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Code Issues Releases Activity

avfilter/overlay_vaapi: enable expressions for overlay parameters

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Signed-off-by: softworkz <softworkz@hotmail.com>
This commit is contained in:
softworkz
2022-10-31 06:20:05 +00:00
committed by Haihao Xiang
parent ff075f5abb
commit c8050d82a9
1 changed files with 127 additions and 14 deletions
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141
libavfilter/vf_overlay_vaapi.c
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@@ -27,19 +27,106 @@
#include "formats.h"
#include "internal.h"
#include "vaapi_vpp.h"
#include "libavutil/eval.h"
enum var_name {
VAR_MAIN_IW, VAR_MW,
VAR_MAIN_IH, VAR_MH,
VAR_OVERLAY_IW,
VAR_OVERLAY_IH,
VAR_OVERLAY_X, VAR_OX,
VAR_OVERLAY_Y, VAR_OY,
VAR_OVERLAY_W, VAR_OW,
VAR_OVERLAY_H, VAR_OH,
VAR_VARS_NB
};
typedef struct OverlayVAAPIContext {
VAAPIVPPContext vpp_ctx; /**< must be the first field */
FFFrameSync fs;
int overlay_ox;
int overlay_oy;
int overlay_ow;
int overlay_oh;
double var_values[VAR_VARS_NB];
char *overlay_ox;
char *overlay_oy;
char *overlay_ow;
char *overlay_oh;
int ox;
int oy;
int ow;
int oh;
float alpha;
unsigned int blend_flags;
float blend_alpha;
} OverlayVAAPIContext;
static const char *const var_names[] = {
"main_w", "W", /* input width of the main layer */
"main_h", "H", /* input height of the main layer */
"overlay_iw", /* input width of the overlay layer */
"overlay_ih", /* input height of the overlay layer */
"overlay_x", "x", /* x position of the overlay layer inside of main */
"overlay_y", "y", /* y position of the overlay layer inside of main */
"overlay_w", "w", /* output width of overlay layer */
"overlay_h", "h", /* output height of overlay layer */
NULL
};
static int eval_expr(AVFilterContext *avctx)
{
OverlayVAAPIContext *ctx = avctx->priv;
double *var_values = ctx->var_values;
int ret = 0;
AVExpr *ox_expr = NULL, *oy_expr = NULL;
AVExpr *ow_expr = NULL, *oh_expr = NULL;
#define PARSE_EXPR(e, s) {\
ret = av_expr_parse(&(e), s, var_names, NULL, NULL, NULL, NULL, 0, ctx); \
if (ret < 0) {\
av_log(ctx, AV_LOG_ERROR, "Error when parsing '%s'.\n", s);\
goto release;\
}\
}
PARSE_EXPR(ox_expr, ctx->overlay_ox)
PARSE_EXPR(oy_expr, ctx->overlay_oy)
PARSE_EXPR(ow_expr, ctx->overlay_ow)
PARSE_EXPR(oh_expr, ctx->overlay_oh)
#undef PASS_EXPR
var_values[VAR_OVERLAY_W] =
var_values[VAR_OW] = av_expr_eval(ow_expr, var_values, NULL);
var_values[VAR_OVERLAY_H] =
var_values[VAR_OH] = av_expr_eval(oh_expr, var_values, NULL);
/* calc again in case ow is relative to oh */
var_values[VAR_OVERLAY_W] =
var_values[VAR_OW] = av_expr_eval(ow_expr, var_values, NULL);
var_values[VAR_OVERLAY_X] =
var_values[VAR_OX] = av_expr_eval(ox_expr, var_values, NULL);
var_values[VAR_OVERLAY_Y] =
var_values[VAR_OY] = av_expr_eval(oy_expr, var_values, NULL);
/* calc again in case ox is relative to oy */
var_values[VAR_OVERLAY_X] =
var_values[VAR_OX] = av_expr_eval(ox_expr, var_values, NULL);
/* calc overlay_w and overlay_h again incase relative to ox,oy */
var_values[VAR_OVERLAY_W] =
var_values[VAR_OW] = av_expr_eval(ow_expr, var_values, NULL);
var_values[VAR_OVERLAY_H] =
var_values[VAR_OH] = av_expr_eval(oh_expr, var_values, NULL);
var_values[VAR_OVERLAY_W] =
var_values[VAR_OW] = av_expr_eval(ow_expr, var_values, NULL);
release:
av_expr_free(ox_expr);
av_expr_free(oy_expr);
av_expr_free(ow_expr);
av_expr_free(oh_expr);
return ret;
}
static int overlay_vaapi_build_filter_params(AVFilterContext *avctx)
{
VAAPIVPPContext *vpp_ctx = avctx->priv;
@@ -233,10 +320,10 @@ static int overlay_vaapi_blend(FFFrameSync *fs)
input_overlay->width, input_overlay->height, input_overlay->pts);
overlay_region = (VARectangle) {
.x = ctx->overlay_ox,
.y = ctx->overlay_oy,
.width = ctx->overlay_ow ? ctx->overlay_ow : input_overlay->width,
.height = ctx->overlay_oh ? ctx->overlay_oh : input_overlay->height,
.x = ctx->ox,
.y = ctx->oy,
.width = ctx->ow ? ctx->ow : input_overlay->width,
.height = ctx->oh ? ctx->oh : input_overlay->height,
};
if (overlay_region.x + overlay_region.width > input_main->width ||
@@ -289,10 +376,36 @@ static int have_alpha_planar(AVFilterLink *link)
return !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA);
}
static int overlay_vaapi_config_input_main(AVFilterLink *inlink)
{
AVFilterContext *avctx = inlink->dst;
OverlayVAAPIContext *ctx = avctx->priv;
ctx->var_values[VAR_MAIN_IW] =
ctx->var_values[VAR_MW] = inlink->w;
ctx->var_values[VAR_MAIN_IH] =
ctx->var_values[VAR_MH] = inlink->h;
return ff_vaapi_vpp_config_input(inlink);
}
static int overlay_vaapi_config_input_overlay(AVFilterLink *inlink)
{
AVFilterContext *avctx = inlink->dst;
OverlayVAAPIContext *ctx = avctx->priv;
int ret;
ctx->var_values[VAR_OVERLAY_IW] = inlink->w;
ctx->var_values[VAR_OVERLAY_IH] = inlink->h;
ret = eval_expr(avctx);
if (ret < 0)
return ret;
ctx->ox = (int)ctx->var_values[VAR_OX];
ctx->oy = (int)ctx->var_values[VAR_OY];
ctx->ow = (int)ctx->var_values[VAR_OW];
ctx->oh = (int)ctx->var_values[VAR_OH];
ctx->blend_flags = 0;
ctx->blend_alpha = 1.0f;
@@ -365,11 +478,11 @@ static av_cold void overlay_vaapi_uninit(AVFilterContext *avctx)
#define OFFSET(x) offsetof(OverlayVAAPIContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption overlay_vaapi_options[] = {
{ "x", "Overlay x position", OFFSET(overlay_ox), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
{ "y", "Overlay y position", OFFSET(overlay_oy), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
{ "w", "Overlay width", OFFSET(overlay_ow), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
{ "h", "Overlay height", OFFSET(overlay_oh), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
{ "alpha", "Overlay global alpha", OFFSET(alpha), AV_OPT_TYPE_FLOAT, { .dbl = 1.0 }, 0.0, 1.0, .flags = FLAGS },
{ "x", "Overlay x position", OFFSET(overlay_ox), AV_OPT_TYPE_STRING, { .str="0"}, 0, 255, .flags = FLAGS},
{ "y", "Overlay y position", OFFSET(overlay_oy), AV_OPT_TYPE_STRING, { .str="0"}, 0, 255, .flags = FLAGS},
{ "w", "Overlay width", OFFSET(overlay_ow), AV_OPT_TYPE_STRING, { .str="overlay_iw"}, 0, 255, .flags = FLAGS},
{ "h", "Overlay height", OFFSET(overlay_oh), AV_OPT_TYPE_STRING, { .str="overlay_ih*w/overlay_iw"}, 0, 255, .flags = FLAGS},
{ "alpha", "Overlay global alpha", OFFSET(alpha), AV_OPT_TYPE_FLOAT, { .dbl = 1.0 }, 0.0, 1.0, .flags = 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" },
@@ -387,7 +500,7 @@ static const AVFilterPad overlay_vaapi_inputs[] = {
{
.name = "main",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &ff_vaapi_vpp_config_input,
.config_props = overlay_vaapi_config_input_main,
},
{
.name = "overlay",