FFmpeg/libavcodec/libpostproc/postprocess_internal.h

/*
    Copyright (C) 2001-2002 Michael Niedermayer (michaelni@gmx.at)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

/**
 * @file postprocess_internal.h
 * internal api header.
 */

#define V_DEBLOCK	0x01
#define H_DEBLOCK	0x02
#define DERING		0x04
#define LEVEL_FIX	0x08 ///< Brightness & Contrast

#define LUM_V_DEBLOCK	V_DEBLOCK		//   1
#define LUM_H_DEBLOCK	H_DEBLOCK		//   2
#define CHROM_V_DEBLOCK	(V_DEBLOCK<<4)		//  16
#define CHROM_H_DEBLOCK	(H_DEBLOCK<<4)		//  32
#define LUM_DERING	DERING			//   4
#define CHROM_DERING	(DERING<<4)		//  64
#define LUM_LEVEL_FIX	LEVEL_FIX		//   8
#define CHROM_LEVEL_FIX	(LEVEL_FIX<<4)		// 128 (not implemented yet)

// Experimental vertical filters
#define V_X1_FILTER	0x0200			// 512
#define V_A_DEBLOCK	0x0400

// Experimental horizontal filters
#define H_X1_FILTER	0x2000			// 8192
#define H_A_DEBLOCK	0x4000

/// select between full y range (255-0) or standart one (234-16)
#define FULL_Y_RANGE	0x8000			// 32768

//Deinterlacing Filters
#define	LINEAR_IPOL_DEINT_FILTER	0x10000	// 65536
#define	LINEAR_BLEND_DEINT_FILTER	0x20000	// 131072
#define	CUBIC_BLEND_DEINT_FILTER	0x8000	// (not implemented yet)
#define	CUBIC_IPOL_DEINT_FILTER		0x40000	// 262144
#define	MEDIAN_DEINT_FILTER		0x80000	// 524288
#define	FFMPEG_DEINT_FILTER		0x400000
#define	LOWPASS5_DEINT_FILTER		0x800000

#define TEMP_NOISE_FILTER		0x100000
#define FORCE_QUANT			0x200000

//use if u want a faster postprocessing code
//cant differentiate between chroma & luma filters (both on or both off)
//obviosly the -pp option at the commandline has no effect except turning the here selected
//filters on
//#define COMPILE_TIME_MODE 0x77

#if 1
static inline int CLIP(int a){
	if(a&256) return ((a)>>31)^(-1);
	else      return a;
}
//#define CLIP(a) (((a)&256) ? ((a)>>31)^(-1) : (a))
#elif 0
#define CLIP(a) clip_tab[a]
#else
#define CLIP(a) (a)
#endif
/**
 * Postprocessng filter.
 */
struct PPFilter{
	char *shortName;
	char *longName;
	int chromDefault; 	///< is chrominance filtering on by default if this filter is manually activated
	int minLumQuality; 	///< minimum quality to turn luminance filtering on
	int minChromQuality;	///< minimum quality to turn chrominance filtering on
	int mask; 		///< Bitmask to turn this filter on
};

/**
 * Postprocessng mode.
 */
typedef struct PPMode{
	int lumMode; 			///< acivates filters for luminance
	int chromMode; 			///< acivates filters for chrominance
	int error; 			///< non zero on error

	int minAllowedY; 		///< for brigtness correction
	int maxAllowedY; 		///< for brihtness correction
	float maxClippedThreshold;	///< amount of "black" u r willing to loose to get a brightness corrected picture

	int maxTmpNoise[3]; 		///< for Temporal Noise Reducing filter (Maximal sum of abs differences)

	int baseDcDiff;
	int flatnessThreshold;

	int forcedQuant; 		///< quantizer if FORCE_QUANT is used
} PPMode;

/**
 * postprocess context.
 */
typedef struct PPContext{
	uint8_t *tempBlocks; ///<used for the horizontal code

	/**
	 * luma histogram.         
	 * we need 64bit here otherwise we'll going to have a problem
	 * after watching a black picture for 5 hours
	 */
	uint64_t *yHistogram;

	uint64_t __attribute__((aligned(8))) packedYOffset;
	uint64_t __attribute__((aligned(8))) packedYScale;

	/** Temporal noise reducing buffers */
	uint8_t *tempBlured[3];
	int32_t *tempBluredPast[3];

	/** Temporary buffers for handling the last row(s) */
	uint8_t *tempDst;
	uint8_t *tempSrc;

	uint8_t *deintTemp;

	uint64_t __attribute__((aligned(8))) pQPb;
	uint64_t __attribute__((aligned(8))) pQPb2;

	uint64_t __attribute__((aligned(8))) mmxDcOffset[64];
	uint64_t __attribute__((aligned(8))) mmxDcThreshold[64];

	QP_STORE_T *stdQPTable;       ///< used to fix MPEG2 style qscale
	QP_STORE_T *nonBQPTable;
	QP_STORE_T *forcedQPTable;

	int QP;
	int nonBQP;

	int frameNum;
	
	int cpuCaps;
        
	int qpStride; ///<size of qp buffers (needed to realloc them if needed)
	int stride;   ///<size of some buffers (needed to realloc them if needed)
        
	int hChromaSubSample;
	int vChromaSubSample;

	PPMode ppMode;
} PPContext;