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Code Issues Releases Activity

avfilter/bbox: add support for >8 depth

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This commit is contained in:
Paul B Mahol 2021-01-17 12:06:01 +01:00
parent 294854bd0a
commit 9b44f99329
4 changed files with 71 additions and 56 deletions
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119
libavfilter/bbox.c
View File

@ -20,56 +20,71 @@
#include "bbox.h"
int ff_calculate_bounding_box(FFBoundingBox *bbox,
const uint8_t *data, int linesize, int w, int h,
int min_val)
{
int x, y;
int start_x;
int start_y;
int end_x;
int end_y;
const uint8_t *line;
/* left bound */
for (start_x = 0; start_x < w; start_x++)
for (y = 0; y < h; y++)
if ((data[y * linesize + start_x] > min_val))
goto outl;
outl:
if (start_x == w) /* no points found */
return 0;
/* right bound */
for (end_x = w - 1; end_x >= start_x; end_x--)
for (y = 0; y < h; y++)
if ((data[y * linesize + end_x] > min_val))
goto outr;
outr:
/* top bound */
line = data;
for (start_y = 0; start_y < h; start_y++) {
for (x = 0; x < w; x++)
if (line[x] > min_val)
goto outt;
line += linesize;
}
outt:
/* bottom bound */
line = data + (h-1)*linesize;
for (end_y = h - 1; end_y >= start_y; end_y--) {
for (x = 0; x < w; x++)
if (line[x] > min_val)
goto outb;
line -= linesize;
}
outb:
bbox->x1 = start_x;
bbox->y1 = start_y;
bbox->x2 = end_x;
bbox->y2 = end_y;
return 1;
#define BBOX(type, name) \
static int bbox_##name(FFBoundingBox *bbox, \
const type *data, int linesize, int w, int h, \
int min_val) \
{ \
int x, y; \
int start_x; \
int start_y; \
int end_x; \
int end_y; \
const type *line; \
\
/* left bound */ \
for (start_x = 0; start_x < w; start_x++) \
for (y = 0; y < h; y++) \
if ((data[y * linesize + start_x] > min_val)) \
goto outl; \
outl: \
if (start_x == w) /* no points found */ \
return 0; \
\
/* right bound */ \
for (end_x = w - 1; end_x >= start_x; end_x--) \
for (y = 0; y < h; y++) \
if ((data[y * linesize + end_x] > min_val)) \
goto outr; \
outr: \
\
/* top bound */ \
line = data; \
for (start_y = 0; start_y < h; start_y++) { \
for (x = 0; x < w; x++) \
if (line[x] > min_val) \
goto outt; \
line += linesize; \
} \
outt: \
\
/* bottom bound */ \
line = data + (h-1)*linesize; \
for (end_y = h - 1; end_y >= start_y; end_y--) { \
for (x = 0; x < w; x++) \
if (line[x] > min_val) \
goto outb; \
line -= linesize; \
} \
outb: \
\
bbox->x1 = start_x; \
bbox->y1 = start_y; \
bbox->x2 = end_x; \
bbox->y2 = end_y; \
return 1; \
}
BBOX(uint8_t, 8)
BBOX(uint16_t, 16)
int ff_calculate_bounding_box(FFBoundingBox *bbox,
const uint8_t *data, int linesize,
int w, int h,
int min_val, int depth)
{
if (depth <= 8)
return bbox_8(bbox, data, linesize, w, h, min_val);
else
return bbox_16(bbox, (const uint16_t *)data, linesize / 2, w, h, min_val);
}

2
libavfilter/bbox.h
View File

@ -39,6 +39,6 @@ typedef struct FFBoundingBox {
*/
int ff_calculate_bounding_box(FFBoundingBox *bbox,
const uint8_t *data, int linesize,
int w, int h, int min_val);
int w, int h, int min_val, int depth);
#endif /* AVFILTER_BBOX_H */

2
libavfilter/vf_bbox.c
View File

@ -75,7 +75,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
has_bbox =
ff_calculate_bounding_box(&box,
frame->data[0], frame->linesize[0],
inlink->w, inlink->h, bbox->min_val);
inlink->w, inlink->h, bbox->min_val, 8);
w = box.x2 - box.x1 + 1;
h = box.y2 - box.y1 + 1;

4
libavfilter/vf_removelogo.c
View File

@ -342,8 +342,8 @@ static av_cold int init(AVFilterContext *ctx)
/* Calculate our bounding rectangles, which determine in what
* region the logo resides for faster processing. */
ff_calculate_bounding_box(&s->full_mask_bbox, s->full_mask_data, w, w, h, 0);
ff_calculate_bounding_box(&s->half_mask_bbox, s->half_mask_data, w/2, w/2, h/2, 0);
ff_calculate_bounding_box(&s->full_mask_bbox, s->full_mask_data, w, w, h, 0, 8);
ff_calculate_bounding_box(&s->half_mask_bbox, s->half_mask_data, w/2, w/2, h/2, 0, 8);
#define SHOW_LOGO_INFO(mask_type) \
av_log(ctx, AV_LOG_VERBOSE, #mask_type " x1:%d x2:%d y1:%d y2:%d max_mask_size:%d\n", \