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Commit	Line	Data
	1	////////////////////////////////////////////////////////////////////////////////
	2	// Name: sndfrmt.h
	3	// Purpose: wxMMedia
	4	// Author: Guilhem Lavaux
	5	// Created: 1998
	6	// Updated: December 1998
	7	// Copyright: (C) 1997, 1998, Guilhem Lavaux
	8	// License: wxWindows license
	9	////////////////////////////////////////////////////////////////////////////////
	10	#ifndef __SNDFRMT_H__
	11	#define __SNDFRMT_H__
	12
	13	#ifdef __GNUG__
	14	#pragma interface
	15	#endif
	16
	17	#include <wx/object.h>
	18	#include <wx/stream.h>
	19
	20	class wxSndBuffer;
	21
	22	// Standard Microsoft types (why change ?)
	23	#define WXSOUND_PCM 0x0001
	24	#define WXSOUND_ADPCM 0x0002
	25	#define WXSOUND_ALAW 0x0006
	26	#define WXSOUND_ULAW 0x0007
	27
	28	class wxSoundCodec;
	29	class wxSoundDataFormat {
	30	public:
	31	wxSoundDataFormat();
	32	wxSoundDataFormat(const wxSoundDataFormat& format);
	33	~wxSoundDataFormat();
	34
	35	void SetSampleRate(int srate) { m_srate = srate; }
	36	void SetChannels(int channels);
	37	void SetStereo(bool on);
	38	void SetCodecNo(int no);
	39	int GetCodecNo() { return m_codno; }
	40	void SetCodecCreate(bool create) { m_codcreate = create; }
	41
	42	int GetSampleRate() const { return m_srate; }
	43	int GetChannels() const { return m_channels; }
	44	bool GetStereo() const { return (m_channels == 2); }
	45	int GetCodecNo() const { return m_codno; }
	46
	47	wxSoundCodec *GetCodec();
	48
	49	wxSoundDataFormat& operator =(const wxSoundDataFormat& format);
	50	bool operator ==(const wxSoundDataFormat& format) const;
	51	bool operator !=(const wxSoundDataFormat& format) const
	52	{ return !(operator ==(format)); }
	53
	54	/// PCM format
	55	void SetByteOrder(int order);
	56	void SetSign(int sign);
	57	int GetByteOrder() const { return m_byteorder; }
	58	int GetSign() const { return m_sign; }
	59
	60	void SetBps(int bps);
	61	int GetBps() const { return m_bps; }
	62
	63	protected:
	64	void CodecChange();
	65
	66	protected:
	67	int m_srate, m_bps, m_channels, m_codno;
	68	int m_byteorder, m_sign;
	69	bool m_codchange, m_codcreate;
	70	wxSoundCodec *m_codec;
	71	};
	72
	73	class wxSoundCodec : public wxObject, public wxStreamBase {
	74	DECLARE_ABSTRACT_CLASS(wxSoundCodec)
	75	public:
	76	typedef enum {
	77	WAITING = 0,
	78	ENCODING,
	79	DECODING
	80	} ModeType;
	81	public:
	82	wxSoundCodec();
	83	virtual ~wxSoundCodec();
	84
	85	void SetIOBuffer(wxSndBuffer *sndbuf) { m_io_sndbuf = sndbuf; }
	86	size_t Available();
	87
	88	void InitIO(const wxSoundDataFormat& format);
	89	virtual void InitWith(const wxSoundDataFormat& format) {}
	90
	91	inline void SetInStream(wxStreamBuffer *s)
	92	{ m_in_sound = s; }
	93	inline void SetOutStream(wxStreamBuffer *s)
	94	{ m_out_sound = s; }
	95	inline wxStreamBuffer *GetInStream() const { return m_in_sound; }
	96	inline wxStreamBuffer *GetOutStream() const { return m_out_sound; }
	97
	98	inline bool StreamOk() const
	99	{ return (m_in_sound->Stream()->LastError() == wxStream_NOERROR) &&
	100	(m_out_sound->Stream()->LastError() == wxStream_NOERROR); }
	101
	102	virtual size_t GetByteRate() const = 0;
	103	virtual wxSoundDataFormat GetPreferredFormat(int codec = 0) const = 0;
	104
	105	virtual void InitMode(ModeType mode);
	106	virtual void ExitMode();
	107	virtual void Decode() = 0;
	108	virtual void Encode() = 0;
	109
	110	static wxSoundCodec *Get(int no);
	111
	112	protected:
	113	void CopyToOutput();
	114
	115	unsigned short Convert8_16(unsigned char s) { return (s & 0xff) << 8; }
	116	unsigned char Convert16_8(unsigned short s) { return (s & 0xff00) >> 8; }
	117
	118	bool ChainCodecBefore(wxSoundDataFormat& cod_to);
	119	bool ChainCodecAfter(wxSoundDataFormat& cod_to);
	120
	121	// -------------
	122	// wxStream part
	123	// -------------
	124	size_t OnSysWrite(const void *buffer, size_t bsize);
	125	size_t OnSysRead(void *buffer, size_t bsize);
	126
	127	protected:
	128	wxSndBuffer *m_io_sndbuf;
	129	wxSoundDataFormat m_io_format;
	130	wxStreamBuffer m_in_sound, m_out_sound;
	131	wxSoundCodec *m_chain_codec;
	132	bool m_init, m_chain_before;
	133	ModeType m_mode;
	134	};
	135
	136	#endif