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Rename functions and structure of biquad lowpass filter

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This commit is contained in:
Andreas Eversberg
2017-01-05 15:53:55 +01:00
parent d447be5e26
commit 713b1ab118
6 changed files with 15 additions and 15 deletions
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8
src/common/samplerate.c
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@@ -37,8 +37,8 @@ int init_samplerate(samplerate_t *state, double samplerate)
memset(state, 0, sizeof(*state));
state->factor = samplerate / 8000.0;
biquad_init(&state->up.bq, 4000.0, samplerate);
biquad_init(&state->down.bq, 4000.0, samplerate);
filter_lowpass_init(&state->up.lp, 4000.0, samplerate);
filter_lowpass_init(&state->down.lp, 4000.0, samplerate);
return 0;
}
@@ -56,7 +56,7 @@ int samplerate_downsample(samplerate_t *state, int16_t *input, int input_num, in
spl[i] = *input++ / 32768.0;
/* filter down */
biquad_process(&state->down.bq, spl, input_num, 1);
filter_lowpass_process(&state->down.lp, spl, input_num, 1);
/* resample filtered result */
in_index = state->down.in_index;
@@ -125,7 +125,7 @@ int samplerate_upsample(samplerate_t *state, int16_t *input, int input_num, int1
state->up.in_index = in_index;
/* filter up */
biquad_process(&state->up.bq, spl, output_num, 1);
filter_lowpass_process(&state->up.lp, spl, output_num, 1);
/* convert double to samples */
for (i = 0; i < output_num; i++) {