* external api for the swscale stuff
*/
+#include <stdint.h>
+
#include "libavutil/avutil.h"
#include "libavutil/log.h"
#include "libavutil/pixfmt.h"
-
-#define LIBSWSCALE_VERSION_MAJOR 2
-#define LIBSWSCALE_VERSION_MINOR 0
-#define LIBSWSCALE_VERSION_MICRO 0
-
-#define LIBSWSCALE_VERSION_INT AV_VERSION_INT(LIBSWSCALE_VERSION_MAJOR, \
- LIBSWSCALE_VERSION_MINOR, \
- LIBSWSCALE_VERSION_MICRO)
-#define LIBSWSCALE_VERSION AV_VERSION(LIBSWSCALE_VERSION_MAJOR, \
- LIBSWSCALE_VERSION_MINOR, \
- LIBSWSCALE_VERSION_MICRO)
-#define LIBSWSCALE_BUILD LIBSWSCALE_VERSION_INT
-
-#define LIBSWSCALE_IDENT "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
-
-/**
- * Those FF_API_* defines are not part of public API.
- * They may change, break or disappear at any time.
- */
-#ifndef FF_API_SWS_GETCONTEXT
-#define FF_API_SWS_GETCONTEXT (LIBSWSCALE_VERSION_MAJOR < 3)
-#endif
-#ifndef FF_API_SWS_CPU_CAPS
-#define FF_API_SWS_CPU_CAPS (LIBSWSCALE_VERSION_MAJOR < 3)
-#endif
+#include "version.h"
/**
- * 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);
* are only provided for API compatibility.
*/
#define SWS_CPU_CAPS_MMX 0x80000000
+#define SWS_CPU_CAPS_MMXEXT 0x20000000
+#if LIBSWSCALE_VERSION_MAJOR < 3
#define SWS_CPU_CAPS_MMX2 0x20000000
+#endif
#define SWS_CPU_CAPS_3DNOW 0x40000000
#define SWS_CPU_CAPS_ALTIVEC 0x10000000
#define SWS_CPU_CAPS_BFIN 0x01000000
#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,
*/
const int *sws_getCoefficients(int colorspace);
-
// when used for filters they must have an odd number of elements
// coeffs cannot be shared between vectors
-typedef struct {
+typedef struct SwsVector {
double *coeff; ///< pointer to the list of coefficients
int length; ///< number of coefficients in the vector
} SwsVector;
// vectors can be shared
-typedef struct {
+typedef struct SwsFilter {
SwsVector *lumH;
SwsVector *lumV;
SwsVector *chrH;
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);
+int sws_isSupportedInput(enum AVPixelFormat 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);
+int sws_isSupportedOutput(enum AVPixelFormat pix_fmt);
/**
- * Allocates an empty SwsContext. This must be filled and passed to
+ * Allocate an empty SwsContext. This must be filled and passed to
* sws_init_context(). For filling see AVOptions, options.c and
* sws_setColorspaceDetails().
*/
struct SwsContext *sws_alloc_context(void);
/**
- * Initializes the swscaler context sws_context.
+ * Initialize the swscaler context sws_context.
*
* @return zero or positive value on success, a negative value on
* error
int sws_init_context(struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter);
/**
- * Frees the swscaler context swsContext.
+ * Free the swscaler context swsContext.
* If swsContext is NULL, then does nothing.
*/
void sws_freeContext(struct SwsContext *swsContext);
#if FF_API_SWS_GETCONTEXT
/**
- * Allocates and returns a SwsContext. You need it to perform
+ * Allocate and return an SwsContext. You need it to perform
* scaling/conversion operations using sws_scale().
*
* @param srcW the width of the source image
* written
* @deprecated Use sws_getCachedContext() instead.
*/
-struct SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
- int dstW, int dstH, enum PixelFormat dstFormat,
+struct 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);
#endif
/**
- * 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.
*
* top-bottom or bottom-top order. If slices are provided in
* non-sequential order the behavior of the function is undefined.
*
- * @param context the scaling context previously created with
+ * @param c the scaling context previously created with
* sws_getContext()
* @param srcSlice the array containing the pointers to the planes of
* the source slice
* the destination image
* @return the height of the output slice
*/
-int sws_scale(struct SwsContext *context, const uint8_t* const srcSlice[], const int srcStride[],
- int srcSliceY, int srcSliceH, uint8_t* const dst[], const int dstStride[]);
+int sws_scale(struct SwsContext *c, const uint8_t *const srcSlice[],
+ const int srcStride[], int srcSliceY, int srcSliceH,
+ uint8_t *const dst[], const int dstStride[]);
/**
* @param inv_table the yuv2rgb coefficients, normally ff_yuv2rgb_coeffs[x]
int *brightness, int *contrast, int *saturation);
/**
- * Allocates and returns an uninitialized vector with length coefficients.
+ * Allocate and return 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.
+ * 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);
/**
- * 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
- * one.
+ * 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
* are assumed to remain the same.
*/
struct SwsContext *sws_getCachedContext(struct SwsContext *context,
- int srcW, int srcH, enum PixelFormat srcFormat,
- int dstW, int dstH, enum PixelFormat dstFormat,
+ int srcW, int srcH, enum AVPixelFormat srcFormat,
+ int dstW, int dstH, enum AVPixelFormat dstFormat,
int flags, SwsFilter *srcFilter,
SwsFilter *dstFilter, const double *param);
/**
- * Converts an 8bit paletted frame into a frame with a color depth of 32-bits.
+ * Convert an 8-bit 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, int num_pixels, const uint8_t *palette);
/**
- * Converts an 8bit paletted frame into a frame with a color depth of 24 bits.
+ * Convert an 8-bit 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".
*
*/
void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette);
+/**
+ * Get the AVClass for swsContext. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
+ *
+ * @see av_opt_find().
+ */
+const AVClass *sws_get_class(void);
#endif /* SWSCALE_SWSCALE_H */
projects / ffmpeg / blobdiff