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v4l2codecs: Query the right buffer before expbuf
We were previously always querying index 0, and while the number of planes per buffer will never change, it seems more proper to query the right buffer rather than always the first one. This was found while reading strace logs, and wondering why the V4L2_BUF_FLAG_MAPPED flag was present on all ¬0 indices even though that happened before VIDIOC_EXPBUF. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5647>
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@ -564,7 +564,7 @@ gst_v4l2_decoder_export_buffer (GstV4l2Decoder * self,
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gint i, ret;
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struct v4l2_plane planes[GST_VIDEO_MAX_PLANES] = { {0} };
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struct v4l2_buffer v4l2_buf = {
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.index = 0,
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.index = index,
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.type = direction_to_buffer_type (self, direction),
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};
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