/[svn]/linuxsampler/trunk/src/engines/gig/DiskThread.h
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Contents of /linuxsampler/trunk/src/engines/gig/DiskThread.h

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Revision 502 - (show annotations) (download) (as text)
Fri Apr 29 14:20:22 2005 UTC (18 years, 11 months ago) by letz
File MIME type: text/x-c++hdr
File size: 6000 byte(s)
Fix destructor

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 * Copyright (C) 2005 Christian Schoenebeck *
7 * *
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_DISKTHREAD_H__
25 #define __LS_GIG_DISKTHREAD_H__
26
27 #include "../../common/global.h"
28
29 #if DEBUG_HEADERS
30 # warning DiskThread.h included
31 #endif // DEBUG_HEADERS
32
33 #define REFILL_STREAMS_PER_RUN 4 ///< number of streams that should be refilled with each disk thread cycle
34 #define MIN_REFILL_SIZE 1024 ///< if no buffer was filled up more than this bottom limit, the disk thread will go to sleep
35 #define MAX_REFILL_SIZE 65536 ///< maximum of samples a buffer should be refilled in one cycle (256kB, as 16 bit stereo)
36
37
38 //#define STREAM_BUFFER_SIZE 131072 ///< the diskstream ringbuffer size (256kB as sample_t is 16bit)
39
40 #define STREAM_BUFFER_SIZE 262144
41 //#define MAX_INPUT_STREAMS 150 ///< number of streams that should be allocated
42
43 #define MAX_INPUT_STREAMS 90 ///< number of streams that should be allocated
44
45
46 #include "../../common/Thread.h"
47 #include "../../common/RingBuffer.h"
48 #include "../../lib/fileloader/libgig/gig.h"
49 #include "Stream.h"
50 #include "Voice.h"
51
52 namespace LinuxSampler { namespace gig {
53
54 int CompareStreamWriteSpace(const void* a, const void* b);
55
56 class DiskThread : public Thread {
57 public:
58 // Methods
59 DiskThread(uint BufferWrapElements);
60 virtual ~DiskThread();
61 void Reset();
62 String GetBufferFillBytes();
63 String GetBufferFillPercentage();
64 int OrderNewStream(Stream::reference_t* pStreamRef, ::gig::Sample* pSample, unsigned long SampleOffset, bool DoLoop);
65 int OrderDeletionOfStream(Stream::reference_t* pStreamRef);
66 Stream* AskForCreatedStream(Stream::OrderID_t StreamOrderID);
67
68 // the number of streams currently in usage
69 // printed on the console the main thread (along with the active voice count)
70 int ActiveStreamCount;
71 int ActiveStreamCountMax;
72
73 protected:
74 ::gig::buffer_t DecompressionBuffer; ///< Used for thread safe streaming.
75
76 int Main(); ///< Implementation of virtual method from class Thread
77
78 friend class Stream;
79 private:
80 // Private Types
81 struct create_command_t {
82 Stream::OrderID_t OrderID;
83 Stream::Handle hStream;
84 Stream::reference_t* pStreamRef;
85 ::gig::Sample* pSample;
86 unsigned long SampleOffset;
87 bool DoLoop;
88 };
89 struct delete_command_t {
90 Stream* pStream;
91 Stream::Handle hStream;
92 Stream::OrderID_t OrderID;
93 };
94
95 // Attributes
96 bool IsIdle;
97 uint Streams;
98 RingBuffer<create_command_t>* CreationQueue; ///< Contains commands to create streams
99 RingBuffer<delete_command_t>* DeletionQueue; ///< Contains commands to delete streams
100 RingBuffer<Stream::Handle>* GhostQueue; ///< Contains handles to streams that are not used anymore and weren't deletable immediately
101 unsigned int RefillStreamsPerRun; ///< How many streams should be refilled in each loop run
102 Stream* pStreams[MAX_INPUT_STREAMS]; ///< Contains all disk streams (wether used or unused)
103 Stream* pCreatedStreams[MAX_INPUT_STREAMS + 1]; ///< This is where the voice (audio thread) picks up it's meanwhile hopefully created disk stream.
104 static Stream* SLOT_RESERVED; ///< This value is used to mark an entry in pCreatedStreams[] as reserved.
105
106 // Methods
107 void CreateStream(create_command_t& Command);
108 void DeleteStream(delete_command_t& Command);
109 void RefillStreams();
110 Stream::Handle CreateHandle();
111 Stream::OrderID_t CreateOrderID();
112 };
113
114 }} // namespace LinuxSampler::gig
115
116 #endif // __LS_GIG_DISKTHREAD_H__

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