virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-11-26 19:01:44 +02:00
Code Issues Releases Activity
b9ba036680
FFmpeg/libavfilter/vf_overlay.c
Anton Khirnov 27f8c9b27b lavu/frame: deprecate AVFrame.pkt_{pos,size} 
These fields are supposed to store information about the packet the
frame was decoded from, specifically the byte offset it was stored at
and its size.

However,
- the fields are highly ad-hoc - there is no strong reason why
  specifically those (and not any other) packet properties should have a
  dedicated field in AVFrame; unlike e.g. the timestamps, there is no
  fundamental link between coded packet offset/size and decoded frames
- they only make sense for frames produced by decoding demuxed packets,
  and even then it is not always the case that the encoded data was
  stored in the file as a contiguous sequence of bytes (in order for pos
  to be well-defined)
- pkt_pos was added without much explanation, apparently to allow
  passthrough of this information through lavfi in order to handle byte
  seeking in ffplay. That is now implemented using arbitrary user data
  passthrough in AVFrame.opaque_ref.
- several filters use pkt_pos as a variable available to user-supplied
  expressions, but there seems to be no established motivation for using them.
- pkt_size was added for use in ffprobe, but that too is now handled
  without using this field. Additonally, the values of this field
  produced by libavcodec are flawed, as described in the previous
  ffprobe conversion commit.

In summary - these fields are ill-defined and insufficiently motivated,
so deprecate them.
2023-03-20 10:42:09 +01:00

1136 lines
54 KiB
C
Raw Blame History

/*
* 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"
#include "formats.h"
#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/avstring.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/timestamp.h"
#include "internal.h"
#include "drawutils.h"
#include "framesync.h"
#include "video.h"
#include "vf_overlay.h"
typedef struct ThreadData {
AVFrame *dst, *src;
} ThreadData;
static const char *const var_names[] = {
"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
"hsub",
"vsub",
"x",
"y",
"n", ///< number of frame
#if FF_API_FRAME_PKT
"pos", ///< position in the file
#endif
"t", ///< timestamp expressed in seconds
NULL
};
#define MAIN 0
#define OVERLAY 1
#define R 0
#define G 1
#define B 2
#define A 3
#define Y 0
#define U 1
#define V 2
enum EvalMode {
EVAL_MODE_INIT,
EVAL_MODE_FRAME,
EVAL_MODE_NB
};
static av_cold void uninit(AVFilterContext *ctx)
{
OverlayContext *s = ctx->priv;
ff_framesync_uninit(&s->fs);
av_expr_free(s->x_pexpr); s->x_pexpr = NULL;
av_expr_free(s->y_pexpr); s->y_pexpr = NULL;
}
static inline int normalize_xy(double d, int chroma_sub)
{
if (isnan(d))
return INT_MAX;
return (int)d & ~((1 << chroma_sub) - 1);
}
static void eval_expr(AVFilterContext *ctx)
{
OverlayContext *s = ctx->priv;
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);
/* It is necessary if x is expressed from y */
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);
}
static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
{
int ret;
AVExpr *old = NULL;
if (*pexpr)
old = *pexpr;
ret = av_expr_parse(pexpr, expr, var_names,
NULL, NULL, NULL, NULL, 0, log_ctx);
if (ret < 0) {
av_log(log_ctx, AV_LOG_ERROR,
"Error when evaluating the expression '%s' for %s\n",
expr, option);
*pexpr = old;
return ret;
}
av_expr_free(old);
return 0;
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
OverlayContext *s = ctx->priv;
int ret;
if (!strcmp(cmd, "x"))
ret = set_expr(&s->x_pexpr, args, cmd, ctx);
else if (!strcmp(cmd, "y"))
ret = set_expr(&s->y_pexpr, args, cmd, ctx);
else
ret = AVERROR(ENOSYS);
if (ret < 0)
return ret;
if (s->eval_mode == EVAL_MODE_INIT) {
eval_expr(ctx);
av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n",
s->var_values[VAR_X], s->x,
s->var_values[VAR_Y], s->y);
}
return ret;
}
static const enum AVPixelFormat alpha_pix_fmts[] = {
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10,
AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_RGBA,
AV_PIX_FMT_BGRA, AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE
};
static int query_formats(AVFilterContext *ctx)
{
OverlayContext *s = ctx->priv;
/* overlay formats contains alpha, for avoiding conversion with alpha information loss */
static const enum AVPixelFormat main_pix_fmts_yuv420[] = {
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVA420P,
AV_PIX_FMT_NV12, AV_PIX_FMT_NV21,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat overlay_pix_fmts_yuv420[] = {
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_NONE
};
static const enum AVPixelFormat main_pix_fmts_yuv420p10[] = {
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUVA420P10,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat overlay_pix_fmts_yuv420p10[] = {
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_NONE
};
static const enum AVPixelFormat main_pix_fmts_yuv422[] = {
AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_NONE
};
static const enum AVPixelFormat overlay_pix_fmts_yuv422[] = {
AV_PIX_FMT_YUVA422P, AV_PIX_FMT_NONE
};
static const enum AVPixelFormat main_pix_fmts_yuv422p10[] = {
AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_NONE
};
static const enum AVPixelFormat overlay_pix_fmts_yuv422p10[] = {
AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_NONE
};
static const enum AVPixelFormat main_pix_fmts_yuv444[] = {
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE
};
static const enum AVPixelFormat overlay_pix_fmts_yuv444[] = {
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE
};
static const enum AVPixelFormat main_pix_fmts_gbrp[] = {
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE
};
static const enum AVPixelFormat overlay_pix_fmts_gbrp[] = {
AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE
};
static const enum AVPixelFormat main_pix_fmts_rgb[] = {
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
};
static const enum AVPixelFormat overlay_pix_fmts_rgb[] = {
AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
AV_PIX_FMT_NONE
};
const enum AVPixelFormat *main_formats, *overlay_formats;
AVFilterFormats *formats;
int ret;
switch (s->format) {
case OVERLAY_FORMAT_YUV420:
main_formats = main_pix_fmts_yuv420;
overlay_formats = overlay_pix_fmts_yuv420;
break;
case OVERLAY_FORMAT_YUV420P10:
main_formats = main_pix_fmts_yuv420p10;
overlay_formats = overlay_pix_fmts_yuv420p10;
break;
case OVERLAY_FORMAT_YUV422:
main_formats = main_pix_fmts_yuv422;
overlay_formats = overlay_pix_fmts_yuv422;
break;
case OVERLAY_FORMAT_YUV422P10:
main_formats = main_pix_fmts_yuv422p10;
overlay_formats = overlay_pix_fmts_yuv422p10;
break;
case OVERLAY_FORMAT_YUV444:
main_formats = main_pix_fmts_yuv444;
overlay_formats = overlay_pix_fmts_yuv444;
break;
case OVERLAY_FORMAT_RGB:
main_formats = main_pix_fmts_rgb;
overlay_formats = overlay_pix_fmts_rgb;
break;
case OVERLAY_FORMAT_GBRP:
main_formats = main_pix_fmts_gbrp;
overlay_formats = overlay_pix_fmts_gbrp;
break;
case OVERLAY_FORMAT_AUTO:
return ff_set_common_formats_from_list(ctx, alpha_pix_fmts);
default:
av_assert0(0);
}
formats = ff_make_format_list(main_formats);
if ((ret = ff_formats_ref(formats, &ctx->inputs[MAIN]->outcfg.formats)) < 0 ||
(ret = ff_formats_ref(formats, &ctx->outputs[MAIN]->incfg.formats)) < 0)
return ret;
return ff_formats_ref(ff_make_format_list(overlay_formats),
&ctx->inputs[OVERLAY]->outcfg.formats);
}
static int config_input_overlay(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
OverlayContext *s = inlink->dst->priv;
int ret;
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
av_image_fill_max_pixsteps(s->overlay_pix_step, NULL, pix_desc);
/* Finish the configuration by evaluating the expressions
now when both inputs are configured. */
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;
#if FF_API_FRAME_PKT
s->var_values[VAR_POS] = NAN;
#endif
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)
return ret;
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);
if (s->eval_mode == EVAL_MODE_INIT) {
eval_expr(ctx);
av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n",
s->var_values[VAR_X], s->x,
s->var_values[VAR_Y], s->y);
}
av_log(ctx, AV_LOG_VERBOSE,
"main w:%d h:%d fmt:%s overlay w:%d h:%d fmt:%s\n",
ctx->inputs[MAIN]->w, ctx->inputs[MAIN]->h,
av_get_pix_fmt_name(ctx->inputs[MAIN]->format),
ctx->inputs[OVERLAY]->w, ctx->inputs[OVERLAY]->h,
av_get_pix_fmt_name(ctx->inputs[OVERLAY]->format));
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
OverlayContext *s = ctx->priv;
int ret;
if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)
return ret;
outlink->w = ctx->inputs[MAIN]->w;
outlink->h = ctx->inputs[MAIN]->h;
outlink->time_base = ctx->inputs[MAIN]->time_base;
return ff_framesync_configure(&s->fs);
}
// 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)
// 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)))
/**
* Blend image in src to destination buffer dst at position (x, y).
*/
static av_always_inline void blend_slice_packed_rgb(AVFilterContext *ctx,
AVFrame *dst, const AVFrame *src,
int main_has_alpha, int x, int y,
int is_straight, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
int i, imax, j, jmax;
const int src_w = src->width;
const int src_h = src->height;
const int dst_w = dst->width;
const int dst_h = dst->height;
uint8_t alpha; ///< the amount of overlay to blend on to main
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];
int slice_start, slice_end;
uint8_t *S, *sp, *d, *dp;
i = FFMAX(-y, 0);
imax = FFMIN3(-y + dst_h, FFMIN(src_h, dst_h), y + src_h);
slice_start = i + (imax * jobnr) / nb_jobs;
slice_end = i + (imax * (jobnr+1)) / nb_jobs;
sp = src->data[0] + (slice_start) * src->linesize[0];
dp = dst->data[0] + (y + slice_start) * dst->linesize[0];
for (i = slice_start; i < slice_end; 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++) {
alpha = S[sa];
// 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) {
uint8_t alpha_d = d[da];
alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d);
}
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] = is_straight ? FAST_DIV255(d[dr] * (255 - alpha) + S[sr] * alpha) :
FFMIN(FAST_DIV255(d[dr] * (255 - alpha)) + S[sr], 255);
d[dg] = is_straight ? FAST_DIV255(d[dg] * (255 - alpha) + S[sg] * alpha) :
FFMIN(FAST_DIV255(d[dg] * (255 - alpha)) + S[sg], 255);
d[db] = is_straight ? FAST_DIV255(d[db] * (255 - alpha) + S[sb] * alpha) :
FFMIN(FAST_DIV255(d[db] * (255 - alpha)) + S[sb], 255);
}
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]);
}
}
d += dstep;
S += sstep;
}
dp += dst->linesize[0];
sp += src->linesize[0];
}
}
#define DEFINE_BLEND_PLANE(depth, nbits) \
static av_always_inline void blend_plane_##depth##_##nbits##bits(AVFilterContext *ctx, \
AVFrame *dst, const AVFrame *src, \
int src_w, int src_h, \
int dst_w, int dst_h, \
int i, int hsub, int vsub, \
int x, int y, \
int main_has_alpha, \
int dst_plane, \
int dst_offset, \
int dst_step, \
int straight, \
int yuv, \
int jobnr, \
int nb_jobs) \
{ \
OverlayContext *octx = ctx->priv; \
int src_wp = AV_CEIL_RSHIFT(src_w, hsub); \
int src_hp = AV_CEIL_RSHIFT(src_h, vsub); \
int dst_wp = AV_CEIL_RSHIFT(dst_w, hsub); \
int dst_hp = AV_CEIL_RSHIFT(dst_h, vsub); \
int yp = y>>vsub; \
int xp = x>>hsub; \
uint##depth##_t *s, *sp, *d, *dp, *dap, *a, *da, *ap; \
int jmax, j, k, kmax; \
int slice_start, slice_end; \
const uint##depth##_t max = (1 << nbits) - 1; \
const uint##depth##_t mid = (1 << (nbits -1)) ; \
int bytes = depth / 8; \
\
dst_step /= bytes; \
j = FFMAX(-yp, 0); \
jmax = FFMIN3(-yp + dst_hp, FFMIN(src_hp, dst_hp), yp + src_hp); \
\
slice_start = j + (jmax * jobnr) / nb_jobs; \
slice_end = j + (jmax * (jobnr+1)) / nb_jobs; \
\
sp = (uint##depth##_t *)(src->data[i] + (slice_start) * src->linesize[i]); \
dp = (uint##depth##_t *)(dst->data[dst_plane] \
+ (yp + slice_start) * dst->linesize[dst_plane] \
+ dst_offset); \
ap = (uint##depth##_t *)(src->data[3] + (slice_start << vsub) * src->linesize[3]); \
dap = (uint##depth##_t *)(dst->data[3] + ((yp + slice_start) << vsub) * dst->linesize[3]); \
\
for (j = slice_start; j < slice_end; j++) { \
k = FFMAX(-xp, 0); \
d = dp + (xp+k) * dst_step; \
s = sp + k; \
a = ap + (k<<hsub); \
da = dap + ((xp+k) << hsub); \
kmax = FFMIN(-xp + dst_wp, src_wp); \
\
if (nbits == 8 && ((vsub && j+1 < src_hp) || !vsub) && octx->blend_row[i]) { \
int c = octx->blend_row[i]((uint8_t*)d, (uint8_t*)da, (uint8_t*)s, \
(uint8_t*)a, kmax - k, src->linesize[3]); \
\
s += c; \
d += dst_step * c; \
da += (1 << hsub) * c; \
a += (1 << hsub) * c; \
k += c; \
} \
for (; k < kmax; k++) { \
int alpha_v, alpha_h, alpha; \
\
/* average alpha for color components, improve quality */ \
if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) { \
alpha = (a[0] + a[src->linesize[3]] + \
a[1] + a[src->linesize[3]+1]) >> 2; \
} else if (hsub || vsub) { \
alpha_h = hsub && k+1 < src_wp ? \
(a[0] + a[1]) >> 1 : a[0]; \
alpha_v = vsub && j+1 < src_hp ? \
(a[0] + a[src->linesize[3]]) >> 1 : a[0]; \
alpha = (alpha_v + alpha_h) >> 1; \
} else \
alpha = a[0]; \
/* 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 != max) { \
/* average alpha for color components, improve quality */ \
uint8_t alpha_d; \
if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) { \
alpha_d = (da[0] + da[dst->linesize[3]] + \
da[1] + da[dst->linesize[3]+1]) >> 2; \
} else if (hsub || vsub) { \
alpha_h = hsub && k+1 < src_wp ? \
(da[0] + da[1]) >> 1 : da[0]; \
alpha_v = vsub && j+1 < src_hp ? \
(da[0] + da[dst->linesize[3]]) >> 1 : da[0]; \
alpha_d = (alpha_v + alpha_h) >> 1; \
} else \
alpha_d = da[0]; \
alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d); \
} \
if (straight) { \
if (nbits > 8) \
*d = (*d * (max - alpha) + *s * alpha) / max; \
else \
*d = FAST_DIV255(*d * (255 - alpha) + *s * alpha); \
} else { \
if (nbits > 8) { \
if (i && yuv) \
*d = av_clip((*d * (max - alpha) + *s * alpha) / max + *s - mid, -mid, mid) + mid; \
else \
*d = av_clip_uintp2((*d * (max - alpha) + *s * alpha) / max + *s - (16<<(nbits-8)),\
nbits);\
} else { \
if (i && yuv) \
*d = av_clip(FAST_DIV255((*d - mid) * (max - alpha)) + *s - mid, -mid, mid) + mid; \
else \
*d = av_clip_uint8(FAST_DIV255(*d * (255 - alpha)) + *s - 16); \
} \
} \
s++; \
d += dst_step; \
da += 1 << hsub; \
a += 1 << hsub; \
} \
dp += dst->linesize[dst_plane] / bytes; \
sp += src->linesize[i] / bytes; \
ap += (1 << vsub) * src->linesize[3] / bytes; \
dap += (1 << vsub) * dst->linesize[3] / bytes; \
} \
}
DEFINE_BLEND_PLANE(8, 8)
DEFINE_BLEND_PLANE(16, 10)
#define DEFINE_ALPHA_COMPOSITE(depth, nbits) \
static inline void alpha_composite_##depth##_##nbits##bits(const AVFrame *src, const AVFrame *dst, \
int src_w, int src_h, \
int dst_w, int dst_h, \
int x, int y, \
int jobnr, int nb_jobs) \
{ \
uint##depth##_t alpha; /* the amount of overlay to blend on to main */ \
uint##depth##_t *s, *sa, *d, *da; \
int i, imax, j, jmax; \
int slice_start, slice_end; \
const uint##depth##_t max = (1 << nbits) - 1; \
int bytes = depth / 8; \
\
imax = FFMIN3(-y + dst_h, FFMIN(src_h, dst_h), y + src_h); \
i = FFMAX(-y, 0); \
\
slice_start = i + (imax * jobnr) / nb_jobs; \
slice_end = i + ((imax * (jobnr+1)) / nb_jobs); \
\
sa = (uint##depth##_t *)(src->data[3] + (slice_start) * src->linesize[3]); \
da = (uint##depth##_t *)(dst->data[3] + (y + slice_start) * dst->linesize[3]); \
\
for (i = slice_start; i < slice_end; i++) { \
j = FFMAX(-x, 0); \
s = sa + j; \
d = da + x+j; \
\
for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) { \
alpha = *s; \
if (alpha != 0 && alpha != max) { \
uint8_t alpha_d = *d; \
alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d); \
} \
if (alpha == max) \
*d = *s; \
else if (alpha > 0) { \
/* apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha */ \
if (nbits > 8) \
*d += (max - *d) * *s / max; \
else \
*d += FAST_DIV255((max - *d) * *s); \
} \
d += 1; \
s += 1; \
} \
da += dst->linesize[3] / bytes; \
sa += src->linesize[3] / bytes; \
} \
}
DEFINE_ALPHA_COMPOSITE(8, 8)
DEFINE_ALPHA_COMPOSITE(16, 10)
#define DEFINE_BLEND_SLICE_YUV(depth, nbits) \
static av_always_inline void blend_slice_yuv_##depth##_##nbits##bits(AVFilterContext *ctx, \
AVFrame *dst, const AVFrame *src, \
int hsub, int vsub, \
int main_has_alpha, \
int x, int y, \
int is_straight, \
int jobnr, int nb_jobs) \
{ \
OverlayContext *s = ctx->priv; \
const int src_w = src->width; \
const int src_h = src->height; \
const int dst_w = dst->width; \
const int dst_h = dst->height; \
\
blend_plane_##depth##_##nbits##bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 0, 0, 0, \
x, y, main_has_alpha, s->main_desc->comp[0].plane, s->main_desc->comp[0].offset, \
s->main_desc->comp[0].step, is_straight, 1, jobnr, nb_jobs); \
blend_plane_##depth##_##nbits##bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 1, hsub, vsub, \
x, y, main_has_alpha, s->main_desc->comp[1].plane, s->main_desc->comp[1].offset, \
s->main_desc->comp[1].step, is_straight, 1, jobnr, nb_jobs); \
blend_plane_##depth##_##nbits##bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 2, hsub, vsub, \
x, y, main_has_alpha, s->main_desc->comp[2].plane, s->main_desc->comp[2].offset, \
s->main_desc->comp[2].step, is_straight, 1, jobnr, nb_jobs); \
\
if (main_has_alpha) \
alpha_composite_##depth##_##nbits##bits(src, dst, src_w, src_h, dst_w, dst_h, x, y, \
jobnr, nb_jobs); \
}
DEFINE_BLEND_SLICE_YUV(8, 8)
DEFINE_BLEND_SLICE_YUV(16, 10)
static av_always_inline void blend_slice_planar_rgb(AVFilterContext *ctx,
AVFrame *dst, const AVFrame *src,
int hsub, int vsub,
int main_has_alpha,
int x, int y,
int is_straight,
int jobnr,
int nb_jobs)
{
OverlayContext *s = ctx->priv;
const int src_w = src->width;
const int src_h = src->height;
const int dst_w = dst->width;
const int dst_h = dst->height;
blend_plane_8_8bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 0, 0, 0, x, y, main_has_alpha,
s->main_desc->comp[1].plane, s->main_desc->comp[1].offset, s->main_desc->comp[1].step, is_straight, 0,
jobnr, nb_jobs);
blend_plane_8_8bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 1, hsub, vsub, x, y, main_has_alpha,
s->main_desc->comp[2].plane, s->main_desc->comp[2].offset, s->main_desc->comp[2].step, is_straight, 0,
jobnr, nb_jobs);
blend_plane_8_8bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 2, hsub, vsub, x, y, main_has_alpha,
s->main_desc->comp[0].plane, s->main_desc->comp[0].offset, s->main_desc->comp[0].step, is_straight, 0,
jobnr, nb_jobs);
if (main_has_alpha)
alpha_composite_8_8bits(src, dst, src_w, src_h, dst_w, dst_h, x, y, jobnr, nb_jobs);
}
static int blend_slice_yuv420(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 1, 0, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuva420(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 1, 1, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuv420p10(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_16_10bits(ctx, td->dst, td->src, 1, 1, 0, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuva420p10(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_16_10bits(ctx, td->dst, td->src, 1, 1, 1, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuv422p10(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_16_10bits(ctx, td->dst, td->src, 1, 0, 0, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuva422p10(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_16_10bits(ctx, td->dst, td->src, 1, 0, 1, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuv422(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 0, 0, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuva422(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 0, 1, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuv444(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 0, 0, 0, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuva444(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 0, 0, 1, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_gbrp(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_planar_rgb(ctx, td->dst, td->src, 0, 0, 0, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_gbrap(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_planar_rgb(ctx, td->dst, td->src, 0, 0, 1, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuv420_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 1, 0, s->x, s->y, 0, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuva420_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 1, 1, s->x, s->y, 0, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuv422_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 0, 0, s->x, s->y, 0, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuva422_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 0, 1, s->x, s->y, 0, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuv444_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 0, 0, 0, s->x, s->y, 0, jobnr, nb_jobs);
return 0;
}
static int blend_slice_yuva444_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 0, 0, 1, s->x, s->y, 0, jobnr, nb_jobs);
return 0;
}
static int blend_slice_gbrp_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_planar_rgb(ctx, td->dst, td->src, 0, 0, 0, s->x, s->y, 0, jobnr, nb_jobs);
return 0;
}
static int blend_slice_gbrap_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_planar_rgb(ctx, td->dst, td->src, 0, 0, 1, s->x, s->y, 0, jobnr, nb_jobs);
return 0;
}
static int blend_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_packed_rgb(ctx, td->dst, td->src, 0, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_rgba(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_packed_rgb(ctx, td->dst, td->src, 1, s->x, s->y, 1, jobnr, nb_jobs);
return 0;
}
static int blend_slice_rgb_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_packed_rgb(ctx, td->dst, td->src, 0, s->x, s->y, 0, jobnr, nb_jobs);
return 0;
}
static int blend_slice_rgba_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
OverlayContext *s = ctx->priv;
ThreadData *td = arg;
blend_slice_packed_rgb(ctx, td->dst, td->src, 1, s->x, s->y, 0, jobnr, nb_jobs);
return 0;
}
static int config_input_main(AVFilterLink *inlink)
{
OverlayContext *s = inlink->dst->priv;
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
av_image_fill_max_pixsteps(s->main_pix_step, NULL, pix_desc);
s->hsub = pix_desc->log2_chroma_w;
s->vsub = pix_desc->log2_chroma_h;
s->main_desc = pix_desc;
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);
switch (s->format) {
case OVERLAY_FORMAT_YUV420:
s->blend_slice = s->main_has_alpha ? blend_slice_yuva420 : blend_slice_yuv420;
break;
case OVERLAY_FORMAT_YUV420P10:
s->blend_slice = s->main_has_alpha ? blend_slice_yuva420p10 : blend_slice_yuv420p10;
break;
case OVERLAY_FORMAT_YUV422:
s->blend_slice = s->main_has_alpha ? blend_slice_yuva422 : blend_slice_yuv422;
break;
case OVERLAY_FORMAT_YUV422P10:
s->blend_slice = s->main_has_alpha ? blend_slice_yuva422p10 : blend_slice_yuv422p10;
break;
case OVERLAY_FORMAT_YUV444:
s->blend_slice = s->main_has_alpha ? blend_slice_yuva444 : blend_slice_yuv444;
break;
case OVERLAY_FORMAT_RGB:
s->blend_slice = s->main_has_alpha ? blend_slice_rgba : blend_slice_rgb;
break;
case OVERLAY_FORMAT_GBRP:
s->blend_slice = s->main_has_alpha ? blend_slice_gbrap : blend_slice_gbrp;
break;
case OVERLAY_FORMAT_AUTO:
switch (inlink->format) {
case AV_PIX_FMT_YUVA420P:
s->blend_slice = blend_slice_yuva420;
break;
case AV_PIX_FMT_YUVA420P10:
s->blend_slice = blend_slice_yuva420p10;
break;
case AV_PIX_FMT_YUVA422P:
s->blend_slice = blend_slice_yuva422;
break;
case AV_PIX_FMT_YUVA422P10:
s->blend_slice = blend_slice_yuva422p10;
break;
case AV_PIX_FMT_YUVA444P:
s->blend_slice = blend_slice_yuva444;
break;
case AV_PIX_FMT_ARGB:
case AV_PIX_FMT_RGBA:
case AV_PIX_FMT_BGRA:
case AV_PIX_FMT_ABGR:
s->blend_slice = blend_slice_rgba;
break;
case AV_PIX_FMT_GBRAP:
s->blend_slice = blend_slice_gbrap;
break;
default:
av_assert0(0);
break;
}
break;
}
if (!s->alpha_format)
goto end;
switch (s->format) {
case OVERLAY_FORMAT_YUV420:
s->blend_slice = s->main_has_alpha ? blend_slice_yuva420_pm : blend_slice_yuv420_pm;
break;
case OVERLAY_FORMAT_YUV422:
s->blend_slice = s->main_has_alpha ? blend_slice_yuva422_pm : blend_slice_yuv422_pm;
break;
case OVERLAY_FORMAT_YUV444:
s->blend_slice = s->main_has_alpha ? blend_slice_yuva444_pm : blend_slice_yuv444_pm;
break;
case OVERLAY_FORMAT_RGB:
s->blend_slice = s->main_has_alpha ? blend_slice_rgba_pm : blend_slice_rgb_pm;
break;
case OVERLAY_FORMAT_GBRP:
s->blend_slice = s->main_has_alpha ? blend_slice_gbrap_pm : blend_slice_gbrp_pm;
break;
case OVERLAY_FORMAT_AUTO:
switch (inlink->format) {
case AV_PIX_FMT_YUVA420P:
s->blend_slice = blend_slice_yuva420_pm;
break;
case AV_PIX_FMT_YUVA422P:
s->blend_slice = blend_slice_yuva422_pm;
break;
case AV_PIX_FMT_YUVA444P:
s->blend_slice = blend_slice_yuva444_pm;
break;
case AV_PIX_FMT_ARGB:
case AV_PIX_FMT_RGBA:
case AV_PIX_FMT_BGRA:
case AV_PIX_FMT_ABGR:
s->blend_slice = blend_slice_rgba_pm;
break;
case AV_PIX_FMT_GBRAP:
s->blend_slice = blend_slice_gbrap_pm;
break;
default:
av_assert0(0);
break;
}
break;
}
end:
#if ARCH_X86
ff_overlay_init_x86(s, s->format, inlink->format,
s->alpha_format, s->main_has_alpha);
#endif
return 0;
}
static int do_blend(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
AVFrame *mainpic, *second;
OverlayContext *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
int ret;
ret = ff_framesync_dualinput_get_writable(fs, &mainpic, &second);
if (ret < 0)
return ret;
if (!second)
return ff_filter_frame(ctx->outputs[0], mainpic);
if (s->eval_mode == EVAL_MODE_FRAME) {
s->var_values[VAR_N] = inlink->frame_count_out;
s->var_values[VAR_T] = mainpic->pts == AV_NOPTS_VALUE ?
NAN : mainpic->pts * av_q2d(inlink->time_base);
#if FF_API_FRAME_PKT
FF_DISABLE_DEPRECATION_WARNINGS
{
int64_t pos = mainpic->pkt_pos;
s->var_values[VAR_POS] = pos == -1 ? NAN : pos;
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
s->var_values[VAR_OVERLAY_W] = s->var_values[VAR_OW] = second->width;
s->var_values[VAR_OVERLAY_H] = s->var_values[VAR_OH] = second->height;
s->var_values[VAR_MAIN_W ] = s->var_values[VAR_MW] = mainpic->width;
s->var_values[VAR_MAIN_H ] = s->var_values[VAR_MH] = mainpic->height;
eval_expr(ctx);
av_log(ctx, AV_LOG_DEBUG, "n:%f t:%f x:%f xi:%d y:%f yi:%d\n",
s->var_values[VAR_N], s->var_values[VAR_T],
s->var_values[VAR_X], s->x,
s->var_values[VAR_Y], s->y);
}
if (s->x < mainpic->width && s->x + second->width >= 0 &&
s->y < mainpic->height && s->y + second->height >= 0) {
ThreadData td;
td.dst = mainpic;
td.src = second;
ff_filter_execute(ctx, s->blend_slice, &td, NULL, FFMIN(FFMAX(1, FFMIN3(s->y + second->height, FFMIN(second->height, mainpic->height), mainpic->height - s->y)),
ff_filter_get_nb_threads(ctx)));
}
return ff_filter_frame(ctx->outputs[0], mainpic);
}
static av_cold int init(AVFilterContext *ctx)
{
OverlayContext *s = ctx->priv;
s->fs.on_event = do_blend;
return 0;
}
static int activate(AVFilterContext *ctx)
{
OverlayContext *s = ctx->priv;
return ff_framesync_activate(&s->fs);
}
#define OFFSET(x) offsetof(OverlayContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption overlay_options[] = {
{ "x", "set the x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS },
{ "y", "set the y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS },
{ "eof_action", "Action to take when encountering EOF from secondary input ",
OFFSET(fs.opt_eof_action), AV_OPT_TYPE_INT, { .i64 = EOF_ACTION_REPEAT },
EOF_ACTION_REPEAT, EOF_ACTION_PASS, .flags = FLAGS, "eof_action" },
{ "repeat", "Repeat the previous frame.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, "eof_action" },
{ "endall", "End both streams.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, "eof_action" },
{ "pass", "Pass through the main input.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS }, .flags = FLAGS, "eof_action" },
{ "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_FRAME}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
{ "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" },
{ "shortest", "force termination when the shortest input terminates", OFFSET(fs.opt_shortest), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
{ "format", "set output format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=OVERLAY_FORMAT_YUV420}, 0, OVERLAY_FORMAT_NB-1, FLAGS, "format" },
{ "yuv420", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV420}, .flags = FLAGS, .unit = "format" },
{ "yuv420p10", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV420P10}, .flags = FLAGS, .unit = "format" },
{ "yuv422", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV422}, .flags = FLAGS, .unit = "format" },
{ "yuv422p10", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV422P10}, .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" },
{ "gbrp", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_GBRP}, .flags = FLAGS, .unit = "format" },
{ "auto", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_AUTO}, .flags = FLAGS, .unit = "format" },
{ "repeatlast", "repeat overlay of the last overlay frame", OFFSET(fs.opt_repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ "alpha", "alpha format", OFFSET(alpha_format), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "alpha_format" },
{ "straight", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, .flags = FLAGS, .unit = "alpha_format" },
{ "premultiplied", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, .flags = FLAGS, .unit = "alpha_format" },
{ NULL }
};
FRAMESYNC_DEFINE_CLASS(overlay, OverlayContext, fs);
static const AVFilterPad avfilter_vf_overlay_inputs[] = {
{
.name = "main",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input_main,
},
{
.name = "overlay",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input_overlay,
},
};
static const AVFilterPad avfilter_vf_overlay_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const AVFilter ff_vf_overlay = {
.name = "overlay",
.description = NULL_IF_CONFIG_SMALL("Overlay a video source on top of the input."),
.preinit = overlay_framesync_preinit,
.init = init,
.uninit = uninit,
.priv_size = sizeof(OverlayContext),
.priv_class = &overlay_class,
.activate = activate,
.process_command = process_command,
FILTER_INPUTS(avfilter_vf_overlay_inputs),
FILTER_OUTPUTS(avfilter_vf_overlay_outputs),
FILTER_QUERY_FUNC(query_formats),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_SLICE_THREADS,
};
Reference in New Issue View Git Blame Copy Permalink