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https://github.com/nyanmisaka/ffmpeg-rockchip.git
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f304c3a729
Because the interlacing filter halves the effective framerate, we need to ensure that no CEA-708 data is lost as frames are merged. Make use of the new ccfifo mechanism to ensure that caption data is properly preserved as frames pass through the filter. Thanks to Thomas Mundt for review and noticing a couple of missed codepaths for injection on output. Thanks to Lance Wang for pointing out a memory leak. Signed-off-by: Devin Heitmueller <dheitmueller@ltnglobal.com> Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/*
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* Copyright (c) 2011 Stefano Sabatini
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* Copyright (c) 2010 Baptiste Coudurier
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* Copyright (c) 2003 Michael Zucchi <notzed@ximian.com>
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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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 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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* temporal field interlace filter, ported from MPlayer/libmpcodecs
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*/
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#ifndef AVFILTER_TINTERLACE_H
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#define AVFILTER_TINTERLACE_H
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#include "libavutil/bswap.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "drawutils.h"
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#include "avfilter.h"
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#include "ccfifo.h"
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#define TINTERLACE_FLAG_VLPF 01
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#define TINTERLACE_FLAG_CVLPF 2
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#define TINTERLACE_FLAG_EXACT_TB 4
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#define TINTERLACE_FLAG_BYPASS_IL 8
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enum VLPFilter {
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VLPF_OFF = 0,
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VLPF_LIN = 1,
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VLPF_CMP = 2,
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};
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enum TInterlaceMode {
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MODE_MERGE = 0,
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MODE_DROP_EVEN,
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MODE_DROP_ODD,
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MODE_PAD,
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MODE_INTERLEAVE_TOP,
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MODE_INTERLEAVE_BOTTOM,
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MODE_INTERLACEX2,
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MODE_MERGEX2,
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MODE_NB,
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};
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enum InterlaceScanMode {
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MODE_TFF = 0,
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MODE_BFF,
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};
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typedef struct TInterlaceContext {
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const AVClass *class;
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int mode; ///< TInterlaceMode, interlace mode selected
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AVRational preout_time_base;
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int flags; ///< flags affecting interlacing algorithm
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int lowpass; ///< legacy interlace filter lowpass mode
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int vsub; ///< chroma vertical subsampling
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AVFrame *cur;
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AVFrame *next;
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uint8_t *black_data[2][4]; ///< buffer used to fill padded lines (limited/full)
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int black_linesize[4];
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FFDrawContext draw;
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FFDrawColor color;
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const AVPixFmtDescriptor *csp;
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void (*lowpass_line)(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp,
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ptrdiff_t mref, ptrdiff_t pref, int clip_max);
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AVCCFifo *cc_fifo;
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} TInterlaceContext;
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void ff_tinterlace_init_x86(TInterlaceContext *interlace);
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#endif /* AVFILTER_TINTERLACE_H */
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