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Top Forums UNIX for Dummies Questions & Answers Extracting audio samples from raw file Post 302131601 by arunkumar_mca on Monday 13th of August 2007 12:04:56 AM
Old 08-13-2007
AS far i know .. The audio file files will contains a header which will tell about the information stored there ..So i think you cannot write that to text file .. Instead you can modifie the header and change the contemt of the file ..

Test Your Knowledge in Computers #408
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The Cygwin distribution contains thousands of packages from the Open Source world including most GNU tools, many BSD tools, an X server and a full set of X applications.
True or False?

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afGetFrameCount, afGetTrackBytes, afGetDataOffset - get the total sample frame count, length of audio track in bytes, offset of the audio track for a track in an audio file SYNOPSIS
#include <audiofile.h> AFframecount afGetFrameCount (AFfilehandle file, int track); AFfileoffset afGetTrackBytes (AFfilehandle file, int track); AFfileoffset afGetDataOffset (AFfilehandle file, int track); PARAMETERS
file is an audio file handle created by a previous call to afOpenFile(3). track is an integer which specifies an audio track within file. All supported file formats contain exactly one audio track per file, so the constant AF_DEFAULT_TRACK should always be used. DESCRIPTION
afGetFrameCount returns the total number of sample frames contained within the specified track of the specified file. Each sample frame of audio consists of a fixed number of samples (equal to the number of audio channels in the track. For monaural data, a sample frame consists of one audio sample. For stereophonic data, a sample frame consists of a stereo pair. afGetTrackBytes returns the total number of bytes of raw audio data (i.e., prior to decompression or conversion) in the track. afGetDataOffset returns the offset in bytes of the start of the audio data contained within the specified track of the specified file. RETURN VALUE
afGetFrameCount returns the total number of sample frames in track. afGetTrackBytes returns the total number of bytes of audio data in track. afGetDataOffset returns the offset in bytes to the beginning of the audio data in track. Each of these routines returns -1 in case of error. AUTHOR
Michael Pruett <> Audio File Library 0.3.6 03/06/2013 AFGETFRAMECOUNT(3)

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