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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
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
following values:
@ -1538,6 +1538,18 @@ Default value is -1.
If interlacing is unknown or decoder does not export this information,
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
@chapter Video Sources

28
libavfilter/vf_yadif.c
View File

@ -46,6 +46,12 @@ typedef struct {
int frame_pending;
/**
* 0: deinterlace all frames
* 1: only deinterlace frames marked as interlaced
*/
int auto_enable;
AVFilterBufferRef *cur;
AVFilterBufferRef *next;
AVFilterBufferRef *prev;
@ -242,6 +248,14 @@ static void start_frame(AVFilterLink *link, AVFilterBufferRef *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;
avfilter_start_frame(ctx->outputs[0], yadif->out);
return;
}
if (!yadif->prev)
yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
@ -261,6 +275,12 @@ static void end_frame(AVFilterLink *link)
if (!yadif->out)
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);
}
@ -301,6 +321,9 @@ static int poll_frame(AVFilterLink *link)
}
assert(yadif->next || !val);
if (yadif->auto_enable && yadif->next && !yadif->next->video->interlaced)
return val;
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->parity = -1;
yadif->auto_enable = 0;
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;
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)
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;
}