C API Reference¶

doppler exposes every algorithm through a plain C99 API — no C++, no exceptions, no hidden allocations. Each module follows the same lifecycle pattern:

dp_foo_t *h = dp_foo_create(/* params */);   /* heap-allocate state  */
dp_foo_execute(h, in, n, out, max_out);      /* process a block      */
dp_foo_reset(h);                             /* zero state in-place  */
dp_foo_destroy(h);                           /* free                 */

The master include is doppler.h; it pulls in every public header. Individual headers live under native/inc/<module>/.

Browsing the API¶

File list — every header with a one-line description
Data structures — all _state_t structs
Functions — alphabetical index

Key modules¶

Header	What it does
`resample/resample_core.h`	`ciccompmf` — CIC droop compensator design
`cic/cic_core.h`	CIC decimation filter
`fir/fir_core.h`	Direct-form FIR (real and complex taps)
`nco/nco_core.h`	Numerically-controlled oscillator
`fft/fft_core.h`	Complex FFT (power-of-two, in-place)
`resamp/resamp_core.h`	Polyphase resampler
`hbdecim/hbdecim_core.h`	Halfband 2:1 decimator
`delay/delay_core.h`	Delay line (circular buffer, double-copy)
`agc/agc_core.h`	Log-domain automatic gain control