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add NFM ifdef for MP3_RATE #472

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add NFM ifdef for MP3_RATE #472

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909cc3b
add NFM ifdef for MP3_RATE
realytcracker Mar 29, 2024
d3cb122
add comment about sample rate
gabeschine Apr 1, 2025
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7 changes: 6 additions & 1 deletion src/rtl_airband.h
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Original file line number Diff line number Diff line change
Expand Up @@ -65,15 +65,20 @@
#define DEFAULT_SAMPLE_RATE 2560000

#ifdef NFM
// 16k samples has less distortion and lends itself to better DSP downstream
// there's an argument to be made that we should use 16k regardless of if NFM support is enabled
// or not, but at the time of introducing this change making it conditional was the more conservative
// change.
#define WAVE_RATE 16000
#define MP3_RATE 16000
#else
#define WAVE_RATE 8000
#define MP3_RATE 8000
#endif /* NFM */

#define WAVE_BATCH WAVE_RATE / 8
#define AGC_EXTRA 100
#define WAVE_LEN 2 * WAVE_BATCH + AGC_EXTRA
#define MP3_RATE 8000
#define MAX_SHOUT_QUEUELEN 32768
#define TAG_QUEUE_LEN 16

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