/*
* Copyright (c) 2013 Oka Motofumi (chikuzen.mo at gmail dot com)
* Copyright (c) 2016 Paul B Mahol
*
* 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
*/
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "framesync.h"
#define OFFSET(x) offsetof(HysteresisContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
typedef struct HysteresisContext {
const AVClass *class;
FFFrameSync fs;
int planes;
int threshold;
int width[4], height[4];
int nb_planes;
int depth;
uint8_t *map;
uint32_t *xy;
int index;
void (*hysteresis)(struct HysteresisContext *s, const uint8_t *bsrc, const uint8_t *osrc, uint8_t *dst,
ptrdiff_t blinesize, ptrdiff_t olinesize,
ptrdiff_t destlinesize,
int w, int h);
} HysteresisContext;
static const AVOption hysteresis_options[] = {
{ "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
{ "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
{ NULL }
};
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY16,
AV_PIX_FMT_NONE
};
return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
}
static int process_frame(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
HysteresisContext *s = fs->opaque;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out, *base, *alt;
int ret;
if ((ret = ff_framesync_get_frame(&s->fs, 0, &base, 0)) < 0 ||
(ret = ff_framesync_get_frame(&s->fs, 1, &alt, 0)) < 0)
return ret;
if (ctx->is_disabled) {
out = av_frame_clone(base);
if (!out)
return AVERROR(ENOMEM);
} else {
int p;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
return AVERROR(ENOMEM);
av_frame_copy_props(out, base);
for (p = 0; p < s->nb_planes; p++) {
if (!((1 << p) & s->planes)) {
av_image_copy_plane(out->data[p], out->linesize[p], base->data[p], base->linesize[p],
s->width[p], s->height[p]);
continue;
} else {
int y;
for (y = 0; y < s->height[p]; y++) {
memset(out->data[p] + y * out->linesize[p], 0, s->width[p]);
}
}
s->index = -1;
memset(s->map, 0, s->width[0] * s->height[0]);
memset(s->xy, 0, s->width[0] * s->height[0] * 4);
s->hysteresis(s, base->data[p], alt->data[p],
out->data[p],
base->linesize[p], alt->linesize[p],
out->linesize[p],
s->width[p], s->height[p]);
}
}
out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
return ff_filter_frame(outlink, out);
}
static int passed(HysteresisContext *s, int x, int y, int w)
{
return s->map[x + y * w];
}
static void push(HysteresisContext *s, int x, int y, int w)
{
s->map[x + y * w] = 0xff;
s->xy[++s->index] = (uint16_t)(x) << 16 | (uint16_t)y;
}
static void pop(HysteresisContext *s, int *x, int *y)
{
uint32_t val = s->xy[s->index--];
*x = val >> 16;
*y = val & 0x0000FFFF;
}
static int is_empty(HysteresisContext *s)
{
return s->index < 0;
}
static void hysteresis8(HysteresisContext *s, const uint8_t *bsrc, const uint8_t *asrc,
uint8_t *dst,
ptrdiff_t blinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h)
{
const int t = s->threshold;
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if ((bsrc[x + y * blinesize] > t) && (asrc[x + y * alinesize] > t) && !passed(s, x, y, w)) {
int posx, posy;
dst[x + y * dlinesize] = asrc[x + y * alinesize];
push(s, x, y, w);
while (!is_empty(s)) {
int x_min, x_max, y_min, y_max, yy, xx;
pop(s, &posx, &posy);
x_min = posx > 0 ? posx - 1 : 0;
x_max = posx < w - 1 ? posx + 1 : posx;
y_min = posy > 0 ? posy - 1 : 0;
y_max = posy < h - 1 ? posy + 1 : posy;
for (yy = y_min; yy <= y_max; yy++) {
for (xx = x_min; xx <= x_max; xx++) {
if ((asrc[xx + yy * alinesize] > t) && !passed(s, xx, yy, w)) {
dst[xx + yy * dlinesize] = asrc[xx + yy * alinesize];
push(s, xx, yy, w);
}
}
}
}
}
}
}
}
static void hysteresis16(HysteresisContext *s, const uint8_t *bbsrc, const uint8_t *aasrc,
uint8_t *ddst,
ptrdiff_t blinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h)
{
const uint16_t *bsrc = (const uint16_t *)bbsrc;
const uint16_t *asrc = (const uint16_t *)aasrc;
uint16_t *dst = (uint16_t *)ddst;
const int t = s->threshold;
int x, y;
blinesize /= 2;
alinesize /= 2;
dlinesize /= 2;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if ((bsrc[x + y * blinesize] > t) && (asrc[x + y * alinesize] > t) && !passed(s, x, y, w)) {
int posx, posy;
dst[x + y * dlinesize] = asrc[x + y * alinesize];
push(s, x, y, w);
while (!is_empty(s)) {
int x_min, x_max, y_min, y_max, yy, xx;
pop(s, &posx, &posy);
x_min = posx > 0 ? posx - 1 : 0;
x_max = posx < w - 1 ? posx + 1 : posx;
y_min = posy > 0 ? posy - 1 : 0;
y_max = posy < h - 1 ? posy + 1 : posy;
for (yy = y_min; yy <= y_max; yy++) {
for (xx = x_min; xx <= x_max; xx++) {
if ((asrc[xx + yy * alinesize] > t) && !passed(s, xx, yy, w)) {
dst[xx + yy * dlinesize] = asrc[xx + yy * alinesize];
push(s, xx, yy, w);
}
}
}
}
}
}
}
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
HysteresisContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int vsub, hsub;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
hsub = desc->log2_chroma_w;
vsub = desc->log2_chroma_h;
s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
s->height[0] = s->height[3] = inlink->h;
s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
s->width[0] = s->width[3] = inlink->w;
s->depth = desc->comp[0].depth;
if (desc->comp[0].depth == 8)
s->hysteresis = hysteresis8;
else
s->hysteresis = hysteresis16;
s->map = av_calloc(inlink->w, inlink->h * sizeof (*s->map));
if (!s->map)
return AVERROR(ENOMEM);
s->xy = av_calloc(inlink->w, inlink->h * sizeof(*s->xy));
if (!s->xy)
return AVERROR(ENOMEM);
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
HysteresisContext *s = ctx->priv;
AVFilterLink *base = ctx->inputs[0];
AVFilterLink *alt = ctx->inputs[1];
FFFrameSyncIn *in;
int ret;
if (base->format != alt->format) {
av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
return AVERROR(EINVAL);
}
if (base->w != alt->w || base->h != alt->h) {
av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
"(size %dx%d) do not match the corresponding "
"second input link %s parameters (size %dx%d)\n",
ctx->input_pads[0].name, base->w, base->h,
ctx->input_pads[1].name,
alt->w, alt->h);
return AVERROR(EINVAL);
}
outlink->w = base->w;
outlink->h = base->h;
outlink->time_base = base->time_base;
outlink->sample_aspect_ratio = base->sample_aspect_ratio;
outlink->frame_rate = base->frame_rate;
if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
return ret;
in = s->fs.in;
in[0].time_base = base->time_base;
in[1].time_base = alt->time_base;
in[0].sync = 1;
in[0].before = EXT_STOP;
in[0].after = EXT_INFINITY;
in[1].sync = 1;
in[1].before = EXT_STOP;
in[1].after = EXT_INFINITY;
s->fs.opaque = s;
s->fs.on_event = process_frame;
return ff_framesync_configure(&s->fs);
}
static int activate(AVFilterContext *ctx)
{
HysteresisContext *s = ctx->priv;
return ff_framesync_activate(&s->fs);
}
static av_cold void uninit(AVFilterContext *ctx)
{
HysteresisContext *s = ctx->priv;
ff_framesync_uninit(&s->fs);
av_freep(&s->map);
av_freep(&s->xy);
}
FRAMESYNC_DEFINE_CLASS(hysteresis, HysteresisContext, fs);
static const AVFilterPad hysteresis_inputs[] = {
{
.name = "base",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
},
{
.name = "alt",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
static const AVFilterPad hysteresis_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};
AVFilter ff_vf_hysteresis = {
.name = "hysteresis",
.description = NULL_IF_CONFIG_SMALL("Grow first stream into second stream by connecting components."),
.preinit = hysteresis_framesync_preinit,
.priv_size = sizeof(HysteresisContext),
.uninit = uninit,
.query_formats = query_formats,
.activate = activate,
.inputs = hysteresis_inputs,
.outputs = hysteresis_outputs,
.priv_class = &hysteresis_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
};