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alpha: Remove some unneeded calculations and instance struct fields

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And document the instance struct fields a bit better
This commit is contained in:
Sebastian Dröge 2010-03-19 18:18:08 +01:00
parent 6b0c535e8d
commit 46025bbd8f
2 changed files with 14 additions and 14 deletions
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14
gst/alpha/gstalpha.c
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@ -737,17 +737,17 @@ gst_alpha_chroma_key_i420 (const guint8 * src, guint8 * dest, gint width,
static void
gst_alpha_init_params (GstAlpha * alpha)
{
float kgl;
float tmp;
float tmp1, tmp2;
gfloat kgl;
gfloat tmp;
gfloat tmp1, tmp2;
gfloat y;
const gint *matrix;
matrix =
(alpha->out_sdtv) ? cog_rgb_to_ycbcr_matrix_8bit_sdtv :
cog_rgb_to_ycbcr_matrix_8bit_hdtv;
alpha->y =
(matrix[0] * ((gint) alpha->target_r) +
y = (matrix[0] * ((gint) alpha->target_r) +
matrix[1] * ((gint) alpha->target_g) +
matrix[2] * ((gint) alpha->target_b) + matrix[3]) >> 8;
/* Cb,Cr without offset here because the chroma keying
@ -766,8 +766,6 @@ gst_alpha_init_params (GstAlpha * alpha)
alpha->cb = 127 * (tmp1 / kgl);
alpha->cr = 127 * (tmp2 / kgl);
alpha->accept_angle_cos = cos (M_PI * alpha->angle / 180);
alpha->accept_angle_sin = sin (M_PI * alpha->angle / 180);
tmp = 15 * tan (M_PI * alpha->angle / 180);
tmp = MIN (tmp, 255);
alpha->accept_angle_tg = tmp;
@ -776,7 +774,7 @@ gst_alpha_init_params (GstAlpha * alpha)
alpha->accept_angle_ctg = tmp;
tmp = 1 / (kgl);
alpha->one_over_kc = 255 * 2 * tmp - 255;
tmp = 15 * (float) (alpha->y) / kgl;
tmp = 15 * y / kgl;
tmp = MIN (tmp, 255);
alpha->kfgy_scale = tmp;
alpha->kg = MIN (kgl, 127);

14
gst/alpha/gstalpha.h
View file

@ -60,11 +60,14 @@ struct _GstAlpha
{
GstVideoFilter parent;
/* <private> */
/* caps */
GstVideoFormat in_format, out_format;
gint width, height;
gboolean in_sdtv, out_sdtv;
/* properties */
gdouble alpha;
guint target_r;
@ -75,21 +78,20 @@ struct _GstAlpha
gfloat angle;
gfloat noise_level;
guint noise_level2;
guint black_sensitivity;
guint white_sensitivity;
gfloat y; /* chroma color */
/* processing function */
void (*process) (const guint8 *src, guint8 *dest, gint width, gint height, GstAlpha *alpha);
/* precalculated values for chroma keying */
gint8 cb, cr;
gint8 kg;
gfloat accept_angle_cos;
gfloat accept_angle_sin;
guint8 accept_angle_tg;
guint8 accept_angle_ctg;
guint8 one_over_kc;
guint8 kfgy_scale;
void (*process) (const guint8 *src, guint8 *dest, gint width, gint height, GstAlpha *alpha);
guint noise_level2;
};
struct _GstAlphaClass