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vpx/vp8/common/filter.h

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clean up bilinear filter make reference version of bilinear_filters short. use reference versions of bilinear_filters and sub_pel_filters when possible. recognize that Width was being passed into filter_block2d_bil_first_pass multiple times. ARM version had already fixed this. propegate to C. change references to src_pixels_per_line to src_pitch and standardize on src/dst (instead of input/output). recognize that first_pass is only run in the verticle and second_pass only horizontal. ARM version had already fixed this. propegate to C Change-Id: I292d376d239a9a7ca37ec2bf03cc0720606983e2
2011-02-08 19:54:22 +01:00
/*
* Copyright (c) 2011 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef FILTER_H
#define FILTER_H
Adds support for enhanced interpolation for subpel motion using an 8-tap filter. The results with 3 different 8-tap filters on the derf set are in: http://www.corp.google.com/~debargha/vp8_results/enhinterp.html The one that gives the most gain achieves an overall gain of about 0.6%. The results for a set of 12 hd (720p) videos are in: http://www.corp.google.com/~debargha/vp8_results/enhinterp_hd.html with max gain of 0.55% with the same filter. The best filter apparently achieves the best trade-off between pass band ripple and stop band attenuation. Change-Id: I919e28ae245c0493147fa0864f8c9d048a9dd530
2012-01-16 20:21:12 +01:00
#include "vpx_config.h"
#include "vpx_scale/yv12config.h"
clean up bilinear filter make reference version of bilinear_filters short. use reference versions of bilinear_filters and sub_pel_filters when possible. recognize that Width was being passed into filter_block2d_bil_first_pass multiple times. ARM version had already fixed this. propegate to C. change references to src_pixels_per_line to src_pitch and standardize on src/dst (instead of input/output). recognize that first_pass is only run in the verticle and second_pass only horizontal. ARM version had already fixed this. propegate to C Change-Id: I292d376d239a9a7ca37ec2bf03cc0720606983e2
2011-02-08 19:54:22 +01:00
#define BLOCK_HEIGHT_WIDTH 4
#define VP8_FILTER_WEIGHT 128
#define VP8_FILTER_SHIFT 7
Supporting high precision 1/8-pel motion vectors This is the initial patch for supporting 1/8th pel motion. Currently if we configure with enable-high-precision-mv, all motion vectors would default to 1/8 pel. Encode and decode syncs fine with the current code. In the next phase the code will be refactored so that we can choose the 1/8 pel mode adaptively at a frame/segment/mb level. Derf results: http://www.corp.google.com/~debargha/vp8_results/enhinterp_hpmv.html (about 0.83% better than 8-tap interpoaltion) Patch 3: Rebased. Also adding 1/16th pel interpolation for U and V Patch 4: HD results. http://www.corp.google.com/~debargha/vp8_results/enhinterp_hd_hpmv.html Seems impressive (unless I am doing something wrong). Patch 5: Added mmx/sse for bilateral filtering, as well as enforced use of c-versions of subpel filters with 8-taps and 1/16th pel; Also redesigned the 8-tap filters to reduce the cut-off in order to introduce a denoising effect. There is a new configure option sixteenth-subpel-uv which will use 1/16 th pel interpolation for uv, if the motion vectors have 1/8 pel accuracy. With the fixes the results are promising on the derf set. The enhanced interpolation option with 8-taps alone gives 3% improvement over thei derf set: http://www.corp.google.com/~debargha/vp8_results/enhinterpn.html Results on high precision mv and on the hd set are to follow. Patch 6: Adding a missing condition for CONFIG_SIXTEENTH_SUBPEL_UV in vp8/common/x86/x86_systemdependent.c Patch 7: Cleaning up various debug messages. Patch 8: Merge conflict Change-Id: I5b1d844457aefd7414a9e4e0e06c6ed38fd8cc04
2012-02-16 18:29:54 +01:00
#if CONFIG_SIXTEENTH_SUBPEL_UV
#define SUBPEL_SHIFTS 16
#else
#define SUBPEL_SHIFTS 8
#endif
extern const short vp8_bilinear_filters[SUBPEL_SHIFTS][2];
Making subpel filters switchable at frame level Various refactoring to make the subpel motion compensation filters switchable by a frame level field. Two types of 8-tap filters are supported in addition to the existing bilinar and sixtap filters. One is the default 8-tap and the other has a sharper cut-off for use with frames with substantial edge content. Patch 2: Added a preliminary strategy for filter selection based on edginess detecton. Also includes some filter changes. Change-Id: I866085bda5ae143cfdf2ec88157feaabdf7bd63a
2012-03-19 15:53:05 +01:00
extern const short vp8_sub_pel_filters_6[SUBPEL_SHIFTS][6];
extern const short vp8_sub_pel_filters_8[SUBPEL_SHIFTS][8];
extern const short vp8_sub_pel_filters_8s[SUBPEL_SHIFTS][8];
Supporting high precision 1/8-pel motion vectors This is the initial patch for supporting 1/8th pel motion. Currently if we configure with enable-high-precision-mv, all motion vectors would default to 1/8 pel. Encode and decode syncs fine with the current code. In the next phase the code will be refactored so that we can choose the 1/8 pel mode adaptively at a frame/segment/mb level. Derf results: http://www.corp.google.com/~debargha/vp8_results/enhinterp_hpmv.html (about 0.83% better than 8-tap interpoaltion) Patch 3: Rebased. Also adding 1/16th pel interpolation for U and V Patch 4: HD results. http://www.corp.google.com/~debargha/vp8_results/enhinterp_hd_hpmv.html Seems impressive (unless I am doing something wrong). Patch 5: Added mmx/sse for bilateral filtering, as well as enforced use of c-versions of subpel filters with 8-taps and 1/16th pel; Also redesigned the 8-tap filters to reduce the cut-off in order to introduce a denoising effect. There is a new configure option sixteenth-subpel-uv which will use 1/16 th pel interpolation for uv, if the motion vectors have 1/8 pel accuracy. With the fixes the results are promising on the derf set. The enhanced interpolation option with 8-taps alone gives 3% improvement over thei derf set: http://www.corp.google.com/~debargha/vp8_results/enhinterpn.html Results on high precision mv and on the hd set are to follow. Patch 6: Adding a missing condition for CONFIG_SIXTEENTH_SUBPEL_UV in vp8/common/x86/x86_systemdependent.c Patch 7: Cleaning up various debug messages. Patch 8: Merge conflict Change-Id: I5b1d844457aefd7414a9e4e0e06c6ed38fd8cc04
2012-02-16 18:29:54 +01:00
clean up bilinear filter make reference version of bilinear_filters short. use reference versions of bilinear_filters and sub_pel_filters when possible. recognize that Width was being passed into filter_block2d_bil_first_pass multiple times. ARM version had already fixed this. propegate to C. change references to src_pixels_per_line to src_pitch and standardize on src/dst (instead of input/output). recognize that first_pass is only run in the verticle and second_pass only horizontal. ARM version had already fixed this. propegate to C Change-Id: I292d376d239a9a7ca37ec2bf03cc0720606983e2
2011-02-08 19:54:22 +01:00
#endif //FILTER_H
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