qm-dsp 1.8
Framer.cpp
Go to the documentation of this file.
1/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
2
3/*
4 QM DSP Library
5
6 Centre for Digital Music, Queen Mary, University of London.
7 This file 2005-2006 Christian Landone.
8
9 This program is free software; you can redistribute it and/or
10 modify it under the terms of the GNU General Public License as
11 published by the Free Software Foundation; either version 2 of the
12 License, or (at your option) any later version. See the file
13 COPYING included with this distribution for more information.
14*/
15
16#include "Framer.h"
17#include <math.h>
18
20// Construction/Destruction
22
28
30{
31 if( m_dataFrame != NULL )
32 delete [] m_dataFrame;
33
34 if( m_strideFrame != NULL )
35 delete [] m_strideFrame;
36}
37
38void Framer::configure( unsigned int frameLength, unsigned int hop )
39{
40 m_frameLength = frameLength;
41 m_stepSize = hop;
42
44
45 if( m_dataFrame != NULL )
46 {
47 delete [] m_dataFrame;
49 }
50 m_dataFrame = new double[ m_frameLength ];
51
52 if( m_strideFrame != NULL )
53 {
54 delete [] m_strideFrame;
56 }
57 m_strideFrame = new double[ m_stepSize ];
58}
59
60void Framer::getFrame(double *dst)
61{
62
64 {
65 for( unsigned int u = 0; u < m_frameLength; u++)
66 {
67 dst[ u ] = m_srcBuffer[ m_ulSrcIndex++ ];
68 }
70 }
71 else
72 {
73 unsigned int rem = (m_ulSampleLen - m_ulSrcIndex );
74 unsigned int zero = m_frameLength - rem;
75
76 for( unsigned int u = 0; u < rem; u++ )
77 {
78 dst[ u ] = m_srcBuffer[ m_ulSrcIndex++ ];
79 }
80
81 for( unsigned int u = 0; u < zero; u++ )
82 {
83 dst[ rem + u ] = 0;
84 }
85
86 m_ulSrcIndex -= (( rem - m_stepSize ) );
87 }
88
90}
91
93{
94 m_framesRead = 0;
95 m_ulSrcIndex = 0;
96}
97
99{
100 return m_maxFrames;
101}
102
103void Framer::setSource(double *src, unsigned int length)
104{
105 m_srcBuffer = src;
106 m_ulSampleLen = length;
107
108 m_maxFrames = (unsigned int)ceil( (double)m_ulSampleLen/(double)m_stepSize ) ;
109}
#define NULL
Definition Filter.h:20
unsigned long m_ulSampleLen
Definition Framer.h:38
unsigned int m_maxFrames
Definition Framer.h:47
void resetCounters()
Definition Framer.cpp:92
double * m_dataFrame
Definition Framer.h:42
unsigned int m_stepSize
Definition Framer.h:45
void configure(unsigned int frameLength, unsigned int hop)
Definition Framer.cpp:38
void getFrame(double *dst)
Definition Framer.cpp:60
void setSource(double *src, unsigned int length)
Definition Framer.cpp:103
double * m_srcBuffer
Definition Framer.h:41
virtual ~Framer()
Definition Framer.cpp:29
double * m_strideFrame
Definition Framer.h:43
unsigned long m_ulSrcIndex
Definition Framer.h:49
unsigned int m_framesRead
Definition Framer.h:39
unsigned int getMaxNoFrames()
Definition Framer.cpp:98
Framer()
Definition Framer.cpp:23
unsigned int m_frameLength
Definition Framer.h:44