17 static void set_default_parameters(struct drc *drc);
18 static void init_data_buffer(struct drc *drc);
19 static void init_emphasis_eq(struct drc *drc);
20 static void init_crossover(struct drc *drc);
21 static void init_kernel(struct drc *drc);
22 static void free_data_buffer(struct drc *drc);
23 static void free_emphasis_eq(struct drc *drc);
24 static void free_kernel(struct drc *drc);
26 struct drc *drc_new(float sample_rate)  in drc_new()
28 	struct drc *drc = (struct drc *)calloc(1, sizeof(struct drc));  in drc_new()  local
29 	drc->sample_rate = sample_rate;  in drc_new()
30 	set_default_parameters(drc);  in drc_new()
31 	return drc;  in drc_new()
34 void drc_init(struct drc *drc)  in drc_init()  argument
36 	init_data_buffer(drc);  in drc_init()
37 	init_emphasis_eq(drc);  in drc_init()
38 	init_crossover(drc);  in drc_init()
39 	init_kernel(drc);  in drc_init()
42 void drc_free(struct drc *drc)  in drc_free()  argument
44 	free_kernel(drc);  in drc_free()
45 	free_emphasis_eq(drc);  in drc_free()
46 	free_data_buffer(drc);  in drc_free()
47 	free(drc);  in drc_free()
51 static void init_data_buffer(struct drc *drc)  in init_data_buffer()  argument
57 		drc->data1[i] = (float *)calloc(1, size);  in init_data_buffer()
58 		drc->data2[i] = (float *)calloc(1, size);  in init_data_buffer()
63 static void free_data_buffer(struct drc *drc)  in free_data_buffer()  argument
68 		free(drc->data1[i]);  in free_data_buffer()
69 		free(drc->data2[i]);  in free_data_buffer()
73 void drc_set_param(struct drc *drc, int index, unsigned paramID, float value)  in drc_set_param()  argument
77 		drc->parameters[index][paramID] = value;  in drc_set_param()
80 static float drc_get_param(struct drc *drc, int index, unsigned paramID)  in drc_get_param()  argument
83 	return drc->parameters[index][paramID];  in drc_get_param()
87 static void set_default_parameters(struct drc *drc)  in set_default_parameters()  argument
89 	float nyquist = drc->sample_rate / 2;  in set_default_parameters()
93 		float *param = drc->parameters[i];  in set_default_parameters()
113 	drc->parameters[0][PARAM_CROSSOVER_LOWER_FREQ] = 0;  in set_default_parameters()
114 	drc->parameters[1][PARAM_CROSSOVER_LOWER_FREQ] = 200 / nyquist;  in set_default_parameters()
115 	drc->parameters[2][PARAM_CROSSOVER_LOWER_FREQ] = 2000 / nyquist;  in set_default_parameters()
118 	drc->parameters[0][PARAM_FILTER_STAGE_GAIN] = 4.4f; /* dB */  in set_default_parameters()
119 	drc->parameters[0][PARAM_FILTER_STAGE_RATIO] = 2;  in set_default_parameters()
120 	drc->parameters[0][PARAM_FILTER_ANCHOR] = 15000 / nyquist;  in set_default_parameters()
171 static void init_emphasis_eq(struct drc *drc)  in init_emphasis_eq()  argument
177 	float stage_gain = drc_get_param(drc, 0, PARAM_FILTER_STAGE_GAIN);  in init_emphasis_eq()
178 	float stage_ratio = drc_get_param(drc, 0, PARAM_FILTER_STAGE_RATIO);  in init_emphasis_eq()
179 	float anchor_freq = drc_get_param(drc, 0, PARAM_FILTER_ANCHOR);  in init_emphasis_eq()
181 	drc->emphasis_eq = eq2_new();  in init_emphasis_eq()
182 	drc->deemphasis_eq = eq2_new();  in init_emphasis_eq()
188 			eq2_append_biquad_direct(drc->emphasis_eq, j, &e);  in init_emphasis_eq()
189 			eq2_append_biquad_direct(drc->deemphasis_eq, j, &d);  in init_emphasis_eq()
196 static void free_emphasis_eq(struct drc *drc)  in free_emphasis_eq()  argument
198 	eq2_free(drc->emphasis_eq);  in free_emphasis_eq()
199 	eq2_free(drc->deemphasis_eq);  in free_emphasis_eq()
203 static void init_crossover(struct drc *drc)  in init_crossover()  argument
205 	float freq1 = drc->parameters[1][PARAM_CROSSOVER_LOWER_FREQ];  in init_crossover()
206 	float freq2 = drc->parameters[2][PARAM_CROSSOVER_LOWER_FREQ];  in init_crossover()
208 	crossover2_init(&drc->xo2, freq1, freq2);  in init_crossover()
212 static void init_kernel(struct drc *drc)  in init_kernel()  argument
217 		dk_init(&drc->kernel[i], drc->sample_rate);  in init_kernel()
219 		float db_threshold = drc_get_param(drc, i, PARAM_THRESHOLD);  in init_kernel()
220 		float db_knee = drc_get_param(drc, i, PARAM_KNEE);  in init_kernel()
221 		float ratio = drc_get_param(drc, i, PARAM_RATIO);  in init_kernel()
222 		float attack_time = drc_get_param(drc, i, PARAM_ATTACK);  in init_kernel()
223 		float release_time = drc_get_param(drc, i, PARAM_RELEASE);  in init_kernel()
224 		float pre_delay_time = drc_get_param(drc, i, PARAM_PRE_DELAY);  in init_kernel()
225 		float releaseZone1 = drc_get_param(drc, i, PARAM_RELEASE_ZONE1);  in init_kernel()
226 		float releaseZone2 = drc_get_param(drc, i, PARAM_RELEASE_ZONE2);  in init_kernel()
227 		float releaseZone3 = drc_get_param(drc, i, PARAM_RELEASE_ZONE3);  in init_kernel()
228 		float releaseZone4 = drc_get_param(drc, i, PARAM_RELEASE_ZONE4);  in init_kernel()
229 		float db_post_gain = drc_get_param(drc, i, PARAM_POST_GAIN);  in init_kernel()
230 		int enabled = drc_get_param(drc, i, PARAM_ENABLED);  in init_kernel()
232 		dk_set_parameters(&drc->kernel[i], db_threshold, db_knee, ratio,  in init_kernel()
237 		dk_set_enabled(&drc->kernel[i], enabled);  in init_kernel()
242 static void free_kernel(struct drc *drc)  in free_kernel()  argument
246 		dk_free(&drc->kernel[i]);  in free_kernel()
368 void drc_process(struct drc *drc, float **data, int frames)  in drc_process()  argument
371 	float **data1 = drc->data1;  in drc_process()
372 	float **data2 = drc->data2;  in drc_process()
375 	if (!drc->emphasis_disabled)  in drc_process()
376 		eq2_process(drc->emphasis_eq, data[0], data[1], frames);  in drc_process()
379 	crossover2_process(&drc->xo2, frames, data[0], data[1], data1[0],  in drc_process()
385 	dk_process(&drc->kernel[0], data, frames);  in drc_process()
386 	dk_process(&drc->kernel[1], data1, frames);  in drc_process()
387 	dk_process(&drc->kernel[2], data2, frames);  in drc_process()
394 	if (!drc->emphasis_disabled)  in drc_process()
395 		eq2_process(drc->deemphasis_eq, data[0], data[1], frames);  in drc_process()