resamp2_rrrf
Variants: resamp2_cccf, resamp2_crcf, resamp2_rrrf
Half-band resampler, implemented as a dyadic (half-band) polyphase filter bank for interpolation, decimation, synthesis, and analysis.
Public Functions
| resamp2_rrrf | resamp2_rrrf_create( |
| resamp2_rrrf | resamp2_rrrf_recreate( |
| resamp2_rrrf | resamp2_rrrf_copy( |
| int | resamp2_rrrf_destroy( |
| int | resamp2_rrrf_print( |
| int | resamp2_rrrf_reset( |
| unsigned int | resamp2_rrrf_get_delay( |
| int | resamp2_rrrf_set_scale( |
| int | resamp2_rrrf_get_scale( |
| int | resamp2_rrrf_filter_execute( |
| int | resamp2_rrrf_analyzer_execute( |
| int | resamp2_rrrf_synthesizer_execute( |
| int | resamp2_rrrf_decim_execute( |
| int | resamp2_rrrf_interp_execute( |
Interfaces
resamp2_rrrf resamp2_rrrf_create(
Create half-band resampler from design prototype.
- _m : filter semi-length (h_len = 4*m+1), 2 <= _m
- _f0 : filter center frequency, -0.5 <= _f0 <= 0.5
- _as : stop-band attenuation [dB], 0 < _as
resamp2_rrrf resamp2_rrrf_recreate(
Re-create half-band resampler with new properties
- _q : original half-band resampler object
- _m : filter semi-length (h_len = 4*m+1), 2 <= _m
- _f0 : filter center frequency, -0.5 <= _f0 <= 0.5
- _as : stop-band attenuation [dB], 0 < _as
resamp2_rrrf resamp2_rrrf_copy(
Copy object including all internal objects and state
int resamp2_rrrf_destroy(
Destroy resampler, freeing all internally-allocated memory
int resamp2_rrrf_print(
print resampler object's internals to stdout
int resamp2_rrrf_reset(
Reset internal buffer
unsigned int resamp2_rrrf_get_delay(
Get resampler filter delay (semi-length m)
int resamp2_rrrf_set_scale(
Get output scaling for resampler
- _q : resampler object
- _scale : scaling factor to apply to each output sample
int resamp2_rrrf_get_scale(
Get output scaling for resampler
- _q : resampler object
- _scale : scaling factor applied to each output sample
int resamp2_rrrf_filter_execute(
Execute resampler as half-band filter for a single input sample \(x\) where \(y_0\) is the output of the effective low-pass filter, and \(y_1\) is the output of the effective high-pass filter.
- _q : resampler object
- _x : input sample
- _y0 : output sample pointer (low frequency)
- _y1 : output sample pointer (high frequency)
int resamp2_rrrf_analyzer_execute(
Execute resampler as half-band analysis filterbank on a pair of sequential time-domain input samples. The decimated outputs of the low- and high-pass equivalent filters are stored in \(y_0\) and \(y_1\), respectively.
- _q : resampler object
- _x : input array, shape: (2, 1)
- _y : output array, shape: (2, 1)
int resamp2_rrrf_synthesizer_execute(
Execute resampler as half-band synthesis filterbank on a pair of input samples. The low- and high-pass input samples are provided by \(x_0\) and \(x_1\), respectively. The sequential time-domain output samples are stored in \(y_0\) and \(y_1\).
- _q : resampler object
- _x : input array, shape: (2, 1)
- _y : output array, shape: (2, 1)
int resamp2_rrrf_decim_execute(
Execute resampler as half-band decimator on a pair of sequential time-domain input samples.
- _q : resampler object
- _x : input array, shape: (2, 1)
- _y : output sample pointer
int resamp2_rrrf_interp_execute(
Execute resampler as half-band interpolator on a single input sample
- _q : resampler object
- _x : input sample
- _y : output array, shape: (2, 1)