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sparse_array: optimizations for lossy case

This commit is contained in:
Even Rouault 2017-09-01 16:31:10 +02:00
parent 8a17be8945
commit 7017e67a01
1 changed files with 30 additions and 0 deletions
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30
src/lib/openjp2/sparse_array.c
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@ -200,6 +200,21 @@ static OPJ_BOOL opj_sparse_array_int32_read_or_write(
for (; k < x_incr; k++) { for (; k < x_incr; k++) {
dest_ptr[k * buf_col_stride] = src_ptr[k]; dest_ptr[k * buf_col_stride] = src_ptr[k];
} }
} else if (x_incr >= 8 && buf_col_stride == 8) {
for (j = 0; j < y_incr; j++) {
OPJ_UINT32 k;
for (k = 0; k < (x_incr & ~3U); k += 4) {
dest_ptr[k * buf_col_stride] = src_ptr[k];
dest_ptr[(k + 1) * buf_col_stride] = src_ptr[k + 1];
dest_ptr[(k + 2) * buf_col_stride] = src_ptr[k + 2];
dest_ptr[(k + 3) * buf_col_stride] = src_ptr[k + 3];
}
for (; k < x_incr; k++) {
dest_ptr[k * buf_col_stride] = src_ptr[k];
}
dest_ptr += buf_line_stride;
src_ptr += block_width;
}
} else { } else {
/* General case */ /* General case */
for (j = 0; j < y_incr; j++) { for (j = 0; j < y_incr; j++) {
@ -254,6 +269,21 @@ static OPJ_BOOL opj_sparse_array_int32_read_or_write(
src_ptr += buf_line_stride; src_ptr += buf_line_stride;
dest_ptr += block_width; dest_ptr += block_width;
} }
} else if (x_incr >= 8 && buf_col_stride == 8) {
for (j = 0; j < y_incr; j++) {
OPJ_UINT32 k;
for (k = 0; k < (x_incr & ~3U); k += 4) {
dest_ptr[k] = src_ptr[k * buf_col_stride];
dest_ptr[k + 1] = src_ptr[(k + 1) * buf_col_stride];
dest_ptr[k + 2] = src_ptr[(k + 2) * buf_col_stride];
dest_ptr[k + 3] = src_ptr[(k + 3) * buf_col_stride];
}
for (; k < x_incr; k++) {
dest_ptr[k] = src_ptr[k * buf_col_stride];
}
src_ptr += buf_line_stride;
dest_ptr += block_width;
}
} else { } else {
/* General case */ /* General case */
for (j = 0; j < y_incr; j++) { for (j = 0; j < y_incr; j++) {