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Allow for sample rate to be changed when used as a library #552

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Allow for sample rate to be changed when used as a library #552

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9fd29fa
Expose define to address shorepine/amy#425 for other platforms
jgartrel Feb 12, 2026
a209c42
Add ability to re-define AMY_SAMPLE_RATE, shorepine/amy#551
jgartrel Feb 13, 2026
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2 changes: 1 addition & 1 deletion src/amy.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1764,7 +1764,7 @@ int16_t * amy_fill_buffer() {

// TODO -- the esp stuff here could sit outside of AMY
// For some reason, have to drop a bit to stop hard wrapping on esp?
#if defined(ESP_PLATFORM) || defined(__IMXRT1062__)
#if defined(ESP_PLATFORM) || defined(__IMXRT1062__) || defined(AMY_ISSUE_425)
uintval >>= 1;
#endif
if (positive) {
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6 changes: 6 additions & 0 deletions src/amy.h
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Expand Up @@ -43,23 +43,29 @@ extern const uint16_t pcm_samples;


// Set block size and SR. We try for 256/44100, but some platforms don't let us:
#ifndef AMY_BLOCK_SIZE
#ifdef AMY_DAISY
#define AMY_BLOCK_SIZE 128
#define BLOCK_SIZE_BITS 7 // log2 of BLOCK_SIZE
#else
#define AMY_BLOCK_SIZE 256
#define BLOCK_SIZE_BITS 8 // log2 of BLOCK_SIZE
#endif
#endif

#ifndef AMY_SAMPLE_RATE
#ifdef AMY_DAISY
#define AMY_SAMPLE_RATE 48000
#elif defined __EMSCRIPTEN__
#define AMY_SAMPLE_RATE 48000
#else
#define AMY_SAMPLE_RATE 44100
#endif
#endif

#ifndef PCM_AMY_SAMPLE_RATE
#define PCM_AMY_SAMPLE_RATE 22050
#endif

// Transfer types.
#define AMY_TRANSFER_TYPE_NONE 0
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