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commit 2f5bf344b13e58e394eb46f5dfd9136581428234
Author: Chema Gonzalez <che...@meta.com>
AuthorDate: Tue May 13 08:42:17 2025 -0700
Y4M loader: add support for 10-bit 4:2:2
Current implementation just discards the last 2 bits.
Tested:
```
$ src/bin/.libs/imlib2_view test/images/img-8x8.yuv422p10.full_range.y4m
$ feh test/images/img-8x8.yuv422p10.full_range.y4m
```
---
src/modules/loaders/loader_y4m.c | 30 +++++++++++++++++++++++++++
test/images/img-8x8.yuv422p10.full_range.y4m | Bin 0 -> 337 bytes
2 files changed, 30 insertions(+)
diff --git a/src/modules/loaders/loader_y4m.c b/src/modules/loaders/loader_y4m.c
index 5a4bcda..0b7629b 100644
--- a/src/modules/loaders/loader_y4m.c
+++ b/src/modules/loaders/loader_y4m.c
@@ -47,6 +47,7 @@ typedef struct {
Y4M_PARSE_CS_444,
Y4M_PARSE_CS_MONO,
Y4M_PARSE_CS_420P10,
+ Y4M_PARSE_CS_422P10,
Y4M_PARSE_CS_444P10,
} colour_space;
enum {
@@ -216,6 +217,11 @@ y4m__parse_params(Y4mParse *res, const uint8_t **start, const uint8_t *end)
res->colour_space = Y4M_PARSE_CS_420;
res->depth = 8;
}
+ else if (y4m__match("422p10", 6, &p, end))
+ {
+ res->colour_space = Y4M_PARSE_CS_422P10;
+ res->depth = 10;
+ }
else if (y4m__match("422", 3, &p, end))
{
res->colour_space = Y4M_PARSE_CS_422;
@@ -346,6 +352,11 @@ y4m_parse_frame(Y4mParse *res)
sdiv = 2;
voff = (npixels * 3) / 2;
break;
+ case Y4M_PARSE_CS_422P10:
+ res->frame_data_len = npixels * 2 * 2;
+ sdiv = 2;
+ voff = (npixels * 3) / 2;
+ break;
case Y4M_PARSE_CS_444:
res->frame_data_len = npixels * 3;
sdiv = 1;
@@ -474,6 +485,7 @@ _load(ImlibImage *im, int load_data)
conv = conv_mono;
break;
case Y4M_PARSE_CS_422:
+ case Y4M_PARSE_CS_422P10:
if (y4m.range == Y4M_PARSE_RANGE_FULL)
conv = J422ToARGB;
else
@@ -525,6 +537,10 @@ _load(ImlibImage *im, int load_data)
{
buf_size = (y4m.w * y4m.h * 3) >> 1;
}
+ else if (y4m.colour_space == Y4M_PARSE_CS_422P10)
+ {
+ buf_size = (y4m.w * y4m.h * 2);
+ }
else if (y4m.colour_space == Y4M_PARSE_CS_444P10)
{
buf_size = (y4m.w * y4m.h * 3);
@@ -541,6 +557,10 @@ _load(ImlibImage *im, int load_data)
{
voff = (npixels * 5) / 4;
}
+ else if (y4m.colour_space == Y4M_PARSE_CS_422P10)
+ {
+ voff = (npixels * 3) / 2;
+ }
else if (y4m.colour_space == Y4M_PARSE_CS_444P10)
{
voff = npixels * 2;
@@ -554,6 +574,10 @@ _load(ImlibImage *im, int load_data)
{
sdiv = 2;
}
+ else if (y4m.colour_space == Y4M_PARSE_CS_422P10)
+ {
+ sdiv = 2;
+ }
else if (y4m.colour_space == Y4M_PARSE_CS_444P10)
{
sdiv = 1;
@@ -567,6 +591,12 @@ _load(ImlibImage *im, int load_data)
y4m.v, y4m.v_stride, buf_y, buf_stride_y,
buf_u, buf_stride_u, buf_v, buf_stride_v, y4m.w, y4m.h);
}
+ else if (y4m.colour_space == Y4M_PARSE_CS_422P10)
+ {
+ I210ToI422(y4m.y, y4m.y_stride, y4m.u, y4m.u_stride,
+ y4m.v, y4m.v_stride, buf_y, buf_stride_y,
+ buf_u, buf_stride_u, buf_v, buf_stride_v, y4m.w, y4m.h);
+ }
else if (y4m.colour_space == Y4M_PARSE_CS_444P10)
{
I410ToI444(y4m.y, y4m.y_stride, y4m.u, y4m.u_stride,
diff --git a/test/images/img-8x8.yuv422p10.full_range.y4m b/test/images/img-8x8.yuv422p10.full_range.y4m
new file mode 100644
index 0000000..10ba15c
Binary files /dev/null and b/test/images/img-8x8.yuv422p10.full_range.y4m differ
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