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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
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* Copyright (C) 2005 Christian Schoenebeck * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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#ifndef __LS_GIG_DISKTHREAD_H__ |
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#define __LS_GIG_DISKTHREAD_H__ |
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#include "../../common/global.h" |
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|
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#if DEBUG_HEADERS |
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# warning DiskThread.h included |
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#endif // DEBUG_HEADERS |
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#define REFILL_STREAMS_PER_RUN 4 ///< number of streams that should be refilled with each disk thread cycle |
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#define MIN_REFILL_SIZE 1024 ///< if no buffer was filled up more than this bottom limit, the disk thread will go to sleep |
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#define MAX_REFILL_SIZE 65536 ///< maximum of samples a buffer should be refilled in one cycle (256kB, as 16 bit stereo) |
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#define STREAM_BUFFER_SIZE 131072 ///< the diskstream ringbuffer size (256kB as sample_t is 16bit) |
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#define MAX_INPUT_STREAMS 150 ///< number of streams that should be allocated |
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|
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#include "../../common/Thread.h" |
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#include "../../common/RingBuffer.h" |
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#include "../../lib/fileloader/libgig/gig.h" |
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#include "Stream.h" |
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#include "Voice.h" |
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|
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namespace LinuxSampler { namespace gig { |
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|
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int CompareStreamWriteSpace(const void* a, const void* b); |
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|
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class DiskThread : public Thread { |
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public: |
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// Methods |
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DiskThread(uint BufferWrapElements); |
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~DiskThread(); |
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void Reset(); |
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String GetBufferFillBytes(); |
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String GetBufferFillPercentage(); |
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int OrderNewStream(Stream::reference_t* pStreamRef, ::gig::Sample* pSample, unsigned long SampleOffset, bool DoLoop); |
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int OrderDeletionOfStream(Stream::reference_t* pStreamRef); |
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Stream* AskForCreatedStream(Stream::OrderID_t StreamOrderID); |
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|
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// the number of streams currently in usage |
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// printed on the console the main thread (along with the active voice count) |
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int ActiveStreamCount; |
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int ActiveStreamCountMax; |
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|
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protected: |
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::gig::buffer_t DecompressionBuffer; ///< Used for thread safe streaming. |
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|
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int Main(); ///< Implementation of virtual method from class Thread |
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|
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friend class Stream; |
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private: |
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// Private Types |
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struct create_command_t { |
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Stream::OrderID_t OrderID; |
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Stream::Handle hStream; |
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Stream::reference_t* pStreamRef; |
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::gig::Sample* pSample; |
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unsigned long SampleOffset; |
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bool DoLoop; |
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}; |
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struct delete_command_t { |
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Stream* pStream; |
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Stream::Handle hStream; |
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Stream::OrderID_t OrderID; |
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}; |
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|
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// Attributes |
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bool IsIdle; |
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uint Streams; |
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RingBuffer<create_command_t>* CreationQueue; ///< Contains commands to create streams |
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RingBuffer<delete_command_t>* DeletionQueue; ///< Contains commands to delete streams |
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RingBuffer<Stream::Handle>* GhostQueue; ///< Contains handles to streams that are not used anymore and weren't deletable immediately |
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unsigned int RefillStreamsPerRun; ///< How many streams should be refilled in each loop run |
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Stream* pStreams[MAX_INPUT_STREAMS]; ///< Contains all disk streams (wether used or unused) |
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Stream* pCreatedStreams[MAX_INPUT_STREAMS + 1]; ///< This is where the voice (audio thread) picks up it's meanwhile hopefully created disk stream. |
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static Stream* SLOT_RESERVED; ///< This value is used to mark an entry in pCreatedStreams[] as reserved. |
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|
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// Methods |
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void CreateStream(create_command_t& Command); |
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void DeleteStream(delete_command_t& Command); |
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void RefillStreams(); |
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Stream::Handle CreateHandle(); |
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Stream::OrderID_t CreateOrderID(); |
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}; |
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}} // namespace LinuxSampler::gig |
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#endif // __LS_GIG_DISKTHREAD_H__ |
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