/[svn]/linuxsampler/trunk/src/drivers/audio/AudioOutputDeviceJack.cpp
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revision 2511 by schoenebeck, Wed Jan 1 17:48:01 2014 UTC revision 2512 by schoenebeck, Sun Jan 26 17:47:43 2014 UTC
# Line 3  Line 3 
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6   *   Copyright (C) 2005 - 2013 Christian Schoenebeck                       *   *   Copyright (C) 2005 - 2014 Christian Schoenebeck                       *
7   *                                                                         *   *                                                                         *
8   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
9   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 172  namespace LinuxSampler { Line 172  namespace LinuxSampler {
172      }      }
173    
174    
175    
176    // *************** AudioOutputDeviceJack::ParameterSampleRate ***************
177    // *
178    
179        AudioOutputDeviceJack::ParameterSampleRate::ParameterSampleRate() : AudioOutputDevice::ParameterSampleRate() {
180        }
181    
182        AudioOutputDeviceJack::ParameterSampleRate::ParameterSampleRate(String s) : AudioOutputDevice::ParameterSampleRate(s) {
183        }
184    
185        optional<int> AudioOutputDeviceJack::ParameterSampleRate::DefaultAsInt(std::map<String,String> Parameters) {
186            static int i = 0;
187            // arbitrary JACK client name, that shall not clash with other ones
188            String name = "LinSmPSR" + ToString(i++);
189    #if HAVE_JACK_CLIENT_OPEN
190            jack_client_t* hClient = jack_client_open(name.c_str(), JackNullOption, NULL);
191    #else
192            jack_client_t* hClient = jack_client_new(name.c_str());
193    #endif
194            // Better return "nothing" instead of i.e. 44100 here, so a frontend
195            // like QSampler will not be tempted to pass SAMPLERATE as creation
196            // parameter when creating a new JACK audio device instance.
197            if (!hClient) return optional<int>::nothing;
198            int sampleRate = jack_get_sample_rate(hClient);
199            jack_client_close(hClient);
200            return sampleRate;
201        }
202    
203        void AudioOutputDeviceJack::ParameterSampleRate::OnSetValue(int i) throw (Exception) {
204            // nothing to do: the JACK API does currently not allow JACK clients to
205            // change the sample rate
206        }
207    
208    
209    
210  // *************** AudioOutputDeviceJack ***************  // *************** AudioOutputDeviceJack ***************
211  // *  // *
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