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examples/filtering: extend comments about setting the filter graph endpoints 

That part is a constant source of confusions for readers, this should
help clarify the apparently inverted logic.
This commit is contained in:
Stefano Sabatini 2015-01-27 13:22:48 +01:00
parent af7b89e08b
commit d43c1ec684
2 changed files with 34 additions and 2 deletions
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18
doc/examples/filtering_audio.c
View File

@ -145,12 +145,28 @@ static int init_filters(const char *filters_descr)
goto end;
}
/* Endpoints for the filter graph. */
/*
* Set the endpoints for the filter graph. The filter_graph will
* be linked to the graph described by filters_descr.
*/
/*
* The buffer source output must be connected to the input pad of
* the first filter described by filters_descr; since the first
* filter input label is not specified, it is set to "in" by
* default.
*/
outputs->name = av_strdup("in");
outputs->filter_ctx = buffersrc_ctx;
outputs->pad_idx = 0;
outputs->next = NULL;
/*
* The buffer sink input must be connected to the output pad of
* the last filter described by filters_descr; since the last
* filter output label is not specified, it is set to "out" by
* default.
*/
inputs->name = av_strdup("out");
inputs->filter_ctx = buffersink_ctx;
inputs->pad_idx = 0;

18
doc/examples/filtering_video.c
View File

@ -128,12 +128,28 @@ static int init_filters(const char *filters_descr)
goto end;
}
/* Endpoints for the filter graph. */
/*
* Set the endpoints for the filter graph. The filter_graph will
* be linked to the graph described by filters_descr.
*/
/*
* The buffer source output must be connected to the input pad of
* the first filter described by filters_descr; since the first
* filter input label is not specified, it is set to "in" by
* default.
*/
outputs->name = av_strdup("in");
outputs->filter_ctx = buffersrc_ctx;
outputs->pad_idx = 0;
outputs->next = NULL;
/*
* The buffer sink input must be connected to the output pad of
* the last filter described by filters_descr; since the last
* filter output label is not specified, it is set to "out" by
* default.
*/
inputs->name = av_strdup("out");
inputs->filter_ctx = buffersink_ctx;
inputs->pad_idx = 0;