v0_1_0/src/diskthread.h

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003 by Benno Senoner                                   *
 *                                                                         *
 *   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 __DISKTHREAD_H__
#define __DISKTHREAD_H__

#define REFILL_STREAMS_PER_RUN          4       ///< number of streams that should be refilled with each disk thread cycle
#define MIN_REFILL_SIZE                 1024    ///< if no buffer was filled up more than this bottom limit, the disk thread will go to sleep
#define MAX_REFILL_SIZE                 65536   ///< maximum of samples a buffer should be refilled in one cycle (256kB, as 16 bit stereo)
#define STREAM_BUFFER_SIZE              131072  ///< the diskstream ringbuffer size (256kB as sample_t is 16bit)
#define MAX_INPUT_STREAMS               100     ///< number of streams that should be allocated

#include "global.h"
#include "thread.h"
#include "voice.h"
#include "ringbuffer.h"
#include "stream.h"

int CompareStreamWriteSpace(const void* a, const void* b);

class DiskThread : public Thread {
    public:
        // Methods
        DiskThread(uint BufferWrapElements);
       ~DiskThread();
        void    Reset();
        String  GetBufferFillBytes();
        String  GetBufferFillPercentage();
        int     OrderNewStream(Stream::reference_t* pStreamRef, gig::Sample* pSample, unsigned long SampleOffset, bool DoLoop);
        int     OrderDeletionOfStream(Stream::reference_t* pStreamRef);
        Stream* AskForCreatedStream(Stream::OrderID_t StreamOrderID);

        // the number of streams currently in usage
        // printed on the console the main thread (along with the active voice count)
        int ActiveStreamCount;
        int ActiveStreamCountMax;

    protected:
        int Main(); ///< Implementation of virtual method from class Thread
    private:
        // Private Types
        struct create_command_t {
            Stream::OrderID_t    OrderID;
            Stream::Handle       hStream;
            Stream::reference_t* pStreamRef;
            gig::Sample*         pSample;
            unsigned long        SampleOffset;
            bool                 DoLoop;
        };
        struct delete_command_t {
            Stream*           pStream;
            Stream::Handle    hStream;
            Stream::OrderID_t OrderID;
        };

        // Attributes
        bool                           IsIdle;
        uint                           Streams;
        RingBuffer<create_command_t>*  CreationQueue;                          ///< Contains commands to create streams
        RingBuffer<delete_command_t>*  DeletionQueue;                          ///< Contains commands to delete streams
        RingBuffer<Stream::Handle>*    GhostQueue;                             ///< Contains handles to streams that are not used anymore and weren't deletable immediately
        unsigned int                   RefillStreamsPerRun;                    ///< How many streams should be refilled in each loop run
        Stream*                        pStreams[MAX_INPUT_STREAMS];            ///< Contains all disk streams (wether used or unused)
        Stream*                        pCreatedStreams[MAX_INPUT_STREAMS + 1]; ///< This is where the voice (audio thread) picks up it's meanwhile hopefully created disk stream.
        static Stream*                 SLOT_RESERVED;                          ///< This value is used to mark an entry in pCreatedStreams[] as reserved.

        // Methods
        void                           CreateStream(create_command_t& Command);
        void                           DeleteStream(delete_command_t& Command);
        void                           RefillStreams();
        Stream::Handle                 CreateHandle();
        Stream::OrderID_t              CreateOrderID();
};

#endif // __DISKTHREAD_H__
1	schoenebeck	9	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5			* Copyright (C) 2003 by Benno Senoner *
6			* *
7			* This program is free software; you can redistribute it and/or modify *
8			* it under the terms of the GNU General Public License as published by *
9			* the Free Software Foundation; either version 2 of the License, or *
10			* (at your option) any later version. *
11			* *
12			* This program is distributed in the hope that it will be useful, *
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15			* GNU General Public License for more details. *
16			* *
17			* You should have received a copy of the GNU General Public License *
18			* along with this program; if not, write to the Free Software *
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
20			* MA 02111-1307 USA *
21			***************************************************************************/
22
23			#ifndef __DISKTHREAD_H__
24			#define __DISKTHREAD_H__
25
26	schoenebeck	18	#define REFILL_STREAMS_PER_RUN 4 ///< number of streams that should be refilled with each disk thread cycle
27			#define MIN_REFILL_SIZE 1024 ///< if no buffer was filled up more than this bottom limit, the disk thread will go to sleep
28			#define MAX_REFILL_SIZE 65536 ///< maximum of samples a buffer should be refilled in one cycle (256kB, as 16 bit stereo)
29			#define STREAM_BUFFER_SIZE 131072 ///< the diskstream ringbuffer size (256kB as sample_t is 16bit)
30			#define MAX_INPUT_STREAMS 100 ///< number of streams that should be allocated
31	schoenebeck	9
32			#include "global.h"
33			#include "thread.h"
34			#include "voice.h"
35			#include "ringbuffer.h"
36			#include "stream.h"
37
38			int CompareStreamWriteSpace(const void* a, const void* b);
39
40			class DiskThread : public Thread {
41			public:
42			// Methods
43			DiskThread(uint BufferWrapElements);
44			~DiskThread();
45	schoenebeck	35	void Reset();
46			String GetBufferFillBytes();
47			String GetBufferFillPercentage();
48	schoenebeck	26	int OrderNewStream(Stream::reference_t* pStreamRef, gig::Sample* pSample, unsigned long SampleOffset, bool DoLoop);
49	schoenebeck	9	int OrderDeletionOfStream(Stream::reference_t* pStreamRef);
50			Stream* AskForCreatedStream(Stream::OrderID_t StreamOrderID);
51	senoner	10
52	schoenebeck	13	// the number of streams currently in usage
53	senoner	10	// printed on the console the main thread (along with the active voice count)
54			int ActiveStreamCount;
55	schoenebeck	13	int ActiveStreamCountMax;
56	senoner	10
57	schoenebeck	9	protected:
58			int Main(); ///< Implementation of virtual method from class Thread
59			private:
60			// Private Types
61			struct create_command_t {
62	schoenebeck	18	Stream::OrderID_t OrderID;
63			Stream::Handle hStream;
64	schoenebeck	9	Stream::reference_t* pStreamRef;
65			gig::Sample* pSample;
66			unsigned long SampleOffset;
67	schoenebeck	26	bool DoLoop;
68	schoenebeck	9	};
69			struct delete_command_t {
70			Stream* pStream;
71			Stream::Handle hStream;
72			Stream::OrderID_t OrderID;
73			};
74
75			// Attributes
76	schoenebeck	18	bool IsIdle;
77			uint Streams;
78			RingBuffer<create_command_t>* CreationQueue; ///< Contains commands to create streams
79			RingBuffer<delete_command_t>* DeletionQueue; ///< Contains commands to delete streams
80			RingBuffer<Stream::Handle>* GhostQueue; ///< Contains handles to streams that are not used anymore and weren't deletable immediately
81			unsigned int RefillStreamsPerRun; ///< How many streams should be refilled in each loop run
82			Stream* pStreams[MAX_INPUT_STREAMS]; ///< Contains all disk streams (wether used or unused)
83			Stream* pCreatedStreams[MAX_INPUT_STREAMS + 1]; ///< This is where the voice (audio thread) picks up it's meanwhile hopefully created disk stream.
84			static Stream* SLOT_RESERVED; ///< This value is used to mark an entry in pCreatedStreams[] as reserved.
85	schoenebeck	9
86			// Methods
87	schoenebeck	18	void CreateStream(create_command_t& Command);
88			void DeleteStream(delete_command_t& Command);
89			void RefillStreams();
90			Stream::Handle CreateHandle();
91			Stream::OrderID_t CreateOrderID();
92	schoenebeck	9	};
93
94			#endif // __DISKTHREAD_H__