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lib_simple_raw_audio_converter / lsrac

Single file, header only, library for converting raw audio formats and sample rates.

It uses a sinc filter to make what is hopefully an ok sample rate conversion without distortions. (The filter coefficients are the same as in libsamplerate.)

Uses C++11 features.

Use

Before #including, #define LSRAC_IMPLEMENTATION in the file that you want to have the implementation - just like STB.

lsrac_convert_audio(..) is the only function, it will convert one stream of samples from one sample rate to another.

Note:

  • dst_data must be allocated by user and large enough
  • dst_samples and src_samples are assumed to be covering the whole segment and sample rates will be calculated based off them (proper start and end times must be chosen for conversions)
  • Conversions are only for one channel at a time
  • Use the stride parameters to support interleaved formats (see test.cpp)

See test.cpp for a working example of how to use lsrac.