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shapewipe: Replace floating point arithmetic in the inner processing loops by integer arithmetic

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Sebastian Dröge 2010-01-16 16:52:11 +01:00
parent 007b667366
commit e476ff9883
1 changed files with 32 additions and 16 deletions
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48
gst/shapewipe/gstshapewipe.c
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@ -749,7 +749,7 @@ gst_shape_wipe_do_qos (GstShapeWipe * self, GstClockTime timestamp)
return TRUE;
}
#define CREATE_AYUV_FUNCTIONS(depth, scale) \
#define CREATE_AYUV_FUNCTIONS(depth, shift) \
static GstFlowReturn \
gst_shape_wipe_blend_ayuv_##depth (GstShapeWipe * self, GstBuffer * inbuf, \
GstBuffer * maskbuf, GstBuffer * outbuf) \
@ -763,6 +763,7 @@ gst_shape_wipe_blend_ayuv_##depth (GstShapeWipe * self, GstBuffer * inbuf, \
gfloat position = self->mask_position; \
gfloat low = position - (self->mask_border / 2.0f); \
gfloat high = position + (self->mask_border / 2.0f); \
guint32 low_i, high_i, position_i, round_i; \
gint width = self->width, height = self->height; \
\
if (low < 0.0f) { \
@ -775,24 +776,31 @@ gst_shape_wipe_blend_ayuv_##depth (GstShapeWipe * self, GstBuffer * inbuf, \
high = 1.0f; \
} \
\
position_i = position * 65536; \
low_i = low * 65536; \
high_i = high * 65536; \
round_i = (high_i - low_i) >> 1; \
\
for (i = 0; i < height; i++) { \
for (j = 0; j < width; j++) { \
gfloat in = *mask / scale; \
guint32 in = *mask << shift; \
\
if (in < low) { \
if (in < low_i) { \
output[0] = 0x00; /* A */ \
output[1] = 0x00; /* Y */ \
output[2] = 0x80; /* U */ \
output[3] = 0x80; /* V */ \
} else if (in >= high) { \
} else if (in >= high_i) { \
output[0] = 0xff; /* A */ \
output[1] = input[1]; /* Y */ \
output[2] = input[2]; /* U */ \
output[3] = input[3]; /* V */ \
} else { \
gfloat val = 255.0f * ((in - low) / (high - low)); \
guint32 val; \
/* Note: This will never overflow or be larger than 255! */ \
val = ((((in - low_i) << 16) + round_i) / (high_i - low_i)) >> 8; \
\
output[0] = CLAMP (val, 0, 255); /* A */ \
output[0] = val; /* A */ \
output[1] = input[1]; /* Y */ \
output[2] = input[2]; /* U */ \
output[3] = input[3]; /* V */ \
@ -808,10 +816,10 @@ gst_shape_wipe_blend_ayuv_##depth (GstShapeWipe * self, GstBuffer * inbuf, \
return GST_FLOW_OK; \
}
CREATE_AYUV_FUNCTIONS (16, 65536.0f);
CREATE_AYUV_FUNCTIONS (8, 256.0f);
CREATE_AYUV_FUNCTIONS (16, 0);
CREATE_AYUV_FUNCTIONS (8, 8);
#define CREATE_ARGB_FUNCTIONS(depth, name, scale, a, r, g, b) \
#define CREATE_ARGB_FUNCTIONS(depth, name, shift, a, r, g, b) \
static GstFlowReturn \
gst_shape_wipe_blend_##name##_##depth (GstShapeWipe * self, GstBuffer * inbuf, \
GstBuffer * maskbuf, GstBuffer * outbuf) \
@ -825,6 +833,7 @@ gst_shape_wipe_blend_##name##_##depth (GstShapeWipe * self, GstBuffer * inbuf, \
gfloat position = self->mask_position; \
gfloat low = position - (self->mask_border / 2.0f); \
gfloat high = position + (self->mask_border / 2.0f); \
guint32 low_i, high_i, position_i, round_i; \
gint width = self->width, height = self->height; \
\
if (low < 0.0f) { \
@ -837,9 +846,14 @@ gst_shape_wipe_blend_##name##_##depth (GstShapeWipe * self, GstBuffer * inbuf, \
high = 1.0f; \
} \
\
position_i = position * 65536; \
low_i = low * 65536; \
high_i = high * 65536; \
round_i = (high_i - low_i) >> 1; \
\
for (i = 0; i < height; i++) { \
for (j = 0; j < width; j++) { \
gfloat in = *mask / scale; \
guint32 in = *mask << shift; \
\
if (in < low) { \
output[a] = 0x00; /* A */ \
@ -852,9 +866,11 @@ gst_shape_wipe_blend_##name##_##depth (GstShapeWipe * self, GstBuffer * inbuf, \
output[g] = input[g]; /* G */ \
output[b] = input[b]; /* B */ \
} else { \
gfloat val = 255.0f * ((in - low) / (high - low)); \
guint32 val; \
/* Note: This will never overflow or be larger than 255! */ \
val = ((((in - low_i) << 16) + round_i) / (high_i - low_i)) >> 8; \
\
output[a] = CLAMP (val, 0, 255); /* A */ \
output[a] = val; /* A */ \
output[r] = input[r]; /* R */ \
output[g] = input[g]; /* G */ \
output[b] = input[b]; /* B */ \
@ -870,11 +886,11 @@ gst_shape_wipe_blend_##name##_##depth (GstShapeWipe * self, GstBuffer * inbuf, \
return GST_FLOW_OK; \
}
CREATE_ARGB_FUNCTIONS (16, argb, 65536.0f, 0, 1, 2, 3);
CREATE_ARGB_FUNCTIONS (8, argb, 256.0f, 0, 1, 2, 3);
CREATE_ARGB_FUNCTIONS (16, argb, 0, 0, 1, 2, 3);
CREATE_ARGB_FUNCTIONS (8, argb, 8, 0, 1, 2, 3);
CREATE_ARGB_FUNCTIONS (16, bgra, 65536.0f, 3, 2, 1, 0);
CREATE_ARGB_FUNCTIONS (8, bgra, 256.0f, 3, 2, 1, 0);
CREATE_ARGB_FUNCTIONS (16, bgra, 0, 3, 2, 1, 0);
CREATE_ARGB_FUNCTIONS (8, bgra, 8, 3, 2, 1, 0);
static GstFlowReturn
gst_shape_wipe_video_sink_chain (GstPad * pad, GstBuffer * buffer)