[FFmpeg-devel] [PATCH] avfilter: add deflicker filter
Paul B Mahol
onemda at gmail.com
Tue Apr 18 19:28:11 EEST 2017
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_deflicker.c | 327 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 329 insertions(+)
create mode 100644 libavfilter/vf_deflicker.c
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index d6daa7a..6de7cc0 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -155,6 +155,7 @@ OBJS-$(CONFIG_DCTDNOIZ_FILTER) += vf_dctdnoiz.o
OBJS-$(CONFIG_DEBAND_FILTER) += vf_deband.o
OBJS-$(CONFIG_DECIMATE_FILTER) += vf_decimate.o
OBJS-$(CONFIG_DEFLATE_FILTER) += vf_neighbor.o
+OBJS-$(CONFIG_DEFLICKER_FILTER) += vf_deflicker.o
OBJS-$(CONFIG_DEINTERLACE_QSV_FILTER) += vf_deinterlace_qsv.o
OBJS-$(CONFIG_DEINTERLACE_VAAPI_FILTER) += vf_deinterlace_vaapi.o
OBJS-$(CONFIG_DEJUDDER_FILTER) += vf_dejudder.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index ec6ec04..0e69f99 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -166,6 +166,7 @@ static void register_all(void)
REGISTER_FILTER(DEBAND, deband, vf);
REGISTER_FILTER(DECIMATE, decimate, vf);
REGISTER_FILTER(DEFLATE, deflate, vf);
+ REGISTER_FILTER(DEFLICKER, deflicker, vf);
REGISTER_FILTER(DEINTERLACE_QSV,deinterlace_qsv,vf);
REGISTER_FILTER(DEINTERLACE_VAAPI, deinterlace_vaapi, vf);
REGISTER_FILTER(DEJUDDER, dejudder, vf);
diff --git a/libavfilter/vf_deflicker.c b/libavfilter/vf_deflicker.c
new file mode 100644
index 0000000..5e9d957
--- /dev/null
+++ b/libavfilter/vf_deflicker.c
@@ -0,0 +1,327 @@
+/*
+ * Copyright (c) 2017 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/opt.h"
+#include "libavutil/pixdesc.h"
+#include "avfilter.h"
+
+#define FF_BUFQUEUE_SIZE 129
+#include "bufferqueue.h"
+
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+#define SIZE FF_BUFQUEUE_SIZE
+
+typedef struct DeflickerContext {
+ const AVClass *class;
+
+ int eof;
+ int depth;
+ int nb_planes;
+ int planewidth[4];
+ int planeheight[4];
+
+ uint64_t *histogram;
+ float luminance[SIZE];
+
+ struct FFBufQueue q;
+ int size;
+ int available;
+
+ float (*calc_avgy)(AVFilterContext *ctx, AVFrame *in);
+ int (*deflicker)(AVFilterContext *ctx, AVFrame *in, AVFrame *out);
+} DeflickerContext;
+
+#define OFFSET(x) offsetof(DeflickerContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption deflicker_options[] = {
+ { "s", "set how many frames to use", OFFSET(size), AV_OPT_TYPE_INT, {.i64=5}, 2, SIZE, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(deflicker);
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pixel_fmts[] = {
+ AV_PIX_FMT_GRAY8,
+ AV_PIX_FMT_GRAY10,
+ AV_PIX_FMT_GRAY12,
+ AV_PIX_FMT_GRAY16,
+ 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_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
+ AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
+ AV_PIX_FMT_YUV440P10,
+ AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
+ AV_PIX_FMT_YUV440P12,
+ AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
+ AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
+ 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 deflicker8(AVFilterContext *ctx, AVFrame *in, AVFrame *out)
+{
+ DeflickerContext *s = ctx->priv;
+ const int h = s->planeheight[0];
+ const int w = s->planewidth[0];
+ const uint8_t *src = in->data[0];
+ uint8_t *dst = out->data[0];
+ float f = 0;
+ int x, y;
+
+ for (y = 0; y < s->size; y++) {
+ f += s->luminance[y];
+ }
+ f /= s->size;
+ f /= s->luminance[0];
+
+ for (y = 0; y < h; y++) {
+ for (x = 0; x < w; x++) {
+ dst[x] = av_clip(src[x] * f, 0, (1 << s->depth) - 1);
+ }
+
+ dst += out->linesize[0];
+ src += in->linesize[0];
+ }
+
+ for (y = 1; y < s->nb_planes; y++) {
+ av_image_copy_plane(out->data[y], out->linesize[y],
+ in->data[y], in->linesize[y],
+ s->planewidth[y], s->planeheight[y]);
+ }
+
+ return 0;
+}
+
+static int deflicker16(AVFilterContext *ctx, AVFrame *in, AVFrame *out)
+{
+ DeflickerContext *s = ctx->priv;
+ const int h = s->planeheight[0];
+ const int w = s->planewidth[0];
+ const uint16_t *src = (const uint16_t *)in->data[0];
+ uint16_t *dst = (uint16_t *)out->data[0];
+ float f = 0;
+ int x, y;
+
+ for (y = 0; y < s->size; y++) {
+ f += s->luminance[y];
+ }
+ f /= s->size;
+ f /= s->luminance[0];
+
+ for (y = 0; y < h; y++) {
+ for (x = 0; x < w; x++) {
+ dst[x] = av_clip(src[x] * f, 0, (1 << s->depth) - 1);
+ }
+
+ dst += out->linesize[0] / 2;
+ src += in->linesize[0] / 2;
+ }
+
+ for (y = 1; y < s->nb_planes; y++) {
+ av_image_copy_plane(out->data[y], out->linesize[y],
+ in->data[y], in->linesize[y],
+ s->planewidth[y] * 2, s->planeheight[y]);
+ }
+
+ return 0;
+}
+
+static float calc_avgy8(AVFilterContext *ctx, AVFrame *in)
+{
+ DeflickerContext *s = ctx->priv;
+ const uint8_t *src = in->data[0];
+ int64_t sum = 0;
+ int y, x;
+
+ memset(s->histogram, 0, (1 << s->depth) * sizeof(*s->histogram));
+
+ for (y = 0; y < s->planeheight[0]; y++) {
+ for (x = 0; x < s->planewidth[0]; x++) {
+ s->histogram[src[x]]++;
+ }
+ src += in->linesize[0];
+ }
+
+ for (y = 0; y < 1 << s->depth; y++) {
+ sum += s->histogram[y] * y;
+ }
+
+ return 1.0 * sum / (s->planeheight[0] * s->planewidth[0]);
+}
+
+static float calc_avgy16(AVFilterContext *ctx, AVFrame *in)
+{
+ DeflickerContext *s = ctx->priv;
+ const uint16_t *src = (const uint16_t *)in->data[0];
+ int64_t sum = 0;
+ int y, x;
+
+ memset(s->histogram, 0, (1 << s->depth) * sizeof(*s->histogram));
+
+ for (y = 0; y < s->planeheight[0]; y++) {
+ for (x = 0; x < s->planewidth[0]; x++) {
+ s->histogram[src[x]]++;
+ }
+ src += in->linesize[0] / 2;
+ }
+
+ for (y = 0; y < 1 << s->depth; y++) {
+ sum += s->histogram[y] * y;
+ }
+
+ return 1.0 * sum / (s->planeheight[0] * s->planewidth[0]);
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ AVFilterContext *ctx = inlink->dst;
+ DeflickerContext *s = ctx->priv;
+
+ s->nb_planes = desc->nb_components;
+
+ s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
+ s->planeheight[0] = s->planeheight[3] = inlink->h;
+ s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
+ s->planewidth[0] = s->planewidth[3] = inlink->w;
+
+ s->depth = desc->comp[0].depth;
+ if (s->depth == 8) {
+ s->deflicker = deflicker8;
+ s->calc_avgy = calc_avgy8;
+ } else {
+ s->deflicker = deflicker16;
+ s->calc_avgy = calc_avgy16;
+ }
+
+ s->histogram = av_calloc(1 << s->depth, sizeof(*s->histogram));
+ if (!s->histogram)
+ return AVERROR(ENOMEM);
+
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
+{
+ AVFilterContext *ctx = inlink->dst;
+ AVFilterLink *outlink = ctx->outputs[0];
+ DeflickerContext *s = ctx->priv;
+ AVFrame *out, *in;
+
+ if (s->q.available < s->size && !s->eof) {
+ s->luminance[s->available] = s->calc_avgy(ctx, buf);
+ ff_bufqueue_add(ctx, &s->q, buf);
+ s->available++;
+ return 0;
+ }
+
+ in = ff_bufqueue_peek(&s->q, 0);
+
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out) {
+ av_frame_free(&buf);
+ return AVERROR(ENOMEM);
+ }
+
+ s->deflicker(ctx, in, out);
+ av_frame_copy_props(out, in);
+
+ in = ff_bufqueue_get(&s->q);
+ av_frame_free(&in);
+ memmove(&s->luminance[0], &s->luminance[1], sizeof(*s->luminance) * (s->size - 1));
+ s->luminance[s->available - 1] = s->calc_avgy(ctx, buf);
+ ff_bufqueue_add(ctx, &s->q, buf);
+
+ return ff_filter_frame(outlink, out);
+}
+
+static int request_frame(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ DeflickerContext *s = ctx->priv;
+ int ret = 0;
+
+ ret = ff_request_frame(ctx->inputs[0]);
+ if (ret == AVERROR_EOF && s->available > 0) {
+ AVFrame *buf = av_frame_clone(ff_bufqueue_peek(&s->q, s->size - 1));
+ if (!buf)
+ return AVERROR(ENOMEM);
+
+ s->eof = 1;
+ ret = filter_frame(ctx->inputs[0], buf);
+ s->available--;
+ }
+
+
+ return ret;
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ DeflickerContext *s = ctx->priv;
+
+ ff_bufqueue_discard_all(&s->q);
+ av_freep(&s->histogram);
+}
+
+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,
+ .request_frame = request_frame,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_deflicker = {
+ .name = "deflicker",
+ .description = NULL_IF_CONFIG_SMALL("Deflicker input video."),
+ .priv_size = sizeof(DeflickerContext),
+ .priv_class = &deflicker_class,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = inputs,
+ .outputs = outputs,
+};
--
2.9.3
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