@@ -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:

@@ -4256,6 +4256,59 @@ tblend=all_mode=difference128

 @end example

 @end itemize

+@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:

+

+@table @option

+@item mode

+The interlacing mode to adopt. It accepts one of the following values:

+

+@table @option

+@item 0, send_frame

+Output one frame for each frame.

+@item 1, send_field

+Output one frame for each field.

+@end table

+

+The default value is @code{send_field}.

+

+@item parity

+The picture field parity assumed for the input interlaced video. It accepts one

+of the following values:

+

+@table @option

+@item 0, tff

+Assume the top field is first.

+@item 1, bff

+Assume the bottom field is first.

+@item -1, auto

+Enable automatic detection of field parity.

+@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.

+

+@item deint

+Specify which frames to deinterlace. Accept one of the following

+values:

+

+@table @option

+@item 0, all

+Deinterlace all frames.

+@item 1, interlaced

+Only deinterlace frames marked as interlaced.

+@end table

+

+The default value is @code{all}.

+@end table

+

 @section boxblur

 Apply a boxblur algorithm to the input video.

@@ -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

@@ -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);

@@ -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, \

new file mode 100644

@@ -0,0 +1,625 @@

+/*

+ * BobWeaver Deinterlacing Filter

+ * Copyright (C) 2016 Thomas Mundt <loudmax@yahoo.de>

+ *

+ * Based on YADIF (Yet Another Deinterlacing Filter)

+ * Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at>

+ *               2010      James Darnley <james.darnley@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,

+};