/[svn]/linuxsampler/trunk/src/engines/gig/DiskThread.h
ViewVC logotype

Contents of /linuxsampler/trunk/src/engines/gig/DiskThread.h

Parent Directory Parent Directory | Revision Log Revision Log


Revision 538 - (show annotations) (download) (as text)
Wed May 11 20:02:17 2005 UTC (18 years, 10 months ago) by schoenebeck
File MIME type: text/x-c++hdr
File size: 5847 byte(s)
just some cleanup

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 #include <gig.h>
34
35 #define REFILL_STREAMS_PER_RUN 4 ///< number of streams that should be refilled with each disk thread cycle
36 #define MIN_REFILL_SIZE 1024 ///< if no buffer was filled up more than this bottom limit, the disk thread will go to sleep
37 #define MAX_REFILL_SIZE 65536 ///< maximum of samples a buffer should be refilled in one cycle (256kB, as 16 bit stereo)
38 #define STREAM_BUFFER_SIZE 262144 ///< the diskstream ringbuffer size (512kB as sample_t is 16bit)
39 #define MAX_INPUT_STREAMS 90 ///< number of streams that should be allocated
40
41 #include "../../common/Thread.h"
42 #include "../../common/RingBuffer.h"
43 #include "Stream.h"
44 #include "Voice.h"
45
46 namespace LinuxSampler { namespace gig {
47
48 int CompareStreamWriteSpace(const void* a, const void* b);
49
50 class DiskThread : public Thread {
51 public:
52 // Methods
53 DiskThread(uint BufferWrapElements);
54 virtual ~DiskThread();
55 void Reset();
56 String GetBufferFillBytes();
57 String GetBufferFillPercentage();
58 int OrderNewStream(Stream::reference_t* pStreamRef, ::gig::Sample* pSample, unsigned long SampleOffset, bool DoLoop);
59 int OrderDeletionOfStream(Stream::reference_t* pStreamRef);
60 Stream* AskForCreatedStream(Stream::OrderID_t StreamOrderID);
61
62 // the number of streams currently in usage
63 // printed on the console the main thread (along with the active voice count)
64 int ActiveStreamCount;
65 int ActiveStreamCountMax;
66
67 protected:
68 ::gig::buffer_t DecompressionBuffer; ///< Used for thread safe streaming.
69
70 int Main(); ///< Implementation of virtual method from class Thread
71
72 friend class Stream;
73 private:
74 // Private Types
75 struct create_command_t {
76 Stream::OrderID_t OrderID;
77 Stream::Handle hStream;
78 Stream::reference_t* pStreamRef;
79 ::gig::Sample* pSample;
80 unsigned long SampleOffset;
81 bool DoLoop;
82 };
83 struct delete_command_t {
84 Stream* pStream;
85 Stream::Handle hStream;
86 Stream::OrderID_t OrderID;
87 };
88
89 // Attributes
90 bool IsIdle;
91 uint Streams;
92 RingBuffer<create_command_t>* CreationQueue; ///< Contains commands to create streams
93 RingBuffer<delete_command_t>* DeletionQueue; ///< Contains commands to delete streams
94 RingBuffer<Stream::Handle>* GhostQueue; ///< Contains handles to streams that are not used anymore and weren't deletable immediately
95 unsigned int RefillStreamsPerRun; ///< How many streams should be refilled in each loop run
96 Stream* pStreams[MAX_INPUT_STREAMS]; ///< Contains all disk streams (wether used or unused)
97 Stream* pCreatedStreams[MAX_INPUT_STREAMS + 1]; ///< This is where the voice (audio thread) picks up it's meanwhile hopefully created disk stream.
98 static Stream* SLOT_RESERVED; ///< This value is used to mark an entry in pCreatedStreams[] as reserved.
99
100 // Methods
101 void CreateStream(create_command_t& Command);
102 void DeleteStream(delete_command_t& Command);
103 void RefillStreams();
104 Stream::Handle CreateHandle();
105 Stream::OrderID_t CreateOrderID();
106 };
107
108 }} // namespace LinuxSampler::gig
109
110 #endif // __LS_GIG_DISKTHREAD_H__

  ViewVC Help
Powered by ViewVC