GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/vf_deshake.c Lines: 0 223 0.0 %
Date: 2020-08-14 10:39:37 Branches: 0 154 0.0 %

Line Branch Exec Source
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/*
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 * Copyright (C) 2010 Georg Martius <georg.martius@web.de>
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 * Copyright (C) 2010 Daniel G. Taylor <dan@programmer-art.org>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/**
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 * @file
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 * fast deshake / depan video filter
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 *
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 * SAD block-matching motion compensation to fix small changes in
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 * horizontal and/or vertical shift. This filter helps remove camera shake
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 * from hand-holding a camera, bumping a tripod, moving on a vehicle, etc.
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 *
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 * Algorithm:
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 *   - For each frame with one previous reference frame
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 *       - For each block in the frame
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 *           - If contrast > threshold then find likely motion vector
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 *       - For all found motion vectors
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 *           - Find most common, store as global motion vector
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 *       - Find most likely rotation angle
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 *       - Transform image along global motion
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 *
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 * TODO:
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 *   - Fill frame edges based on previous/next reference frames
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 *   - Fill frame edges by stretching image near the edges?
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 *       - Can this be done quickly and look decent?
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 *
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 * Dark Shikari links to http://wiki.videolan.org/SoC_x264_2010#GPU_Motion_Estimation_2
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 * for an algorithm similar to what could be used here to get the gmv
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 * It requires only a couple diamond searches + fast downscaling
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 *
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 * Special thanks to Jason Kotenko for his help with the algorithm and my
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 * inability to see simple errors in C code.
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 */
51
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#include "avfilter.h"
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#include "formats.h"
54
#include "internal.h"
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#include "video.h"
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#include "libavutil/common.h"
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#include "libavutil/mem.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/qsort.h"
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#include "deshake.h"
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#define OFFSET(x) offsetof(DeshakeContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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static const AVOption deshake_options[] = {
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    { "x", "set x for the rectangular search area",      OFFSET(cx), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
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    { "y", "set y for the rectangular search area",      OFFSET(cy), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
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    { "w", "set width for the rectangular search area",  OFFSET(cw), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
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    { "h", "set height for the rectangular search area", OFFSET(ch), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
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    { "rx", "set x for the rectangular search area",     OFFSET(rx), AV_OPT_TYPE_INT, {.i64=16}, 0, MAX_R, .flags = FLAGS },
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    { "ry", "set y for the rectangular search area",     OFFSET(ry), AV_OPT_TYPE_INT, {.i64=16}, 0, MAX_R, .flags = FLAGS },
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    { "edge", "set edge mode", OFFSET(edge), AV_OPT_TYPE_INT, {.i64=FILL_MIRROR}, FILL_BLANK, FILL_COUNT-1, FLAGS, "edge"},
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        { "blank",    "fill zeroes at blank locations",         0, AV_OPT_TYPE_CONST, {.i64=FILL_BLANK},    INT_MIN, INT_MAX, FLAGS, "edge" },
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        { "original", "original image at blank locations",      0, AV_OPT_TYPE_CONST, {.i64=FILL_ORIGINAL}, INT_MIN, INT_MAX, FLAGS, "edge" },
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        { "clamp",    "extruded edge value at blank locations", 0, AV_OPT_TYPE_CONST, {.i64=FILL_CLAMP},    INT_MIN, INT_MAX, FLAGS, "edge" },
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        { "mirror",   "mirrored edge at blank locations",       0, AV_OPT_TYPE_CONST, {.i64=FILL_MIRROR},   INT_MIN, INT_MAX, FLAGS, "edge" },
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    { "blocksize", "set motion search blocksize",       OFFSET(blocksize), AV_OPT_TYPE_INT, {.i64=8},   4, 128, .flags = FLAGS },
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    { "contrast",  "set contrast threshold for blocks", OFFSET(contrast),  AV_OPT_TYPE_INT, {.i64=125}, 1, 255, .flags = FLAGS },
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    { "search",  "set search strategy", OFFSET(search), AV_OPT_TYPE_INT, {.i64=EXHAUSTIVE}, EXHAUSTIVE, SEARCH_COUNT-1, FLAGS, "smode" },
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        { "exhaustive", "exhaustive search",      0, AV_OPT_TYPE_CONST, {.i64=EXHAUSTIVE},       INT_MIN, INT_MAX, FLAGS, "smode" },
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        { "less",       "less exhaustive search", 0, AV_OPT_TYPE_CONST, {.i64=SMART_EXHAUSTIVE}, INT_MIN, INT_MAX, FLAGS, "smode" },
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    { "filename", "set motion search detailed log file name", OFFSET(filename), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
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    { "opencl", "ignored",                              OFFSET(opencl), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
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    { NULL }
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};
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AVFILTER_DEFINE_CLASS(deshake);
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static int cmp(const void *a, const void *b)
92
{
93
    return FFDIFFSIGN(*(const double *)a, *(const double *)b);
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}
95
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/**
97
 * Cleaned mean (cuts off 20% of values to remove outliers and then averages)
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 */
99
static double clean_mean(double *values, int count)
100
{
101
    double mean = 0;
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    int cut = count / 5;
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    int x;
104
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    AV_QSORT(values, count, double, cmp);
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    for (x = cut; x < count - cut; x++) {
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        mean += values[x];
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    }
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    return mean / (count - cut * 2);
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}
113
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/**
115
 * Find the most likely shift in motion between two frames for a given
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 * macroblock. Test each block against several shifts given by the rx
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 * and ry attributes. Searches using a simple matrix of those shifts and
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 * chooses the most likely shift by the smallest difference in blocks.
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 */
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static void find_block_motion(DeshakeContext *deshake, uint8_t *src1,
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                              uint8_t *src2, int cx, int cy, int stride,
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                              IntMotionVector *mv)
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{
124
    int x, y;
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    int diff;
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    int smallest = INT_MAX;
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    int tmp, tmp2;
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    #define CMP(i, j) deshake->sad(src1 + cy  * stride + cx,  stride,\
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                                   src2 + (j) * stride + (i), stride)
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    if (deshake->search == EXHAUSTIVE) {
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        // Compare every possible position - this is sloooow!
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        for (y = -deshake->ry; y <= deshake->ry; y++) {
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            for (x = -deshake->rx; x <= deshake->rx; x++) {
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                diff = CMP(cx - x, cy - y);
137
                if (diff < smallest) {
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                    smallest = diff;
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                    mv->x = x;
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                    mv->y = y;
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                }
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            }
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        }
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    } else if (deshake->search == SMART_EXHAUSTIVE) {
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        // Compare every other possible position and find the best match
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        for (y = -deshake->ry + 1; y < deshake->ry; y += 2) {
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            for (x = -deshake->rx + 1; x < deshake->rx; x += 2) {
148
                diff = CMP(cx - x, cy - y);
149
                if (diff < smallest) {
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                    smallest = diff;
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                    mv->x = x;
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                    mv->y = y;
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                }
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            }
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        }
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        // Hone in on the specific best match around the match we found above
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        tmp = mv->x;
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        tmp2 = mv->y;
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        for (y = tmp2 - 1; y <= tmp2 + 1; y++) {
162
            for (x = tmp - 1; x <= tmp + 1; x++) {
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                if (x == tmp && y == tmp2)
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                    continue;
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                diff = CMP(cx - x, cy - y);
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                if (diff < smallest) {
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                    smallest = diff;
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                    mv->x = x;
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                    mv->y = y;
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                }
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            }
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        }
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    }
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    if (smallest > 512) {
177
        mv->x = -1;
178
        mv->y = -1;
179
    }
180
    emms_c();
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    //av_log(NULL, AV_LOG_ERROR, "%d\n", smallest);
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    //av_log(NULL, AV_LOG_ERROR, "Final: (%d, %d) = %d x %d\n", cx, cy, mv->x, mv->y);
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}
184
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/**
186
 * Find the contrast of a given block. When searching for global motion we
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 * really only care about the high contrast blocks, so using this method we
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 * can actually skip blocks we don't care much about.
189
 */
190
static int block_contrast(uint8_t *src, int x, int y, int stride, int blocksize)
191
{
192
    int highest = 0;
193
    int lowest = 255;
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    int i, j, pos;
195
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    for (i = 0; i <= blocksize * 2; i++) {
197
        // We use a width of 16 here to match the sad function
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        for (j = 0; j <= 15; j++) {
199
            pos = (y + i) * stride + (x + j);
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            if (src[pos] < lowest)
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                lowest = src[pos];
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            else if (src[pos] > highest) {
203
                highest = src[pos];
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            }
205
        }
206
    }
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    return highest - lowest;
209
}
210
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/**
212
 * Find the rotation for a given block.
213
 */
214
static double block_angle(int x, int y, int cx, int cy, IntMotionVector *shift)
215
{
216
    double a1, a2, diff;
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    a1 = atan2(y - cy, x - cx);
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    a2 = atan2(y - cy + shift->y, x - cx + shift->x);
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    diff = a2 - a1;
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    return (diff > M_PI)  ? diff - 2 * M_PI :
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           (diff < -M_PI) ? diff + 2 * M_PI :
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           diff;
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}
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/**
229
 * Find the estimated global motion for a scene given the most likely shift
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 * for each block in the frame. The global motion is estimated to be the
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 * same as the motion from most blocks in the frame, so if most blocks
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 * move one pixel to the right and two pixels down, this would yield a
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 * motion vector (1, -2).
234
 */
235
static void find_motion(DeshakeContext *deshake, uint8_t *src1, uint8_t *src2,
236
                        int width, int height, int stride, Transform *t)
237
{
238
    int x, y;
239
    IntMotionVector mv = {0, 0};
240
    int count_max_value = 0;
241
    int contrast;
242
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    int pos;
244
    int center_x = 0, center_y = 0;
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    double p_x, p_y;
246
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    av_fast_malloc(&deshake->angles, &deshake->angles_size, width * height / (16 * deshake->blocksize) * sizeof(*deshake->angles));
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    // Reset counts to zero
250
    for (x = 0; x < deshake->rx * 2 + 1; x++) {
251
        for (y = 0; y < deshake->ry * 2 + 1; y++) {
252
            deshake->counts[x][y] = 0;
253
        }
254
    }
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256
    pos = 0;
257
    // Find motion for every block and store the motion vector in the counts
258
    for (y = deshake->ry; y < height - deshake->ry - (deshake->blocksize * 2); y += deshake->blocksize * 2) {
259
        // We use a width of 16 here to match the sad function
260
        for (x = deshake->rx; x < width - deshake->rx - 16; x += 16) {
261
            // If the contrast is too low, just skip this block as it probably
262
            // won't be very useful to us.
263
            contrast = block_contrast(src2, x, y, stride, deshake->blocksize);
264
            if (contrast > deshake->contrast) {
265
                //av_log(NULL, AV_LOG_ERROR, "%d\n", contrast);
266
                find_block_motion(deshake, src1, src2, x, y, stride, &mv);
267
                if (mv.x != -1 && mv.y != -1) {
268
                    deshake->counts[mv.x + deshake->rx][mv.y + deshake->ry] += 1;
269
                    if (x > deshake->rx && y > deshake->ry)
270
                        deshake->angles[pos++] = block_angle(x, y, 0, 0, &mv);
271
272
                    center_x += mv.x;
273
                    center_y += mv.y;
274
                }
275
            }
276
        }
277
    }
278
279
    if (pos) {
280
         center_x /= pos;
281
         center_y /= pos;
282
         t->angle = clean_mean(deshake->angles, pos);
283
         if (t->angle < 0.001)
284
              t->angle = 0;
285
    } else {
286
         t->angle = 0;
287
    }
288
289
    // Find the most common motion vector in the frame and use it as the gmv
290
    for (y = deshake->ry * 2; y >= 0; y--) {
291
        for (x = 0; x < deshake->rx * 2 + 1; x++) {
292
            //av_log(NULL, AV_LOG_ERROR, "%5d ", deshake->counts[x][y]);
293
            if (deshake->counts[x][y] > count_max_value) {
294
                t->vec.x = x - deshake->rx;
295
                t->vec.y = y - deshake->ry;
296
                count_max_value = deshake->counts[x][y];
297
            }
298
        }
299
        //av_log(NULL, AV_LOG_ERROR, "\n");
300
    }
301
302
    p_x = (center_x - width / 2.0);
303
    p_y = (center_y - height / 2.0);
304
    t->vec.x += (cos(t->angle)-1)*p_x  - sin(t->angle)*p_y;
305
    t->vec.y += sin(t->angle)*p_x  + (cos(t->angle)-1)*p_y;
306
307
    // Clamp max shift & rotation?
308
    t->vec.x = av_clipf(t->vec.x, -deshake->rx * 2, deshake->rx * 2);
309
    t->vec.y = av_clipf(t->vec.y, -deshake->ry * 2, deshake->ry * 2);
310
    t->angle = av_clipf(t->angle, -0.1, 0.1);
311
312
    //av_log(NULL, AV_LOG_ERROR, "%d x %d\n", avg->x, avg->y);
313
}
314
315
static int deshake_transform_c(AVFilterContext *ctx,
316
                                    int width, int height, int cw, int ch,
317
                                    const float *matrix_y, const float *matrix_uv,
318
                                    enum InterpolateMethod interpolate,
319
                                    enum FillMethod fill, AVFrame *in, AVFrame *out)
320
{
321
    int i = 0, ret = 0;
322
    const float *matrixs[3];
323
    int plane_w[3], plane_h[3];
324
    matrixs[0] = matrix_y;
325
    matrixs[1] =  matrixs[2] = matrix_uv;
326
    plane_w[0] = width;
327
    plane_w[1] = plane_w[2] = cw;
328
    plane_h[0] = height;
329
    plane_h[1] = plane_h[2] = ch;
330
331
    for (i = 0; i < 3; i++) {
332
        // Transform the luma and chroma planes
333
        ret = avfilter_transform(in->data[i], out->data[i], in->linesize[i], out->linesize[i],
334
                                 plane_w[i], plane_h[i], matrixs[i], interpolate, fill);
335
        if (ret < 0)
336
            return ret;
337
    }
338
    return ret;
339
}
340
341
static av_cold int init(AVFilterContext *ctx)
342
{
343
    DeshakeContext *deshake = ctx->priv;
344
345
    deshake->refcount = 20; // XXX: add to options?
346
    deshake->blocksize /= 2;
347
    deshake->blocksize = av_clip(deshake->blocksize, 4, 128);
348
349
    if (deshake->rx % 16) {
350
        av_log(ctx, AV_LOG_ERROR, "rx must be a multiple of 16\n");
351
        return AVERROR_PATCHWELCOME;
352
    }
353
354
    if (deshake->filename)
355
        deshake->fp = fopen(deshake->filename, "w");
356
    if (deshake->fp)
357
        fwrite("Ori x, Avg x, Fin x, Ori y, Avg y, Fin y, Ori angle, Avg angle, Fin angle, Ori zoom, Avg zoom, Fin zoom\n", 1, 104, deshake->fp);
358
359
    // Quadword align left edge of box for MMX code, adjust width if necessary
360
    // to keep right margin
361
    if (deshake->cx > 0) {
362
        deshake->cw += deshake->cx - (deshake->cx & ~15);
363
        deshake->cx &= ~15;
364
    }
365
    deshake->transform = deshake_transform_c;
366
367
    av_log(ctx, AV_LOG_VERBOSE, "cx: %d, cy: %d, cw: %d, ch: %d, rx: %d, ry: %d, edge: %d blocksize: %d contrast: %d search: %d\n",
368
           deshake->cx, deshake->cy, deshake->cw, deshake->ch,
369
           deshake->rx, deshake->ry, deshake->edge, deshake->blocksize * 2, deshake->contrast, deshake->search);
370
371
    return 0;
372
}
373
374
static int query_formats(AVFilterContext *ctx)
375
{
376
    static const enum AVPixelFormat pix_fmts[] = {
377
        AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P,  AV_PIX_FMT_YUV410P,
378
        AV_PIX_FMT_YUV411P,  AV_PIX_FMT_YUV440P,  AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
379
        AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_NONE
380
    };
381
    AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
382
    if (!fmts_list)
383
        return AVERROR(ENOMEM);
384
    return ff_set_common_formats(ctx, fmts_list);
385
}
386
387
static int config_props(AVFilterLink *link)
388
{
389
    DeshakeContext *deshake = link->dst->priv;
390
391
    deshake->ref = NULL;
392
    deshake->last.vec.x = 0;
393
    deshake->last.vec.y = 0;
394
    deshake->last.angle = 0;
395
    deshake->last.zoom = 0;
396
397
    return 0;
398
}
399
400
static av_cold void uninit(AVFilterContext *ctx)
401
{
402
    DeshakeContext *deshake = ctx->priv;
403
    av_frame_free(&deshake->ref);
404
    av_freep(&deshake->angles);
405
    deshake->angles_size = 0;
406
    if (deshake->fp)
407
        fclose(deshake->fp);
408
}
409
410
static int filter_frame(AVFilterLink *link, AVFrame *in)
411
{
412
    DeshakeContext *deshake = link->dst->priv;
413
    AVFilterLink *outlink = link->dst->outputs[0];
414
    AVFrame *out;
415
    Transform t = {{0},0}, orig = {{0},0};
416
    float matrix_y[9], matrix_uv[9];
417
    float alpha = 2.0 / deshake->refcount;
418
    char tmp[256];
419
    int ret = 0;
420
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
421
    const int chroma_width  = AV_CEIL_RSHIFT(link->w, desc->log2_chroma_w);
422
    const int chroma_height = AV_CEIL_RSHIFT(link->h, desc->log2_chroma_h);
423
    int aligned;
424
    float transform_zoom;
425
426
    out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
427
    if (!out) {
428
        av_frame_free(&in);
429
        return AVERROR(ENOMEM);
430
    }
431
    av_frame_copy_props(out, in);
432
433
    aligned = !((intptr_t)in->data[0] & 15 | in->linesize[0] & 15);
434
    deshake->sad = av_pixelutils_get_sad_fn(4, 4, aligned, deshake); // 16x16, 2nd source unaligned
435
    if (!deshake->sad)
436
        return AVERROR(EINVAL);
437
438
    if (deshake->cx < 0 || deshake->cy < 0 || deshake->cw < 0 || deshake->ch < 0) {
439
        // Find the most likely global motion for the current frame
440
        find_motion(deshake, (deshake->ref == NULL) ? in->data[0] : deshake->ref->data[0], in->data[0], link->w, link->h, in->linesize[0], &t);
441
    } else {
442
        uint8_t *src1 = (deshake->ref == NULL) ? in->data[0] : deshake->ref->data[0];
443
        uint8_t *src2 = in->data[0];
444
445
        deshake->cx = FFMIN(deshake->cx, link->w);
446
        deshake->cy = FFMIN(deshake->cy, link->h);
447
448
        if ((unsigned)deshake->cx + (unsigned)deshake->cw > link->w) deshake->cw = link->w - deshake->cx;
449
        if ((unsigned)deshake->cy + (unsigned)deshake->ch > link->h) deshake->ch = link->h - deshake->cy;
450
451
        // Quadword align right margin
452
        deshake->cw &= ~15;
453
454
        src1 += deshake->cy * in->linesize[0] + deshake->cx;
455
        src2 += deshake->cy * in->linesize[0] + deshake->cx;
456
457
        find_motion(deshake, src1, src2, deshake->cw, deshake->ch, in->linesize[0], &t);
458
    }
459
460
461
    // Copy transform so we can output it later to compare to the smoothed value
462
    orig.vec.x = t.vec.x;
463
    orig.vec.y = t.vec.y;
464
    orig.angle = t.angle;
465
    orig.zoom = t.zoom;
466
467
    // Generate a one-sided moving exponential average
468
    deshake->avg.vec.x = alpha * t.vec.x + (1.0 - alpha) * deshake->avg.vec.x;
469
    deshake->avg.vec.y = alpha * t.vec.y + (1.0 - alpha) * deshake->avg.vec.y;
470
    deshake->avg.angle = alpha * t.angle + (1.0 - alpha) * deshake->avg.angle;
471
    deshake->avg.zoom = alpha * t.zoom + (1.0 - alpha) * deshake->avg.zoom;
472
473
    // Remove the average from the current motion to detect the motion that
474
    // is not on purpose, just as jitter from bumping the camera
475
    t.vec.x -= deshake->avg.vec.x;
476
    t.vec.y -= deshake->avg.vec.y;
477
    t.angle -= deshake->avg.angle;
478
    t.zoom -= deshake->avg.zoom;
479
480
    // Invert the motion to undo it
481
    t.vec.x *= -1;
482
    t.vec.y *= -1;
483
    t.angle *= -1;
484
485
    // Write statistics to file
486
    if (deshake->fp) {
487
        snprintf(tmp, 256, "%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f\n", orig.vec.x, deshake->avg.vec.x, t.vec.x, orig.vec.y, deshake->avg.vec.y, t.vec.y, orig.angle, deshake->avg.angle, t.angle, orig.zoom, deshake->avg.zoom, t.zoom);
488
        fwrite(tmp, 1, strlen(tmp), deshake->fp);
489
    }
490
491
    // Turn relative current frame motion into absolute by adding it to the
492
    // last absolute motion
493
    t.vec.x += deshake->last.vec.x;
494
    t.vec.y += deshake->last.vec.y;
495
    t.angle += deshake->last.angle;
496
    t.zoom += deshake->last.zoom;
497
498
    // Shrink motion by 10% to keep things centered in the camera frame
499
    t.vec.x *= 0.9;
500
    t.vec.y *= 0.9;
501
    t.angle *= 0.9;
502
503
    // Store the last absolute motion information
504
    deshake->last.vec.x = t.vec.x;
505
    deshake->last.vec.y = t.vec.y;
506
    deshake->last.angle = t.angle;
507
    deshake->last.zoom = t.zoom;
508
509
    transform_zoom = 1.0 + t.zoom / 100.0;
510
511
    // Generate a luma transformation matrix
512
    ff_get_matrix(t.vec.x, t.vec.y, t.angle, transform_zoom, transform_zoom, matrix_y);
513
    // Generate a chroma transformation matrix
514
    ff_get_matrix(t.vec.x / (link->w / chroma_width), t.vec.y / (link->h / chroma_height), t.angle, transform_zoom, transform_zoom, matrix_uv);
515
    // Transform the luma and chroma planes
516
    ret = deshake->transform(link->dst, link->w, link->h, chroma_width, chroma_height,
517
                             matrix_y, matrix_uv, INTERPOLATE_BILINEAR, deshake->edge, in, out);
518
519
    // Cleanup the old reference frame
520
    av_frame_free(&deshake->ref);
521
522
    if (ret < 0)
523
        goto fail;
524
525
    // Store the current frame as the reference frame for calculating the
526
    // motion of the next frame
527
    deshake->ref = in;
528
529
    return ff_filter_frame(outlink, out);
530
fail:
531
    av_frame_free(&out);
532
    return ret;
533
}
534
535
static const AVFilterPad deshake_inputs[] = {
536
    {
537
        .name         = "default",
538
        .type         = AVMEDIA_TYPE_VIDEO,
539
        .filter_frame = filter_frame,
540
        .config_props = config_props,
541
    },
542
    { NULL }
543
};
544
545
static const AVFilterPad deshake_outputs[] = {
546
    {
547
        .name = "default",
548
        .type = AVMEDIA_TYPE_VIDEO,
549
    },
550
    { NULL }
551
};
552
553
AVFilter ff_vf_deshake = {
554
    .name          = "deshake",
555
    .description   = NULL_IF_CONFIG_SMALL("Stabilize shaky video."),
556
    .priv_size     = sizeof(DeshakeContext),
557
    .init          = init,
558
    .uninit        = uninit,
559
    .query_formats = query_formats,
560
    .inputs        = deshake_inputs,
561
    .outputs       = deshake_outputs,
562
    .priv_class    = &deshake_class,
563
};