#define LIBSWSCALE_IDENT "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
/**
- * Returns the LIBSWSCALE_VERSION_INT constant.
+ * Return the LIBSWSCALE_VERSION_INT constant.
*/
unsigned swscale_version(void);
/**
- * Returns the libswscale build-time configuration.
+ * Return the libswscale build-time configuration.
*/
const char *swscale_configuration(void);
/**
- * Returns the libswscale license.
+ * Return the libswscale license.
*/
const char *swscale_license(void);
#define SWS_CS_DEFAULT 5
/**
- * Returns a pointer to yuv<->rgb coefficients for the given colorspace
+ * Return a pointer to yuv<->rgb coefficients for the given colorspace
* suitable for sws_setColorspaceDetails().
*
* @param colorspace One of the SWS_CS_* macros. If invalid,
struct SwsContext;
/**
- * Returns a positive value if pix_fmt is a supported input format, 0
+ * Return a positive value if pix_fmt is a supported input format, 0
* otherwise.
*/
int sws_isSupportedInput(enum PixelFormat pix_fmt);
/**
- * Returns a positive value if pix_fmt is a supported output format, 0
+ * Return a positive value if pix_fmt is a supported output format, 0
* otherwise.
*/
int sws_isSupportedOutput(enum PixelFormat pix_fmt);
/**
- * Frees the swscaler context swsContext.
- * If swsContext is NULL, then does nothing.
+ * Free the swscaler context swsContext.
+ * If swsContext is NULL, then do nothing.
*/
void sws_freeContext(struct SwsContext *swsContext);
/**
- * Allocates and returns a SwsContext. You need it to perform
+ * Allocate and return a SwsContext. You need it to perform
* scaling/conversion operations using sws_scale().
*
* @param srcW the width of the source image
SwsFilter *dstFilter, const double *param);
/**
- * Scales the image slice in srcSlice and puts the resulting scaled
+ * Scale the image slice in srcSlice and put the resulting scaled
* slice in the image in dst. A slice is a sequence of consecutive
* rows in an image.
*
SwsVector *sws_allocVec(int length);
/**
- * Returns a normalized Gaussian curve used to filter stuff
+ * Return a normalized Gaussian curve used to filter stuff
* quality=3 is high quality, lower is lower quality.
*/
SwsVector *sws_getGaussianVec(double variance, double quality);
/**
- * Allocates and returns a vector with length coefficients, all
+ * Allocate and return a vector with length coefficients, all
* with the same value c.
*/
SwsVector *sws_getConstVec(double c, int length);
/**
- * Allocates and returns a vector with just one coefficient, with
+ * Allocate and return a vector with just one coefficient, with
* value 1.0.
*/
SwsVector *sws_getIdentityVec(void);
/**
- * Scales all the coefficients of a by the scalar value.
+ * Scale all the coefficients of a by the scalar value.
*/
void sws_scaleVec(SwsVector *a, double scalar);
/**
- * Scales all the coefficients of a so that their sum equals height.
+ * Scale all the coefficients of a so that their sum equals height.
*/
void sws_normalizeVec(SwsVector *a, double height);
void sws_convVec(SwsVector *a, SwsVector *b);
void sws_shiftVec(SwsVector *a, int shift);
/**
- * Allocates and returns a clone of the vector a, that is a vector
+ * Allocate and return a clone of the vector a, that is a vector
* with the same coefficients as a.
*/
SwsVector *sws_cloneVec(SwsVector *a);
#endif
/**
- * Prints with av_log() a textual representation of the vector a
+ * Print with av_log() a textual representation of the vector a
* if log_level <= av_log_level.
*/
void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level);
void sws_freeFilter(SwsFilter *filter);
/**
- * Checks if context can be reused, otherwise reallocates a new
+ * Check if context can be reused, otherwise reallocate a new
* one.
*
- * If context is NULL, just calls sws_getContext() to get a new
- * context. Otherwise, checks if the parameters are the ones already
- * saved in context. If that is the case, returns the current
- * context. Otherwise, frees context and gets a new context with
+ * If context is NULL, just call sws_getContext() to get a new
+ * context. Otherwise, check if the parameters are the ones already
+ * saved in context. If that is the case, return the current
+ * context. Otherwise, free context and get a new context with
* the new parameters.
*
* Be warned that srcFilter and dstFilter are not checked, they
SwsFilter *dstFilter, const double *param);
/**
- * Converts an 8bit paletted frame into a frame with a color depth of 32-bits.
+ * Convert an 8bit paletted frame into a frame with a color depth of 32-bits.
*
* The output frame will have the same packed format as the palette.
*
void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette);
/**
- * Converts an 8bit paletted frame into a frame with a color depth of 24 bits.
+ * Convert an 8bit paletted frame into a frame with a color depth of 24 bits.
*
* With the palette format "ABCD", the destination frame ends up with the format "ABC".
*
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