Merge "Update android.hardware.media.bufferpool@2.0 HAL"

     *     to get shared buffers from the buffer pool.

     * @return connectionId Id of IConnection. The Id identifies

     *     sender and receiver in FMQ messages during buffer transfer.

     * @return mqDesc FMQ descriptor. The descriptor can be used to

     *     send/receive FMQ messages.

     * @return toFmqDesc FMQ descriptor. The descriptor is used to

     *     post buffer status messages.

     * @return fromFmqDesc FMQ descriptor. The descriptor is used to

     *     receive buffer invalidation messages from the buffer pool.

     */

    connect()

        generates (ResultStatus status, IConnection connection,

                   int64_t connectionId, fmq_sync<BufferStatusMessage> mqDesc);

                   int64_t connectionId,

                   fmq_sync<BufferStatusMessage> toFmqDesc,

                   fmq_sync<BufferInvalidationMessage> fromFmqDesc);

};

     */

    int64_t timestampUs;

};

/*

 * Buffer pool sends a buffer invalidation message to clients in order to

 * ensure fast reclamation of the buffers. Clients must free the invalidated

 * buffers as soon as possible upon receiving the message.

 */

struct BufferInvalidationMessage {

    /**

     * Buffers from fromBufferId to toBufferId must be invalidated.

     * Both of fromBufferId and toBufferId are inclusive.

     * If fromBufferId > toBufferID, wrap happens. In that case

     * the wrap is based on UINT32_MAX.

     */

    uint32_t fromBufferId;

    uint32_t toBufferId;

};