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set the sample rate to ratio 10

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KubaPro010
2025-03-16 10:10:09 +01:00
parent 686211524c
commit 344ae5ae0e
6 changed files with 122 additions and 13 deletions
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7
src/rds.h
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@@ -10,9 +10,10 @@
#define GROUP_LENGTH 4
#define BITS_PER_GROUP (GROUP_LENGTH * (BLOCK_SIZE + POLY_DEG))
#define RDS_SAMPLE_RATE 9500
#define SAMPLES_PER_BIT 8 // (1/1187.5)*RDS_SAMPLE_RATE
#define FILTER_SIZE 24
// when i say ratio 10, i mean 1187.5*10
#define RDS_SAMPLE_RATE 11875 // pira's m32 works at 361 khz, which is a ratio of 304, but this does a ratio of 10, while the m232 does a ratio of about 500
#define SAMPLES_PER_BIT 10 // (1/1187.5)*RDS_SAMPLE_RATE or RDS_SAMPLE_RATE/1187.5, to check you can do (1187.5*SAMPLES_PER_BIT)=(RDS_SAMPLE_RATE)
#define FILTER_SIZE 40
#define SAMPLE_BUFFER_SIZE (SAMPLES_PER_BIT + FILTER_SIZE)
#define RT_LENGTH 64

2
src/waveforms.c
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@@ -6,5 +6,5 @@
Released under the GNU GPL v3 license.
*/
float waveform_biphase[24] = {0.004662004662004664, -1.192872569837455e-17, -0.008325008325008324, 5.168171209081069e-17, 0.017316017316017313, -4.0195812562580885e-17, -0.04761904761904761, -2.153908398182045e-17, 0.2857142857142856, 0.7363107781851077, 1.0, 0.7363107781851077, 0.0, -0.7363107781851077, -1.0, -0.7363107781851077, -0.2857142857142856, 2.153908398182045e-17, 0.04761904761904761, 4.0195812562580885e-17, -0.017316017316017313, -5.168171209081069e-17, 0.008325008325008324, 1.192872569837455e-17};
float waveform_biphase[40] = {0.001428519781289772, 0.0016664760371696286, -0.0007489747210579489, -0.002879473467708782, -0.00106869603307147, 0.003402376491623338, 0.004197098675717825, -0.0020108774820242203, -0.008325008325008265, -0.003370279435959911, 0.011902549863605172, 0.016661972622002308, -0.009354493372215611, -0.04761904761904756, -0.02565484871607826, 0.14035864022832323, 0.4612061004721879, 0.817876195033512, 1.0, 0.8360849414906586, 0.3268491412309902, -0.3268491412309902, -0.8360849414906588, -1.0, -0.817876195033512, -0.461206100472188, -0.14035864022832323, 0.02565484871607837, 0.04761904761904745, 0.009354493372215611, -0.016661972622002308, -0.011902549863605172, 0.0033702794359598, 0.008325008325008376, 0.0020108774820242203, -0.004197098675717825, -0.003402376491623449, 0.00106869603307147, 0.002879473467708893, 0.00074897472105806};

2
src/waveforms.h
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@@ -6,4 +6,4 @@
Released under the GNU GPL v3 license.
*/
extern float waveform_biphase[24];
extern float waveform_biphase[40];