summaryrefslogtreecommitdiff
path: root/thirdparty/misc/yuv2rgb.h
diff options
context:
space:
mode:
Diffstat (limited to 'thirdparty/misc/yuv2rgb.h')
-rw-r--r--thirdparty/misc/yuv2rgb.h121
1 files changed, 39 insertions, 82 deletions
diff --git a/thirdparty/misc/yuv2rgb.h b/thirdparty/misc/yuv2rgb.h
index 3ec8388246..d8f7fd6de2 100644
--- a/thirdparty/misc/yuv2rgb.h
+++ b/thirdparty/misc/yuv2rgb.h
@@ -24,6 +24,14 @@ does not infringe any patents that apply in your area before you
ship it.
*/
+/*
+ * Please note that this version has been modified for various reasons:
+ * 1. Using the Godot core typedefs
+ * 2. At some point or another the code relied on the byte order of a uint32_t, this has been fixed
+ * 3. Output has been reordered to struct { uint8_t r, g, b, a; } precisely in accordance with the function names
+ * 4. Removing unused 'dither' parameter
+ */
+
#ifndef YUV2RGB_H
#define YUV2RGB_H
@@ -803,6 +811,8 @@ static const uint32_t tables[256*3] = {
0xE6365800U
};
+/* -- Common -- */
+
#define FLAGS 0x40080100
#define READUV(U,V) (tables[256 + (U)] + tables[512 + (V)])
#define READY(Y) tables[Y]
@@ -820,12 +830,14 @@ do { \
#define STORE(Y,DSTPTR) \
do { \
- *(DSTPTR)++ = (Y); \
- *(DSTPTR)++ = (Y)>>22; \
*(DSTPTR)++ = (Y)>>11; \
- *(DSTPTR)++ = 255; \
+ *(DSTPTR)++ = (Y)>>22; \
+ *(DSTPTR)++ = (Y); \
+ *(DSTPTR)++ = 255; \
} while (0 == 1)
+/* -- End Common -- */
+
static void yuv422_2_rgb8888(uint8_t *dst_ptr,
const uint8_t *y_ptr,
const uint8_t *u_ptr,
@@ -834,8 +846,7 @@ static void yuv422_2_rgb8888(uint8_t *dst_ptr,
int32_t height,
int32_t y_span,
int32_t uv_span,
- int32_t dst_span,
- int32_t dither)
+ int32_t dst_span)
{
height -= 1;
while (height > 0)
@@ -909,35 +920,7 @@ static void yuv422_2_rgb8888(uint8_t *dst_ptr,
}
}
-
-#undef FLAGS
-#undef READUV
-#undef READY
-#undef FIXUP
-#undef STORE
-
-
-#define FLAGS 0x40080100
-#define READUV(U,V) (tables[256 + (U)] + tables[512 + (V)])
-#define READY(Y) tables[Y]
-#define FIXUP(Y) \
-do { \
- int tmp = (Y) & FLAGS; \
- if (tmp != 0) \
- { \
- tmp -= tmp>>8; \
- (Y) |= tmp; \
- tmp = FLAGS & ~(Y>>1); \
- (Y) += tmp>>8; \
- } \
-} while (0 == 1)
-
-#define STORE(Y,DSTPTR) \
-do { \
- (DSTPTR) = 0xFF000000 | (Y & 0xFF) | (0xFF00 & (Y>>14)) | (0xFF0000 & (Y<<5));\
-} while (0 == 1)
-
-static void yuv420_2_rgb8888(uint8_t *dst_ptr_,
+static void yuv420_2_rgb8888(uint8_t *dst_ptr,
const uint8_t *y_ptr,
const uint8_t *u_ptr,
const uint8_t *v_ptr,
@@ -945,12 +928,9 @@ static void yuv420_2_rgb8888(uint8_t *dst_ptr_,
int32_t height,
int32_t y_span,
int32_t uv_span,
- int32_t dst_span,
- int32_t dither)
+ int32_t dst_span)
{
- uint32_t *dst_ptr = (uint32_t *)(void *)dst_ptr_;
- dst_span >>= 2;
-
+ /* The 'dst_ptr as uint32_t' thing is not endianness-aware, so that's been removed. */
height -= 1;
while (height > 0)
{
@@ -960,36 +940,38 @@ static void yuv420_2_rgb8888(uint8_t *dst_ptr_,
{
/* Do 2 column pairs */
uint32_t uv, y0, y1;
+ uint8_t * dst_ptr_1span = dst_ptr + dst_span;
uv = READUV(*u_ptr++,*v_ptr++);
y1 = uv + READY(y_ptr[y_span]);
y0 = uv + READY(*y_ptr++);
FIXUP(y1);
FIXUP(y0);
- STORE(y1, dst_ptr[dst_span]);
- STORE(y0, *dst_ptr++);
+ STORE(y1, dst_ptr_1span);
+ STORE(y0, dst_ptr);
y1 = uv + READY(y_ptr[y_span]);
y0 = uv + READY(*y_ptr++);
FIXUP(y1);
FIXUP(y0);
- STORE(y1, dst_ptr[dst_span]);
- STORE(y0, *dst_ptr++);
+ STORE(y1, dst_ptr_1span);
+ STORE(y0, dst_ptr);
height += (2<<16);
}
if ((height>>16) == 0)
{
/* Trailing column pair */
uint32_t uv, y0, y1;
+ uint8_t * dst_ptr_1span = dst_ptr + dst_span;
uv = READUV(*u_ptr,*v_ptr);
y1 = uv + READY(y_ptr[y_span]);
y0 = uv + READY(*y_ptr++);
FIXUP(y1);
FIXUP(y0);
- STORE(y0, dst_ptr[dst_span]);
- STORE(y1, *dst_ptr++);
+ STORE(y0, dst_ptr_1span);
+ STORE(y1, dst_ptr);
}
- dst_ptr += dst_span*2-width;
+ dst_ptr += (dst_span * 2) - (width * 4);
y_ptr += y_span*2-width;
u_ptr += uv_span-(width>>1);
v_ptr += uv_span-(width>>1);
@@ -1011,8 +993,8 @@ static void yuv420_2_rgb8888(uint8_t *dst_ptr_,
y0 = uv + READY(*y_ptr++);
FIXUP(y1);
FIXUP(y0);
- STORE(y1, *dst_ptr++);
- STORE(y0, *dst_ptr++);
+ STORE(y1, dst_ptr);
+ STORE(y0, dst_ptr);
height += (2<<16);
}
if ((height>>16) == 0)
@@ -1023,42 +1005,11 @@ static void yuv420_2_rgb8888(uint8_t *dst_ptr_,
uv = READUV(*u_ptr++,*v_ptr++);
y0 = uv + READY(*y_ptr++);
FIXUP(y0);
- STORE(y0, *dst_ptr++);
+ STORE(y0, dst_ptr);
}
}
}
-
-
-#undef FLAGS
-#undef READUV
-#undef READY
-#undef FIXUP
-#undef STORE
-
-#define FLAGS 0x40080100
-#define READUV(U,V) (tables[256 + (U)] + tables[512 + (V)])
-#define READY(Y) tables[Y]
-#define FIXUP(Y) \
-do { \
- int tmp = (Y) & FLAGS; \
- if (tmp != 0) \
- { \
- tmp -= tmp>>8; \
- (Y) |= tmp; \
- tmp = FLAGS & ~(Y>>1); \
- (Y) += tmp>>8; \
- } \
-} while (0 == 1)
-
-#define STORE(Y,DSTPTR) \
-do { \
- *(DSTPTR)++ = (Y); \
- *(DSTPTR)++ = (Y)>>22; \
- *(DSTPTR)++ = (Y)>>11; \
- *(DSTPTR)++ = 255; \
-} while (0 == 1)
-
static void yuv444_2_rgb8888(uint8_t *dst_ptr,
const uint8_t *y_ptr,
const uint8_t *u_ptr,
@@ -1067,8 +1018,7 @@ static void yuv444_2_rgb8888(uint8_t *dst_ptr,
int32_t height,
int32_t y_span,
int32_t uv_span,
- int32_t dst_span,
- int32_t dither)
+ int32_t dst_span)
{
height -= 1;
while (height > 0)
@@ -1143,4 +1093,11 @@ static void yuv444_2_rgb8888(uint8_t *dst_ptr,
height -= 1;
}
}
+
+#undef FLAGS
+#undef READUV
+#undef READY
+#undef FIXUP
+#undef STORE
+
#endif // YUV2RGB_H
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 15:34:30 +0000