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https://github.com/librempeg/librempeg
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fa74e4aef2
The bwdif filter can use common yadif frame management if we track when a field is the first or last field in a sequence. While this information is not used by yadif, the added benefit of removing the duplicated frame management logic makes it worth tracking this state in the common code.
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/*
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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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#ifndef AVFILTER_YADIF_H
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#define AVFILTER_YADIF_H
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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enum YADIFMode {
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YADIF_MODE_SEND_FRAME = 0, ///< send 1 frame for each frame
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YADIF_MODE_SEND_FIELD = 1, ///< send 1 frame for each field
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YADIF_MODE_SEND_FRAME_NOSPATIAL = 2, ///< send 1 frame for each frame but skips spatial interlacing check
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YADIF_MODE_SEND_FIELD_NOSPATIAL = 3, ///< send 1 frame for each field but skips spatial interlacing check
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};
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enum YADIFParity {
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YADIF_PARITY_TFF = 0, ///< top field first
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YADIF_PARITY_BFF = 1, ///< bottom field first
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YADIF_PARITY_AUTO = -1, ///< auto detection
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};
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enum YADIFDeint {
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YADIF_DEINT_ALL = 0, ///< deinterlace all frames
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YADIF_DEINT_INTERLACED = 1, ///< only deinterlace frames marked as interlaced
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};
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enum YADIFCurrentField {
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YADIF_FIELD_BACK_END = -1, ///< The last frame in a sequence
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YADIF_FIELD_END = 0, ///< The first or last field in a sequence
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YADIF_FIELD_NORMAL = 1, ///< A normal field in the middle of a sequence
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};
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typedef struct YADIFContext {
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const AVClass *class;
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int mode; ///< YADIFMode
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int parity; ///< YADIFParity
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int deint; ///< YADIFDeint
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int frame_pending;
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AVFrame *cur;
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AVFrame *next;
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AVFrame *prev;
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AVFrame *out;
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void (*filter)(AVFilterContext *ctx, AVFrame *dstpic, int parity, int tff);
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/**
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* Required alignment for filter_line
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*/
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void (*filter_line)(void *dst,
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void *prev, void *cur, void *next,
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int w, int prefs, int mrefs, int parity, int mode);
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void (*filter_edges)(void *dst, void *prev, void *cur, void *next,
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int w, int prefs, int mrefs, int parity, int mode);
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const AVPixFmtDescriptor *csp;
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int eof;
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uint8_t *temp_line;
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int temp_line_size;
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/*
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* An algorithm that treats first and/or last fields in a sequence
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* differently can use this to detect those cases. It is the algorithm's
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* responsibility to set the value to YADIF_FIELD_NORMAL after processing
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* the first field.
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*/
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int current_field; ///< YADIFCurrentField
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} YADIFContext;
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void ff_yadif_init_x86(YADIFContext *yadif);
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int ff_yadif_filter_frame(AVFilterLink *link, AVFrame *frame);
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int ff_yadif_request_frame(AVFilterLink *link);
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extern const AVOption ff_yadif_options[];
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#endif /* AVFILTER_YADIF_H */
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