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Update qoa.h

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Ray
2026-03-29 21:21:11 +02:00
parent d5326fe880
commit e5f0c9f8b1
1 changed files with 30 additions and 30 deletions
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10
src/external/qoa.h vendored
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@ -387,7 +387,7 @@ unsigned int qoa_encode_frame(const short *sample_data, qoa_desc *qoa, unsigned
int slice_start = sample_index * channels + c; int slice_start = sample_index * channels + c;
int slice_end = (sample_index + slice_len) * channels + c; int slice_end = (sample_index + slice_len) * channels + c;
/* Brute for search for the best scalefactor. Just go through all /* Brute force search for the best scalefactor. Just go through all
16 scalefactors, encode all samples for the current slice and 16 scalefactors, encode all samples for the current slice and
meassure the total squared error. */ meassure the total squared error. */
qoa_uint64_t best_rank = -1; qoa_uint64_t best_rank = -1;
@ -402,7 +402,7 @@ unsigned int qoa_encode_frame(const short *sample_data, qoa_desc *qoa, unsigned
/* There is a strong correlation between the scalefactors of /* There is a strong correlation between the scalefactors of
neighboring slices. As an optimization, start testing neighboring slices. As an optimization, start testing
the best scalefactor of the previous slice first. */ the best scalefactor of the previous slice first. */
int scalefactor = (sfi + prev_scalefactor[c]) % 16; int scalefactor = (sfi + prev_scalefactor[c]) & (16 - 1);
/* We have to reset the LMS state to the last known good one /* We have to reset the LMS state to the last known good one
before trying each scalefactor, as each pass updates the LMS before trying each scalefactor, as each pass updates the LMS
@ -500,7 +500,7 @@ void *qoa_encode(const short *sample_data, qoa_desc *qoa, unsigned int *out_len)
num_frames * QOA_LMS_LEN * 4 * qoa->channels + /* 4 * 4 bytes lms state per channel */ num_frames * QOA_LMS_LEN * 4 * qoa->channels + /* 4 * 4 bytes lms state per channel */
num_slices * 8 * qoa->channels; /* 8 byte slices */ num_slices * 8 * qoa->channels; /* 8 byte slices */
unsigned char *bytes = (unsigned char *)QOA_MALLOC(encoded_size); unsigned char *bytes = QOA_MALLOC(encoded_size);
for (unsigned int c = 0; c < qoa->channels; c++) { for (unsigned int c = 0; c < qoa->channels; c++) {
/* Set the initial LMS weights to {0, 0, -1, 2}. This helps with the /* Set the initial LMS weights to {0, 0, -1, 2}. This helps with the
@ -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 */ /* Calculate the required size of the sample buffer and allocate */
int total_samples = qoa->samples * qoa->channels; int total_samples = qoa->samples * qoa->channels;
short *sample_data = (short *)QOA_MALLOC(total_samples * sizeof(short)); short *sample_data = QOA_MALLOC(total_samples * sizeof(short));
unsigned int sample_index = 0; unsigned int sample_index = 0;
unsigned int frame_len; unsigned int frame_len;
@ -733,7 +733,7 @@ void *qoa_read(const char *filename, qoa_desc *qoa) {
bytes_read = fread(data, 1, size, f); bytes_read = fread(data, 1, size, f);
fclose(f); fclose(f);
sample_data = qoa_decode((const unsigned char *)data, bytes_read, qoa); sample_data = qoa_decode(data, bytes_read, qoa);
QOA_FREE(data); QOA_FREE(data);
return sample_data; return sample_data;
} }