swscale.h - vendor/google/swscale - Git at Google

 /*
  * 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_H
 #define SWSCALE_H

 /**
  * @file swscale.h
  * @brief
  *     external api for the swscale stuff
  */

 #ifdef __cplusplus
 extern "C" {
 #endif

 #define AV_STRINGIFY(s)         AV_TOSTRING(s)
 #define AV_TOSTRING(s) #s

 #define LIBSWSCALE_VERSION_INT  ((0<<16)+(5<<8)+0)
 #define LIBSWSCALE_VERSION      0.5.0
 #define LIBSWSCALE_BUILD        LIBSWSCALE_VERSION_INT

 #define LIBSWSCALE_IDENT        "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)

 /* 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 completly implemented
 //internal chrominace subsamling 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_CPU_CAPS_MMX   0x80000000
 #define SWS_CPU_CAPS_MMX2  0x20000000
 #define SWS_CPU_CAPS_3DNOW 0x40000000
 #define SWS_CPU_CAPS_ALTIVEC 0x10000000

 #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


 // when used for filters they must have an odd number of elements
 // coeffs cannot be shared between vectors
 typedef struct {
 	double *coeff;
 	int length;
 } SwsVector;

 // vectors can be shared
 typedef struct {
 	SwsVector *lumH;
 	SwsVector *lumV;
 	SwsVector *chrH;
 	SwsVector *chrV;
 } SwsFilter;

 struct SwsContext;

 void sws_freeContext(struct SwsContext *swsContext);

 struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
 			 double *param);
 int sws_scale(struct SwsContext *context, uint8_t* src, int srcStride, int srcSliceY,
                            int srcSliceH, uint8_t* dst, int dstStride);


 SwsVector *sws_getGaussianVec(double variance, double quality);
 SwsVector *sws_getConstVec(double c, int length);
 SwsVector *sws_getIdentityVec(void);
 void sws_scaleVec(SwsVector *a, double scalar);
 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);
 SwsVector *sws_cloneVec(SwsVector *a);

 void sws_printVec(SwsVector *a);
 void sws_freeVec(SwsVector *a);

 void sws_freeFilter(SwsFilter *filter);

 /**
  * Pixel format. Notes:
  *
  * PIX_FMT_RGB32 is handled in an endian-specific manner. A RGBA
  * color is put together as:
  *  (A << 24) | (R << 16) | (G << 8) | B
  * This is stored as BGRA on little endian CPU architectures and ARGB on
  * big endian CPUs.
  *
  * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
  * image data is stored in AVFrame.data[0]. The palette is transported in
  * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
  * formatted the same as in PIX_FMT_RGB32 described above (i.e., it is
  * also endian-specific). Note also that the individual RGB palette
  * components stored in AVFrame.data[1] should be in the range 0..255.
  * This is important as many custom PAL8 video codecs that were designed
  * to run on the IBM VGA graphics adapter use 6-bit palette components.
  */
 enum PixelFormat {
     PIX_FMT_NONE= -1,
     PIX_FMT_YUV420P,   ///< Planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
     PIX_FMT_YUYV422,   ///< Packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
     PIX_FMT_RGB24,     ///< Packed RGB 8:8:8, 24bpp, RGBRGB...
     PIX_FMT_BGR24,     ///< Packed RGB 8:8:8, 24bpp, BGRBGR...
     PIX_FMT_YUV422P,   ///< Planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
     PIX_FMT_YUV444P,   ///< Planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
     PIX_FMT_RGB32,     ///< Packed RGB 8:8:8, 32bpp, (msb)8A 8R 8G 8B(lsb), in cpu endianness
     PIX_FMT_YUV410P,   ///< Planar YUV 4:1:0,  9bpp, (1 Cr & Cb sample per 4x4 Y samples)
     PIX_FMT_YUV411P,   ///< Planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
     PIX_FMT_RGB565,    ///< Packed RGB 5:6:5, 16bpp, (msb)   5R 6G 5B(lsb), in cpu endianness
     PIX_FMT_RGB555,    ///< Packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), in cpu endianness most significant bit to 1
     PIX_FMT_GRAY8,     ///<        Y        ,  8bpp
     PIX_FMT_MONOWHITE, ///<        Y        ,  1bpp, 1 is white
     PIX_FMT_MONOBLACK, ///<        Y        ,  1bpp, 0 is black
     PIX_FMT_PAL8,      ///< 8 bit with PIX_FMT_RGB32 palette
     PIX_FMT_YUVJ420P,  ///< Planar YUV 4:2:0, 12bpp, full scale (jpeg)
     PIX_FMT_YUVJ422P,  ///< Planar YUV 4:2:2, 16bpp, full scale (jpeg)
     PIX_FMT_YUVJ444P,  ///< Planar YUV 4:4:4, 24bpp, full scale (jpeg)
     PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
     PIX_FMT_XVMC_MPEG2_IDCT,
     PIX_FMT_UYVY422,   ///< Packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
     PIX_FMT_UYYVYY411, ///< Packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
     PIX_FMT_BGR32,     ///< Packed RGB 8:8:8, 32bpp, (msb)8A 8B 8G 8R(lsb), in cpu endianness
     PIX_FMT_BGR565,    ///< Packed RGB 5:6:5, 16bpp, (msb)   5B 6G 5R(lsb), in cpu endianness
     PIX_FMT_BGR555,    ///< Packed RGB 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), in cpu endianness most significant bit to 1
     PIX_FMT_BGR8,      ///< Packed RGB 3:3:2,  8bpp, (msb)2B 3G 3R(lsb)
     PIX_FMT_BGR4,      ///< Packed RGB 1:2:1,  4bpp, (msb)1B 2G 1R(lsb)
     PIX_FMT_BGR4_BYTE, ///< Packed RGB 1:2:1,  8bpp, (msb)1B 2G 1R(lsb)
     PIX_FMT_RGB8,      ///< Packed RGB 3:3:2,  8bpp, (msb)2R 3G 3B(lsb)
     PIX_FMT_RGB4,      ///< Packed RGB 1:2:1,  4bpp, (msb)2R 3G 3B(lsb)
     PIX_FMT_RGB4_BYTE, ///< Packed RGB 1:2:1,  8bpp, (msb)2R 3G 3B(lsb)
     PIX_FMT_NV12,      ///< Planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 for UV
     PIX_FMT_NV21,      ///< as above, but U and V bytes are swapped

     PIX_FMT_RGB32_1,   ///< Packed RGB 8:8:8, 32bpp, (msb)8R 8G 8B 8A(lsb), in cpu endianness
     PIX_FMT_BGR32_1,   ///< Packed RGB 8:8:8, 32bpp, (msb)8B 8G 8R 8A(lsb), in cpu endianness

     PIX_FMT_NB,        ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
 };

 #ifdef __cplusplus
 }
 #endif

 #endif
	/*
	* 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_H
	#define SWSCALE_H

	/**
	* @file swscale.h
	* @brief
	* external api for the swscale stuff
	*/

	#ifdef __cplusplus
	extern "C" {
	#endif

	#define AV_STRINGIFY(s) AV_TOSTRING(s)
	#define AV_TOSTRING(s) #s

	#define LIBSWSCALE_VERSION_INT ((0<<16)+(5<<8)+0)
	#define LIBSWSCALE_VERSION 0.5.0
	#define LIBSWSCALE_BUILD LIBSWSCALE_VERSION_INT

	#define LIBSWSCALE_IDENT "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)

	/* 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 completly implemented
	//internal chrominace subsamling 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_CPU_CAPS_MMX 0x80000000
	#define SWS_CPU_CAPS_MMX2 0x20000000
	#define SWS_CPU_CAPS_3DNOW 0x40000000
	#define SWS_CPU_CAPS_ALTIVEC 0x10000000

	#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



	// when used for filters they must have an odd number of elements
	// coeffs cannot be shared between vectors
	typedef struct {
	double *coeff;
	int length;
	} SwsVector;

	// vectors can be shared
	typedef struct {
	SwsVector *lumH;
	SwsVector *lumV;
	SwsVector *chrH;
	SwsVector *chrV;
	} SwsFilter;

	struct SwsContext;

	void sws_freeContext(struct SwsContext *swsContext);

	struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
	double *param);
	int sws_scale(struct SwsContext context, uint8_t src, int srcStride, int srcSliceY,
	int srcSliceH, uint8_t* dst, int dstStride);


	SwsVector *sws_getGaussianVec(double variance, double quality);
	SwsVector *sws_getConstVec(double c, int length);
	SwsVector *sws_getIdentityVec(void);
	void sws_scaleVec(SwsVector *a, double scalar);
	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);
	SwsVector sws_cloneVec(SwsVector a);

	void sws_printVec(SwsVector *a);
	void sws_freeVec(SwsVector *a);

	void sws_freeFilter(SwsFilter *filter);

	/**
	* Pixel format. Notes:
	*
	* PIX_FMT_RGB32 is handled in an endian-specific manner. A RGBA
	* color is put together as:
	* (A << 24) \| (R << 16) \| (G << 8) \| B
	* This is stored as BGRA on little endian CPU architectures and ARGB on
	* big endian CPUs.
	*
	* When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
	* image data is stored in AVFrame.data[0]. The palette is transported in
	* AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
	* formatted the same as in PIX_FMT_RGB32 described above (i.e., it is
	* also endian-specific). Note also that the individual RGB palette
	* components stored in AVFrame.data[1] should be in the range 0..255.
	* This is important as many custom PAL8 video codecs that were designed
	* to run on the IBM VGA graphics adapter use 6-bit palette components.
	*/
	enum PixelFormat {
	PIX_FMT_NONE= -1,
	PIX_FMT_YUV420P, ///< Planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
	PIX_FMT_YUYV422, ///< Packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
	PIX_FMT_RGB24, ///< Packed RGB 8:8:8, 24bpp, RGBRGB...
	PIX_FMT_BGR24, ///< Packed RGB 8:8:8, 24bpp, BGRBGR...
	PIX_FMT_YUV422P, ///< Planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
	PIX_FMT_YUV444P, ///< Planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
	PIX_FMT_RGB32, ///< Packed RGB 8:8:8, 32bpp, (msb)8A 8R 8G 8B(lsb), in cpu endianness
	PIX_FMT_YUV410P, ///< Planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
	PIX_FMT_YUV411P, ///< Planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
	PIX_FMT_RGB565, ///< Packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), in cpu endianness
	PIX_FMT_RGB555, ///< Packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), in cpu endianness most significant bit to 1
	PIX_FMT_GRAY8, ///< Y , 8bpp
	PIX_FMT_MONOWHITE, ///< Y , 1bpp, 1 is white
	PIX_FMT_MONOBLACK, ///< Y , 1bpp, 0 is black
	PIX_FMT_PAL8, ///< 8 bit with PIX_FMT_RGB32 palette
	PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0, 12bpp, full scale (jpeg)
	PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2, 16bpp, full scale (jpeg)
	PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4, 24bpp, full scale (jpeg)
	PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
	PIX_FMT_XVMC_MPEG2_IDCT,
	PIX_FMT_UYVY422, ///< Packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
	PIX_FMT_UYYVYY411, ///< Packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
	PIX_FMT_BGR32, ///< Packed RGB 8:8:8, 32bpp, (msb)8A 8B 8G 8R(lsb), in cpu endianness
	PIX_FMT_BGR565, ///< Packed RGB 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), in cpu endianness
	PIX_FMT_BGR555, ///< Packed RGB 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), in cpu endianness most significant bit to 1
	PIX_FMT_BGR8, ///< Packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
	PIX_FMT_BGR4, ///< Packed RGB 1:2:1, 4bpp, (msb)1B 2G 1R(lsb)
	PIX_FMT_BGR4_BYTE, ///< Packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
	PIX_FMT_RGB8, ///< Packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
	PIX_FMT_RGB4, ///< Packed RGB 1:2:1, 4bpp, (msb)2R 3G 3B(lsb)
	PIX_FMT_RGB4_BYTE, ///< Packed RGB 1:2:1, 8bpp, (msb)2R 3G 3B(lsb)
	PIX_FMT_NV12, ///< Planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 for UV
	PIX_FMT_NV21, ///< as above, but U and V bytes are swapped

	PIX_FMT_RGB32_1, ///< Packed RGB 8:8:8, 32bpp, (msb)8R 8G 8B 8A(lsb), in cpu endianness
	PIX_FMT_BGR32_1, ///< Packed RGB 8:8:8, 32bpp, (msb)8B 8G 8R 8A(lsb), in cpu endianness

	PIX_FMT_NB, ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
	};

	#ifdef __cplusplus
	}
	#endif

	#endif