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FFmpeg/libavfilter/vf_premultiply.c
Nicolas George 5f5dcf44e3 lavfi: rename framesync2 to framesync.
2017-09-12 11:03:51 +02:00

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/*
* Copyright (c) 2016 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/pixdesc.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "framesync.h"
#include "internal.h"
#include "video.h"
typedef struct PreMultiplyContext {
const AVClass *class;
int width[4], height[4];
int linesize[4];
int nb_planes;
int planes;
int inverse;
int inplace;
int half, depth, offset, max;
FFFrameSync fs;
void (*premultiply[4])(const uint8_t *msrc, const uint8_t *asrc,
uint8_t *dst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int shift, int offset);
} PreMultiplyContext;
#define OFFSET(x) offsetof(PreMultiplyContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption options[] = {
{ "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
{ "inplace","enable inplace mode", OFFSET(inplace), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ NULL }
};
#define premultiply_options options
AVFILTER_DEFINE_CLASS(premultiply);
static int query_formats(AVFilterContext *ctx)
{
PreMultiplyContext *s = ctx->priv;
static const enum AVPixelFormat no_alpha_pix_fmts[] = {
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14,
AV_PIX_FMT_YUV444P16,
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_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY16,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat alpha_pix_fmts[] = {
AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_GBRAP,
AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
AV_PIX_FMT_NONE
};
return ff_set_common_formats(ctx, ff_make_format_list(s->inplace ? alpha_pix_fmts : no_alpha_pix_fmts));
}
static void premultiply8(const uint8_t *msrc, const uint8_t *asrc,
uint8_t *dst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int shift, int offset)
{
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[x] = ((msrc[x] * (((asrc[x] >> 1) & 1) + asrc[x])) + 128) >> 8;
}
dst += dlinesize;
msrc += mlinesize;
asrc += alinesize;
}
}
static void premultiply8yuv(const uint8_t *msrc, const uint8_t *asrc,
uint8_t *dst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int shift, int offset)
{
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[x] = ((((msrc[x] - 128) * (((asrc[x] >> 1) & 1) + asrc[x]))) >> 8) + 128;
}
dst += dlinesize;
msrc += mlinesize;
asrc += alinesize;
}
}
static void premultiply8offset(const uint8_t *msrc, const uint8_t *asrc,
uint8_t *dst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int shift, int offset)
{
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[x] = ((((msrc[x] - offset) * (((asrc[x] >> 1) & 1) + asrc[x])) + 128) >> 8) + offset;
}
dst += dlinesize;
msrc += mlinesize;
asrc += alinesize;
}
}
static void premultiply16(const uint8_t *mmsrc, const uint8_t *aasrc,
uint8_t *ddst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int shift, int offset)
{
const uint16_t *msrc = (const uint16_t *)mmsrc;
const uint16_t *asrc = (const uint16_t *)aasrc;
uint16_t *dst = (uint16_t *)ddst;
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[x] = ((msrc[x] * (((asrc[x] >> 1) & 1) + asrc[x])) + half) >> shift;
}
dst += dlinesize / 2;
msrc += mlinesize / 2;
asrc += alinesize / 2;
}
}
static void premultiply16yuv(const uint8_t *mmsrc, const uint8_t *aasrc,
uint8_t *ddst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int shift, int offset)
{
const uint16_t *msrc = (const uint16_t *)mmsrc;
const uint16_t *asrc = (const uint16_t *)aasrc;
uint16_t *dst = (uint16_t *)ddst;
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[x] = ((((msrc[x] - half) * (((asrc[x] >> 1) & 1) + asrc[x]))) >> shift) + half;
}
dst += dlinesize / 2;
msrc += mlinesize / 2;
asrc += alinesize / 2;
}
}
static void premultiply16offset(const uint8_t *mmsrc, const uint8_t *aasrc,
uint8_t *ddst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int shift, int offset)
{
const uint16_t *msrc = (const uint16_t *)mmsrc;
const uint16_t *asrc = (const uint16_t *)aasrc;
uint16_t *dst = (uint16_t *)ddst;
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[x] = ((((msrc[x] - offset) * (((asrc[x] >> 1) & 1) + asrc[x])) + half) >> shift) + offset;
}
dst += dlinesize / 2;
msrc += mlinesize / 2;
asrc += alinesize / 2;
}
}
static void unpremultiply8(const uint8_t *msrc, const uint8_t *asrc,
uint8_t *dst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int max, int offset)
{
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if (asrc[x] > 0 && asrc[x] < 255)
dst[x] = FFMIN(msrc[x] * 255 / asrc[x], 255);
else
dst[x] = msrc[x];
}
dst += dlinesize;
msrc += mlinesize;
asrc += alinesize;
}
}
static void unpremultiply8yuv(const uint8_t *msrc, const uint8_t *asrc,
uint8_t *dst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int max, int offset)
{
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if (asrc[x] > 0 && asrc[x] < 255)
dst[x] = FFMIN((msrc[x] - 128) * 255 / asrc[x] + 128, 255);
else
dst[x] = msrc[x];
}
dst += dlinesize;
msrc += mlinesize;
asrc += alinesize;
}
}
static void unpremultiply8offset(const uint8_t *msrc, const uint8_t *asrc,
uint8_t *dst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int max, int offset)
{
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if (asrc[x] > 0 && asrc[x] < 255)
dst[x] = FFMIN((msrc[x] - offset) * 255 / asrc[x] + offset, 255);
else
dst[x] = msrc[x];
}
dst += dlinesize;
msrc += mlinesize;
asrc += alinesize;
}
}
static void unpremultiply16(const uint8_t *mmsrc, const uint8_t *aasrc,
uint8_t *ddst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int max, int offset)
{
const uint16_t *msrc = (const uint16_t *)mmsrc;
const uint16_t *asrc = (const uint16_t *)aasrc;
uint16_t *dst = (uint16_t *)ddst;
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if (asrc[x] > 0 && asrc[x] < max)
dst[x] = FFMIN(msrc[x] * (unsigned)max / asrc[x], max);
else
dst[x] = msrc[x];
}
dst += dlinesize / 2;
msrc += mlinesize / 2;
asrc += alinesize / 2;
}
}
static void unpremultiply16yuv(const uint8_t *mmsrc, const uint8_t *aasrc,
uint8_t *ddst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int max, int offset)
{
const uint16_t *msrc = (const uint16_t *)mmsrc;
const uint16_t *asrc = (const uint16_t *)aasrc;
uint16_t *dst = (uint16_t *)ddst;
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if (asrc[x] > 0 && asrc[x] < max)
dst[x] = FFMAX(FFMIN((msrc[x] - half) * max / asrc[x], half - 1), -half) + half;
else
dst[x] = msrc[x];
}
dst += dlinesize / 2;
msrc += mlinesize / 2;
asrc += alinesize / 2;
}
}
static void unpremultiply16offset(const uint8_t *mmsrc, const uint8_t *aasrc,
uint8_t *ddst,
ptrdiff_t mlinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h,
int half, int max, int offset)
{
const uint16_t *msrc = (const uint16_t *)mmsrc;
const uint16_t *asrc = (const uint16_t *)aasrc;
uint16_t *dst = (uint16_t *)ddst;
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if (asrc[x] > 0 && asrc[x] < max)
dst[x] = FFMAX(FFMIN((msrc[x] - offset) * (unsigned)max / asrc[x] + offset, max), 0);
else
dst[x] = msrc[x];
}
dst += dlinesize / 2;
msrc += mlinesize / 2;
asrc += alinesize / 2;
}
}
static int filter_frame(AVFilterContext *ctx,
AVFrame **out, AVFrame *base, AVFrame *alpha)
{
PreMultiplyContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
if (ctx->is_disabled) {
*out = av_frame_clone(base);
if (!*out)
return AVERROR(ENOMEM);
} else {
int p, full, limited;
*out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!*out)
return AVERROR(ENOMEM);
av_frame_copy_props(*out, base);
full = base->color_range == AVCOL_RANGE_JPEG;
limited = base->color_range == AVCOL_RANGE_MPEG;
if (s->inverse) {
switch (outlink->format) {
case AV_PIX_FMT_YUV444P:
case AV_PIX_FMT_YUVA444P:
s->premultiply[0] = full ? unpremultiply8 : unpremultiply8offset;
s->premultiply[1] = s->premultiply[2] = unpremultiply8yuv;
break;
case AV_PIX_FMT_YUVJ444P:
s->premultiply[0] = unpremultiply8;
s->premultiply[1] = s->premultiply[2] = unpremultiply8yuv;
break;
case AV_PIX_FMT_GBRP:
case AV_PIX_FMT_GBRAP:
s->premultiply[0] = s->premultiply[1] = s->premultiply[2] = limited ? unpremultiply8offset : unpremultiply8;
break;
case AV_PIX_FMT_YUV444P9:
case AV_PIX_FMT_YUVA444P9:
case AV_PIX_FMT_YUV444P10:
case AV_PIX_FMT_YUVA444P10:
case AV_PIX_FMT_YUV444P12:
case AV_PIX_FMT_YUV444P14:
case AV_PIX_FMT_YUV444P16:
case AV_PIX_FMT_YUVA444P16:
s->premultiply[0] = full ? unpremultiply16 : unpremultiply16offset;
s->premultiply[1] = s->premultiply[2] = unpremultiply16yuv;
break;
case AV_PIX_FMT_GBRP9:
case AV_PIX_FMT_GBRP10:
case AV_PIX_FMT_GBRAP10:
case AV_PIX_FMT_GBRP12:
case AV_PIX_FMT_GBRAP12:
case AV_PIX_FMT_GBRP14:
case AV_PIX_FMT_GBRP16:
case AV_PIX_FMT_GBRAP16:
s->premultiply[0] = s->premultiply[1] = s->premultiply[2] = limited ? unpremultiply16offset : unpremultiply16;
break;
case AV_PIX_FMT_GRAY8:
s->premultiply[0] = limited ? unpremultiply8offset : unpremultiply8;
break;
case AV_PIX_FMT_GRAY9:
case AV_PIX_FMT_GRAY10:
case AV_PIX_FMT_GRAY12:
case AV_PIX_FMT_GRAY16:
s->premultiply[0] = limited ? unpremultiply16offset : unpremultiply16;
break;
}
} else {
switch (outlink->format) {
case AV_PIX_FMT_YUV444P:
case AV_PIX_FMT_YUVA444P:
s->premultiply[0] = full ? premultiply8 : premultiply8offset;
s->premultiply[1] = s->premultiply[2] = premultiply8yuv;
break;
case AV_PIX_FMT_YUVJ444P:
s->premultiply[0] = premultiply8;
s->premultiply[1] = s->premultiply[2] = premultiply8yuv;
break;
case AV_PIX_FMT_GBRP:
case AV_PIX_FMT_GBRAP:
s->premultiply[0] = s->premultiply[1] = s->premultiply[2] = limited ? premultiply8offset : premultiply8;
break;
case AV_PIX_FMT_YUV444P9:
case AV_PIX_FMT_YUVA444P9:
case AV_PIX_FMT_YUV444P10:
case AV_PIX_FMT_YUVA444P10:
case AV_PIX_FMT_YUV444P12:
case AV_PIX_FMT_YUV444P14:
case AV_PIX_FMT_YUV444P16:
case AV_PIX_FMT_YUVA444P16:
s->premultiply[0] = full ? premultiply16 : premultiply16offset;
s->premultiply[1] = s->premultiply[2] = premultiply16yuv;
break;
case AV_PIX_FMT_GBRP9:
case AV_PIX_FMT_GBRP10:
case AV_PIX_FMT_GBRAP10:
case AV_PIX_FMT_GBRP12:
case AV_PIX_FMT_GBRAP12:
case AV_PIX_FMT_GBRP14:
case AV_PIX_FMT_GBRP16:
case AV_PIX_FMT_GBRAP16:
s->premultiply[0] = s->premultiply[1] = s->premultiply[2] = limited ? premultiply16offset : premultiply16;
break;
case AV_PIX_FMT_GRAY8:
s->premultiply[0] = limited ? premultiply8offset : premultiply8;
break;
case AV_PIX_FMT_GRAY9:
case AV_PIX_FMT_GRAY10:
case AV_PIX_FMT_GRAY12:
case AV_PIX_FMT_GRAY16:
s->premultiply[0] = limited ? premultiply16offset : premultiply16;
break;
}
}
for (p = 0; p < s->nb_planes; p++) {
if (!((1 << p) & s->planes) || p == 3) {
av_image_copy_plane((*out)->data[p], (*out)->linesize[p], base->data[p], base->linesize[p],
s->linesize[p], s->height[p]);
continue;
}
s->premultiply[p](base->data[p], s->inplace ? alpha->data[3] : alpha->data[0],
(*out)->data[p],
base->linesize[p], s->inplace ? alpha->linesize[3] : alpha->linesize[0],
(*out)->linesize[p],
s->width[p], s->height[p],
s->half, s->inverse ? s->max : s->depth, s->offset);
}
}
return 0;
}
static int process_frame(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
PreMultiplyContext *s = fs->opaque;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out = NULL, *base, *alpha;
int ret;
if ((ret = ff_framesync_get_frame(&s->fs, 0, &base, 0)) < 0 ||
(ret = ff_framesync_get_frame(&s->fs, 1, &alpha, 0)) < 0)
return ret;
if ((ret = filter_frame(ctx, &out, base, alpha)) < 0)
return ret;
out->pts = av_rescale_q(base->pts, s->fs.time_base, outlink->time_base);
return ff_filter_frame(outlink, out);
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
PreMultiplyContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int vsub, hsub, ret;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
return ret;
hsub = desc->log2_chroma_w;
vsub = desc->log2_chroma_h;
s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
s->height[0] = s->height[3] = inlink->h;
s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
s->width[0] = s->width[3] = inlink->w;
s->depth = desc->comp[0].depth;
s->max = (1 << s->depth) - 1;
s->half = (1 << s->depth) / 2;
s->offset = 16 << (s->depth - 8);
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
PreMultiplyContext *s = ctx->priv;
AVFilterLink *base = ctx->inputs[0];
AVFilterLink *alpha;
FFFrameSyncIn *in;
int ret;
if (!s->inplace) {
alpha = ctx->inputs[1];
if (base->format != alpha->format) {
av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
return AVERROR(EINVAL);
}
if (base->w != alpha->w ||
base->h != alpha->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 (%dx%d) ",
ctx->input_pads[0].name, base->w, base->h,
ctx->input_pads[1].name, alpha->w, alpha->h);
return AVERROR(EINVAL);
}
}
outlink->w = base->w;
outlink->h = base->h;
outlink->time_base = base->time_base;
outlink->sample_aspect_ratio = base->sample_aspect_ratio;
outlink->frame_rate = base->frame_rate;
if (s->inplace)
return 0;
if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
return ret;
in = s->fs.in;
in[0].time_base = base->time_base;
in[1].time_base = alpha->time_base;
in[0].sync = 1;
in[0].before = EXT_STOP;
in[0].after = EXT_INFINITY;
in[1].sync = 1;
in[1].before = EXT_STOP;
in[1].after = EXT_INFINITY;
s->fs.opaque = s;
s->fs.on_event = process_frame;
return ff_framesync_configure(&s->fs);
}
static int activate(AVFilterContext *ctx)
{
PreMultiplyContext *s = ctx->priv;
if (s->inplace) {
AVFrame *frame = NULL;
AVFrame *out = NULL;
int ret, status;
int64_t pts;
if ((ret = ff_inlink_consume_frame(ctx->inputs[0], &frame)) > 0) {
if ((ret = filter_frame(ctx, &out, frame, frame)) < 0)
return ret;
av_frame_free(&frame);
ret = ff_filter_frame(ctx->outputs[0], out);
}
if (ret < 0) {
return ret;
} else if (ff_inlink_acknowledge_status(ctx->inputs[0], &status, &pts)) {
ff_outlink_set_status(ctx->outputs[0], status, pts);
return 0;
} else {
if (ff_outlink_frame_wanted(ctx->outputs[0]))
ff_inlink_request_frame(ctx->inputs[0]);
return 0;
}
} else {
return ff_framesync_activate(&s->fs);
}
}
static av_cold int init(AVFilterContext *ctx)
{
PreMultiplyContext *s = ctx->priv;
AVFilterPad pad = { 0 };
int ret;
if (!strcmp(ctx->filter->name, "unpremultiply"))
s->inverse = 1;
pad.type = AVMEDIA_TYPE_VIDEO;
pad.name = av_strdup("main");
pad.config_props = config_input;
if (!pad.name)
return AVERROR(ENOMEM);
if ((ret = ff_insert_inpad(ctx, 0, &pad)) < 0) {
av_freep(&pad.name);
return ret;
}
if (!s->inplace) {
pad.type = AVMEDIA_TYPE_VIDEO;
pad.name = av_strdup("alpha");
pad.config_props = NULL;
if (!pad.name)
return AVERROR(ENOMEM);
if ((ret = ff_insert_inpad(ctx, 1, &pad)) < 0) {
av_freep(&pad.name);
return ret;
}
}
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
PreMultiplyContext *s = ctx->priv;
if (!s->inplace)
ff_framesync_uninit(&s->fs);
}
static const AVFilterPad premultiply_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};
#if CONFIG_PREMULTIPLY_FILTER
AVFilter ff_vf_premultiply = {
.name = "premultiply",
.description = NULL_IF_CONFIG_SMALL("PreMultiply first stream with first plane of second stream."),
.priv_size = sizeof(PreMultiplyContext),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.activate = activate,
.inputs = NULL,
.outputs = premultiply_outputs,
.priv_class = &premultiply_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_DYNAMIC_INPUTS,
};
#endif /* CONFIG_PREMULTIPLY_FILTER */
#if CONFIG_UNPREMULTIPLY_FILTER
#define unpremultiply_options options
AVFILTER_DEFINE_CLASS(unpremultiply);
AVFilter ff_vf_unpremultiply = {
.name = "unpremultiply",
.description = NULL_IF_CONFIG_SMALL("UnPreMultiply first stream with first plane of second stream."),
.priv_size = sizeof(PreMultiplyContext),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.activate = activate,
.inputs = NULL,
.outputs = premultiply_outputs,
.priv_class = &unpremultiply_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_DYNAMIC_INPUTS,
};
#endif /* CONFIG_UNPREMULTIPLY_FILTER */
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