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FFmpeg/libavfilter/vf_premultiply.c
Andreas Rheinhardt b4f5201967 avfilter: Replace query_formats callback with union of list and callback 
If one looks at the many query_formats callbacks in existence,
one will immediately recognize that there is one type of default
callback for video and a slightly different default callback for
audio: It is "return ff_set_common_formats_from_list(ctx, pix_fmts);"
for video with a filter-specific pix_fmts list. For audio, it is
the same with a filter-specific sample_fmts list together with
ff_set_common_all_samplerates() and ff_set_common_all_channel_counts().

This commit allows to remove the boilerplate query_formats callbacks
by replacing said callback with a union consisting the old callback
and pointers for pixel and sample format arrays. For the not uncommon
case in which these lists only contain a single entry (besides the
sentinel) enum AVPixelFormat and enum AVSampleFormat fields are also
added to the union to store them directly in the AVFilter,
thereby avoiding a relocation.

The state of said union will be contained in a new, dedicated AVFilter
field (the nb_inputs and nb_outputs fields have been shrunk to uint8_t
in order to create a hole for this new field; this is no problem, as
the maximum of all the nb_inputs is four; for nb_outputs it is only
two).

The state's default value coincides with the earlier default of
query_formats being unset, namely that the filter accepts all formats
(and also sample rates and channel counts/layouts for audio)
provided that these properties agree coincide for all inputs and
outputs.

By using different union members for audio and video filters
the type-unsafety of using the same functions for audio and video
lists will furthermore be more confined to formats.c than before.

When the new fields are used, they will also avoid allocations:
Currently something nearly equivalent to ff_default_query_formats()
is called after every successful call to a query_formats callback;
yet in the common case that the newly allocated AVFilterFormats
are not used at all (namely if there are no free links) these newly
allocated AVFilterFormats are freed again without ever being used.
Filters no longer using the callback will not exhibit this any more.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-10-05 17:48:25 +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 ThreadData {
AVFrame *m, *a, *d;
} ThreadData;
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 }
};
AVFILTER_DEFINE_CLASS_EXT(premultiply, "(un)premultiply", options);
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_GBRPF32,
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, 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_YUVA444P12, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_GBRAP,
AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GBRAPF32,
AV_PIX_FMT_NONE
};
return ff_set_common_formats_from_list(ctx, 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) * (int64_t)(((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) * (int64_t)(((asrc[x] >> 1) & 1) + asrc[x])) + half) >> shift) + offset;
}
dst += dlinesize / 2;
msrc += mlinesize / 2;
asrc += alinesize / 2;
}
}
static void premultiplyf32(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 float *msrc = (const float *)mmsrc;
const float *asrc = (const float *)aasrc;
float *dst = (float *)ddst;
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[x] = msrc[x] * asrc[x];
}
dst += dlinesize / 4;
msrc += mlinesize / 4;
asrc += alinesize / 4;
}
}
static void premultiplyf32offset(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 float *msrc = (const float *)mmsrc;
const float *asrc = (const float *)aasrc;
float *dst = (float *)ddst;
int x, y;
float offsetf = offset / 65535.0f;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[x] = ((msrc[x] - offsetf) * asrc[x]) + offsetf;
}
dst += dlinesize / 4;
msrc += mlinesize / 4;
asrc += alinesize / 4;
}
}
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(FFMAX(msrc[x] - offset, 0) * 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(FFMAX(msrc[x] - offset, 0) * (unsigned)max / asrc[x] + offset, max), 0);
else
dst[x] = msrc[x];
}
dst += dlinesize / 2;
msrc += mlinesize / 2;
asrc += alinesize / 2;
}
}
static void unpremultiplyf32(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 float *msrc = (const float *)mmsrc;
const float *asrc = (const float *)aasrc;
float *dst = (float *)ddst;
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if (asrc[x] > 0.0f)
dst[x] = msrc[x] / asrc[x];
else
dst[x] = msrc[x];
}
dst += dlinesize / 4;
msrc += mlinesize / 4;
asrc += alinesize / 4;
}
}
static void unpremultiplyf32offset(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 float *msrc = (const float *)mmsrc;
const float *asrc = (const float *)aasrc;
float *dst = (float *)ddst;
int x, y;
float offsetf = offset / 65535.0f;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if (asrc[x] > 0.0f)
dst[x] = (msrc[x] - offsetf) / asrc[x] + offsetf;
else
dst[x] = msrc[x];
}
dst += dlinesize / 4;
msrc += mlinesize / 4;
asrc += alinesize / 4;
}
}
static int premultiply_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
PreMultiplyContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *out = td->d;
AVFrame *alpha = td->a;
AVFrame *base = td->m;
int p;
for (p = 0; p < s->nb_planes; p++) {
const int slice_start = (s->height[p] * jobnr) / nb_jobs;
const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
if (!((1 << p) & s->planes) || p == 3) {
av_image_copy_plane(out->data[p] + slice_start * out->linesize[p],
out->linesize[p],
base->data[p] + slice_start * base->linesize[p],
base->linesize[p],
s->linesize[p], slice_end - slice_start);
continue;
}
s->premultiply[p](base->data[p] + slice_start * base->linesize[p],
s->inplace ? alpha->data[3] + slice_start * alpha->linesize[3] :
alpha->data[0] + slice_start * alpha->linesize[0],
out->data[p] + slice_start * out->linesize[p],
base->linesize[p], s->inplace ? alpha->linesize[3] : alpha->linesize[0],
out->linesize[p],
s->width[p], slice_end - slice_start,
s->half, s->inverse ? s->max : s->depth, s->offset);
}
return 0;
}
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 {
ThreadData td;
int 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_YUVA444P12:
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_GBRPF32:
case AV_PIX_FMT_GBRAPF32:
s->premultiply[0] = s->premultiply[1] = s->premultiply[2] = limited ? unpremultiplyf32offset : unpremultiplyf32;
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_GRAY14:
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_YUVA444P12:
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_GBRPF32:
case AV_PIX_FMT_GBRAPF32:
s->premultiply[0] = s->premultiply[1] = s->premultiply[2] = limited ? premultiplyf32offset: premultiplyf32;
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_GRAY14:
case AV_PIX_FMT_GRAY16:
s->premultiply[0] = limited ? premultiply16offset : premultiply16;
break;
}
}
td.d = *out;
td.a = alpha;
td.m = base;
ff_filter_execute(ctx, premultiply_slice, &td, NULL,
FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
}
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->flags & AV_PIX_FMT_FLAG_FLOAT ? 16 : 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->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;
FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
if ((ret = ff_inlink_consume_frame(ctx->inputs[0], &frame)) > 0) {
ret = filter_frame(ctx, &out, frame, frame);
av_frame_free(&frame);
if (ret < 0)
return ret;
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 = "main";
pad.config_props = config_input;
if ((ret = ff_append_inpad(ctx, &pad)) < 0)
return ret;
if (!s->inplace) {
pad.type = AVMEDIA_TYPE_VIDEO;
pad.name = "alpha";
pad.config_props = NULL;
if ((ret = ff_append_inpad(ctx, &pad)) < 0)
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,
},
};
#if CONFIG_PREMULTIPLY_FILTER
const 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,
.activate = activate,
.inputs = NULL,
FILTER_OUTPUTS(premultiply_outputs),
FILTER_QUERY_FUNC(query_formats),
.priv_class = &premultiply_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_DYNAMIC_INPUTS |
AVFILTER_FLAG_SLICE_THREADS,
};
#endif /* CONFIG_PREMULTIPLY_FILTER */
#if CONFIG_UNPREMULTIPLY_FILTER
const AVFilter ff_vf_unpremultiply = {
.name = "unpremultiply",
.description = NULL_IF_CONFIG_SMALL("UnPreMultiply first stream with first plane of second stream."),
.priv_class = &premultiply_class,
.priv_size = sizeof(PreMultiplyContext),
.init = init,
.uninit = uninit,
.activate = activate,
.inputs = NULL,
FILTER_OUTPUTS(premultiply_outputs),
FILTER_QUERY_FUNC(query_formats),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_DYNAMIC_INPUTS |
AVFILTER_FLAG_SLICE_THREADS,
};
#endif /* CONFIG_UNPREMULTIPLY_FILTER */
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