/[svn]/linuxsampler/trunk/src/engines/gig/InstrumentResourceManager.h
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revision 203 by schoenebeck, Tue Jul 13 22:44:13 2004 UTC revision 947 by schoenebeck, Mon Nov 27 21:34:55 2006 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, 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 25  Line 26 
26    
27  #include "../../common/global.h"  #include "../../common/global.h"
28    
29  #if DEBUG_HEADERS  #include <gig.h>
 # warning InstrumentResourceManager.h included  
 #endif // DEBUG_HEADERS  
30    
31  #include "../../common/global.h"  #include "../../common/global.h"
32  #include "../../common/LinuxSamplerException.h"  #include "../../common/Exception.h"
33  #include "../../common/ResourceManager.h"  #include "../../common/ResourceManager.h"
34  #include "../../drivers/audio/AudioOutputDevice.h"  #include "../../drivers/audio/AudioOutputDevice.h"
35  #include "../../lib/fileloader/libgig/gig.h"  #include "../InstrumentManager.h"
   
 // preload 64k samples = 128kB of data in RAM for 16 bit mono samples  
 #define NUM_RAM_PRELOAD_SAMPLES 32768  
36    
37  //namespace libgig = gig;  //namespace libgig = gig;
38    
# Line 46  namespace LinuxSampler { namespace gig { Line 42  namespace LinuxSampler { namespace gig {
42    
43  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
44    
45    #include "EngineChannel.h"
46  #include "Engine.h"  #include "Engine.h"
47    
48  namespace LinuxSampler { namespace gig {  namespace LinuxSampler { namespace gig {
49    
50      // just symbol prototyping      // just symbol prototyping
51      class Engine;      class EngineChannel;
   
     /**  
      * Explicitly identifies a Gigasampler instrument.  
      */  
     struct instrument_id_t {  
         String FileName;    ///< name of the file which contains the instrument  
         uint   iInstrument; ///< index of the instrument in the instrument file  
   
         // TODO: we should extend operator<() so it will be able to detect that file x and file y are actually the same files, e.g. because one of them is a symlink / share the same inode  
         bool operator<(const instrument_id_t& o) const {  
             return (iInstrument < o.iInstrument || (iInstrument == o.iInstrument && FileName < o.FileName));  
         }  
     };  
52    
53      /** Gig instrument manager      /** @brief Gig instrument manager
54       *       *
55       * Manager to share gig instruments between multiple Gigasampler       * Manager to share gig instruments between multiple Gigasampler
56       * engines. The engines Borrow() instruments when they need them and       * engine channels. The engine channels Borrow() instruments when they
57       * HandBack() when they don't need them anymore. The       * need them and HandBack() when they don't need them anymore. The
58       * InstrumentResourceManager loads the corresponding gig file and gig       * InstrumentResourceManager loads the corresponding gig file and gig
59       * instrument if needed, if it's already in use by another engine, then       * instrument if needed, if it's already in use by another engine
60       * it just returns the same resource, if an gig instrument / file is not       * channel, then it just returns the same resource, if an gig
61       * in use by any engine anymore, then it will be freed from memory.       * instrument / file is not needed anymore, then it will be freed from
62         * memory.
63       */       */
64      class InstrumentResourceManager : public ResourceManager<instrument_id_t, ::gig::Instrument> {      class InstrumentResourceManager : public InstrumentManager, public ResourceManager<InstrumentManager::instrument_id_t, ::gig::Instrument> {
65            public:
66                virtual ~InstrumentResourceManager() {}
67                static void OnInstrumentLoadingProgress(::gig::progress_t* pProgress);
68    
69                // implementation of derived abstract methods from 'InstrumentManager'
70                virtual std::vector<instrument_id_t> Instruments();
71                virtual InstrumentManager::mode_t GetMode(const instrument_id_t& ID);
72                virtual void SetMode(const instrument_id_t& ID, InstrumentManager::mode_t Mode);
73                virtual float GetVolume(const instrument_id_t& ID);
74                virtual void SetVolume(const instrument_id_t& ID, float Volume);
75                virtual String GetInstrumentName(instrument_id_t ID);
76          protected:          protected:
77              virtual ::gig::Instrument* Create(instrument_id_t Key, InstrumentConsumer* pConsumer, void*& pArg);              virtual ::gig::Instrument* Create(instrument_id_t Key, InstrumentConsumer* pConsumer, void*& pArg);
78              virtual void               Destroy(::gig::Instrument* pResource, void* pArg);              virtual void               Destroy(::gig::Instrument* pResource, void* pArg);
79              virtual void               OnBorrow(::gig::Instrument* pResource, InstrumentConsumer* pConsumer, void*& pArg);              virtual void               OnBorrow(::gig::Instrument* pResource, InstrumentConsumer* pConsumer, void*& pArg);
80          private:          private:
             struct instr_entry_t {  
                 ::gig::File* pGig;  
                 uint         iInstrument;  
                 uint         MaxSamplesPerCycle; ///< if some engine requests an already allocated instrument with a higher value, we have to reallocate the instrument  
             };  
   
81              typedef ResourceConsumer< ::gig::File> GigConsumer;              typedef ResourceConsumer< ::gig::File> GigConsumer;
82    
83              class GigResourceManager : public ResourceManager<String, ::gig::File> {              class GigResourceManager : public ResourceManager<String, ::gig::File> {
# Line 95  namespace LinuxSampler { namespace gig { Line 85  namespace LinuxSampler { namespace gig {
85                      virtual ::gig::File* Create(String Key, GigConsumer* pConsumer, void*& pArg);                      virtual ::gig::File* Create(String Key, GigConsumer* pConsumer, void*& pArg);
86                      virtual void         Destroy(::gig::File* pResource, void* pArg);                      virtual void         Destroy(::gig::File* pResource, void* pArg);
87                      virtual void         OnBorrow(::gig::File* pResource, GigConsumer* pConsumer, void*& pArg) {} // ignore                      virtual void         OnBorrow(::gig::File* pResource, GigConsumer* pConsumer, void*& pArg) {} // ignore
88                    public:
89                        virtual ~GigResourceManager() {}
90              } Gigs;              } Gigs;
91    
92              void CacheInitialSamples(::gig::Sample* pSample, gig::Engine* pEngine);              void CacheInitialSamples(::gig::Sample* pSample, gig::EngineChannel* pEngineChannel);
93      };      };
94    
95      /**      /**
96       * Will be thrown by the InstrumentResourceManager on errors.       * Will be thrown by the InstrumentResourceManager on errors.
97       */       */
98      class InstrumentResourceManagerException : public LinuxSamplerException {      class InstrumentResourceManagerException : public Exception {
99          public:          public:
100              InstrumentResourceManagerException(String msg) : LinuxSamplerException(msg) {}              InstrumentResourceManagerException(String msg) : Exception(msg) {}
101      };      };
102    
103  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
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