/[svn]/linuxsampler/trunk/diskthread.h
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Contents of /linuxsampler/trunk/diskthread.h

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Revision 5 - (show annotations) (download) (as text)
Sat Oct 25 20:24:31 2003 UTC (20 years, 5 months ago) by schoenebeck
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Initial revision

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 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
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 protected:
54 int Main(); ///< Implementation of virtual method from class Thread
55 private:
56 // Private Types
57 struct create_command_t {
58 Stream::reference_t* pStreamRef;
59 gig::Sample* pSample;
60 unsigned long SampleOffset;
61 };
62 struct delete_command_t {
63 Stream* pStream;
64 Stream::Handle hStream;
65 Stream::OrderID_t OrderID;
66 };
67
68 // Attributes
69 bool IsIdle;
70 uint Streams;
71 RingBuffer<create_command_t>* CreationQueue;
72 RingBuffer<delete_command_t>* DeletionQueue;
73 unsigned int RefillStreamsPerRun; // how many streams should be refilled in each loop run
74 Stream* pStreams[MAX_INPUT_STREAMS]; ///< Contains all disk streams (wether used or unused)
75 Stream* pCreatedStreams[MAX_INPUT_STREAMS + 1]; ///< This is where the voice (audio thread) picks up it's meanwhile hopefully created disk stream.
76
77 // Methods
78 void CreateStream(create_command_t& Command);
79 void DeleteStream(delete_command_t& Command);
80 void RefillStreams();
81 Stream::Handle CreateHandle();
82 Stream::OrderID_t CreateOrderID();
83 };
84
85 #endif // __DISKTHREAD_H__

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