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Git pushed a commit to branch release/9.0
in repository ffmpeg.
The following commit(s) were added to refs/heads/release/9.0 by this push:
new d4070a14ce swscale/format: Build ff_sws_chroma_pos() even without
CONFIG_UNSTABLE
d4070a14ce is described below
commit d4070a14cecc7e29eb278f9b6036c2284255f70d
Author: Andreas Rheinhardt <[email protected]>
AuthorDate: Tue Jun 30 21:44:27 2026 +0200
Commit: Sven Püschel <[email protected]>
CommitDate: Fri Nov 6 14:20:42 2026 +0100
swscale/format: Build ff_sws_chroma_pos() even without CONFIG_UNSTABLE
It is used in add_legacy_sws_pass() in graph.c.
Signed-off-by: Andreas Rheinhardt <[email protected]>
Signed-off-by: Sven Püschel <[email protected]>
(cherry picked from commit fad1db043d45d4d3cc482934ac6cd579f556a6e8)
---
libswscale/format.c | 82 ++++++++++++++++++++++++++---------------------------
1 file changed, 41 insertions(+), 41 deletions(-)
diff --git a/libswscale/format.c b/libswscale/format.c
index b03cfff44a..70cc813dd7 100644
--- a/libswscale/format.c
+++ b/libswscale/format.c
@@ -551,6 +551,47 @@ bool ff_infer_colors(SwsColor *src, SwsColor *dst)
return incomplete;
}
+void ff_sws_chroma_pos(const SwsFormat *fmt, bool *incomplete,
+ int *out_x_pos, int *out_y_pos)
+{
+ enum AVChromaLocation chroma_loc = fmt->loc;
+ const int sub_x = fmt->desc->log2_chroma_w;
+ const int sub_y = fmt->desc->log2_chroma_h;
+ int x_pos, y_pos;
+
+ /* Explicitly default to center siting for compatibility with swscale */
+ if (chroma_loc == AVCHROMA_LOC_UNSPECIFIED) {
+ chroma_loc = AVCHROMA_LOC_CENTER;
+ *incomplete |= sub_x || sub_y;
+ }
+
+ /* av_chroma_location_enum_to_pos() always gives us values in the range
from
+ * 0 to 256, but we need to adjust this to the true value range of the
+ * subsampling grid, which may be larger for h/v_sub > 1 */
+ av_chroma_location_enum_to_pos(&x_pos, &y_pos, chroma_loc);
+ x_pos *= (1 << sub_x) - 1;
+ y_pos *= (1 << sub_y) - 1;
+
+ /* Fix vertical chroma position for interlaced frames */
+ if (sub_y && fmt->interlaced) {
+ /* When vertically subsampling, chroma samples are effectively only
+ * placed next to even rows. To access them from the odd field, we need
+ * to account for this shift by offsetting the distance of one luma
row.
+ *
+ * For 4x vertical subsampling (v_sub == 2), they are only placed
+ * next to every *other* even row, so we need to shift by three luma
+ * rows to get to the chroma sample. */
+ if (fmt->field == FIELD_BOTTOM)
+ y_pos += (256 << sub_y) - 256;
+
+ /* Luma row distance is doubled for fields, so halve offsets */
+ y_pos >>= 1;
+ }
+
+ *out_x_pos = x_pos;
+ *out_y_pos = y_pos;
+}
+
/* Variant of sws_test_format() for the ops-based code */
static int test_format_ops(enum AVPixelFormat format, int output);
static int test_format_legacy(enum AVPixelFormat format, int output)
@@ -1434,47 +1475,6 @@ linear_mat3(const AVRational m00, const AVRational m01,
const AVRational m02,
return c;
}
-void ff_sws_chroma_pos(const SwsFormat *fmt, bool *incomplete,
- int *out_x_pos, int *out_y_pos)
-{
- enum AVChromaLocation chroma_loc = fmt->loc;
- const int sub_x = fmt->desc->log2_chroma_w;
- const int sub_y = fmt->desc->log2_chroma_h;
- int x_pos, y_pos;
-
- /* Explicitly default to center siting for compatibility with swscale */
- if (chroma_loc == AVCHROMA_LOC_UNSPECIFIED) {
- chroma_loc = AVCHROMA_LOC_CENTER;
- *incomplete |= sub_x || sub_y;
- }
-
- /* av_chroma_location_enum_to_pos() always gives us values in the range
from
- * 0 to 256, but we need to adjust this to the true value range of the
- * subsampling grid, which may be larger for h/v_sub > 1 */
- av_chroma_location_enum_to_pos(&x_pos, &y_pos, chroma_loc);
- x_pos *= (1 << sub_x) - 1;
- y_pos *= (1 << sub_y) - 1;
-
- /* Fix vertical chroma position for interlaced frames */
- if (sub_y && fmt->interlaced) {
- /* When vertically subsampling, chroma samples are effectively only
- * placed next to even rows. To access them from the odd field, we need
- * to account for this shift by offsetting the distance of one luma
row.
- *
- * For 4x vertical subsampling (v_sub == 2), they are only placed
- * next to every *other* even row, so we need to shift by three luma
- * rows to get to the chroma sample. */
- if (fmt->field == FIELD_BOTTOM)
- y_pos += (256 << sub_y) - 256;
-
- /* Luma row distance is doubled for fields, so halve offsets */
- y_pos >>= 1;
- }
-
- *out_x_pos = x_pos;
- *out_y_pos = y_pos;
-}
-
int ff_sws_decode_colors(SwsContext *ctx, SwsPixelType type,
SwsOpList *ops, const SwsFormat *fmt, bool
*incomplete)
{
--
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