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Diffstat (limited to 'src/lib/ffmpeg/swscale.pas')
| -rw-r--r-- | src/lib/ffmpeg/swscale.pas | 434 |
1 files changed, 434 insertions, 0 deletions
diff --git a/src/lib/ffmpeg/swscale.pas b/src/lib/ffmpeg/swscale.pas new file mode 100644 index 00000000..7289e902 --- /dev/null +++ b/src/lib/ffmpeg/swscale.pas @@ -0,0 +1,434 @@ +(* + * 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 + * Max. version: 0.11.0, revision 31301, Mon Jul 12 8:00:00 2010 CET + *) + +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!'} +{$IFEND} + +type + TQuadCintArray = array[0..3] of cint; + PQuadCintArray = ^TQuadCintArray; + TCintArray = array[0..0] of cint; + PCintArray = ^TCintArray; + TPCuint8Array = array[0..0] of PCuint8; + PPCuint8Array = ^TPCuint8Array; + +{$IF LIBSWSCALE_VERSION >= 000006001} // 0.6.1 +(** + * Returns the LIBSWSCALE_VERSION_INT constant. + *) +function swscale_version(): cuint; + cdecl; external sw__scale; +{$IFEND} + +{$IF LIBSWSCALE_VERSION >= 000007002} // 0.7.2 +(** + * 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; +{$IFEND} + +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; + + SWS_CPU_CAPS_MMX = $80000000; + SWS_CPU_CAPS_MMX2 = $20000000; + SWS_CPU_CAPS_3DNOW = $40000000; + SWS_CPU_CAPS_ALTIVEC = $10000000; + SWS_CPU_CAPS_BFIN = $01000000; + + SWS_MAX_REDUCE_CUTOFF = 0.002; + + SWS_CS_ITU709 = 1; + SWS_CS_FCC = 4; + SWS_CS_ITU601 = 5; + SWS_CS_ITU624 = 5; + SWS_CS_SMPTE170M = 5; + SWS_CS_SMPTE240M = 7; + SWS_CS_DEFAULT = 5; + +{$IF LIBSWSCALE_VERSION >= 000010000} // 0.10.0 +(** + * 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; +{$IFEND} + +type + + // when used for filters they must have an odd number of elements + // coeffs cannot be shared between vectors + PSwsVector = ^TSwsVector; + TSwsVector = record + coeff: PCdouble; // pointer to the list of coefficients + length: cint; // number of coefficients in the vector + end; + + // vectors can be shared + PSwsFilter = ^TSwsFilter; + TSwsFilter = record + lumH: PSwsVector; + lumV: PSwsVector; + chrH: PSwsVector; + chrV: PSwsVector; + end; + + PSwsContext = ^TSwsContext; + TSwsContext = record + {internal structure} + end; + +{$IF LIBSWSCALE_VERSION >= 000008000} // 0.8.0 +(** + * 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; +{$IFEND} + +(** + * Frees the swscaler context swsContext. + * If swsContext is NULL, then does nothing. + *) +procedure sws_freeContext(swsContext: PSwsContext); + cdecl; external sw__scale; + +(** + * 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; + +(** + * 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; + +(** + * 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; +{$IFEND} + +{$IF LIBSWSCALE_VERSION >= 000007000} // >= 0.7.0 +(** + * 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; +{$IFEND} + +procedure sws_freeVec(a: PSwsVector); + cdecl; external sw__scale; + +function sws_getDefaultFilter(lumaGBlur: cfloat; chromaGBlur: cfloat; + lumaSharpen: cfloat; chromaSharpen: cfloat; + chromaHShift: cfloat; chromaVShift: cfloat; + verbose: cint): PSwsFilter; + cdecl; external sw__scale; + +procedure sws_freeFilter(filter: PSwsFilter); + cdecl; external sw__scale; + +(** + * Checks if context can be reused, otherwise reallocates a new + * one. + * + * If context is NULL, just calls sws_getContext() to get a new + * context. Otherwise, checks if the parameters are the ones already + * saved in context. If that is the case, returns the current + * context. Otherwise, frees context and gets a new context with + * the new parameters. + * + * Be warned that srcFilter and dstFilter are not checked, they + * are assumed to remain the same. + *) +function sws_getCachedContext(context: PSwsContext; + srcW: cint; srcH: cint; srcFormat: TAVPixelFormat; + dstW: cint; dstH: cint; dstFormat: TAVPixelFormat; + flags: cint; srcFilter: PSwsFilter; + dstFilter: PSwsFilter; param: PCdouble): PSwsContext; + cdecl; external sw__scale; + +{$IF LIBSWSCALE_VERSION >= 000011000} // >= 0.11.0 +(** + * 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; +{$IFEND} + +implementation + +end. |