engines/sfz/Stream.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck    *
 *   Copyright (C) 2005-2009 Christian Schoenebeck                         *
 *   Copyright (C) 2009 Grigor Iliev                                       *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#include <signal.h>


#include "Stream.h"
#include "../../common/global_private.h"

namespace LinuxSampler { namespace sfz {

    Stream::Stream (
        uint BufferSize,
        uint BufferWrapElements,
        ::sfz::SampleManager* pSampleManager
    ) : LinuxSampler::StreamBase< ::sfz::Region>(BufferSize, BufferWrapElements) {
        this->pSampleManager = pSampleManager;
    }

    long Stream::Read(uint8_t* pBuf, long SamplesToRead) {
        ::sfz::Sample* pSample = pRegion->pSample;
        long total_readsamples = 0, readsamples = 0;
        bool endofsamplereached;

        // refill the disk stream buffer
        if (this->DoLoop) { // honor looping
            total_readsamples  = pSample->ReadAndLoop(pBuf, SamplesToRead, &PlaybackState, pRegion);
            endofsamplereached = (this->PlaybackState.position >= pSample->GetTotalFrameCount());
            dmsg(5,("Refilled stream %d with %d (SamplePos: %d)", this->hThis, total_readsamples, this->PlaybackState.position));
        }
        else { // normal forward playback

            pSample->SetPos(this->SampleOffset); // recover old position

            do {
                readsamples        = pSample->Read(&pBuf[total_readsamples * pSample->GetFrameSize()], SamplesToRead);
                SamplesToRead     -= readsamples;
                total_readsamples += readsamples;
            } while (SamplesToRead && readsamples > 0);

            // we have to store the position within the sample, because other streams might use the same sample
            this->SampleOffset = pSample->GetPos();

            endofsamplereached = (SampleOffset >= pSample->GetTotalFrameCount());
            dmsg(5,("Refilled stream %d with %d (SamplePos: %d)", this->hThis, total_readsamples, this->SampleOffset));
        }

        // update stream state
        if (endofsamplereached) SetState(state_end);
        else                    SetState(state_active);

        return total_readsamples;
    }

    void Stream::Kill() {
        if(pRegion) pSampleManager->SetSampleNotInUse(pRegion->pSample, pRegion);
        StreamBase< ::sfz::Region>::Kill();
    }

    void Stream::Launch (
        Stream::Handle  hStream,
        reference_t*    pExportReference,
        ::sfz::Region*  pRgn,
        unsigned long   SampleOffset,
        bool            DoLoop
    ) {
        SampleDescription info;
        info.ChannelsPerFrame = pRgn->pSample->GetChannelCount();
        info.FrameSize        = pRgn->pSample->GetFrameSize();
        info.BytesPerSample   = pRgn->pSample->GetFrameSize() / pRgn->pSample->GetChannelCount();
        info.TotalSampleCount = pRgn->pSample->GetTotalFrameCount();

        Sample::PlaybackState playbackState;
        playbackState.position         = SampleOffset;
        playbackState.reverse          = false;
        playbackState.loop_cycles_left = 0; // TODO: pRgn->pSample->LoopPlayCount;

        if(pRgn) pSampleManager->SetSampleInUse(pRgn->pSample, pRgn);

        LinuxSampler::StreamBase< ::sfz::Region>::Launch (
            hStream, pExportReference, pRgn, info, playbackState, SampleOffset, DoLoop
        );
    }

}} // namespace LinuxSampler::sfz
1	/***************************************************************************
2	* *
3	* LinuxSampler - modular, streaming capable sampler *
4	* *
5	* Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck *
6	* Copyright (C) 2005-2009 Christian Schoenebeck *
7	* Copyright (C) 2009 Grigor Iliev *
8	* *
9	* This program is free software; you can redistribute it and/or modify *
10	* it under the terms of the GNU General Public License as published by *
11	* the Free Software Foundation; either version 2 of the License, or *
12	* (at your option) any later version. *
13	* *
14	* This program is distributed in the hope that it will be useful, *
15	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
17	* GNU General Public License for more details. *
18	* *
19	* You should have received a copy of the GNU General Public License *
20	* along with this program; if not, write to the Free Software *
21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
22	* MA 02111-1307 USA *
23	***************************************************************************/
24
25	#include <signal.h>
26
27
28	#include "Stream.h"
29	#include "../../common/global_private.h"
30
31	namespace LinuxSampler { namespace sfz {
32
33	Stream::Stream (
34	uint BufferSize,
35	uint BufferWrapElements,
36	::sfz::SampleManager* pSampleManager
37	) : LinuxSampler::StreamBase< ::sfz::Region>(BufferSize, BufferWrapElements) {
38	this->pSampleManager = pSampleManager;
39	}
40
41	long Stream::Read(uint8_t* pBuf, long SamplesToRead) {
42	::sfz::Sample* pSample = pRegion->pSample;
43	long total_readsamples = 0, readsamples = 0;
44	bool endofsamplereached;
45
46	// refill the disk stream buffer
47	if (this->DoLoop) { // honor looping
48	total_readsamples = pSample->ReadAndLoop(pBuf, SamplesToRead, &PlaybackState, pRegion);
49	endofsamplereached = (this->PlaybackState.position >= pSample->GetTotalFrameCount());
50	dmsg(5,("Refilled stream %d with %d (SamplePos: %d)", this->hThis, total_readsamples, this->PlaybackState.position));
51	}
52	else { // normal forward playback
53
54	pSample->SetPos(this->SampleOffset); // recover old position
55
56	do {
57	readsamples = pSample->Read(&pBuf[total_readsamples * pSample->GetFrameSize()], SamplesToRead);
58	SamplesToRead -= readsamples;
59	total_readsamples += readsamples;
60	} while (SamplesToRead && readsamples > 0);
61
62	// we have to store the position within the sample, because other streams might use the same sample
63	this->SampleOffset = pSample->GetPos();
64
65	endofsamplereached = (SampleOffset >= pSample->GetTotalFrameCount());
66	dmsg(5,("Refilled stream %d with %d (SamplePos: %d)", this->hThis, total_readsamples, this->SampleOffset));
67	}
68
69	// update stream state
70	if (endofsamplereached) SetState(state_end);
71	else SetState(state_active);
72
73	return total_readsamples;
74	}
75
76	void Stream::Kill() {
77	if(pRegion) pSampleManager->SetSampleNotInUse(pRegion->pSample, pRegion);
78	StreamBase< ::sfz::Region>::Kill();
79	}
80
81	void Stream::Launch (
82	Stream::Handle hStream,
83	reference_t* pExportReference,
84	::sfz::Region* pRgn,
85	unsigned long SampleOffset,
86	bool DoLoop
87	) {
88	SampleDescription info;
89	info.ChannelsPerFrame = pRgn->pSample->GetChannelCount();
90	info.FrameSize = pRgn->pSample->GetFrameSize();
91	info.BytesPerSample = pRgn->pSample->GetFrameSize() / pRgn->pSample->GetChannelCount();
92	info.TotalSampleCount = pRgn->pSample->GetTotalFrameCount();
93
94	Sample::PlaybackState playbackState;
95	playbackState.position = SampleOffset;
96	playbackState.reverse = false;
97	playbackState.loop_cycles_left = 0; // TODO: pRgn->pSample->LoopPlayCount;
98
99	if(pRgn) pSampleManager->SetSampleInUse(pRgn->pSample, pRgn);
100
101	LinuxSampler::StreamBase< ::sfz::Region>::Launch (
102	hStream, pExportReference, pRgn, info, playbackState, SampleOffset, DoLoop
103	);
104	}
105
106	}} // namespace LinuxSampler::sfz