Merge "Reduce memory usage by some extractors." into oc-dev

                    }

                }

                if (transferBuf != nullptr) { // Using shared buffers.

                    if (!transferBuf->isObserved()) {

                    if (!transferBuf->isObserved() && transferBuf != buf) {

                        // Transfer buffer must be part of a MediaBufferGroup.

                        ALOGV("adding shared memory buffer %p to local group", transferBuf);

                        mGroup->add_buffer(transferBuf);