qoa.h: Sync with upstream

thirdparty/README.md

@@ -694,7 +694,7 @@ Collection of single-file libraries used in Godot components.
   * License: MIT
 - `qoa.h`
   * Upstream: https://github.com/phoboslab/qoa
-  * Version: git (e0c69447d4d3945c3c92ac1751e4cdc9803a8303, 2024)
+  * Version: git (a2d927f8ce78a85e903676a33e0f956e53b89f7d, 2024)
   * Modifications: Added a few modifiers to comply with C++ nature.
   * License: MIT
 - `r128.{c,h}`

thirdparty/misc/patches/qoa-min-fix.patch

@@ -1,5 +1,5 @@
 diff --git a/qoa.h b/qoa.h
-index cfed266bef..23612bb0bf 100644
+index f0f44214d8..9fa5465f08 100644
 --- a/qoa.h
 +++ b/qoa.h
 @@ -140,14 +140,14 @@ typedef struct {
@@ -42,7 +42,7 @@ index cfed266bef..23612bb0bf 100644
  
  	for (unsigned int c = 0; c < qoa->channels; c++) {
  		/* Set the initial LMS weights to {0, 0, -1, 2}. This helps with the 
-@@ -655,7 +655,7 @@ short *qoa_decode(const unsigned char *bytes, int size, qoa_desc *qoa) {
+@@ -657,7 +657,7 @@ short *qoa_decode(const unsigned char *bytes, int size, qoa_desc *qoa) {
  
  	/* Calculate the required size of the sample buffer and allocate */
  	int total_samples = qoa->samples * qoa->channels;

thirdparty/misc/qoa.h

@@ -626,12 +626,14 @@ unsigned int qoa_decode_frame(const unsigned char *bytes, unsigned int size, qoa
 			qoa_uint64_t slice = qoa_read_u64(bytes, &p);
 
 			int scalefactor = (slice >> 60) & 0xf;
+			slice <<= 4;
+
 			int slice_start = sample_index * channels + c;
 			int slice_end = qoa_clamp(sample_index + QOA_SLICE_LEN, 0, samples) * channels + c;
 
 			for (int si = slice_start; si < slice_end; si += channels) {
 				int predicted = qoa_lms_predict(&qoa->lms[c]);
-				int quantized = (slice >> 57) & 0x7;
+				int quantized = (slice >> 61) & 0x7;
 				int dequantized = qoa_dequant_tab[scalefactor][quantized];
 				int reconstructed = qoa_clamp_s16(predicted + dequantized);