itpp::SND_In_File Class Reference

Class to read audio data from au file. More...

#include <itpp/srccode/audiofile.h>

Public Member Functions
	SND_In_File ()
	Default constructor - creates uninitialized stream.
	SND_In_File (const char *fname)
	Constructor from file name fname.
	~SND_In_File ()
	Stream destructor.
bool	open (const char *fname)
	Open the file fname.
void	close ()
	Close the file.
Audio_Stream_Description	get_description () const
	Get stream description.
bool	seek_read (std::streamoff pos)
	Go to sample number pos.
std::streamoff	tell_read ()
	Get current position in samples.
std::streamoff	num_samples () const
	Get number of samples in stream.
bool	read_sample (double &s, int ch=0)
	Read single sample s at current position to channel ch.
vec	read_channel (int n, int ch=0)
	Read n samples from channel ch starting at current position.
mat	read (int n)
	Read n samples from all channels starting at current position into matrix.

Detailed Description

Class to read audio data from au file.

Input stream of audio samples uses binary stream to get encoded audio data from snd audio file. Audio can be read as single sample from current read position in audio stream, as a vector of samples containing data from single audio channel or as matrix with audio channels stored columnwise.

Following example illustratates read operations with SND_In_File

#include <itpp/srccode/audiofile.h>
using namespace itpp;

int main() {
  //create audio stream
  SND_In_File f_in("inptut.au");
  //get description
  Audio_Stream_Description d = f_in.get_description();
  //read 100 audio samples if file contains stereo data on 8 kHz sampling rate
  mat in(100,2); vec first_channel(100); vec second_channel(100);
  if((d.get_num_channels == 2) && (d.get_sampling_rate() == 8000) && (f_in.num_samples()>=100))
  {
     in = f_in.read(100);
     f_in.seek_read(0); //reposition to the first sample
     first_channel = f_in.read_channel(100); //read first channel
     f_in.seek_read(0); //reposition to the first sample
     second_channel = f_in.read_channel(100,1); //read second channel
  }
  return 0;
}

Definition at line 176 of file audiofile.h.

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The documentation for this class was generated from the following file:

• itpp/srccode/audiofile.h