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      1 /*
      2  *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #ifndef VP8_ENCODER_DENOISING_H_
     12 #define VP8_ENCODER_DENOISING_H_
     13 
     14 #include "block.h"
     15 #include "vp8/common/loopfilter.h"
     16 
     17 #ifdef __cplusplus
     18 extern "C" {
     19 #endif
     20 
     21 #define SUM_DIFF_THRESHOLD (16 * 16 * 2)
     22 #define SUM_DIFF_THRESHOLD_HIGH (600)  // ~(16 * 16 * 1.5)
     23 #define MOTION_MAGNITUDE_THRESHOLD (8*3)
     24 
     25 #define SUM_DIFF_THRESHOLD_UV (96)   // (8 * 8 * 1.5)
     26 #define SUM_DIFF_THRESHOLD_HIGH_UV (8 * 8 * 2)
     27 #define SUM_DIFF_FROM_AVG_THRESH_UV (8 * 8 * 8)
     28 #define MOTION_MAGNITUDE_THRESHOLD_UV (8*3)
     29 
     30 #define MAX_GF_ARF_DENOISE_RANGE (8)
     31 
     32 enum vp8_denoiser_decision
     33 {
     34   COPY_BLOCK,
     35   FILTER_BLOCK
     36 };
     37 
     38 enum vp8_denoiser_filter_state {
     39   kNoFilter,
     40   kFilterZeroMV,
     41   kFilterNonZeroMV
     42 };
     43 
     44 enum vp8_denoiser_mode {
     45   kDenoiserOff,
     46   kDenoiserOnYOnly,
     47   kDenoiserOnYUV,
     48   kDenoiserOnYUVAggressive,
     49   kDenoiserOnAdaptive
     50 };
     51 
     52 typedef struct {
     53   // Scale factor on sse threshold above which no denoising is done.
     54   unsigned int scale_sse_thresh;
     55   // Scale factor on motion magnitude threshold above which no
     56   // denoising is done.
     57   unsigned int scale_motion_thresh;
     58   // Scale factor on motion magnitude below which we increase the strength of
     59   // the temporal filter (in function vp8_denoiser_filter).
     60   unsigned int scale_increase_filter;
     61   // Scale factor to bias to ZEROMV for denoising.
     62   unsigned int denoise_mv_bias;
     63   // Scale factor to bias to ZEROMV for coding mode selection.
     64   unsigned int pickmode_mv_bias;
     65   // Quantizer threshold below which we use the segmentation map to switch off
     66   // loop filter for blocks that have been coded as ZEROMV-LAST a certain number
     67   // (consec_zerolast) of consecutive frames. Note that the delta-QP is set to
     68   // 0 when segmentation map is used for shutting off loop filter.
     69   unsigned int qp_thresh;
     70   // Threshold for number of consecutive frames for blocks coded as ZEROMV-LAST.
     71   unsigned int consec_zerolast;
     72   // Threshold for amount of spatial blur on Y channel. 0 means no spatial blur.
     73   unsigned int spatial_blur;
     74 } denoise_params;
     75 
     76 typedef struct vp8_denoiser
     77 {
     78     YV12_BUFFER_CONFIG yv12_running_avg[MAX_REF_FRAMES];
     79     YV12_BUFFER_CONFIG yv12_mc_running_avg;
     80     // TODO(marpan): Should remove yv12_last_source and use vp8_lookahead_peak.
     81     YV12_BUFFER_CONFIG yv12_last_source;
     82     unsigned char* denoise_state;
     83     int num_mb_cols;
     84     int denoiser_mode;
     85     int threshold_aggressive_mode;
     86     int nmse_source_diff;
     87     int nmse_source_diff_count;
     88     int qp_avg;
     89     int qp_threshold_up;
     90     int qp_threshold_down;
     91     int bitrate_threshold;
     92     denoise_params denoise_pars;
     93 } VP8_DENOISER;
     94 
     95 int vp8_denoiser_allocate(VP8_DENOISER *denoiser, int width, int height,
     96                           int num_mb_rows, int num_mb_cols, int mode);
     97 
     98 void vp8_denoiser_free(VP8_DENOISER *denoiser);
     99 
    100 void vp8_denoiser_set_parameters(VP8_DENOISER *denoiser, int mode);
    101 
    102 void vp8_denoiser_denoise_mb(VP8_DENOISER *denoiser,
    103                              MACROBLOCK *x,
    104                              unsigned int best_sse,
    105                              unsigned int zero_mv_sse,
    106                              int recon_yoffset,
    107                              int recon_uvoffset,
    108                              loop_filter_info_n *lfi_n,
    109                              int mb_row,
    110                              int mb_col,
    111                              int block_index);
    112 
    113 #ifdef __cplusplus
    114 }  // extern "C"
    115 #endif
    116 
    117 #endif  // VP8_ENCODER_DENOISING_H_
    118