Audaspace  1.6.0
A high level audio library.
SndFileReader.h
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16 
17 #pragma once
18 
19 #include "IReader.h"
20 
21 #ifdef LIBSNDFILE_PLUGIN
22 #define AUD_BUILD_PLUGIN
23 #endif
24 
31 #include "file/FileInfo.h"
32 
33 #include <string>
34 #include <sndfile.h>
35 #include <memory>
36 #include <vector>
37 
39 
40 class Buffer;
41 
46 {
47 private:
51  int m_position;
52 
56  int m_length;
57 
61  bool m_seekable;
62 
66  Specs m_specs;
67 
71  SNDFILE* m_sndfile;
72 
76  SF_VIRTUAL_IO m_vio;
77 
81  std::shared_ptr<Buffer> m_membuffer;
82 
86  int m_memoffset;
87 
88  // Functions for libsndfile virtual IO functionality
89  AUD_LOCAL static sf_count_t vio_get_filelen(void* user_data);
90  AUD_LOCAL static sf_count_t vio_seek(sf_count_t offset, int whence, void* user_data);
91  AUD_LOCAL static sf_count_t vio_read(void* ptr, sf_count_t count, void* user_data);
92  AUD_LOCAL static sf_count_t vio_tell(void* user_data);
93 
94  // delete copy constructor and operator=
95  SndFileReader(const SndFileReader&) = delete;
96  SndFileReader& operator=(const SndFileReader&) = delete;
97 
98 public:
106  SndFileReader(const std::string &filename);
107 
115  SndFileReader(std::shared_ptr<Buffer> buffer);
116 
120  virtual ~SndFileReader();
121 
127  virtual std::vector<StreamInfo> queryStreams();
128 
129  virtual bool isSeekable() const;
130  virtual void seek(int position);
131  virtual int getLength() const;
132  virtual int getPosition() const;
133  virtual Specs getSpecs() const;
134  virtual void read(int& length, bool& eos, sample_t* buffer);
135 };
136 
virtual int getLength() const =0
Returns an approximated length of the source in samples.
#define AUD_NAMESPACE_BEGIN
Opens the audaspace namespace aud.
Definition: Audaspace.h:116
This class represents a sound source as stream or as buffer which can be read for example by another ...
Definition: IReader.h:34
virtual void seek(int position)=0
Seeks to a specific position in the source.
virtual void read(int &length, bool &eos, sample_t *buffer)=0
Request to read the next length samples out of the source.
Specification of a sound source.
Definition: Specification.h:118
This class is a simple buffer in RAM which is 32 Byte aligned and provides resize functionality...
Definition: Buffer.h:33
virtual Specs getSpecs() const =0
Returns the specification of the reader.
This class reads a sound file via libsndfile.
Definition: SndFileReader.h:45
The IReader interface.
float sample_t
Sample type.(float samples)
Definition: Audaspace.h:126
The FileInfo data structures.
#define AUD_NAMESPACE_END
Closes the audaspace namespace aud.
Definition: Audaspace.h:119
virtual int getPosition() const =0
Returns the position of the source as a sample count value.
#define AUD_PLUGIN_API
Used for exporting symbols in the shared library.
Definition: Audaspace.h:94
virtual bool isSeekable() const =0
Tells whether the source provides seeking functionality or not.
#define AUD_LOCAL
Used for hiding symbols from export in the shared library.
Definition: Audaspace.h:80