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doc/filter_design: fix a few typos

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Stefano Sabatini 2012-07-22 11:28:57 +02:00
parent c0b91348fe
commit 8c2ce16f93
1 changed files with 4 additions and 4 deletions
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doc/filter_design.txt
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@ -12,7 +12,7 @@ Format negotiation
================== ==================
The query_formats method should set, for each input and each output links, The query_formats method should set, for each input and each output links,
the list supported formats. the list of supported formats.
For video links, that means pixel format. For audio links, that means For video links, that means pixel format. For audio links, that means
channel layout, and sample format (the sample packing is implied by the channel layout, and sample format (the sample packing is implied by the
@ -26,7 +26,7 @@ Format negotiation
references to the list are updated. references to the list are updated.
That means that if a filter requires that its input and output have the That means that if a filter requires that its input and output have the
same format amongst a supported list, all it have to do is use a reference same format amongst a supported list, all it has to do is use a reference
to the same list of formats. to the same list of formats.
@ -70,7 +70,7 @@ Frame scheduling
request_frame method or the application. request_frame method or the application.
If a filter has several inputs, the filter must be ready for frames If a filter has several inputs, the filter must be ready for frames
arriving randomly on any input. Therefore, any filter with several input arriving randomly on any input. Therefore, any filter with several inputs
will most likely require some kind of queuing mechanism. It is perfectly will most likely require some kind of queuing mechanism. It is perfectly
acceptable to have a limited queue and to drop frames when the inputs acceptable to have a limited queue and to drop frames when the inputs
are too unbalanced. are too unbalanced.
@ -85,7 +85,7 @@ Frame scheduling
For a filter, if there are queued frames already ready, one of these For a filter, if there are queued frames already ready, one of these
frames should be pushed. If not, the filter should request a frame on frames should be pushed. If not, the filter should request a frame on
one of its input, repeatedly until at least one frame has been pushed. one of its inputs, repeatedly until at least one frame has been pushed.
Return values: Return values:
if request_frame could produce a frame, it should return 0; if request_frame could produce a frame, it should return 0;