Merge "AudioRecord::read() can be non-blocking to match AudioTrack"

     *      WOULD_BLOCK         when obtainBuffer() returns same, or

     *                          AudioRecord was stopped during the read

     *      or any other error code returned by IAudioRecord::start() or restoreRecord_l().

     * Default behavior is to only return when all data has been transferred. Set 'blocking' to

     * false for the method to return immediately without waiting to try multiple times to read

     * the full content of the buffer.

     */

            ssize_t     read(void* buffer, size_t size);

            ssize_t     read(void* buffer, size_t size, bool blocking = true);

    /* Return the number of input frames lost in the audio driver since the last call of this

     * function.  Audio driver is expected to reset the value to 0 and restart counting upon

// -------------------------------------------------------------------------

ssize_t AudioRecord::read(void* buffer, size_t userSize)

ssize_t AudioRecord::read(void* buffer, size_t userSize, bool blocking)

{

    if (mTransfer != TRANSFER_SYNC) {

        return INVALID_OPERATION;

    while (userSize >= mFrameSize) {

        audioBuffer.frameCount = userSize / mFrameSize;

        status_t err = obtainBuffer(&audioBuffer, &ClientProxy::kForever);

        status_t err = obtainBuffer(&audioBuffer,

                blocking ? &ClientProxy::kForever : &ClientProxy::kNonBlocking);

        if (err < 0) {

            if (read > 0) {

                break;