#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
+#include "libavutil/eval.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
+static const char * const var_names[] = {
+ "x",
+ "y",
+ "w",
+ "h",
+ "n", ///< number of frame
+ "t", ///< timestamp expressed in seconds
+ NULL
+};
+
+enum var_name {
+ VAR_X,
+ VAR_Y,
+ VAR_W,
+ VAR_H,
+ VAR_N,
+ VAR_T,
+ VAR_VARS_NB
+};
+
+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 parsing the expression '%s' for %s\n",
+ expr, option);
+ *pexpr = old;
+ return ret;
+ }
+
+ av_expr_free(old);
+ return 0;
+}
+
/**
* Apply a simple delogo algorithm to the image in src and put the
botleft[x-logo_x1-1] +
botleft[x-logo_x1+1]) * weightb;
weight = (weightl + weightr + weightt + weightb) * 3U;
- interp = ROUNDED_DIV(interp, weight);
+ interp = (interp + (weight >> 1)) / weight;
if (y >= logo_y+band && y < logo_y+logo_h-band &&
x >= logo_x+band && x < logo_x+logo_w-band) {
typedef struct DelogoContext {
const AVClass *class;
int x, y, w, h, band, show;
+ char *x_expr, *y_expr, *w_expr, *h_expr;
+ AVExpr *x_pexpr, *y_pexpr, *w_pexpr, *h_pexpr;
+ double var_values[VAR_VARS_NB];
} DelogoContext;
#define OFFSET(x) offsetof(DelogoContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption delogo_options[]= {
- { "x", "set logo x position", OFFSET(x), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
- { "y", "set logo y position", OFFSET(y), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
- { "w", "set logo width", OFFSET(w), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
- { "h", "set logo height", OFFSET(h), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
-#if LIBAVFILTER_VERSION_MAJOR < 7
- /* Actual default value for band/t is 1, set in init */
- { "band", "set delogo area band size", OFFSET(band), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
- { "t", "set delogo area band size", OFFSET(band), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
-#endif
- { "show", "show delogo area", OFFSET(show), AV_OPT_TYPE_BOOL,{ .i64 = 0 }, 0, 1, FLAGS },
+ { "x", "set logo x position", OFFSET(x_expr), AV_OPT_TYPE_STRING, { .str = "-1" }, 0, 0, FLAGS },
+ { "y", "set logo y position", OFFSET(y_expr), AV_OPT_TYPE_STRING, { .str = "-1" }, 0, 0, FLAGS },
+ { "w", "set logo width", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str = "-1" }, 0, 0, FLAGS },
+ { "h", "set logo height", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str = "-1" }, 0, 0, FLAGS },
+ { "show", "show delogo area", OFFSET(show), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(delogo);
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ DelogoContext *s = ctx->priv;
+
+ av_expr_free(s->x_pexpr); s->x_pexpr = NULL;
+ av_expr_free(s->y_pexpr); s->y_pexpr = NULL;
+ av_expr_free(s->w_pexpr); s->w_pexpr = NULL;
+ av_expr_free(s->h_pexpr); s->h_pexpr = NULL;
+}
+
static int query_formats(AVFilterContext *ctx)
{
static av_cold int init(AVFilterContext *ctx)
{
DelogoContext *s = ctx->priv;
+ int ret = 0;
+
+ 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 ||
+ (ret = set_expr(&s->w_pexpr, s->w_expr, "w", ctx)) < 0 ||
+ (ret = set_expr(&s->h_pexpr, s->h_expr, "h", ctx)) < 0 )
+ return ret;
+
+ s->x = av_expr_eval(s->x_pexpr, s->var_values, s);
+ s->y = av_expr_eval(s->y_pexpr, s->var_values, s);
+ s->w = av_expr_eval(s->w_pexpr, s->var_values, s);
+ s->h = av_expr_eval(s->h_pexpr, s->var_values, s);
#define CHECK_UNSET_OPT(opt) \
if (s->opt == -1) { \
CHECK_UNSET_OPT(w);
CHECK_UNSET_OPT(h);
-#if LIBAVFILTER_VERSION_MAJOR < 7
- if (s->band == 0) { /* Unset, use default */
- av_log(ctx, AV_LOG_WARNING, "Note: default band value was changed from 4 to 1.\n");
- s->band = 1;
- } else if (s->band != 1) {
- av_log(ctx, AV_LOG_WARNING, "Option band is deprecated.\n");
- }
-#else
s->band = 1;
-#endif
+
av_log(ctx, AV_LOG_VERBOSE, "x:%d y:%d, w:%d h:%d band:%d show:%d\n",
s->x, s->y, s->w, s->h, s->band, s->show);
int direct = 0;
int plane;
AVRational sar;
+ int ret;
+
+ s->var_values[VAR_N] = inlink->frame_count_out;
+ s->var_values[VAR_T] = TS2T(in->pts, inlink->time_base);
+ s->x = av_expr_eval(s->x_pexpr, s->var_values, s);
+ s->y = av_expr_eval(s->y_pexpr, s->var_values, s);
+ s->w = av_expr_eval(s->w_pexpr, s->var_values, s);
+ s->h = av_expr_eval(s->h_pexpr, s->var_values, s);
+
+ if (s->x + (s->band - 1) <= 0 || s->x + s->w - (s->band*2 - 2) > inlink->w ||
+ s->y + (s->band - 1) <= 0 || s->y + s->h - (s->band*2 - 2) > inlink->h) {
+ av_log(s, AV_LOG_WARNING, "Logo area is outside of the frame,"
+ " auto set the area inside of the frame\n");
+ }
+
+ if (s->x + (s->band - 1) <= 0)
+ s->x = 1 + s->band;
+ if (s->y + (s->band - 1) <= 0)
+ s->y = 1 + s->band;
+ if (s->x + s->w - (s->band*2 - 2) > inlink->w)
+ s->w = inlink->w - s->x - (s->band*2 - 2);
+ if (s->y + s->h - (s->band*2 - 2) > inlink->h)
+ s->h = inlink->h - s->y - (s->band*2 - 2);
+
+ ret = config_input(inlink);
+ if (ret < 0) {
+ av_frame_free(&in);
+ return ret;
+ }
+
+ s->w += s->band*2;
+ s->h += s->band*2;
+ s->x -= s->band;
+ s->y -= s->band;
if (av_frame_is_writable(in)) {
direct = 1;
{ NULL }
};
-AVFilter ff_vf_delogo = {
+const AVFilter ff_vf_delogo = {
.name = "delogo",
.description = NULL_IF_CONFIG_SMALL("Remove logo from input video."),
.priv_size = sizeof(DelogoContext),
.priv_class = &delogo_class,
.init = init,
+ .uninit = uninit,
.query_formats = query_formats,
.inputs = avfilter_vf_delogo_inputs,
.outputs = avfilter_vf_delogo_outputs,
projects / ffmpeg / blobdiff