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sws: Move yuv2rgb clipping into the tables.

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This fixes some cases where the clipping was entirely missing.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Thanks (for the comments and review) -to: Reimar, beastd, Ronald
This commit is contained in:
Michael Niedermayer 2012-01-10 20:56:15 +01:00
parent 7c4b397508
commit 0644cabd7a
3 changed files with 31 additions and 32 deletions
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31
libswscale/swscale.c
View File

@ -570,7 +570,7 @@ yuv2mono_X_c_template(SwsContext *c, const int16_t *lumFilter,
int y, enum PixelFormat target)
{
const uint8_t * const d128=dither_8x8_220[y&7];
uint8_t *g = c->table_gU[128] + c->table_gV[128];
uint8_t *g = c->table_gU[128 + YUVRGB_TABLE_HEADROOM] + c->table_gV[128 + YUVRGB_TABLE_HEADROOM];
int i;
unsigned acc = 0;
@ -606,7 +606,7 @@ yuv2mono_2_c_template(SwsContext *c, const int16_t *buf[2],
{
const int16_t *buf0 = buf[0], *buf1 = buf[1];
const uint8_t * const d128 = dither_8x8_220[y & 7];
uint8_t *g = c->table_gU[128] + c->table_gV[128];
uint8_t *g = c->table_gU[128 + YUVRGB_TABLE_HEADROOM] + c->table_gV[128 + YUVRGB_TABLE_HEADROOM];
int yalpha1 = 4095 - yalpha;
int i;
@ -630,7 +630,7 @@ yuv2mono_1_c_template(SwsContext *c, const int16_t *buf0,
int uvalpha, int y, enum PixelFormat target)
{
const uint8_t * const d128 = dither_8x8_220[y & 7];
uint8_t *g = c->table_gU[128] + c->table_gV[128];
uint8_t *g = c->table_gU[128 + YUVRGB_TABLE_HEADROOM] + c->table_gV[128 + YUVRGB_TABLE_HEADROOM];
int i;
for (i = 0; i < dstW - 7; i += 8) {
@ -1154,10 +1154,9 @@ yuv2rgb_X_c_template(SwsContext *c, const int16_t *lumFilter,
}
}
/* FIXME fix tables so that clipping is not needed and then use _NOCLIP*/
r = c->table_rV[V];
g = (c->table_gU[U] + c->table_gV[V]);
b = c->table_bU[U];
r = c->table_rV[V + YUVRGB_TABLE_HEADROOM];
g = (c->table_gU[U + YUVRGB_TABLE_HEADROOM] + c->table_gV[V + YUVRGB_TABLE_HEADROOM]);
b = c->table_bU[U + YUVRGB_TABLE_HEADROOM];
yuv2rgb_write(dest, i, Y1, Y2, hasAlpha ? A1 : 0, hasAlpha ? A2 : 0,
r, g, b, y, target, hasAlpha);
@ -1186,9 +1185,9 @@ yuv2rgb_2_c_template(SwsContext *c, const int16_t *buf[2],
int U = (ubuf0[i] * uvalpha1 + ubuf1[i] * uvalpha) >> 19;
int V = (vbuf0[i] * uvalpha1 + vbuf1[i] * uvalpha) >> 19;
int A1, A2;
const void *r = c->table_rV[V],
*g = (c->table_gU[U] + c->table_gV[V]),
*b = c->table_bU[U];
const void *r = c->table_rV[V + YUVRGB_TABLE_HEADROOM],
*g = (c->table_gU[U + YUVRGB_TABLE_HEADROOM] + c->table_gV[V + YUVRGB_TABLE_HEADROOM]),
*b = c->table_bU[U + YUVRGB_TABLE_HEADROOM];
if (hasAlpha) {
A1 = (abuf0[i * 2 ] * yalpha1 + abuf1[i * 2 ] * yalpha) >> 19;
@ -1218,9 +1217,9 @@ yuv2rgb_1_c_template(SwsContext *c, const int16_t *buf0,
int U = ubuf1[i] >> 7;
int V = vbuf1[i] >> 7;
int A1, A2;
const void *r = c->table_rV[V],
*g = (c->table_gU[U] + c->table_gV[V]),
*b = c->table_bU[U];
const void *r = c->table_rV[V + YUVRGB_TABLE_HEADROOM],
*g = (c->table_gU[U + YUVRGB_TABLE_HEADROOM] + c->table_gV[V + YUVRGB_TABLE_HEADROOM]),
*b = c->table_bU[U + YUVRGB_TABLE_HEADROOM];
if (hasAlpha) {
A1 = abuf0[i * 2 ] >> 7;
@ -1237,9 +1236,9 @@ yuv2rgb_1_c_template(SwsContext *c, const int16_t *buf0,
int U = (ubuf0[i] + ubuf1[i]) >> 8;
int V = (vbuf0[i] + vbuf1[i]) >> 8;
int A1, A2;
const void *r = c->table_rV[V],
*g = (c->table_gU[U] + c->table_gV[V]),
*b = c->table_bU[U];
const void *r = c->table_rV[V + YUVRGB_TABLE_HEADROOM],
*g = (c->table_gU[U + YUVRGB_TABLE_HEADROOM] + c->table_gV[V + YUVRGB_TABLE_HEADROOM]),
*b = c->table_bU[U + YUVRGB_TABLE_HEADROOM];
if (hasAlpha) {
A1 = abuf0[i * 2 ] >> 7;

10
libswscale/swscale_internal.h
View File

@ -34,6 +34,8 @@
#define STR(s) AV_TOSTRING(s) // AV_STRINGIFY is too long
#define YUVRGB_TABLE_HEADROOM 128
#define FAST_BGR2YV12 // use 7-bit instead of 15-bit coefficients
#define MAX_FILTER_SIZE 256
@ -317,10 +319,10 @@ typedef struct SwsContext {
int dstY; ///< Last destination vertical line output from last slice.
int flags; ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
void *yuvTable; // pointer to the yuv->rgb table start so it can be freed()
uint8_t *table_rV[256];
uint8_t *table_gU[256];
int table_gV[256];
uint8_t *table_bU[256];
uint8_t *table_rV[256 + 2*YUVRGB_TABLE_HEADROOM];
uint8_t *table_gU[256 + 2*YUVRGB_TABLE_HEADROOM];
int table_gV[256 + 2*YUVRGB_TABLE_HEADROOM];
uint8_t *table_bU[256 + 2*YUVRGB_TABLE_HEADROOM];
//Colorspace stuff
int contrast, brightness, saturation; // for sws_getColorspaceDetails

22
libswscale/yuv2rgb.c
View File

@ -62,9 +62,9 @@ const int *sws_getCoefficients(int colorspace)
#define LOADCHROMA(i) \
U = pu[i]; \
V = pv[i]; \
r = (void *)c->table_rV[V]; \
g = (void *)(c->table_gU[U] + c->table_gV[V]); \
b = (void *)c->table_bU[U];
r = (void *)c->table_rV[V+YUVRGB_TABLE_HEADROOM]; \
g = (void *)(c->table_gU[U+YUVRGB_TABLE_HEADROOM] + c->table_gV[V+YUVRGB_TABLE_HEADROOM]); \
b = (void *)c->table_bU[U+YUVRGB_TABLE_HEADROOM];
#define PUTRGB(dst,src,i) \
Y = src[2*i]; \
@ -479,7 +479,7 @@ CLOSEYUV2RGBFUNC(8)
YUV2RGBFUNC(yuv2rgb_c_1_ordered_dither, uint8_t, 0)
const uint8_t *d128 = dither_8x8_220[y&7];
char out_1 = 0, out_2 = 0;
g= c->table_gU[128] + c->table_gV[128];
g= c->table_gU[128 + YUVRGB_TABLE_HEADROOM] + c->table_gV[128 + YUVRGB_TABLE_HEADROOM];
#define PUTRGB1(out,src,i,o) \
Y = src[2*i]; \
@ -555,29 +555,27 @@ SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c)
return NULL;
}
static void fill_table(uint8_t* table[256], const int elemsize, const int inc, void *y_tab)
static void fill_table(uint8_t* table[256 + 2*YUVRGB_TABLE_HEADROOM], const int elemsize, const int inc, void *y_tab)
{
int i;
int64_t cb = 0;
uint8_t *y_table = y_tab;
y_table -= elemsize * (inc >> 9);
for (i = 0; i < 256; i++) {
for (i = 0; i < 256 + 2*YUVRGB_TABLE_HEADROOM; i++) {
int64_t cb = av_clip(i-YUVRGB_TABLE_HEADROOM, 0, 255)*inc;
table[i] = y_table + elemsize * (cb >> 16);
cb += inc;
}
}
static void fill_gv_table(int table[256], const int elemsize, const int inc)
static void fill_gv_table(int table[256 + 2*YUVRGB_TABLE_HEADROOM], const int elemsize, const int inc)
{
int i;
int64_t cb = 0;
int off = -(inc >> 9);
for (i = 0; i < 256; i++) {
for (i = 0; i < 256 + 2*YUVRGB_TABLE_HEADROOM; i++) {
int64_t cb = av_clip(i-YUVRGB_TABLE_HEADROOM, 0, 255)*inc;
table[i] = elemsize * (off + (cb >> 16));
cb += inc;
}
}