Marsyas
0.6.0-alpha
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00001 /* 00002 ** Copyright (C) 1998-2013 George Tzanetakis <gtzan@cs.uvic.ca> 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 00019 00020 #ifndef MARSYAS_AUDIOSINK_H 00021 #define MARSYAS_AUDIOSINK_H 00022 00023 #include <marsyas/realtime/realvec_queue.h> 00024 #include <marsyas/system/MarSystem.h> 00025 00026 #include "RtAudio.h" 00027 00028 #include <mutex> 00029 #include <condition_variable> 00030 #include <atomic> 00031 00032 00033 class RtAudio; 00034 class Thread; 00035 00036 00037 00038 namespace Marsyas 00039 { 00040 00061 class AudioSink:public MarSystem 00062 { 00063 private: 00064 00065 struct OutputData 00066 { 00067 OutputData(): underrun(false) {} 00068 OutputData(const OutputData &): underrun(false) {} 00069 00070 std::mutex mutex; 00071 std::condition_variable condition; 00072 00073 realvec_queue buffer; 00074 00075 std::atomic<mrs_natural> watermark; 00076 bool underrun; 00077 00078 unsigned int channel_count; 00079 unsigned int sample_rate; 00080 00081 } shared; 00082 00083 mrs_real old_source_sample_rate_; 00084 mrs_natural old_dest_block_size_; 00085 00086 realvec resampler_output_; 00087 MarSystem* resampler_; 00088 00089 RtAudio* audio_; 00090 00091 bool isInitialized_; 00092 bool stopped_; 00093 bool is_resampling_; 00094 00095 void addControls(); 00096 void myUpdate(MarControlPtr sender); 00097 00098 void initRtAudio( 00099 unsigned int* sample_rate, 00100 unsigned int* block_size, 00101 unsigned int channel_count, 00102 bool realtime 00103 ); 00104 00105 void start(); 00106 void stop(); 00107 00108 void localActivate(bool state); 00109 00110 void configureResampler(mrs_real in_sample_rate, mrs_natural in_block_size, 00111 mrs_real out_sample_rate, mrs_natural *out_block_size, 00112 mrs_natural channel_count); 00113 00114 void updateResamplerBlockSize(mrs_natural in_block_size, 00115 mrs_natural *out_block_size, 00116 mrs_natural channel_count); 00117 00118 void clearBuffer(); 00119 bool reformatBuffer(mrs_natural sourceBlockSize, 00120 mrs_natural destBlockSize, 00121 mrs_natural channel_count, 00122 bool realtime, bool resize); 00123 00124 00125 static int playCallback(void *outputBuffer, void *inputBuffer, 00126 unsigned int nBufferFrames, double streamTime, unsigned int status, void *userData); 00127 void playCallback_test(); 00128 00129 00130 public: 00131 AudioSink(std::string name); 00132 ~AudioSink(); 00133 AudioSink(const AudioSink& a); 00134 00135 MarSystem* clone() const; 00136 00137 void myProcess(realvec& in, realvec& out); 00138 }; 00139 00140 }//namespace Marsyas 00141 00142 #endif