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Minor encoding throughput improvement

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This commit is contained in:
Dominic Szablewski 2021-12-08 15:45:18 +01:00
parent 6a73cc65c5
commit 2103168519
1 changed files with 10 additions and 10 deletions
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20
qoi.h
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@ -390,17 +390,17 @@ void *qoi_encode(const void *data, const qoi_desc *desc, int *out_len) {
if (px.v == px_prev.v) { if (px.v == px_prev.v) {
run++; run++;
if (run == 62 || px_pos == px_end) {
bytes[p++] = QOI_OP_RUN | (run - 1);
run = 0;
}
} }
else {
if (run > 0) {
bytes[p++] = QOI_OP_RUN | (run - 1);
run = 0;
}
if (
run > 0 &&
(run == 62 || px.v != px_prev.v || px_pos == px_end)
) {
bytes[p++] = QOI_OP_RUN | (run - 1);
run = 0;
}
if (px.v != px_prev.v) {
int index_pos = QOI_COLOR_HASH(px) % 64; int index_pos = QOI_COLOR_HASH(px) % 64;
if (index[index_pos].v == px.v) { if (index[index_pos].v == px.v) {
@ -520,7 +520,7 @@ void *qoi_decode(const void *data, int size, qoi_desc *desc, int channels) {
px.rgba.a = bytes[p++]; px.rgba.a = bytes[p++];
} }
else if ((b1 & QOI_MASK_2) == QOI_OP_INDEX) { else if ((b1 & QOI_MASK_2) == QOI_OP_INDEX) {
px = index[b1 ^ QOI_OP_INDEX]; px = index[b1];
} }
else if ((b1 & QOI_MASK_2) == QOI_OP_DIFF) { else if ((b1 & QOI_MASK_2) == QOI_OP_DIFF) {
px.rgba.r += ((b1 >> 4) & 0x03) - 2; px.rgba.r += ((b1 >> 4) & 0x03) - 2;