Jack2 1.9.7
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00001 /* 00002 Copyright (C) 2008 Grame 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., 675 Mass Ave, Cambridge, MA 02139, USA. 00017 00018 */ 00019 00020 #ifndef __JackResampler__ 00021 #define __JackResampler__ 00022 00023 #include "ringbuffer.h" 00024 #include "types.h" 00025 #include "JackError.h" 00026 00027 namespace Jack 00028 { 00029 00030 #define DEFAULT_RB_SIZE 32768 00031 #define DEFAULT_ADAPTATIVE_SIZE 2048 00032 00033 inline float Range(float min, float max, float val) 00034 { 00035 return (val < min) ? min : ((val > max) ? max : val); 00036 } 00037 00042 class JackResampler 00043 { 00044 00045 protected: 00046 00047 jack_ringbuffer_t* fRingBuffer; 00048 double fRatio; 00049 unsigned int fRingBufferSize; 00050 00051 public: 00052 00053 JackResampler(); 00054 virtual ~JackResampler(); 00055 00056 virtual void Reset(unsigned int new_size); 00057 00058 virtual unsigned int ReadResample(jack_default_audio_sample_t* buffer, unsigned int frames); 00059 virtual unsigned int WriteResample(jack_default_audio_sample_t* buffer, unsigned int frames); 00060 00061 virtual unsigned int Read(jack_default_audio_sample_t* buffer, unsigned int frames); 00062 virtual unsigned int Write(jack_default_audio_sample_t* buffer, unsigned int frames); 00063 00064 virtual unsigned int ReadSpace(); 00065 virtual unsigned int WriteSpace(); 00066 00067 unsigned int GetError() 00068 { 00069 return (jack_ringbuffer_read_space(fRingBuffer) / sizeof(float)) - (fRingBufferSize / 2); 00070 } 00071 00072 void SetRatio(double ratio) 00073 { 00074 fRatio = Range(0.25, 4.0, ratio); 00075 } 00076 00077 double GetRatio() 00078 { 00079 return fRatio; 00080 } 00081 00082 }; 00083 } 00084 00085 #endif