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AudioSample.h

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00001 /* audiodevs: Abstraction layer for audio hardware & samples 00002 Copyright (C) 2003-2004 Nemosoft Unv. 00003 00004 This program is free software; you can redistribute it and/or modify 00005 it under the terms of the GNU General Public License as published by 00006 the Free Software Foundation; either version 2 of the License, or 00007 (at your option) any later version. 00008 00009 This program is distributed in the hope that it will be useful, 00010 but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 GNU General Public License for more details. 00013 00014 You should have received a copy of the GNU General Public License 00015 along with this program; if not, write to the Free Software 00016 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00017 00018 For questions, remarks, patches, etc. for this program, the author can be 00019 reached at camstream@smcc.demon.nl. 00020 */ 00021 00022 #ifndef AUDIOSAMPLE_HPP 00023 #define AUDIOSAMPLE_HPP 00024 00025 #include <qshared.h> 00026 00027 #include "SoundAttributes.h" 00028 00029 00030 typedef unsigned long SamplePos; 00031 00032 class CAudioSample 00033 { 00034 private: 00035 void Init(); 00036 void ReInit(); 00037 void Reset(); 00038 void CalculateOffsets() const; 00039 00040 protected: 00041 struct SampleData: public QShared // internal 00042 { 00043 SoundAttributes Attributes; 00044 int BytesPerSample; 00045 int PositionOffset[SoundAttributes::MaxPosition]; 00046 00047 void *pMemBuffer; 00048 SamplePos BufLength; 00049 00050 SamplePos BufStartOffset; 00051 } *m_pData; 00052 00053 00054 CAudioSample(const SoundAttributes &attrs, SamplePos buffer_length); 00055 00056 void SetSoundAttributes(const SoundAttributes &) const; 00057 int GetBytesPerSample() const; 00058 00059 bool CreateBuffer(const SoundAttributes &attrs, SamplePos buffer_length); 00060 // ResizeBuffer(SamplePos buffer_length); 00061 void Detach(); 00062 00063 public: 00064 CAudioSample(); 00065 CAudioSample(const CAudioSample &); 00066 virtual ~CAudioSample(); 00067 00068 CAudioSample &operator =(const CAudioSample &audio_sample); 00069 //CAudioSample Copy() const; 00070 00071 SoundAttributes GetSoundAttributes() const; 00072 bool IsNull() const; 00073 00074 virtual SamplePos TotalLength() const; 00075 virtual bool CanSeek() const; 00076 virtual bool SeekTo(SamplePos offset); 00077 00078 virtual int GetValue(SamplePos offset, SoundAttributes::Position channel) const; 00079 virtual void SetValue(SamplePos offset, SoundAttributes::Position channel, int value); 00080 }; 00081 00082 #endif

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