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video: overlay-composition: blending micro-optimisation

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This commit is contained in:
Tim-Philipp Müller 2012-03-25 00:31:41 +00:00
parent 79953f27a8
commit 35a17ac152
1 changed files with 13 additions and 7 deletions
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20
gst-libs/gst/video/video-blend.c
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@ -1263,6 +1263,7 @@ void
video_blend_scale_linear_RGBA (GstBlendVideoFormatInfo * src,
gint dest_height, gint dest_width)
{
const guint8 *src_pixels;
int acc;
int y_increment;
int x_increment;
@ -1293,8 +1294,10 @@ video_blend_scale_linear_RGBA (GstBlendVideoFormatInfo * src,
#define LINE(x) ((tmpbuf) + (dest_size)*((x)&1))
src_pixels = src->pixels;
acc = 0;
orc_resample_bilinear_u32 (LINE (0), src->pixels, 0, x_increment, dest_width);
orc_resample_bilinear_u32 (LINE (0), src_pixels, 0, x_increment, dest_width);
y1 = 0;
for (i = 0; i < dest_height; i++) {
j = acc >> 16;
@ -1305,12 +1308,12 @@ video_blend_scale_linear_RGBA (GstBlendVideoFormatInfo * src,
} else {
if (j > y1) {
orc_resample_bilinear_u32 (LINE (j),
src->pixels + j * src_stride, 0, x_increment, dest_width);
src_pixels + j * src_stride, 0, x_increment, dest_width);
y1++;
}
if (j >= y1) {
orc_resample_bilinear_u32 (LINE (j + 1),
src->pixels + (j + 1) * src_stride, 0, x_increment, dest_width);
src_pixels + (j + 1) * src_stride, 0, x_increment, dest_width);
y1++;
}
orc_merge_linear_u8 (dest_pixels + i * dest_stride,
@ -1342,7 +1345,7 @@ gboolean
video_blend (GstBlendVideoFormatInfo * dest,
GstBlendVideoFormatInfo * src, guint x, guint y, gfloat global_alpha)
{
guint i, j, global_alpha_val;
guint i, j, global_alpha_val, src_width, src_height;
GetPutLine getputdest, getputsrc;
gint src_stride;
guint8 *tmpdestline = NULL, *tmpsrcline = NULL;
@ -1404,19 +1407,22 @@ video_blend (GstBlendVideoFormatInfo * dest,
if (y + src->height > dest->height)
src->height = dest->height - y;
src_width = src->width;
src_height = src->height;
/* Mainloop doing the needed conversions, and blending */
for (i = y; i < y + src->height; i++) {
for (i = y; i < y + src_height; i++) {
getputdest.getline (tmpdestline, dest, x, i);
getputsrc.getline (tmpsrcline, src, 0, (i - y));
getputsrc.matrix (tmpsrcline, src->width);
getputsrc.matrix (tmpsrcline, src_width);
/* Here dest and src are both either in AYUV or ARGB
* TODO: Make the orc version working properly*/
#define BLENDLOOP(blender,alpha_val,alpha_scale) \
do { \
for (j = 0; j < src->width * 4; j += 4) { \
for (j = 0; j < src_width * 4; j += 4) { \
guint8 alpha; \
\
alpha = (tmpsrcline[j] * alpha_val) / alpha_scale; \