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-rw-r--r--src/lib/ffmpeg7/swscale.pas465
1 files changed, 465 insertions, 0 deletions
diff --git a/src/lib/ffmpeg7/swscale.pas b/src/lib/ffmpeg7/swscale.pas
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+(*
+ * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ *
+ * FFmpeg Pascal port
+ * - Ported by the UltraStar Deluxe Team
+ *
+ * Conversion of libswscale/swscale.h
+ * version: 0.14.1
+ *)
+
+unit swscale;
+
+{$IFDEF FPC}
+ {$MODE DELPHI }
+ {$PACKENUM 4} (* use 4-byte enums *)
+ {$PACKRECORDS C} (* C/C++-compatible record packing *)
+{$ELSE}
+ {$MINENUMSIZE 4} (* use 4-byte enums *)
+{$ENDIF}
+
+{$IFDEF DARWIN}
+ {$linklib libswscale}
+{$ENDIF}
+
+interface
+
+uses
+ ctypes,
+ avutil,
+ avcodec,
+ UConfig;
+
+const
+(*
+ * IMPORTANT: The official FFmpeg C headers change very quickly. Often some
+ * of the data structures are changed so that they become incompatible with
+ * older header files. The Pascal headers have to be adjusted to those changes,
+ * otherwise the application might crash randomly or strange bugs (not
+ * necessarily related to video or audio due to buffer overflows etc.) might
+ * occur.
+ *
+ * In the past users reported problems with USDX that took hours to fix and
+ * the problem was an unsupported version of FFmpeg. So we decided to disable
+ * support for future versions of FFmpeg until the headers are revised by us
+ * for that version as they otherwise most probably will break USDX.
+ *
+ * If the headers do not yet support your FFmpeg version you may want to
+ * adjust the max. version numbers manually but please note: it may work but
+ * in many cases it does not. The USDX team does NOT PROVIDE ANY SUPPORT
+ * for the game if the MAX. VERSION WAS CHANGED.
+ *
+ * The only safe way to support new versions of FFmpeg is to add the changes
+ * of the FFmpeg git repository C headers to the Pascal headers.
+ * You can accelerate this process by posting a patch with the git changes
+ * translated to Pascal to our bug tracker (please join our IRC chat before
+ * you start working on it). Simply adjusting the max. versions is NOT a valid
+ * fix.
+ *)
+ (* Max. supported version by this header *)
+ LIBSWSCALE_MAX_VERSION_MAJOR = 0;
+ LIBSWSCALE_MAX_VERSION_MINOR = 11;
+ LIBSWSCALE_MAX_VERSION_RELEASE = 0;
+ LIBSWSCALE_MAX_VERSION = (LIBSWSCALE_MAX_VERSION_MAJOR * VERSION_MAJOR) +
+ (LIBSWSCALE_MAX_VERSION_MINOR * VERSION_MINOR) +
+ (LIBSWSCALE_MAX_VERSION_RELEASE * VERSION_RELEASE);
+
+(* Check if linked versions are supported *)
+{$IF (LIBSWSCALE_VERSION > LIBSWSCALE_MAX_VERSION)}
+// {$MESSAGE Error 'Linked version of libswscale is not yet supported!'}
+{$IFEND}
+
+type
+ TQuadCintArray = array[0..3] of cint;
+ PQuadCintArray = ^TQuadCintArray;
+ TCintArray = array[0..0] of cint;
+ PCintArray = ^TCintArray;
+ TPCuint8Array = array[0..0] of PCuint8;
+ PPCuint8Array = ^TPCuint8Array;
+
+const
+{$ifndef FF_API_SWS_GETCONTEXT}
+ FF_API_SWS_GETCONTEXT = LIBSWSCALE_VERSION_MAJOR < 3;
+{$endif}
+{$ifndef FF_API_SWS_CPU_CAPS}
+ FF_API_SWS_CPU_CAPS = LIBSWSCALE_VERSION_MAJOR < 3;
+{$endif}
+{$ifndef FF_API_SWS_GETCONTEXT}
+ FF_API_SWS_FORMAT_NAME = LIBSWSCALE_VERSION_MAJOR < 3;
+{$endif}
+
+(**
+ * Returns the LIBSWSCALE_VERSION_INT constant.
+ *)
+function swscale_version(): cuint;
+ cdecl; external sw__scale;
+
+(**
+ * Returns the libswscale build-time configuration.
+ *)
+function swscale_configuration(): PAnsiChar;
+ cdecl; external sw__scale;
+
+(**
+ * Returns the libswscale license.
+ *)
+function swscale_license(): PAnsiChar;
+ cdecl; external sw__scale;
+
+const
+ (* values for the flags, the stuff on the command line is different *)
+ SWS_FAST_BILINEAR = 1;
+ SWS_BILINEAR = 2;
+ SWS_BICUBIC = 4;
+ SWS_X = 8;
+ SWS_POINT = $10;
+ SWS_AREA = $20;
+ SWS_BICUBLIN = $40;
+ SWS_GAUSS = $80;
+ SWS_SINC = $100;
+ SWS_LANCZOS = $200;
+ SWS_SPLINE = $400;
+
+ SWS_SRC_V_CHR_DROP_MASK = $30000;
+ SWS_SRC_V_CHR_DROP_SHIFT = 16;
+
+ SWS_PARAM_DEFAULT = 123456;
+
+ SWS_PRINT_INFO = $1000;
+
+ // the following 3 flags are not completely implemented
+ // internal chrominace subsampling info
+ SWS_FULL_CHR_H_INT = $2000;
+ // input subsampling info
+ SWS_FULL_CHR_H_INP = $4000;
+ SWS_DIRECT_BGR = $8000;
+ SWS_ACCURATE_RND = $40000;
+ SWS_BITEXACT = $80000;
+
+{$if FF_API_SWS_CPU_CAPS}
+(**
+ * CPU caps are autodetected now, those flags
+ * are only provided for API compatibility.
+ *)
+ SWS_CPU_CAPS_MMX = $80000000;
+ SWS_CPU_CAPS_MMX2 = $20000000;
+ SWS_CPU_CAPS_3DNOW = $40000000;
+ SWS_CPU_CAPS_ALTIVEC = $10000000;
+ SWS_CPU_CAPS_BFIN = $01000000;
+{$endif}
+
+ SWS_MAX_REDUCE_CUTOFF = 0.002;
+
+ SWS_CS_ITU709 = 1;
+ SWS_CS_FCC = 4;
+ SWS_CS_ITU601 = 5;
+ SWS_CS_ITU624 = 5;
+ SWS_CS_SMPTE170M = 5;
+ SWS_CS_SMPTE240M = 7;
+ 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.
+ *)
+function sws_getCoefficients(colorspace: cint): Pcint;
+ cdecl; external sw__scale;
+
+type
+
+ // when used for filters they must have an odd number of elements
+ // coeffs cannot be shared between vectors
+ PSwsVector = ^TSwsVector;
+ TSwsVector = record
+ coeff: PCdouble; // pointer to the list of coefficients
+ length: cint; // number of coefficients in the vector
+ end;
+
+ // vectors can be shared
+ PSwsFilter = ^TSwsFilter;
+ TSwsFilter = record
+ lumH: PSwsVector;
+ lumV: PSwsVector;
+ chrH: PSwsVector;
+ chrV: PSwsVector;
+ end;
+
+ PSwsContext = ^TSwsContext;
+ TSwsContext = record
+ {internal structure}
+ end;
+
+(**
+ * Returns a positive value if pix_fmt is a supported input format, 0
+ * otherwise.
+ *)
+function sws_isSupportedInput(pix_fmt: TAVPixelFormat): cint;
+ cdecl; external sw__scale;
+
+(**
+ * Returns a positive value if pix_fmt is a supported output format, 0
+ * otherwise.
+ *)
+function sws_isSupportedOutput(pix_fmt: TAVPixelFormat): cint;
+ cdecl; external sw__scale;
+
+(**
+ * Allocates an empty SwsContext. This must be filled and passed to
+ * sws_init_context(). For filling see AVOptions, options.c and
+ * sws_setColorspaceDetails().
+ *)
+function sws_alloc_context(): PSwsContext;
+ cdecl; external sw__scale;
+
+(**
+ * Initializes the swscaler context sws_context.
+ *
+ * @return zero or positive value on success, a negative value on
+ * error
+ *)
+function sws_init_context(sws_context: PSwsContext; srcFilter: PSwsFilter; dstFilter: PSwsFilter): cint;
+ cdecl; external sw__scale;
+
+(**
+ * Frees the swscaler context swsContext.
+ * If swsContext is NULL, then does nothing.
+ *)
+procedure sws_freeContext(swsContext: PSwsContext);
+ cdecl; external sw__scale;
+
+{$if FF_API_SWS_GETCONTEXT}
+(**
+ * Allocates and returns a SwsContext. You need it to perform
+ * scaling/conversion operations using sws_scale().
+ *
+ * @param srcW the width of the source image
+ * @param srcH the height of the source image
+ * @param srcFormat the source image format
+ * @param dstW the width of the destination image
+ * @param dstH the height of the destination image
+ * @param dstFormat the destination image format
+ * @param flags specify which algorithm and options to use for rescaling
+ * @return a pointer to an allocated context, or NULL in case of error
+ *)
+function sws_getContext(srcW: cint; srcH: cint; srcFormat: TAVPixelFormat;
+ dstW: cint; dstH: cint; dstFormat: TAVPixelFormat;
+ flags: cint; srcFilter: PSwsFilter;
+ dstFilter: PSwsFilter; param: PCdouble): PSwsContext;
+ cdecl; external sw__scale;
+{$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
+ *)
+function sws_scale(context: PSwsContext; {const} srcSlice: PPCuint8Array; {const} srcStride: PCintArray;
+ srcSliceY: cint; srcSliceH: cint; {const} dst: PPCuint8Array; {const} dstStride: PCintArray): cint;
+ cdecl; external sw__scale;
+
+{$if LIBSWSCALE_VERSION_MAJOR < 1}
+// deprecated. Use sws_scale() instead.
+function sws_scale_ordered(context: PSwsContext; {const} src: PPCuint8Array;
+ srcStride: PCintArray; srcSliceY: cint; srcSliceH: cint;
+ dst: PPCuint8Array; dstStride: PCintArray): cint;
+ cdecl; external sw__scale; deprecated;
+{$ifend}
+
+(**
+ * @param inv_table the yuv2rgb coefficients, normally ff_yuv2rgb_coeffs[x]
+ * @param fullRange if 1 then the luma range is 0..255 if 0 it is 16..235
+ * @return -1 if not supported
+ *)
+function sws_setColorspaceDetails(c: PSwsContext; inv_table: PQuadCintArray;
+ srcRange: cint; table: PQuadCintArray; dstRange: cint;
+ brightness: cint; contrast: cint; saturation: cint): cint;
+ cdecl; external sw__scale;
+
+(**
+ * @return -1 if not supported
+ *)
+function sws_getColorspaceDetails(c: PSwsContext; var inv_table: PQuadCintArray;
+ var srcRange: cint; var table: PQuadCintArray; var dstRange: cint;
+ var brightness: cint; var contrast: cint; var saturation: cint): cint;
+ cdecl; external sw__scale;
+
+(**
+ * Allocates and returns an uninitialized vector with length coefficients.
+ *)
+function sws_allocVec(length: cint): PSwsVector;
+ cdecl; external sw__scale;
+
+(**
+ * Returns a normalized Gaussian curve used to filter stuff
+ * quality=3 is high quality, lower is lower quality.
+ *)
+function sws_getGaussianVec(variance: cdouble; quality: cdouble): PSwsVector;
+ cdecl; external sw__scale;
+
+(**
+ * Allocates and returns a vector with length coefficients, all
+ * with the same value c.
+ *)
+function sws_getConstVec(c: cdouble; length: cint): PSwsVector;
+ cdecl; external sw__scale;
+
+(**
+ * Allocates and returns a vector with just one coefficient, with
+ * value 1.0.
+ *)
+function sws_getIdentityVec: PSwsVector;
+ cdecl; external sw__scale;
+
+(**
+ * Scales all the coefficients of a by the scalar value.
+ *)
+procedure sws_scaleVec(a: PSwsVector; scalar: cdouble);
+ cdecl; external sw__scale;
+
+(**
+ * Scales all the coefficients of a so that their sum equals height.
+ *)
+procedure sws_normalizeVec(a: PSwsVector; height: cdouble);
+ cdecl; external sw__scale;
+
+procedure sws_convVec(a: PSwsVector; b: PSwsVector);
+ cdecl; external sw__scale;
+
+procedure sws_addVec(a: PSwsVector; b: PSwsVector);
+ cdecl; external sw__scale;
+
+procedure sws_subVec(a: PSwsVector; b: PSwsVector);
+ cdecl; external sw__scale;
+
+procedure sws_shiftVec(a: PSwsVector; shift: cint);
+ cdecl; external sw__scale;
+
+(**
+ * Allocates and returns a clone of the vector a, that is a vector
+ * with the same coefficients as a.
+ *)
+function sws_cloneVec(a: PSwsVector): PSwsVector;
+ cdecl; external sw__scale;
+
+{$if LIBSWSCALE_VERSION_MAJOR < 1}
+(**
+ * @deprecated Use sws_printVec2() instead.
+ *)
+procedure sws_printVec(a: PSwsVector);
+ cdecl; external sw__scale; deprecated;
+{$ifend}
+
+(**
+ * Prints with av_log() a textual representation of the vector a
+ * if log_level <= av_log_level.
+ *)
+procedure sws_printVec2(a: PSwsVector;
+ log_ctx: PAVClass; // PAVClass is declared in avcodec.pas
+ log_level: cint);
+ cdecl; external sw__scale;
+
+procedure sws_freeVec(a: PSwsVector);
+ cdecl; external sw__scale;
+
+function sws_getDefaultFilter(lumaGBlur: cfloat; chromaGBlur: cfloat;
+ lumaSharpen: cfloat; chromaSharpen: cfloat;
+ chromaHShift: cfloat; chromaVShift: cfloat;
+ verbose: cint): PSwsFilter;
+ cdecl; external sw__scale;
+
+procedure sws_freeFilter(filter: PSwsFilter);
+ cdecl; external sw__scale;
+
+(**
+ * 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.
+ *)
+function sws_getCachedContext(context: PSwsContext;
+ srcW: cint; srcH: cint; srcFormat: TAVPixelFormat;
+ dstW: cint; dstH: cint; dstFormat: TAVPixelFormat;
+ flags: cint; srcFilter: PSwsFilter;
+ dstFilter: PSwsFilter; param: PCdouble): PSwsContext;
+ cdecl; external sw__scale;
+
+(**
+ * 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
+ *)
+procedure sws_convertPalette8ToPacked32({const} src: PPCuint8Array;
+ dst: PPCuint8Array;
+ num_pixels: clong;
+ {const} palette: PPCuint8Array);
+ cdecl; external sw__scale;
+
+(**
+ * 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
+ *)
+procedure sws_convertPalette8ToPacked24({const} src: PPCuint8Array;
+ dst: PPCuint8Array;
+ num_pixels: clong;
+ {const} palette: PPCuint8Array);
+ cdecl; external sw__scale;
+
+implementation
+
+end.