*/
#include "libavutil/avassert.h"
+#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
+#define PLANE_R 0x4
+#define PLANE_G 0x1
+#define PLANE_B 0x2
+#define PLANE_Y 0x1
+#define PLANE_U 0x2
+#define PLANE_V 0x4
+#define PLANE_A 0x8
+
enum FilterMode {
MODE_WIRES,
MODE_COLORMIX,
+ MODE_CANNY,
NB_MODE
};
uint8_t *tmpbuf;
uint16_t *gradients;
char *directions;
+ int width, height;
};
typedef struct EdgeDetectContext {
const AVClass *class;
struct plane_info planes[3];
+ int filter_planes;
int nb_planes;
double low, high;
uint8_t low_u8, high_u8;
{ "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_WIRES}, 0, NB_MODE-1, FLAGS, "mode" },
{ "wires", "white/gray wires on black", 0, AV_OPT_TYPE_CONST, {.i64=MODE_WIRES}, INT_MIN, INT_MAX, FLAGS, "mode" },
{ "colormix", "mix colors", 0, AV_OPT_TYPE_CONST, {.i64=MODE_COLORMIX}, INT_MIN, INT_MAX, FLAGS, "mode" },
+ { "canny", "detect edges on planes", 0, AV_OPT_TYPE_CONST, {.i64=MODE_CANNY}, INT_MIN, INT_MAX, FLAGS, "mode" },
+ { "planes", "set planes to filter", OFFSET(filter_planes), AV_OPT_TYPE_FLAGS, {.i64=7}, 1, 0x7, FLAGS, "flags" },
+ { "y", "filter luma plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_Y}, 0, 0, FLAGS, "flags" },
+ { "u", "filter u plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_U}, 0, 0, FLAGS, "flags" },
+ { "v", "filter v plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_V}, 0, 0, FLAGS, "flags" },
+ { "r", "filter red plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_R}, 0, 0, FLAGS, "flags" },
+ { "g", "filter green plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_G}, 0, 0, FLAGS, "flags" },
+ { "b", "filter blue plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_B}, 0, 0, FLAGS, "flags" },
{ NULL }
};
{
const EdgeDetectContext *edgedetect = ctx->priv;
static const enum AVPixelFormat wires_pix_fmts[] = {AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE};
+ static const enum AVPixelFormat canny_pix_fmts[] = {AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_GBRP, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE};
static const enum AVPixelFormat colormix_pix_fmts[] = {AV_PIX_FMT_GBRP, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE};
AVFilterFormats *fmts_list;
const enum AVPixelFormat *pix_fmts = NULL;
pix_fmts = wires_pix_fmts;
} else if (edgedetect->mode == MODE_COLORMIX) {
pix_fmts = colormix_pix_fmts;
+ } else if (edgedetect->mode == MODE_CANNY) {
+ pix_fmts = canny_pix_fmts;
} else {
av_assert0(0);
}
int p;
AVFilterContext *ctx = inlink->dst;
EdgeDetectContext *edgedetect = ctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
edgedetect->nb_planes = inlink->format == AV_PIX_FMT_GRAY8 ? 1 : 3;
for (p = 0; p < edgedetect->nb_planes; p++) {
struct plane_info *plane = &edgedetect->planes[p];
-
- plane->tmpbuf = av_malloc(inlink->w * inlink->h);
- plane->gradients = av_calloc(inlink->w * inlink->h, sizeof(*plane->gradients));
- plane->directions = av_malloc(inlink->w * inlink->h);
+ int vsub = p ? desc->log2_chroma_h : 0;
+ int hsub = p ? desc->log2_chroma_w : 0;
+
+ plane->width = AV_CEIL_RSHIFT(inlink->w, hsub);
+ plane->height = AV_CEIL_RSHIFT(inlink->h, vsub);
+ plane->tmpbuf = av_malloc(plane->width * plane->height);
+ plane->gradients = av_calloc(plane->width * plane->height, sizeof(*plane->gradients));
+ plane->directions = av_malloc(plane->width * plane->height);
if (!plane->tmpbuf || !plane->gradients || !plane->directions)
return AVERROR(ENOMEM);
}
int i, j;
memcpy(dst, src, w); dst += dst_linesize; src += src_linesize;
- memcpy(dst, src, w); dst += dst_linesize; src += src_linesize;
+ if (h > 1) {
+ memcpy(dst, src, w); dst += dst_linesize; src += src_linesize;
+ }
for (j = 2; j < h - 2; j++) {
dst[0] = src[0];
- dst[1] = src[1];
+ if (w > 1)
+ dst[1] = src[1];
for (i = 2; i < w - 2; i++) {
/* Gaussian mask of size 5x5 with sigma = 1.4 */
dst[i] = ((src[-2*src_linesize + i-2] + src[2*src_linesize + i-2]) * 2
+ src[i+1] * 12
+ src[i+2] * 5) / 159;
}
- dst[i ] = src[i ];
- dst[i + 1] = src[i + 1];
+ if (w > 2)
+ dst[i ] = src[i ];
+ if (w > 3)
+ dst[i + 1] = src[i + 1];
dst += dst_linesize;
src += src_linesize;
}
- memcpy(dst, src, w); dst += dst_linesize; src += src_linesize;
- memcpy(dst, src, w);
+ if (h > 2) {
+ memcpy(dst, src, w); dst += dst_linesize; src += src_linesize;
+ }
+ if (h > 3)
+ memcpy(dst, src, w);
}
enum {
if (gx < 0)
gx = -gx, gy = -gy;
- gy <<= 16;
+ gy *= (1 << 16);
tanpi8gx = 27146 * gx;
tan3pi8gx = 158218 * gx;
if (gy > -tan3pi8gx && gy < -tanpi8gx) return DIRECTION_45UP;
continue;
}
- if ((!i || i == w - 1 || !j || j == h - 1) &&
+ if (!(!i || i == w - 1 || !j || j == h - 1) &&
src[i] > low &&
(src[-src_linesize + i-1] > high ||
src[-src_linesize + i ] > high ||
uint8_t *tmpbuf = plane->tmpbuf;
uint16_t *gradients = plane->gradients;
int8_t *directions = plane->directions;
+ const int width = plane->width;
+ const int height = plane->height;
+
+ if (!((1 << p) & edgedetect->filter_planes)) {
+ if (!direct)
+ av_image_copy_plane(out->data[p], out->linesize[p],
+ in->data[p], in->linesize[p],
+ width, height);
+ continue;
+ }
/* gaussian filter to reduce noise */
- gaussian_blur(ctx, inlink->w, inlink->h,
- tmpbuf, inlink->w,
+ gaussian_blur(ctx, width, height,
+ tmpbuf, width,
in->data[p], in->linesize[p]);
/* compute the 16-bits gradients and directions for the next step */
- sobel(inlink->w, inlink->h,
- gradients, inlink->w,
- directions,inlink->w,
- tmpbuf, inlink->w);
+ sobel(width, height,
+ gradients, width,
+ directions,width,
+ tmpbuf, width);
/* non_maximum_suppression() will actually keep & clip what's necessary and
* ignore the rest, so we need a clean output buffer */
- memset(tmpbuf, 0, inlink->w * inlink->h);
- non_maximum_suppression(inlink->w, inlink->h,
- tmpbuf, inlink->w,
- directions,inlink->w,
- gradients, inlink->w);
+ memset(tmpbuf, 0, width * height);
+ non_maximum_suppression(width, height,
+ tmpbuf, width,
+ directions,width,
+ gradients, width);
/* keep high values, or low values surrounded by high values */
double_threshold(edgedetect->low_u8, edgedetect->high_u8,
- inlink->w, inlink->h,
+ width, height,
out->data[p], out->linesize[p],
- tmpbuf, inlink->w);
+ tmpbuf, width);
if (edgedetect->mode == MODE_COLORMIX) {
- color_mix(inlink->w, inlink->h,
+ color_mix(width, height,
out->data[p], out->linesize[p],
in->data[p], in->linesize[p]);
}
projects / ffmpeg / blobdiff