Audaspace  1.6.0
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_high;
45  static const int m_len_medium;
49  static const int m_len_low;
53  static const int m_L_high;
57  static const int m_L_medium;
61  static const int m_L_low;
65  static const float m_coeff_high[];
69  static const float m_coeff_medium[];
73  static const float m_coeff_low[];
74 
78  int m_len;
79 
83  int m_L;
84 
88  const float* m_coeff;
89 
93  Channels m_channels;
94 
98  unsigned int m_n;
99 
103  double m_P;
104 
108  Buffer m_buffer;
109 
113  Buffer m_sums;
114 
118  int m_cache_valid;
119 
123  resample_f m_resample;
124 
128  double m_last_factor;
129 
130  // delete copy constructor and operator=
131  JOSResampleReader(const JOSResampleReader&) = delete;
132  JOSResampleReader& operator=(const JOSResampleReader&) = delete;
133 
137  void AUD_LOCAL reset();
138 
145  void AUD_LOCAL updateBuffer(int size, double factor, int samplesize);
146 
147  void AUD_LOCAL resample_generic(double target_factor, int length, sample_t* buffer);
148  void AUD_LOCAL resample_mono(double target_factor, int length, sample_t* buffer);
149  void AUD_LOCAL resample_stereo(double target_factor, int length, sample_t* buffer);
150 
151  template <typename T>
152  void AUD_LOCAL resample(double target_factor, int length, sample_t* buffer);
153 
154 public:
155 
161  JOSResampleReader(std::shared_ptr<IReader> reader, SampleRate rate, ResampleQuality quality = ResampleQuality::HIGH);
162 
163  virtual void seek(int position);
164  virtual int getLength() const;
165  virtual int getPosition() const;
166  virtual Specs getSpecs() const;
167  virtual void read(int& length, bool& eos, sample_t* buffer);
168 };
169 
#define AUD_NAMESPACE_BEGIN
Opens the audaspace namespace aud.
Definition: Audaspace.h:116
virtual Specs getSpecs() const
Returns the specification of the reader.
Channels
The channel count.
Definition: Specification.h:58
#define AUD_API
Used for exporting symbols in the shared library.
Definition: Audaspace.h:93
Specification of a sound source.
Definition: Specification.h:118
double SampleRate
Sample rate type.
Definition: Specification.h:115
virtual int getLength() const
Returns an approximated length of the source in samples.
This class is a simple buffer in RAM which is 32 Byte aligned and provides resize functionality...
Definition: Buffer.h:33
This resampling reader uses Julius O.
Definition: JOSResampleReader.h:33
virtual void seek(int position)
Seeks to a specific position in the source.
JOS resample at medium quality preset.
float sample_t
Sample type.(float samples)
Definition: Audaspace.h:126
ResampleQuality
Resampling algorithm and quality.
Definition: Specification.h:87
This is the base class for all resampling readers.
Definition: ResampleReader.h:32
#define AUD_NAMESPACE_END
Closes the audaspace namespace aud.
Definition: Audaspace.h:119
virtual int getPosition() const
Returns the position of the source as a sample count value.
The ResampleReader class.
#define AUD_LOCAL
Used for hiding symbols from export in the shared library.
Definition: Audaspace.h:80
virtual void read(int &length, bool &eos, sample_t *buffer)
Request to read the next length samples out of the source.
The Buffer class.