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swscale: Add sws_alloc_set_opts()

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This simplifies allocating and initializing swscale contexts with custom options.
The function is internal currently but could be moved into the public header

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-08-08 12:36:49 +02:00
parent 7e9cd99627
commit c382d9e8cb
2 changed files with 30 additions and 4 deletions
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11
libswscale/swscale_internal.h
View File

@ -890,6 +890,17 @@ void ff_hcscale_fast_mmxext(SwsContext *c, int16_t *dst1, int16_t *dst2,
int dstWidth, const uint8_t *src1,
const uint8_t *src2, int srcW, int xInc);
/**
* Allocate and return an SwsContext.
* This is like sws_getContext() but does not perform the init step, allowing
* the user to set additional AVOptions.
*
* @see sws_getContext()
*/
struct SwsContext *sws_alloc_set_opts(int srcW, int srcH, enum AVPixelFormat srcFormat,
int dstW, int dstH, enum AVPixelFormat dstFormat,
int flags, const double *param);
static inline void fillPlane16(uint8_t *plane, int stride, int width, int height, int y,
int alpha, int bits, const int big_endian)
{

23
libswscale/utils.c
View File

@ -1632,10 +1632,9 @@ fail: // FIXME replace things by appropriate error codes
return -1;
}
SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat,
int dstW, int dstH, enum AVPixelFormat dstFormat,
int flags, SwsFilter *srcFilter,
SwsFilter *dstFilter, const double *param)
SwsContext *sws_alloc_set_opts(int srcW, int srcH, enum AVPixelFormat srcFormat,
int dstW, int dstH, enum AVPixelFormat dstFormat,
int flags, const double *param)
{
SwsContext *c;
@ -1655,6 +1654,22 @@ SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat,
c->param[1] = param[1];
}
return c;
}
SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat,
int dstW, int dstH, enum AVPixelFormat dstFormat,
int flags, SwsFilter *srcFilter,
SwsFilter *dstFilter, const double *param)
{
SwsContext *c;
c = sws_alloc_set_opts(srcW, srcH, srcFormat,
dstW, dstH, dstFormat,
flags, param);
if (!c)
return NULL;
if (sws_init_context(c, srcFilter, dstFilter) < 0) {
sws_freeContext(c);
return NULL;