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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 - 2009 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_private.h" |
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#include <gig.h> |
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#include "../../common/Thread.h" |
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#include "../../common/RingBuffer.h" |
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#include "../../common/atomic.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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int CompareStreamWriteSpace(const void* a, const void* b); |
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/** @brief Disk Reader Thread |
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* |
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* The disk reader thread is responsible for periodically refilling |
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* disk streams in parallel to the audio thread's rendering process. |
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* |
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* There is also a function for releasing parts of instruments not |
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* in use anymore (as this is not real time safe, the audio thread |
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* cannot do it directly). |
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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(int MaxStreams, uint BufferWrapElements, InstrumentResourceManager* pInstruments); |
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virtual ~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::DimensionRegion* pDimRgn, unsigned long SampleOffset, bool DoLoop); |
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int OrderDeletionOfStream(Stream::reference_t* pStreamRef, bool bRequestNotification = false); |
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int OrderDeletionOfDimreg(::gig::DimensionRegion* dimreg); |
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Stream* AskForCreatedStream(Stream::OrderID_t StreamOrderID); |
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Stream::Handle AskForDeletedStream(); |
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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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uint GetActiveStreamCount() { return atomic_read(&ActiveStreamCount); } |
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void SetActiveStreamCount(uint Streams) { atomic_set(&ActiveStreamCount, Streams); } |
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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::DimensionRegion* pDimRgn; |
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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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bool bNotify; |
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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,false>* CreationQueue; ///< Contains commands to create streams |
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RingBuffer<delete_command_t,false>* DeletionQueue; ///< Contains commands to delete streams |
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RingBuffer<delete_command_t,false>* GhostQueue; ///< Contains handles to streams that are not used anymore and weren't deletable immediately |
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RingBuffer<Stream::Handle,false> DeletionNotificationQueue; ///< In case the original sender requested a notification for its stream deletion order, this queue will receive the handle of the respective stream once actually be deleted by the disk thread. |
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RingBuffer< ::gig::DimensionRegion*,false>* DeleteDimregQueue; ///< Contains dimension regions that are not used anymore and should be handed back to the instrument resource manager |
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unsigned int RefillStreamsPerRun; ///< How many streams should be refilled in each loop run |
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Stream** pStreams; ///< Contains all disk streams (whether used or unused) |
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Stream** pCreatedStreams; ///< 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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InstrumentResourceManager* pInstruments; ///< The instrument resource manager of the engine that is using this disk thread. Used by the dimension region deletion feature. |
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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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atomic_t ActiveStreamCount; |
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}; |
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}} // namespace LinuxSampler::gig |
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#endif // __LS_GIG_DISKTHREAD_H__ |
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