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 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 <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 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;
        };
        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	/***************************************************************************
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 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
32	#include <stdio.h>
33	#include <stdlib.h>
34	#include <unistd.h>
35	#include <time.h>
36
37	#include "global.h"
38	#include "thread.h"
39	#include "voice.h"
40	#include "ringbuffer.h"
41	#include "stream.h"
42
43	int CompareStreamWriteSpace(const void* a, const void* b);
44
45	class DiskThread : public Thread {
46	public:
47	// Methods
48	DiskThread(uint BufferWrapElements);
49	~DiskThread();
50	int OrderNewStream(Stream::reference_t* pStreamRef, gig::Sample* pSample, unsigned long SampleOffset);
51	int OrderDeletionOfStream(Stream::reference_t* pStreamRef);
52	Stream* AskForCreatedStream(Stream::OrderID_t StreamOrderID);
53
54	// the number of streams currently in usage
55	// printed on the console the main thread (along with the active voice count)
56	int ActiveStreamCount;
57	int ActiveStreamCountMax;
58
59	protected:
60	int Main(); ///< Implementation of virtual method from class Thread
61	private:
62	// Private Types
63	struct create_command_t {
64	Stream::OrderID_t OrderID;
65	Stream::Handle hStream;
66	Stream::reference_t* pStreamRef;
67	gig::Sample* pSample;
68	unsigned long SampleOffset;
69	};
70	struct delete_command_t {
71	Stream* pStream;
72	Stream::Handle hStream;
73	Stream::OrderID_t OrderID;
74	};
75
76	// Attributes
77	bool IsIdle;
78	uint Streams;
79	RingBuffer<create_command_t>* CreationQueue; ///< Contains commands to create streams
80	RingBuffer<delete_command_t>* DeletionQueue; ///< Contains commands to delete streams
81	RingBuffer<Stream::Handle>* GhostQueue; ///< Contains handles to streams that are not used anymore and weren't deletable immediately
82	unsigned int RefillStreamsPerRun; ///< How many streams should be refilled in each loop run
83	Stream* pStreams[MAX_INPUT_STREAMS]; ///< Contains all disk streams (wether used or unused)
84	Stream* pCreatedStreams[MAX_INPUT_STREAMS + 1]; ///< This is where the voice (audio thread) picks up it's meanwhile hopefully created disk stream.
85	static Stream* SLOT_RESERVED; ///< This value is used to mark an entry in pCreatedStreams[] as reserved.
86
87	// Methods
88	void CreateStream(create_command_t& Command);
89	void DeleteStream(delete_command_t& Command);
90	void RefillStreams();
91	Stream::Handle CreateHandle();
92	Stream::OrderID_t CreateOrderID();
93	};
94
95	#endif // __DISKTHREAD_H__