00001 /* 00002 * Copyright: (C) 1999-2001 Bruce W. Forsberg 00003 * 00004 * This library is free software; you can redistribute it and/or 00005 * modify it under the terms of the GNU Lesser General Public 00006 * License as published by the Free Software Foundation; either 00007 * version 2.1 of the License, or any later version. 00008 * 00009 * This library 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 GNU 00012 * Lesser General Public License for more details. 00013 * 00014 * You should have received a copy of the GNU Lesser General Public 00015 * License along with this library; if not, write to the Free Software 00016 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00017 * 00018 * Bruce Forsberg forsberg@tns.net 00019 * 00020 */ 00021 00022 00023 #ifndef _AFLIBAUDIOSAMPLERATECVT_H_ 00024 #define _AFLIBAUDIOSAMPLERATECVT_H_ 00025 00026 #ifdef HAVE_CONFIG_H 00027 #include <config.h> 00028 #endif 00029 00030 00031 #include "aflibAudio.h" 00032 #include "aflibConverter.h" 00033 00034 00047 class aflibAudioSampleRateCvt : public aflibAudio { 00048 00049 public: 00050 00051 // Available contructors and destructors 00052 aflibAudioSampleRateCvt( 00053 aflibAudio& audio, 00054 double factor, 00055 bool linear_interpolation = FALSE, 00056 bool high_quality = FALSE, 00057 bool filter_interpolation = FALSE); 00058 00059 ~aflibAudioSampleRateCvt(); 00060 00061 void 00062 setFactor( 00063 double factor, 00064 double volume = 1.0); 00065 00066 void 00067 setInputConfig(const aflibConfig& cfg); 00068 00070 const char * 00071 getName() const { return "aflibAudioSampleRateCvt";}; 00072 00073 aflibStatus 00074 compute_segment( 00075 list<aflibData*>& data, 00076 long long position = -1) ; 00077 00078 aflibData * 00079 process( 00080 aflibStatus& ret_status, 00081 long long position, 00082 int& num_samples, 00083 bool free_memory = TRUE) ; 00084 00085 bool 00086 isDataSizeSupported(aflib_data_size size); 00087 00088 bool 00089 isChannelsSupported(int& channels); 00090 00091 private: 00092 00093 aflibAudioSampleRateCvt(); 00094 00095 aflibAudioSampleRateCvt(const aflibAudioSampleRateCvt& op); 00096 00097 const aflibAudioSampleRateCvt& 00098 operator=(const aflibAudioSampleRateCvt& op); 00099 00100 00101 int _extra_sample; 00102 int _output_samples; 00103 int _requested_samples; 00104 aflibConverter * _converter; 00105 double _factor; 00106 bool _initial; 00107 int _init_chan; 00108 short *_in_array; 00109 int _in_array_size; 00110 short *_out_array; 00111 int _out_array_size; 00112 double _vol; 00113 00114 // These factors are used for buffering audio data so that we can get 00115 // the audio data as a stream from the parent 00116 long long _next_output_position; 00117 long long _next_input_position; 00118 int _save_samples; 00119 int _prev_in_count; 00120 00121 00122 00123 }; 00124 00125 00126 #endif