Signed-off-by: Paul B Mahol <one...@gmail.com>
---
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_deflash.c | 199 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 201 insertions(+)
create mode 100644 libavfilter/vf_deflash.c
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 1f4abeb..f801566 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -122,6 +122,7 @@ OBJS-$(CONFIG_CURVES_FILTER) += vf_curves.o
OBJS-$(CONFIG_DCTDNOIZ_FILTER) += vf_dctdnoiz.o
OBJS-$(CONFIG_DEBAND_FILTER) += vf_deband.o
OBJS-$(CONFIG_DECIMATE_FILTER) += vf_decimate.o
+OBJS-$(CONFIG_DEFLASH_FILTER) += vf_deflash.o
OBJS-$(CONFIG_DEFLATE_FILTER) += vf_neighbor.o
OBJS-$(CONFIG_DEJUDDER_FILTER) += vf_dejudder.o
OBJS-$(CONFIG_DELOGO_FILTER) += vf_delogo.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 63b8fdb..daacbc3 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -144,6 +144,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(DCTDNOIZ, dctdnoiz, vf);
REGISTER_FILTER(DEBAND, deband, vf);
REGISTER_FILTER(DECIMATE, decimate, vf);
+ REGISTER_FILTER(DEFLASH, deflash, vf);
REGISTER_FILTER(DEFLATE, deflate, vf);
REGISTER_FILTER(DEJUDDER, dejudder, vf);
REGISTER_FILTER(DELOGO, delogo, vf);
diff --git a/libavfilter/vf_deflash.c b/libavfilter/vf_deflash.c
new file mode 100644
index 0000000..3167989
--- /dev/null
+++ b/libavfilter/vf_deflash.c
@@ -0,0 +1,199 @@
+/*
+ * 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/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/internal.h"
+#include "avfilter.h"
+
+#define FF_BUFQUEUE_SIZE 13
+#include "bufferqueue.h"
+
+#include "internal.h"
+#include "video.h"
+
+typedef struct DeFlashContext {
+ const AVClass *class;
+
+ AVFrame *frame;
+ float fthrd[4];
+ int thrd[4];
+ float fthrr[4];
+ int thrr[4];
+
+ struct FFBufQueue q;
+
+ int planeheight[4];
+ int planewidth[4];
+} DeFlashContext;
+
+#define OFFSET(x) offsetof(DeFlashContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption deflash_options[] = {
+ { "0fd", "set flash threshold detection for 1st color component",
OFFSET(fthrd[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.2}, 0, 5, FLAGS },
+ { "0fr", "set ammount of flash reduction for 1st color component",
OFFSET(fthrr[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.05}, 0, 1, FLAGS },
+ { "1fd", "set flash threshold detection for 2nd color component",
OFFSET(fthrd[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.2}, 0, 5, FLAGS },
+ { "1fr", "set ammount of flash reduction for 2nd color component",
OFFSET(fthrr[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.05}, 0, 1, FLAGS },
+ { "2fd", "set flash threshold detection for 3rd color component",
OFFSET(fthrd[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.2}, 0, 5, FLAGS },
+ { "2fr", "set ammount of flash reduction for 3rd color component",
OFFSET(fthrr[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.05}, 0, 1, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(deflash);
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pixel_fmts[] = {
+ AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
+ AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
+ AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
+ AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
+ AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
+ AV_PIX_FMT_YUVJ411P,
+ AV_PIX_FMT_NONE
+ };
+ AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
+ if (!formats)
+ return AVERROR(ENOMEM);
+ return ff_set_common_formats(ctx, formats);
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ AVFilterContext *ctx = inlink->dst;
+ DeFlashContext *s = ctx->priv;
+
+ s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(inlink->h,
desc->log2_chroma_h);
+ s->planeheight[0] = s->planeheight[3] = inlink->h;
+ s->planewidth[1] = s->planewidth[2] = FF_CEIL_RSHIFT(inlink->w,
desc->log2_chroma_w);
+ s->planewidth[0] = s->planewidth[3] = inlink->w;
+
+ s->thrd[0] = s->fthrd[0] * 255;
+ s->thrd[1] = s->fthrd[1] * 255;
+ s->thrd[2] = s->fthrd[2] * 255;
+ s->thrr[0] = s->fthrr[0] * 255;
+ s->thrr[1] = s->fthrr[1] * 255;
+ s->thrr[2] = s->fthrr[2] * 255;
+
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ DeFlashContext *s = ctx->priv;
+ AVFilterLink *outlink = inlink->dst->outputs[0];
+ AVFrame *out, *buf;
+ int ret, p;
+
+ if (!s->frame) {
+ s->frame = in;
+ return 0;
+ }
+ if (s->q.available != FF_BUFQUEUE_SIZE ) {
+ ff_bufqueue_add(ctx, &s->q, in);
+ return 0;
+ }
+
+ out = ff_get_video_buffer(outlink, in->width, in->height);
+ if (!out) {
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
+ av_frame_copy_props(out, in);
+
+ for (p = 0; p < 3; p++) {
+ AVFrame *n = ff_bufqueue_peek(&s->q, 0);
+ const uint8_t *src = s->frame->data[p];
+ const uint8_t *next = n->data[p];
+ const int h = s->planeheight[p];
+ const int w = s->planewidth[p];
+ const int thrd = s->thrd[p];
+ const int thrr = s->thrr[p];
+ uint8_t *dst = out->data[p];
+ int y, x, z;
+
+ for (y = 0; y < h; y++) {
+ for (x = 0; x < w; x++) {
+ int diff = next[x] - src[x];
+ int t = 0;
+
+ for (z = 0; z < FF_BUFQUEUE_SIZE - 1; z++) {
+ AVFrame *f1 = ff_bufqueue_peek(&s->q, z);
+ AVFrame *f2 = ff_bufqueue_peek(&s->q, z+1);
+
+ t += FFABS(f2->data[p][f2->linesize[p] * y + x] -
f1->data[p][f1->linesize[p] * y + x]);
+ }
+
+ if (t > thrd)
+ dst[x] = src[x] + thrr * diff / 255;
+ else
+ dst[x] = next[x];
+ }
+
+ dst += out->linesize[p];
+ src += s->frame->linesize[p];
+ next += n->linesize[p];
+ }
+ }
+
+ buf = ff_bufqueue_get(&s->q);
+ av_frame_free(&buf);
+ ff_bufqueue_add(ctx, &s->q, in);
+ ret = ff_filter_frame(outlink, s->frame);
+ s->frame = out;
+
+ return ret;
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ DeFlashContext *s = ctx->priv;
+}
+
+static const AVFilterPad inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_deflash = {
+ .name = "deflash",
+ .description = NULL_IF_CONFIG_SMALL("Deflash."),
+ .priv_size = sizeof(DeFlashContext),
+ .priv_class = &deflash_class,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = inputs,
+ .outputs = outputs,
+};
--
1.9.1
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