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compositor/blend.c: fix MT checker pattern

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When filling the checker pattern from multiple threads, y_start
needs to be taken into account to determine the shade of the
current pixel.

Example pipeline:

gst-launch-1.0 videotestsrc ! video/x-raw, width=1920, height=1080, format=I420 ! \
  queue ! compositor sink_0::xpos=200 ! video/x-raw, format=I420 ! videoconvert ! \
  xvimagesink

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/988>
This commit is contained in:
Mathieu Duponchelle 2020-12-29 23:44:42 +01:00 committed by Mathieu Duponchelle
parent 247f821826
commit e0a4d3ac4e
1 changed files with 7 additions and 7 deletions
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14
gst/compositor/blend.c
View file

@ -428,7 +428,7 @@ fill_checker_##format_name (GstVideoFrame * frame, guint y_start, guint y_end) \
\
for (i = 0; i < comp_height; i++) { \
for (j = 0; j < comp_width; j++) { \
*p++ = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)]; \
*p++ = tab[(((i + y_start) & 0x8) >> 3) + ((j & 0x8) >> 3)]; \
} \
p += rowstride - comp_width; \
} \
@ -682,7 +682,7 @@ fill_checker_##format_name (GstVideoFrame * frame, guint y_start, guint y_end) \
\
for (i = 0; i < comp_height; i++) { \
for (j = 0; j < comp_width; j++) { \
*p++ = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)]; \
*p++ = tab[(((i + y_start) & 0x8) >> 3) + ((j & 0x8) >> 3)]; \
} \
p += rowstride - comp_width; \
} \
@ -845,9 +845,9 @@ fill_checker_##name##_c (GstVideoFrame * frame, guint y_start, guint y_end) \
dest += y_start * stride; \
for (i = 0; i < height; i++) { \
for (j = 0; j < width; j++) { \
dest[r] = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)]; /* red */ \
dest[g] = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)]; /* green */ \
dest[b] = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)]; /* blue */ \
dest[r] = tab[(((i + y_start) & 0x8) >> 3) + ((j & 0x8) >> 3)]; /* red */ \
dest[g] = tab[(((i + y_start) & 0x8) >> 3) + ((j & 0x8) >> 3)]; /* green */ \
dest[b] = tab[(((i + y_start) & 0x8) >> 3) + ((j & 0x8) >> 3)]; /* blue */ \
dest += bpp; \
} \
dest += dest_add; \
@ -1029,8 +1029,8 @@ fill_checker_##name##_c (GstVideoFrame * frame, guint y_start, guint y_end) \
dest += GST_VIDEO_FRAME_COMP_STRIDE (frame, 0) * y_start; \
for (i = 0; i < height; i++) { \
for (j = 0; j < width; j++) { \
dest[Y1] = tab[((i & 0x8) >> 3) + (((2 * j + 0) & 0x8) >> 3)]; \
dest[Y2] = tab[((i & 0x8) >> 3) + (((2 * j + 1) & 0x8) >> 3)]; \
dest[Y1] = tab[(((i + y_start) & 0x8) >> 3) + (((2 * j + 0) & 0x8) >> 3)]; \
dest[Y2] = tab[(((i + y_start) & 0x8) >> 3) + (((2 * j + 1) & 0x8) >> 3)]; \
dest[U] = 128; \
dest[V] = 128; \
dest += 4; \