Copy necessary context variables from a previous thread context to the current one.
If not defined, the next thread will start automatically; otherwise, the codec
must call ff_thread_finish_setup().
dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
Copy necessary context variables from a previous thread context to the current one. If not defined, the next thread will start automatically; otherwise, the codec must call ff_thread_finish_setup().
dst and src will (rarely) point to the same context, in which case memcpy should be skipped.