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FFmpeg/libavfilter/vf_yadif.c

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/*
* Copyright (C) 2006-2010 Michael Niedermayer <michaelni@gmx.at>
* 2010 James Darnley <james.darnley@gmail.com>
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; 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 "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: bottom field first
* 1: top field first
* -1: auto-detection
*/
int parity;
int frame_pending;
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;
} 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+1) / 8;
if (i) {
/* 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 = avfilter_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 = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
AV_PERM_REUSE, link->w, link->h);
if (!yadif->csp)
yadif->csp = &av_pix_fmt_descriptors[link->format];
if (yadif->csp->comp[0].depth_minus1 == 15)
yadif->filter_line = filter_line_c_16bit;
filter(ctx, yadif->out, tff ^ !is_second, tff);
if (is_second) {
if (yadif->next->pts != AV_NOPTS_VALUE &&
yadif->cur->pts != AV_NOPTS_VALUE) {
yadif->out->pts =
(yadif->next->pts&yadif->cur->pts) +
((yadif->next->pts^yadif->cur->pts)>>1);
} else {
yadif->out->pts = AV_NOPTS_VALUE;
}
avfilter_start_frame(ctx->outputs[0], yadif->out);
}
avfilter_draw_slice(ctx->outputs[0], 0, link->h, 1);
avfilter_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->prev)
yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
yadif->out = avfilter_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;
avfilter_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;
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 ((ret = avfilter_request_frame(link->src->inputs[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 = avfilter_poll_frame(link->src->inputs[0]);
if (val==1 && !yadif->next) { //FIXME change API to not requre this red tape
if ((ret = avfilter_request_frame(link->src->inputs[0])) < 0)
return ret;
val = avfilter_poll_frame(link->src->inputs[0]);
}
assert(yadif->next || !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_YUV420P16BE, PIX_FMT_YUV420P16LE ),
AV_NE( PIX_FMT_YUV422P16BE, PIX_FMT_YUV422P16LE ),
AV_NE( PIX_FMT_YUV444P16BE, PIX_FMT_YUV444P16LE ),
PIX_FMT_NONE
};
avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
return 0;
}
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
YADIFContext *yadif = ctx->priv;
av_unused int cpu_flags = av_get_cpu_flags();
yadif->mode = 0;
yadif->parity = -1;
yadif->csp = NULL;
if (args) sscanf(args, "%d:%d", &yadif->mode, &yadif->parity);
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\n", yadif->mode, yadif->parity);
return 0;
}
static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
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, },
{ .name = NULL}},
};
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