/[svn]/linuxsampler/trunk/src/Sampler.h
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revision 57 by schoenebeck, Sun May 2 17:45:43 2004 UTC revision 898 by schoenebeck, Wed Jul 5 16:29:44 2006 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck         *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6     *   Copyright (C) 2005, 2006 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 26  Line 27 
27  #include <vector>  #include <vector>
28  #include <map>  #include <map>
29  #include "common/global.h"  #include "common/global.h"
30  #include "common/LinuxSamplerException.h"  #include "common/Exception.h"
31  #include "engines/common/Engine.h"  #include "engines/EngineChannel.h"
32  #include "mididriver/MidiInputDevice.h"  #include "drivers/midi/MidiInputDevice.h"
33  #include "audiodriver/AudioOutputDevice.h"  #include "drivers/audio/AudioOutputDevice.h"
34    
35  namespace LinuxSampler {  namespace LinuxSampler {
36    
     /**  
      * Which sampler engine to be used.  
      */  
     enum engine_type_t {  
         engine_type_gig  
     };  
   
     /**  
      * Which audio output system to be used.  
      */  
     enum audio_output_type_t {  
         audio_output_type_alsa,  
         audio_output_type_jack  
     };  
   
     /**  
      * Which MIDI input system to be used.  
      */  
     enum midi_input_type_t {  
         midi_input_type_alsa  
     };  
   
37      // just symbol prototyping      // just symbol prototyping
38      class Sampler;      class Sampler;
39    
40      /** LinuxSampler sampler channel      /** @brief LinuxSampler sampler channel
41       *       *
42       * Encapsulates one sampler engine, one connection to a MIDI input       * Encapsulates a channel of a specific sampler engine type, one
43       * device and one connection to an audio output device. You cannot       * connection to a MIDI input device and one connection to an audio
44       * create an instance of this class on you own, you have to use the       * output device. You cannot create an instance of this class on your
45       * AddSamplerChannel() method of the Sampler object to create a new       * own, you have to use the AddSamplerChannel() method of the Sampler
46       * sampler channel.       * object to create a new sampler channel.
47       */       */
48      class SamplerChannel {      class SamplerChannel {
49          public:          public:
50              /**              /**
51               * Deploy a sampler engine of the given type for this sampler               * Assign a sampler engine type to this sampler channel.
              * channnel. If there was already a sampler engine deployed on  
              * this sampler channel, then the old engine will automatically  
              * be destroyed.  
52               *               *
53               * @param EngineType - type of the engine to deploy               * @param EngineType - type of the engine to use
54                 * @throws Exception - if \a EngineType is invalid
55               */               */
56              void LoadEngine(engine_type_t EngineType);              void SetEngineType(String EngineType) throw (Exception);
57    
58              /**              /**
59               * Connect this sampler channel to an audio output device (that               * Connect this sampler channel to an audio output device, that
60               * is audio output driver) of the given type. If the audio               * is an instance of an audio output driver. If this sampler
61               * output for the desired audio output system is not yet               * channel was already connected to an audio output device, then
62               * created, then it will be created automatically, but with               * the old connection will automatically be removed before.
              * default settings though. If this sampler channel was already  
              * connected to an audio output device, then the old connection  
              * will automatically be removed before.  
63               *               *
64               * @param AudioType - audio output system to connect to               * @param pDevice - audio output device to connect to
65               */               */
66              void SetAudioOutputDevice(audio_output_type_t AudioType);              void SetAudioOutputDevice(AudioOutputDevice* pDevice);
67    
68              /**              /**
69               * Connect this sampler channel to and MIDI input device (that               * Connect this sampler channel to a MIDI input device.
              * is MIDI input driver) of the given type. If the MIDI input  
              * driver for the desired MIDI input system is not yet created,  
              * then it will be created automatically, but with default  
              * settings though. If this sampler channel was already  
              * connected to a MIDI input device, then the old connection  
              * will automatically be removed before.  
70               *               *
71               * @param MidiType    - MIDI input system to connect to               * @param pDevice - MIDI input device to connect to
72                 */
73                void SetMidiInputDevice(MidiInputDevice *pDevice);
74    
75                /**
76                 * Connect this sampler channel to a MIDI input port.
77                 *
78                 * @param MidiPort - MIDI port to connect to
79                 */
80                void SetMidiInputPort(int MidiPort);
81    
82                /**
83                 * Define on which MIDI channel(s) this sampler channel should
84                 * listen to. By default, that is after creation of a new
85                 * sampler channel, the sampler channel will listen to all MIDI
86                 * channels.
87                 *
88                 * @param MidiChannel - MIDI channel to listen
89                 */
90                void SetMidiInputChannel(midi_chan_t MidiChannel);
91    
92                /**
93                 * Connect this sampler channel to a MIDI input triplet.
94                 *
95                 * @param pDevice - MIDI input device to connect to
96                 * @param iMidiPort - MIDI port to connect to
97               * @param MidiChannel - optional: MIDI channel on which the               * @param MidiChannel - optional: MIDI channel on which the
98               *                      sampler channel should listen to               *                      sampler channel should listen to
99               *                      (default: listen on all MIDI channels)               *                      (default: listen on all MIDI channels)
100               */               */
101              void SetMidiInputDevice(midi_input_type_t MidiType, MidiInputDevice::midi_chan_t MidiChannel = MidiInputDevice::midi_chan_all);              void SetMidiInput(MidiInputDevice* pDevice, int iMidiPort, midi_chan_t MidiChannel = midi_chan_all);
102    
103              /**              /**
104               * Returns the engine that was deployed on this sampler channel.               * Returns the EngineChannel object that was deployed on this
105                 * sampler channel appropriate to the given sampler engine type.
106               *               *
107               * @returns  pointer to engine or NULL if no engine deployed               * @returns  pointer to engine or NULL if no engine deployed
108               */               */
109              Engine* GetEngine();              EngineChannel* GetEngineChannel();
110    
111              /**              /**
112               * Returns the MIDI input device to which this sampler channel               * Returns the MIDI input channel to which this sampler
113               * is currently connected to.               * channel is currently connected to.
114               *               *
115               * @returns  pointer to MIDI input device or NULL if not               * @returns  The MIDI input channel on which the sampler
116               *           connected               *           channel is listening to.
117               */               */
118              MidiInputDevice* GetMidiInputDevice();              midi_chan_t GetMidiInputChannel();
119    
120                /**
121                 * Returns the MIDI input port number to which this sampler
122                 * channel is currently connected to.
123                 *
124                 * @returns  MIDI input port number or -1 if not connected
125                 */
126                int GetMidiInputPort();
127    
128              /**              /**
129               * Returns the audio output device to which this sampler channel               * Returns the audio output device to which this sampler channel
# Line 133  namespace LinuxSampler { Line 135  namespace LinuxSampler {
135              AudioOutputDevice* GetAudioOutputDevice();              AudioOutputDevice* GetAudioOutputDevice();
136    
137              /**              /**
138                 * Returns the MIDI input device to which this sampler channel
139                 * is currently connected to.
140                 *
141                 * @returns  pointer to MIDI input device or NULL if not
142                 *           connected
143                 */
144                MidiInputDevice* GetMidiInputDevice();
145    
146                /**
147               * Returns the index number of this sampler channel within the               * Returns the index number of this sampler channel within the
148               * Sampler instance.               * Sampler instance.
149               */               */
# Line 140  namespace LinuxSampler { Line 151  namespace LinuxSampler {
151    
152          protected:          protected:
153              SamplerChannel(Sampler* pS);              SamplerChannel(Sampler* pS);
154             ~SamplerChannel();              virtual ~SamplerChannel();
155    
156                /** Getting MIDI input device port given its index number. */
157                MidiInputPort* __GetMidiInputDevicePort(int iMidiPort);
158    
159              Sampler*           pSampler;              Sampler*           pSampler;
160              Engine*            pEngine;              EngineChannel*     pEngineChannel;
             MidiInputDevice*   pMidiInputDevice;  
161              AudioOutputDevice* pAudioOutputDevice;              AudioOutputDevice* pAudioOutputDevice;
162                MidiInputDevice*   pMidiInputDevice;
163              int                iIndex;              int                iIndex;
164    
165              friend class Sampler;              friend class Sampler;
166            private:
167                int                iMidiPort;   ///< Don't access directly, read GetMidiInputPort() instead !
168                midi_chan_t        midiChannel; ///< Don't access directly, read GetMidiInputChannel() instead !
169      };      };
170    
171      /** LinuxSampler main class      /** @brief LinuxSampler main class
172       *       *
173       * This is the toplevel class for a LinuxSampler instance.       * This is the toplevel class for a LinuxSampler instance.
174       *       *
# Line 159  namespace LinuxSampler { Line 176  namespace LinuxSampler {
176       * sampler channel can individually be deployed with it's own sampler       * sampler channel can individually be deployed with it's own sampler
177       * engine, connected to an arbitrary MIDI input device and connected to       * engine, connected to an arbitrary MIDI input device and connected to
178       * an arbitrary audio output device. Here an example setup:       * an arbitrary audio output device. Here an example setup:
179         * @code
180         * S.Channel    MIDI in    S.Engine         Audio out
181         * -------------------------------------------------------------------
182         *   0          Alsa   ->  gig::Engine  ->  Jack
183         *   1          VSTi   ->  Akai::Engine ->  VSTi
184         *   2          Jack   ->  DLS::Engine  ->  Jack
185         *   3          Jack   ->  SF::Engine   ->  Alsa
186       *       *
187       *  S.Channel.      MIDI in         S.Engine                Audio out       * ... (and so on) ...
188       *  -------------------------------------------------------------------       * @endcode
      *  0               Alsa    ->      gig::Engine     ->      Jack  
      *  1               VSTi    ->      Akai::Engine    ->      VSTi  
      *  2               Jack    ->      DLS::Engine     ->      Jack  
      *  3               Jack    ->      SF::Engine      ->      Alsa  
      *  
      *  ... (and so on) ...  
189       *       *
190       * Note that not all audio and MIDI backends and sampler engines listed       * Note that not all audio and MIDI backends and sampler engines listed
191       * in the example above are already implemented!       * in the example above might already been implemented!
192       *       *
193       * As you can see in the example setup, LinuxSampler is capable to use       * As you can see in the example setup, LinuxSampler is capable to use
194       * several, different audio output and MIDI input systems       * several, different audio output and MIDI input systems
195       * simultaniously at the same time. Here the example setup shown in the       * simultaniously at the same time. Here the example setup shown in the
196       * ascpect of MIDI input and audio output devices / drivers:       * aspect of MIDI input and audio output devices / drivers:
197       *       * @code
198       *                            ######################### #########################       *                      ######################### #########################
199       *                            # AudioOutputDeviceJack # # AudioOutputDeviceVSTi #       *                      # AudioOutputDeviceJack # # AudioOutputDeviceVSTi #
200       *                            ######################### #########################       *                      ######################### #########################
201       *                                          ^   ^           ^       *                                        ^   ^           ^
202       *    /------------>|Sampler Channel 0|-----/   |           |       *  /------------>|Sampler Channel 0|-----/   |           |
203       *    |  /--------->|Sampler Channel 1|---------------------/       *  |  /--------->|Sampler Channel 1|---------------------/
204       *    |  |    /---->|Sampler Channel 2|---------/       *  |  |  /------>|Sampler Channel 2|---------/
205       *    |  |    |  /->|Sampler Channel 3|------------>#########################       *  |  |  |  /--->|Sampler Channel 3|------------>#########################
206       *    |  |    |  |  ... (and so on) ...             # AudioOutputDeviceAlsa #       *  |  |  |  |    ... (and so on) ...             # AudioOutputDeviceAlsa #
207       *    |  |    |  |                                  #########################       *  |  |  |  |                                    #########################
208       *    |  |    |  \----------------------------------------------------\       *  |  |  |  \-----------------------------------------------------\
209       *    |  |    \-------------------------------------------\           |       *  |  |  \--------------------------------------------\           |
210       *    |  \--------------------\                           |           |       *  |  \--------------------\                          |           |
211       *    |                       |                           |           |       *  |                       |                          |           |
212       *  ####################### ####################### #######################       * ####################### ####################### #######################
213       *  # MidiInputDeviceAlsa # # MidiInputDeviceVSTi # # MidiInputDeviceJack #       * # MidiInputDeviceAlsa # # MidiInputDeviceVSTi # # MidiInputDeviceJack #
214       *  ####################### ####################### #######################       * ####################### ####################### #######################
215         * @endcode
216       *       *
217       * As you can see in this example setup, one device (that is midi input       * As you can see in this example setup, one device (that is midi input
218       * driver / audio output driver) can be connected multiple times to       * driver / audio output driver) can be connected multiple times to
219       * different sampler channels.       * different sampler channels.
220         *
221         * It's even possible to create multiple instances of the same driver, for
222         * example multiple instances of the Alsa output driver to use multiple
223         * sound cards at the same time, or multiple instances of the JACK audio
224         * output driver to leverage SMP systems or boxes with several hard discs.
225       */       */
226      class Sampler {      class Sampler {
227          public:          public:
# Line 209  namespace LinuxSampler { Line 233  namespace LinuxSampler {
233              /**              /**
234               * Destructor.               * Destructor.
235               */               */
236             ~Sampler();              virtual ~Sampler();
237    
238              /**              /**
239               * Returns the number of sampler channels currently allocated.               * Returns the number of sampler channels currently allocated.
# Line 217  namespace LinuxSampler { Line 241  namespace LinuxSampler {
241              uint SamplerChannels();              uint SamplerChannels();
242    
243              /**              /**
244               * Create and add a new sampler channel to this Sampler instance.               * Create and add a new sampler channel to this Sampler
245                 * instance. For race condition reasons the new channel will use
246                 * an index past the last already existing sampler channel
247                 * index (in case the index limit was not reached yet, otherwise
248                 * a free index starting from 0 is searched).
249               *               *
250               * @returns  pointer to new sampler channel               * @returns  pointer to new sampler channel
251               */               */
# Line 232  namespace LinuxSampler { Line 260  namespace LinuxSampler {
260              SamplerChannel* GetSamplerChannel(uint uiSamplerChannel);              SamplerChannel* GetSamplerChannel(uint uiSamplerChannel);
261    
262              /**              /**
263                 * Returns all created sampler channels.
264                 */
265                std::map<uint, SamplerChannel*> GetSamplerChannels();
266    
267                /**
268               * Destroy and remove the given sampler channel from this               * Destroy and remove the given sampler channel from this
269               * Sampler instance.               * Sampler instance.
270               *               *
# Line 249  namespace LinuxSampler { Line 282  namespace LinuxSampler {
282              void RemoveSamplerChannel(uint uiSamplerChannel);              void RemoveSamplerChannel(uint uiSamplerChannel);
283    
284              /**              /**
285               * Create an audio output device of the given type.               * Returns the names of all available audio output drivers.
286                 */
287                std::vector<String> AvailableAudioOutputDrivers();
288    
289                /**
290                 * Create an audio output device.
291               *               *
292               * @param AudioType - desired audio output system to use               * @param AudioDriver - name of the audio driver
293                 * @param Parameters - eventually needed driver parameters to
294                 *                     create the device
295               * @returns  pointer to created audio output device               * @returns  pointer to created audio output device
296                 * @throws Exception  if device could not be created
297               */               */
298              AudioOutputDevice* CreateAudioOutputDevice(audio_output_type_t AudioType);              AudioOutputDevice* CreateAudioOutputDevice(String AudioDriver, std::map<String,String> Parameters) throw (Exception);
299    
300              /**              /**
301               * Returns the audio output device of the given type.               * Create a midi input device.
302               *               *
303               * @param AudioType - desired audio output system to use               * @param MidiDriver - name of the midi driver
304               * @returns  pointer to audio output device or NULL if device of               * @param Parameters - eventually needed driver parameters to
305               *           desired type is not yet created               *                     create the device
306                 * @returns  pointer to created midi input device
307                 * @throws Exception  if device could not be created
308               */               */
309              AudioOutputDevice* GetAudioOutputDevice(audio_output_type_t AudioType);              MidiInputDevice* CreateMidiInputDevice(String MidiDriver, std::map<String,String> Parameters) throw (Exception);
310    
311              /**              /**
312               * Create a MIDI input device of the given type.               * Returns the number of all created audio output devices.
313                 */
314                uint AudioOutputDevices();
315    
316                /**
317                 * Returns the number of all created MIDI input devices.
318                 */
319                uint MidiInputDevices();
320    
321                /**
322                 * Returns all created audio output devices.
323                 */
324                std::map<uint, AudioOutputDevice*> GetAudioOutputDevices();
325    
326                /**
327                 * Returns all created MIDI input devices.
328                 */
329                std::map<uint, MidiInputDevice*> GetMidiInputDevices();
330    
331                /**
332                 * Destroy the given audio output device and takes care if there
333                 * are still sampler angines connected to this device, etc.
334               *               *
335               * @param MidiType - desired MIDI input system to use               * @throws Exception  if sampler channels are still
336               * @returns  pointer to created MIDI input device               *                    connected to the device
337               */               */
338              MidiInputDevice* CreateMidiInputDevice(midi_input_type_t MidiType);              void DestroyAudioOutputDevice(AudioOutputDevice* pDevice) throw (Exception);
339    
340              /**              /**
341               * Returns the MIDI input device of the given type.               * Destroy the given MIDI input device and takes care if there
342                 * are still sampler angines connected to this device, etc.
343               *               *
344               * @param MidiType - desired MIDI input system to use               * @throws Exception  if sampler channels are still
345               * @returns  pointer to MIDI input device or NULL if device of               *                    connected to the device
              *           desired type is not yet created  
346               */               */
347              MidiInputDevice* GetMidiInputDevice(midi_input_type_t MidiType);              void DestroyMidiInputDevice(MidiInputDevice* pDevice) throw (Exception);
348    
349          protected:              /**
350              typedef std::map<audio_output_type_t, AudioOutputDevice*> AudioOutputDeviceMap;               * Gets the current number of all active voices.
351              typedef std::map<midi_input_type_t, MidiInputDevice*> MidiInputDeviceMap;               * @returns The current number of all active voices.
352                 */
353                int GetVoiceCount();
354    
355              std::vector<SamplerChannel*> vSamplerChannels;   ///< contains all created sampler channels              /**
356              AudioOutputDeviceMap         AudioOutputDevices; ///< contains all created audio output devices               * Reset the whole sampler. Destroy all engines, sampler
357              MidiInputDeviceMap           MidiInputDevices;               * channels, MIDI input devices and audio output devices.
358                 */
359                void Reset();
360    
361            protected:
362                typedef std::map<uint, AudioOutputDevice*> AudioOutputDeviceMap;
363                typedef std::map<uint, MidiInputDevice*> MidiInputDeviceMap;
364                typedef std::map<uint, SamplerChannel*> SamplerChannelMap;
365    
366                SamplerChannelMap     mSamplerChannels;    ///< contains all created sampler channels
367                AudioOutputDeviceMap  mAudioOutputDevices; ///< contains all created audio output devices
368                MidiInputDeviceMap    mMidiInputDevices;   ///< contains all created MIDI input devices
369    
370              friend class SamplerChannel;              friend class SamplerChannel;
371      };      };
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