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FFmpeg/libavfilter/vf_blend.c
Ganesh Ajjanagadde 8507b98c10 avfilter,swresample,swscale: use fabs, fabsf instead of FFABS 
It is well known that fabs and fabsf are at least as fast and sometimes
faster than the FFABS macro, at least on the gcc+glibc combination.
For instance, see the reference:
http://patchwork.sourceware.org/patch/6735/.
This was a patch to glibc in order to remove their usages of a macro.

The reason essentially boils down to fabs using the __builtin_fabs of
the compiler, while FFABS needs to infer to not use a branch and to
simply change the sign bit. Usually the inference works, but sometimes
it does not. This may be easily checked by looking at the asm.

This also has the added benefit of reducing macro usage, which has
problems with side-effects.

Note that avcodec is not handled here, as it is huge and
most things there are integer arithmetic anyway.

Tested with FATE.

Reviewed-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
2015-10-22 16:13:26 -04:00

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/*
* Copyright (c) 2013 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 "bufferqueue.h"
#include "formats.h"
#include "internal.h"
#include "dualinput.h"
#include "video.h"
#include "blend.h"
#define TOP 0
#define BOTTOM 1
typedef struct BlendContext {
const AVClass *class;
FFDualInputContext dinput;
int hsub, vsub; ///< chroma subsampling values
int nb_planes;
char *all_expr;
enum BlendMode all_mode;
double all_opacity;
FilterParams params[4];
int tblend;
AVFrame *prev_frame; /* only used with tblend */
} BlendContext;
static const char *const var_names[] = { "X", "Y", "W", "H", "SW", "SH", "T", "N", "A", "B", "TOP", "BOTTOM", NULL };
enum { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_SW, VAR_SH, VAR_T, VAR_N, VAR_A, VAR_B, VAR_TOP, VAR_BOTTOM, VAR_VARS_NB };
typedef struct ThreadData {
const AVFrame *top, *bottom;
AVFrame *dst;
AVFilterLink *inlink;
int plane;
int w, h;
FilterParams *param;
} ThreadData;
#define COMMON_OPTIONS \
{ "c0_mode", "set component #0 blend mode", OFFSET(params[0].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
{ "c1_mode", "set component #1 blend mode", OFFSET(params[1].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
{ "c2_mode", "set component #2 blend mode", OFFSET(params[2].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
{ "c3_mode", "set component #3 blend mode", OFFSET(params[3].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
{ "all_mode", "set blend mode for all components", OFFSET(all_mode), AV_OPT_TYPE_INT, {.i64=-1},-1, BLEND_NB-1, FLAGS, "mode"},\
{ "addition", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION}, 0, 0, FLAGS, "mode" },\
{ "addition128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION128}, 0, 0, FLAGS, "mode" },\
{ "and", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AND}, 0, 0, FLAGS, "mode" },\
{ "average", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AVERAGE}, 0, 0, FLAGS, "mode" },\
{ "burn", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BURN}, 0, 0, FLAGS, "mode" },\
{ "darken", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DARKEN}, 0, 0, FLAGS, "mode" },\
{ "difference", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE}, 0, 0, FLAGS, "mode" },\
{ "difference128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE128}, 0, 0, FLAGS, "mode" },\
{ "divide", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIVIDE}, 0, 0, FLAGS, "mode" },\
{ "dodge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DODGE}, 0, 0, FLAGS, "mode" },\
{ "exclusion", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXCLUSION}, 0, 0, FLAGS, "mode" },\
{ "glow", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GLOW}, 0, 0, FLAGS, "mode" },\
{ "hardlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT}, 0, 0, FLAGS, "mode" },\
{ "hardmix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDMIX}, 0, 0, FLAGS, "mode" },\
{ "lighten", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN}, 0, 0, FLAGS, "mode" },\
{ "linearlight","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LINEARLIGHT},0, 0, FLAGS, "mode" },\
{ "multiply", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY}, 0, 0, FLAGS, "mode" },\
{ "negation", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION}, 0, 0, FLAGS, "mode" },\
{ "normal", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NORMAL}, 0, 0, FLAGS, "mode" },\
{ "or", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OR}, 0, 0, FLAGS, "mode" },\
{ "overlay", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OVERLAY}, 0, 0, FLAGS, "mode" },\
{ "phoenix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PHOENIX}, 0, 0, FLAGS, "mode" },\
{ "pinlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PINLIGHT}, 0, 0, FLAGS, "mode" },\
{ "reflect", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_REFLECT}, 0, 0, FLAGS, "mode" },\
{ "screen", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN}, 0, 0, FLAGS, "mode" },\
{ "softlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTLIGHT}, 0, 0, FLAGS, "mode" },\
{ "subtract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SUBTRACT}, 0, 0, FLAGS, "mode" },\
{ "vividlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_VIVIDLIGHT}, 0, 0, FLAGS, "mode" },\
{ "xor", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_XOR}, 0, 0, FLAGS, "mode" },\
{ "c0_expr", "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
{ "c1_expr", "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
{ "c2_expr", "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
{ "c3_expr", "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
{ "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
{ "c0_opacity", "set color component #0 opacity", OFFSET(params[0].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
{ "c1_opacity", "set color component #1 opacity", OFFSET(params[1].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
{ "c2_opacity", "set color component #2 opacity", OFFSET(params[2].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
{ "c3_opacity", "set color component #3 opacity", OFFSET(params[3].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
{ "all_opacity", "set opacity for all color components", OFFSET(all_opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS}
#define OFFSET(x) offsetof(BlendContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption blend_options[] = {
COMMON_OPTIONS,
{ "shortest", "force termination when the shortest input terminates", OFFSET(dinput.shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ "repeatlast", "repeat last bottom frame", OFFSET(dinput.repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(blend);
static void blend_normal(const uint8_t *top, ptrdiff_t top_linesize,
const uint8_t *bottom, ptrdiff_t bottom_linesize,
uint8_t *dst, ptrdiff_t dst_linesize,
ptrdiff_t width, ptrdiff_t start, ptrdiff_t end,
FilterParams *param, double *values)
{
av_image_copy_plane(dst, dst_linesize, top, top_linesize, width, end - start);
}
static void blend_normal_8bit(const uint8_t *top, ptrdiff_t top_linesize,
const uint8_t *bottom, ptrdiff_t bottom_linesize,
uint8_t *dst, ptrdiff_t dst_linesize,
ptrdiff_t width, ptrdiff_t start, ptrdiff_t end,
FilterParams *param, double *values)
{
const double opacity = param->opacity;
int i, j;
for (i = start; i < end; i++) {
for (j = 0; j < width; j++) {
dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
}
dst += dst_linesize;
top += top_linesize;
bottom += bottom_linesize;
}
}
static void blend_normal_16bit(const uint8_t *_top, ptrdiff_t top_linesize,
const uint8_t *_bottom, ptrdiff_t bottom_linesize,
uint8_t *_dst, ptrdiff_t dst_linesize,
ptrdiff_t width, ptrdiff_t start, ptrdiff_t end,
FilterParams *param, double *values)
{
const uint16_t *top = (uint16_t*)_top;
const uint16_t *bottom = (uint16_t*)_bottom;
uint16_t *dst = (uint16_t*)_dst;
const double opacity = param->opacity;
int i, j;
dst_linesize /= 2;
top_linesize /= 2;
bottom_linesize /= 2;
for (i = start; i < end; i++) {
for (j = 0; j < width; j++) {
dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
}
dst += dst_linesize;
top += top_linesize;
bottom += bottom_linesize;
}
}
#define DEFINE_BLEND8(name, expr) \
static void blend_## name##_8bit(const uint8_t *top, ptrdiff_t top_linesize, \
const uint8_t *bottom, ptrdiff_t bottom_linesize, \
uint8_t *dst, ptrdiff_t dst_linesize, \
ptrdiff_t width, ptrdiff_t start, ptrdiff_t end, \
FilterParams *param, double *values) \
{ \
double opacity = param->opacity; \
int i, j; \
\
for (i = start; i < end; i++) { \
for (j = 0; j < width; j++) { \
dst[j] = top[j] + ((expr) - top[j]) * opacity; \
} \
dst += dst_linesize; \
top += top_linesize; \
bottom += bottom_linesize; \
} \
}
#define DEFINE_BLEND16(name, expr) \
static void blend_## name##_16bit(const uint8_t *_top, ptrdiff_t top_linesize, \
const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
uint8_t *_dst, ptrdiff_t dst_linesize, \
ptrdiff_t width, ptrdiff_t start, ptrdiff_t end, \
FilterParams *param, double *values) \
{ \
const uint16_t *top = (uint16_t*)_top; \
const uint16_t *bottom = (uint16_t*)_bottom; \
uint16_t *dst = (uint16_t*)_dst; \
double opacity = param->opacity; \
int i, j; \
dst_linesize /= 2; \
top_linesize /= 2; \
bottom_linesize /= 2; \
\
for (i = start; i < end; i++) { \
for (j = 0; j < width; j++) { \
dst[j] = top[j] + ((expr) - top[j]) * opacity; \
} \
dst += dst_linesize; \
top += top_linesize; \
bottom += bottom_linesize; \
} \
}
#define A top[j]
#define B bottom[j]
#define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 255))
#define SCREEN(x, a, b) (255 - (x) * ((255 - (a)) * (255 - (b)) / 255))
#define BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 255 - ((255 - (b)) << 8) / (a)))
#define DODGE(a, b) (((a) == 255) ? (a) : FFMIN(255, (((b) << 8) / (255 - (a)))))
DEFINE_BLEND8(addition, FFMIN(255, A + B))
DEFINE_BLEND8(addition128, av_clip_uint8(A + B - 128))
DEFINE_BLEND8(average, (A + B) / 2)
DEFINE_BLEND8(subtract, FFMAX(0, A - B))
DEFINE_BLEND8(multiply, MULTIPLY(1, A, B))
DEFINE_BLEND8(negation, 255 - FFABS(255 - A - B))
DEFINE_BLEND8(difference, FFABS(A - B))
DEFINE_BLEND8(difference128, av_clip_uint8(128 + A - B))
DEFINE_BLEND8(screen, SCREEN(1, A, B))
DEFINE_BLEND8(overlay, (A < 128) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
DEFINE_BLEND8(hardlight, (B < 128) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
DEFINE_BLEND8(hardmix, (A < (255 - B)) ? 0: 255)
DEFINE_BLEND8(darken, FFMIN(A, B))
DEFINE_BLEND8(lighten, FFMAX(A, B))
DEFINE_BLEND8(divide, av_clip_uint8(((float)A / ((float)B) * 255)))
DEFINE_BLEND8(dodge, DODGE(A, B))
DEFINE_BLEND8(burn, BURN(A, B))
DEFINE_BLEND8(softlight, (A > 127) ? B + (255 - B) * (A - 127.5) / 127.5 * (0.5 - fabs(B - 127.5) / 255): B - B * ((127.5 - A) / 127.5) * (0.5 - fabs(B - 127.5)/255))
DEFINE_BLEND8(exclusion, A + B - 2 * A * B / 255)
DEFINE_BLEND8(pinlight, (B < 128) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 128)))
DEFINE_BLEND8(phoenix, FFMIN(A, B) - FFMAX(A, B) + 255)
DEFINE_BLEND8(reflect, (B == 255) ? B : FFMIN(255, (A * A / (255 - B))))
DEFINE_BLEND8(glow, (A == 255) ? A : FFMIN(255, (B * B / (255 - A))))
DEFINE_BLEND8(and, A & B)
DEFINE_BLEND8(or, A | B)
DEFINE_BLEND8(xor, A ^ B)
DEFINE_BLEND8(vividlight, (A < 128) ? BURN(2 * A, B) : DODGE(2 * (A - 128), B))
DEFINE_BLEND8(linearlight,av_clip_uint8((B < 128) ? B + 2 * A - 255 : B + 2 * (A - 128)))
#undef MULTIPLY
#undef SCREEN
#undef BURN
#undef DODGE
#define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 65535))
#define SCREEN(x, a, b) (65535 - (x) * ((65535 - (a)) * (65535 - (b)) / 65535))
#define BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 65535 - ((65535 - (b)) << 16) / (a)))
#define DODGE(a, b) (((a) == 65535) ? (a) : FFMIN(65535, (((b) << 16) / (65535 - (a)))))
DEFINE_BLEND16(addition, FFMIN(65535, A + B))
DEFINE_BLEND16(addition128, av_clip_uint16(A + B - 32768))
DEFINE_BLEND16(average, (A + B) / 2)
DEFINE_BLEND16(subtract, FFMAX(0, A - B))
DEFINE_BLEND16(multiply, MULTIPLY(1, A, B))
DEFINE_BLEND16(negation, 65535 - FFABS(65535 - A - B))
DEFINE_BLEND16(difference, FFABS(A - B))
DEFINE_BLEND16(difference128, av_clip_uint16(32768 + A - B))
DEFINE_BLEND16(screen, SCREEN(1, A, B))
DEFINE_BLEND16(overlay, (A < 32768) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
DEFINE_BLEND16(hardlight, (B < 32768) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
DEFINE_BLEND16(hardmix, (A < (65535 - B)) ? 0: 65535)
DEFINE_BLEND16(darken, FFMIN(A, B))
DEFINE_BLEND16(lighten, FFMAX(A, B))
DEFINE_BLEND16(divide, av_clip_uint16(((float)A / ((float)B) * 65535)))
DEFINE_BLEND16(dodge, DODGE(A, B))
DEFINE_BLEND16(burn, BURN(A, B))
DEFINE_BLEND16(softlight, (A > 32767) ? B + (65535 - B) * (A - 32767.5) / 32767.5 * (0.5 - fabs(B - 32767.5) / 65535): B - B * ((32767.5 - A) / 32767.5) * (0.5 - fabs(B - 32767.5)/65535))
DEFINE_BLEND16(exclusion, A + B - 2 * A * B / 65535)
DEFINE_BLEND16(pinlight, (B < 32768) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 32768)))
DEFINE_BLEND16(phoenix, FFMIN(A, B) - FFMAX(A, B) + 65535)
DEFINE_BLEND16(reflect, (B == 65535) ? B : FFMIN(65535, (A * A / (65535 - B))))
DEFINE_BLEND16(glow, (A == 65535) ? A : FFMIN(65535, (B * B / (65535 - A))))
DEFINE_BLEND16(and, A & B)
DEFINE_BLEND16(or, A | B)
DEFINE_BLEND16(xor, A ^ B)
DEFINE_BLEND16(vividlight, (A < 32768) ? BURN(2 * A, B) : DODGE(2 * (A - 32768), B))
DEFINE_BLEND16(linearlight,av_clip_uint16((B < 32768) ? B + 2 * A - 65535 : B + 2 * (A - 32768)))
#define DEFINE_BLEND_EXPR(type, name, div) \
static void blend_expr_## name(const uint8_t *_top, ptrdiff_t top_linesize, \
const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
uint8_t *_dst, ptrdiff_t dst_linesize, \
ptrdiff_t width, ptrdiff_t start, ptrdiff_t end, \
FilterParams *param, double *values) \
{ \
const type *top = (type*)_top; \
const type *bottom = (type*)_bottom; \
type *dst = (type*)_dst; \
AVExpr *e = param->e; \
int y, x; \
dst_linesize /= div; \
top_linesize /= div; \
bottom_linesize /= div; \
\
for (y = start; y < end; y++) { \
values[VAR_Y] = y; \
for (x = 0; x < width; x++) { \
values[VAR_X] = x; \
values[VAR_TOP] = values[VAR_A] = top[x]; \
values[VAR_BOTTOM] = values[VAR_B] = bottom[x]; \
dst[x] = av_expr_eval(e, values, NULL); \
} \
dst += dst_linesize; \
top += top_linesize; \
bottom += bottom_linesize; \
} \
}
DEFINE_BLEND_EXPR(uint8_t, 8bit, 1)
DEFINE_BLEND_EXPR(uint16_t, 16bit, 2)
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
ThreadData *td = arg;
int slice_start = (td->h * jobnr ) / nb_jobs;
int slice_end = (td->h * (jobnr+1)) / nb_jobs;
const uint8_t *top = td->top->data[td->plane];
const uint8_t *bottom = td->bottom->data[td->plane];
uint8_t *dst = td->dst->data[td->plane];
double values[VAR_VARS_NB];
values[VAR_N] = td->inlink->frame_count;
values[VAR_T] = td->dst->pts == AV_NOPTS_VALUE ? NAN : td->dst->pts * av_q2d(td->inlink->time_base);
values[VAR_W] = td->w;
values[VAR_H] = td->h;
values[VAR_SW] = td->w / (double)td->dst->width;
values[VAR_SH] = td->h / (double)td->dst->height;
td->param->blend(top + slice_start * td->top->linesize[td->plane],
td->top->linesize[td->plane],
bottom + slice_start * td->bottom->linesize[td->plane],
td->bottom->linesize[td->plane],
dst + slice_start * td->dst->linesize[td->plane],
td->dst->linesize[td->plane],
td->w, slice_start, slice_end, td->param, &values[0]);
return 0;
}
static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,
const AVFrame *bottom_buf)
{
BlendContext *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *dst_buf;
int plane;
dst_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!dst_buf)
return top_buf;
av_frame_copy_props(dst_buf, top_buf);
for (plane = 0; plane < s->nb_planes; plane++) {
int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
int outw = FF_CEIL_RSHIFT(dst_buf->width, hsub);
int outh = FF_CEIL_RSHIFT(dst_buf->height, vsub);
FilterParams *param = &s->params[plane];
ThreadData td = { .top = top_buf, .bottom = bottom_buf, .dst = dst_buf,
.w = outw, .h = outh, .param = param, .plane = plane,
.inlink = inlink };
ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outh, ctx->graph->nb_threads));
}
if (!s->tblend)
av_frame_free(&top_buf);
return dst_buf;
}
static av_cold int init(AVFilterContext *ctx)
{
BlendContext *s = ctx->priv;
s->tblend = !strcmp(ctx->filter->name, "tblend");
s->dinput.process = blend_frame;
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_GBRP16, 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)
{
BlendContext *s = ctx->priv;
int i;
ff_dualinput_uninit(&s->dinput);
av_frame_free(&s->prev_frame);
for (i = 0; i < FF_ARRAY_ELEMS(s->params); i++)
av_expr_free(s->params[i].e);
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *toplink = ctx->inputs[TOP];
BlendContext *s = ctx->priv;
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
int ret, plane, is_16bit;
if (!s->tblend) {
AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
if (toplink->format != bottomlink->format) {
av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
return AVERROR(EINVAL);
}
if (toplink->w != bottomlink->w ||
toplink->h != bottomlink->h ||
toplink->sample_aspect_ratio.num != bottomlink->sample_aspect_ratio.num ||
toplink->sample_aspect_ratio.den != bottomlink->sample_aspect_ratio.den) {
av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
"(size %dx%d, SAR %d:%d) do not match the corresponding "
"second input link %s parameters (%dx%d, SAR %d:%d)\n",
ctx->input_pads[TOP].name, toplink->w, toplink->h,
toplink->sample_aspect_ratio.num,
toplink->sample_aspect_ratio.den,
ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h,
bottomlink->sample_aspect_ratio.num,
bottomlink->sample_aspect_ratio.den);
return AVERROR(EINVAL);
}
}
outlink->w = toplink->w;
outlink->h = toplink->h;
outlink->time_base = toplink->time_base;
outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
outlink->frame_rate = toplink->frame_rate;
s->hsub = pix_desc->log2_chroma_w;
s->vsub = pix_desc->log2_chroma_h;
is_16bit = pix_desc->comp[0].depth == 16;
s->nb_planes = av_pix_fmt_count_planes(toplink->format);
if (!s->tblend)
if ((ret = ff_dualinput_init(ctx, &s->dinput)) < 0)
return ret;
for (plane = 0; plane < FF_ARRAY_ELEMS(s->params); plane++) {
FilterParams *param = &s->params[plane];
if (s->all_mode >= 0)
param->mode = s->all_mode;
if (s->all_opacity < 1)
param->opacity = s->all_opacity;
switch (param->mode) {
case BLEND_ADDITION: param->blend = is_16bit ? blend_addition_16bit : blend_addition_8bit; break;
case BLEND_ADDITION128: param->blend = is_16bit ? blend_addition128_16bit : blend_addition128_8bit; break;
case BLEND_AND: param->blend = is_16bit ? blend_and_16bit : blend_and_8bit; break;
case BLEND_AVERAGE: param->blend = is_16bit ? blend_average_16bit : blend_average_8bit; break;
case BLEND_BURN: param->blend = is_16bit ? blend_burn_16bit : blend_burn_8bit; break;
case BLEND_DARKEN: param->blend = is_16bit ? blend_darken_16bit : blend_darken_8bit; break;
case BLEND_DIFFERENCE: param->blend = is_16bit ? blend_difference_16bit : blend_difference_8bit; break;
case BLEND_DIFFERENCE128: param->blend = is_16bit ? blend_difference128_16bit: blend_difference128_8bit; break;
case BLEND_DIVIDE: param->blend = is_16bit ? blend_divide_16bit : blend_divide_8bit; break;
case BLEND_DODGE: param->blend = is_16bit ? blend_dodge_16bit : blend_dodge_8bit; break;
case BLEND_EXCLUSION: param->blend = is_16bit ? blend_exclusion_16bit : blend_exclusion_8bit; break;
case BLEND_GLOW: param->blend = is_16bit ? blend_glow_16bit : blend_glow_8bit; break;
case BLEND_HARDLIGHT: param->blend = is_16bit ? blend_hardlight_16bit : blend_hardlight_8bit; break;
case BLEND_HARDMIX: param->blend = is_16bit ? blend_hardmix_16bit : blend_hardmix_8bit; break;
case BLEND_LIGHTEN: param->blend = is_16bit ? blend_lighten_16bit : blend_lighten_8bit; break;
case BLEND_LINEARLIGHT:param->blend = is_16bit ? blend_linearlight_16bit: blend_linearlight_8bit;break;
case BLEND_MULTIPLY: param->blend = is_16bit ? blend_multiply_16bit : blend_multiply_8bit; break;
case BLEND_NEGATION: param->blend = is_16bit ? blend_negation_16bit : blend_negation_8bit; break;
case BLEND_NORMAL: param->blend = param->opacity == 1 ? blend_normal:
is_16bit ? blend_normal_16bit : blend_normal_8bit; break;
case BLEND_OR: param->blend = is_16bit ? blend_or_16bit : blend_or_8bit; break;
case BLEND_OVERLAY: param->blend = is_16bit ? blend_overlay_16bit : blend_overlay_8bit; break;
case BLEND_PHOENIX: param->blend = is_16bit ? blend_phoenix_16bit : blend_phoenix_8bit; break;
case BLEND_PINLIGHT: param->blend = is_16bit ? blend_pinlight_16bit : blend_pinlight_8bit; break;
case BLEND_REFLECT: param->blend = is_16bit ? blend_reflect_16bit : blend_reflect_8bit; break;
case BLEND_SCREEN: param->blend = is_16bit ? blend_screen_16bit : blend_screen_8bit; break;
case BLEND_SOFTLIGHT: param->blend = is_16bit ? blend_softlight_16bit : blend_softlight_8bit; break;
case BLEND_SUBTRACT: param->blend = is_16bit ? blend_subtract_16bit : blend_subtract_8bit; break;
case BLEND_VIVIDLIGHT: param->blend = is_16bit ? blend_vividlight_16bit : blend_vividlight_8bit; break;
case BLEND_XOR: param->blend = is_16bit ? blend_xor_16bit : blend_xor_8bit; break;
}
if (ARCH_X86)
ff_blend_init_x86(param, is_16bit);
if (s->all_expr && !param->expr_str) {
param->expr_str = av_strdup(s->all_expr);
if (!param->expr_str)
return AVERROR(ENOMEM);
}
if (param->expr_str) {
ret = av_expr_parse(&param->e, param->expr_str, var_names,
NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0)
return ret;
param->blend = is_16bit? blend_expr_16bit : blend_expr_8bit;
}
}
return 0;
}
#if CONFIG_BLEND_FILTER
static int request_frame(AVFilterLink *outlink)
{
BlendContext *s = outlink->src->priv;
return ff_dualinput_request_frame(&s->dinput, outlink);
}
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
{
BlendContext *s = inlink->dst->priv;
return ff_dualinput_filter_frame(&s->dinput, inlink, buf);
}
static const AVFilterPad blend_inputs[] = {
{
.name = "top",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},{
.name = "bottom",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad blend_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
.request_frame = request_frame,
},
{ NULL }
};
AVFilter ff_vf_blend = {
.name = "blend",
.description = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
.init = init,
.uninit = uninit,
.priv_size = sizeof(BlendContext),
.query_formats = query_formats,
.inputs = blend_inputs,
.outputs = blend_outputs,
.priv_class = &blend_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
};
#endif
#if CONFIG_TBLEND_FILTER
static int tblend_filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
BlendContext *s = inlink->dst->priv;
AVFilterLink *outlink = inlink->dst->outputs[0];
if (s->prev_frame) {
AVFrame *out = blend_frame(inlink->dst, frame, s->prev_frame);
av_frame_free(&s->prev_frame);
s->prev_frame = frame;
return ff_filter_frame(outlink, out);
}
s->prev_frame = frame;
return 0;
}
static const AVOption tblend_options[] = {
COMMON_OPTIONS,
{ NULL }
};
AVFILTER_DEFINE_CLASS(tblend);
static const AVFilterPad tblend_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = tblend_filter_frame,
},
{ NULL }
};
static const AVFilterPad tblend_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};
AVFilter ff_vf_tblend = {
.name = "tblend",
.description = NULL_IF_CONFIG_SMALL("Blend successive frames."),
.priv_size = sizeof(BlendContext),
.priv_class = &tblend_class,
.query_formats = query_formats,
.init = init,
.uninit = uninit,
.inputs = tblend_inputs,
.outputs = tblend_outputs,
.flags = AVFILTER_FLAG_SLICE_THREADS,
};
#endif
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