am c675cf0f: Merge "Fix AudioTrack comments relating to use of restoreTrack_l()" into mnc-dev

     *      BAD_VALUE           size is invalid

     *      WOULD_BLOCK         when obtainBuffer() returns same, or

     *                          AudioTrack was stopped during the write

     *      DEAD_OBJECT         when AudioFlinger dies or the output device changes and

     *                          the track cannot be automatically restored.

     *                          The application needs to recreate the AudioTrack

     *                          because the audio device changed or AudioFlinger died.

     *                          This typically occurs for direct or offload tracks

     *                          or if mDoNotReconnect is true.

     *      or any other error code returned by IAudioTrack::start() or restoreTrack_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 write

        }

        if (mOutput != AUDIO_IO_HANDLE_NONE) {

            uint32_t halFrames;

            AudioSystem::getRenderPosition(mOutput, &halFrames, &dspFrames);

            uint32_t halFrames; // actually unused

            (void) AudioSystem::getRenderPosition(mOutput, &halFrames, &dspFrames);

            // FIXME: on getRenderPosition() error, we return OK with frame position 0.

        }

        // FIXME: dspFrames may not be zero in (mState == STATE_STOPPED || mState == STATE_FLUSHED)

        // due to hardware latency. We leave this behavior for now.

        *position = dspFrames;

    } else {

        if (mCblk->mFlags & CBLK_INVALID) {

            restoreTrack_l("getPosition");

            (void) restoreTrack_l("getPosition");

            // FIXME: for compatibility with the Java API we ignore the restoreTrack_l()

            // error here (e.g. DEAD_OBJECT) and return OK with the last recorded server position.

        }

        // IAudioTrack::stop() isn't synchronous; we don't know when presentation completes

    AudioSystem::clearAudioConfigCache();

    if (isOffloadedOrDirect_l() || mDoNotReconnect) {

        // FIXME re-creation of offloaded tracks is not yet implemented

        // FIXME re-creation of offloaded and direct tracks is not yet implemented;

        // reconsider enabling for linear PCM encodings when position can be preserved.

        return DEAD_OBJECT;

    }