The Quant Library (libquant)

Open source project, that aims to make fast cross-platform non-real-time DSP library, that supports multi-threading.

Current library development period is Alpha.

What can libquant do?

• Reading and writing following formats:
  • Microsoft WAV files
    • PCM format (16, 24, 32 bits)
    • IEEE-754 (floating-point) PCM format (32, 64 bits)
• It can apply following effects to samples:
  • Distortion (clipping)
  • Amplifying (and auto-amplifying to maximum)
  • Reverse
  • Chorus (experimental)
  • Flow effect
  • Quantization (supports dithering)
  • Inverting
  • Fade effect (linear or sine)
  • Mean filter (supports median, arithmetic mean and random)
  • Echo (without equalization)
  • Delay (single echo effect)
  • Muting
  • Sound speed-up effect
  • Mixing with noise (pseudo-noise, uses rand())
  • Channels mixing
  • Channels difference effect
• It can synthesize some waveforms:
  • Sinusoid
  • Square
  • Noise (pseudo-noise, uses rand())
  • Sawtooth
  • Silence

Limitations

• Maximum number of channels is (2^32)-1
• Maximum sample rate is (2^32)-1 Hz
• Number of samples is storing as size_t, its width depends on platform.
• Each channel must have the same number of samples.

Remark: If you use OpenMP 2.0 (or older version), then samples iterator will be long long.

Requirements

• C99 (C17 is recommended) or C++11 compliant compiler.
• Target architecture must:
  • Have 8-bit bytes (CHAR_BIT must be 8).
  • Meet IEEE-754 standard.
  • Be either one's complement or two's complement.
  • Be either Big-Endian or Little-Endian.
• for multithreading support | Compiler with OpenMP 2.0 support (OpenMP 3.0 is recommended).

Remark: Some compilers, that support C++11 partially also can compile libquant.

Documentation

See main page of the documentation

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