| /* |
| * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef SWSCALE_SWSCALE_H |
| #define SWSCALE_SWSCALE_H |
| |
| /** |
| * @file |
| * @brief |
| * external api for the swscale stuff |
| */ |
| |
| #include "libavutil/avutil.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 |
| #ifndef FF_API_SWS_FORMAT_NAME |
| #define FF_API_SWS_FORMAT_NAME (LIBSWSCALE_VERSION_MAJOR < 3) |
| #endif |
| |
| /** |
| * Returns the LIBSWSCALE_VERSION_INT constant. |
| */ |
| unsigned swscale_version(void); |
| |
| /** |
| * Returns the libswscale build-time configuration. |
| */ |
| const char *swscale_configuration(void); |
| |
| /** |
| * Returns the libswscale license. |
| */ |
| const char *swscale_license(void); |
| |
| /* values for the flags, the stuff on the command line is different */ |
| #define SWS_FAST_BILINEAR 1 |
| #define SWS_BILINEAR 2 |
| #define SWS_BICUBIC 4 |
| #define SWS_X 8 |
| #define SWS_POINT 0x10 |
| #define SWS_AREA 0x20 |
| #define SWS_BICUBLIN 0x40 |
| #define SWS_GAUSS 0x80 |
| #define SWS_SINC 0x100 |
| #define SWS_LANCZOS 0x200 |
| #define SWS_SPLINE 0x400 |
| |
| #define SWS_SRC_V_CHR_DROP_MASK 0x30000 |
| #define SWS_SRC_V_CHR_DROP_SHIFT 16 |
| |
| #define SWS_PARAM_DEFAULT 123456 |
| |
| #define SWS_PRINT_INFO 0x1000 |
| |
| //the following 3 flags are not completely implemented |
| //internal chrominace subsampling info |
| #define SWS_FULL_CHR_H_INT 0x2000 |
| //input subsampling info |
| #define SWS_FULL_CHR_H_INP 0x4000 |
| #define SWS_DIRECT_BGR 0x8000 |
| #define SWS_ACCURATE_RND 0x40000 |
| #define SWS_BITEXACT 0x80000 |
| |
| #if FF_API_SWS_CPU_CAPS |
| /** |
| * CPU caps are autodetected now, those flags |
| * are only provided for API compatibility. |
| */ |
| #define SWS_CPU_CAPS_MMX 0x80000000 |
| #define SWS_CPU_CAPS_MMX2 0x20000000 |
| #define SWS_CPU_CAPS_3DNOW 0x40000000 |
| #define SWS_CPU_CAPS_ALTIVEC 0x10000000 |
| #define SWS_CPU_CAPS_BFIN 0x01000000 |
| #define SWS_CPU_CAPS_SSE2 0x02000000 |
| #endif |
| |
| #define SWS_MAX_REDUCE_CUTOFF 0.002 |
| |
| #define SWS_CS_ITU709 1 |
| #define SWS_CS_FCC 4 |
| #define SWS_CS_ITU601 5 |
| #define SWS_CS_ITU624 5 |
| #define SWS_CS_SMPTE170M 5 |
| #define SWS_CS_SMPTE240M 7 |
| #define SWS_CS_DEFAULT 5 |
| |
| /** |
| * Returns a pointer to yuv<->rgb coefficients for the given colorspace |
| * suitable for sws_setColorspaceDetails(). |
| * |
| * @param colorspace One of the SWS_CS_* macros. If invalid, |
| * SWS_CS_DEFAULT is used. |
| */ |
| 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 { |
| double *coeff; ///< pointer to the list of coefficients |
| int length; ///< number of coefficients in the vector |
| } SwsVector; |
| |
| // vectors can be shared |
| typedef struct { |
| SwsVector *lumH; |
| SwsVector *lumV; |
| SwsVector *chrH; |
| SwsVector *chrV; |
| } SwsFilter; |
| |
| struct SwsContext; |
| |
| /** |
| * Returns 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 |
| * otherwise. |
| */ |
| int sws_isSupportedOutput(enum PixelFormat pix_fmt); |
| |
| /** |
| * Allocates 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. |
| * |
| * @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. |
| * 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 |
| * scaling/conversion operations using sws_scale(). |
| * |
| * @param srcW the width of the source image |
| * @param srcH the height of the source image |
| * @param srcFormat the source image format |
| * @param dstW the width of the destination image |
| * @param dstH the height of the destination image |
| * @param dstFormat the destination image format |
| * @param flags specify which algorithm and options to use for rescaling |
| * @return a pointer to an allocated context, or NULL in case of error |
| * @note this function is to be removed after a saner alternative is |
| * written |
| * @deprecated Use sws_getCachedContext() instead. |
| */ |
| struct SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, |
| int dstW, int dstH, enum PixelFormat dstFormat, |
| int flags, SwsFilter *srcFilter, |
| SwsFilter *dstFilter, const double *param); |
| #endif |
| |
| /** |
| * Scales the image slice in srcSlice and puts the resulting scaled |
| * slice in the image in dst. A slice is a sequence of consecutive |
| * rows in an image. |
| * |
| * Slices have to be provided in sequential order, either in |
| * 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 |
| * sws_getContext() |
| * @param srcSlice the array containing the pointers to the planes of |
| * the source slice |
| * @param srcStride the array containing the strides for each plane of |
| * the source image |
| * @param srcSliceY the position in the source image of the slice to |
| * process, that is the number (counted starting from |
| * zero) in the image of the first row of the slice |
| * @param srcSliceH the height of the source slice, that is the number |
| * of rows in the slice |
| * @param dst the array containing the pointers to the planes of |
| * the destination image |
| * @param dstStride the array containing the strides for each plane of |
| * 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[]); |
| |
| #if LIBSWSCALE_VERSION_MAJOR < 1 |
| /** |
| * @deprecated Use sws_scale() instead. |
| */ |
| int sws_scale_ordered(struct SwsContext *context, const uint8_t* const src[], |
| int srcStride[], int srcSliceY, int srcSliceH, |
| uint8_t* dst[], int dstStride[]) attribute_deprecated; |
| #endif |
| |
| /** |
| * @param inv_table the yuv2rgb coefficients, normally ff_yuv2rgb_coeffs[x] |
| * @return -1 if not supported |
| */ |
| int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4], |
| int srcRange, const int table[4], int dstRange, |
| int brightness, int contrast, int saturation); |
| |
| /** |
| * @return -1 if not supported |
| */ |
| int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, |
| int *srcRange, int **table, int *dstRange, |
| 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. |
| */ |
| SwsVector *sws_getGaussianVec(double variance, double quality); |
| |
| /** |
| * Allocates and returns 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 |
| * value 1.0. |
| */ |
| SwsVector *sws_getIdentityVec(void); |
| |
| /** |
| * Scales 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. |
| */ |
| void sws_normalizeVec(SwsVector *a, double height); |
| void sws_convVec(SwsVector *a, SwsVector *b); |
| void sws_addVec(SwsVector *a, SwsVector *b); |
| void sws_subVec(SwsVector *a, SwsVector *b); |
| void sws_shiftVec(SwsVector *a, int shift); |
| |
| /** |
| * Allocates and returns a clone of the vector a, that is a vector |
| * with the same coefficients as a. |
| */ |
| SwsVector *sws_cloneVec(SwsVector *a); |
| |
| #if LIBSWSCALE_VERSION_MAJOR < 1 |
| /** |
| * @deprecated Use sws_printVec2() instead. |
| */ |
| attribute_deprecated void sws_printVec(SwsVector *a); |
| #endif |
| |
| /** |
| * Prints 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_freeVec(SwsVector *a); |
| |
| SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur, |
| float lumaSharpen, float chromaSharpen, |
| float chromaHShift, float chromaVShift, |
| int verbose); |
| void sws_freeFilter(SwsFilter *filter); |
| |
| /** |
| * Checks if context can be reused, otherwise reallocates 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 |
| * the new parameters. |
| * |
| * Be warned that srcFilter and dstFilter are not checked, they |
| * 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 flags, SwsFilter *srcFilter, |
| SwsFilter *dstFilter, const double *param); |
| |
| /** |
| * Converts 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. |
| * |
| * @param src source frame buffer |
| * @param dst destination frame buffer |
| * @param num_pixels number of pixels to convert |
| * @param palette array with [256] entries, which must match color arrangement (RGB or BGR) of src |
| */ |
| 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. |
| * |
| * With the palette format "ABCD", the destination frame ends up with the format "ABC". |
| * |
| * @param src source frame buffer |
| * @param dst destination frame buffer |
| * @param num_pixels number of pixels to convert |
| * @param palette array with [256] entries, which must match color arrangement (RGB or BGR) of src |
| */ |
| void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette); |
| |
| |
| #endif /* SWSCALE_SWSCALE_H */ |