(*
* 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
* revision 27592, Fri Sep 12 21:46:53 2008 UTC
*)
{
* update to
* Max. version: 0.7.2, Mon Jan 4 2010 22:20:00 CET
* MiSchi
}
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
(* Max. supported version by this header *)
LIBSWSCALE_MAX_VERSION_MAJOR = 0;
LIBSWSCALE_MAX_VERSION_MINOR = 7;
LIBSWSCALE_MAX_VERSION_RELEASE = 2;
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;
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;
(**
* 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; srcSlice: PPCuint8Array; srcStride: PCintArray;
srcSliceY: cint; srcSliceH: cint; dst: PPCuint8Array; dstStride: PCintArray): cint;
cdecl; external sw__scale;
{$IF LIBSWSCALE_VERSION_MAJOR < 1}
// deprecated. Use sws_scale() instead.
function sws_scale_ordered(context: PSwsContext; 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;
implementation
end.
