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3D Audio Engine Based on Openal
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CMake Linux compat changes. Dec 27, 2011
Dependencies Last fix May 22, 2011
Dependencies64 Last fix May 22, 2011
DependenciesSource
Examples
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cAudio Fix that fixes threading on Linux. Feb 19, 2012
cAudioCSharp * Make it easier to playback AudioCaptureBuffer Jun 26, 2011
cAudioCSharpWrapper
.gitignore Converting svn ignore to git ignore Jul 19, 2011
CMakeLists.txt Updating cmakelist to reflect directory rename. Aug 24, 2011
License.txt
README.md Updated readme with some problems reported by Thijs Feb 17, 2012

README.md

Version 2.2.0 dev

This is the new cAudio 2.2.0 Dev . This release is mainly a bug fix release.

Visit our site at http://caudio.deathtouchstudios.com/ for news and information.

To get help, report bugs, or talk about cAudio visit our forums at: http://www.memoryoffset.com/forum

Change log

  • C# Bindings as well has tutorials and demo application
  • CMake Build System
  • Remove unneeded mutex/locks from dataFactory->CreateDataSource
  • Replace include guards with #pragma once
  • Bug fixes,
  • cAudio Source are now cleared

Compiling

Windows

To compile:

Install CMake if you don't already have it. http://www.cmake.org/cmake/resources/software.html

To generate makefiles use: cmake . -DCAUDIO_DEPENDENCIES <Path to the Dependencies folder>. You can also use the graphical CMake utility and set the option in the list before you run generate.

Linux

This is the build steps for building on a cleanly installed Ubuntu 11.10 system. Other systems should be similar and the build easy to adapt. If you run in to problems post an issue here and if you adapt these steps for another Linux distribution please contribute the information back so it can be included here. Solutions for common problems can be found after the build description.

  • First we need some basic build tools. The command sudo apt-get install build-essential git cmake will set you up with all you need for this build.

  • Then lets get some place for the project to live. mkdir -p ~/Documents/projects will set up what I use as a root for all my projects. (You can, of cause, choose any directory you like for this. The GIT command will make a cAudio sub directory for you so you don't have to make that.) Lets move in to the new directory cd ~/Documents/projects.

  • Next step is to clone the Github repo for cAudio. Just run git clone https://github.com/wildicv/cAudio.git to get your local copy of the source.

  • When the clone is done move in to the new directory cd cAudio/CMake.

  • Install the libraries needed for cAudio to build sudo apt-get install libopenal-dev libogg-dev. This will get you the OpenAL and OGG development files (headers and binaries).

  • You are now all set to generate the project of your choice. CMake defaults to unix makefiles but you can specify another with the -G switch. Run cmake ../ -DCAUDIO_DEPENDENCIES_DIR=../Dependencies/ for a 32bit build or cmake ../ -DCAUDIO_DEPENDENCIES_DIR=../Dependencies64/ for a 64bit build.

  • If CMake exits cleanly, run make -j4 (The -j switch means 'jobs' and tells make how many threads to run. Twice the number of cores you have is recommended.) The project will now build and you can run an optional sudo make install to install the build .so files and headers system wide.

Common problems and solutions

Here is a collection of problems and solutions that have come up while compiling on Linux

Errors on config_types.h

On older versions of Linux you might get errors like:

In file included from /home/thijs/Downloads/cAudio/DependenciesSource/libogg-1.2.2/include/ogg/os_types.h:143,
                 from /home/thijs/Downloads/cAudio/DependenciesSource/libogg-1.2.2/include/ogg/ogg.h:25,
                 from /home/thijs/Downloads/cAudio/DependenciesSource/libvorbis-1.3.2/src/analysis.c:21:
/usr/include/ogg/config_types.h:5: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘ogg_int16_t’
/usr/include/ogg/config_types.h:6: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘ogg_uint16_t’
/usr/include/ogg/config_types.h:7: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘ogg_int32_t’
/usr/include/ogg/config_types.h:8: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘ogg_uint32_t’
/usr/include/ogg/config_types.h:9: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘ogg_int64_t’

If you do it's an indication that your version of libogg is to old. The version required to function with cAudio is, probably, 1.2.0 or higher (the build described here uses 1.2.2). Try finding updated packages (on Ubuntu the packages are libogg0 and libogg-dev) for your distribution or build it from source that you'll find at http://xiph.org/downloads/ ...

Building libogg from source is a simple process, it's a small library. Just follow the normal path of:

  1. Download sources
  2. Unpack the downloaded tar.gz somewhere
  3. Change to the directory with the unpacked source
  4. ./configure
  5. make
  6. make install (as root)

Music stops after about one second

This is due to the fact that cAudio on Linux fails to build with proper threading enabled (see issue #8 https://github.com/wildicv/cAudio/issues/8).

To solve the problem you have to manually update cAudio's audio manager (audioMgr in the tutorials). Look at the source for Tutorial 1 (lines 84-85):

while(mysound->isPlaying())
  cAudio::cAudioSleep(10);

You will have to change this to:

while(mysound->isPlaying()) {
  cAudio::cAudioSleep(10);
  audioMgr->update();
}

for the code to work as expected. You will also have to call the update function regularly somewhere in your code to keep the sounds playing.

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