Use properties construct helper to simplify block biquad construction

Author: jepler

shared-bindings/synthio/BlockBiquad.c

@@ -83,7 +83,9 @@ static mp_obj_t synthio_block_biquad_make_new(const mp_obj_type_t *type_in, size
     }
 
     synthio_filter_mode mode = validate_synthio_filter_mode(args[ARG_mode].u_obj, MP_QSTR_mode);
-    return common_hal_synthio_block_biquad_new(mode, args[ARG_frequency].u_obj, args[ARG_Q].u_obj);
+    mp_obj_t result = common_hal_synthio_block_biquad_new(mode);
+    properties_construct_helper(result, block_biquad_properties + 1, args + 1, MP_ARRAY_SIZE(block_biquad_properties) - 1);
+    return result;
 }
 
 //|

shared-bindings/synthio/BlockBiquad.h

@@ -25,4 +25,4 @@ void common_hal_synthio_block_biquad_set_frequency(synthio_block_biquad_t *self,
 
 synthio_filter_mode common_hal_synthio_block_biquad_get_mode(synthio_block_biquad_t *self);
 
-mp_obj_t common_hal_synthio_block_biquad_new(synthio_filter_mode mode, mp_obj_t frequency, mp_obj_t Q);
+mp_obj_t common_hal_synthio_block_biquad_new(synthio_filter_mode mode);

shared-module/synthio/BlockBiquad.c

@@ -30,11 +30,9 @@ static void fast_sincos(mp_float_t theta, sincos_result_t *result) {
     result->s = evens - odds;
 }
 
-mp_obj_t common_hal_synthio_block_biquad_new(synthio_filter_mode mode, mp_obj_t f0, mp_obj_t Q) {
+mp_obj_t common_hal_synthio_block_biquad_new(synthio_filter_mode mode) {
     synthio_block_biquad_t *self = mp_obj_malloc(synthio_block_biquad_t, &synthio_block_biquad_type_obj);
     self->mode = mode;
-    synthio_block_assign_slot(f0, &self->f0, MP_QSTR_frequency);
-    synthio_block_assign_slot(Q, &self->Q, MP_QSTR_Q);
     return MP_OBJ_FROM_PTR(self);
 }