Home | History | Annotate | Download | only in encoder
      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 VPX_VP8_ENCODER_DENOISING_H_
     12 #define VPX_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 512
     22 #define SUM_DIFF_THRESHOLD_HIGH 600
     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 { COPY_BLOCK, FILTER_BLOCK };
     33 
     34 enum vp8_denoiser_filter_state { kNoFilter, kFilterZeroMV, kFilterNonZeroMV };
     35 
     36 enum vp8_denoiser_mode {
     37   kDenoiserOff,
     38   kDenoiserOnYOnly,
     39   kDenoiserOnYUV,
     40   kDenoiserOnYUVAggressive,
     41   kDenoiserOnAdaptive
     42 };
     43 
     44 typedef struct {
     45   // Scale factor on sse threshold above which no denoising is done.
     46   unsigned int scale_sse_thresh;
     47   // Scale factor on motion magnitude threshold above which no
     48   // denoising is done.
     49   unsigned int scale_motion_thresh;
     50   // Scale factor on motion magnitude below which we increase the strength of
     51   // the temporal filter (in function vp8_denoiser_filter).
     52   unsigned int scale_increase_filter;
     53   // Scale factor to bias to ZEROMV for denoising.
     54   unsigned int denoise_mv_bias;
     55   // Scale factor to bias to ZEROMV for coding mode selection.
     56   unsigned int pickmode_mv_bias;
     57   // Quantizer threshold below which we use the segmentation map to switch off
     58   // loop filter for blocks that have been coded as ZEROMV-LAST a certain number
     59   // (consec_zerolast) of consecutive frames. Note that the delta-QP is set to
     60   // 0 when segmentation map is used for shutting off loop filter.
     61   unsigned int qp_thresh;
     62   // Threshold for number of consecutive frames for blocks coded as ZEROMV-LAST.
     63   unsigned int consec_zerolast;
     64   // Threshold for amount of spatial blur on Y channel. 0 means no spatial blur.
     65   unsigned int spatial_blur;
     66 } denoise_params;
     67 
     68 typedef struct vp8_denoiser {
     69   YV12_BUFFER_CONFIG yv12_running_avg[MAX_REF_FRAMES];
     70   YV12_BUFFER_CONFIG yv12_mc_running_avg;
     71   // TODO(marpan): Should remove yv12_last_source and use vp8_lookahead_peak.
     72   YV12_BUFFER_CONFIG yv12_last_source;
     73   unsigned char *denoise_state;
     74   int num_mb_cols;
     75   int denoiser_mode;
     76   int threshold_aggressive_mode;
     77   int nmse_source_diff;
     78   int nmse_source_diff_count;
     79   int qp_avg;
     80   int qp_threshold_up;
     81   int qp_threshold_down;
     82   int bitrate_threshold;
     83   denoise_params denoise_pars;
     84 } VP8_DENOISER;
     85 
     86 int vp8_denoiser_allocate(VP8_DENOISER *denoiser, int width, int height,
     87                           int num_mb_rows, int num_mb_cols, int mode);
     88 
     89 void vp8_denoiser_free(VP8_DENOISER *denoiser);
     90 
     91 void vp8_denoiser_set_parameters(VP8_DENOISER *denoiser, int mode);
     92 
     93 void vp8_denoiser_denoise_mb(VP8_DENOISER *denoiser, MACROBLOCK *x,
     94                              unsigned int best_sse, unsigned int zero_mv_sse,
     95                              int recon_yoffset, int recon_uvoffset,
     96                              loop_filter_info_n *lfi_n, int mb_row, int mb_col,
     97                              int block_index, int consec_zero_last);
     98 
     99 #ifdef __cplusplus
    100 }  // extern "C"
    101 #endif
    102 
    103 #endif  // VPX_VP8_ENCODER_DENOISING_H_
    104