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Add 16 and 15-bit RGB formats

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Original commit message from CVS:
Add 16 and 15-bit RGB formats
This commit is contained in:
David Schleef 2003-04-22 07:39:34 +00:00
parent 856cea1d53
commit 00494ba94f
1 changed files with 65 additions and 0 deletions
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65
gst/videoscale/videoscale.c
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@ -51,6 +51,7 @@ static void gst_videoscale_packed422 (GstVideoscale *scale, unsigned char *dest,
static void gst_videoscale_packed422rev (GstVideoscale *scale, unsigned char *dest, unsigned char *src);
static void gst_videoscale_32bit (GstVideoscale *scale, unsigned char *dest, unsigned char *src);
static void gst_videoscale_24bit (GstVideoscale *scale, unsigned char *dest, unsigned char *src);
static void gst_videoscale_16bit (GstVideoscale *scale, unsigned char *dest, unsigned char *src);
static void gst_videoscale_scale_nearest_str2 (GstVideoscale *scale,
unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh);
@ -60,6 +61,8 @@ static void gst_videoscale_scale_nearest_32bit (GstVideoscale *scale,
unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh);
static void gst_videoscale_scale_nearest_24bit (GstVideoscale *scale,
unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh);
static void gst_videoscale_scale_nearest_16bit (GstVideoscale *scale,
unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh);
struct videoscale_format_struct videoscale_formats[] = {
/* packed */
@ -81,6 +84,8 @@ struct videoscale_format_struct videoscale_formats[] = {
{ "RGB ", 32, gst_videoscale_32bit, 24, G_BIG_ENDIAN, 0x0000ff00, 0x00ff0000, 0xff000000 },
{ "RGB ", 24, gst_videoscale_24bit, 24, G_BIG_ENDIAN, 0xff0000, 0x00ff00, 0x0000ff },
{ "RGB ", 24, gst_videoscale_24bit, 24, G_BIG_ENDIAN, 0x0000ff, 0x00ff00, 0xff0000 },
{ "RGB ", 16, gst_videoscale_16bit, 16, G_BYTE_ORDER, 0xf800, 0x07e0, 0x001f },
{ "RGB ", 16, gst_videoscale_16bit, 15, G_BYTE_ORDER, 0x7c00, 0x03e0, 0x001f },
};
int videoscale_n_formats = sizeof(videoscale_formats)/sizeof(videoscale_formats[0]);
@ -298,6 +303,20 @@ gst_videoscale_24bit (GstVideoscale *scale, unsigned char *dest, unsigned char *
}
static void
gst_videoscale_16bit (GstVideoscale *scale, unsigned char *dest, unsigned char *src)
{
int sw = scale->from_width;
int sh = scale->from_height;
int dw = scale->to_width;
int dh = scale->to_height;
GST_DEBUG (0,"videoscale: scaling 16bit %dx%d to %dx%d", sw, sh, dw, dh);
gst_videoscale_scale_nearest_16bit(scale, dest, src, sw, sh, dw, dh);
}
#define RC(x,y) *(src+(int)(x)+(int)((y)*sw))
static unsigned char
@ -671,3 +690,49 @@ gst_videoscale_scale_nearest_24bit (GstVideoscale *scale,
}
}
static void
gst_videoscale_scale_nearest_16bit (GstVideoscale *scale,
unsigned char *dest,
unsigned char *src,
int sw, int sh, int dw, int dh)
{
int ypos, yinc, y;
int xpos, xinc, x;
guchar *destp = dest;
guchar *srcp = src;
GST_DEBUG (0, "videoscale: scaling nearest %p %p %d", src, dest, dw);
ypos = 0x10000;
yinc = (sh<<16)/dh;
xinc = (sw<<16)/dw;
for (y = dh; y; y--) {
while (ypos >0x10000) {
ypos-=0x10000;
src += sw*2;
}
xpos = 0x10000;
srcp = src;
destp = dest;
for ( x=dw; x; x-- ) {
while ( xpos >= 0x10000L ) {
srcp+=2;
xpos -= 0x10000L;
}
destp[0] = srcp[0];
destp[1] = srcp[1];
destp+=2;
xpos += xinc;
}
dest += dw*2;
ypos += yinc;
}
}