640 lines
23 KiB
C
640 lines
23 KiB
C
/*
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* Copyright (c) 2010 Stefano Sabatini
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* Copyright (c) 2010 Baptiste Coudurier
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* Copyright (c) 2007 Bobby Bingham
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* overlay one video on top of another
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*/
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#include "avfilter.h"
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#include "formats.h"
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#include "libavutil/common.h"
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#include "libavutil/eval.h"
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#include "libavutil/avstring.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/opt.h"
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#include "internal.h"
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#include "dualinput.h"
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#include "drawutils.h"
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#include "video.h"
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static const char *const var_names[] = {
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"main_w", "W", ///< width of the main video
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"main_h", "H", ///< height of the main video
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"overlay_w", "w", ///< width of the overlay video
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"overlay_h", "h", ///< height of the overlay video
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"hsub",
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"vsub",
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"x",
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"y",
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"n", ///< number of frame
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"pos", ///< position in the file
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"t", ///< timestamp expressed in seconds
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NULL
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};
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enum var_name {
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VAR_MAIN_W, VAR_MW,
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VAR_MAIN_H, VAR_MH,
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VAR_OVERLAY_W, VAR_OW,
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VAR_OVERLAY_H, VAR_OH,
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VAR_HSUB,
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VAR_VSUB,
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VAR_X,
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VAR_Y,
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VAR_N,
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VAR_POS,
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VAR_T,
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VAR_VARS_NB
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};
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#define MAIN 0
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#define OVERLAY 1
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#define R 0
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#define G 1
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#define B 2
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#define A 3
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#define Y 0
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#define U 1
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#define V 2
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typedef struct {
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const AVClass *class;
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int x, y; ///< position of overlayed picture
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int allow_packed_rgb;
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uint8_t main_is_packed_rgb;
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uint8_t main_rgba_map[4];
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uint8_t main_has_alpha;
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uint8_t overlay_is_packed_rgb;
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uint8_t overlay_rgba_map[4];
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uint8_t overlay_has_alpha;
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enum OverlayFormat { OVERLAY_FORMAT_YUV420, OVERLAY_FORMAT_YUV444, OVERLAY_FORMAT_RGB, OVERLAY_FORMAT_NB} format;
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enum EvalMode { EVAL_MODE_INIT, EVAL_MODE_FRAME, EVAL_MODE_NB } eval_mode;
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FFDualInputContext dinput;
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int main_pix_step[4]; ///< steps per pixel for each plane of the main output
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int overlay_pix_step[4]; ///< steps per pixel for each plane of the overlay
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int hsub, vsub; ///< chroma subsampling values
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double var_values[VAR_VARS_NB];
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char *x_expr, *y_expr;
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AVExpr *x_pexpr, *y_pexpr;
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} OverlayContext;
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static av_cold void uninit(AVFilterContext *ctx)
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{
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OverlayContext *s = ctx->priv;
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ff_dualinput_uninit(&s->dinput);
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av_expr_free(s->x_pexpr); s->x_pexpr = NULL;
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av_expr_free(s->y_pexpr); s->y_pexpr = NULL;
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}
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static inline int normalize_xy(double d, int chroma_sub)
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{
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if (isnan(d))
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return INT_MAX;
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return (int)d & ~((1 << chroma_sub) - 1);
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}
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static void eval_expr(AVFilterContext *ctx)
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{
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OverlayContext *s = ctx->priv;
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s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
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s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, NULL);
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s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
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s->x = normalize_xy(s->var_values[VAR_X], s->hsub);
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s->y = normalize_xy(s->var_values[VAR_Y], s->vsub);
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}
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static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
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{
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int ret;
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AVExpr *old = NULL;
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if (*pexpr)
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old = *pexpr;
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ret = av_expr_parse(pexpr, expr, var_names,
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NULL, NULL, NULL, NULL, 0, log_ctx);
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if (ret < 0) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Error when evaluating the expression '%s' for %s\n",
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expr, option);
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*pexpr = old;
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return ret;
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}
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av_expr_free(old);
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return 0;
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}
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static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
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char *res, int res_len, int flags)
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{
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OverlayContext *s = ctx->priv;
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int ret;
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if (!strcmp(cmd, "x"))
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ret = set_expr(&s->x_pexpr, args, cmd, ctx);
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else if (!strcmp(cmd, "y"))
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ret = set_expr(&s->y_pexpr, args, cmd, ctx);
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else
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ret = AVERROR(ENOSYS);
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if (ret < 0)
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return ret;
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if (s->eval_mode == EVAL_MODE_INIT) {
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eval_expr(ctx);
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av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n",
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s->var_values[VAR_X], s->x,
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s->var_values[VAR_Y], s->y);
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}
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return ret;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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OverlayContext *s = ctx->priv;
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/* overlay formats contains alpha, for avoiding conversion with alpha information loss */
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static const enum AVPixelFormat main_pix_fmts_yuv420[] = {
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_NONE
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};
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static const enum AVPixelFormat overlay_pix_fmts_yuv420[] = {
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AV_PIX_FMT_YUVA420P, AV_PIX_FMT_NONE
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};
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static const enum AVPixelFormat main_pix_fmts_yuv444[] = {
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE
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};
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static const enum AVPixelFormat overlay_pix_fmts_yuv444[] = {
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE
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};
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static const enum AVPixelFormat main_pix_fmts_rgb[] = {
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AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
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AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
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AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
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AV_PIX_FMT_NONE
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};
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static const enum AVPixelFormat overlay_pix_fmts_rgb[] = {
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AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
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AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
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AV_PIX_FMT_NONE
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};
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AVFilterFormats *main_formats;
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AVFilterFormats *overlay_formats;
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switch (s->format) {
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case OVERLAY_FORMAT_YUV420:
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main_formats = ff_make_format_list(main_pix_fmts_yuv420);
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overlay_formats = ff_make_format_list(overlay_pix_fmts_yuv420);
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break;
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case OVERLAY_FORMAT_YUV444:
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main_formats = ff_make_format_list(main_pix_fmts_yuv444);
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overlay_formats = ff_make_format_list(overlay_pix_fmts_yuv444);
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break;
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case OVERLAY_FORMAT_RGB:
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main_formats = ff_make_format_list(main_pix_fmts_rgb);
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overlay_formats = ff_make_format_list(overlay_pix_fmts_rgb);
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break;
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default:
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av_assert0(0);
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}
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ff_formats_ref(main_formats, &ctx->inputs [MAIN ]->out_formats);
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ff_formats_ref(overlay_formats, &ctx->inputs [OVERLAY]->out_formats);
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ff_formats_ref(main_formats, &ctx->outputs[MAIN ]->in_formats );
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return 0;
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}
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static const enum AVPixelFormat alpha_pix_fmts[] = {
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AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA444P,
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AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_RGBA,
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AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE
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};
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static int config_input_main(AVFilterLink *inlink)
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{
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OverlayContext *s = inlink->dst->priv;
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const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
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av_image_fill_max_pixsteps(s->main_pix_step, NULL, pix_desc);
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s->hsub = pix_desc->log2_chroma_w;
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s->vsub = pix_desc->log2_chroma_h;
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s->main_is_packed_rgb =
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ff_fill_rgba_map(s->main_rgba_map, inlink->format) >= 0;
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s->main_has_alpha = ff_fmt_is_in(inlink->format, alpha_pix_fmts);
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return 0;
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}
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static int config_input_overlay(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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OverlayContext *s = inlink->dst->priv;
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int ret;
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const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
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av_image_fill_max_pixsteps(s->overlay_pix_step, NULL, pix_desc);
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/* Finish the configuration by evaluating the expressions
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now when both inputs are configured. */
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s->var_values[VAR_MAIN_W ] = s->var_values[VAR_MW] = ctx->inputs[MAIN ]->w;
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s->var_values[VAR_MAIN_H ] = s->var_values[VAR_MH] = ctx->inputs[MAIN ]->h;
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s->var_values[VAR_OVERLAY_W] = s->var_values[VAR_OW] = ctx->inputs[OVERLAY]->w;
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s->var_values[VAR_OVERLAY_H] = s->var_values[VAR_OH] = ctx->inputs[OVERLAY]->h;
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s->var_values[VAR_HSUB] = 1<<pix_desc->log2_chroma_w;
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s->var_values[VAR_VSUB] = 1<<pix_desc->log2_chroma_h;
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s->var_values[VAR_X] = NAN;
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s->var_values[VAR_Y] = NAN;
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s->var_values[VAR_N] = 0;
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s->var_values[VAR_T] = NAN;
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s->var_values[VAR_POS] = NAN;
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if ((ret = set_expr(&s->x_pexpr, s->x_expr, "x", ctx)) < 0 ||
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(ret = set_expr(&s->y_pexpr, s->y_expr, "y", ctx)) < 0)
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return ret;
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s->overlay_is_packed_rgb =
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ff_fill_rgba_map(s->overlay_rgba_map, inlink->format) >= 0;
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s->overlay_has_alpha = ff_fmt_is_in(inlink->format, alpha_pix_fmts);
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if (s->eval_mode == EVAL_MODE_INIT) {
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eval_expr(ctx);
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av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n",
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s->var_values[VAR_X], s->x,
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s->var_values[VAR_Y], s->y);
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}
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av_log(ctx, AV_LOG_VERBOSE,
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"main w:%d h:%d fmt:%s overlay w:%d h:%d fmt:%s\n",
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ctx->inputs[MAIN]->w, ctx->inputs[MAIN]->h,
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av_get_pix_fmt_name(ctx->inputs[MAIN]->format),
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ctx->inputs[OVERLAY]->w, ctx->inputs[OVERLAY]->h,
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av_get_pix_fmt_name(ctx->inputs[OVERLAY]->format));
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return 0;
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}
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static int config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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outlink->w = ctx->inputs[MAIN]->w;
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outlink->h = ctx->inputs[MAIN]->h;
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outlink->time_base = ctx->inputs[MAIN]->time_base;
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return 0;
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}
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// divide by 255 and round to nearest
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// apply a fast variant: (X+127)/255 = ((X+127)*257+257)>>16 = ((X+128)*257)>>16
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#define FAST_DIV255(x) ((((x) + 128) * 257) >> 16)
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// calculate the unpremultiplied alpha, applying the general equation:
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// alpha = alpha_overlay / ( (alpha_main + alpha_overlay) - (alpha_main * alpha_overlay) )
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// (((x) << 16) - ((x) << 9) + (x)) is a faster version of: 255 * 255 * x
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// ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)) is a faster version of: 255 * (x + y)
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#define UNPREMULTIPLY_ALPHA(x, y) ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)))
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/**
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* Blend image in src to destination buffer dst at position (x, y).
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*/
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static void blend_image(AVFilterContext *ctx,
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AVFrame *dst, const AVFrame *src,
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int x, int y)
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{
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OverlayContext *s = ctx->priv;
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int i, imax, j, jmax, k, kmax;
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const int src_w = src->width;
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const int src_h = src->height;
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const int dst_w = dst->width;
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const int dst_h = dst->height;
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if (x >= dst_w || x+dst_w < 0 ||
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y >= dst_h || y+dst_h < 0)
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return; /* no intersection */
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if (s->main_is_packed_rgb) {
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uint8_t alpha; ///< the amount of overlay to blend on to main
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const int dr = s->main_rgba_map[R];
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const int dg = s->main_rgba_map[G];
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const int db = s->main_rgba_map[B];
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const int da = s->main_rgba_map[A];
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const int dstep = s->main_pix_step[0];
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const int sr = s->overlay_rgba_map[R];
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const int sg = s->overlay_rgba_map[G];
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const int sb = s->overlay_rgba_map[B];
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const int sa = s->overlay_rgba_map[A];
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const int sstep = s->overlay_pix_step[0];
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const int main_has_alpha = s->main_has_alpha;
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uint8_t *s, *sp, *d, *dp;
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i = FFMAX(-y, 0);
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sp = src->data[0] + i * src->linesize[0];
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dp = dst->data[0] + (y+i) * dst->linesize[0];
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for (imax = FFMIN(-y + dst_h, src_h); i < imax; i++) {
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j = FFMAX(-x, 0);
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s = sp + j * sstep;
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d = dp + (x+j) * dstep;
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for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) {
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alpha = s[sa];
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// if the main channel has an alpha channel, alpha has to be calculated
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// to create an un-premultiplied (straight) alpha value
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if (main_has_alpha && alpha != 0 && alpha != 255) {
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uint8_t alpha_d = d[da];
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alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d);
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}
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switch (alpha) {
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case 0:
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break;
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case 255:
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d[dr] = s[sr];
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d[dg] = s[sg];
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d[db] = s[sb];
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break;
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default:
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// main_value = main_value * (1 - alpha) + overlay_value * alpha
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// since alpha is in the range 0-255, the result must divided by 255
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d[dr] = FAST_DIV255(d[dr] * (255 - alpha) + s[sr] * alpha);
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d[dg] = FAST_DIV255(d[dg] * (255 - alpha) + s[sg] * alpha);
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d[db] = FAST_DIV255(d[db] * (255 - alpha) + s[sb] * alpha);
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}
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if (main_has_alpha) {
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switch (alpha) {
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case 0:
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break;
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case 255:
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d[da] = s[sa];
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break;
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default:
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// apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha
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d[da] += FAST_DIV255((255 - d[da]) * s[sa]);
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}
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}
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d += dstep;
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s += sstep;
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}
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dp += dst->linesize[0];
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sp += src->linesize[0];
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}
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} else {
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const int main_has_alpha = s->main_has_alpha;
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if (main_has_alpha) {
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uint8_t alpha; ///< the amount of overlay to blend on to main
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uint8_t *s, *sa, *d, *da;
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i = FFMAX(-y, 0);
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sa = src->data[3] + i * src->linesize[3];
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da = dst->data[3] + (y+i) * dst->linesize[3];
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for (imax = FFMIN(-y + dst_h, src_h); i < imax; i++) {
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j = FFMAX(-x, 0);
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s = sa + j;
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d = da + x+j;
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for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) {
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alpha = *s;
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if (alpha != 0 && alpha != 255) {
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uint8_t alpha_d = *d;
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alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d);
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}
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switch (alpha) {
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case 0:
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break;
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case 255:
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*d = *s;
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break;
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default:
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// apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha
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*d += FAST_DIV255((255 - *d) * *s);
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}
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d += 1;
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s += 1;
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}
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da += dst->linesize[3];
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sa += src->linesize[3];
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}
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}
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for (i = 0; i < 3; i++) {
|
|
int hsub = i ? s->hsub : 0;
|
|
int vsub = i ? s->vsub : 0;
|
|
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);
|
|
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++) {
|
|
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 != 255) {
|
|
// average alpha for color components, improve quality
|
|
uint8_t alpha_d;
|
|
if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) {
|
|
alpha_d = (d[0] + d[src->linesize[3]] +
|
|
d[1] + d[src->linesize[3]+1]) >> 2;
|
|
} else if (hsub || vsub) {
|
|
alpha_h = hsub && k+1 < src_wp ?
|
|
(d[0] + d[1]) >> 1 : d[0];
|
|
alpha_v = vsub && j+1 < src_hp ?
|
|
(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);
|
|
}
|
|
*d = FAST_DIV255(*d * (255 - alpha) + *s * alpha);
|
|
s++;
|
|
d++;
|
|
a += 1 << hsub;
|
|
}
|
|
dp += dst->linesize[i];
|
|
sp += src->linesize[i];
|
|
ap += (1 << vsub) * src->linesize[3];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static AVFrame *do_blend(AVFilterContext *ctx, AVFrame *mainpic,
|
|
const AVFrame *second)
|
|
{
|
|
OverlayContext *s = ctx->priv;
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
|
|
/* TODO: reindent */
|
|
if (s->eval_mode == EVAL_MODE_FRAME) {
|
|
int64_t pos = av_frame_get_pkt_pos(mainpic);
|
|
|
|
s->var_values[VAR_N] = inlink->frame_count;
|
|
s->var_values[VAR_T] = mainpic->pts == AV_NOPTS_VALUE ?
|
|
NAN : mainpic->pts * av_q2d(inlink->time_base);
|
|
s->var_values[VAR_POS] = pos == -1 ? NAN : pos;
|
|
|
|
eval_expr(ctx);
|
|
av_log(ctx, AV_LOG_DEBUG, "n:%f t:%f pos:%f x:%f xi:%d y:%f yi:%d\n",
|
|
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);
|
|
}
|
|
|
|
blend_image(ctx, mainpic, second, s->x, s->y);
|
|
return mainpic;
|
|
}
|
|
|
|
static int filter_frame_main(AVFilterLink *inlink, AVFrame *inpicref)
|
|
{
|
|
OverlayContext *s = inlink->dst->priv;
|
|
return ff_dualinput_filter_frame_main(&s->dinput, inlink, inpicref);
|
|
}
|
|
|
|
static int filter_frame_over(AVFilterLink *inlink, AVFrame *inpicref)
|
|
{
|
|
OverlayContext *s = inlink->dst->priv;
|
|
return ff_dualinput_filter_frame_second(&s->dinput, inlink, inpicref);
|
|
}
|
|
|
|
static int request_frame(AVFilterLink *outlink)
|
|
{
|
|
OverlayContext *s = outlink->src->priv;
|
|
return ff_dualinput_request_frame(&s->dinput, outlink);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#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"}, 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" },
|
|
{ "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" },
|
|
{ "rgb", "force packed RGB in input and output (deprecated)", OFFSET(allow_packed_rgb), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
|
|
{ "shortest", "force termination when the shortest input terminates", OFFSET(dinput.shortest), AV_OPT_TYPE_INT, { .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" },
|
|
{ "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" },
|
|
{ "repeatlast", "repeat overlay of the last overlay frame", OFFSET(dinput.repeatlast), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(overlay);
|
|
|
|
static const AVFilterPad avfilter_vf_overlay_inputs[] = {
|
|
{
|
|
.name = "main",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_input_main,
|
|
.filter_frame = filter_frame_main,
|
|
.needs_writable = 1,
|
|
},
|
|
{
|
|
.name = "overlay",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_input_overlay,
|
|
.filter_frame = filter_frame_over,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad avfilter_vf_overlay_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
.request_frame = request_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
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),
|
|
.priv_class = &overlay_class,
|
|
.query_formats = query_formats,
|
|
.process_command = process_command,
|
|
.inputs = avfilter_vf_overlay_inputs,
|
|
.outputs = avfilter_vf_overlay_outputs,
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
|
|
};
|