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* Copyright (C) 2001-2002 Michael Niedermayer (
* This file is part of FFmpeg.
* FFmpeg 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.
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU 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
* @file
* internal API header.
#include <string.h>
#include "libavutil/avutil.h"
#include "libavutil/intmath.h"
#include "libavutil/log.h"
#include "postprocess.h"
#define V_DEBLOCK 0x01
#define H_DEBLOCK 0x02
#define DERING 0x04
#define LEVEL_FIX 0x08 ///< Brightness & Contrast
#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 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 standard 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
#define BITEXACT 0x1000000
//use if you want a faster postprocessing code
//cannot differentiate between chroma & luma filters (both on or both off)
//obviously the -pp option on the command line has no effect except turning the here selected
//filters on
//#define COMPILE_TIME_MODE 0x77
#define CLIP av_clip_uint8
* Postprocessing filter.
struct PPFilter{
const char *shortName;
const 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
* Postprocessing mode.
typedef struct PPMode{
int lumMode; ///< activates filters for luminance
int chromMode; ///< activates filters for chrominance
int error; ///< non zero on error
int minAllowedY; ///< for brightness correction
int maxAllowedY; ///< for brightness correction
float maxClippedThreshold; ///< amount of "black" you are willing to lose 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{
* info on struct for av_log
const AVClass *av_class;
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;
DECLARE_ALIGNED(8, uint64_t, packedYOffset);
DECLARE_ALIGNED(8, uint64_t, packedYScale);
/** Temporal noise reducing buffers */
uint8_t *tempBlurred[3];
int32_t *tempBlurredPast[3];
/** Temporary buffers for handling the last row(s) */
uint8_t *tempDst;
uint8_t *tempSrc;
uint8_t *deintTemp;
DECLARE_ALIGNED(8, uint64_t, pQPb);
DECLARE_ALIGNED(8, uint64_t, pQPb2);
DECLARE_ALIGNED(8, uint64_t, mmxDcOffset)[64];
DECLARE_ALIGNED(8, uint64_t, 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;
static inline void linecpy(void *dest, const void *src, int lines, int stride) {
if (stride > 0) {
memcpy(dest, src, lines*stride);
} else {
memcpy((uint8_t*)dest+(lines-1)*stride, (const uint8_t*)src+(lines-1)*stride, -lines*stride);