engines/gig/InstrumentResourceManager.h

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005 Christian Schoenebeck                              *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#ifndef __LS_GIG_INSTRUMENTRESOURCEMANAGER_H__
#define __LS_GIG_INSTRUMENTRESOURCEMANAGER_H__

#include "../../common/global.h"

#if DEBUG_HEADERS
# warning InstrumentResourceManager.h included
#endif // DEBUG_HEADERS

#include "../../common/global.h"
#include "../../common/LinuxSamplerException.h"
#include "../../common/ResourceManager.h"
#include "../../drivers/audio/AudioOutputDevice.h"
#include "../../lib/fileloader/libgig/gig.h"

// preload 64k samples = 128kB of data in RAM for 16 bit mono samples
#define NUM_RAM_PRELOAD_SAMPLES 32768

//namespace libgig = gig;

namespace LinuxSampler { namespace gig {

    typedef ResourceConsumer< ::gig::Instrument> InstrumentConsumer;

}} // namespace LinuxSampler::gig

#include "EngineChannel.h"
#include "Engine.h"

namespace LinuxSampler { namespace gig {

    // just symbol prototyping
    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));
        }
    };

    /** Gig instrument manager
     *
     * Manager to share gig instruments between multiple Gigasampler
     * engine channels. The engine channels Borrow() instruments when they
     * need them and HandBack() when they don't need them anymore. The
     * InstrumentResourceManager loads the corresponding gig file and gig
     * instrument if needed, if it's already in use by another engine
     * channel, then it just returns the same resource, if an gig
     * instrument / file is not in use by any engine channel anymore, then
     * it will be freed from memory.
     */
    class InstrumentResourceManager : public ResourceManager<instrument_id_t, ::gig::Instrument> {
        public:
            virtual ~InstrumentResourceManager() {}
        protected:
            virtual ::gig::Instrument* Create(instrument_id_t Key, InstrumentConsumer* pConsumer, void*& pArg);
            virtual void               Destroy(::gig::Instrument* pResource, void* pArg);
            virtual void               OnBorrow(::gig::Instrument* pResource, InstrumentConsumer* pConsumer, void*& pArg);
        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
            };

            typedef ResourceConsumer< ::gig::File> GigConsumer;

            class GigResourceManager : public ResourceManager<String, ::gig::File> {
                protected:
                    virtual ::gig::File* Create(String Key, GigConsumer* pConsumer, void*& pArg);
                    virtual void         Destroy(::gig::File* pResource, void* pArg);
                    virtual void         OnBorrow(::gig::File* pResource, GigConsumer* pConsumer, void*& pArg) {} // ignore
                public:
                    virtual ~GigResourceManager() {}
            } Gigs;

            void CacheInitialSamples(::gig::Sample* pSample, gig::EngineChannel* pEngineChannel);
    };

    /**
     * Will be thrown by the InstrumentResourceManager on errors.
     */
    class InstrumentResourceManagerException : public LinuxSamplerException {
        public:
            InstrumentResourceManagerException(String msg) : LinuxSamplerException(msg) {}
    };

}} // namespace LinuxSampler::gig

#endif // __LS_GIG_INSTRUMENTRESOURCEMANAGER_H__
1	schoenebeck	53	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5	schoenebeck	56	* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	schoenebeck	411	* Copyright (C) 2005 Christian Schoenebeck *
7	schoenebeck	53	* *
8			* 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 *
10			* the Free Software Foundation; either version 2 of the License, or *
11			* (at your option) any later version. *
12			* *
13			* This program is distributed in the hope that it will be useful, *
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16			* GNU General Public License for more details. *
17			* *
18			* You should have received a copy of the GNU General Public License *
19			* along with this program; if not, write to the Free Software *
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21			* MA 02111-1307 USA *
22			***************************************************************************/
23
24			#ifndef __LS_GIG_INSTRUMENTRESOURCEMANAGER_H__
25			#define __LS_GIG_INSTRUMENTRESOURCEMANAGER_H__
26
27			#include "../../common/global.h"
28
29			#if DEBUG_HEADERS
30			# warning InstrumentResourceManager.h included
31			#endif // DEBUG_HEADERS
32
33			#include "../../common/global.h"
34			#include "../../common/LinuxSamplerException.h"
35			#include "../../common/ResourceManager.h"
36	schoenebeck	203	#include "../../drivers/audio/AudioOutputDevice.h"
37	schoenebeck	53	#include "../../lib/fileloader/libgig/gig.h"
38
39			// preload 64k samples = 128kB of data in RAM for 16 bit mono samples
40			#define NUM_RAM_PRELOAD_SAMPLES 32768
41
42			//namespace libgig = gig;
43
44			namespace LinuxSampler { namespace gig {
45
46			typedef ResourceConsumer< ::gig::Instrument> InstrumentConsumer;
47
48			}} // namespace LinuxSampler::gig
49
50	schoenebeck	411	#include "EngineChannel.h"
51	schoenebeck	53	#include "Engine.h"
52
53			namespace LinuxSampler { namespace gig {
54
55			// just symbol prototyping
56	schoenebeck	411	class EngineChannel;
57	schoenebeck	53
58			/**
59			* Explicitly identifies a Gigasampler instrument.
60			*/
61			struct instrument_id_t {
62			String FileName; ///< name of the file which contains the instrument
63			uint iInstrument; ///< index of the instrument in the instrument file
64
65			// 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
66			bool operator<(const instrument_id_t& o) const {
67			return (iInstrument < o.iInstrument \|\| (iInstrument == o.iInstrument && FileName < o.FileName));
68			}
69			};
70
71			/** Gig instrument manager
72			*
73			* Manager to share gig instruments between multiple Gigasampler
74	schoenebeck	411	* engine channels. The engine channels Borrow() instruments when they
75			* need them and HandBack() when they don't need them anymore. The
76	schoenebeck	53	* InstrumentResourceManager loads the corresponding gig file and gig
77	schoenebeck	411	* instrument if needed, if it's already in use by another engine
78			* channel, then it just returns the same resource, if an gig
79			* instrument / file is not in use by any engine channel anymore, then
80			* it will be freed from memory.
81	schoenebeck	53	*/
82			class InstrumentResourceManager : public ResourceManager<instrument_id_t, ::gig::Instrument> {
83	schoenebeck	411	public:
84			virtual ~InstrumentResourceManager() {}
85	schoenebeck	53	protected:
86			virtual ::gig::Instrument* Create(instrument_id_t Key, InstrumentConsumer* pConsumer, void*& pArg);
87			virtual void Destroy(::gig::Instrument* pResource, void* pArg);
88			virtual void OnBorrow(::gig::Instrument* pResource, InstrumentConsumer* pConsumer, void*& pArg);
89			private:
90			struct instr_entry_t {
91			::gig::File* pGig;
92			uint iInstrument;
93			uint MaxSamplesPerCycle; ///< if some engine requests an already allocated instrument with a higher value, we have to reallocate the instrument
94			};
95
96			typedef ResourceConsumer< ::gig::File> GigConsumer;
97
98			class GigResourceManager : public ResourceManager<String, ::gig::File> {
99			protected:
100			virtual ::gig::File* Create(String Key, GigConsumer* pConsumer, void*& pArg);
101			virtual void Destroy(::gig::File* pResource, void* pArg);
102			virtual void OnBorrow(::gig::File* pResource, GigConsumer* pConsumer, void*& pArg) {} // ignore
103	schoenebeck	411	public:
104			virtual ~GigResourceManager() {}
105	schoenebeck	53	} Gigs;
106
107	schoenebeck	411	void CacheInitialSamples(::gig::Sample* pSample, gig::EngineChannel* pEngineChannel);
108	schoenebeck	53	};
109
110			/**
111			* Will be thrown by the InstrumentResourceManager on errors.
112			*/
113			class InstrumentResourceManagerException : public LinuxSamplerException {
114			public:
115			InstrumentResourceManagerException(String msg) : LinuxSamplerException(msg) {}
116			};
117
118			}} // namespace LinuxSampler::gig
119
120			#endif // __LS_GIG_INSTRUMENTRESOURCEMANAGER_H__