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a5e8c41c28
FFmpeg/libavfilter/vf_yadif.c
Anton Khirnov a5e8c41c28 lavfi: remove 'opaque' parameter from AVFilter.init() 
It is not used in any filters currently and is inherently evil. If
passing binary data to filters is required in the future, it should be
done with some AVOptions-based system.
2012-06-26 13:13:48 +02:00

458 lines
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C
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/*
* Copyright (C) 2006-2010 Michael Niedermayer <michaelni@gmx.at>
* 2010 James Darnley <james.darnley@gmail.com>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with Libav; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "libavutil/cpu.h"
#include "libavutil/common.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "yadif.h"
#undef NDEBUG
#include <assert.h>
typedef struct {
/**
* 0: send 1 frame for each frame
* 1: send 1 frame for each field
* 2: like 0 but skips spatial interlacing check
* 3: like 1 but skips spatial interlacing check
*/
int mode;
/**
* 0: top field first
* 1: bottom field first
* -1: auto-detection
*/
int parity;
int frame_pending;
/**
* 0: deinterlace all frames
* 1: only deinterlace frames marked as interlaced
*/
int auto_enable;
AVFilterBufferRef *cur;
AVFilterBufferRef *next;
AVFilterBufferRef *prev;
AVFilterBufferRef *out;
void (*filter_line)(uint8_t *dst,
uint8_t *prev, uint8_t *cur, uint8_t *next,
int w, int prefs, int mrefs, int parity, int mode);
const AVPixFmtDescriptor *csp;
int eof;
} YADIFContext;
#define CHECK(j)\
{ int score = FFABS(cur[mrefs-1+(j)] - cur[prefs-1-(j)])\
+ FFABS(cur[mrefs +(j)] - cur[prefs -(j)])\
+ FFABS(cur[mrefs+1+(j)] - cur[prefs+1-(j)]);\
if (score < spatial_score) {\
spatial_score= score;\
spatial_pred= (cur[mrefs +(j)] + cur[prefs -(j)])>>1;\
#define FILTER \
for (x = 0; x < w; x++) { \
int c = cur[mrefs]; \
int d = (prev2[0] + next2[0])>>1; \
int e = cur[prefs]; \
int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e) )>>1; \
int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e) )>>1; \
int diff = FFMAX3(temporal_diff0>>1, temporal_diff1, temporal_diff2); \
int spatial_pred = (c+e)>>1; \
int spatial_score = FFABS(cur[mrefs-1] - cur[prefs-1]) + FFABS(c-e) \
+ FFABS(cur[mrefs+1] - cur[prefs+1]) - 1; \
\
CHECK(-1) CHECK(-2) }} }} \
CHECK( 1) CHECK( 2) }} }} \
\
if (mode < 2) { \
int b = (prev2[2*mrefs] + next2[2*mrefs])>>1; \
int f = (prev2[2*prefs] + next2[2*prefs])>>1; \
int max = FFMAX3(d-e, d-c, FFMIN(b-c, f-e)); \
int min = FFMIN3(d-e, d-c, FFMAX(b-c, f-e)); \
\
diff = FFMAX3(diff, min, -max); \
} \
\
if (spatial_pred > d + diff) \
spatial_pred = d + diff; \
else if (spatial_pred < d - diff) \
spatial_pred = d - diff; \
\
dst[0] = spatial_pred; \
\
dst++; \
cur++; \
prev++; \
next++; \
prev2++; \
next2++; \
}
static void filter_line_c(uint8_t *dst,
uint8_t *prev, uint8_t *cur, uint8_t *next,
int w, int prefs, int mrefs, int parity, int mode)
{
int x;
uint8_t *prev2 = parity ? prev : cur ;
uint8_t *next2 = parity ? cur : next;
FILTER
}
static void filter_line_c_16bit(uint16_t *dst,
uint16_t *prev, uint16_t *cur, uint16_t *next,
int w, int prefs, int mrefs, int parity, int mode)
{
int x;
uint16_t *prev2 = parity ? prev : cur ;
uint16_t *next2 = parity ? cur : next;
mrefs /= 2;
prefs /= 2;
FILTER
}
static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
int parity, int tff)
{
YADIFContext *yadif = ctx->priv;
int y, i;
for (i = 0; i < yadif->csp->nb_components; i++) {
int w = dstpic->video->w;
int h = dstpic->video->h;
int refs = yadif->cur->linesize[i];
int df = (yadif->csp->comp[i].depth_minus1 + 8) / 8;
if (i == 1 || i == 2) {
/* Why is this not part of the per-plane description thing? */
w >>= yadif->csp->log2_chroma_w;
h >>= yadif->csp->log2_chroma_h;
}
for (y = 0; y < h; y++) {
if ((y ^ parity) & 1) {
uint8_t *prev = &yadif->prev->data[i][y*refs];
uint8_t *cur = &yadif->cur ->data[i][y*refs];
uint8_t *next = &yadif->next->data[i][y*refs];
uint8_t *dst = &dstpic->data[i][y*dstpic->linesize[i]];
int mode = y==1 || y+2==h ? 2 : yadif->mode;
yadif->filter_line(dst, prev, cur, next, w, y+1<h ? refs : -refs, y ? -refs : refs, parity ^ tff, mode);
} else {
memcpy(&dstpic->data[i][y*dstpic->linesize[i]],
&yadif->cur->data[i][y*refs], w*df);
}
}
}
#if HAVE_MMX
__asm__ volatile("emms \n\t" : : : "memory");
#endif
}
static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms, int w, int h)
{
AVFilterBufferRef *picref;
int width = FFALIGN(w, 32);
int height= FFALIGN(h+2, 32);
int i;
picref = ff_default_get_video_buffer(link, perms, width, height);
picref->video->w = w;
picref->video->h = h;
for (i = 0; i < 3; i++)
picref->data[i] += picref->linesize[i];
return picref;
}
static void return_frame(AVFilterContext *ctx, int is_second)
{
YADIFContext *yadif = ctx->priv;
AVFilterLink *link= ctx->outputs[0];
int tff;
if (yadif->parity == -1) {
tff = yadif->cur->video->interlaced ?
yadif->cur->video->top_field_first : 1;
} else {
tff = yadif->parity^1;
}
if (is_second) {
yadif->out = ff_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
AV_PERM_REUSE, link->w, link->h);
avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
yadif->out->video->interlaced = 0;
}
if (!yadif->csp)
yadif->csp = &av_pix_fmt_descriptors[link->format];
if (yadif->csp->comp[0].depth_minus1 / 8 == 1)
yadif->filter_line = filter_line_c_16bit;
filter(ctx, yadif->out, tff ^ !is_second, tff);
if (is_second) {
int64_t cur_pts = yadif->cur->pts;
int64_t next_pts = yadif->next->pts;
if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
yadif->out->pts = cur_pts + next_pts;
} else {
yadif->out->pts = AV_NOPTS_VALUE;
}
ff_start_frame(ctx->outputs[0], yadif->out);
}
ff_draw_slice(ctx->outputs[0], 0, link->h, 1);
ff_end_frame(ctx->outputs[0]);
yadif->frame_pending = (yadif->mode&1) && !is_second;
}
static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
{
AVFilterContext *ctx = link->dst;
YADIFContext *yadif = ctx->priv;
if (yadif->frame_pending)
return_frame(ctx, 1);
if (yadif->prev)
avfilter_unref_buffer(yadif->prev);
yadif->prev = yadif->cur;
yadif->cur = yadif->next;
yadif->next = picref;
if (!yadif->cur)
return;
if (yadif->auto_enable && !yadif->cur->video->interlaced) {
yadif->out = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
avfilter_unref_buffer(yadif->prev);
yadif->prev = NULL;
if (yadif->out->pts != AV_NOPTS_VALUE)
yadif->out->pts *= 2;
ff_start_frame(ctx->outputs[0], yadif->out);
return;
}
if (!yadif->prev)
yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
yadif->out = ff_get_video_buffer(ctx->outputs[0], AV_PERM_WRITE | AV_PERM_PRESERVE |
AV_PERM_REUSE, link->w, link->h);
avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
yadif->out->video->interlaced = 0;
if (yadif->out->pts != AV_NOPTS_VALUE)
yadif->out->pts *= 2;
ff_start_frame(ctx->outputs[0], yadif->out);
}
static void end_frame(AVFilterLink *link)
{
AVFilterContext *ctx = link->dst;
YADIFContext *yadif = ctx->priv;
if (!yadif->out)
return;
if (yadif->auto_enable && !yadif->cur->video->interlaced) {
ff_draw_slice(ctx->outputs[0], 0, link->h, 1);
ff_end_frame(ctx->outputs[0]);
return;
}
return_frame(ctx, 0);
}
static int request_frame(AVFilterLink *link)
{
AVFilterContext *ctx = link->src;
YADIFContext *yadif = ctx->priv;
if (yadif->frame_pending) {
return_frame(ctx, 1);
return 0;
}
do {
int ret;
if (yadif->eof)
return AVERROR_EOF;
ret = ff_request_frame(link->src->inputs[0]);
if (ret == AVERROR_EOF && yadif->next) {
AVFilterBufferRef *next = avfilter_ref_buffer(yadif->next, AV_PERM_READ);
next->pts = yadif->next->pts * 2 - yadif->cur->pts;
start_frame(link->src->inputs[0], next);
end_frame(link->src->inputs[0]);
yadif->eof = 1;
} else if (ret < 0) {
return ret;
}
} while (!yadif->cur);
return 0;
}
static int poll_frame(AVFilterLink *link)
{
YADIFContext *yadif = link->src->priv;
int ret, val;
if (yadif->frame_pending)
return 1;
val = ff_poll_frame(link->src->inputs[0]);
if (val <= 0)
return val;
if (val==1 && !yadif->next) { //FIXME change API to not requre this red tape
if ((ret = ff_request_frame(link->src->inputs[0])) < 0)
return ret;
val = ff_poll_frame(link->src->inputs[0]);
if (val <= 0)
return val;
}
assert(yadif->next || !val);
if (yadif->auto_enable && yadif->next && !yadif->next->video->interlaced)
return val;
return val * ((yadif->mode&1)+1);
}
static av_cold void uninit(AVFilterContext *ctx)
{
YADIFContext *yadif = ctx->priv;
if (yadif->prev) avfilter_unref_buffer(yadif->prev);
if (yadif->cur ) avfilter_unref_buffer(yadif->cur );
if (yadif->next) avfilter_unref_buffer(yadif->next);
}
static int query_formats(AVFilterContext *ctx)
{
static const enum PixelFormat pix_fmts[] = {
PIX_FMT_YUV420P,
PIX_FMT_YUV422P,
PIX_FMT_YUV444P,
PIX_FMT_YUV410P,
PIX_FMT_YUV411P,
PIX_FMT_GRAY8,
PIX_FMT_YUVJ420P,
PIX_FMT_YUVJ422P,
PIX_FMT_YUVJ444P,
AV_NE( PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE ),
PIX_FMT_YUV440P,
PIX_FMT_YUVJ440P,
AV_NE( PIX_FMT_YUV420P10BE, PIX_FMT_YUV420P10LE ),
AV_NE( PIX_FMT_YUV422P10BE, PIX_FMT_YUV422P10LE ),
AV_NE( PIX_FMT_YUV444P10BE, PIX_FMT_YUV444P10LE ),
AV_NE( PIX_FMT_YUV420P16BE, PIX_FMT_YUV420P16LE ),
AV_NE( PIX_FMT_YUV422P16BE, PIX_FMT_YUV422P16LE ),
AV_NE( PIX_FMT_YUV444P16BE, PIX_FMT_YUV444P16LE ),
PIX_FMT_YUVA420P,
PIX_FMT_NONE
};
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
return 0;
}
static av_cold int init(AVFilterContext *ctx, const char *args)
{
YADIFContext *yadif = ctx->priv;
int cpu_flags = av_get_cpu_flags();
yadif->mode = 0;
yadif->parity = -1;
yadif->auto_enable = 0;
yadif->csp = NULL;
if (args) sscanf(args, "%d:%d:%d", &yadif->mode, &yadif->parity, &yadif->auto_enable);
yadif->filter_line = filter_line_c;
if (HAVE_SSSE3 && cpu_flags & AV_CPU_FLAG_SSSE3)
yadif->filter_line = ff_yadif_filter_line_ssse3;
else if (HAVE_SSE && cpu_flags & AV_CPU_FLAG_SSE2)
yadif->filter_line = ff_yadif_filter_line_sse2;
else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX)
yadif->filter_line = ff_yadif_filter_line_mmx;
av_log(ctx, AV_LOG_INFO, "mode:%d parity:%d auto_enable:%d\n", yadif->mode, yadif->parity, yadif->auto_enable);
return 0;
}
static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
static int config_props(AVFilterLink *link)
{
link->time_base.num = link->src->inputs[0]->time_base.num;
link->time_base.den = link->src->inputs[0]->time_base.den * 2;
link->w = link->src->inputs[0]->w;
link->h = link->src->inputs[0]->h;
return 0;
}
AVFilter avfilter_vf_yadif = {
.name = "yadif",
.description = NULL_IF_CONFIG_SMALL("Deinterlace the input image"),
.priv_size = sizeof(YADIFContext),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.inputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.start_frame = start_frame,
.get_video_buffer = get_video_buffer,
.draw_slice = null_draw_slice,
.end_frame = end_frame, },
{ .name = NULL}},
.outputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.poll_frame = poll_frame,
.request_frame = request_frame,
.config_props = config_props, },
{ .name = NULL}},
};
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