avfilter: Return more meaningful error codes
Signed-off-by: Diego Biurrun <diego@biurrun.de>
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@ -79,7 +79,7 @@ int avfilter_link(AVFilterContext *src, unsigned srcpad,
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if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
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src->outputs[srcpad] || dst->inputs[dstpad])
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return -1;
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return AVERROR(EINVAL);
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if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
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av_log(src, AV_LOG_ERROR,
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@ -254,7 +254,8 @@ int ff_request_frame(AVFilterLink *link)
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return link->srcpad->request_frame(link);
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else if (link->src->inputs[0])
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return ff_request_frame(link->src->inputs[0]);
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else return -1;
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else
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return AVERROR(EINVAL);
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}
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int ff_poll_frame(AVFilterLink *link)
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@ -267,7 +268,7 @@ int ff_poll_frame(AVFilterLink *link)
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for (i = 0; i < link->src->nb_inputs; i++) {
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int val;
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if (!link->src->inputs[i])
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return -1;
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return AVERROR(EINVAL);
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val = ff_poll_frame(link->src->inputs[i]);
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min = FFMIN(min, val);
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}
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