File: pvocmodifier.C

package info (click to toggle)
mixviews 1.10-3
  • links: PTS
  • area: main
  • in suites: hamm
  • size: 2,440 kB
  • ctags: 6,314
  • sloc: cpp: 31,647; ansic: 2,100; makefile: 1,782; sh: 17
file content (248 lines) | stat: -rw-r--r-- 7,678 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
// pvocmodifier.C

/******************************************************************************
 *
 *  MiXViews - an X window system based sound & data editor/processor
 *
 *  Copyright (c) 1993, 1994 Regents of the University of California
 *
 *  Author:     Douglas Scott
 *  Date:       December 13, 1994
 *
 *  Permission to use, copy and modify this software and its documentation
 *  for research and/or educational purposes and without fee is hereby granted,
 *  provided that the above copyright notice appear in all copies and that
 *  both that copyright notice and this permission notice appear in
 *  supporting documentation. The author reserves the right to distribute this
 *  software and its documentation.  The University of California and the author
 *  make no representations about the suitability of this software for any 
 *  purpose, and in no event shall University of California be liable for any
 *  damage, loss of data, or profits resulting from its use.
 *  It is provided "as is" without express or implied warranty.
 *
 ******************************************************************************/


#ifdef __GNUG__
#pragma implementation
#endif

#include "application.h"
#include "controller.h"
#include "envelope.h"
#include "pvocdata.h"
#include "pvocmodifier.h"
#include "request.h"
#include "valuerequester.h"

class SingleFactorRequester : public ValueRequester<double> {
	friend SpectrumTransposer;
	friend SpectrumStretcher;
protected:
	SingleFactorRequester(const char* title, const char* label,
	                      SingleFactorModifier* s);
	redefined void configureRequest(Request *);
	redefined boolean confirmValues();
protected:
	SingleFactorModifier* client;	                     
	double upperFreq;
	double lowerFreq;
	ChoiceValue useEnvelope;
};

SingleFactorRequester::SingleFactorRequester(const char* title,
                                             const char* label,
                                             SingleFactorModifier* s)
	: ValueRequester<double>(title, label, s->factor), client(s),
	  upperFreq(client->sampRate()/2.0), lowerFreq(0), useEnvelope(False) {}

void
SingleFactorRequester::configureRequest(Request* request) {
	ValueRequester<double>::configureRequest(request);
	Range allFreqs(0.0, client->sampRate()/2.0);
	request->appendValue("Modify Frequencies From:", &lowerFreq, allFreqs);
	request->appendValue("To:", &upperFreq, allFreqs);
	request->appendChoice("Use envelope for factor", "|No|Yes|",
	                      &useEnvelope, true);
}

boolean
SingleFactorRequester::confirmValues() {
	if(lowerFreq > upperFreq) {
		Application::alert("Invalid range:  upper must be > lower.");
		return false;
	}
	else {
		client->lowerBand = client->pvTarget()->getBandNumber(lowerFreq);
		client->upperBand = client->pvTarget()->getBandNumber(upperFreq);
	}
	if(useEnvelope == True) {
		if(client->envelope == nil) {
			Application::alert("No envelope is currently selected.");
			return false;
		}
	}
	else {
		Resource::unref(client->envelope);
		client->envelope = nil;		// to make sure it is not used
	}
	return client->checkFactor();
}

//********

SingleFactorModifier::SingleFactorModifier(Data* data, double facDefault)
		: PvocModifier(data), maxBand(pvTarget()->nBands() - 1),
		  envelope(nil), factor(facDefault) {}

SingleFactorModifier::~SingleFactorModifier() {
	Resource::unref(envelope);
}

boolean
SingleFactorModifier::configure(Controller *c) {
	envelope = (Envelope *) c->findSelection();
	return PvocModifier::configure(c);
}

void
SingleFactorModifier::initialize() {
	if(envelope != nil) {
		envelope->ref();
		if(!envelope->isA(EVP_Data)) {
			Envelope* evp = new Envelope(envelope->length());
			evp->copyFrom(envelope);
			Resource::unref(envelope);
			envelope = evp;
			envelope->ref();
		}
		envelope->setMappingLength(target()->length());
	}
	Super::initialize();
}

double
SingleFactorModifier::currentFactor() {
	return (envelope != nil) ?
		1.0 + envelope->next() * (factor - 1.0) :
		factor;
}

////////

SpectrumTransposer::SpectrumTransposer(Data* data)
	: SingleFactorModifier(data, 2.0) {}

Requester *
SpectrumTransposer::createRequester() {
	return new SingleFactorRequester(
		"Harmonically Shift (Transpose) Portion of Spectrum:",
		"Transposition factor:",
		this);
}

int
SpectrumTransposer::modifyFrame(Data* frame) {
	int fromBand = 0, eraseBand = 0;
	double factor = currentFactor();
	if(factor > 1.0) {			// moving spectrum towards nyquist
		int upperTargetBand = min(maxBand, round(upperBand * factor));
		int intoBand;
		for(intoBand = upperTargetBand; intoBand >= 0 ; intoBand--) {
			if((fromBand = round(intoBand / factor)) < lowerBand)
				break;
			frame->set(frame->get(fromBand, 0), intoBand, 0);
			frame->set(factor * frame->get(fromBand, 1), intoBand, 1);
		}
		// zero out portion of old range that doesnt overlap new
		for(eraseBand = min(upperBand, intoBand); eraseBand >= lowerBand;
				eraseBand--) {
			frame->set(0.0, eraseBand, 0);
			frame->set(0.0, eraseBand, 1);
		}
	}
	else if(factor < 1.0) {		// moving spectrum towards zero
		int intoBand;
		for(intoBand = lowerBand; intoBand <= upperBand; intoBand++) {
			if((fromBand = round(intoBand / factor)) > maxBand)
				break;
			frame->set(frame->get(fromBand, 0), intoBand, 0);
			frame->set(factor * frame->get(fromBand, 1), intoBand, 1);
		}
		// zero out portion of old range that doesnt overlap new
		for(eraseBand = max(lowerBand, intoBand); eraseBand <= upperBand;
				eraseBand++) {
			frame->set(0.0, eraseBand, 0);
			frame->set(0.0, eraseBand, 1);
		}
	}
	return true;
}

boolean
SpectrumTransposer::checkFactor() {
	return true;
}

////////

SpectrumStretcher::SpectrumStretcher(Data* data)
	: SingleFactorModifier(data, 2.0) {}

Requester *
SpectrumStretcher::createRequester() {
	return new SingleFactorRequester("Stretch/Shrink Portion of Spectrum:",
	                                 "Stretch factor:", this);
}

int
SpectrumStretcher::modifyFrame(Data* frame) {
	int fromBand = 0, eraseBand = 0;
	double factor = currentFactor();
	if(factor >= 1.0) {		// stretching spectrum upwards
		int upperTargetBand = min(maxBand, round(upperBand * factor));
		int totalBands = upperTargetBand - lowerBand;
		int intoBand;
		for(intoBand = upperTargetBand;  intoBand >= 0; intoBand--) {
			double fac = ((factor-1.)*(intoBand-lowerBand)/totalBands) + 1;
			if((fromBand = round(intoBand / fac)) < lowerBand)
				break;
			frame->set(frame->get(fromBand, 0), intoBand, 0);
			frame->set(fac * frame->get(fromBand, 1), intoBand, 1);
		}
		// zero out portion of old range that doesnt overlap new
		for(eraseBand = min(upperBand, intoBand); eraseBand >= lowerBand;
				eraseBand--) {
			frame->set(0.0, eraseBand, 0);
			frame->set(0.0, eraseBand, 1);
		}
	}
	else {					// compressing spectrum downwards
		int upperTargetBand = round(upperBand * factor);
		int totalBands = upperTargetBand - lowerBand;
		int intoBand;
		for(intoBand = lowerBand; intoBand <= upperBand; intoBand++) {
			double fac = 1. - ((1.-factor)*(intoBand-lowerBand)/totalBands);
			if((fromBand = round(intoBand / fac)) > maxBand)
				break;
			frame->set(frame->get(fromBand, 0), intoBand, 0);
			frame->set(fac * frame->get(fromBand, 1), intoBand, 1);
		}
		// zero out portion of old range that doesnt overlap new
		for(eraseBand = max(lowerBand, intoBand); eraseBand <= upperBand;
				eraseBand++) {
			frame->set(0.0, eraseBand, 0);
			frame->set(0.0, eraseBand, 1);
		}
	}
	return true;
}

boolean
SpectrumStretcher::checkFactor() {
	if(round(upperBand * factor) <= lowerBand) {
		Application::alert("Factor incompatible with given frequency range.");
		return false;
	}
	return true;
}