Audaspace  1.3.0
A high level audio library.
JOSResampleReader.h
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16 
17 #pragma once
18 
25 #include "respec/ResampleReader.h"
26 #include "util/Buffer.h"
27 
29 
34 {
35 private:
36  typedef void (JOSResampleReader::*resample_f)(double target_factor, int length, sample_t* buffer);
37 
41  static const int m_len;
42 
46  static const int m_L;
47 
51  static const float m_coeff[];
52 
56  Channels m_channels;
57 
61  unsigned int m_n;
62 
66  double m_P;
67 
71  Buffer m_buffer;
72 
76  Buffer m_sums;
77 
81  int m_cache_valid;
82 
86  resample_f m_resample;
87 
91  double m_last_factor;
92 
93  // delete copy constructor and operator=
94  JOSResampleReader(const JOSResampleReader&) = delete;
95  JOSResampleReader& operator=(const JOSResampleReader&) = delete;
96 
100  void AUD_LOCAL reset();
101 
108  void AUD_LOCAL updateBuffer(int size, double factor, int samplesize);
109 
110  void AUD_LOCAL resample(double target_factor, int length, sample_t* buffer);
111  void AUD_LOCAL resample_mono(double target_factor, int length, sample_t* buffer);
112  void AUD_LOCAL resample_stereo(double target_factor, int length, sample_t* buffer);
113 
114 public:
120  JOSResampleReader(std::shared_ptr<IReader> reader, SampleRate rate);
121 
122  virtual void seek(int position);
123  virtual int getLength() const;
124  virtual int getPosition() const;
125  virtual Specs getSpecs() const;
126  virtual void read(int& length, bool& eos, sample_t* buffer);
127 };
128 
Specs
Specification of a sound source.
Definition: Specification.h:110
SampleRate
double SampleRate
Sample rate type.
Definition: Specification.h:106
JOSResampleReader
This resampling reader uses Julius O.
Definition: JOSResampleReader.h:34
JOSResampleReader::read
virtual void read(int &length, bool &eos, sample_t *buffer)
Request to read the next length samples out of the source.
JOSResampleReader::getPosition
virtual int getPosition() const
Returns the position of the source as a sample count value.
JOSResampleReader::getLength
virtual int getLength() const
Returns an approximated length of the source in samples.
ResampleReader
This is the base class for all resampling readers.
Definition: ResampleReader.h:33
Channels
Channels
The channel count.
Definition: Specification.h:59
JOSResampleReader::getSpecs
virtual Specs getSpecs() const
Returns the specification of the reader.
Buffer.h
The Buffer class.
AUD_LOCAL
#define AUD_LOCAL
Used for hiding symbols from export in the shared library.
Definition: Audaspace.h:80
JOSResampleReader::JOSResampleReader
JOSResampleReader(std::shared_ptr< IReader > reader, SampleRate rate)
Creates a resampling reader.
Buffer
This class is a simple buffer in RAM which is 32 Byte aligned and provides resize functionality.
Definition: Buffer.h:34
AUD_NAMESPACE_END
#define AUD_NAMESPACE_END
Closes the audaspace namespace aud.
Definition: Audaspace.h:119
ResampleReader.h
The ResampleReader class.
sample_t
float sample_t
Sample type.(float samples)
Definition: Audaspace.h:126
JOSResampleReader::seek
virtual void seek(int position)
Seeks to a specific position in the source.
AUD_NAMESPACE_BEGIN
#define AUD_NAMESPACE_BEGIN
Opens the audaspace namespace aud.
Definition: Audaspace.h:116
AUD_API
#define AUD_API
Used for exporting symbols in the shared library.
Definition: Audaspace.h:93