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alpha: Correctly clamp after YUV->RGB conversion

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This commit is contained in:
Sebastian Dröge 2010-04-22 15:42:03 +02:00
parent 545b21c9bd
commit 1897ab2928
1 changed files with 33 additions and 25 deletions
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58
gst/alpha/gstalpha.c
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@ -1523,6 +1523,7 @@ gst_alpha_set_planar_yuv_argb (const guint8 * src, guint8 * dest, gint width,
gint v_subs, h_subs;
gint matrix[12];
gint a, y, u, v;
gint r, g, b;
gint p[4];
p[0] =
@ -1585,9 +1586,12 @@ gst_alpha_set_planar_yuv_argb (const guint8 * src, guint8 * dest, gint width,
v = srcV[0];
dest[p[0]] = a;
dest[p[1]] = APPLY_MATRIX (matrix, 0, y, u, v);
dest[p[2]] = APPLY_MATRIX (matrix, 1, y, u, v);
dest[p[3]] = APPLY_MATRIX (matrix, 2, y, u, v);
r = APPLY_MATRIX (matrix, 0, y, u, v);
g = APPLY_MATRIX (matrix, 1, y, u, v);
b = APPLY_MATRIX (matrix, 2, y, u, v);
dest[p[1]] = CLAMP (r, 0, 255);
dest[p[2]] = CLAMP (g, 0, 255);
dest[p[3]] = CLAMP (b, 0, 255);
dest += 4;
srcY++;
@ -1618,6 +1622,7 @@ gst_alpha_chroma_key_planar_yuv_argb (const guint8 * src, guint8 * dest,
const guint8 *srcV, *srcV_tmp;
gint i, j;
gint a, y, u, v;
gint r, g, b;
gint src_wrap, src_uv_wrap;
gint y_stride, uv_stride;
gint v_subs, h_subs;
@ -1699,10 +1704,13 @@ gst_alpha_chroma_key_planar_yuv_argb (const guint8 * src, guint8 * dest,
u += 128;
v += 128;
dest[0] = a;
dest[1] = APPLY_MATRIX (matrix, 0, y, u, v);
dest[2] = APPLY_MATRIX (matrix, 1, y, u, v);
dest[3] = APPLY_MATRIX (matrix, 2, y, u, v);
dest[p[0]] = a;
r = APPLY_MATRIX (matrix, 0, y, u, v);
g = APPLY_MATRIX (matrix, 1, y, u, v);
b = APPLY_MATRIX (matrix, 2, y, u, v);
dest[p[1]] = CLAMP (r, 0, 255);
dest[p[2]] = CLAMP (g, 0, 255);
dest[p[3]] = CLAMP (b, 0, 255);
dest += 4;
srcY++;
@ -2045,18 +2053,18 @@ gst_alpha_set_packed_422_argb (const guint8 * src, guint8 * dest, gint width,
b = APPLY_MATRIX (matrix, 2, src[o[0]], src[o[1]], src[o[3]]);
dest[p[0]] = s_alpha;
dest[p[1]] = r;
dest[p[2]] = g;
dest[p[3]] = b;
dest[p[1]] = CLAMP (r, 0, 255);
dest[p[2]] = CLAMP (g, 0, 255);
dest[p[3]] = CLAMP (b, 0, 255);
r = APPLY_MATRIX (matrix, 0, src[o[2]], src[o[1]], src[o[3]]);
g = APPLY_MATRIX (matrix, 1, src[o[2]], src[o[1]], src[o[3]]);
b = APPLY_MATRIX (matrix, 2, src[o[2]], src[o[1]], src[o[3]]);
dest[4 + p[0]] = s_alpha;
dest[4 + p[1]] = r;
dest[4 + p[2]] = g;
dest[4 + p[3]] = b;
dest[4 + p[1]] = CLAMP (r, 0, 255);
dest[4 + p[2]] = CLAMP (g, 0, 255);
dest[4 + p[3]] = CLAMP (b, 0, 255);
dest += 8;
src += 4;
@ -2068,9 +2076,9 @@ gst_alpha_set_packed_422_argb (const guint8 * src, guint8 * dest, gint width,
b = APPLY_MATRIX (matrix, 2, src[o[0]], src[o[1]], src[o[3]]);
dest[p[0]] = s_alpha;
dest[p[1]] = r;
dest[p[2]] = g;
dest[p[3]] = b;
dest[p[1]] = CLAMP (r, 0, 255);
dest[p[2]] = CLAMP (g, 0, 255);
dest[p[3]] = CLAMP (b, 0, 255);
dest += 4;
}
@ -2152,9 +2160,9 @@ gst_alpha_chroma_key_packed_422_argb (const guint8 * src, guint8 * dest,
b = APPLY_MATRIX (matrix, 2, y, u, v);
dest[p[0]] = a;
dest[p[1]] = r;
dest[p[2]] = g;
dest[p[3]] = b;
dest[p[1]] = CLAMP (r, 0, 255);
dest[p[2]] = CLAMP (g, 0, 255);
dest[p[3]] = CLAMP (b, 0, 255);
y = src[o[2]];
u = src[o[1]] - 128;
@ -2171,9 +2179,9 @@ gst_alpha_chroma_key_packed_422_argb (const guint8 * src, guint8 * dest,
b = APPLY_MATRIX (matrix, 2, y, u, v);
dest[4 + p[0]] = a;
dest[4 + p[1]] = r;
dest[4 + p[2]] = g;
dest[4 + p[3]] = b;
dest[4 + p[1]] = CLAMP (r, 0, 255);
dest[4 + p[2]] = CLAMP (g, 0, 255);
dest[4 + p[3]] = CLAMP (b, 0, 255);
dest += 8;
src += 4;
@ -2195,9 +2203,9 @@ gst_alpha_chroma_key_packed_422_argb (const guint8 * src, guint8 * dest,
b = APPLY_MATRIX (matrix, 2, y, u, v);
dest[p[0]] = a;
dest[p[1]] = r;
dest[p[2]] = g;
dest[p[3]] = b;
dest[p[1]] = CLAMP (r, 0, 255);
dest[p[2]] = CLAMP (g, 0, 255);
dest[p[3]] = CLAMP (b, 0, 255);
dest += 4;
}