451 lines
13 KiB
C
451 lines
13 KiB
C
/*
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* Copyright (C) 2006-2010 Michael Niedermayer <michaelni@gmx.at>
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* 2010 James Darnley <james.darnley@gmail.com>
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.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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#define PERM_RWP AV_PERM_WRITE | AV_PERM_PRESERVE | AV_PERM_REUSE
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#define CHECK(j)\
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{ int score = FFABS(cur[mrefs-1+(j)] - cur[prefs-1-(j)])\
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+ FFABS(cur[mrefs +(j)] - cur[prefs -(j)])\
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+ FFABS(cur[mrefs+1+(j)] - cur[prefs+1-(j)]);\
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if (score < spatial_score) {\
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spatial_score= score;\
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spatial_pred= (cur[mrefs +(j)] + cur[prefs -(j)])>>1;\
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#define FILTER \
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for (x = 0; x < w; x++) { \
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int c = cur[mrefs]; \
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int d = (prev2[0] + next2[0])>>1; \
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int e = cur[prefs]; \
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int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
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int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e) )>>1; \
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int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - 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[mrefs - 1] - cur[prefs - 1]) + FFABS(c-e) \
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+ FFABS(cur[mrefs + 1] - cur[prefs + 1]) - 1; \
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\
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CHECK(-1) CHECK(-2) }} }} \
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CHECK( 1) CHECK( 2) }} }} \
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\
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if (mode < 2) { \
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int b = (prev2[2 * mrefs] + next2[2 * mrefs])>>1; \
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int f = (prev2[2 * prefs] + next2[2 * prefs])>>1; \
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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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\
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diff = FFMAX3(diff, min, -max); \
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} \
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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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\
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dst[0] = spatial_pred; \
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\
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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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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 prefs, int mrefs, 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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FILTER
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}
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static void filter_line_c_16bit(uint16_t *dst,
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uint16_t *prev, uint16_t *cur, uint16_t *next,
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int w, int prefs, int mrefs, int parity,
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int mode)
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{
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int x;
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uint16_t *prev2 = parity ? prev : cur ;
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uint16_t *next2 = parity ? cur : next;
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mrefs /= 2;
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prefs /= 2;
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FILTER
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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 < yadif->csp->nb_components; i++) {
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int w = dstpic->video->w;
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int h = dstpic->video->h;
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int refs = yadif->cur->linesize[i];
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int df = (yadif->csp->comp[i].depth_minus1 + 8) / 8;
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if (i == 1 || i == 2) {
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/* Why is this not part of the per-plane description thing? */
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w >>= yadif->csp->log2_chroma_w;
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h >>= yadif->csp->log2_chroma_h;
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}
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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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int mode = y == 1 || y + 2 == h ? 2 : yadif->mode;
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yadif->filter_line(dst, prev, cur, next, w,
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y + 1 < h ? refs : -refs,
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y ? -refs : refs,
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parity ^ tff, 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 * df);
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}
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}
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}
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emms_c();
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}
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static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms,
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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 + 2, 32);
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int i;
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picref = ff_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] += picref->linesize[i];
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return picref;
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}
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static int 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, ret;
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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 = ff_get_video_buffer(link, PERM_RWP, link->w, link->h);
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if (!yadif->out)
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return AVERROR(ENOMEM);
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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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}
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if (!yadif->csp)
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yadif->csp = &av_pix_fmt_descriptors[link->format];
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if (yadif->csp->comp[0].depth_minus1 / 8 == 1)
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yadif->filter_line = filter_line_c_16bit;
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filter(ctx, yadif->out, tff ^ !is_second, tff);
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if (is_second) {
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int64_t cur_pts = yadif->cur->pts;
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int64_t next_pts = yadif->next->pts;
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if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
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yadif->out->pts = cur_pts + next_pts;
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} else {
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yadif->out->pts = AV_NOPTS_VALUE;
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}
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ret = ff_start_frame(ctx->outputs[0], yadif->out);
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if (ret < 0)
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return ret;
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}
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if ((ret = ff_draw_slice(ctx->outputs[0], 0, link->h, 1)) < 0 ||
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(ret = ff_end_frame(ctx->outputs[0])) < 0)
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return ret;
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yadif->frame_pending = (yadif->mode&1) && !is_second;
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return 0;
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}
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static int 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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link->cur_buf = NULL;
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if (!yadif->cur)
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return 0;
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if (yadif->auto_enable && !yadif->cur->video->interlaced) {
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yadif->out = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
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if (!yadif->out)
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return AVERROR(ENOMEM);
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avfilter_unref_bufferp(&yadif->prev);
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if (yadif->out->pts != AV_NOPTS_VALUE)
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yadif->out->pts *= 2;
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return ff_start_frame(ctx->outputs[0], yadif->out);
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}
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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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return AVERROR(ENOMEM);
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yadif->out = ff_get_video_buffer(ctx->outputs[0], PERM_RWP,
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link->w, link->h);
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if (!yadif->out)
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return AVERROR(ENOMEM);
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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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if (yadif->out->pts != AV_NOPTS_VALUE)
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yadif->out->pts *= 2;
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return ff_start_frame(ctx->outputs[0], yadif->out);
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}
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static int 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 0;
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if (yadif->auto_enable && !yadif->cur->video->interlaced) {
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int ret = ff_draw_slice(ctx->outputs[0], 0, link->h, 1);
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if (ret >= 0)
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ret = ff_end_frame(ctx->outputs[0]);
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return ret;
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}
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return_frame(ctx, 0);
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return 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 (yadif->eof)
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return AVERROR_EOF;
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ret = ff_request_frame(link->src->inputs[0]);
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if (ret == AVERROR_EOF && yadif->next) {
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AVFilterBufferRef *next =
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avfilter_ref_buffer(yadif->next, AV_PERM_READ);
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if (!next)
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return AVERROR(ENOMEM);
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next->pts = yadif->next->pts * 2 - yadif->cur->pts;
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start_frame(link->src->inputs[0], next);
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end_frame(link->src->inputs[0]);
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yadif->eof = 1;
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} else if (ret < 0) {
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return ret;
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}
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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 = ff_poll_frame(link->src->inputs[0]);
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if (val <= 0)
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return val;
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//FIXME change API to not requre this red tape
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if (val == 1 && !yadif->next) {
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if ((ret = ff_request_frame(link->src->inputs[0])) < 0)
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return ret;
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val = ff_poll_frame(link->src->inputs[0]);
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if (val <= 0)
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return val;
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}
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assert(yadif->next || !val);
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if (yadif->auto_enable && yadif->next && !yadif->next->video->interlaced)
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return val;
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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_bufferp(&yadif->prev);
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if (yadif->cur ) avfilter_unref_bufferp(&yadif->cur );
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if (yadif->next) avfilter_unref_bufferp(&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_YUV422P,
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PIX_FMT_YUV444P,
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PIX_FMT_YUV410P,
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PIX_FMT_YUV411P,
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PIX_FMT_GRAY8,
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PIX_FMT_YUVJ420P,
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PIX_FMT_YUVJ422P,
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PIX_FMT_YUVJ444P,
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AV_NE( PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE ),
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PIX_FMT_YUV440P,
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PIX_FMT_YUVJ440P,
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AV_NE( PIX_FMT_YUV420P10BE, PIX_FMT_YUV420P10LE ),
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AV_NE( PIX_FMT_YUV422P10BE, PIX_FMT_YUV422P10LE ),
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AV_NE( PIX_FMT_YUV444P10BE, PIX_FMT_YUV444P10LE ),
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AV_NE( PIX_FMT_YUV420P16BE, PIX_FMT_YUV420P16LE ),
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AV_NE( PIX_FMT_YUV422P16BE, PIX_FMT_YUV422P16LE ),
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AV_NE( PIX_FMT_YUV444P16BE, PIX_FMT_YUV444P16LE ),
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PIX_FMT_YUVA420P,
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PIX_FMT_NONE
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};
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ff_set_common_formats(ctx, ff_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)
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{
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YADIFContext *yadif = ctx->priv;
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yadif->mode = 0;
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yadif->parity = -1;
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yadif->auto_enable = 0;
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yadif->csp = NULL;
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if (args)
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sscanf(args, "%d:%d:%d",
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&yadif->mode, &yadif->parity, &yadif->auto_enable);
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yadif->filter_line = filter_line_c;
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if (HAVE_MMX)
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ff_yadif_init_x86(yadif);
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av_log(ctx, AV_LOG_VERBOSE, "mode:%d parity:%d auto_enable:%d\n",
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yadif->mode, yadif->parity, yadif->auto_enable);
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return 0;
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}
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static int null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
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{
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return 0;
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}
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static int config_props(AVFilterLink *link)
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{
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link->time_base.num = link->src->inputs[0]->time_base.num;
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link->time_base.den = link->src->inputs[0]->time_base.den * 2;
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link->w = link->src->inputs[0]->w;
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link->h = link->src->inputs[0]->h;
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return 0;
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}
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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 = (const 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 = (const 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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.config_props = config_props, },
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{ .name = NULL}},
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};
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