return filter;
}
+SwsVector *sws_allocVec(int length)
+{
+ SwsVector *vec = av_malloc(sizeof(SwsVector));
+ if (!vec)
+ return NULL;
+ vec->length = length;
+ vec->coeff = av_malloc(sizeof(double) * length);
+ if (!vec->coeff)
+ av_freep(&vec);
+ return vec;
+}
+
SwsVector *sws_getGaussianVec(double variance, double quality)
{
const int length= (int)(variance*quality + 0.5) | 1;
int i;
- double *coeff= av_malloc(length*sizeof(double));
double middle= (length-1)*0.5;
- SwsVector *vec= av_malloc(sizeof(SwsVector));
-
- vec->coeff= coeff;
- vec->length= length;
+ SwsVector *vec= sws_allocVec(length);
for (i=0; i<length; i++) {
double dist= i-middle;
- coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*PI);
+ vec->coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*PI);
}
sws_normalizeVec(vec, 1.0);
SwsVector *sws_getConstVec(double c, int length)
{
int i;
- double *coeff= av_malloc(length*sizeof(double));
- SwsVector *vec= av_malloc(sizeof(SwsVector));
-
- vec->coeff= coeff;
- vec->length= length;
+ SwsVector *vec= sws_allocVec(length);
for (i=0; i<length; i++)
- coeff[i]= c;
+ vec->coeff[i]= c;
return vec;
}
SwsVector *sws_cloneVec(SwsVector *a)
{
- double *coeff= av_malloc(a->length*sizeof(double));
int i;
- SwsVector *vec= av_malloc(sizeof(SwsVector));
-
- vec->coeff= coeff;
- vec->length= a->length;
+ SwsVector *vec= sws_allocVec(a->length);
- for (i=0; i<a->length; i++) coeff[i]= a->coeff[i];
+ for (i=0; i<a->length; i++) vec->coeff[i]= a->coeff[i];
return vec;
}
int *brightness, int *contrast, int *saturation);
/**
+ * Allocates and returns an uninitialized vector with length coefficients.
+ */
+SwsVector *sws_allocVec(int length);
+
+/**
* Returns a normalized Gaussian curve used to filter stuff
* quality=3 is high quality, lower is lower quality.
*/