58935b25 |
/*
* Copyright (c) 2010 Stefano Sabatini
* Copyright (c) 2010 Baptiste Coudurier
* Copyright (c) 2007 Bobby Bingham
*
* 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
*/
/**
* @file
* overlay one video on top of another
*/
#include "avfilter.h" |
b74a1da4 |
#include "formats.h" |
1d9c2dc8 |
#include "libavutil/common.h" |
58935b25 |
#include "libavutil/eval.h"
#include "libavutil/avstring.h" |
b54c0a55 |
#include "libavutil/opt.h" |
58935b25 |
#include "libavutil/pixdesc.h" |
7ffe76e5 |
#include "libavutil/imgutils.h" |
0ebcdf5c |
#include "libavutil/mathematics.h" |
9087eaf1 |
#include "libavutil/opt.h" |
58935b25 |
#include "internal.h" |
43286028 |
#include "dualinput.h" |
3013bfa8 |
#include "drawutils.h" |
803391f7 |
#include "video.h" |
58935b25 |
|
b0f29db5 |
static const char *const var_names[] = { |
58935b25 |
"main_w", "W", ///< width of the main video
"main_h", "H", ///< height of the main video
"overlay_w", "w", ///< width of the overlay video
"overlay_h", "h", ///< height of the overlay video |
cc3edd99 |
"hsub",
"vsub",
"x",
"y",
"n", ///< number of frame
"pos", ///< position in the file
"t", ///< timestamp expressed in seconds |
58935b25 |
NULL
};
enum var_name {
VAR_MAIN_W, VAR_MW,
VAR_MAIN_H, VAR_MH,
VAR_OVERLAY_W, VAR_OW,
VAR_OVERLAY_H, VAR_OH, |
cc3edd99 |
VAR_HSUB,
VAR_VSUB,
VAR_X,
VAR_Y,
VAR_N,
VAR_POS,
VAR_T, |
58935b25 |
VAR_VARS_NB
};
#define MAIN 0
#define OVERLAY 1
|
3013bfa8 |
#define R 0
#define G 1
#define B 2
#define A 3
#define Y 0
#define U 1
#define V 2
|
58935b25 |
typedef struct { |
b54c0a55 |
const AVClass *class; |
58935b25 |
int x, y; ///< position of overlayed picture
|
3013bfa8 |
int allow_packed_rgb;
uint8_t main_is_packed_rgb;
uint8_t main_rgba_map[4];
uint8_t main_has_alpha;
uint8_t overlay_is_packed_rgb;
uint8_t overlay_rgba_map[4];
uint8_t overlay_has_alpha; |
22b06103 |
enum OverlayFormat { OVERLAY_FORMAT_YUV420, OVERLAY_FORMAT_YUV444, OVERLAY_FORMAT_RGB, OVERLAY_FORMAT_NB} format; |
cc3edd99 |
enum EvalMode { EVAL_MODE_INIT, EVAL_MODE_FRAME, EVAL_MODE_NB } eval_mode; |
3013bfa8 |
|
43286028 |
FFDualInputContext dinput; |
58935b25 |
|
3013bfa8 |
int main_pix_step[4]; ///< steps per pixel for each plane of the main output
int overlay_pix_step[4]; ///< steps per pixel for each plane of the overlay |
58935b25 |
int hsub, vsub; ///< chroma subsampling values
|
cc3edd99 |
double var_values[VAR_VARS_NB]; |
9087eaf1 |
char *x_expr, *y_expr; |
15d2f269 |
AVExpr *x_pexpr, *y_pexpr; |
58935b25 |
} OverlayContext;
static av_cold void uninit(AVFilterContext *ctx)
{ |
4673a5a7 |
OverlayContext *s = ctx->priv; |
58935b25 |
|
43286028 |
ff_dualinput_uninit(&s->dinput); |
af00d68a |
av_expr_free(s->x_pexpr); s->x_pexpr = NULL;
av_expr_free(s->y_pexpr); s->y_pexpr = NULL; |
58935b25 |
}
|
d2752ef0 |
static inline int normalize_xy(double d, int chroma_sub)
{
if (isnan(d))
return INT_MAX;
return (int)d & ~((1 << chroma_sub) - 1);
}
|
15d2f269 |
static void eval_expr(AVFilterContext *ctx) |
d2752ef0 |
{ |
af00d68a |
OverlayContext *s = ctx->priv; |
d2752ef0 |
|
af00d68a |
s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, NULL);
s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
s->x = normalize_xy(s->var_values[VAR_X], s->hsub);
s->y = normalize_xy(s->var_values[VAR_Y], s->vsub); |
d2752ef0 |
}
|
9da36960 |
static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx) |
d2752ef0 |
{
int ret; |
aff6cebb |
AVExpr *old = NULL; |
d2752ef0 |
if (*pexpr) |
aff6cebb |
old = *pexpr; |
d2752ef0 |
ret = av_expr_parse(pexpr, expr, var_names,
NULL, NULL, NULL, NULL, 0, log_ctx); |
aff6cebb |
if (ret < 0) { |
d2752ef0 |
av_log(log_ctx, AV_LOG_ERROR, |
9da36960 |
"Error when evaluating the expression '%s' for %s\n",
expr, option); |
aff6cebb |
*pexpr = old;
return ret;
}
av_expr_free(old);
return 0; |
d2752ef0 |
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{ |
af00d68a |
OverlayContext *s = ctx->priv; |
d2752ef0 |
int ret;
if (!strcmp(cmd, "x")) |
af00d68a |
ret = set_expr(&s->x_pexpr, args, cmd, ctx); |
d2752ef0 |
else if (!strcmp(cmd, "y")) |
af00d68a |
ret = set_expr(&s->y_pexpr, args, cmd, ctx); |
d2752ef0 |
else
ret = AVERROR(ENOSYS);
if (ret < 0)
return ret;
|
af00d68a |
if (s->eval_mode == EVAL_MODE_INIT) { |
15d2f269 |
eval_expr(ctx);
av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n", |
af00d68a |
s->var_values[VAR_X], s->x,
s->var_values[VAR_Y], s->y); |
d2752ef0 |
}
return ret;
}
|
58935b25 |
static int query_formats(AVFilterContext *ctx)
{ |
af00d68a |
OverlayContext *s = ctx->priv; |
3013bfa8 |
/* overlay formats contains alpha, for avoiding conversion with alpha information loss */ |
22b06103 |
static const enum AVPixelFormat main_pix_fmts_yuv420[] = {
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_NONE |
f2d200d4 |
}; |
22b06103 |
static const enum AVPixelFormat overlay_pix_fmts_yuv420[] = {
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_NONE
};
static const enum AVPixelFormat main_pix_fmts_yuv444[] = {
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE |
f2d200d4 |
}; |
22b06103 |
static const enum AVPixelFormat overlay_pix_fmts_yuv444[] = {
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE
};
|
185d1f3b |
static const enum AVPixelFormat main_pix_fmts_rgb[] = { |
ac627b3d |
AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
AV_PIX_FMT_NONE |
3013bfa8 |
}; |
185d1f3b |
static const enum AVPixelFormat overlay_pix_fmts_rgb[] = { |
ac627b3d |
AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
AV_PIX_FMT_NONE |
3013bfa8 |
};
AVFilterFormats *main_formats;
AVFilterFormats *overlay_formats;
|
af00d68a |
switch (s->format) { |
22b06103 |
case OVERLAY_FORMAT_YUV420:
main_formats = ff_make_format_list(main_pix_fmts_yuv420);
overlay_formats = ff_make_format_list(overlay_pix_fmts_yuv420);
break;
case OVERLAY_FORMAT_YUV444:
main_formats = ff_make_format_list(main_pix_fmts_yuv444);
overlay_formats = ff_make_format_list(overlay_pix_fmts_yuv444);
break;
case OVERLAY_FORMAT_RGB: |
ad60b3b1 |
main_formats = ff_make_format_list(main_pix_fmts_rgb);
overlay_formats = ff_make_format_list(overlay_pix_fmts_rgb); |
22b06103 |
break; |
cfcab4c5 |
default:
av_assert0(0); |
3013bfa8 |
} |
58935b25 |
|
ad60b3b1 |
ff_formats_ref(main_formats, &ctx->inputs [MAIN ]->out_formats);
ff_formats_ref(overlay_formats, &ctx->inputs [OVERLAY]->out_formats);
ff_formats_ref(main_formats, &ctx->outputs[MAIN ]->in_formats ); |
58935b25 |
return 0;
}
|
ac627b3d |
static const enum AVPixelFormat alpha_pix_fmts[] = { |
f2d200d4 |
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_RGBA, |
ac627b3d |
AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE |
3013bfa8 |
};
|
58935b25 |
static int config_input_main(AVFilterLink *inlink)
{ |
a70519aa |
OverlayContext *s = inlink->dst->priv; |
59ee9f78 |
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format); |
58935b25 |
|
af00d68a |
av_image_fill_max_pixsteps(s->main_pix_step, NULL, pix_desc); |
3013bfa8 |
|
a70519aa |
s->hsub = pix_desc->log2_chroma_w;
s->vsub = pix_desc->log2_chroma_h; |
58935b25 |
|
af00d68a |
s->main_is_packed_rgb =
ff_fill_rgba_map(s->main_rgba_map, inlink->format) >= 0;
s->main_has_alpha = ff_fmt_is_in(inlink->format, alpha_pix_fmts); |
58935b25 |
return 0;
}
static int config_input_overlay(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst; |
a70519aa |
OverlayContext *s = inlink->dst->priv; |
58935b25 |
int ret; |
79393a83 |
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format); |
3013bfa8 |
|
af00d68a |
av_image_fill_max_pixsteps(s->overlay_pix_step, NULL, pix_desc); |
58935b25 |
/* Finish the configuration by evaluating the expressions
now when both inputs are configured. */ |
af00d68a |
s->var_values[VAR_MAIN_W ] = s->var_values[VAR_MW] = ctx->inputs[MAIN ]->w;
s->var_values[VAR_MAIN_H ] = s->var_values[VAR_MH] = ctx->inputs[MAIN ]->h;
s->var_values[VAR_OVERLAY_W] = s->var_values[VAR_OW] = ctx->inputs[OVERLAY]->w;
s->var_values[VAR_OVERLAY_H] = s->var_values[VAR_OH] = ctx->inputs[OVERLAY]->h;
s->var_values[VAR_HSUB] = 1<<pix_desc->log2_chroma_w;
s->var_values[VAR_VSUB] = 1<<pix_desc->log2_chroma_h;
s->var_values[VAR_X] = NAN;
s->var_values[VAR_Y] = NAN;
s->var_values[VAR_N] = 0;
s->var_values[VAR_T] = NAN;
s->var_values[VAR_POS] = NAN;
if ((ret = set_expr(&s->x_pexpr, s->x_expr, "x", ctx)) < 0 ||
(ret = set_expr(&s->y_pexpr, s->y_expr, "y", ctx)) < 0) |
d2752ef0 |
return ret; |
58935b25 |
|
af00d68a |
s->overlay_is_packed_rgb =
ff_fill_rgba_map(s->overlay_rgba_map, inlink->format) >= 0;
s->overlay_has_alpha = ff_fmt_is_in(inlink->format, alpha_pix_fmts); |
3013bfa8 |
|
af00d68a |
if (s->eval_mode == EVAL_MODE_INIT) { |
15d2f269 |
eval_expr(ctx);
av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n", |
af00d68a |
s->var_values[VAR_X], s->x,
s->var_values[VAR_Y], s->y); |
cc3edd99 |
}
|
1a49a169 |
av_log(ctx, AV_LOG_VERBOSE, |
cc3edd99 |
"main w:%d h:%d fmt:%s overlay w:%d h:%d fmt:%s\n", |
58935b25 |
ctx->inputs[MAIN]->w, ctx->inputs[MAIN]->h, |
59ee9f78 |
av_get_pix_fmt_name(ctx->inputs[MAIN]->format), |
58935b25 |
ctx->inputs[OVERLAY]->w, ctx->inputs[OVERLAY]->h, |
59ee9f78 |
av_get_pix_fmt_name(ctx->inputs[OVERLAY]->format)); |
58935b25 |
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
outlink->w = ctx->inputs[MAIN]->w;
outlink->h = ctx->inputs[MAIN]->h; |
ab35ec29 |
outlink->time_base = ctx->inputs[MAIN]->time_base; |
58935b25 |
return 0;
}
|
3013bfa8 |
// divide by 255 and round to nearest
// apply a fast variant: (X+127)/255 = ((X+127)*257+257)>>16 = ((X+128)*257)>>16
#define FAST_DIV255(x) ((((x) + 128) * 257) >> 16)
|
13c62525 |
// calculate the unpremultiplied alpha, applying the general equation:
// alpha = alpha_overlay / ( (alpha_main + alpha_overlay) - (alpha_main * alpha_overlay) )
// (((x) << 16) - ((x) << 9) + (x)) is a faster version of: 255 * 255 * x
// ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)) is a faster version of: 255 * (x + y)
#define UNPREMULTIPLY_ALPHA(x, y) ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)))
|
5e402a53 |
/**
* Blend image in src to destination buffer dst at position (x, y).
*/
static void blend_image(AVFilterContext *ctx, |
43286028 |
AVFrame *dst, const AVFrame *src, |
5e402a53 |
int x, int y) |
58935b25 |
{ |
a70519aa |
OverlayContext *s = ctx->priv; |
f164228f |
int i, imax, j, jmax, k, kmax; |
a05a44e2 |
const int src_w = src->width;
const int src_h = src->height;
const int dst_w = dst->width;
const int dst_h = dst->height; |
f164228f |
if (x >= dst_w || x+dst_w < 0 ||
y >= dst_h || y+dst_h < 0)
return; /* no intersection */ |
58935b25 |
|
af00d68a |
if (s->main_is_packed_rgb) { |
3013bfa8 |
uint8_t alpha; ///< the amount of overlay to blend on to main |
af00d68a |
const int dr = s->main_rgba_map[R];
const int dg = s->main_rgba_map[G];
const int db = s->main_rgba_map[B];
const int da = s->main_rgba_map[A];
const int dstep = s->main_pix_step[0];
const int sr = s->overlay_rgba_map[R];
const int sg = s->overlay_rgba_map[G];
const int sb = s->overlay_rgba_map[B];
const int sa = s->overlay_rgba_map[A];
const int sstep = s->overlay_pix_step[0];
const int main_has_alpha = s->main_has_alpha; |
f164228f |
uint8_t *s, *sp, *d, *dp;
i = FFMAX(-y, 0);
sp = src->data[0] + i * src->linesize[0];
dp = dst->data[0] + (y+i) * dst->linesize[0];
for (imax = FFMIN(-y + dst_h, src_h); i < imax; i++) {
j = FFMAX(-x, 0);
s = sp + j * sstep;
d = dp + (x+j) * dstep;
for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) { |
3013bfa8 |
alpha = s[sa]; |
2f7c8aef |
// if the main channel has an alpha channel, alpha has to be calculated
// to create an un-premultiplied (straight) alpha value
if (main_has_alpha && alpha != 0 && alpha != 255) { |
13c62525 |
uint8_t alpha_d = d[da];
alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d); |
2f7c8aef |
}
|
3013bfa8 |
switch (alpha) {
case 0:
break;
case 255:
d[dr] = s[sr];
d[dg] = s[sg];
d[db] = s[sb];
break;
default:
// main_value = main_value * (1 - alpha) + overlay_value * alpha
// since alpha is in the range 0-255, the result must divided by 255
d[dr] = FAST_DIV255(d[dr] * (255 - alpha) + s[sr] * alpha);
d[dg] = FAST_DIV255(d[dg] * (255 - alpha) + s[sg] * alpha);
d[db] = FAST_DIV255(d[db] * (255 - alpha) + s[sb] * alpha);
} |
2f7c8aef |
if (main_has_alpha) {
switch (alpha) {
case 0:
break;
case 255:
d[da] = s[sa];
break;
default:
// apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha
d[da] += FAST_DIV255((255 - d[da]) * s[sa]);
}
} |
3013bfa8 |
d += dstep;
s += sstep; |
58935b25 |
}
dp += dst->linesize[0];
sp += src->linesize[0];
}
} else { |
af00d68a |
const int main_has_alpha = s->main_has_alpha; |
13c62525 |
if (main_has_alpha) {
uint8_t alpha; ///< the amount of overlay to blend on to main |
f164228f |
uint8_t *s, *sa, *d, *da;
i = FFMAX(-y, 0);
sa = src->data[3] + i * src->linesize[3];
da = dst->data[3] + (y+i) * dst->linesize[3];
for (imax = FFMIN(-y + dst_h, src_h); i < imax; i++) {
j = FFMAX(-x, 0);
s = sa + j;
d = da + x+j;
for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) { |
13c62525 |
alpha = *s;
if (alpha != 0 && alpha != 255) {
uint8_t alpha_d = *d;
alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d);
}
switch (alpha) {
case 0:
break;
case 255:
*d = *s;
break;
default:
// apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha
*d += FAST_DIV255((255 - *d) * *s);
}
d += 1;
s += 1;
}
da += dst->linesize[3];
sa += src->linesize[3];
}
} |
58935b25 |
for (i = 0; i < 3; i++) { |
a70519aa |
int hsub = i ? s->hsub : 0;
int vsub = i ? s->vsub : 0; |
f0250cc4 |
int src_wp = FF_CEIL_RSHIFT(src_w, hsub);
int src_hp = FF_CEIL_RSHIFT(src_h, vsub);
int dst_wp = FF_CEIL_RSHIFT(dst_w, hsub);
int dst_hp = FF_CEIL_RSHIFT(dst_h, vsub); |
f164228f |
int yp = y>>vsub;
int xp = x>>hsub;
uint8_t *s, *sp, *d, *dp, *a, *ap;
j = FFMAX(-yp, 0);
sp = src->data[i] + j * src->linesize[i];
dp = dst->data[i] + (yp+j) * dst->linesize[i];
ap = src->data[3] + (j<<vsub) * src->linesize[3];
for (jmax = FFMIN(-yp + dst_hp, src_hp); j < jmax; j++) {
k = FFMAX(-xp, 0);
d = dp + xp+k;
s = sp + k;
a = ap + (k<<hsub);
for (kmax = FFMIN(-xp + dst_wp, src_wp); k < kmax; k++) { |
58935b25 |
int alpha_v, alpha_h, alpha; |
f164228f |
// average alpha for color components, improve quality
if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) { |
58935b25 |
alpha = (a[0] + a[src->linesize[3]] +
a[1] + a[src->linesize[3]+1]) >> 2;
} else if (hsub || vsub) { |
f164228f |
alpha_h = hsub && k+1 < src_wp ? |
58935b25 |
(a[0] + a[1]) >> 1 : a[0]; |
f164228f |
alpha_v = vsub && j+1 < src_hp ? |
58935b25 |
(a[0] + a[src->linesize[3]]) >> 1 : a[0];
alpha = (alpha_v + alpha_h) >> 1;
} else
alpha = a[0]; |
13c62525 |
// if the main channel has an alpha channel, alpha has to be calculated
// to create an un-premultiplied (straight) alpha value
if (main_has_alpha && alpha != 0 && alpha != 255) {
// average alpha for color components, improve quality
uint8_t alpha_d; |
f164228f |
if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) { |
13c62525 |
alpha_d = (d[0] + d[src->linesize[3]] +
d[1] + d[src->linesize[3]+1]) >> 2;
} else if (hsub || vsub) { |
f164228f |
alpha_h = hsub && k+1 < src_wp ? |
13c62525 |
(d[0] + d[1]) >> 1 : d[0]; |
f164228f |
alpha_v = vsub && j+1 < src_hp ? |
13c62525 |
(d[0] + d[src->linesize[3]]) >> 1 : d[0];
alpha_d = (alpha_v + alpha_h) >> 1;
} else
alpha_d = d[0];
alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d);
} |
0b3e9d5d |
*d = FAST_DIV255(*d * (255 - alpha) + *s * alpha);
s++; |
58935b25 |
d++;
a += 1 << hsub;
}
dp += dst->linesize[i];
sp += src->linesize[i];
ap += (1 << vsub) * src->linesize[3];
}
}
}
}
|
43286028 |
static AVFrame *do_blend(AVFilterContext *ctx, AVFrame *mainpic,
const AVFrame *second) |
58935b25 |
{ |
af00d68a |
OverlayContext *s = ctx->priv; |
cc3edd99 |
AVFilterLink *inlink = ctx->inputs[0]; |
54b0c04a |
|
43286028 |
/* TODO: reindent */ |
af00d68a |
if (s->eval_mode == EVAL_MODE_FRAME) { |
cc3edd99 |
int64_t pos = av_frame_get_pkt_pos(mainpic);
|
af00d68a |
s->var_values[VAR_N] = inlink->frame_count;
s->var_values[VAR_T] = mainpic->pts == AV_NOPTS_VALUE ? |
cc3edd99 |
NAN : mainpic->pts * av_q2d(inlink->time_base); |
af00d68a |
s->var_values[VAR_POS] = pos == -1 ? NAN : pos; |
cc3edd99 |
|
15d2f269 |
eval_expr(ctx);
av_log(ctx, AV_LOG_DEBUG, "n:%f t:%f pos:%f x:%f xi:%d y:%f yi:%d\n", |
af00d68a |
s->var_values[VAR_N], s->var_values[VAR_T], s->var_values[VAR_POS],
s->var_values[VAR_X], s->x,
s->var_values[VAR_Y], s->y); |
cc3edd99 |
} |
52820bc5 |
|
43286028 |
blend_image(ctx, mainpic, second, s->x, s->y);
return mainpic; |
06bf6d3b |
}
|
a05a44e2 |
static int filter_frame_main(AVFilterLink *inlink, AVFrame *inpicref) |
06bf6d3b |
{ |
43286028 |
OverlayContext *s = inlink->dst->priv;
return ff_dualinput_filter_frame_main(&s->dinput, inlink, inpicref); |
06bf6d3b |
} |
58935b25 |
|
a05a44e2 |
static int filter_frame_over(AVFilterLink *inlink, AVFrame *inpicref) |
e36b25d1 |
{ |
43286028 |
OverlayContext *s = inlink->dst->priv;
return ff_dualinput_filter_frame_second(&s->dinput, inlink, inpicref); |
06bf6d3b |
} |
e36b25d1 |
|
06bf6d3b |
static int request_frame(AVFilterLink *outlink)
{ |
43286028 |
OverlayContext *s = outlink->src->priv;
return ff_dualinput_request_frame(&s->dinput, outlink); |
e36b25d1 |
}
|
92a2d12a |
static av_cold int init(AVFilterContext *ctx)
{
OverlayContext *s = ctx->priv;
if (s->allow_packed_rgb) {
av_log(ctx, AV_LOG_WARNING,
"The rgb option is deprecated and is overriding the format option, use format instead\n");
s->format = OVERLAY_FORMAT_RGB;
}
s->dinput.process = do_blend;
return 0;
}
|
e434ddd4 |
#define OFFSET(x) offsetof(OverlayContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
4673a5a7 |
|
e434ddd4 |
static const AVOption overlay_options[] = {
{ "x", "set the x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "y", "set the y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_FRAME}, 0, EVAL_MODE_NB-1, FLAGS, "eval" }, |
a77454ec |
{ "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
{ "frame", "eval expressions per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" }, |
e434ddd4 |
{ "rgb", "force packed RGB in input and output (deprecated)", OFFSET(allow_packed_rgb), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS }, |
43286028 |
{ "shortest", "force termination when the shortest input terminates", OFFSET(dinput.shortest), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS }, |
e434ddd4 |
{ "format", "set output format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=OVERLAY_FORMAT_YUV420}, 0, OVERLAY_FORMAT_NB-1, FLAGS, "format" }, |
a77454ec |
{ "yuv420", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV420}, .flags = FLAGS, .unit = "format" },
{ "yuv444", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV444}, .flags = FLAGS, .unit = "format" },
{ "rgb", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_RGB}, .flags = FLAGS, .unit = "format" }, |
43286028 |
{ "repeatlast", "repeat overlay of the last overlay frame", OFFSET(dinput.repeatlast), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS }, |
e434ddd4 |
{ NULL } |
9087eaf1 |
};
|
e434ddd4 |
AVFILTER_DEFINE_CLASS(overlay); |
9087eaf1 |
|
568c70e7 |
static const AVFilterPad avfilter_vf_overlay_inputs[] = {
{
.name = "main",
.type = AVMEDIA_TYPE_VIDEO, |
3d1e2ada |
.get_video_buffer = ff_null_get_video_buffer, |
568c70e7 |
.config_props = config_input_main, |
1776177b |
.filter_frame = filter_frame_main, |
7e350379 |
.needs_writable = 1, |
568c70e7 |
},
{
.name = "overlay",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input_overlay, |
1776177b |
.filter_frame = filter_frame_over, |
568c70e7 |
},
{ NULL }
};
static const AVFilterPad avfilter_vf_overlay_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
.request_frame = request_frame,
},
{ NULL }
};
|
58935b25 |
AVFilter avfilter_vf_overlay = {
.name = "overlay",
.description = NULL_IF_CONFIG_SMALL("Overlay a video source on top of the input."),
.init = init,
.uninit = uninit,
.priv_size = sizeof(OverlayContext), |
9087eaf1 |
.priv_class = &overlay_class, |
58935b25 |
.query_formats = query_formats, |
d2752ef0 |
.process_command = process_command, |
58935b25 |
|
568c70e7 |
.inputs = avfilter_vf_overlay_inputs,
.outputs = avfilter_vf_overlay_outputs, |
1776177b |
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, |
58935b25 |
}; |