[FFmpeg-devel] [PATCH 1/5] lavfi: remplace passthrough_filter_frame with a flag.
ubitux at gmail.com
Sat May 11 18:20:57 CEST 2013
On Sat, May 11, 2013 at 05:17:48PM +0200, Michael Niedermayer wrote:
> > /**
> > * Some filters support a generic "enable" expression option that can be used
> > * to enable or disable a filter in the timeline. Filters supporting this
> > * option have this flag set. When the enable expression is false, the
> > * default no-op filter_frame() function is called in place of the
> > * filter_frame() callback defined on each input pad, thus the frame
> > * is passed unchanged to the next filters.
> > */
> > #define AVFILTER_FLAG_SUPPORT_TIMELINE_DEFAULT (1 << 16)
> > /**
> > * Same as AVFILTER_FLAG_SUPPORT_TIMELINE_DEFAULT, except that the filter will have its
> > * filter_frame() callback(s) called as usual even when the enable
> > * expression is false. The filter will disable filtering
> > * within the filter_frame() callback(s) itself, for example executing
> > * code depending on the AVFilterContext->is_disabled value.
> > */
> > #define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL (1 << 17)
> why do you need 2 flags ?
> if enabled filter_frame() is called
> if disabled passthrough_filter_frame() is called
passthrough_filter_frame() is deleted in that patch. We need to be able to
differentiate filter from filters with timeline from filters with internal
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