/[svn]/linuxsampler/trunk/src/drivers/audio/AudioOutputDeviceAlsa.cpp
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revision 214 by schoenebeck, Sat Aug 14 23:00:44 2004 UTC revision 531 by schoenebeck, Mon May 9 14:25:09 2005 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 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 25  Line 26 
26    
27  namespace LinuxSampler {  namespace LinuxSampler {
28    
     REGISTER_AUDIO_OUTPUT_DRIVER(AudioOutputDeviceAlsa);  
   
     /* Common parameters for now they'll have to be registered here. */  
     REGISTER_AUDIO_OUTPUT_DRIVER_PARAMETER(AudioOutputDeviceAlsa, ParameterActive);  
     REGISTER_AUDIO_OUTPUT_DRIVER_PARAMETER(AudioOutputDeviceAlsa, ParameterSampleRate);  
     REGISTER_AUDIO_OUTPUT_DRIVER_PARAMETER(AudioOutputDeviceAlsa, ParameterChannels);  
   
     /* Driver specific parameters */  
     REGISTER_AUDIO_OUTPUT_DRIVER_PARAMETER(AudioOutputDeviceAlsa, ParameterCard);  
     REGISTER_AUDIO_OUTPUT_DRIVER_PARAMETER(AudioOutputDeviceAlsa, ParameterFragments);  
     REGISTER_AUDIO_OUTPUT_DRIVER_PARAMETER(AudioOutputDeviceAlsa, ParameterFragmentSize);  
   
   
   
29  // *************** ParameterCard ***************  // *************** ParameterCard ***************
30  // *  // *
31    
# Line 47  namespace LinuxSampler { Line 34  namespace LinuxSampler {
34      }      }
35    
36      AudioOutputDeviceAlsa::ParameterCard::ParameterCard(String s) throw (LinuxSamplerException) : DeviceCreationParameterString(s) {      AudioOutputDeviceAlsa::ParameterCard::ParameterCard(String s) throw (LinuxSamplerException) : DeviceCreationParameterString(s) {
         SetValue(s); // try to use given card  
37      }      }
38    
39      String AudioOutputDeviceAlsa::ParameterCard::Description() {      String AudioOutputDeviceAlsa::ParameterCard::Description() {
# Line 105  namespace LinuxSampler { Line 91  namespace LinuxSampler {
91      }      }
92    
93      String AudioOutputDeviceAlsa::ParameterCard::Name() {      String AudioOutputDeviceAlsa::ParameterCard::Name() {
94          return "card";          return "CARD";
95      }      }
96    
97    
# Line 144  namespace LinuxSampler { Line 130  namespace LinuxSampler {
130      }      }
131    
132      optional<int> AudioOutputDeviceAlsa::ParameterFragments::RangeMinAsInt(std::map<String,String> Parameters) {      optional<int> AudioOutputDeviceAlsa::ParameterFragments::RangeMinAsInt(std::map<String,String> Parameters) {
133          return optional<int>::nothing;          if (!Parameters.count("CARD")) return optional<int>::nothing;
134    
135            // obtain information from given sound card
136            String pcm_name       = "hw:" + Parameters["CARD"];
137            snd_pcm_t* pcm_handle = NULL;
138            if (snd_pcm_open(&pcm_handle, pcm_name.c_str(), SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK) < 0) return optional<int>::nothing;
139            snd_pcm_hw_params_t* hwparams;
140            snd_pcm_hw_params_alloca(&hwparams);
141            if (snd_pcm_hw_params_any(pcm_handle, hwparams) < 0) {
142                snd_pcm_close(pcm_handle);
143                return optional<int>::nothing;
144            }
145            int dir = 0;
146            uint periods_min;
147            if (snd_pcm_hw_params_get_periods_min(hwparams, &periods_min, &dir) < 0) {
148                snd_pcm_close(pcm_handle);
149                return optional<int>::nothing;
150            }
151            snd_pcm_close(pcm_handle);
152            return (int) periods_min;
153      }      }
154    
155      optional<int> AudioOutputDeviceAlsa::ParameterFragments::RangeMaxAsInt(std::map<String,String> Parameters) {      optional<int> AudioOutputDeviceAlsa::ParameterFragments::RangeMaxAsInt(std::map<String,String> Parameters) {
156          return optional<int>::nothing;          if (!Parameters.count("CARD")) return optional<int>::nothing;
157    
158            // obtain information from given sound card
159            String pcm_name       = "hw:" + Parameters["CARD"];
160            snd_pcm_t* pcm_handle = NULL;
161            if (snd_pcm_open(&pcm_handle, pcm_name.c_str(), SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK) < 0) return optional<int>::nothing;
162            snd_pcm_hw_params_t* hwparams;
163            snd_pcm_hw_params_alloca(&hwparams);
164            if (snd_pcm_hw_params_any(pcm_handle, hwparams) < 0) {
165                snd_pcm_close(pcm_handle);
166                return optional<int>::nothing;
167            }
168            int dir = 0;
169            uint periods_max;
170            if (snd_pcm_hw_params_get_periods_max(hwparams, &periods_max, &dir) < 0) {
171                snd_pcm_close(pcm_handle);
172                return optional<int>::nothing;
173            }
174            snd_pcm_close(pcm_handle);
175            return (int) periods_max;
176      }      }
177    
178      std::vector<int> AudioOutputDeviceAlsa::ParameterFragments::PossibilitiesAsInt(std::map<String,String> Parameters) {      std::vector<int> AudioOutputDeviceAlsa::ParameterFragments::PossibilitiesAsInt(std::map<String,String> Parameters) {
# Line 160  namespace LinuxSampler { Line 184  namespace LinuxSampler {
184      }      }
185    
186      String AudioOutputDeviceAlsa::ParameterFragments::Name() {      String AudioOutputDeviceAlsa::ParameterFragments::Name() {
187          return "fragments";          return "FRAGMENTS";
188      }      }
189    
190    
# Line 199  namespace LinuxSampler { Line 223  namespace LinuxSampler {
223      }      }
224    
225      optional<int> AudioOutputDeviceAlsa::ParameterFragmentSize::RangeMinAsInt(std::map<String,String> Parameters) {      optional<int> AudioOutputDeviceAlsa::ParameterFragmentSize::RangeMinAsInt(std::map<String,String> Parameters) {
226          return optional<int>::nothing;          if (!Parameters.count("CARD")) return optional<int>::nothing;
227    
228            // obtain information from given sound card
229            String pcm_name       = "hw:" + Parameters["CARD"];
230            snd_pcm_t* pcm_handle = NULL;
231            if (snd_pcm_open(&pcm_handle, pcm_name.c_str(), SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK) < 0) return optional<int>::nothing;
232            snd_pcm_hw_params_t* hwparams;
233            snd_pcm_hw_params_alloca(&hwparams);
234            if (snd_pcm_hw_params_any(pcm_handle, hwparams) < 0) {
235                snd_pcm_close(pcm_handle);
236                return optional<int>::nothing;
237            }
238            int dir = 0;
239            unsigned long period_size_min;
240            if (snd_pcm_hw_params_get_period_size_min(hwparams, &period_size_min, &dir) < 0) {
241                snd_pcm_close(pcm_handle);
242                return optional<int>::nothing;
243            }
244            snd_pcm_close(pcm_handle);
245            return (int) period_size_min;
246      }      }
247    
248      optional<int> AudioOutputDeviceAlsa::ParameterFragmentSize::RangeMaxAsInt(std::map<String,String> Parameters) {      optional<int> AudioOutputDeviceAlsa::ParameterFragmentSize::RangeMaxAsInt(std::map<String,String> Parameters) {
249          return optional<int>::nothing;          if (!Parameters.count("CARD")) return optional<int>::nothing;
250    
251            // obtain information from given sound card
252            String pcm_name       = "hw:" + Parameters["CARD"];
253            snd_pcm_t* pcm_handle = NULL;
254            if (snd_pcm_open(&pcm_handle, pcm_name.c_str(), SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK) < 0) return optional<int>::nothing;
255            snd_pcm_hw_params_t* hwparams;
256            snd_pcm_hw_params_alloca(&hwparams);
257            if (snd_pcm_hw_params_any(pcm_handle, hwparams) < 0) {
258                snd_pcm_close(pcm_handle);
259                return optional<int>::nothing;
260            }
261            int dir = 0;
262            unsigned long period_size_max;
263            if (snd_pcm_hw_params_get_period_size_max(hwparams, &period_size_max, &dir) < 0) {
264                snd_pcm_close(pcm_handle);
265                return optional<int>::nothing;
266            }
267            snd_pcm_close(pcm_handle);
268            return (int) period_size_max; //FIXME: might overflow int limit
269      }      }
270    
271      std::vector<int> AudioOutputDeviceAlsa::ParameterFragmentSize::PossibilitiesAsInt(std::map<String,String> Parameters) {      std::vector<int> AudioOutputDeviceAlsa::ParameterFragmentSize::PossibilitiesAsInt(std::map<String,String> Parameters) {
# Line 215  namespace LinuxSampler { Line 277  namespace LinuxSampler {
277      }      }
278    
279      String AudioOutputDeviceAlsa::ParameterFragmentSize::Name() {      String AudioOutputDeviceAlsa::ParameterFragmentSize::Name() {
280          return "fragmentsize";          return "FRAGMENTSIZE";
281      }      }
282    
283    
# Line 229  namespace LinuxSampler { Line 291  namespace LinuxSampler {
291       * @param Parameters - optional parameters       * @param Parameters - optional parameters
292       * @throws AudioOutputException  if output device cannot be opened       * @throws AudioOutputException  if output device cannot be opened
293       */       */
294      AudioOutputDeviceAlsa::AudioOutputDeviceAlsa(std::map<String,DeviceCreationParameter*> Parameters) : AudioOutputDevice(Parameters), Thread(true, 1, 0) {      AudioOutputDeviceAlsa::AudioOutputDeviceAlsa(std::map<String,DeviceCreationParameter*> Parameters) : AudioOutputDevice(Parameters), Thread(true, true, 1, 0) {
295          pcm_handle           = NULL;          pcm_handle           = NULL;
296          stream               = SND_PCM_STREAM_PLAYBACK;          stream               = SND_PCM_STREAM_PLAYBACK;
297          this->uiAlsaChannels = ((DeviceCreationParameterInt*)Parameters["channels"])->ValueAsInt();          this->uiAlsaChannels = ((DeviceCreationParameterInt*)Parameters["CHANNELS"])->ValueAsInt();
298          this->uiSamplerate   = ((DeviceCreationParameterInt*)Parameters["samplerate"])->ValueAsInt();          this->uiSamplerate   = ((DeviceCreationParameterInt*)Parameters["SAMPLERATE"])->ValueAsInt();
299          this->FragmentSize   = ((DeviceCreationParameterInt*)Parameters["fragmentsize"])->ValueAsInt();          this->FragmentSize   = ((DeviceCreationParameterInt*)Parameters["FRAGMENTSIZE"])->ValueAsInt();
300          uint Fragments       = ((DeviceCreationParameterInt*)Parameters["fragments"])->ValueAsInt();          uint Fragments       = ((DeviceCreationParameterInt*)Parameters["FRAGMENTS"])->ValueAsInt();
301          String Card          = ((DeviceCreationParameterString*)Parameters["card"])->ValueAsString();          String Card          = ((DeviceCreationParameterString*)Parameters["CARD"])->ValueAsString();
302    
303          dmsg(1,("Checking if hw parameters supported...\n"));          dmsg(2,("Checking if hw parameters supported...\n"));
304          if (HardwareParametersSupported(Card, uiAlsaChannels, uiSamplerate, Fragments, FragmentSize)) {          if (HardwareParametersSupported(Card, uiAlsaChannels, uiSamplerate, Fragments, FragmentSize)) {
305              pcm_name = "hw:" + Card;              pcm_name = "hw:" + Card;
306          }          }
307          else {          else {
308              printf("Warning: your soundcard doesn't support chosen hardware parameters; ");              fprintf(stderr, "Warning: your soundcard doesn't support chosen hardware parameters; ");
309              printf("trying to compensate support lack with plughw...");              fprintf(stderr, "trying to compensate support lack with plughw...");
310              fflush(stdout);              fflush(stdout);
311              pcm_name = "plughw:" + Card;              pcm_name = "plughw:" + Card;
312          }          }
313          dmsg(1,("HW check completed.\n"));          dmsg(2,("HW check completed.\n"));
314    
315          int err;          int err;
316    
# Line 344  namespace LinuxSampler { Line 406  namespace LinuxSampler {
406          pAlsaOutputBuffer = new int16_t[uiAlsaChannels * FragmentSize];          pAlsaOutputBuffer = new int16_t[uiAlsaChannels * FragmentSize];
407    
408          // create audio channels for this audio device to which the sampler engines can write to          // create audio channels for this audio device to which the sampler engines can write to
409          for (int i = 0; i < uiAlsaChannels; i++) this->Channels.push_back(new AudioChannel(FragmentSize));          for (int i = 0; i < uiAlsaChannels; i++) this->Channels.push_back(new AudioChannel(i, FragmentSize));
410    
411          if (((DeviceCreationParameterBool*)Parameters["active"])->ValueAsBool()) {          if (((DeviceCreationParameterBool*)Parameters["ACTIVE"])->ValueAsBool()) {
412                  Play();                  Play();
413          }          }
414      }      }
# Line 359  namespace LinuxSampler { Line 421  namespace LinuxSampler {
421          //FIXME: currently commented out due to segfault          //FIXME: currently commented out due to segfault
422          //snd_pcm_close(pcm_handle);          //snd_pcm_close(pcm_handle);
423    
         // destroy all audio channels  
         for (int c = 0; c < Channels.size(); c++) delete Channels[c];  
   
424          if (pAlsaOutputBuffer) {          if (pAlsaOutputBuffer) {
425              //FIXME: currently commented out due to segfault              //FIXME: currently commented out due to segfault
426              //delete[] pOutputBuffer;              //delete[] pOutputBuffer;
# Line 372  namespace LinuxSampler { Line 431  namespace LinuxSampler {
431       *  Checks if sound card supports the chosen parameters.       *  Checks if sound card supports the chosen parameters.
432       *       *
433       *  @returns  true if hardware supports it       *  @returns  true if hardware supports it
434         *  @throws AudioOutputException - if device cannot be accessed
435       */       */
436      bool AudioOutputDeviceAlsa::HardwareParametersSupported(String card, uint channels, int samplerate, uint numfragments, uint fragmentsize) {      bool AudioOutputDeviceAlsa::HardwareParametersSupported(String card, uint channels, int samplerate, uint numfragments, uint fragmentsize) throw (AudioOutputException) {
437          pcm_name = "hw:" + card;          pcm_name = "hw:" + card;
438          if (snd_pcm_open(&pcm_handle, pcm_name.c_str(), stream, 0) < 0) return false;          int err;
439            if ((err = snd_pcm_open(&pcm_handle, pcm_name.c_str(), stream, SND_PCM_NONBLOCK)) < 0) {
440                throw AudioOutputException(String("Error opening PCM device ") + pcm_name + ": " + snd_strerror(err));
441            }
442          snd_pcm_hw_params_alloca(&hwparams);          snd_pcm_hw_params_alloca(&hwparams);
443          if (snd_pcm_hw_params_any(pcm_handle, hwparams) < 0) {          if (snd_pcm_hw_params_any(pcm_handle, hwparams) < 0) {
444              snd_pcm_close(pcm_handle);              snd_pcm_close(pcm_handle);
# Line 428  namespace LinuxSampler { Line 491  namespace LinuxSampler {
491          StopThread();          StopThread();
492      }      }
493    
494      void AudioOutputDeviceAlsa::AcquireChannels(uint Channels) {      AudioChannel* AudioOutputDeviceAlsa::CreateChannel(uint ChannelNr) {
495          if (Channels > uiAlsaChannels) {          // just create a mix channel
496              // just create mix channel(s)          return new AudioChannel(ChannelNr, Channel(ChannelNr % uiAlsaChannels));
             for (int i = uiAlsaChannels; i < Channels; i++) {  
                 AudioChannel* pNewChannel = new AudioChannel(this->Channels[i % uiAlsaChannels]);  
                 this->Channels.push_back(pNewChannel);  
             }  
         }  
497      }      }
498    
499      uint AudioOutputDeviceAlsa::MaxSamplesPerCycle() {      uint AudioOutputDeviceAlsa::MaxSamplesPerCycle() {
# Line 447  namespace LinuxSampler { Line 505  namespace LinuxSampler {
505      }      }
506    
507      String AudioOutputDeviceAlsa::Name() {      String AudioOutputDeviceAlsa::Name() {
508          return "Alsa";          return "ALSA";
509      }      }
510    
511      String AudioOutputDeviceAlsa::Driver() {      String AudioOutputDeviceAlsa::Driver() {
# Line 459  namespace LinuxSampler { Line 517  namespace LinuxSampler {
517      }      }
518    
519      String AudioOutputDeviceAlsa::Version() {      String AudioOutputDeviceAlsa::Version() {
520         String s = "$Revision: 1.12 $";         String s = "$Revision: 1.20 $";
521         return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword         return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
522      }      }
523    
# Line 510  namespace LinuxSampler { Line 568  namespace LinuxSampler {
568      }      }
569    
570  } // namespace LinuxSampler  } // namespace LinuxSampler
   
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