+extern VLC ff_dc_lum_vlc;
+extern VLC ff_dc_chroma_vlc;
+
+typedef struct Mpeg1Context {
+ MpegEncContext mpeg_enc_ctx;
+ int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
+ int repeat_field; /* true if we must repeat the field */
+ AVPanScan pan_scan; /**< some temporary storage for the panscan */
+ int slice_count;
+ int swap_uv;//indicate VCR2
+ int save_aspect_info;
+ int save_width, save_height, save_progressive_seq;
+ AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
+ int sync; ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
+ int closed_gop; ///< GOP is closed
+} Mpeg1Context;