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ffmpeg.wasm-core
Commit 171a5b5d authored by Michael Niedermayer's avatar Michael Niedermayer
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deshake: remove non const static 

Signed-off-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
parent 1912c215
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Showing with 11 additions and 18 deletions
libavfilter/vf_deshake.c
View file @ 171a5b5d
...@@ -90,6 +90,7 @@ typedef struct { ...@@ -90,6 +90,7 @@ typedef struct {
Transform last; ///< Transform from last frame Transform last; ///< Transform from last frame
int refcount; ///< Number of reference frames (defines averaging window) int refcount; ///< Number of reference frames (defines averaging window)
FILE *fp; FILE *fp;
Transform avg;
} DeshakeContext; } DeshakeContext;
static int cmp(void const *ca, void const *cb) static int cmp(void const *ca, void const *cb)
...@@ -404,15 +405,7 @@ static void end_frame(AVFilterLink *link) ...@@ -404,15 +405,7 @@ static void end_frame(AVFilterLink *link)
AVFilterBufferRef *in = link->cur_buf; AVFilterBufferRef *in = link->cur_buf;
AVFilterBufferRef *out = link->dst->outputs[0]->out_buf; AVFilterBufferRef *out = link->dst->outputs[0]->out_buf;
Transform t; Transform t;
static float matrix[9]; float matrix[9];
static Transform avg = {
.vector = {
.x = 0,
.y = 0
},
.angle = 0,
.zoom = 0.0f
};
float alpha = 2.0 / deshake->refcount; float alpha = 2.0 / deshake->refcount;
char tmp[256]; char tmp[256];
Transform orig; Transform orig;
...@@ -427,17 +420,17 @@ static void end_frame(AVFilterLink *link) ...@@ -427,17 +420,17 @@ static void end_frame(AVFilterLink *link)
orig.zoom = t.zoom; orig.zoom = t.zoom;
// Generate a one-sided moving exponential average // Generate a one-sided moving exponential average
avg.vector.x = alpha * t.vector.x + (1.0 - alpha) * avg.vector.x; deshake->avg.vector.x = alpha * t.vector.x + (1.0 - alpha) * deshake->avg.vector.x;
avg.vector.y = alpha * t.vector.y + (1.0 - alpha) * avg.vector.y; deshake->avg.vector.y = alpha * t.vector.y + (1.0 - alpha) * deshake->avg.vector.y;
avg.angle = alpha * t.angle + (1.0 - alpha) * avg.angle; deshake->avg.angle = alpha * t.angle + (1.0 - alpha) * deshake->avg.angle;
avg.zoom = alpha * t.zoom + (1.0 - alpha) * avg.zoom; deshake->avg.zoom = alpha * t.zoom + (1.0 - alpha) * deshake->avg.zoom;
// Remove the average from the current motion to detect the motion that // Remove the average from the current motion to detect the motion that
// is not on purpose, just as jitter from bumping the camera // is not on purpose, just as jitter from bumping the camera
t.vector.x -= avg.vector.x; t.vector.x -= deshake->avg.vector.x;
t.vector.y -= avg.vector.y; t.vector.y -= deshake->avg.vector.y;
t.angle -= avg.angle; t.angle -= deshake->avg.angle;
t.zoom -= avg.zoom; t.zoom -= deshake->avg.zoom;
// Invert the motion to undo it // Invert the motion to undo it
t.vector.x *= -1; t.vector.x *= -1;
...@@ -445,7 +438,7 @@ static void end_frame(AVFilterLink *link) ...@@ -445,7 +438,7 @@ static void end_frame(AVFilterLink *link)
t.angle *= -1; t.angle *= -1;
// Write statistics to file // Write statistics to file
snprintf(tmp, 256, "%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f\n", orig.vector.x, avg.vector.x, t.vector.x, orig.vector.y, avg.vector.y, t.vector.y, orig.angle, avg.angle, t.angle, orig.zoom, avg.zoom, t.zoom); 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); fwrite(tmp, sizeof(char), strlen(tmp), deshake->fp);
// Turn relative current frame motion into absolute by adding it to the // Turn relative current frame motion into absolute by adding it to the
......
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