[FFmpeg-cvslog] avfilter: add BobWeaver deinterlacing filter
Thomas Mundt
git at videolan.org
Thu Feb 18 13:36:22 CET 2016
ffmpeg | branch: master | Thomas Mundt <loudmax at yahoo.de> | Mon Feb 8 01:00:42 2016 +0100| [da94d619f6419aa5feca2cd1eac868a5711d47eb] | committer: Paul B Mahol
avfilter: add BobWeaver deinterlacing filter
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=da94d619f6419aa5feca2cd1eac868a5711d47eb
---
Changelog | 1 +
doc/filters.texi | 53 ++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_bwdif.c | 625 ++++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 682 insertions(+), 1 deletion(-)
diff --git a/Changelog b/Changelog
index b59db92..7d672fb 100644
--- a/Changelog
+++ b/Changelog
@@ -5,6 +5,7 @@ version <next>:
- DXVA2-accelerated HEVC Main10 decoding
- fieldhint filter
- loop video filter and aloop audio filter
+- Bob Weaver deinterlacing filter
version 3.0:
diff --git a/doc/filters.texi b/doc/filters.texi
index d5ff21c..c533ef7 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -4256,6 +4256,59 @@ tblend=all_mode=difference128
@end example
@end itemize
+ at section bwdif
+
+Deinterlace the input video ("bwdif" stands for "Bob Weaver
+Deinterlacing Filter").
+
+Motion adaptive deinterlacing based on yadif with the use of w3fdif and cubic
+interpolation algorithms.
+It accepts the following parameters:
+
+ at table @option
+ at item mode
+The interlacing mode to adopt. It accepts one of the following values:
+
+ at table @option
+ at item 0, send_frame
+Output one frame for each frame.
+ at item 1, send_field
+Output one frame for each field.
+ at end table
+
+The default value is @code{send_field}.
+
+ at item parity
+The picture field parity assumed for the input interlaced video. It accepts one
+of the following values:
+
+ at table @option
+ at item 0, tff
+Assume the top field is first.
+ at item 1, bff
+Assume the bottom field is first.
+ at item -1, auto
+Enable automatic detection of field parity.
+ at end table
+
+The default value is @code{auto}.
+If the interlacing is unknown or the decoder does not export this information,
+top field first will be assumed.
+
+ at item deint
+Specify which frames to deinterlace. Accept one of the following
+values:
+
+ at table @option
+ at item 0, all
+Deinterlace all frames.
+ at item 1, interlaced
+Only deinterlace frames marked as interlaced.
+ at end table
+
+The default value is @code{all}.
+ at end table
+
@section boxblur
Apply a boxblur algorithm to the input video.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 082ec49..10c2e0b 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -119,6 +119,7 @@ OBJS-$(CONFIG_BLACKDETECT_FILTER) += vf_blackdetect.o
OBJS-$(CONFIG_BLACKFRAME_FILTER) += vf_blackframe.o
OBJS-$(CONFIG_BLEND_FILTER) += vf_blend.o dualinput.o framesync.o
OBJS-$(CONFIG_BOXBLUR_FILTER) += vf_boxblur.o
+OBJS-$(CONFIG_BWDIF_FILTER) += vf_bwdif.o
OBJS-$(CONFIG_CHROMAKEY_FILTER) += vf_chromakey.o
OBJS-$(CONFIG_CODECVIEW_FILTER) += vf_codecview.o
OBJS-$(CONFIG_COLORBALANCE_FILTER) += vf_colorbalance.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 4bce2af..ed52649 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -140,6 +140,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(BLACKFRAME, blackframe, vf);
REGISTER_FILTER(BLEND, blend, vf);
REGISTER_FILTER(BOXBLUR, boxblur, vf);
+ REGISTER_FILTER(BWDIF, bwdif, vf);
REGISTER_FILTER(CHROMAKEY, chromakey, vf);
REGISTER_FILTER(CODECVIEW, codecview, vf);
REGISTER_FILTER(COLORBALANCE, colorbalance, vf);
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 7dc1033..4a462e7 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -30,7 +30,7 @@
#include "libavutil/version.h"
#define LIBAVFILTER_VERSION_MAJOR 6
-#define LIBAVFILTER_VERSION_MINOR 33
+#define LIBAVFILTER_VERSION_MINOR 34
#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
diff --git a/libavfilter/vf_bwdif.c b/libavfilter/vf_bwdif.c
new file mode 100644
index 0000000..7985054
--- /dev/null
+++ b/libavfilter/vf_bwdif.c
@@ -0,0 +1,625 @@
+/*
+ * BobWeaver Deinterlacing Filter
+ * Copyright (C) 2016 Thomas Mundt <loudmax at yahoo.de>
+ *
+ * Based on YADIF (Yet Another Deinterlacing Filter)
+ * Copyright (C) 2006-2011 Michael Niedermayer <michaelni at gmx.at>
+ * 2010 James Darnley <james.darnley at gmail.com>
+ *
+ * With use of Weston 3 Field Deinterlacing Filter algorithm
+ * Copyright (C) 2012 British Broadcasting Corporation, All Rights Reserved
+ * Author of de-interlace algorithm: Jim Easterbrook for BBC R&D
+ * Based on the process described by Martin Weston for BBC R&D
+ *
+ * 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/avassert.h"
+#include "libavutil/common.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/imgutils.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+/*
+ * Filter coefficients coef_lf and coef_hf taken from BBC PH-2071 (Weston 3 Field Deinterlacer).
+ * Used when there is spatial and temporal interpolation.
+ * Filter coefficients coef_sp are used when there is spatial interpolation only.
+ * Adjusted for matching visual sharpness impression of spatial and temporal interpolation.
+ */
+static const uint16_t coef_lf[2] = { 4309, 213 };
+static const uint16_t coef_hf[3] = { 5570, 3801, 1016 };
+static const uint16_t coef_sp[2] = { 5077, 981 };
+
+enum BWDIFMode {
+ BWDIF_MODE_SEND_FRAME = 0, ///< send 1 frame for each frame
+ BWDIF_MODE_SEND_FIELD = 1, ///< send 1 frame for each field
+};
+
+enum BWDIFParity {
+ BWDIF_PARITY_TFF = 0, ///< top field first
+ BWDIF_PARITY_BFF = 1, ///< bottom field first
+ BWDIF_PARITY_AUTO = -1, ///< auto detection
+};
+
+enum BWDIFDeint {
+ BWDIF_DEINT_ALL = 0, ///< deinterlace all frames
+ BWDIF_DEINT_INTERLACED = 1, ///< only deinterlace frames marked as interlaced
+};
+
+typedef struct BWDIFContext {
+ const AVClass *class;
+
+ int mode; ///< BWDIFMode
+ int parity; ///< BWDIFParity
+ int deint; ///< BWDIFDeint
+
+ int frame_pending;
+
+ AVFrame *cur;
+ AVFrame *next;
+ AVFrame *prev;
+ AVFrame *out;
+
+ void (*filter_intra)(void *dst1, void *cur1, int w, int prefs, int mrefs,
+ int prefs3, int mrefs3, int parity, int clip_max);
+ void (*filter_line)(void *dst, void *prev, void *cur, void *next,
+ int w, int prefs, int mrefs, int prefs2, int mrefs2,
+ int prefs3, int mrefs3, int prefs4, int mrefs4,
+ int parity, int clip_max);
+ void (*filter_edge)(void *dst, void *prev, void *cur, void *next,
+ int w, int prefs, int mrefs, int prefs2, int mrefs2,
+ int parity, int clip_max, int spat);
+
+ const AVPixFmtDescriptor *csp;
+ int inter_field;
+ int eof;
+} BWDIFContext;
+
+typedef struct ThreadData {
+ AVFrame *frame;
+ int plane;
+ int w, h;
+ int parity;
+ int tff;
+} ThreadData;
+
+#define FILTER_INTRA() \
+ for (x = 0; x < w; x++) { \
+ interpol = (coef_sp[0] * (cur[mrefs] + cur[prefs]) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
+ dst[0] = av_clip(interpol, 0, clip_max); \
+ \
+ dst++; \
+ cur++; \
+ }
+
+#define FILTER1() \
+ for (x = 0; x < w; x++) { \
+ int c = cur[mrefs]; \
+ int d = (prev2[0] + next2[0]) >> 1; \
+ int e = cur[prefs]; \
+ int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
+ int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e)) >> 1; \
+ int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e)) >> 1; \
+ int diff = FFMAX3(temporal_diff0 >> 1, temporal_diff1, temporal_diff2); \
+ \
+ if (!diff) { \
+ dst[0] = d; \
+ } else {
+
+#define SPAT_CHECK() \
+ int b = ((prev2[mrefs2] + next2[mrefs2]) >> 1) - c; \
+ int f = ((prev2[prefs2] + next2[prefs2]) >> 1) - e; \
+ int dc = d - c; \
+ int de = d - e; \
+ int max = FFMAX3(de, dc, FFMIN(b, f)); \
+ int min = FFMIN3(de, dc, FFMAX(b, f)); \
+ diff = FFMAX3(diff, min, -max);
+
+#define FILTER_LINE() \
+ SPAT_CHECK() \
+ if (FFABS(c - e) > temporal_diff0) { \
+ interpol = (((coef_hf[0] * (prev2[0] + next2[0]) \
+ - coef_hf[1] * (prev2[mrefs2] + next2[mrefs2] + prev2[prefs2] + next2[prefs2]) \
+ + coef_hf[2] * (prev2[mrefs4] + next2[mrefs4] + prev2[prefs4] + next2[prefs4])) >> 2) \
+ + coef_lf[0] * (c + e) - coef_lf[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
+ } else { \
+ interpol = (coef_sp[0] * (c + e) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
+ }
+
+#define FILTER_EDGE() \
+ if (spat) { \
+ SPAT_CHECK() \
+ } \
+ interpol = (c + e) >> 1;
+
+#define FILTER2() \
+ if (interpol > d + diff) \
+ interpol = d + diff; \
+ else if (interpol < d - diff) \
+ interpol = d - diff; \
+ \
+ dst[0] = av_clip(interpol, 0, clip_max); \
+ } \
+ \
+ dst++; \
+ cur++; \
+ prev++; \
+ next++; \
+ prev2++; \
+ next2++; \
+ }
+
+static void filter_intra(void *dst1, void *cur1, int w, int prefs, int mrefs,
+ int prefs3, int mrefs3, int parity, int clip_max)
+{
+ uint8_t *dst = dst1;
+ uint8_t *cur = cur1;
+ int interpol, x;
+
+ FILTER_INTRA()
+}
+
+static void filter_line(void *dst1, void *prev1, void *cur1, void *next1,
+ int w, int prefs, int mrefs, int prefs2, int mrefs2,
+ int prefs3, int mrefs3, int prefs4, int mrefs4,
+ int parity, int clip_max)
+{
+ uint8_t *dst = dst1;
+ uint8_t *prev = prev1;
+ uint8_t *cur = cur1;
+ uint8_t *next = next1;
+ uint8_t *prev2 = parity ? prev : cur ;
+ uint8_t *next2 = parity ? cur : next;
+ int interpol, x;
+
+ FILTER1()
+ FILTER_LINE()
+ FILTER2()
+}
+
+static void filter_edge(void *dst1, void *prev1, void *cur1, void *next1,
+ int w, int prefs, int mrefs, int prefs2, int mrefs2,
+ int parity, int clip_max, int spat)
+{
+ uint8_t *dst = dst1;
+ uint8_t *prev = prev1;
+ uint8_t *cur = cur1;
+ uint8_t *next = next1;
+ uint8_t *prev2 = parity ? prev : cur ;
+ uint8_t *next2 = parity ? cur : next;
+ int interpol, x;
+
+ FILTER1()
+ FILTER_EDGE()
+ FILTER2()
+}
+
+static void filter_intra_16bit(void *dst1, void *cur1, int w, int prefs, int mrefs,
+ int prefs3, int mrefs3, int parity, int clip_max)
+{
+ uint16_t *dst = dst1;
+ uint16_t *cur = cur1;
+ int interpol, x;
+
+ FILTER_INTRA()
+}
+
+static void filter_line_16bit(void *dst1, void *prev1, void *cur1, void *next1,
+ int w, int prefs, int mrefs, int prefs2, int mrefs2,
+ int prefs3, int mrefs3, int prefs4, int mrefs4,
+ int parity, int clip_max)
+{
+ uint16_t *dst = dst1;
+ uint16_t *prev = prev1;
+ uint16_t *cur = cur1;
+ uint16_t *next = next1;
+ uint16_t *prev2 = parity ? prev : cur ;
+ uint16_t *next2 = parity ? cur : next;
+ int interpol, x;
+
+ FILTER1()
+ FILTER_LINE()
+ FILTER2()
+}
+
+static void filter_edge_16bit(void *dst1, void *prev1, void *cur1, void *next1,
+ int w, int prefs, int mrefs, int prefs2, int mrefs2,
+ int parity, int clip_max, int spat)
+{
+ uint16_t *dst = dst1;
+ uint16_t *prev = prev1;
+ uint16_t *cur = cur1;
+ uint16_t *next = next1;
+ uint16_t *prev2 = parity ? prev : cur ;
+ uint16_t *next2 = parity ? cur : next;
+ int interpol, x;
+
+ FILTER1()
+ FILTER_EDGE()
+ FILTER2()
+}
+
+static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ BWDIFContext *s = ctx->priv;
+ ThreadData *td = arg;
+ int linesize = s->cur->linesize[td->plane];
+ int clip_max = (1 << (s->csp->comp[td->plane].depth)) - 1;
+ int df = (s->csp->comp[td->plane].depth + 7) / 8;
+ int refs = linesize / df;
+ int slice_start = (td->h * jobnr ) / nb_jobs;
+ int slice_end = (td->h * (jobnr+1)) / nb_jobs;
+ int y;
+
+ for (y = slice_start; y < slice_end; y++) {
+ if ((y ^ td->parity) & 1) {
+ uint8_t *prev = &s->prev->data[td->plane][y * linesize];
+ uint8_t *cur = &s->cur ->data[td->plane][y * linesize];
+ uint8_t *next = &s->next->data[td->plane][y * linesize];
+ uint8_t *dst = &td->frame->data[td->plane][y * td->frame->linesize[td->plane]];
+ if (!s->inter_field) {
+ s->filter_intra(dst, cur, td->w, (y + df) < td->h ? refs : -refs,
+ y > (df - 1) ? -refs : refs,
+ (y + 3*df) < td->h ? 3 * refs : -refs,
+ y > (3*df - 1) ? -3 * refs : refs,
+ td->parity ^ td->tff, clip_max);
+ } else if ((y < 4) || ((y + 5) > td->h)) {
+ s->filter_edge(dst, prev, cur, next, td->w,
+ (y + df) < td->h ? refs : -refs,
+ y > (df - 1) ? -refs : refs,
+ refs << 1, -(refs << 1),
+ td->parity ^ td->tff, clip_max,
+ (y < 2) || ((y + 3) > td->h) ? 0 : 1);
+ } else {
+ s->filter_line(dst, prev, cur, next, td->w,
+ refs, -refs, refs << 1, -(refs << 1),
+ 3 * refs, -3 * refs, refs << 2, -(refs << 2),
+ td->parity ^ td->tff, clip_max);
+ }
+ } else {
+ memcpy(&td->frame->data[td->plane][y * td->frame->linesize[td->plane]],
+ &s->cur->data[td->plane][y * linesize], td->w * df);
+ }
+ }
+ return 0;
+}
+
+static void filter(AVFilterContext *ctx, AVFrame *dstpic,
+ int parity, int tff)
+{
+ BWDIFContext *bwdif = ctx->priv;
+ ThreadData td = { .frame = dstpic, .parity = parity, .tff = tff };
+ int i;
+
+ for (i = 0; i < bwdif->csp->nb_components; i++) {
+ int w = dstpic->width;
+ int h = dstpic->height;
+
+ if (i == 1 || i == 2) {
+ w = AV_CEIL_RSHIFT(w, bwdif->csp->log2_chroma_w);
+ h = AV_CEIL_RSHIFT(h, bwdif->csp->log2_chroma_h);
+ }
+
+ td.w = w;
+ td.h = h;
+ td.plane = i;
+
+ ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(h, ctx->graph->nb_threads));
+ }
+ if (!bwdif->inter_field) {
+ bwdif->inter_field = 1;
+ }
+
+ emms_c();
+}
+
+static int return_frame(AVFilterContext *ctx, int is_second)
+{
+ BWDIFContext *bwdif = ctx->priv;
+ AVFilterLink *link = ctx->outputs[0];
+ int tff, ret;
+
+ if (bwdif->parity == -1) {
+ tff = bwdif->cur->interlaced_frame ?
+ bwdif->cur->top_field_first : 1;
+ } else {
+ tff = bwdif->parity ^ 1;
+ }
+
+ if (is_second) {
+ bwdif->out = ff_get_video_buffer(link, link->w, link->h);
+ if (!bwdif->out)
+ return AVERROR(ENOMEM);
+
+ av_frame_copy_props(bwdif->out, bwdif->cur);
+ bwdif->out->interlaced_frame = 0;
+ if (bwdif->inter_field < 0)
+ bwdif->inter_field = 0;
+ }
+
+ filter(ctx, bwdif->out, tff ^ !is_second, tff);
+
+ if (is_second) {
+ int64_t cur_pts = bwdif->cur->pts;
+ int64_t next_pts = bwdif->next->pts;
+
+ if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
+ bwdif->out->pts = cur_pts + next_pts;
+ } else {
+ bwdif->out->pts = AV_NOPTS_VALUE;
+ }
+ }
+ ret = ff_filter_frame(ctx->outputs[0], bwdif->out);
+
+ bwdif->frame_pending = (bwdif->mode&1) && !is_second;
+ return ret;
+}
+
+static int checkstride(BWDIFContext *bwdif, const AVFrame *a, const AVFrame *b)
+{
+ int i;
+ for (i = 0; i < bwdif->csp->nb_components; i++)
+ if (a->linesize[i] != b->linesize[i])
+ return 1;
+ return 0;
+}
+
+static void fixstride(AVFilterLink *link, AVFrame *f)
+{
+ AVFrame *dst = ff_default_get_video_buffer(link, f->width, f->height);
+ if(!dst)
+ return;
+ av_frame_copy_props(dst, f);
+ av_image_copy(dst->data, dst->linesize,
+ (const uint8_t **)f->data, f->linesize,
+ dst->format, dst->width, dst->height);
+ av_frame_unref(f);
+ av_frame_move_ref(f, dst);
+ av_frame_free(&dst);
+}
+
+static int filter_frame(AVFilterLink *link, AVFrame *frame)
+{
+ AVFilterContext *ctx = link->dst;
+ BWDIFContext *bwdif = ctx->priv;
+
+ av_assert0(frame);
+
+ if (bwdif->frame_pending)
+ return_frame(ctx, 1);
+
+ if (bwdif->prev)
+ av_frame_free(&bwdif->prev);
+ bwdif->prev = bwdif->cur;
+ bwdif->cur = bwdif->next;
+ bwdif->next = frame;
+
+ if (!bwdif->cur) {
+ bwdif->cur = av_frame_clone(bwdif->next);
+ if (!bwdif->cur)
+ return AVERROR(ENOMEM);
+ bwdif->inter_field = 0;
+ }
+
+ if (checkstride(bwdif, bwdif->next, bwdif->cur)) {
+ av_log(ctx, AV_LOG_VERBOSE, "Reallocating frame due to differing stride\n");
+ fixstride(link, bwdif->next);
+ }
+ if (checkstride(bwdif, bwdif->next, bwdif->cur))
+ fixstride(link, bwdif->cur);
+ if (bwdif->prev && checkstride(bwdif, bwdif->next, bwdif->prev))
+ fixstride(link, bwdif->prev);
+ if (checkstride(bwdif, bwdif->next, bwdif->cur) || (bwdif->prev && checkstride(bwdif, bwdif->next, bwdif->prev))) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to reallocate frame\n");
+ return -1;
+ }
+
+ if (!bwdif->prev)
+ return 0;
+
+ if ((bwdif->deint && !bwdif->cur->interlaced_frame) ||
+ ctx->is_disabled ||
+ (bwdif->deint && !bwdif->prev->interlaced_frame && bwdif->prev->repeat_pict) ||
+ (bwdif->deint && !bwdif->next->interlaced_frame && bwdif->next->repeat_pict)
+ ) {
+ bwdif->out = av_frame_clone(bwdif->cur);
+ if (!bwdif->out)
+ return AVERROR(ENOMEM);
+
+ av_frame_free(&bwdif->prev);
+ if (bwdif->out->pts != AV_NOPTS_VALUE)
+ bwdif->out->pts *= 2;
+ return ff_filter_frame(ctx->outputs[0], bwdif->out);
+ }
+
+ bwdif->out = ff_get_video_buffer(ctx->outputs[0], link->w, link->h);
+ if (!bwdif->out)
+ return AVERROR(ENOMEM);
+
+ av_frame_copy_props(bwdif->out, bwdif->cur);
+ bwdif->out->interlaced_frame = 0;
+
+ if (bwdif->out->pts != AV_NOPTS_VALUE)
+ bwdif->out->pts *= 2;
+
+ return return_frame(ctx, 0);
+}
+
+static int request_frame(AVFilterLink *link)
+{
+ AVFilterContext *ctx = link->src;
+ BWDIFContext *bwdif = ctx->priv;
+ int ret;
+
+ if (bwdif->frame_pending) {
+ return_frame(ctx, 1);
+ return 0;
+ }
+
+ if (bwdif->eof)
+ return AVERROR_EOF;
+
+ ret = ff_request_frame(link->src->inputs[0]);
+
+ if (ret == AVERROR_EOF && bwdif->cur) {
+ AVFrame *next = av_frame_clone(bwdif->next);
+
+ if (!next)
+ return AVERROR(ENOMEM);
+
+ bwdif->inter_field = -1;
+ next->pts = bwdif->next->pts * 2 - bwdif->cur->pts;
+
+ filter_frame(link->src->inputs[0], next);
+ bwdif->eof = 1;
+ } else if (ret < 0) {
+ return ret;
+ }
+
+ return 0;
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ BWDIFContext *bwdif = ctx->priv;
+
+ av_frame_free(&bwdif->prev);
+ av_frame_free(&bwdif->cur );
+ av_frame_free(&bwdif->next);
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pix_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_YUVJ411P, AV_PIX_FMT_YUVJ420P,
+ AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
+ 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_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
+ AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
+ AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
+ 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_GBRAP16,
+ AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
+ AV_PIX_FMT_NONE
+ };
+
+ AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
+ if (!fmts_list)
+ return AVERROR(ENOMEM);
+
+ return ff_set_common_formats(ctx, fmts_list);
+}
+
+static int config_props(AVFilterLink *link)
+{
+ AVFilterContext *ctx = link->src;
+ BWDIFContext *s = link->src->priv;
+
+ link->time_base.num = link->src->inputs[0]->time_base.num;
+ link->time_base.den = link->src->inputs[0]->time_base.den * 2;
+ link->w = link->src->inputs[0]->w;
+ link->h = link->src->inputs[0]->h;
+
+ if(s->mode&1)
+ link->frame_rate = av_mul_q(link->src->inputs[0]->frame_rate, (AVRational){2,1});
+
+ if (link->w < 3 || link->h < 3) {
+ av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or lines is not supported\n");
+ return AVERROR(EINVAL);
+ }
+
+ s->csp = av_pix_fmt_desc_get(link->format);
+ if (s->csp->comp[0].depth > 8) {
+ s->filter_intra = filter_intra_16bit;
+ s->filter_line = filter_line_16bit;
+ s->filter_edge = filter_edge_16bit;
+ } else {
+ s->filter_intra = filter_intra;
+ s->filter_line = filter_line;
+ s->filter_edge = filter_edge;
+ }
+
+ return 0;
+}
+
+
+#define OFFSET(x) offsetof(BWDIFContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+#define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit }
+
+static const AVOption bwdif_options[] = {
+ { "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=BWDIF_MODE_SEND_FIELD}, 0, 1, FLAGS, "mode"},
+ CONST("send_frame", "send one frame for each frame", BWDIF_MODE_SEND_FRAME, "mode"),
+ CONST("send_field", "send one frame for each field", BWDIF_MODE_SEND_FIELD, "mode"),
+
+ { "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=BWDIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" },
+ CONST("tff", "assume top field first", BWDIF_PARITY_TFF, "parity"),
+ CONST("bff", "assume bottom field first", BWDIF_PARITY_BFF, "parity"),
+ CONST("auto", "auto detect parity", BWDIF_PARITY_AUTO, "parity"),
+
+ { "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=BWDIF_DEINT_INTERLACED}, 0, 1, FLAGS, "deint" },
+ CONST("all", "deinterlace all frames", BWDIF_DEINT_ALL, "deint"),
+ CONST("interlaced", "only deinterlace frames marked as interlaced", BWDIF_DEINT_INTERLACED, "deint"),
+
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(bwdif);
+
+static const AVFilterPad avfilter_vf_bwdif_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad avfilter_vf_bwdif_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .request_frame = request_frame,
+ .config_props = config_props,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_bwdif = {
+ .name = "bwdif",
+ .description = NULL_IF_CONFIG_SMALL("Deinterlace the input image."),
+ .priv_size = sizeof(BWDIFContext),
+ .priv_class = &bwdif_class,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = avfilter_vf_bwdif_inputs,
+ .outputs = avfilter_vf_bwdif_outputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
+};
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