528 lines
23 KiB
C
528 lines
23 KiB
C
/*
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* Copyright (c) 2017 Thomas Mundt <tmundt75@gmail.com>
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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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#include "libavutil/opt.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/avassert.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "tinterlace.h"
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#define OFFSET(x) offsetof(TInterlaceContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption tinterlace_options[] = {
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{"mode", "select interlace mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_MERGE}, 0, MODE_NB-1, FLAGS, "mode"},
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{"merge", "merge fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MERGE}, INT_MIN, INT_MAX, FLAGS, "mode"},
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{"drop_even", "drop even fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_EVEN}, INT_MIN, INT_MAX, FLAGS, "mode"},
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{"drop_odd", "drop odd fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_ODD}, INT_MIN, INT_MAX, FLAGS, "mode"},
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{"pad", "pad alternate lines with black", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PAD}, INT_MIN, INT_MAX, FLAGS, "mode"},
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{"interleave_top", "interleave top and bottom fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_TOP}, INT_MIN, INT_MAX, FLAGS, "mode"},
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{"interleave_bottom", "interleave bottom and top fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_BOTTOM}, INT_MIN, INT_MAX, FLAGS, "mode"},
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{"interlacex2", "interlace fields from two consecutive frames", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLACEX2}, INT_MIN, INT_MAX, FLAGS, "mode"},
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{"mergex2", "merge fields keeping same frame rate", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MERGEX2}, INT_MIN, INT_MAX, FLAGS, "mode"},
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{"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX, 0, "flags" },
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{"low_pass_filter", "enable vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" },
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{"vlpf", "enable vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" },
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{"complex_filter", "enable complex vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_CVLPF},INT_MIN, INT_MAX, FLAGS, "flags" },
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{"cvlpf", "enable complex vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_CVLPF},INT_MIN, INT_MAX, FLAGS, "flags" },
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{"exact_tb", "force a timebase which can represent timestamps exactly", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_EXACT_TB}, INT_MIN, INT_MAX, FLAGS, "flags" },
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{NULL}
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};
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AVFILTER_DEFINE_CLASS(tinterlace);
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#define FULL_SCALE_YUVJ_FORMATS \
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AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P
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static const enum AVPixelFormat full_scale_yuvj_pix_fmts[] = {
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FULL_SCALE_YUVJ_FORMATS, AV_PIX_FMT_NONE
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};
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static const AVRational standard_tbs[] = {
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{1, 25},
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{1, 30},
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{1001, 30000},
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};
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
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AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
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AV_PIX_FMT_YUV420P10LE, AV_PIX_FMT_YUV422P10LE,
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AV_PIX_FMT_YUV440P10LE, AV_PIX_FMT_YUV444P10LE,
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AV_PIX_FMT_YUV420P12LE, AV_PIX_FMT_YUV422P12LE,
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AV_PIX_FMT_YUV440P12LE, AV_PIX_FMT_YUV444P12LE,
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AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
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AV_PIX_FMT_YUVA420P10LE, AV_PIX_FMT_YUVA422P10LE, AV_PIX_FMT_YUVA444P10LE,
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AV_PIX_FMT_GRAY8, FULL_SCALE_YUVJ_FORMATS,
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AV_PIX_FMT_NONE
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};
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AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
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if (!fmts_list)
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return AVERROR(ENOMEM);
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return ff_set_common_formats(ctx, fmts_list);
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}
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static void lowpass_line_c(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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{
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const uint8_t *srcp_above = srcp + mref;
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const uint8_t *srcp_below = srcp + pref;
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int i;
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for (i = 0; i < width; i++) {
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// this calculation is an integer representation of
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// '0.5 * current + 0.25 * above + 0.25 * below'
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// '1 +' is for rounding.
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dstp[i] = (1 + srcp[i] + srcp[i] + srcp_above[i] + srcp_below[i]) >> 2;
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}
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}
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static void lowpass_line_c_16(uint8_t *dst8, ptrdiff_t width, const uint8_t *src8,
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ptrdiff_t mref, ptrdiff_t pref, int clip_max)
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{
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uint16_t *dstp = (uint16_t *)dst8;
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const uint16_t *srcp = (const uint16_t *)src8;
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const uint16_t *srcp_above = srcp + mref / 2;
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const uint16_t *srcp_below = srcp + pref / 2;
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int i, src_x;
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for (i = 0; i < width; i++) {
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// this calculation is an integer representation of
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// '0.5 * current + 0.25 * above + 0.25 * below'
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// '1 +' is for rounding.
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src_x = av_le2ne16(srcp[i]) << 1;
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dstp[i] = av_le2ne16((1 + src_x + av_le2ne16(srcp_above[i])
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+ av_le2ne16(srcp_below[i])) >> 2);
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}
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}
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static void lowpass_line_complex_c(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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{
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const uint8_t *srcp_above = srcp + mref;
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const uint8_t *srcp_below = srcp + pref;
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const uint8_t *srcp_above2 = srcp + mref * 2;
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const uint8_t *srcp_below2 = srcp + pref * 2;
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int i, src_x, src_ab;
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for (i = 0; i < width; i++) {
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// this calculation is an integer representation of
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// '0.75 * current + 0.25 * above + 0.25 * below - 0.125 * above2 - 0.125 * below2'
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// '4 +' is for rounding.
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src_x = srcp[i] << 1;
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src_ab = srcp_above[i] + srcp_below[i];
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dstp[i] = av_clip_uint8((4 + ((srcp[i] + src_x + src_ab) << 1)
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- srcp_above2[i] - srcp_below2[i]) >> 3);
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// Prevent over-sharpening:
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// dst must not exceed src when the average of above and below
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// is less than src. And the other way around.
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if (src_ab > src_x) {
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if (dstp[i] < srcp[i])
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dstp[i] = srcp[i];
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} else if (dstp[i] > srcp[i])
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dstp[i] = srcp[i];
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}
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}
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static void lowpass_line_complex_c_16(uint8_t *dst8, ptrdiff_t width, const uint8_t *src8,
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ptrdiff_t mref, ptrdiff_t pref, int clip_max)
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{
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uint16_t *dstp = (uint16_t *)dst8;
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const uint16_t *srcp = (const uint16_t *)src8;
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const uint16_t *srcp_above = srcp + mref / 2;
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const uint16_t *srcp_below = srcp + pref / 2;
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const uint16_t *srcp_above2 = srcp + mref;
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const uint16_t *srcp_below2 = srcp + pref;
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int i, dst_le, src_le, src_x, src_ab;
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for (i = 0; i < width; i++) {
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// this calculation is an integer representation of
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// '0.75 * current + 0.25 * above + 0.25 * below - 0.125 * above2 - 0.125 * below2'
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// '4 +' is for rounding.
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src_le = av_le2ne16(srcp[i]);
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src_x = src_le << 1;
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src_ab = av_le2ne16(srcp_above[i]) + av_le2ne16(srcp_below[i]);
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dst_le = av_clip((4 + ((src_le + src_x + src_ab) << 1)
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- av_le2ne16(srcp_above2[i])
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- av_le2ne16(srcp_below2[i])) >> 3, 0, clip_max);
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// Prevent over-sharpening:
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// dst must not exceed src when the average of above and below
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// is less than src. And the other way around.
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if (src_ab > src_x) {
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if (dst_le < src_le)
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dstp[i] = av_le2ne16(src_le);
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else
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dstp[i] = av_le2ne16(dst_le);
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} else if (dst_le > src_le) {
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dstp[i] = av_le2ne16(src_le);
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} else
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dstp[i] = av_le2ne16(dst_le);
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}
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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TInterlaceContext *tinterlace = ctx->priv;
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av_frame_free(&tinterlace->cur );
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av_frame_free(&tinterlace->next);
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av_freep(&tinterlace->black_data[0]);
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}
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static int config_out_props(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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AVFilterLink *inlink = outlink->src->inputs[0];
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
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TInterlaceContext *tinterlace = ctx->priv;
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int i;
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tinterlace->vsub = desc->log2_chroma_h;
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outlink->w = inlink->w;
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outlink->h = tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD || tinterlace->mode == MODE_MERGEX2?
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inlink->h*2 : inlink->h;
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if (tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD || tinterlace->mode == MODE_MERGEX2)
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outlink->sample_aspect_ratio = av_mul_q(inlink->sample_aspect_ratio,
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av_make_q(2, 1));
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if (tinterlace->mode == MODE_PAD) {
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uint8_t black[4] = { 0, 0, 0, 16 };
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int ret;
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ff_draw_init(&tinterlace->draw, outlink->format, 0);
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ff_draw_color(&tinterlace->draw, &tinterlace->color, black);
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if (ff_fmt_is_in(outlink->format, full_scale_yuvj_pix_fmts))
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tinterlace->color.comp[0].u8[0] = 0;
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ret = av_image_alloc(tinterlace->black_data, tinterlace->black_linesize,
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outlink->w, outlink->h, outlink->format, 16);
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if (ret < 0)
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return ret;
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ff_fill_rectangle(&tinterlace->draw, &tinterlace->color, tinterlace->black_data,
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tinterlace->black_linesize, 0, 0, outlink->w, outlink->h);
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}
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if (tinterlace->flags & (TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF)
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&& !(tinterlace->mode == MODE_INTERLEAVE_TOP
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|| tinterlace->mode == MODE_INTERLEAVE_BOTTOM)) {
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av_log(ctx, AV_LOG_WARNING, "low_pass_filter flags ignored with mode %d\n",
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tinterlace->mode);
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tinterlace->flags &= ~(TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF);
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}
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tinterlace->preout_time_base = inlink->time_base;
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if (tinterlace->mode == MODE_INTERLACEX2) {
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tinterlace->preout_time_base.den *= 2;
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outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){2,1});
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outlink->time_base = av_mul_q(inlink->time_base , (AVRational){1,2});
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} else if (tinterlace->mode == MODE_MERGEX2) {
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outlink->frame_rate = inlink->frame_rate;
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outlink->time_base = inlink->time_base;
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} else if (tinterlace->mode != MODE_PAD) {
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outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){1,2});
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outlink->time_base = av_mul_q(inlink->time_base , (AVRational){2,1});
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}
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for (i = 0; i<FF_ARRAY_ELEMS(standard_tbs); i++){
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if (!av_cmp_q(standard_tbs[i], outlink->time_base))
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break;
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}
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if (i == FF_ARRAY_ELEMS(standard_tbs) ||
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(tinterlace->flags & TINTERLACE_FLAG_EXACT_TB))
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outlink->time_base = tinterlace->preout_time_base;
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tinterlace->csp = av_pix_fmt_desc_get(outlink->format);
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if (tinterlace->flags & TINTERLACE_FLAG_CVLPF) {
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if (tinterlace->csp->comp[0].depth > 8)
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tinterlace->lowpass_line = lowpass_line_complex_c_16;
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else
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tinterlace->lowpass_line = lowpass_line_complex_c;
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if (ARCH_X86)
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ff_tinterlace_init_x86(tinterlace);
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} else if (tinterlace->flags & TINTERLACE_FLAG_VLPF) {
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if (tinterlace->csp->comp[0].depth > 8)
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tinterlace->lowpass_line = lowpass_line_c_16;
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else
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tinterlace->lowpass_line = lowpass_line_c;
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if (ARCH_X86)
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ff_tinterlace_init_x86(tinterlace);
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}
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av_log(ctx, AV_LOG_VERBOSE, "mode:%d filter:%s h:%d -> h:%d\n", tinterlace->mode,
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(tinterlace->flags & TINTERLACE_FLAG_CVLPF) ? "complex" :
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(tinterlace->flags & TINTERLACE_FLAG_VLPF) ? "linear" : "off",
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inlink->h, outlink->h);
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return 0;
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}
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#define FIELD_UPPER 0
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#define FIELD_LOWER 1
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#define FIELD_UPPER_AND_LOWER 2
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/**
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* Copy picture field from src to dst.
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*
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* @param src_field copy from upper, lower field or both
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* @param interleave leave a padding line between each copied line
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* @param dst_field copy to upper or lower field,
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* only meaningful when interleave is selected
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* @param flags context flags
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*/
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static inline
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void copy_picture_field(TInterlaceContext *tinterlace,
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uint8_t *dst[4], int dst_linesize[4],
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const uint8_t *src[4], int src_linesize[4],
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enum AVPixelFormat format, int w, int src_h,
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int src_field, int interleave, int dst_field,
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int flags)
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{
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format);
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int hsub = desc->log2_chroma_w;
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int plane, vsub = desc->log2_chroma_h;
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int k = src_field == FIELD_UPPER_AND_LOWER ? 1 : 2;
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int h;
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for (plane = 0; plane < desc->nb_components; plane++) {
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int lines = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT(src_h, vsub) : src_h;
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int cols = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT( w, hsub) : w;
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uint8_t *dstp = dst[plane];
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const uint8_t *srcp = src[plane];
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int srcp_linesize = src_linesize[plane] * k;
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int dstp_linesize = dst_linesize[plane] * (interleave ? 2 : 1);
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int clip_max = (1 << tinterlace->csp->comp[plane].depth) - 1;
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lines = (lines + (src_field == FIELD_UPPER)) / k;
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if (src_field == FIELD_LOWER)
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srcp += src_linesize[plane];
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if (interleave && dst_field == FIELD_LOWER)
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dstp += dst_linesize[plane];
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// Low-pass filtering is required when creating an interlaced destination from
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// a progressive source which contains high-frequency vertical detail.
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// Filtering will reduce interlace 'twitter' and Moire patterning.
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if (flags & (TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF)) {
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int x = !!(flags & TINTERLACE_FLAG_CVLPF);
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for (h = lines; h > 0; h--) {
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ptrdiff_t pref = src_linesize[plane];
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ptrdiff_t mref = -pref;
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if (h >= (lines - x)) mref = 0; // there is no line above
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else if (h <= (1 + x)) pref = 0; // there is no line below
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tinterlace->lowpass_line(dstp, cols, srcp, mref, pref, clip_max);
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dstp += dstp_linesize;
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srcp += srcp_linesize;
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}
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} else {
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if (tinterlace->csp->comp[plane].depth > 8)
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cols *= 2;
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av_image_copy_plane(dstp, dstp_linesize, srcp, srcp_linesize, cols, lines);
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}
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}
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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TInterlaceContext *tinterlace = ctx->priv;
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AVFrame *cur, *next, *out;
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int field, tff, ret;
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av_frame_free(&tinterlace->cur);
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tinterlace->cur = tinterlace->next;
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tinterlace->next = picref;
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cur = tinterlace->cur;
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next = tinterlace->next;
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/* we need at least two frames */
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if (!tinterlace->cur)
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return 0;
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switch (tinterlace->mode) {
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case MODE_MERGEX2: /* move the odd frame into the upper field of the new image, even into
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* the lower field, generating a double-height video at same framerate */
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case MODE_MERGE: /* move the odd frame into the upper field of the new image, even into
|
|
* the lower field, generating a double-height video at half framerate */
|
|
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
av_frame_copy_props(out, cur);
|
|
out->height = outlink->h;
|
|
out->interlaced_frame = 1;
|
|
out->top_field_first = 1;
|
|
out->sample_aspect_ratio = av_mul_q(cur->sample_aspect_ratio, av_make_q(2, 1));
|
|
|
|
/* write odd frame lines into the upper field of the new frame */
|
|
copy_picture_field(tinterlace, out->data, out->linesize,
|
|
(const uint8_t **)cur->data, cur->linesize,
|
|
inlink->format, inlink->w, inlink->h,
|
|
FIELD_UPPER_AND_LOWER, 1, tinterlace->mode == MODE_MERGEX2 ? inlink->frame_count_out & 1 ? FIELD_LOWER : FIELD_UPPER : FIELD_UPPER, tinterlace->flags);
|
|
/* write even frame lines into the lower field of the new frame */
|
|
copy_picture_field(tinterlace, out->data, out->linesize,
|
|
(const uint8_t **)next->data, next->linesize,
|
|
inlink->format, inlink->w, inlink->h,
|
|
FIELD_UPPER_AND_LOWER, 1, tinterlace->mode == MODE_MERGEX2 ? inlink->frame_count_out & 1 ? FIELD_UPPER : FIELD_LOWER : FIELD_LOWER, tinterlace->flags);
|
|
if (tinterlace->mode != MODE_MERGEX2)
|
|
av_frame_free(&tinterlace->next);
|
|
break;
|
|
|
|
case MODE_DROP_ODD: /* only output even frames, odd frames are dropped; height unchanged, half framerate */
|
|
case MODE_DROP_EVEN: /* only output odd frames, even frames are dropped; height unchanged, half framerate */
|
|
out = av_frame_clone(tinterlace->mode == MODE_DROP_EVEN ? cur : next);
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
av_frame_free(&tinterlace->next);
|
|
break;
|
|
|
|
case MODE_PAD: /* expand each frame to double height, but pad alternate
|
|
* lines with black; framerate unchanged */
|
|
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
av_frame_copy_props(out, cur);
|
|
out->height = outlink->h;
|
|
out->sample_aspect_ratio = av_mul_q(cur->sample_aspect_ratio, av_make_q(2, 1));
|
|
|
|
field = (1 + tinterlace->frame) & 1 ? FIELD_UPPER : FIELD_LOWER;
|
|
/* copy upper and lower fields */
|
|
copy_picture_field(tinterlace, out->data, out->linesize,
|
|
(const uint8_t **)cur->data, cur->linesize,
|
|
inlink->format, inlink->w, inlink->h,
|
|
FIELD_UPPER_AND_LOWER, 1, field, tinterlace->flags);
|
|
/* pad with black the other field */
|
|
copy_picture_field(tinterlace, out->data, out->linesize,
|
|
(const uint8_t **)tinterlace->black_data, tinterlace->black_linesize,
|
|
inlink->format, inlink->w, inlink->h,
|
|
FIELD_UPPER_AND_LOWER, 1, !field, tinterlace->flags);
|
|
break;
|
|
|
|
/* interleave upper/lower lines from odd frames with lower/upper lines from even frames,
|
|
* halving the frame rate and preserving image height */
|
|
case MODE_INTERLEAVE_TOP: /* top field first */
|
|
case MODE_INTERLEAVE_BOTTOM: /* bottom field first */
|
|
tff = tinterlace->mode == MODE_INTERLEAVE_TOP;
|
|
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
av_frame_copy_props(out, cur);
|
|
out->interlaced_frame = 1;
|
|
out->top_field_first = tff;
|
|
|
|
/* copy upper/lower field from cur */
|
|
copy_picture_field(tinterlace, out->data, out->linesize,
|
|
(const uint8_t **)cur->data, cur->linesize,
|
|
inlink->format, inlink->w, inlink->h,
|
|
tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER,
|
|
tinterlace->flags);
|
|
/* copy lower/upper field from next */
|
|
copy_picture_field(tinterlace, out->data, out->linesize,
|
|
(const uint8_t **)next->data, next->linesize,
|
|
inlink->format, inlink->w, inlink->h,
|
|
tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER,
|
|
tinterlace->flags);
|
|
av_frame_free(&tinterlace->next);
|
|
break;
|
|
case MODE_INTERLACEX2: /* re-interlace preserving image height, double frame rate */
|
|
/* output current frame first */
|
|
out = av_frame_clone(cur);
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
out->interlaced_frame = 1;
|
|
if (cur->pts != AV_NOPTS_VALUE)
|
|
out->pts = cur->pts*2;
|
|
|
|
out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base);
|
|
if ((ret = ff_filter_frame(outlink, out)) < 0)
|
|
return ret;
|
|
|
|
/* output mix of current and next frame */
|
|
tff = next->top_field_first;
|
|
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
av_frame_copy_props(out, next);
|
|
out->interlaced_frame = 1;
|
|
out->top_field_first = !tff;
|
|
|
|
if (next->pts != AV_NOPTS_VALUE && cur->pts != AV_NOPTS_VALUE)
|
|
out->pts = cur->pts + next->pts;
|
|
else
|
|
out->pts = AV_NOPTS_VALUE;
|
|
/* write current frame second field lines into the second field of the new frame */
|
|
copy_picture_field(tinterlace, out->data, out->linesize,
|
|
(const uint8_t **)cur->data, cur->linesize,
|
|
inlink->format, inlink->w, inlink->h,
|
|
tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER,
|
|
tinterlace->flags);
|
|
/* write next frame first field lines into the first field of the new frame */
|
|
copy_picture_field(tinterlace, out->data, out->linesize,
|
|
(const uint8_t **)next->data, next->linesize,
|
|
inlink->format, inlink->w, inlink->h,
|
|
tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER,
|
|
tinterlace->flags);
|
|
break;
|
|
default:
|
|
av_assert0(0);
|
|
}
|
|
|
|
out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base);
|
|
ret = ff_filter_frame(outlink, out);
|
|
tinterlace->frame++;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const AVFilterPad tinterlace_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad tinterlace_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_out_props,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter ff_vf_tinterlace = {
|
|
.name = "tinterlace",
|
|
.description = NULL_IF_CONFIG_SMALL("Perform temporal field interlacing."),
|
|
.priv_size = sizeof(TInterlaceContext),
|
|
.uninit = uninit,
|
|
.query_formats = query_formats,
|
|
.inputs = tinterlace_inputs,
|
|
.outputs = tinterlace_outputs,
|
|
.priv_class = &tinterlace_class,
|
|
};
|