mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-09-09 01:07:01 +02:00
351 lines
10 KiB
C
351 lines
10 KiB
C
/*
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* Copyright (C) 2006-2010 Michael Niedermayer <michaelni@gmx.at>
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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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#include "libavutil/cpu.h"
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#include "libavutil/common.h"
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#include "avfilter.h"
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#include "yadif.h"
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#undef NDEBUG
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#include <assert.h>
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typedef struct {
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/**
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* 0: send 1 frame for each frame
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* 1: send 1 frame for each field
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* 2: like 0 but skips spatial interlacing check
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* 3: like 1 but skips spatial interlacing check
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*/
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int mode;
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/**
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* 0: bottom field first
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* 1: top field first
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* -1: auto-detection
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*/
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int parity;
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int frame_pending;
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AVFilterBufferRef *cur;
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AVFilterBufferRef *next;
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AVFilterBufferRef *prev;
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AVFilterBufferRef *out;
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void (*filter_line)(uint8_t *dst,
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uint8_t *prev, uint8_t *cur, uint8_t *next,
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int w, int refs, int parity, int mode);
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} YADIFContext;
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static void filter_line_c(uint8_t *dst,
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uint8_t *prev, uint8_t *cur, uint8_t *next,
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int w, int refs, int parity, int mode)
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{
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int x;
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uint8_t *prev2 = parity ? prev : cur ;
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uint8_t *next2 = parity ? cur : next;
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for (x = 0; x < w; x++) {
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int c = cur[-refs];
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int d = (prev2[0] + next2[0])>>1;
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int e = cur[+refs];
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int temporal_diff0 = FFABS(prev2[0] - next2[0]);
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int temporal_diff1 =(FFABS(prev[-refs] - c) + FFABS(prev[+refs] - e) )>>1;
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int temporal_diff2 =(FFABS(next[-refs] - c) + FFABS(next[+refs] - e) )>>1;
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int diff = FFMAX3(temporal_diff0>>1, temporal_diff1, temporal_diff2);
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int spatial_pred = (c+e)>>1;
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int spatial_score = FFABS(cur[-refs-1] - cur[+refs-1]) + FFABS(c-e)
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+ FFABS(cur[-refs+1] - cur[+refs+1]) - 1;
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#define CHECK(j)\
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{ int score = FFABS(cur[-refs-1+j] - cur[+refs-1-j])\
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+ FFABS(cur[-refs +j] - cur[+refs -j])\
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+ FFABS(cur[-refs+1+j] - cur[+refs+1-j]);\
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if (score < spatial_score) {\
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spatial_score= score;\
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spatial_pred= (cur[-refs +j] + cur[+refs -j])>>1;\
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CHECK(-1) CHECK(-2) }} }}
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CHECK( 1) CHECK( 2) }} }}
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if (mode < 2) {
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int b = (prev2[-2*refs] + next2[-2*refs])>>1;
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int f = (prev2[+2*refs] + next2[+2*refs])>>1;
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#if 0
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int a = cur[-3*refs];
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int g = cur[+3*refs];
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int max = FFMAX3(d-e, d-c, FFMIN3(FFMAX(b-c,f-e),FFMAX(b-c,b-a),FFMAX(f-g,f-e)) );
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int min = FFMIN3(d-e, d-c, FFMAX3(FFMIN(b-c,f-e),FFMIN(b-c,b-a),FFMIN(f-g,f-e)) );
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#else
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int max = FFMAX3(d-e, d-c, FFMIN(b-c, f-e));
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int min = FFMIN3(d-e, d-c, FFMAX(b-c, f-e));
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#endif
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diff = FFMAX3(diff, min, -max);
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}
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if (spatial_pred > d + diff)
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spatial_pred = d + diff;
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else if (spatial_pred < d - diff)
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spatial_pred = d - diff;
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dst[0] = spatial_pred;
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dst++;
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cur++;
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prev++;
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next++;
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prev2++;
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next2++;
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}
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}
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static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
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int parity, int tff)
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{
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YADIFContext *yadif = ctx->priv;
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int y, i;
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for (i = 0; i < 3; i++) {
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int is_chroma = !!i;
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int w = dstpic->video->w >> is_chroma;
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int h = dstpic->video->h >> is_chroma;
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int refs = yadif->cur->linesize[i];
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for (y = 0; y < h; y++) {
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if ((y ^ parity) & 1) {
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uint8_t *prev = &yadif->prev->data[i][y*refs];
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uint8_t *cur = &yadif->cur ->data[i][y*refs];
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uint8_t *next = &yadif->next->data[i][y*refs];
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uint8_t *dst = &dstpic->data[i][y*dstpic->linesize[i]];
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yadif->filter_line(dst, prev, cur, next, w, refs, parity ^ tff, yadif->mode);
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} else {
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memcpy(&dstpic->data[i][y*dstpic->linesize[i]],
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&yadif->cur->data[i][y*refs], w);
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}
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}
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}
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#if HAVE_MMX
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__asm__ volatile("emms \n\t" : : : "memory");
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#endif
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}
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static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms, int w, int h)
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{
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AVFilterBufferRef *picref;
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int width = FFALIGN(w, 32);
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int height= FFALIGN(h+6, 32);
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int i;
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picref = avfilter_default_get_video_buffer(link, perms, width, height);
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picref->video->w = w;
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picref->video->h = h;
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for (i = 0; i < 3; i++)
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picref->data[i] += 3 * picref->linesize[i];
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return picref;
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}
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static void return_frame(AVFilterContext *ctx, int is_second)
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{
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YADIFContext *yadif = ctx->priv;
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AVFilterLink *link= ctx->outputs[0];
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int tff;
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if (yadif->parity == -1) {
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tff = yadif->cur->video->interlaced ?
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yadif->cur->video->top_field_first : 1;
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} else {
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tff = yadif->parity^1;
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}
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if (is_second)
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yadif->out = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
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AV_PERM_REUSE, link->w, link->h);
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filter(ctx, yadif->out, tff ^ !is_second, tff);
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if (is_second) {
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if (yadif->next->pts != AV_NOPTS_VALUE &&
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yadif->cur->pts != AV_NOPTS_VALUE) {
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yadif->out->pts =
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(yadif->next->pts&yadif->cur->pts) +
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((yadif->next->pts^yadif->cur->pts)>>1);
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} else {
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yadif->out->pts = AV_NOPTS_VALUE;
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}
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avfilter_start_frame(ctx->outputs[0], yadif->out);
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}
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avfilter_draw_slice(ctx->outputs[0], 0, link->h, 1);
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avfilter_end_frame(ctx->outputs[0]);
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yadif->frame_pending = (yadif->mode&1) && !is_second;
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}
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static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
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{
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AVFilterContext *ctx = link->dst;
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YADIFContext *yadif = ctx->priv;
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if (yadif->frame_pending)
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return_frame(ctx, 1);
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if (yadif->prev)
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avfilter_unref_buffer(yadif->prev);
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yadif->prev = yadif->cur;
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yadif->cur = yadif->next;
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yadif->next = picref;
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if (!yadif->cur)
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return;
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if (!yadif->prev)
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yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
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yadif->out = avfilter_get_video_buffer(ctx->outputs[0], AV_PERM_WRITE | AV_PERM_PRESERVE |
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AV_PERM_REUSE, link->w, link->h);
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avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
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yadif->out->video->interlaced = 0;
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avfilter_start_frame(ctx->outputs[0], yadif->out);
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}
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static void end_frame(AVFilterLink *link)
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{
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AVFilterContext *ctx = link->dst;
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YADIFContext *yadif = ctx->priv;
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if (!yadif->out)
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return;
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return_frame(ctx, 0);
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}
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static int request_frame(AVFilterLink *link)
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{
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AVFilterContext *ctx = link->src;
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YADIFContext *yadif = ctx->priv;
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if (yadif->frame_pending) {
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return_frame(ctx, 1);
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return 0;
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}
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do {
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int ret;
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if ((ret = avfilter_request_frame(link->src->inputs[0])))
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return ret;
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} while (!yadif->cur);
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return 0;
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}
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static int poll_frame(AVFilterLink *link)
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{
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YADIFContext *yadif = link->src->priv;
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int ret, val;
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if (yadif->frame_pending)
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return 1;
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val = avfilter_poll_frame(link->src->inputs[0]);
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if (val==1 && !yadif->next) { //FIXME change API to not requre this red tape
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if ((ret = avfilter_request_frame(link->src->inputs[0])) < 0)
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return ret;
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val = avfilter_poll_frame(link->src->inputs[0]);
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}
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assert(yadif->next);
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return val * ((yadif->mode&1)+1);
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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YADIFContext *yadif = ctx->priv;
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if (yadif->prev) avfilter_unref_buffer(yadif->prev);
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if (yadif->cur ) avfilter_unref_buffer(yadif->cur );
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if (yadif->next) avfilter_unref_buffer(yadif->next);
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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 PixelFormat pix_fmts[] = {
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PIX_FMT_YUV420P,
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PIX_FMT_GRAY8,
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PIX_FMT_NONE
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};
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avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
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return 0;
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}
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static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
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{
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YADIFContext *yadif = ctx->priv;
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av_unused int cpu_flags = av_get_cpu_flags();
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yadif->mode = 0;
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yadif->parity = -1;
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if (args) sscanf(args, "%d:%d", &yadif->mode, &yadif->parity);
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yadif->filter_line = filter_line_c;
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if (HAVE_SSSE3 && cpu_flags & AV_CPU_FLAG_SSSE3)
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yadif->filter_line = ff_yadif_filter_line_ssse3;
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else if (HAVE_SSE && cpu_flags & AV_CPU_FLAG_SSE2)
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yadif->filter_line = ff_yadif_filter_line_sse2;
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else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX)
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yadif->filter_line = ff_yadif_filter_line_mmx;
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av_log(ctx, AV_LOG_INFO, "mode:%d parity:%d\n", yadif->mode, yadif->parity);
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return 0;
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}
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static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
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AVFilter avfilter_vf_yadif = {
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.name = "yadif",
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.description = NULL_IF_CONFIG_SMALL("Deinterlace the input image"),
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.priv_size = sizeof(YADIFContext),
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.init = init,
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.uninit = uninit,
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.query_formats = query_formats,
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.inputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.start_frame = start_frame,
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.get_video_buffer = get_video_buffer,
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.draw_slice = null_draw_slice,
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.end_frame = end_frame, },
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{ .name = NULL}},
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.outputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.poll_frame = poll_frame,
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.request_frame = request_frame, },
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{ .name = NULL}},
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};
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