/[svn]/linuxsampler/trunk/src/drivers/audio/AudioOutputDeviceJack.cpp
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Diff of /linuxsampler/trunk/src/drivers/audio/AudioOutputDeviceJack.cpp

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revision 1764 by persson, Sat Sep 6 14:55:18 2008 UTC revision 2410 by schoenebeck, Sat Feb 2 18:52:15 2013 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 - 2008 Christian Schoenebeck                       *   *   Copyright (C) 2005 - 2013 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 120  namespace LinuxSampler { Line 120  namespace LinuxSampler {
120          if (!hJackPort) throw AudioOutputException("Jack: Cannot register Jack output port.");          if (!hJackPort) throw AudioOutputException("Jack: Cannot register Jack output port.");
121          return (float*) jack_port_get_buffer(hJackPort, pDevice->uiMaxSamplesPerCycle);          return (float*) jack_port_get_buffer(hJackPort, pDevice->uiMaxSamplesPerCycle);
122      }      }
123        
124        void AudioOutputDeviceJack::AudioChannelJack::UpdateJackBuffer(uint size) {
125            SetBuffer(
126               (float*)jack_port_get_buffer(hJackPort, size)
127            );
128        }
129    
130    
131    
# Line 203  namespace LinuxSampler { Line 209  namespace LinuxSampler {
209       */       */
210      int AudioOutputDeviceJack::Process(uint Samples) {      int AudioOutputDeviceJack::Process(uint Samples) {
211          int res;          int res;
212            
213            // in recent versions of JACK2 and JACk1, we are forced to
214            // re-retrieve the audio buffer pointers in each process period
215            UpdateJackBuffers(Samples);
216            
217          if (csIsPlaying.Pop()) {          if (csIsPlaying.Pop()) {
218              // let all connected engines render 'Samples' sample points              // let all connected engines render 'Samples' sample points
219              res = RenderAudio(Samples);              res = RenderAudio(Samples);
# Line 214  namespace LinuxSampler { Line 225  namespace LinuxSampler {
225          csIsPlaying.RttDone();          csIsPlaying.RttDone();
226          return res;          return res;
227      }      }
228        
229        void AudioOutputDeviceJack::UpdateJackBuffers(uint size) {
230            for (int i = 0; i < Channels.size(); ++i)
231                static_cast<AudioChannelJack*>(Channels[i])->UpdateJackBuffer(size);
232        }
233        
234        float AudioOutputDeviceJack::latency() {
235            if (!hJackClient) return -1;
236            const float size = jack_get_buffer_size(hJackClient);
237            const float rate = jack_get_sample_rate(hJackClient);
238            return size / rate;
239        }
240    
241      void AudioOutputDeviceJack::Play() {      void AudioOutputDeviceJack::Play() {
242          csIsPlaying.PushAndUnlock(true);          csIsPlaying.PushAndUnlock(true);
# Line 271  namespace LinuxSampler { Line 294  namespace LinuxSampler {
294          static_cast<JackClient*>(arg)->Stop();          static_cast<JackClient*>(arg)->Stop();
295          fprintf(stderr, "Jack: Jack server shutdown, exiting.\n");          fprintf(stderr, "Jack: Jack server shutdown, exiting.\n");
296      }      }
297        
298        int JackClient::libjackSampleRateCallback(jack_nframes_t nframes, void *arg) {
299            JackClient* client = static_cast<JackClient*>(arg);
300            const config_t& config = client->ConfigReader.Lock();
301            if (config.AudioDevice)
302                config.AudioDevice->ReconnectAll();
303            client->ConfigReader.Unlock();
304            return 0;
305        }
306        
307        int JackClient::libjackBufferSizeCallback(jack_nframes_t nframes, void *arg) {
308            dmsg(1,("libjackBufferSizeCallback(%d)\n",nframes));
309            JackClient* client = static_cast<JackClient*>(arg);
310            const config_t& config = client->ConfigReader.Lock();
311            if (config.AudioDevice) {
312                config.AudioDevice->UpdateJackBuffers(nframes);
313                config.AudioDevice->ReconnectAll();
314            }
315            client->ConfigReader.Unlock();
316            return 0;
317        }
318    
319      std::map<String, JackClient*> JackClient::Clients;      std::map<String, JackClient*> JackClient::Clients;
320    
# Line 317  namespace LinuxSampler { Line 361  namespace LinuxSampler {
361              throw Exception("Seems Jack server is not running.");              throw Exception("Seems Jack server is not running.");
362          jack_set_process_callback(hJackClient, linuxsampler_libjack_process_callback, this);          jack_set_process_callback(hJackClient, linuxsampler_libjack_process_callback, this);
363          jack_on_shutdown(hJackClient, linuxsampler_libjack_shutdown_callback, this);          jack_on_shutdown(hJackClient, linuxsampler_libjack_shutdown_callback, this);
364            jack_set_buffer_size_callback(hJackClient, libjackBufferSizeCallback, this);
365            jack_set_sample_rate_callback(hJackClient, libjackSampleRateCallback, this);
366            
367          if (jack_activate(hJackClient))          if (jack_activate(hJackClient))
368              throw Exception("Jack: Cannot activate Jack client.");              throw Exception("Jack: Cannot activate Jack client.");
369      }      }
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