#include <stdlib.h>
#include <math.h>
#include <string.h>
+#include "arrow_code.h"
-#define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
#define ABS(a) ((a) >= 0 ? (a) : (-(a)))
-#ifdef DEBUG
-// ffmpeg borrowed
-static inline int clip(int a, int amin, int amax)
-{
- if (a < amin)
- return amin;
- else if (a > amax)
- return amax;
- else
- return a;
-}
-
-
-/**
- * draws an line from (ex, ey) -> (sx, sy).
- * Credits: modified from ffmpeg project
- * @param ystride stride/linesize of the image
- * @param xstride stride/element size of the image
- * @param color color of the arrow
- */
-static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int xstride, int ystride, int color){
- int t, x, y, fr, f;
-
-// buf[sy*ystride + sx*xstride]= color;
- buf[sy*ystride + sx]+= color;
-
- sx= clip(sx, 0, w-1);
- sy= clip(sy, 0, h-1);
- ex= clip(ex, 0, w-1);
- ey= clip(ey, 0, h-1);
-
- if(ABS(ex - sx) > ABS(ey - sy)){
- if(sx > ex){
- t=sx; sx=ex; ex=t;
- t=sy; sy=ey; ey=t;
- }
- buf+= sx*xstride + sy*ystride;
- ex-= sx;
- f= ((ey-sy)<<16)/ex;
- for(x= 0; x <= ex; x++){
- y = (x*f)>>16;
- fr= (x*f)&0xFFFF;
- buf[ y *ystride + x*xstride]= (color*(0x10000-fr))>>16;
- buf[(y+1)*ystride + x*xstride]= (color* fr )>>16;
- }
- }else{
- if(sy > ey){
- t=sx; sx=ex; ex=t;
- t=sy; sy=ey; ey=t;
- }
- buf+= sx*xstride + sy*ystride;
- ey-= sy;
- if(ey) f= ((ex-sx)<<16)/ey;
- else f= 0;
- for(y= 0; y <= ey; y++){
- x = (y*f)>>16;
- fr= (y*f)&0xFFFF;
- buf[y*ystride + x *xstride]= (color*(0x10000-fr))>>16;;
- buf[y*ystride + (x+1)*xstride]= (color* fr )>>16;;
- }
- }
-}
-
-/**
- * draws an arrow from (ex, ey) -> (sx, sy).
- * Credits: modified from ffmpeg project
- * @param stride stride/linesize of the image
- * @param color color of the arrow
- */
-static void draw_arrow(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int xstride, int ystride, int color){
- int dx,dy;
-
- dx= ex - sx;
- dy= ey - sy;
-
- if(dx*dx + dy*dy > 3*3){
- int rx= dx + dy;
- int ry= -dx + dy;
- int length= sqrt((rx*rx + ry*ry)<<4);
-
- //FIXME subpixel accuracy
- rx= ROUNDED_DIV(rx*3<<4, length);
- ry= ROUNDED_DIV(ry*3<<4, length);
-
- draw_line(buf, sx, sy, sx + rx, sy + ry, w, h, xstride, ystride, color);
- draw_line(buf, sx, sy, sx - ry, sy + rx, w, h, xstride, ystride, color);
- }
- draw_line(buf, sx, sy, ex, ey, w, h, xstride, ystride, color);
-}
-#endif
-
// Image stack(able) method
static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
{
mlt_properties_set_data( properties, "bounds", bounds, sizeof( struct mlt_geometry_item_s ), free, NULL );
}
-// mlt_properties first = (mlt_properties) mlt_deque_peek_front( MLT_FRAME_SERVICE_STACK(this) );
-// int current_producer_id = mlt_properties_get_int( first, "_unique_id");
-// int former_producer_id = mlt_properties_get_int(properties, "_former_unique_id");
-// mlt_properties_set_int(properties, "_former_unique_id", current_producer_id);
-
// For periodic detection (with offset of 'skip')
if( frequency == 0 || (mlt_frame_get_position(this)+skip) % frequency != 0)
{
}
int x, y, average_brightness, deviation; // Scratch variables
+ uint8_t *q;
// Top crop
for( y = 0; y < *height/2; y++ ) {
+ bounds->y = y;
average_brightness = 0;
deviation = 0;
- bounds->y = y;
+ q = *image + y*ystride;
for( x = 0; x < *width; x++ )
- average_brightness += *(*image + y*ystride + x*xstride);
+ average_brightness += q[x*xstride];
average_brightness /= *width;
for( x = 0; x < *width; x++ )
- deviation += abs(average_brightness - *(*image + y*ystride + x*xstride));
+ deviation += abs(average_brightness - q[x*xstride]);
- if( deviation >= thresh )
+ if( deviation*10 >= thresh * *width )
break;
}
// Bottom crop
for( y = *height - 1; y >= *height/2; y-- ) {
+ bounds->h = y;
average_brightness = 0;
deviation = 0;
- bounds->h = y;
+ q = *image + y*ystride;
for( x = 0; x < *width; x++ )
- average_brightness += *(*image + y*ystride + x*xstride);
+ average_brightness += q[x*xstride];
average_brightness /= *width;
for( x = 0; x < *width; x++ )
- deviation += abs(average_brightness - *(*image + y*ystride + x*xstride));
+ deviation += abs(average_brightness - q[x*xstride]);
- if( deviation >= thresh )
+ if( deviation*10 >= thresh * *width)
break;
}
// Left crop
for( x = 0; x < *width/2; x++ ) {
+ bounds->x = x;
average_brightness = 0;
deviation = 0;
- bounds->x = x;
+ q = *image + x*xstride;
for( y = 0; y < *height; y++ )
- average_brightness += *(*image + y*ystride + x*xstride);
+ average_brightness += q[y*ystride];
average_brightness /= *height;
for( y = 0; y < *height; y++ )
- deviation += abs(average_brightness - *(*image + y*ystride + x*xstride));
+ deviation += abs(average_brightness - q[y*ystride]);
- if( deviation >= thresh )
+ if( deviation*10 >= thresh * *width )
break;
}
// Right crop
for( x = *width - 1; x >= *width/2; x-- ) {
+ bounds->w = x;
average_brightness = 0;
deviation = 0;
- bounds->w = x;
+ q = *image + x*xstride;
for( y = 0; y < *height; y++ )
- average_brightness += *(*image + y*ystride + x*xstride);
+ average_brightness += q[y*ystride];
average_brightness /= *height;
for( y = 0; y < *height; y++ )
- deviation += abs(average_brightness - *(*image + y*ystride + x*xstride));
+ deviation += abs(average_brightness - q[y*ystride]);
- if( deviation >= thresh )
+ if( deviation*10 >= thresh * *width )
break;
}
/* Debug: Draw arrows to show crop */
if( mlt_properties_get_int( properties, "debug") == 1 )
{
- draw_arrow(*image, bounds->x, *height/2, bounds->x+40, *height/2, *width, *height, xstride, ystride, 0xff);
- draw_arrow(*image, *width/2, bounds->y, *width/2, bounds->y+40, *width, *height, xstride, ystride, 0xff);
- draw_arrow(*image, bounds->w, *height/2, bounds->w-40, *height/2, *width, *height, xstride, ystride, 0xff);
- draw_arrow(*image, *width/2, bounds->h, *width/2, bounds->h-40, *width, *height, xstride, ystride, 0xff);
-
- fprintf(stderr, "Top:%f Left:%f Right:%f Bottom:%f\n", bounds->y, bounds->x, bounds->w, bounds->h);
+ init_arrows( format, *width, *height );
+
+ draw_arrow(*image, bounds->x, *height/2, bounds->x+50, *height/2, 100);
+ draw_arrow(*image, *width/2, bounds->y, *width/2, bounds->y+50, 100);
+ draw_arrow(*image, bounds->w, *height/2, bounds->w-50, *height/2, 100);
+ draw_arrow(*image, *width/2, bounds->h, *width/2, bounds->h-50, 100);
+ draw_arrow(*image, bounds->x, bounds->y, bounds->x+40, bounds->y+30, 100);
+ draw_arrow(*image, bounds->x, bounds->h, bounds->x+40, bounds->h-30, 100);
+ draw_arrow(*image, bounds->w, bounds->y, bounds->w-40, bounds->y+30, 100);
+ draw_arrow(*image, bounds->w, bounds->h, bounds->w-40, bounds->h-30, 100);
}
- bounds->w -= bounds->x;
- bounds->h -= bounds->y;
+ // Convert to width and correct indexing
+ bounds->w -= bounds->x - 1;
+ bounds->h -= bounds->y - 1;
+
+ if( mlt_properties_get_int( properties, "debug") == 1 )
+ fprintf(stderr, "Top:%f Left:%f Width:%f Height:%f\n", bounds->y, bounds->x, bounds->w, bounds->h);
/* inject into frame */
mlt_properties_set_data( MLT_FRAME_PROPERTIES(this), "bounds", bounds, sizeof( struct mlt_geometry_item_s ), NULL, NULL );
-
return error;
}
/* defaults */
mlt_properties_set_int( MLT_FILTER_PROPERTIES(this), "frequency", 1);
- mlt_properties_set_int( MLT_FILTER_PROPERTIES(this), "thresh", 25);
+ mlt_properties_set_int( MLT_FILTER_PROPERTIES(this), "thresh", 5);
mlt_properties_set_int( MLT_FILTER_PROPERTIES(this), "clip", 5);
mlt_properties_set_int( MLT_FILTER_PROPERTIES(this), "former_producer_id", -1);
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