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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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* Copyright (C) 2009 Grigor Iliev * |
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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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|
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#include "Stream.h" |
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#include "../../common/global_private.h" |
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|
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namespace LinuxSampler { namespace gig { |
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|
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Stream::Stream ( |
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::gig::buffer_t* pDecompressionBuffer, |
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uint BufferSize, |
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uint BufferWrapElements) : LinuxSampler::StreamBase< ::gig::DimensionRegion>(BufferSize, BufferWrapElements) |
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{ |
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this->pDecompressionBuffer = pDecompressionBuffer; |
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} |
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|
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long Stream::Read(uint8_t* pBuf, long SamplesToRead) { |
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::gig::Sample* pSample = pRegion->pSample; |
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long total_readsamples = 0, readsamples = 0; |
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bool endofsamplereached; |
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|
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// refill the disk stream buffer |
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if (this->DoLoop) { // honor looping |
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::gig::playback_state_t pbs; |
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pbs.position = PlaybackState.position; |
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pbs.reverse = PlaybackState.reverse; |
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pbs.loop_cycles_left = PlaybackState.loop_cycles_left; |
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|
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total_readsamples = pSample->ReadAndLoop(pBuf, SamplesToRead, &pbs, pRegion, pDecompressionBuffer); |
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PlaybackState.position = pbs.position; |
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PlaybackState.reverse = pbs.reverse; |
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PlaybackState.loop_cycles_left = pbs.loop_cycles_left; |
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endofsamplereached = (this->PlaybackState.position >= pSample->SamplesTotal); |
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dmsg(5,("Refilled stream %d with %d (SamplePos: %d)", this->hThis, total_readsamples, this->PlaybackState.position)); |
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} |
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else { // normal forward playback |
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|
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pSample->SetPos(this->SampleOffset); // recover old position |
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|
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do { |
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readsamples = pSample->Read(&pBuf[total_readsamples * pSample->FrameSize], SamplesToRead, pDecompressionBuffer); |
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SamplesToRead -= readsamples; |
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total_readsamples += readsamples; |
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} while (SamplesToRead && readsamples > 0); |
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|
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// we have to store the position within the sample, because other streams might use the same sample |
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this->SampleOffset = pSample->GetPos(); |
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|
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endofsamplereached = (SampleOffset >= pSample->SamplesTotal); |
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dmsg(5,("Refilled stream %d with %d (SamplePos: %d)", this->hThis, total_readsamples, this->SampleOffset)); |
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} |
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|
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// update stream state |
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if (endofsamplereached) SetState(state_end); |
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else SetState(state_active); |
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|
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return total_readsamples; |
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} |
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|
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void Stream::Launch ( |
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Stream::Handle hStream, |
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reference_t* pExportReference, |
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::gig::DimensionRegion* pRgn, |
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unsigned long SampleOffset, |
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bool DoLoop |
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) { |
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SampleDescription info; |
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info.ChannelsPerFrame = pRgn->pSample->Channels; |
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info.FrameSize = pRgn->pSample->FrameSize; |
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info.BytesPerSample = pRgn->pSample->BitDepth / 8; |
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info.TotalSampleCount = pRgn->pSample->SamplesTotal; |
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|
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Sample::PlaybackState playbackState; |
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playbackState.position = SampleOffset; |
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playbackState.reverse = false; |
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playbackState.loop_cycles_left = pRgn->pSample->LoopPlayCount; |
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|
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LinuxSampler::StreamBase< ::gig::DimensionRegion>::Launch ( |
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hStream, pExportReference, pRgn, info, playbackState, SampleOffset, DoLoop |
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); |
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} |
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|
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}} // namespace LinuxSampler::gig |