+typedef struct Mpeg4DecContext {
+ MpegEncContext m;
+
+ /// number of bits to represent the fractional part of time
+ int time_increment_bits;
+ int shape;
+ int vol_sprite_usage;
+ int sprite_brightness_change;
+ int num_sprite_warping_points;
+ /// sprite trajectory points
+ uint16_t sprite_traj[4][2];
+ /// sprite shift [isChroma]
+ int sprite_shift[2];
+
+ // reversible vlc
+ int rvlc;
+ /// could this stream contain resync markers
+ int resync_marker;
+ /// time distance of first I -> B, used for interlaced B-frames
+ int t_frame;
+
+ int new_pred;
+ int enhancement_type;
+ int scalability;
+ int use_intra_dc_vlc;
+ /// QP above which the ac VLC should be used for intra dc
+ int intra_dc_threshold;
+
+ /* bug workarounds */
+ int divx_version;
+ int divx_build;
+ int xvid_build;
+ int lavc_build;
+ /// flag for having shown the warning about invalid Divx B-frames
+ int showed_packed_warning;
+ /** does the stream contain the low_delay flag,
+ * used to work around buggy encoders. */
+ int vol_control_parameters;
+ int cplx_estimation_trash_i;
+ int cplx_estimation_trash_p;
+ int cplx_estimation_trash_b;
+} Mpeg4DecContext;
+
+/* dc encoding for MPEG-4 */