trunk/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 MAX_BUF_PERCENT 0.8
#define MIN_REFILL_SIZE 1024
#define MAX_REFILL_SIZE 65536
// the diskstream ringbuffer size (256kB as sample_t is 16bit)
#define STREAM_BUFFER_SIZE 131072
#define MAX_INPUT_STREAMS 100

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>

#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();
        int     OrderNewStream(Stream::reference_t* pStreamRef, gig::Sample* pSample, unsigned long SampleOffset);
        int     OrderDeletionOfStream(Stream::reference_t* pStreamRef);
        Stream* AskForCreatedStream(Stream::OrderID_t StreamOrderID);

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

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

        // Attributes
        bool                          IsIdle;
        uint                          Streams;
        RingBuffer<create_command_t>* CreationQueue;
        RingBuffer<delete_command_t>* DeletionQueue;
        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.

        // 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			#define MAX_BUF_PERCENT 0.8
27			#define MIN_REFILL_SIZE 1024
28			#define MAX_REFILL_SIZE 65536
29			// the diskstream ringbuffer size (256kB as sample_t is 16bit)
30			#define STREAM_BUFFER_SIZE 131072
31			#define MAX_INPUT_STREAMS 100
32
33			#include <stdio.h>
34			#include <stdlib.h>
35			#include <unistd.h>
36	senoner	10	#include <time.h>
37	schoenebeck	9
38			#include "global.h"
39			#include "thread.h"
40			#include "voice.h"
41			#include "ringbuffer.h"
42			#include "stream.h"
43
44			int CompareStreamWriteSpace(const void* a, const void* b);
45
46			class DiskThread : public Thread {
47			public:
48			// Methods
49			DiskThread(uint BufferWrapElements);
50			~DiskThread();
51			int OrderNewStream(Stream::reference_t* pStreamRef, gig::Sample* pSample, unsigned long SampleOffset);
52			int OrderDeletionOfStream(Stream::reference_t* pStreamRef);
53			Stream* AskForCreatedStream(Stream::OrderID_t StreamOrderID);
54	senoner	10
55			// the number of currently active streams
56			// printed on the console the main thread (along with the active voice count)
57			int ActiveStreamCount;
58
59	schoenebeck	9	protected:
60			int Main(); ///< Implementation of virtual method from class Thread
61			private:
62			// Private Types
63			struct create_command_t {
64			Stream::reference_t* pStreamRef;
65			gig::Sample* pSample;
66			unsigned long SampleOffset;
67			};
68			struct delete_command_t {
69			Stream* pStream;
70			Stream::Handle hStream;
71			Stream::OrderID_t OrderID;
72			};
73
74			// Attributes
75			bool IsIdle;
76			uint Streams;
77			RingBuffer<create_command_t>* CreationQueue;
78			RingBuffer<delete_command_t>* DeletionQueue;
79			unsigned int RefillStreamsPerRun; // how many streams should be refilled in each loop run
80			Stream* pStreams[MAX_INPUT_STREAMS]; ///< Contains all disk streams (wether used or unused)
81			Stream* pCreatedStreams[MAX_INPUT_STREAMS + 1]; ///< This is where the voice (audio thread) picks up it's meanwhile hopefully created disk stream.
82
83			// Methods
84			void CreateStream(create_command_t& Command);
85			void DeleteStream(delete_command_t& Command);
86			void RefillStreams();
87			Stream::Handle CreateHandle();
88			Stream::OrderID_t CreateOrderID();
89			};
90
91			#endif // __DISKTHREAD_H__