Merge "Fix issue 2428563: Camera rendered inoperable by voice call interruption."

        audioBuffer.frameCount = userSize/frameSize();

        // Calling obtainBuffer() with a negative wait count causes

        // an (almost) infinite wait time.

        status_t err = obtainBuffer(&audioBuffer, -1);

        // By using a wait count corresponding to twice the timeout period in

        // obtainBuffer() we give a chance to recover once for a read timeout

        // (if media_server crashed for instance) before returning a length of

        // 0 bytes read to the client

        status_t err = obtainBuffer(&audioBuffer, ((2 * MAX_RUN_TIMEOUT_MS) / WAIT_PERIOD_MS));

        if (err < 0) {

            // out of buffers, return #bytes written

            if (err == status_t(NO_MORE_BUFFERS))

                break;

            if (err == status_t(TIMED_OUT))

                err = 0;

            return ssize_t(err);

        }