34 	struct linear_resampler *lr;  in linear_resampler_create()  local
36 	lr = (struct linear_resampler *)calloc(1, sizeof(*lr));  in linear_resampler_create()
37 	if (!lr)  in linear_resampler_create()
39 	lr->num_channels = num_channels;  in linear_resampler_create()
40 	lr->format_bytes = format_bytes;  in linear_resampler_create()
42 	linear_resampler_set_rates(lr, src_rate, dst_rate);  in linear_resampler_create()
44 	return lr;  in linear_resampler_create()
47 void linear_resampler_destroy(struct linear_resampler *lr)  in linear_resampler_destroy()  argument
49 	if (lr)  in linear_resampler_destroy()
50 		free(lr);  in linear_resampler_destroy()
53 void linear_resampler_set_rates(struct linear_resampler *lr, float from,  in linear_resampler_set_rates()  argument
56 	lr->f = (float)to / from;  in linear_resampler_set_rates()
57 	lr->to_times_100 = to * 100;  in linear_resampler_set_rates()
58 	lr->from_times_100 = from * 100;  in linear_resampler_set_rates()
59 	lr->src_offset = 0;  in linear_resampler_set_rates()
60 	lr->dst_offset = 0;  in linear_resampler_set_rates()
76 unsigned int linear_resampler_out_frames_to_in(struct linear_resampler *lr,  in linear_resampler_out_frames_to_in()  argument
83 	in_frames = (float)(lr->dst_offset + frames) / lr->f;  in linear_resampler_out_frames_to_in()
84 	if ((in_frames > lr->src_offset))  in linear_resampler_out_frames_to_in()
85 		return 1 + (unsigned int)(in_frames - lr->src_offset);  in linear_resampler_out_frames_to_in()
90 unsigned int linear_resampler_in_frames_to_out(struct linear_resampler *lr,  in linear_resampler_in_frames_to_out()  argument
97 	out_frames = lr->f * (lr->src_offset + frames - 1);  in linear_resampler_in_frames_to_out()
98 	if (out_frames > lr->dst_offset)  in linear_resampler_in_frames_to_out()
99 		return 1 + (unsigned int)(out_frames - lr->dst_offset);  in linear_resampler_in_frames_to_out()
104 int linear_resampler_needed(struct linear_resampler *lr)  in linear_resampler_needed()  argument
106 	return lr->from_times_100 != lr->to_times_100;  in linear_resampler_needed()
109 unsigned int linear_resampler_resample(struct linear_resampler *lr,  in linear_resampler_resample()  argument
127 		src_pos = (float)(lr->dst_offset + dst_idx) / lr->f;  in linear_resampler_resample()
128 		if (src_pos > lr->src_offset)  in linear_resampler_resample()
129 			src_pos -= lr->src_offset;  in linear_resampler_resample()
142 		in = (int16_t *)(src + src_idx * lr->format_bytes);  in linear_resampler_resample()
143 		out = (int16_t *)(dst + dst_idx * lr->format_bytes);  in linear_resampler_resample()
148 			for (ch = 0; ch < lr->num_channels; ch++)  in linear_resampler_resample()
151 			for (ch = 0; ch < lr->num_channels; ch++) {  in linear_resampler_resample()
154 						  (in[lr->num_channels + ch] -  in linear_resampler_resample()
162 	lr->src_offset += *src_frames;  in linear_resampler_resample()
163 	lr->dst_offset += dst_idx;  in linear_resampler_resample()
164 	while ((lr->src_offset > lr->from_times_100) &&  in linear_resampler_resample()
165 	       (lr->dst_offset > lr->to_times_100)) {  in linear_resampler_resample()
166 		lr->src_offset -= lr->from_times_100;  in linear_resampler_resample()
167 		lr->dst_offset -= lr->to_times_100;  in linear_resampler_resample()