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wxInt32 iDelta;
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} AdpcmState;
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AdpcmState m_state[1];
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bool m_got_header;
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bool m_stereo;
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wxInt16 **m_coefs;
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wxUint16 m_block_size;
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wxUint16 m_ncoefs;
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wxUint16 m_next_block;
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protected:
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wxUint32 DecodeMonoADPCM(const void *in_buffer, void *out_buffer,
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wxUint32 in_len);
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wxUint32 DecodeStereoADPCM(const void *in_buffer, void *out_buffer,
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wxUint32 in_len);
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void Nibble(wxInt8 nyb,
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AdpcmState *state,
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wxInt16 **out_buffer);
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};
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#endif
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