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sws: share xyzgamma tables.

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They are currently always constant and thus theres no point to
store them in the context.
This makes the context 16kb smaller

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-05-01 17:45:33 +02:00
parent 4818388e6c
commit 2514b80045
2 changed files with 12 additions and 5 deletions
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4
libswscale/swscale_internal.h
View File

@ -478,8 +478,8 @@ typedef struct SwsContext {
/* pre defined color-spaces gamma */
#define XYZ_GAMMA (2.6f)
#define RGB_GAMMA (2.2f)
int16_t xyzgamma[4096];
int16_t rgbgamma[4096];
int16_t *xyzgamma;
int16_t *rgbgamma;
int16_t xyz2rgb_matrix[3][4];
/* function pointers for swScale() */

13
libswscale/utils.c
View File

@ -904,13 +904,20 @@ static void fill_xyztables(struct SwsContext *c)
{13270, -6295, -2041},
{-3969, 7682, 170},
{ 228, -835, 4329} };
static int16_t xyzgamma_tab[4096], rgbgamma_tab[4096];
memcpy(c->xyz2rgb_matrix, xyz2rgb_matrix, sizeof(c->xyz2rgb_matrix));
c->xyzgamma = xyzgamma_tab;
c->rgbgamma = rgbgamma_tab;
if (rgbgamma_tab[4095])
return;
/* set gamma vectors */
for (i = 0; i < 4096; i++) {
c->xyzgamma[i] = lrint(pow(i / 4095.0, xyzgamma) * 4095.0);
c->rgbgamma[i] = lrint(pow(i / 4095.0, rgbgamma) * 4095.0);
xyzgamma_tab[i] = lrint(pow(i / 4095.0, xyzgamma) * 4095.0);
rgbgamma_tab[i] = lrint(pow(i / 4095.0, rgbgamma) * 4095.0);
}
memcpy(c->xyz2rgb_matrix, xyz2rgb_matrix, sizeof(c->xyz2rgb_matrix));
}
int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],