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Provide some default functions to simplify the implementation of common one
input one output video filters. Commited in SoC by Bobby Bingham on 2007-07-06 15:25:52 Originally committed as revision 11976 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -88,6 +88,25 @@ void avfilter_unref_pic(AVFilterPicRef *ref)
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av_free(ref);
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}
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/**
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* default config_link() implementation for output video links to simplify
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* the implementation of one input one output video filters */
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static int default_config_output_link(AVFilterLink *link)
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{
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link->w = link->src->inputs[0]->w;
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link->h = link->src->inputs[0]->h;
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return 0;
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}
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/**
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* default query_formats() implementation for output video links to simplify
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* the implementation of one input one output video filters */
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static int *default_query_output_formats(AVFilterLink *link)
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{
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return avfilter_make_format_list(1, link->src->inputs[0]->format);
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}
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int avfilter_link(AVFilterContext *src, unsigned srcpad,
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AVFilterContext *dst, unsigned dstpad)
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{
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@ -107,7 +126,10 @@ int avfilter_link(AVFilterContext *src, unsigned srcpad,
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link->cur_pic = NULL;
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/* find a format both filters support - TODO: auto-insert conversion filter */
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fmts[0] = src->filter->outputs[srcpad].query_formats(link);
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if(src->filter->outputs[srcpad].query_formats)
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fmts[0] = src->filter->outputs[srcpad].query_formats(link);
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else
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fmts[0] = default_query_output_formats(link);
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fmts[1] = dst->filter-> inputs[dstpad].query_formats(link);
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for(i = 0; fmts[0][i] != -1; i ++)
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for(j = 0; fmts[1][j] != -1; j ++)
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@ -127,8 +149,14 @@ format_done:
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return -1;
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}
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src->filter->outputs[srcpad].config_props(link);
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dst->filter-> inputs[dstpad].config_props(link);
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if (src->filter->outputs[srcpad].config_props)
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src->filter->outputs[srcpad].config_props(link);
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else
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default_config_output_link(link);
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if (dst->filter->inputs[dstpad].config_props)
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dst->filter->inputs[dstpad].config_props(link);
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return 0;
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}
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