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avfilter: add xfade filter

tags/n4.3
Paul B Mahol 6 years ago
parent
6087692a60
commit
863accbefa
6 changed files with 1019 additions and 1 deletions
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  1. +1
    -0
      Changelog
  2. +80
    -0
      doc/filters.texi
  3. +1
    -0
      libavfilter/Makefile
  4. +1
    -0
      libavfilter/allfilters.c
  5. +1
    -1
      libavfilter/version.h
  6. +935
    -0
      libavfilter/vf_xfade.c

+ 1
- 0
Changelog View File

@@ -32,6 +32,7 @@ version <next>:
- freezeframes filter
- Argonaut Games ADPCM decoder
- Argonaut Games ASF demuxer
- xfade video filter


version 4.2:


+ 80
- 0
doc/filters.texi View File

@@ -20033,6 +20033,86 @@ If number of inputs is even number, than result will be mean value between two m
Set which planes to filter. Default value is @code{15}, by which all planes are processed.
@end table

@section xfade

Apply cross fade from one input video stream to another input video stream.
The cross fade is applied for specified duration.

The filter accepts the following options:

@table @option
@item transition
Set one of available transition effects:

@table @samp
@item custom
@item fade
@item wipeleft
@item wiperight
@item wipeup
@item wipedown
@item slideleft
@item slideright
@item slideup
@item slidedown
@item circlecrop
@item rectcrop
@item distance
@item fadeblack
@item fadewhite
@end table
Default transition effect is fade.

@item duration
Set cross fade duration in seconds.
Default duration is 1 second.

@item offset
Set cross fade start relative to first input stream.
Default offset it 0.

@item expr
Set expression for custom transition effect.

The expressions can use the following variables and functions:

@table @option
@item X
@item Y
The coordinates of the current sample.

@item W
@item H
The width and height of the image.

@item P
Progress of transition effect.

@item PLANE
Currently processed plane.

@item A
Return value of first input at current location and plane.

@item B
Return value of second input at current location and plane.

@item a0(x, y)
@item a1(x, y)
@item a2(x, y)
@item a3(x, y)
Return the value of the pixel at location (@var{x},@var{y}) of the
first/second/third/fourth component of first input.

@item b0(x, y)
@item b1(x, y)
@item b2(x, y)
@item b3(x, y)
Return the value of the pixel at location (@var{x},@var{y}) of the
first/second/third/fourth component of second input.
@end table
@end table

@section xstack
Stack video inputs into custom layout.



+ 1
- 0
libavfilter/Makefile View File

@@ -441,6 +441,7 @@ OBJS-$(CONFIG_W3FDIF_FILTER) += vf_w3fdif.o
OBJS-$(CONFIG_WAVEFORM_FILTER) += vf_waveform.o
OBJS-$(CONFIG_WEAVE_FILTER) += vf_weave.o
OBJS-$(CONFIG_XBR_FILTER) += vf_xbr.o
OBJS-$(CONFIG_XFADE_FILTER) += vf_xfade.o
OBJS-$(CONFIG_XMEDIAN_FILTER) += vf_xmedian.o framesync.o
OBJS-$(CONFIG_XSTACK_FILTER) += vf_stack.o framesync.o
OBJS-$(CONFIG_YADIF_FILTER) += vf_yadif.o yadif_common.o


+ 1
- 0
libavfilter/allfilters.c View File

@@ -420,6 +420,7 @@ extern AVFilter ff_vf_w3fdif;
extern AVFilter ff_vf_waveform;
extern AVFilter ff_vf_weave;
extern AVFilter ff_vf_xbr;
extern AVFilter ff_vf_xfade;
extern AVFilter ff_vf_xmedian;
extern AVFilter ff_vf_xstack;
extern AVFilter ff_vf_yadif;


+ 1
- 1
libavfilter/version.h View File

@@ -30,7 +30,7 @@
#include "libavutil/version.h"

#define LIBAVFILTER_VERSION_MAJOR 7
#define LIBAVFILTER_VERSION_MINOR 71
#define LIBAVFILTER_VERSION_MINOR 72
#define LIBAVFILTER_VERSION_MICRO 100




+ 935
- 0
libavfilter/vf_xfade.c View File

@@ -0,0 +1,935 @@
/*
* Copyright (c) 2020 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/eval.h"
#include "libavutil/opt.h"
#include "libavutil/pixfmt.h"
#include "avfilter.h"
#include "formats.h"
#include "framesync.h"
#include "internal.h"
#include "filters.h"
#include "video.h"

enum XFadeTransitions {
CUSTOM = -1,
FADE,
WIPELEFT,
WIPERIGHT,
WIPEUP,
WIPEDOWN,
SLIDELEFT,
SLIDERIGHT,
SLIDEUP,
SLIDEDOWN,
CIRCLECROP,
RECTCROP,
DISTANCE,
FADEBLACK,
FADEWHITE,
NB_TRANSITIONS,
};

typedef struct XFadeContext {
const AVClass *class;

int transition;
int64_t duration;
int64_t offset;
char *custom_str;

int nb_planes;
int depth;

int64_t duration_pts;
int64_t offset_pts;
int64_t first_pts;
int64_t last_pts;
int64_t pts;
int xfade_is_over;
int need_second;
int eof[2];
AVFrame *xf[2];
int max_value;
uint16_t black[4];
uint16_t white[4];

void (*transitionf)(AVFilterContext *ctx, const AVFrame *a, const AVFrame *b, AVFrame *out, float progress,
int slice_start, int slice_end, int jobnr);

AVExpr *e;
} XFadeContext;

static const char *const var_names[] = { "X", "Y", "W", "H", "A", "B", "PLANE", "P", NULL };
enum { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_A, VAR_B, VAR_PLANE, VAR_PROGRESS, VAR_VARS_NB };

typedef struct ThreadData {
const AVFrame *xf[2];
AVFrame *out;
float progress;
} ThreadData;

static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUV444P,
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,
AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_GBRP9,
AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GRAY10,
AV_PIX_FMT_YUV444P12,
AV_PIX_FMT_YUVA444P12,
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GRAY12,
AV_PIX_FMT_YUV444P14, AV_PIX_FMT_GBRP14,
AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16, 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 av_cold void uninit(AVFilterContext *ctx)
{
XFadeContext *s = ctx->priv;

av_expr_free(s->e);
}

#define OFFSET(x) offsetof(XFadeContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)

static const AVOption xfade_options[] = {
{ "transition", "set cross fade transition", OFFSET(transition), AV_OPT_TYPE_INT, {.i64=FADE}, -1, NB_TRANSITIONS-1, FLAGS, "transition" },
{ "custom", "custom transition", 0, AV_OPT_TYPE_CONST, {.i64=CUSTOM}, 0, 0, FLAGS, "transition" },
{ "fade", "fade transition", 0, AV_OPT_TYPE_CONST, {.i64=FADE}, 0, 0, FLAGS, "transition" },
{ "wipeleft", "wipe left transition", 0, AV_OPT_TYPE_CONST, {.i64=WIPELEFT}, 0, 0, FLAGS, "transition" },
{ "wiperight", "wipe right transition", 0, AV_OPT_TYPE_CONST, {.i64=WIPERIGHT}, 0, 0, FLAGS, "transition" },
{ "wipeup", "wipe up transition", 0, AV_OPT_TYPE_CONST, {.i64=WIPEUP}, 0, 0, FLAGS, "transition" },
{ "wipedown", "wipe down transition", 0, AV_OPT_TYPE_CONST, {.i64=WIPEDOWN}, 0, 0, FLAGS, "transition" },
{ "slideleft", "slide left transition", 0, AV_OPT_TYPE_CONST, {.i64=SLIDELEFT}, 0, 0, FLAGS, "transition" },
{ "slideright", "slide right transition", 0, AV_OPT_TYPE_CONST, {.i64=SLIDERIGHT}, 0, 0, FLAGS, "transition" },
{ "slideup", "slide up transition", 0, AV_OPT_TYPE_CONST, {.i64=SLIDEUP}, 0, 0, FLAGS, "transition" },
{ "slidedown", "slide down transition", 0, AV_OPT_TYPE_CONST, {.i64=SLIDEDOWN}, 0, 0, FLAGS, "transition" },
{ "circlecrop", "circle crop transition", 0, AV_OPT_TYPE_CONST, {.i64=CIRCLECROP}, 0, 0, FLAGS, "transition" },
{ "rectcrop", "rect crop transition", 0, AV_OPT_TYPE_CONST, {.i64=RECTCROP}, 0, 0, FLAGS, "transition" },
{ "distance", "distance transition", 0, AV_OPT_TYPE_CONST, {.i64=DISTANCE}, 0, 0, FLAGS, "transition" },
{ "fadeblack", "fadeblack transition", 0, AV_OPT_TYPE_CONST, {.i64=FADEBLACK}, 0, 0, FLAGS, "transition" },
{ "fadewhite", "fadewhite transition", 0, AV_OPT_TYPE_CONST, {.i64=FADEWHITE}, 0, 0, FLAGS, "transition" },
{ "duration", "set cross fade duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=1000000}, 0, 60000000, FLAGS },
{ "offset", "set cross fade start relative to first input stream", OFFSET(offset), AV_OPT_TYPE_DURATION, {.i64=0}, INT64_MIN, INT64_MAX, FLAGS },
{ "expr", "set expression for custom transition", OFFSET(custom_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
{ NULL }
};

AVFILTER_DEFINE_CLASS(xfade);

#define CUSTOM_TRANSITION(name, type, div) \
static void custom##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int height = slice_end - slice_start; \
\
double values[VAR_VARS_NB]; \
values[VAR_W] = out->width; \
values[VAR_H] = out->height; \
values[VAR_PROGRESS] = progress; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
values[VAR_PLANE] = p; \
\
for (int y = 0; y < height; y++) { \
values[VAR_Y] = slice_start + y; \
for (int x = 0; x < out->width; x++) { \
values[VAR_X] = x; \
values[VAR_A] = xf0[x]; \
values[VAR_B] = xf1[x]; \
dst[x] = av_expr_eval(s->e, values, s); \
} \
\
dst += out->linesize[p] / div; \
xf0 += a->linesize[p] / div; \
xf1 += b->linesize[p] / div; \
} \
} \
}

CUSTOM_TRANSITION(8, uint8_t, 1)
CUSTOM_TRANSITION(16, uint16_t, 2)

static inline float mix(float a, float b, float mix)
{
return a * mix + b * (1.f - mix);
}

static inline float smoothstep(float edge0, float edge1, float x)
{
float t;

t = av_clipf((x - edge0) / (edge1 - edge0), 0.f, 1.f);

return t * t * (3.f - 2.f * t);
}

#define FADE_TRANSITION(name, type, div) \
static void fade##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int height = slice_end - slice_start; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
for (int y = 0; y < height; y++) { \
for (int x = 0; x < out->width; x++) { \
dst[x] = mix(xf0[x], xf1[x], progress); \
} \
\
dst += out->linesize[p] / div; \
xf0 += a->linesize[p] / div; \
xf1 += b->linesize[p] / div; \
} \
} \
}

FADE_TRANSITION(8, uint8_t, 1)
FADE_TRANSITION(16, uint16_t, 2)

#define WIPELEFT_TRANSITION(name, type, div) \
static void wipeleft##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int height = slice_end - slice_start; \
const int z = out->width * progress; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
for (int y = 0; y < height; y++) { \
for (int x = 0; x < out->width; x++) { \
dst[x] = x > z ? xf1[x] : xf0[x]; \
} \
\
dst += out->linesize[p] / div; \
xf0 += a->linesize[p] / div; \
xf1 += b->linesize[p] / div; \
} \
} \
}

WIPELEFT_TRANSITION(8, uint8_t, 1)
WIPELEFT_TRANSITION(16, uint16_t, 2)

#define WIPERIGHT_TRANSITION(name, type, div) \
static void wiperight##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int height = slice_end - slice_start; \
const int z = out->width * (1.f - progress); \
\
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
for (int y = 0; y < height; y++) { \
for (int x = 0; x < out->width; x++) { \
dst[x] = x > z ? xf0[x] : xf1[x]; \
} \
\
dst += out->linesize[p] / div; \
xf0 += a->linesize[p] / div; \
xf1 += b->linesize[p] / div; \
} \
} \
}

WIPERIGHT_TRANSITION(8, uint8_t, 1)
WIPERIGHT_TRANSITION(16, uint16_t, 2)

#define WIPEUP_TRANSITION(name, type, div) \
static void wipeup##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int height = slice_end - slice_start; \
const int z = out->height * progress; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
for (int y = 0; y < height; y++) { \
for (int x = 0; x < out->width; x++) { \
dst[x] = slice_start + y > z ? xf1[x] : xf0[x]; \
} \
\
dst += out->linesize[p] / div; \
xf0 += a->linesize[p] / div; \
xf1 += b->linesize[p] / div; \
} \
} \
}

WIPEUP_TRANSITION(8, uint8_t, 1)
WIPEUP_TRANSITION(16, uint16_t, 2)

#define WIPEDOWN_TRANSITION(name, type, div) \
static void wipedown##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int height = slice_end - slice_start; \
const int z = out->height * (1.f - progress); \
\
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
for (int y = 0; y < height; y++) { \
for (int x = 0; x < out->width; x++) { \
dst[x] = slice_start + y > z ? xf0[x] : xf1[x]; \
} \
\
dst += out->linesize[p] / div; \
xf0 += a->linesize[p] / div; \
xf1 += b->linesize[p] / div; \
} \
} \
}

WIPEDOWN_TRANSITION(8, uint8_t, 1)
WIPEDOWN_TRANSITION(16, uint16_t, 2)

#define SLIDELEFT_TRANSITION(name, type, div) \
static void slideleft##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int height = slice_end - slice_start; \
const int width = out->width; \
const int z = -progress * width; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
for (int y = 0; y < height; y++) { \
for (int x = 0; x < width; x++) { \
const int zx = z + x; \
const int zz = zx % width + width * (zx < 0); \
dst[x] = (zx > 0) && (zx < width) ? xf1[zz] : xf0[zz]; \
} \
\
dst += out->linesize[p] / div; \
xf0 += a->linesize[p] / div; \
xf1 += b->linesize[p] / div; \
} \
} \
}

SLIDELEFT_TRANSITION(8, uint8_t, 1)
SLIDELEFT_TRANSITION(16, uint16_t, 2)

#define SLIDERIGHT_TRANSITION(name, type, div) \
static void slideright##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int height = slice_end - slice_start; \
const int width = out->width; \
const int z = progress * width; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
for (int y = 0; y < height; y++) { \
for (int x = 0; x < out->width; x++) { \
const int zx = z + x; \
const int zz = zx % width + width * (zx < 0); \
dst[x] = (zx > 0) && (zx < width) ? xf1[zz] : xf0[zz]; \
} \
\
dst += out->linesize[p] / div; \
xf0 += a->linesize[p] / div; \
xf1 += b->linesize[p] / div; \
} \
} \
}

SLIDERIGHT_TRANSITION(8, uint8_t, 1)
SLIDERIGHT_TRANSITION(16, uint16_t, 2)

#define SLIDEUP_TRANSITION(name, type, div) \
static void slideup##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int height = out->height; \
const int z = -progress * height; \
\
for (int p = 0; p < s->nb_planes; p++) { \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
for (int y = slice_start; y < slice_end; y++) { \
const int zy = z + y; \
const int zz = zy % height + height * (zy < 0); \
const type *xf0 = (const type *)(a->data[p] + zz * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + zz * b->linesize[p]); \
\
for (int x = 0; x < out->width; x++) { \
dst[x] = (zy > 0) && (zy < height) ? xf1[x] : xf0[x]; \
} \
\
dst += out->linesize[p] / div; \
} \
} \
}

SLIDEUP_TRANSITION(8, uint8_t, 1)
SLIDEUP_TRANSITION(16, uint16_t, 2)

#define SLIDEDOWN_TRANSITION(name, type, div) \
static void slidedown##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int height = out->height; \
const int z = progress * height; \
\
for (int p = 0; p < s->nb_planes; p++) { \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
for (int y = slice_start; y < slice_end; y++) { \
const int zy = z + y; \
const int zz = zy % height + height * (zy < 0); \
const type *xf0 = (const type *)(a->data[p] + zz * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + zz * b->linesize[p]); \
\
for (int x = 0; x < out->width; x++) { \
dst[x] = (zy > 0) && (zy < height) ? xf1[x] : xf0[x]; \
} \
\
dst += out->linesize[p] / div; \
} \
} \
}

SLIDEDOWN_TRANSITION(8, uint8_t, 1)
SLIDEDOWN_TRANSITION(16, uint16_t, 2)

#define CIRCLECROP_TRANSITION(name, type, div) \
static void circlecrop##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int width = out->width; \
const int height = out->height; \
float z = powf(2.f * fabsf(progress - 0.5f), 3.f) * hypotf(width/2, height/2); \
\
for (int p = 0; p < s->nb_planes; p++) { \
const int bg = s->black[p]; \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
for (int y = slice_start; y < slice_end; y++) { \
const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]); \
\
for (int x = 0; x < width; x++) { \
float dist = hypotf(x - width / 2, y - height / 2); \
int val = progress < 0.5f ? xf1[x] : xf0[x]; \
dst[x] = (z < dist) ? bg : val; \
} \
\
dst += out->linesize[p] / div; \
} \
} \
}

CIRCLECROP_TRANSITION(8, uint8_t, 1)
CIRCLECROP_TRANSITION(16, uint16_t, 2)

#define RECTCROP_TRANSITION(name, type, div) \
static void rectcrop##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int width = out->width; \
const int height = out->height; \
int zh = fabsf(progress - 0.5f) * height; \
int zw = fabsf(progress - 0.5f) * width; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const int bg = s->black[p]; \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
for (int y = slice_start; y < slice_end; y++) { \
const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]); \
\
for (int x = 0; x < width; x++) { \
int dist = FFABS(x - width / 2) < zw && \
FFABS(y - height / 2) < zh; \
int val = progress < 0.5f ? xf1[x] : xf0[x]; \
dst[x] = !dist ? bg : val; \
} \
\
dst += out->linesize[p] / div; \
} \
} \
}

RECTCROP_TRANSITION(8, uint8_t, 1)
RECTCROP_TRANSITION(16, uint16_t, 2)

#define DISTANCE_TRANSITION(name, type, div) \
static void distance##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int width = out->width; \
const float max = s->max_value; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < width; x++) { \
float dist = 0.f; \
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]); \
\
dist += (xf0[x] / max - xf1[x] / max) * \
(xf0[x] / max - xf1[x] / max); \
} \
\
dist = sqrtf(dist) <= progress; \
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]); \
type *dst = (type *)(out->data[p] + y * out->linesize[p]); \
dst[x] = mix(mix(xf0[x], xf1[x], dist), xf1[x], progress); \
} \
} \
} \
}

DISTANCE_TRANSITION(8, uint8_t, 1)
DISTANCE_TRANSITION(16, uint16_t, 2)

#define FADEBLACK_TRANSITION(name, type, div) \
static void fadeblack##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int height = slice_end - slice_start; \
const float phase = 0.2f; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
const int bg = s->black[p]; \
\
for (int y = 0; y < height; y++) { \
for (int x = 0; x < out->width; x++) { \
dst[x] = mix(mix(xf0[x], bg, smoothstep(1.f-phase, 1.f, progress)), \
mix(bg, xf1[x], smoothstep(phase, 1.f, progress)), \
progress); \
} \
\
dst += out->linesize[p] / div; \
xf0 += a->linesize[p] / div; \
xf1 += b->linesize[p] / div; \
} \
} \
}

FADEBLACK_TRANSITION(8, uint8_t, 1)
FADEBLACK_TRANSITION(16, uint16_t, 2)

#define FADEWHITE_TRANSITION(name, type, div) \
static void fadewhite##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int height = slice_end - slice_start; \
const float phase = 0.2f; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
const int bg = s->white[p]; \
\
for (int y = 0; y < height; y++) { \
for (int x = 0; x < out->width; x++) { \
dst[x] = mix(mix(xf0[x], bg, smoothstep(1.f-phase, 1.f, progress)), \
mix(bg, xf1[x], smoothstep(phase, 1.f, progress)), \
progress); \
} \
\
dst += out->linesize[p] / div; \
xf0 += a->linesize[p] / div; \
xf1 += b->linesize[p] / div; \
} \
} \
}

FADEWHITE_TRANSITION(8, uint8_t, 1)
FADEWHITE_TRANSITION(16, uint16_t, 2)

static inline double getpix(void *priv, double x, double y, int plane, int nb)
{
XFadeContext *s = priv;
AVFrame *in = s->xf[nb];
const uint8_t *src = in->data[FFMIN(plane, s->nb_planes - 1)];
int linesize = in->linesize[FFMIN(plane, s->nb_planes - 1)];
const int w = in->width;
const int h = in->height;

int xi, yi;

xi = av_clipd(x, 0, w - 1);
yi = av_clipd(y, 0, h - 1);

if (s->depth > 8) {
const uint16_t *src16 = (const uint16_t*)src;

linesize /= 2;
return src16[xi + yi * linesize];
} else {
return src[xi + yi * linesize];
}
}

static double a0(void *priv, double x, double y) { return getpix(priv, x, y, 0, 0); }
static double a1(void *priv, double x, double y) { return getpix(priv, x, y, 1, 0); }
static double a2(void *priv, double x, double y) { return getpix(priv, x, y, 2, 0); }
static double a3(void *priv, double x, double y) { return getpix(priv, x, y, 3, 0); }

static double b0(void *priv, double x, double y) { return getpix(priv, x, y, 0, 1); }
static double b1(void *priv, double x, double y) { return getpix(priv, x, y, 1, 1); }
static double b2(void *priv, double x, double y) { return getpix(priv, x, y, 2, 1); }
static double b3(void *priv, double x, double y) { return getpix(priv, x, y, 3, 1); }

static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink0 = ctx->inputs[0];
AVFilterLink *inlink1 = ctx->inputs[1];
XFadeContext *s = ctx->priv;
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink0->format);
int is_rgb;

if (inlink0->format != inlink1->format) {
av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
return AVERROR(EINVAL);
}
if (inlink0->w != inlink1->w || inlink0->h != inlink1->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, inlink0->w, inlink0->h,
ctx->input_pads[1].name, inlink1->w, inlink1->h);
return AVERROR(EINVAL);
}

if (inlink0->time_base.num != inlink1->time_base.num ||
inlink0->time_base.den != inlink1->time_base.den) {
av_log(ctx, AV_LOG_ERROR, "First input link %s timebase "
"(%d/%d) do not match the corresponding "
"second input link %s timebase (%d/%d)\n",
ctx->input_pads[0].name, inlink0->time_base.num, inlink0->time_base.den,
ctx->input_pads[1].name, inlink1->time_base.num, inlink1->time_base.den);
return AVERROR(EINVAL);
}

outlink->w = inlink0->w;
outlink->h = inlink0->h;
outlink->time_base = inlink0->time_base;
outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
outlink->frame_rate = inlink0->frame_rate;

s->depth = pix_desc->comp[0].depth;
is_rgb = !!(pix_desc->flags & AV_PIX_FMT_FLAG_RGB);
s->nb_planes = av_pix_fmt_count_planes(inlink0->format);
s->max_value = (1 << s->depth) - 1;
s->black[0] = 0;
s->black[1] = s->black[2] = is_rgb ? 0 : s->max_value / 2;
s->black[3] = s->max_value;
s->white[0] = s->white[3] = s->max_value;
s->white[1] = s->white[2] = is_rgb ? s->max_value : s->max_value / 2;

s->first_pts = s->last_pts = s->pts = AV_NOPTS_VALUE;

if (s->duration)
s->duration_pts = av_rescale_q(s->duration, AV_TIME_BASE_Q, outlink->time_base);
if (s->offset)
s->offset_pts = av_rescale_q(s->offset, AV_TIME_BASE_Q, outlink->time_base);

switch (s->transition) {
case CUSTOM: s->transitionf = s->depth <= 8 ? custom8_transition : custom16_transition; break;
case FADE: s->transitionf = s->depth <= 8 ? fade8_transition : fade16_transition; break;
case WIPELEFT: s->transitionf = s->depth <= 8 ? wipeleft8_transition : wipeleft16_transition; break;
case WIPERIGHT: s->transitionf = s->depth <= 8 ? wiperight8_transition : wiperight16_transition; break;
case WIPEUP: s->transitionf = s->depth <= 8 ? wipeup8_transition : wipeup16_transition; break;
case WIPEDOWN: s->transitionf = s->depth <= 8 ? wipedown8_transition : wipedown16_transition; break;
case SLIDELEFT: s->transitionf = s->depth <= 8 ? slideleft8_transition : slideleft16_transition; break;
case SLIDERIGHT: s->transitionf = s->depth <= 8 ? slideright8_transition : slideright16_transition; break;
case SLIDEUP: s->transitionf = s->depth <= 8 ? slideup8_transition : slideup16_transition; break;
case SLIDEDOWN: s->transitionf = s->depth <= 8 ? slidedown8_transition : slidedown16_transition; break;
case CIRCLECROP: s->transitionf = s->depth <= 8 ? circlecrop8_transition : circlecrop16_transition; break;
case RECTCROP: s->transitionf = s->depth <= 8 ? rectcrop8_transition : rectcrop16_transition; break;
case DISTANCE: s->transitionf = s->depth <= 8 ? distance8_transition : distance16_transition; break;
case FADEBLACK: s->transitionf = s->depth <= 8 ? fadeblack8_transition : fadeblack16_transition; break;
case FADEWHITE: s->transitionf = s->depth <= 8 ? fadewhite8_transition : fadewhite16_transition; break;
}

if (s->transition == CUSTOM) {
static const char *const func2_names[] = {
"a0", "a1", "a2", "a3",
"b0", "b1", "b2", "b3",
NULL
};
double (*func2[])(void *, double, double) = {
a0, a1, a2, a3,
b0, b1, b2, b3,
NULL };
int ret;

if (!s->custom_str)
return AVERROR(EINVAL);
ret = av_expr_parse(&s->e, s->custom_str, var_names,
NULL, NULL, func2_names, func2, 0, ctx);
if (ret < 0)
return ret;
}

return 0;
}

static int xfade_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
XFadeContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
ThreadData *td = arg;
int slice_start = (outlink->h * jobnr ) / nb_jobs;
int slice_end = (outlink->h * (jobnr+1)) / nb_jobs;

s->transitionf(ctx, td->xf[0], td->xf[1], td->out, td->progress, slice_start, slice_end, jobnr);

return 0;
}

static int xfade_frame(AVFilterContext *ctx, AVFrame *a, AVFrame *b)
{
XFadeContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
float progress = av_clipf(1.f - ((float)(s->pts - s->first_pts - s->offset_pts) / s->duration_pts), 0.f, 1.f);
ThreadData td;
AVFrame *out;

out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
return AVERROR(ENOMEM);

td.xf[0] = a, td.xf[1] = b, td.out = out, td.progress = progress;
ctx->internal->execute(ctx, xfade_slice, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));

out->pts = s->pts;

return ff_filter_frame(outlink, out);
}

static int xfade_activate(AVFilterContext *ctx)
{
XFadeContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *in = NULL;
int ret = 0, status;
int64_t pts;

FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, ctx);

if (s->xfade_is_over) {
ret = ff_inlink_consume_frame(ctx->inputs[1], &in);
if (ret < 0) {
return ret;
} else if (ff_inlink_acknowledge_status(ctx->inputs[1], &status, &pts)) {
ff_outlink_set_status(outlink, status, s->pts);
return 0;
} else if (!ret) {
if (ff_outlink_frame_wanted(outlink)) {
ff_inlink_request_frame(ctx->inputs[1]);
return 0;
}
} else {
in->pts = (in->pts - s->last_pts) + s->pts;
return ff_filter_frame(outlink, in);
}
}

if (ff_inlink_queued_frames(ctx->inputs[0]) > 0) {
s->xf[0] = ff_inlink_peek_frame(ctx->inputs[0], 0);
if (s->xf[0]) {
if (s->first_pts == AV_NOPTS_VALUE) {
s->first_pts = s->xf[0]->pts;
}
s->pts = s->xf[0]->pts;
if (s->first_pts + s->offset_pts > s->xf[0]->pts) {
s->xf[0] = NULL;
s->need_second = 0;
ff_inlink_consume_frame(ctx->inputs[0], &in);
return ff_filter_frame(outlink, in);
}

s->need_second = 1;
}
}

if (s->xf[0] && ff_inlink_queued_frames(ctx->inputs[1]) > 0) {
ff_inlink_consume_frame(ctx->inputs[0], &s->xf[0]);
ff_inlink_consume_frame(ctx->inputs[1], &s->xf[1]);

s->last_pts = s->xf[1]->pts;
s->pts = s->xf[0]->pts;
if (s->xf[0]->pts - (s->first_pts + s->offset_pts) > s->duration_pts)
s->xfade_is_over = 1;
ret = xfade_frame(ctx, s->xf[0], s->xf[1]);
av_frame_free(&s->xf[0]);
av_frame_free(&s->xf[1]);
return ret;
}

if (ff_inlink_queued_frames(ctx->inputs[0]) > 0 &&
ff_inlink_queued_frames(ctx->inputs[1]) > 0) {
ff_filter_set_ready(ctx, 100);
return 0;
}

if (ff_outlink_frame_wanted(outlink)) {
if (!s->eof[0] && ff_outlink_get_status(ctx->inputs[0])) {
s->eof[0] = 1;
s->xfade_is_over = 1;
}
if (!s->eof[1] && ff_outlink_get_status(ctx->inputs[1])) {
s->eof[1] = 1;
}
if (!s->eof[0] && !s->xf[0])
ff_inlink_request_frame(ctx->inputs[0]);
if (!s->eof[1] && (s->need_second || s->eof[0]))
ff_inlink_request_frame(ctx->inputs[1]);
if (s->eof[0] && s->eof[1] && (
ff_inlink_queued_frames(ctx->inputs[0]) <= 0 ||
ff_inlink_queued_frames(ctx->inputs[1]) <= 0))
ff_outlink_set_status(outlink, AVERROR_EOF, AV_NOPTS_VALUE);
return 0;
}

return FFERROR_NOT_READY;
}

static const AVFilterPad xfade_inputs[] = {
{
.name = "main",
.type = AVMEDIA_TYPE_VIDEO,
},
{
.name = "xfade",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};

static const AVFilterPad xfade_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};

AVFilter ff_vf_xfade = {
.name = "xfade",
.description = NULL_IF_CONFIG_SMALL("Cross fade one video with another video."),
.priv_size = sizeof(XFadeContext),
.priv_class = &xfade_class,
.query_formats = query_formats,
.activate = xfade_activate,
.uninit = uninit,
.inputs = xfade_inputs,
.outputs = xfade_outputs,
.flags = AVFILTER_FLAG_SLICE_THREADS,
};

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