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Diffstat (limited to 'muse_qt4_evolution/muse/ticksynth.cpp')
| -rw-r--r-- | muse_qt4_evolution/muse/ticksynth.cpp | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/muse_qt4_evolution/muse/ticksynth.cpp b/muse_qt4_evolution/muse/ticksynth.cpp new file mode 100644 index 00000000..861861de --- /dev/null +++ b/muse_qt4_evolution/muse/ticksynth.cpp @@ -0,0 +1,181 @@ +//============================================================================= +// MusE +// Linux Music Editor +// $Id:$ +// +// Copyright (C) 2002-2006 by Werner Schweer and others +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License version 2. +// +// 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., 675 Mass Ave, Cambridge, MA 02139, USA. +//============================================================================= + +#include "audio.h" +#include "ticksynth.h" +#include "default_click.h" + +SynthI* metronome = 0; + +class MetronomeSynth; +static MetronomeSynth* metronomeSynth; + +//--------------------------------------------------------- +// MetronomeSynth +//--------------------------------------------------------- + +class MetronomeSynth : public Synth { + public: + MetronomeSynth(const QFileInfo* fi) : Synth(fi, QString("Metronome")) {} + virtual ~MetronomeSynth() {} + virtual void incInstances(int) {} + virtual void* instantiate(); + virtual SynthIF* createSIF(SynthI*); + }; + +//--------------------------------------------------------- +// instantiate +//--------------------------------------------------------- + +void* MetronomeSynth::instantiate() + { + return 0; + } + +//--------------------------------------------------------- +// MetronomeSynthIF +//--------------------------------------------------------- + +class MetronomeSynthIF : public SynthIF + { + const float* data; + int pos; + int len; + void process(float** buffer, int offset, int n); + + public: + MetronomeSynthIF(SynthI* s) : SynthIF(s) { + data = 0; + } + virtual bool guiVisible() const { return false; } + virtual void showGui(bool) {} + virtual bool hasGui() const { return false; } + virtual void getGeometry(int*, int*, int*, int*) const {} + virtual void setGeometry(int, int, int, int) {} + virtual void getData(MidiEventList*, unsigned pos, int ports, unsigned n, float** buffer); + virtual bool putEvent(const MidiEvent& ev); + virtual MidiEvent receiveEvent() { return MidiEvent(); } + virtual int eventsPending() const { return 0; } + virtual int channels() const { return 1; } + virtual void deactivate2() {} + virtual void deactivate3() {} + virtual QString getPatchName(int, int, int) const { return ""; } + virtual QString getPatchName(int, int) { return ""; } + virtual void populatePatchPopup(QMenu*, int) {}; + virtual void write(Xml&) const {} + virtual void setParameter(int, float) {} + virtual int getControllerInfo(int, const char**, int*, int*, int*) { return 0; } + virtual bool hasAuxSend() const { return false; } + }; + +//--------------------------------------------------------- +// getData +//--------------------------------------------------------- + +void MetronomeSynthIF::getData(MidiEventList* el, unsigned pos, int/*ports*/, unsigned n, float** buffer) + { + unsigned curPos = pos; + unsigned endPos = pos + n; + unsigned off = pos; + + iMidiEvent i = el->begin(); + for (; i != el->end(); ++i) { + unsigned frame = i->time(); + if (frame >= endPos) + break; + if (frame > curPos) { + if (frame < pos) + printf("should not happen: missed event %d\n", pos -frame); + else + process(buffer, curPos-pos, frame - curPos); + curPos = frame; + } + putEvent(*i); + } + if (endPos - curPos) + process(buffer, curPos - off, endPos - curPos); + el->erase(el->begin(), i); + } + +//--------------------------------------------------------- +// putEvent +//--------------------------------------------------------- + +bool MetronomeSynthIF::putEvent(const MidiEvent& ev) + { + if (ev.dataA() == 0) { + data = defaultClickEmphasis; + len = defaultClickEmphasisLength; + } + else { + data = defaultClick; + len = defaultClickLength; + } + pos = 0; + return false; + } + +//--------------------------------------------------------- +// createSIF +//--------------------------------------------------------- + +SynthIF* MetronomeSynth::createSIF(SynthI* s) + { + return new MetronomeSynthIF(s); + } + +//--------------------------------------------------------- +// process +// synthesize n samples into buffer+offset +//--------------------------------------------------------- + +void MetronomeSynthIF::process(float** buffer, int offset, int n) + { + if (data == 0) { + memset(buffer[0], 0, n * sizeof(float)); + return; + } + const float* s = data + pos; + float* d = *buffer + offset; + int l = std::min(n, len); + int i; + for (i = 0; i < l; ++i) + *d++ = *s++; + for (; i < n; ++i) + *d++ = 0.0f; + pos += l; + len -= l; + if (len <= 0) + data = 0; + } + +//--------------------------------------------------------- +// initMetronome +//--------------------------------------------------------- + +void initMetronome() + { + QFileInfo fi; // dummy + metronomeSynth = new MetronomeSynth(&fi); + metronome = new SynthI(); + metronome->setName("metronome"); + metronome->initInstance(metronomeSynth); + } + |