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vf_yadif: add an option to enable/disable deinterlacing based on src frame "interlaced" flag

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Signed-off-by: Joakim Plate <elupus@ecce.se>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Joakim Plate 2011-07-03 13:19:44 +02:00 committed by Anton Khirnov
parent 91aff2665d
commit ab09df9dea
2 changed files with 39 additions and 3 deletions
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14
doc/filters.texi
View File

@ -1504,7 +1504,7 @@ Flip the input video vertically.
Deinterlace the input video ("yadif" means "yet another deinterlacing Deinterlace the input video ("yadif" means "yet another deinterlacing
filter"). filter").
It accepts the optional parameters: @var{mode}:@var{parity}. It accepts the optional parameters: @var{mode}:@var{parity}:@var{auto}.
@var{mode} specifies the interlacing mode to adopt, accepts one of the @var{mode} specifies the interlacing mode to adopt, accepts one of the
following values: following values:
@ -1538,6 +1538,18 @@ Default value is -1.
If interlacing is unknown or decoder does not export this information, If interlacing is unknown or decoder does not export this information,
top field first will be assumed. top field first will be assumed.
@var{auto] specifies if deinterlacer should trust the interlaced flag
and only deinterlace frames marked as interlaced
@table @option
@item 0
deinterlace all frames
@item 1
only deinterlace frames marked as interlaced
@end table
Default value is 0.
@c man end VIDEO FILTERS @c man end VIDEO FILTERS
@chapter Video Sources @chapter Video Sources

28
libavfilter/vf_yadif.c
View File

@ -46,6 +46,12 @@ typedef struct {
int frame_pending; int frame_pending;
/**
* 0: deinterlace all frames
* 1: only deinterlace frames marked as interlaced
*/
int auto_enable;
AVFilterBufferRef *cur; AVFilterBufferRef *cur;
AVFilterBufferRef *next; AVFilterBufferRef *next;
AVFilterBufferRef *prev; AVFilterBufferRef *prev;
@ -242,6 +248,14 @@ static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
if (!yadif->cur) if (!yadif->cur)
return; 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;
avfilter_start_frame(ctx->outputs[0], yadif->out);
return;
}
if (!yadif->prev) if (!yadif->prev)
yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ); yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
@ -261,6 +275,12 @@ static void end_frame(AVFilterLink *link)
if (!yadif->out) if (!yadif->out)
return; return;
if (yadif->auto_enable && !yadif->cur->video->interlaced) {
avfilter_draw_slice(ctx->outputs[0], 0, link->h, 1);
avfilter_end_frame(ctx->outputs[0]);
return;
}
return_frame(ctx, 0); return_frame(ctx, 0);
} }
@ -301,6 +321,9 @@ static int poll_frame(AVFilterLink *link)
} }
assert(yadif->next || !val); assert(yadif->next || !val);
if (yadif->auto_enable && yadif->next && !yadif->next->video->interlaced)
return val;
return val * ((yadif->mode&1)+1); return val * ((yadif->mode&1)+1);
} }
@ -346,9 +369,10 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
yadif->mode = 0; yadif->mode = 0;
yadif->parity = -1; yadif->parity = -1;
yadif->auto_enable = 0;
yadif->csp = NULL; yadif->csp = NULL;
if (args) sscanf(args, "%d:%d", &yadif->mode, &yadif->parity); if (args) sscanf(args, "%d:%d:%d", &yadif->mode, &yadif->parity, &yadif->auto_enable);
yadif->filter_line = filter_line_c; yadif->filter_line = filter_line_c;
if (HAVE_SSSE3 && cpu_flags & AV_CPU_FLAG_SSSE3) if (HAVE_SSSE3 && cpu_flags & AV_CPU_FLAG_SSSE3)
@ -358,7 +382,7 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX)
yadif->filter_line = ff_yadif_filter_line_mmx; yadif->filter_line = ff_yadif_filter_line_mmx;
av_log(ctx, AV_LOG_INFO, "mode:%d parity:%d\n", yadif->mode, yadif->parity); av_log(ctx, AV_LOG_INFO, "mode:%d parity:%d auto_enable:%d\n", yadif->mode, yadif->parity, yadif->auto_enable);
return 0; return 0;
} }