mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
052f4f859c
* commit 'a5e8c41c28f907d98d2a739db08f7aef4cbfcf3a': lavfi: remove 'opaque' parameter from AVFilter.init() mov: do not try to read total disc/track number if data atom is too short. avconv: fix -force_key_frames dxva2_h264: fix signaling of mbaff frames x86: fft: elf64: fix PIC build Conflicts: ffmpeg.c libavcodec/v210dec.h libavfilter/asrc_anullsrc.c libavfilter/buffersrc.c libavfilter/src_movie.c libavfilter/vf_drawtext.c libavfilter/vf_fade.c libavfilter/vf_overlay.c libavfilter/vsrc_color.c libavfilter/vsrc_testsrc.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
562 lines
19 KiB
C
562 lines
19 KiB
C
/*
|
|
* Copyright (C) 2010 Georg Martius <georg.martius@web.de>
|
|
* Copyright (C) 2010 Daniel G. Taylor <dan@programmer-art.org>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 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
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser 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
|
|
* fast deshake / depan video filter
|
|
*
|
|
* SAD block-matching motion compensation to fix small changes in
|
|
* horizontal and/or vertical shift. This filter helps remove camera shake
|
|
* from hand-holding a camera, bumping a tripod, moving on a vehicle, etc.
|
|
*
|
|
* Algorithm:
|
|
* - For each frame with one previous reference frame
|
|
* - For each block in the frame
|
|
* - If contrast > threshold then find likely motion vector
|
|
* - For all found motion vectors
|
|
* - Find most common, store as global motion vector
|
|
* - Find most likely rotation angle
|
|
* - Transform image along global motion
|
|
*
|
|
* TODO:
|
|
* - Fill frame edges based on previous/next reference frames
|
|
* - Fill frame edges by stretching image near the edges?
|
|
* - Can this be done quickly and look decent?
|
|
*
|
|
* Dark Shikari links to http://wiki.videolan.org/SoC_x264_2010#GPU_Motion_Estimation_2
|
|
* for an algorithm similar to what could be used here to get the gmv
|
|
* It requires only a couple diamond searches + fast downscaling
|
|
*
|
|
* Special thanks to Jason Kotenko for his help with the algorithm and my
|
|
* inability to see simple errors in C code.
|
|
*/
|
|
|
|
#include "avfilter.h"
|
|
#include "formats.h"
|
|
#include "video.h"
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/mem.h"
|
|
#include "libavutil/pixdesc.h"
|
|
#include "libavcodec/dsputil.h"
|
|
|
|
#include "transform.h"
|
|
|
|
#define CHROMA_WIDTH(link) -((-link->w) >> av_pix_fmt_descriptors[link->format].log2_chroma_w)
|
|
#define CHROMA_HEIGHT(link) -((-link->h) >> av_pix_fmt_descriptors[link->format].log2_chroma_h)
|
|
|
|
enum SearchMethod {
|
|
EXHAUSTIVE, ///< Search all possible positions
|
|
SMART_EXHAUSTIVE, ///< Search most possible positions (faster)
|
|
SEARCH_COUNT
|
|
};
|
|
|
|
typedef struct {
|
|
int x; ///< Horizontal shift
|
|
int y; ///< Vertical shift
|
|
} IntMotionVector;
|
|
|
|
typedef struct {
|
|
double x; ///< Horizontal shift
|
|
double y; ///< Vertical shift
|
|
} MotionVector;
|
|
|
|
typedef struct {
|
|
MotionVector vector; ///< Motion vector
|
|
double angle; ///< Angle of rotation
|
|
double zoom; ///< Zoom percentage
|
|
} Transform;
|
|
|
|
typedef struct {
|
|
AVClass av_class;
|
|
AVFilterBufferRef *ref; ///< Previous frame
|
|
int rx; ///< Maximum horizontal shift
|
|
int ry; ///< Maximum vertical shift
|
|
enum FillMethod edge; ///< Edge fill method
|
|
int blocksize; ///< Size of blocks to compare
|
|
int contrast; ///< Contrast threshold
|
|
enum SearchMethod search; ///< Motion search method
|
|
AVCodecContext *avctx;
|
|
DSPContext c; ///< Context providing optimized SAD methods
|
|
Transform last; ///< Transform from last frame
|
|
int refcount; ///< Number of reference frames (defines averaging window)
|
|
FILE *fp;
|
|
Transform avg;
|
|
int cw; ///< Crop motion search to this box
|
|
int ch;
|
|
int cx;
|
|
int cy;
|
|
} DeshakeContext;
|
|
|
|
static int cmp(const double *a, const double *b)
|
|
{
|
|
return *a < *b ? -1 : ( *a > *b ? 1 : 0 );
|
|
}
|
|
|
|
/**
|
|
* Cleaned mean (cuts off 20% of values to remove outliers and then averages)
|
|
*/
|
|
static double clean_mean(double *values, int count)
|
|
{
|
|
double mean = 0;
|
|
int cut = count / 5;
|
|
int x;
|
|
|
|
qsort(values, count, sizeof(double), (void*)cmp);
|
|
|
|
for (x = cut; x < count - cut; x++) {
|
|
mean += values[x];
|
|
}
|
|
|
|
return mean / (count - cut * 2);
|
|
}
|
|
|
|
/**
|
|
* Find the most likely shift in motion between two frames for a given
|
|
* macroblock. Test each block against several shifts given by the rx
|
|
* and ry attributes. Searches using a simple matrix of those shifts and
|
|
* chooses the most likely shift by the smallest difference in blocks.
|
|
*/
|
|
static void find_block_motion(DeshakeContext *deshake, uint8_t *src1,
|
|
uint8_t *src2, int cx, int cy, int stride,
|
|
IntMotionVector *mv)
|
|
{
|
|
int x, y;
|
|
int diff;
|
|
int smallest = INT_MAX;
|
|
int tmp, tmp2;
|
|
|
|
#define CMP(i, j) deshake->c.sad[0](deshake, src1 + cy * stride + cx, \
|
|
src2 + (j) * stride + (i), stride, \
|
|
deshake->blocksize)
|
|
|
|
if (deshake->search == EXHAUSTIVE) {
|
|
// Compare every possible position - this is sloooow!
|
|
for (y = -deshake->ry; y <= deshake->ry; y++) {
|
|
for (x = -deshake->rx; x <= deshake->rx; x++) {
|
|
diff = CMP(cx - x, cy - y);
|
|
if (diff < smallest) {
|
|
smallest = diff;
|
|
mv->x = x;
|
|
mv->y = y;
|
|
}
|
|
}
|
|
}
|
|
} else if (deshake->search == SMART_EXHAUSTIVE) {
|
|
// Compare every other possible position and find the best match
|
|
for (y = -deshake->ry + 1; y < deshake->ry - 2; y += 2) {
|
|
for (x = -deshake->rx + 1; x < deshake->rx - 2; x += 2) {
|
|
diff = CMP(cx - x, cy - y);
|
|
if (diff < smallest) {
|
|
smallest = diff;
|
|
mv->x = x;
|
|
mv->y = y;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Hone in on the specific best match around the match we found above
|
|
tmp = mv->x;
|
|
tmp2 = mv->y;
|
|
|
|
for (y = tmp2 - 1; y <= tmp2 + 1; y++) {
|
|
for (x = tmp - 1; x <= tmp + 1; x++) {
|
|
if (x == tmp && y == tmp2)
|
|
continue;
|
|
|
|
diff = CMP(cx - x, cy - y);
|
|
if (diff < smallest) {
|
|
smallest = diff;
|
|
mv->x = x;
|
|
mv->y = y;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (smallest > 512) {
|
|
mv->x = -1;
|
|
mv->y = -1;
|
|
}
|
|
emms_c();
|
|
//av_log(NULL, AV_LOG_ERROR, "%d\n", smallest);
|
|
//av_log(NULL, AV_LOG_ERROR, "Final: (%d, %d) = %d x %d\n", cx, cy, mv->x, mv->y);
|
|
}
|
|
|
|
/**
|
|
* Find the contrast of a given block. When searching for global motion we
|
|
* really only care about the high contrast blocks, so using this method we
|
|
* can actually skip blocks we don't care much about.
|
|
*/
|
|
static int block_contrast(uint8_t *src, int x, int y, int stride, int blocksize)
|
|
{
|
|
int highest = 0;
|
|
int lowest = 0;
|
|
int i, j, pos;
|
|
|
|
for (i = 0; i <= blocksize * 2; i++) {
|
|
// We use a width of 16 here to match the libavcodec sad functions
|
|
for (j = 0; i <= 15; i++) {
|
|
pos = (y - i) * stride + (x - j);
|
|
if (src[pos] < lowest)
|
|
lowest = src[pos];
|
|
else if (src[pos] > highest) {
|
|
highest = src[pos];
|
|
}
|
|
}
|
|
}
|
|
|
|
return highest - lowest;
|
|
}
|
|
|
|
/**
|
|
* Find the rotation for a given block.
|
|
*/
|
|
static double block_angle(int x, int y, int cx, int cy, IntMotionVector *shift)
|
|
{
|
|
double a1, a2, diff;
|
|
|
|
a1 = atan2(y - cy, x - cx);
|
|
a2 = atan2(y - cy + shift->y, x - cx + shift->x);
|
|
|
|
diff = a2 - a1;
|
|
|
|
return (diff > M_PI) ? diff - 2 * M_PI :
|
|
(diff < -M_PI) ? diff + 2 * M_PI :
|
|
diff;
|
|
}
|
|
|
|
/**
|
|
* Find the estimated global motion for a scene given the most likely shift
|
|
* for each block in the frame. The global motion is estimated to be the
|
|
* same as the motion from most blocks in the frame, so if most blocks
|
|
* move one pixel to the right and two pixels down, this would yield a
|
|
* motion vector (1, -2).
|
|
*/
|
|
static void find_motion(DeshakeContext *deshake, uint8_t *src1, uint8_t *src2,
|
|
int width, int height, int stride, Transform *t)
|
|
{
|
|
int x, y;
|
|
IntMotionVector mv = {0, 0};
|
|
int counts[128][128];
|
|
int count_max_value = 0;
|
|
int contrast;
|
|
|
|
int pos;
|
|
double *angles = av_malloc(sizeof(*angles) * width * height / (16 * deshake->blocksize));
|
|
int center_x = 0, center_y = 0;
|
|
double p_x, p_y;
|
|
|
|
// Reset counts to zero
|
|
for (x = 0; x < deshake->rx * 2 + 1; x++) {
|
|
for (y = 0; y < deshake->ry * 2 + 1; y++) {
|
|
counts[x][y] = 0;
|
|
}
|
|
}
|
|
|
|
pos = 0;
|
|
// Find motion for every block and store the motion vector in the counts
|
|
for (y = deshake->ry; y < height - deshake->ry - (deshake->blocksize * 2); y += deshake->blocksize * 2) {
|
|
// We use a width of 16 here to match the libavcodec sad functions
|
|
for (x = deshake->rx; x < width - deshake->rx - 16; x += 16) {
|
|
// If the contrast is too low, just skip this block as it probably
|
|
// won't be very useful to us.
|
|
contrast = block_contrast(src2, x, y, stride, deshake->blocksize);
|
|
if (contrast > deshake->contrast) {
|
|
//av_log(NULL, AV_LOG_ERROR, "%d\n", contrast);
|
|
find_block_motion(deshake, src1, src2, x, y, stride, &mv);
|
|
if (mv.x != -1 && mv.y != -1) {
|
|
counts[mv.x + deshake->rx][mv.y + deshake->ry] += 1;
|
|
if (x > deshake->rx && y > deshake->ry)
|
|
angles[pos++] = block_angle(x, y, 0, 0, &mv);
|
|
|
|
center_x += mv.x;
|
|
center_y += mv.y;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pos) {
|
|
center_x /= pos;
|
|
center_y /= pos;
|
|
t->angle = clean_mean(angles, pos);
|
|
if (t->angle < 0.001)
|
|
t->angle = 0;
|
|
} else {
|
|
t->angle = 0;
|
|
}
|
|
|
|
// Find the most common motion vector in the frame and use it as the gmv
|
|
for (y = deshake->ry * 2; y >= 0; y--) {
|
|
for (x = 0; x < deshake->rx * 2 + 1; x++) {
|
|
//av_log(NULL, AV_LOG_ERROR, "%5d ", counts[x][y]);
|
|
if (counts[x][y] > count_max_value) {
|
|
t->vector.x = x - deshake->rx;
|
|
t->vector.y = y - deshake->ry;
|
|
count_max_value = counts[x][y];
|
|
}
|
|
}
|
|
//av_log(NULL, AV_LOG_ERROR, "\n");
|
|
}
|
|
|
|
p_x = (center_x - width / 2);
|
|
p_y = (center_y - height / 2);
|
|
t->vector.x += (cos(t->angle)-1)*p_x - sin(t->angle)*p_y;
|
|
t->vector.y += sin(t->angle)*p_x + (cos(t->angle)-1)*p_y;
|
|
|
|
// Clamp max shift & rotation?
|
|
t->vector.x = av_clipf(t->vector.x, -deshake->rx * 2, deshake->rx * 2);
|
|
t->vector.y = av_clipf(t->vector.y, -deshake->ry * 2, deshake->ry * 2);
|
|
t->angle = av_clipf(t->angle, -0.1, 0.1);
|
|
|
|
//av_log(NULL, AV_LOG_ERROR, "%d x %d\n", avg->x, avg->y);
|
|
av_free(angles);
|
|
}
|
|
|
|
static av_cold int init(AVFilterContext *ctx, const char *args)
|
|
{
|
|
DeshakeContext *deshake = ctx->priv;
|
|
char filename[256] = {0};
|
|
|
|
deshake->rx = 16;
|
|
deshake->ry = 16;
|
|
deshake->edge = FILL_MIRROR;
|
|
deshake->blocksize = 8;
|
|
deshake->contrast = 125;
|
|
deshake->search = EXHAUSTIVE;
|
|
deshake->refcount = 20;
|
|
|
|
deshake->cw = -1;
|
|
deshake->ch = -1;
|
|
deshake->cx = -1;
|
|
deshake->cy = -1;
|
|
|
|
if (args) {
|
|
sscanf(args, "%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%255s",
|
|
&deshake->cx, &deshake->cy, &deshake->cw, &deshake->ch,
|
|
&deshake->rx, &deshake->ry, (int *)&deshake->edge,
|
|
&deshake->blocksize, &deshake->contrast, (int *)&deshake->search, filename);
|
|
|
|
deshake->blocksize /= 2;
|
|
|
|
deshake->rx = av_clip(deshake->rx, 0, 64);
|
|
deshake->ry = av_clip(deshake->ry, 0, 64);
|
|
deshake->edge = av_clip(deshake->edge, FILL_BLANK, FILL_COUNT - 1);
|
|
deshake->blocksize = av_clip(deshake->blocksize, 4, 128);
|
|
deshake->contrast = av_clip(deshake->contrast, 1, 255);
|
|
deshake->search = av_clip(deshake->search, EXHAUSTIVE, SEARCH_COUNT - 1);
|
|
|
|
}
|
|
if (*filename)
|
|
deshake->fp = fopen(filename, "w");
|
|
if (deshake->fp)
|
|
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", sizeof(char), 104, deshake->fp);
|
|
|
|
// Quadword align left edge of box for MMX code, adjust width if necessary
|
|
// to keep right margin
|
|
if (deshake->cx > 0) {
|
|
deshake->cw += deshake->cx - (deshake->cx & ~15);
|
|
deshake->cx &= ~15;
|
|
}
|
|
|
|
av_log(ctx, AV_LOG_INFO, "cx: %d, cy: %d, cw: %d, ch: %d, rx: %d, ry: %d, edge: %d blocksize: %d contrast: %d search: %d\n",
|
|
deshake->cx, deshake->cy, deshake->cw, deshake->ch,
|
|
deshake->rx, deshake->ry, deshake->edge, deshake->blocksize * 2, deshake->contrast, deshake->search);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
enum PixelFormat pix_fmts[] = {
|
|
PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_YUV410P,
|
|
PIX_FMT_YUV411P, PIX_FMT_YUV440P, PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P,
|
|
PIX_FMT_YUVJ444P, PIX_FMT_YUVJ440P, PIX_FMT_NONE
|
|
};
|
|
|
|
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int config_props(AVFilterLink *link)
|
|
{
|
|
DeshakeContext *deshake = link->dst->priv;
|
|
|
|
deshake->ref = NULL;
|
|
deshake->last.vector.x = 0;
|
|
deshake->last.vector.y = 0;
|
|
deshake->last.angle = 0;
|
|
deshake->last.zoom = 0;
|
|
|
|
deshake->avctx = avcodec_alloc_context3(NULL);
|
|
dsputil_init(&deshake->c, deshake->avctx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
DeshakeContext *deshake = ctx->priv;
|
|
|
|
avfilter_unref_buffer(deshake->ref);
|
|
if (deshake->fp)
|
|
fclose(deshake->fp);
|
|
if (deshake->avctx)
|
|
avcodec_close(deshake->avctx);
|
|
av_freep(&deshake->avctx);
|
|
}
|
|
|
|
static void end_frame(AVFilterLink *link)
|
|
{
|
|
DeshakeContext *deshake = link->dst->priv;
|
|
AVFilterBufferRef *in = link->cur_buf;
|
|
AVFilterBufferRef *out = link->dst->outputs[0]->out_buf;
|
|
Transform t = {{0},0}, orig = {{0},0};
|
|
float matrix[9];
|
|
float alpha = 2.0 / deshake->refcount;
|
|
char tmp[256];
|
|
|
|
if (deshake->cx < 0 || deshake->cy < 0 || deshake->cw < 0 || deshake->ch < 0) {
|
|
// Find the most likely global motion for the current frame
|
|
find_motion(deshake, (deshake->ref == NULL) ? in->data[0] : deshake->ref->data[0], in->data[0], link->w, link->h, in->linesize[0], &t);
|
|
} else {
|
|
uint8_t *src1 = (deshake->ref == NULL) ? in->data[0] : deshake->ref->data[0];
|
|
uint8_t *src2 = in->data[0];
|
|
|
|
deshake->cx = FFMIN(deshake->cx, link->w);
|
|
deshake->cy = FFMIN(deshake->cy, link->h);
|
|
|
|
if ((unsigned)deshake->cx + (unsigned)deshake->cw > link->w) deshake->cw = link->w - deshake->cx;
|
|
if ((unsigned)deshake->cy + (unsigned)deshake->ch > link->h) deshake->ch = link->h - deshake->cy;
|
|
|
|
// Quadword align right margin
|
|
deshake->cw &= ~15;
|
|
|
|
src1 += deshake->cy * in->linesize[0] + deshake->cx;
|
|
src2 += deshake->cy * in->linesize[0] + deshake->cx;
|
|
|
|
find_motion(deshake, src1, src2, deshake->cw, deshake->ch, in->linesize[0], &t);
|
|
}
|
|
|
|
|
|
// Copy transform so we can output it later to compare to the smoothed value
|
|
orig.vector.x = t.vector.x;
|
|
orig.vector.y = t.vector.y;
|
|
orig.angle = t.angle;
|
|
orig.zoom = t.zoom;
|
|
|
|
// Generate a one-sided moving exponential average
|
|
deshake->avg.vector.x = alpha * t.vector.x + (1.0 - alpha) * deshake->avg.vector.x;
|
|
deshake->avg.vector.y = alpha * t.vector.y + (1.0 - alpha) * deshake->avg.vector.y;
|
|
deshake->avg.angle = alpha * t.angle + (1.0 - alpha) * deshake->avg.angle;
|
|
deshake->avg.zoom = alpha * t.zoom + (1.0 - alpha) * deshake->avg.zoom;
|
|
|
|
// Remove the average from the current motion to detect the motion that
|
|
// is not on purpose, just as jitter from bumping the camera
|
|
t.vector.x -= deshake->avg.vector.x;
|
|
t.vector.y -= deshake->avg.vector.y;
|
|
t.angle -= deshake->avg.angle;
|
|
t.zoom -= deshake->avg.zoom;
|
|
|
|
// Invert the motion to undo it
|
|
t.vector.x *= -1;
|
|
t.vector.y *= -1;
|
|
t.angle *= -1;
|
|
|
|
// Write statistics to file
|
|
if (deshake->fp) {
|
|
snprintf(tmp, 256, "%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f\n", orig.vector.x, deshake->avg.vector.x, t.vector.x, orig.vector.y, deshake->avg.vector.y, t.vector.y, orig.angle, deshake->avg.angle, t.angle, orig.zoom, deshake->avg.zoom, t.zoom);
|
|
fwrite(tmp, sizeof(char), strlen(tmp), deshake->fp);
|
|
}
|
|
|
|
// Turn relative current frame motion into absolute by adding it to the
|
|
// last absolute motion
|
|
t.vector.x += deshake->last.vector.x;
|
|
t.vector.y += deshake->last.vector.y;
|
|
t.angle += deshake->last.angle;
|
|
t.zoom += deshake->last.zoom;
|
|
|
|
// Shrink motion by 10% to keep things centered in the camera frame
|
|
t.vector.x *= 0.9;
|
|
t.vector.y *= 0.9;
|
|
t.angle *= 0.9;
|
|
|
|
// Store the last absolute motion information
|
|
deshake->last.vector.x = t.vector.x;
|
|
deshake->last.vector.y = t.vector.y;
|
|
deshake->last.angle = t.angle;
|
|
deshake->last.zoom = t.zoom;
|
|
|
|
// Generate a luma transformation matrix
|
|
avfilter_get_matrix(t.vector.x, t.vector.y, t.angle, 1.0 + t.zoom / 100.0, matrix);
|
|
|
|
// Transform the luma plane
|
|
avfilter_transform(in->data[0], out->data[0], in->linesize[0], out->linesize[0], link->w, link->h, matrix, INTERPOLATE_BILINEAR, deshake->edge);
|
|
|
|
// Generate a chroma transformation matrix
|
|
avfilter_get_matrix(t.vector.x / (link->w / CHROMA_WIDTH(link)), t.vector.y / (link->h / CHROMA_HEIGHT(link)), t.angle, 1.0 + t.zoom / 100.0, matrix);
|
|
|
|
// Transform the chroma planes
|
|
avfilter_transform(in->data[1], out->data[1], in->linesize[1], out->linesize[1], CHROMA_WIDTH(link), CHROMA_HEIGHT(link), matrix, INTERPOLATE_BILINEAR, deshake->edge);
|
|
avfilter_transform(in->data[2], out->data[2], in->linesize[2], out->linesize[2], CHROMA_WIDTH(link), CHROMA_HEIGHT(link), matrix, INTERPOLATE_BILINEAR, deshake->edge);
|
|
|
|
// Store the current frame as the reference frame for calculating the
|
|
// motion of the next frame
|
|
if (deshake->ref != NULL)
|
|
avfilter_unref_buffer(deshake->ref);
|
|
|
|
// Cleanup the old reference frame
|
|
deshake->ref = in;
|
|
|
|
// Draw the transformed frame information
|
|
ff_draw_slice(link->dst->outputs[0], 0, link->h, 1);
|
|
ff_end_frame(link->dst->outputs[0]);
|
|
avfilter_unref_buffer(out);
|
|
}
|
|
|
|
static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
|
|
{
|
|
}
|
|
|
|
AVFilter avfilter_vf_deshake = {
|
|
.name = "deshake",
|
|
.description = NULL_IF_CONFIG_SMALL("Stabilize shaky video."),
|
|
|
|
.priv_size = sizeof(DeshakeContext),
|
|
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.query_formats = query_formats,
|
|
|
|
.inputs = (const AVFilterPad[]) {{ .name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.draw_slice = draw_slice,
|
|
.end_frame = end_frame,
|
|
.config_props = config_props,
|
|
.min_perms = AV_PERM_READ, },
|
|
{ .name = NULL}},
|
|
|
|
.outputs = (const AVFilterPad[]) {{ .name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO, },
|
|
{ .name = NULL}},
|
|
};
|