comparison examples/PowerSpectrum.h @ 241:70e6826adc64

* Add Power Spectrum example plugin
author cannam
date Mon, 10 Nov 2008 17:28:54 +0000
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240:7b90fe049d04 241:70e6826adc64
1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
2
3 /*
4 Vamp
5
6 An API for audio analysis and feature extraction plugins.
7
8 Centre for Digital Music, Queen Mary, University of London.
9 Copyright 2006 Chris Cannam.
10
11 Permission is hereby granted, free of charge, to any person
12 obtaining a copy of this software and associated documentation
13 files (the "Software"), to deal in the Software without
14 restriction, including without limitation the rights to use, copy,
15 modify, merge, publish, distribute, sublicense, and/or sell copies
16 of the Software, and to permit persons to whom the Software is
17 furnished to do so, subject to the following conditions:
18
19 The above copyright notice and this permission notice shall be
20 included in all copies or substantial portions of the Software.
21
22 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
26 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
27 CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29
30 Except as contained in this notice, the names of the Centre for
31 Digital Music; Queen Mary, University of London; and Chris Cannam
32 shall not be used in advertising or otherwise to promote the sale,
33 use or other dealings in this Software without prior written
34 authorization.
35 */
36
37 #ifndef _POWER_SPECTRUM_PLUGIN_H_
38 #define _POWER_SPECTRUM_PLUGIN_H_
39
40 #include "vamp-sdk/Plugin.h"
41
42 /**
43 * Example plugin that returns a power spectrum calculated (trivially)
44 * from the frequency domain representation of each block of audio.
45 * This is one of the simplest possible Vamp plugins, included as an
46 * example of how to return the appropriate value structure for this
47 * sort of visualisation.
48 */
49
50 class PowerSpectrum : public Vamp::Plugin
51 {
52 public:
53 PowerSpectrum(float inputSampleRate);
54 virtual ~PowerSpectrum();
55
56 bool initialise(size_t channels, size_t stepSize, size_t blockSize);
57 void reset();
58
59 InputDomain getInputDomain() const { return FrequencyDomain; }
60
61 std::string getIdentifier() const;
62 std::string getName() const;
63 std::string getDescription() const;
64 std::string getMaker() const;
65 int getPluginVersion() const;
66 std::string getCopyright() const;
67
68 OutputList getOutputDescriptors() const;
69
70 FeatureSet process(const float *const *inputBuffers,
71 Vamp::RealTime timestamp);
72
73 FeatureSet getRemainingFeatures();
74
75 protected:
76 size_t m_blockSize;
77 };
78
79
80 #endif