Currently, packed30togbra10() always sets the alpha value to 0xFFFF,
without taking the bit depth into consideration.
This commit restricts the alpha value to the bit depth.
---
libswscale/swscale_unscaled.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/libswscale/swscale_unscaled.c b/libswscale/swscale_unscaled.c
index 307e5471a9..8d71a88c23 100644
--- a/libswscale/swscale_unscaled.c
+++ b/libswscale/swscale_unscaled.c
@@ -818,6 +818,7 @@ static void packed30togbra10(const uint8_t *src, int
srcStride,
int x, h, i;
int dst_alpha = dst[3] != NULL;
int scale_high = bpc - 10, scale_low = 10 - scale_high;
+ uint16_t alpha_val = (1U << bpc) - 1;
for (h = 0; h < srcSliceH; h++) {
uint32_t *src_line = (uint32_t *)(src + srcStride * h);
unsigned component;
@@ -834,7 +835,7 @@ static void packed30togbra10(const uint8_t *src, int
srcStride,
dst[1][x] = av_bswap16(component << scale_high | component
>> scale_low);
component = p & 0x3FF;
dst[2][x] = av_bswap16(component << scale_high | component
>> scale_low);
- dst[3][x] = 0xFFFF;
+ dst[3][x] = av_bswap16(alpha_val);
src_line++;
}
} else {
@@ -860,7 +861,7 @@ static void packed30togbra10(const uint8_t *src, int
srcStride,
dst[1][x] = component << scale_high | component >>
scale_low;
component = p & 0x3FF;
dst[2][x] = component << scale_high | component >>
scale_low;
- dst[3][x] = 0xFFFF;
+ dst[3][x] = alpha_val;
src_line++;
}
} else {
--
2.30.2
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