Records

• class DeferredLogBuffer

• class DeferredLogLine

• class EffectsModule

• class EffectsModule

• class EnumHash

• class StreamUsageHash

Functions

• template <typename T>

  double SampleToDouble (T value)

  Defined at line 20 of file ../../src/media/audio/lib/analysis/analysis.cc

• template <>

  double SampleToDouble<unsigned char> (uint8_t value)

  Defined at line 24 of file ../../src/media/audio/lib/analysis/analysis.cc

• void FFT (double * real, double * imag, uint32_t buf_size)

  Perform a Fast Fourier Transform on the provided data arrays.

  On input, real[] and imag[] contain 'buf_size' number of double-float values

  in the time domain (such as audio samples); buf_size must be a power-of-two.

  On output, real[] and imag[] contain 'buf_size' number of double-float values

  in frequency domain, but generally used only through buf_size/2 (per Nyquist)

  Defined at line 71 of file ../../src/media/audio/lib/analysis/analysis.cc

• double GetPhase (double real, double imag)

  Calculate phase in radians for the complex pair. Correctly handles negative

  or zero values: range of return value is [-PI,PI], not just [-PI/2,PI/2].

  Defined at line 139 of file ../../src/media/audio/lib/analysis/analysis.cc

• void RectangularToPolar (const double * real, const double * imag, uint32_t buf_size, double * magn, double * phase)

  Convert provided real-imag (cartesian) data into magn-phase (polar) format.

  This is done with 2 in-buffers 2 two out-buffers -- NOT 2 in-out-buffers.

  TODO(mpuryear): will clients (tests) want this transformed in-place?

  Defined at line 160 of file ../../src/media/audio/lib/analysis/analysis.cc

• void RealDFT (const double * reals, uint32_t len, double * r_freq, double * i_freq)

  Perform the Discrete Fourier Transform, converting time-domain reals[] (len buf_size) into

  freq-domain real_freq[]

  &

  imag_freq[], both of length (buf_size/2 + 1).

  This is a naive, unoptimized (N^2)/2 implementation.

  Defined at line 176 of file ../../src/media/audio/lib/analysis/analysis.cc

• void InverseDFT (double * real, double * imag, uint32_t buf_size, double * real_out)

  Converts frequency-domain arrays real_freq

  &

  imag_freq (len buf_size/2 + 1) into time-domain

  array reals (len buf_size). This is a naive, unoptimized (N^2)/2 implementation.

  Defined at line 199 of file ../../src/media/audio/lib/analysis/analysis.cc

• void InverseFFT (double * real, double * imag, uint32_t buf_size)

  Converts frequency-domain arrays reals

  &

  imags (len buf_size) in-place into time-domain arrays

  (also len buf_size)

  Defined at line 224 of file ../../src/media/audio/lib/analysis/analysis.cc

Variables

DeferredLogBuffer *const deffered_log