Add a hidden flag to indicate exif data block.

     */

    public static final int BUFFER_FLAG_PARTIAL_FRAME = 8;

    /**

     * This indicates that the buffer contains non-media data for the

     * muxer to process.

     *

     * All muxer data should start with a FOURCC header that determines the type of data.

     *

     * For example, when it contains Exif data sent to a MediaMuxer track of

     * {@link MediaFormat#MIMETYPE_IMAGE_ANDROID_HEIC} type, the data must start with

     * Exif header ("Exif\0\0"), followed by the TIFF header (See JEITA CP-3451C Section 4.5.2.)

     *

     * @hide

     */

    public static final int BUFFER_FLAG_MUXER_DATA = 16;

    /** @hide */

    @IntDef(

        flag = true,

            BUFFER_FLAG_CODEC_CONFIG,

            BUFFER_FLAG_END_OF_STREAM,

            BUFFER_FLAG_PARTIAL_FRAME,

            BUFFER_FLAG_MUXER_DATA,

    })

    @Retention(RetentionPolicy.SOURCE)

    public @interface BufferFlag {}