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libebur128
==========
libebur128 is a library that implements the EBU R 128 standard for loudness
normalisation.
All source code is licensed under the MIT license. See COPYING file for
details.
See also [loudness-scanner tool](https://github.com/jiixyj/loudness-scanner).
News
----
v1.2.4 released:
* Fix broken `ebur128_loudness_global_multiple()` function. Since v1.1.0 it
calculated the relative threshold just from the last state given to it,
resulting in wrong values.
* More tests
* Fix some minor build issues
* Fix uninitialized memory in `ebur128_init()`, possibly resulting in wrong
values
v1.2.3 released:
* Fix uninitialized memory access during true peak scanning (bug #72)
v1.2.2 released (v1.2.1 was mistagged):
* Fix a null pointer dereference when doing true peak scanning of 192kHz data
v1.2.0 released:
* New functions for real time loudness/peak monitoring:
* `ebur128_loudness_window()`
* `ebur128_set_max_window()`
* `ebur128_set_max_history()`
* `ebur128_prev_sample_peak()`
* `ebur128_prev_true_peak()`
* New FIR resampler for true peak calculation, removing Speex dependency
* Add true peak conformance tests
* Bug fixes
v1.1.0 released:
* Add `ebur128_relative_threshold()`
* Add channel definitions from ITU R-REC-BS 1770-4 to channel enum
* Fix some minor build issues
v1.0.3 released:
* Fix build with recent speexdsp
* Correct license file name
* CMake option to disable static library
* minimal-example.c: do not hard code program name in usage
Features
--------
* Portable ANSI C code
* Implements M, S and I modes
* Implements loudness range measurement (EBU - TECH 3342)
* True peak scanning
* Supports all samplerates by recalculation of the filter coefficients
Installation
------------
In the root folder, type:
mkdir build
cd build
cmake ..
make
If you want the git version, run simply:
git clone git://github.com/jiixyj/libebur128.git
Usage
-----
Library usage should be pretty straightforward. All exported symbols are
documented in the ebur128.h header file. For a usage example, see
minimal-example.c in the tests folder.
On some operating systems, static libraries should be compiled as position
independent code. You can enable that by turning on `WITH_STATIC_PIC`.
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