aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* 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
*/
#ifndef AVFILTER_OVERLAY_H
#define AVFILTER_OVERLAY_H
#include "libavutil/eval.h"
#include "libavutil/pixdesc.h"
#include "framesync.h"
#include "avfilter.h"
enum var_name {
VAR_MAIN_W, VAR_MW,
VAR_MAIN_H, VAR_MH,
VAR_OVERLAY_W, VAR_OW,
VAR_OVERLAY_H, VAR_OH,
VAR_HSUB,
VAR_VSUB,
VAR_X,
VAR_Y,
VAR_N,
VAR_POS,
VAR_T,
VAR_VARS_NB
};
enum OverlayFormat {
OVERLAY_FORMAT_YUV420,
OVERLAY_FORMAT_YUV422,
OVERLAY_FORMAT_YUV444,
OVERLAY_FORMAT_RGB,
OVERLAY_FORMAT_GBRP,
OVERLAY_FORMAT_AUTO,
OVERLAY_FORMAT_NB
};
typedef struct OverlayContext {
const AVClass *class;
int x, y; ///< position of overlaid picture
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;
int format; ///< OverlayFormat
int alpha_format;
int eval_mode; ///< EvalMode
FFFrameSync fs;
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
int hsub, vsub; ///< chroma subsampling values
const AVPixFmtDescriptor *main_desc; ///< format descriptor for main input
double var_values[VAR_VARS_NB];
char *x_expr, *y_expr;
AVExpr *x_pexpr, *y_pexpr;
int (*blend_row[4])(uint8_t *d, uint8_t *da, uint8_t *s, uint8_t *a, int w,
ptrdiff_t alinesize);
int (*blend_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} OverlayContext;
void ff_overlay_init_x86(OverlayContext *s, int format, int pix_format,
int alpha_format, int main_has_alpha);
#endif /* AVFILTER_OVERLAY_H */
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