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This basically gets a grip on the graph while doing driver switches operations on another thread (system thread or audio thread), because those can take time. Because the graph is refcounted, it'll be freed when the last operation finishes, which is what we want. This patch also only allows driver switching when the graph is in state LIFECYCLE_RUNNING, which is what we want anyway. --HG-- extra : rebase_source : 76365981ec909796509bd21e616b1ff8602406bd |
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