uos

uos (United OpenLib of Sound) is a multi-platform package of audio handling routines that unifies the best open-source audio libraries.

Features

• play .mp3, .ogg, .wav, .flac, .m4a and cdrom audio files.
• 16, 32 or float 32 bit resolution
• record all types of input into file, in 16 or 32 bit resolution, mono or stereo.
• add DSP effects and filters, however many you want and record it.
• play multiple inputs and outputs simultaneously
• internet audio streaming

Uos can use the SoundTouch, PortAudio, SndFile, Mpg123, Faad and Mp4ff audio libraries.

Included in the package: Examples and binary libraries for Linux 32/64, Windows 32/64, Mac OSX 32 and FreeBSD 32/64.

Download

• http://fredvs.github.io/uos/
• http://github.com/fredvs/uos/

uoslib

uoslib is the Universal Library version of uos unit and is accessible from Pascal and all other languages (C, Java, ...)

Included in the package: Examples and binary libraries for Linux 32/64, Windows 32/64, Mac OSX 32 and FreeBSD 32/64.

• http://fredvs.github.io/uoslib/
• http://github.com/fredvs/uoslib/

Install

The best way to show how uos works is to look at the examples in uos/uoslib packages. All is included, you only have to compile the demos and run it...

Here some examples how to use uos :

• Copy all the files in /uos/src/ into the directory of your project.
• add uos_flat or uos in your uses section. (for uoslib add uoslib_h)
  • uos_flat => All is done by the unit. The procedures are more "universal", same syntax as uoslib.
  • uos => The application must declare uos class and variables. The procedures can be used as oop way.
• All the examples in uos packages uses uos_flat. There is a example using uos => SimplePlayer_noflat
• load libraries:
  • uos:

    uos_LoadLib(PortAudioFileName, SndFileFileName, Mpg123FileName, Mp4ffFileName, FaadFileName); /// full path of libraries

  • uoslib:

    uos_LoadLibs(uoslibFilename, PortAudioFileName, SndFileFileName, Mpg123FileName, Mp4ffFileName, FaadFileName); /// full path of libraries

Play a file 'MySong.mp3'

    // Create the player with uos
  uos_CreatePlayer( 0 );              // you may create how many players you want, from 0 to to what you computer can do...
  uos_AddIntoDevOut( 0 );             // Add Output with default parameters     
  uos_AddFromFile( 0, 'MySong.mp3' ); // Input from audio file 
    // And let's play it...
  uos_Play(0);                        // Play the song...

Play a sound file with some dsp effects (only for uos, in future for uoslib too):

  uos_CreatePlayer( 0 );              // First create the player:
  uos_AddIntoDevOut( 0 );             // Add Output with default parameters     
  uos_AddFromFile( 0, 'MySong.mp3' ); // Input from audio file 
  uos_AddDSPIn( 0, 1 );               // Add as many dsp effects you want
  uos_AddDSPIn( 0, 2 );
  uos_Play( 0 );                      // Play the song with DSP effect...

Listen to your mic into your loudspeakers (for uoslib too) :

  uos_CreatePlayer( 0 );     
  uos_AddIntoDevOut( 0 );   
  uos_AddFromDevIn( 0 );   // Input from IN Device
  uos_Play( 0 );           // Listen to your mic in your loudspeakers...

Now, ear your mic, listen to a mp3, apply some effects and record the mic into wav file at same time: </syntaxhighlight>

 uos_CreatePlayer( 0 );
 uos_AddIntoDevOut( 0 ) ;              // Output into OUT Device
 uos_AddIntoFile( 0, 'Myrecord.wav' ); // Output into OUT Device
 uos_AddFromDevIn( 0 );                // Input from IN Device
 uos_AddDSPIn( 0, 1 );                 // Add as many dsp's you want
 uos_AddDSPIn( 0, 2 );
 uos_CreatePlayer( 1 );
 uos_AddFromFile( 1, 'MySong.mp3' );  // the background audio file
 uos_AddIntoDevOut( 1 ) ;             // Output into OUT1 Device;

 uos_Play(0);                         // Listen your mic with DSP effects and record it ...
 uos_Play(1);                         // Listen to mp3 while recording

</syntaxhighlight>

Syntax

Here are the basic uos procedures. Each procedure has its equivalent with arguments for custom parameters.

Initialization Procedures:

uos_LoadLib; (uos_LoadLibs for uoslib)        //// Load dynamic libraries
uos_UnLoadLib;

Output

uos_AddIntoDevOut();         // Output into OUT Device
uos_AddIntoFile();           // Output into Wav File

Input

uos_AddFromDevIn();          // Input from IN device
uos_AddFromFile();           // Input from Audio File
uos_InputLength();           // Lenght of Input in samples
uos_InputPosition();         // Get position
uos_Seek();                  // Change position

Player

uos_Play();                 // Start playing
uos_RePlay();               // Resume playing after pause
uos_Stop();                 // Stop playing and free thread
uos_Pause();                // Pause playing

DSP

uos_AddDSPIn()               // DSP procedure for input
uos_AddDSPOut()              // DSP procedure for output
uos_SetDSPin()               // Set DSP In
uos_SetDSPout()              // Set DSP out
uos_SetDSPVolumeIn(...)      // Set Volume
uos_AddFilterIn(...)         // Add filer
uos_AddPlugin(...)           // Add pluggin

And much more other procedures/functions (see in uos.pas...)