/* global.h, global variables                                               *//* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. *//* * Disclaimer of Warranty * * These software programs are available to the user without any license fee or * royalty on an "as is" basis.  The MPEG Software Simulation Group disclaims * any and all warranties, whether express, implied, or statuary, including any * implied warranties or merchantability or of fitness for a particular * purpose.  In no event shall the copyright-holder be liable for any * incidental, punitive, or consequential damages of any kind whatsoever * arising from the use of these programs. * * This disclaimer of warranty extends to the user of these programs and user's * customers, employees, agents, transferees, successors, and assigns. * * The MPEG Software Simulation Group does not represent or warrant that the * programs furnished hereunder are free of infringement of any third-party * patents. * * Commercial implementations of MPEG-1 and MPEG-2 video, including shareware, * are subject to royalty fees to patent holders.  Many of these patents are * general enough such that they are unavoidable regardless of implementation * design. * */#include "mpeg2dec.h"/* choose between declaration (GLOBAL undefined) * and definition (GLOBAL defined) * GLOBAL is defined in exactly one file mpeg2dec.c) */#ifndef GLOBAL#define EXTERN extern#else#define EXTERN#endif/* prototypes of global functions *//* readpic.c */void Substitute_Frame_Buffer _ANSI_ARGS_ ((int bitstream_framenum,   int sequence_framenum));/* Get_Bits.c */void Initialize_Buffer _ANSI_ARGS_((void));void Fill_Buffer _ANSI_ARGS_((void));unsigned int Show_Bits _ANSI_ARGS_((int n));unsigned int Get_Bits1 _ANSI_ARGS_((void));void Flush_Buffer _ANSI_ARGS_((int n));unsigned int Get_Bits _ANSI_ARGS_((int n));int Get_Byte _ANSI_ARGS_((void));int Get_Word _ANSI_ARGS_((void));/* systems.c */void Next_Packet _ANSI_ARGS_((void));int Get_Long _ANSI_ARGS_((void));void Flush_Buffer32 _ANSI_ARGS_((void));unsigned int Get_Bits32 _ANSI_ARGS_((void));/* getblk.c */void Decode_MPEG1_Intra_Block _ANSI_ARGS_((int comp, int dc_dct_pred[]));void Decode_MPEG1_Non_Intra_Block _ANSI_ARGS_((int comp));void Decode_MPEG2_Intra_Block _ANSI_ARGS_((int comp, int dc_dct_pred[]));void Decode_MPEG2_Non_Intra_Block _ANSI_ARGS_((int comp));/* gethdr.c */int Get_Hdr _ANSI_ARGS_((void));void next_start_code _ANSI_ARGS_((void));int slice_header _ANSI_ARGS_((void));void marker_bit _ANSI_ARGS_((char *text));/* getpic.c */void Decode_Picture _ANSI_ARGS_((int bitstream_framenum,   int sequence_framenum));void Output_Last_Frame_of_Sequence _ANSI_ARGS_((int framenum));/* getvlc.c */int Get_macroblock_type _ANSI_ARGS_((void));int Get_motion_code _ANSI_ARGS_((void));int Get_dmvector _ANSI_ARGS_((void));int Get_coded_block_pattern _ANSI_ARGS_((void));int Get_macroblock_address_increment _ANSI_ARGS_((void));int Get_Luma_DC_dct_diff _ANSI_ARGS_((void));int Get_Chroma_DC_dct_diff _ANSI_ARGS_((void));/* idct.c */void Fast_IDCT _ANSI_ARGS_((short *block));void Initialize_Fast_IDCT _ANSI_ARGS_((void));/* Reference_IDCT.c */void Initialize_Reference_IDCT _ANSI_ARGS_((void));void Reference_IDCT _ANSI_ARGS_((short *block));/* motion.c */void motion_vectors _ANSI_ARGS_((int PMV[2][2][2], int dmvector[2],  int motion_vertical_field_select[2][2], int s, int motion_vector_count,   int mv_format, int h_r_size, int v_r_size, int dmv, int mvscale));void motion_vector _ANSI_ARGS_((int *PMV, int *dmvector,  int h_r_size, int v_r_size, int dmv, int mvscale, int full_pel_vector));void Dual_Prime_Arithmetic _ANSI_ARGS_((int DMV[][2], int *dmvector, int mvx, int mvy));/* mpeg2dec.c */void Error _ANSI_ARGS_((char *text));void Warning _ANSI_ARGS_((char *text));void Print_Bits _ANSI_ARGS_((int code, int bits, int len));/* recon.c */void form_predictions _ANSI_ARGS_((int bx, int by, int macroblock_type,   int motion_type, int PMV[2][2][2], int motion_vertical_field_select[2][2],   int dmvector[2], int stwtype));/* spatscal.c */void Spatial_Prediction _ANSI_ARGS_((void));/* store.c */void Write_Frame _ANSI_ARGS_((unsigned char *src[], int frame));#ifdef DISPLAY/* display.c */void Initialize_Display_Process _ANSI_ARGS_((char *name));void Terminate_Display_Process _ANSI_ARGS_((void));void Display_Second_Field _ANSI_ARGS_((void));void dither _ANSI_ARGS_((unsigned char *src[]));void Initialize_Dither_Matrix _ANSI_ARGS_((void));#endif/* global variables */EXTERN char Version[]#ifdef GLOBAL  ="mpeg2decode V1.2a, 96/07/19"#endif;EXTERN char Author[]#ifdef GLOBAL  ="(C) 1996, MPEG Software Simulation Group"#endif;/* zig-zag and alternate scan patterns */EXTERN unsigned char scan[2][64]#ifdef GLOBAL={  { /* Zig-Zag scan pattern  */    0,1,8,16,9,2,3,10,17,24,32,25,18,11,4,5,    12,19,26,33,40,48,41,34,27,20,13,6,7,14,21,28,    35,42,49,56,57,50,43,36,29,22,15,23,30,37,44,51,    58,59,52,45,38,31,39,46,53,60,61,54,47,55,62,63  },  { /* Alternate scan pattern */    0,8,16,24,1,9,2,10,17,25,32,40,48,56,57,49,    41,33,26,18,3,11,4,12,19,27,34,42,50,58,35,43,    51,59,20,28,5,13,6,14,21,29,36,44,52,60,37,45,    53,61,22,30,7,15,23,31,38,46,54,62,39,47,55,63  }}#endif;/* default intra quantization matrix */EXTERN unsigned char default_intra_quantizer_matrix[64]#ifdef GLOBAL={  8, 16, 19, 22, 26, 27, 29, 34,  16, 16, 22, 24, 27, 29, 34, 37,  19, 22, 26, 27, 29, 34, 34, 38,  22, 22, 26, 27, 29, 34, 37, 40,  22, 26, 27, 29, 32, 35, 40, 48,  26, 27, 29, 32, 35, 40, 48, 58,  26, 27, 29, 34, 38, 46, 56, 69,  27, 29, 35, 38, 46, 56, 69, 83}#endif;/* non-linear quantization coefficient table */EXTERN unsigned char Non_Linear_quantizer_scale[32]#ifdef GLOBAL={   0, 1, 2, 3, 4, 5, 6, 7,   8,10,12,14,16,18,20,22,  24,28,32,36,40,44,48,52,  56,64,72,80,88,96,104,112}#endif;/* color space conversion coefficients * for YCbCr -> RGB mapping * * entries are {crv,cbu,cgu,cgv} * * crv=(255/224)*65536*(1-cr)/0.5 * cbu=(255/224)*65536*(1-cb)/0.5 * cgu=(255/224)*65536*(cb/cg)*(1-cb)/0.5 * cgv=(255/224)*65536*(cr/cg)*(1-cr)/0.5 * * where Y=cr*R+cg*G+cb*B (cr+cg+cb=1) *//* ISO/IEC 13818-2 section 6.3.6 sequence_display_extension() */EXTERN int Inverse_Table_6_9[8][4]#ifdef GLOBAL={  {117504, 138453, 13954, 34903}, /* no sequence_display_extension */  {117504, 138453, 13954, 34903}, /* ITU-R Rec. 709 (1990) */  {104597, 132201, 25675, 53279}, /* unspecified */  {104597, 132201, 25675, 53279}, /* reserved */  {104448, 132798, 24759, 53109}, /* FCC */  {104597, 132201, 25675, 53279}, /* ITU-R Rec. 624-4 System B, G */  {104597, 132201, 25675, 53279}, /* SMPTE 170M */  {117579, 136230, 16907, 35559}  /* SMPTE 240M (1987) */}#endif;/* output types (Output_Type) */#define T_YUV   0#define T_SIF   1#define T_TGA   2#define T_PPM   3#define T_X11   4#define T_X11HIQ 5/* decoder operation control variables */EXTERN int Output_Type;EXTERN int hiQdither;/* decoder operation control flags */EXTERN int Quiet_Flag;EXTERN int Trace_Flag;EXTERN int Fault_Flag;EXTERN int Verbose_Flag;EXTERN int Two_Streams;EXTERN int Spatial_Flag;EXTERN int Reference_IDCT_Flag;EXTERN int Frame_Store_Flag;EXTERN int System_Stream_Flag;EXTERN int Display_Progressive_Flag;EXTERN int Ersatz_Flag;EXTERN int Big_Picture_Flag;EXTERN int Verify_Flag;EXTERN int Stats_Flag;EXTERN int User_Data_Flag;EXTERN int Main_Bitstream_Flag;/* filenames */EXTERN char *Output_Picture_Filename;EXTERN char *Substitute_Picture_Filename;EXTERN char *Main_Bitstream_Filename; EXTERN char *Enhancement_Layer_Bitstream_Filename; /* buffers for multiuse purposes */EXTERN char Error_Text[256];EXTERN unsigned char *Clip;/* pointers to generic picture buffers */EXTERN unsigned char *backward_reference_frame[3];EXTERN unsigned char *forward_reference_frame[3];EXTERN unsigned char *auxframe[3];EXTERN unsigned char *current_frame[3];EXTERN unsigned char *substitute_frame[3];/* pointers to scalability picture buffers */EXTERN unsigned char *llframe0[3];EXTERN unsigned char *llframe1[3];EXTERN short *lltmp;EXTERN char *Lower_Layer_Picture_Filename;/* non-normative variables derived from normative elements */EXTERN int Coded_Picture_Width;EXTERN int Coded_Picture_Height;EXTERN int Chroma_Width;EXTERN int Chroma_Height;EXTERN int block_count;EXTERN int Second_Field;EXTERN int profile, level;/* normative derived variables (as per ISO/IEC 13818-2) */EXTERN int horizontal_size;EXTERN int vertical_size;EXTERN int mb_width;EXTERN int mb_height;EXTERN double bit_rate;EXTERN double frame_rate; /* headers *//* ISO/IEC 13818-2 section 6.2.2.1:  sequence_header() */EXTERN int aspect_ratio_information;EXTERN int frame_rate_code; EXTERN int bit_rate_value; EXTERN int vbv_buffer_size;EXTERN int constrained_parameters_flag;/* ISO/IEC 13818-2 section 6.2.2.3:  sequence_extension() */EXTERN int profile_and_level_indication;EXTERN int progressive_sequence;EXTERN int chroma_format;EXTERN int low_delay;EXTERN int frame_rate_extension_n;EXTERN int frame_rate_extension_d;/* ISO/IEC 13818-2 section 6.2.2.4:  sequence_display_extension() */EXTERN int video_format;  EXTERN int color_description;EXTERN int color_primaries;EXTERN int transfer_characteristics;EXTERN int matrix_coefficients;EXTERN int display_horizontal_size;EXTERN int display_vertical_size;/* ISO/IEC 13818-2 section 6.2.3: picture_header() */EXTERN int temporal_reference;EXTERN int picture_coding_type;EXTERN int vbv_delay;EXTERN int full_pel_forward_vector;EXTERN int forward_f_code;EXTERN int full_pel_backward_vector;EXTERN int backward_f_code;/* ISO/IEC 13818-2 section 6.2.3.1: picture_coding_extension() header */EXTERN int f_code[2][2];EXTERN int intra_dc_precision;EXTERN int picture_structure;EXTERN int top_field_first;EXTERN int frame_pred_frame_dct;EXTERN int concealment_motion_vectors;EXTERN int intra_vlc_format;EXTERN int repeat_first_field;EXTERN int chroma_420_type;EXTERN int progressive_frame;EXTERN int composite_display_flag;EXTERN int v_axis;EXTERN int field_sequence;EXTERN int sub_carrier;EXTERN int burst_amplitude;EXTERN int sub_carrier_phase;/* ISO/IEC 13818-2 section 6.2.3.3: picture_display_extension() header */EXTERN int frame_center_horizontal_offset[3];EXTERN int frame_center_vertical_offset[3];/* ISO/IEC 13818-2 section 6.2.2.5: sequence_scalable_extension() header */EXTERN int layer_id;EXTERN int lower_layer_prediction_horizontal_size;EXTERN int lower_layer_prediction_vertical_size;EXTERN int horizontal_subsampling_factor_m;EXTERN int horizontal_subsampling_factor_n;EXTERN int vertical_subsampling_factor_m;EXTERN int vertical_subsampling_factor_n;/* ISO/IEC 13818-2 section 6.2.3.5: picture_spatial_scalable_extension() header */EXTERN int lower_layer_temporal_reference;EXTERN int lower_layer_horizontal_offset;EXTERN int lower_layer_vertical_offset;EXTERN int spatial_temporal_weight_code_table_index;EXTERN int lower_layer_progressive_frame;EXTERN int lower_layer_deinterlaced_field_select;/* ISO/IEC 13818-2 section 6.2.3.6: copyright_extension() header */EXTERN int copyright_flag;EXTERN int copyright_identifier;EXTERN int original_or_copy;EXTERN int copyright_number_1;EXTERN int copyright_number_2;EXTERN int copyright_number_3;/* ISO/IEC 13818-2 section 6.2.2.6: group_of_pictures_header()  */EXTERN int drop_flag;EXTERN int hour;EXTERN int minute;EXTERN int sec;EXTERN int frame;EXTERN int closed_gop;EXTERN int broken_link;/* layer specific variables (needed for SNR and DP scalability) */EXTERN struct layer_data {  /* bit input */  int Infile;  unsigned char Rdbfr[2048];  unsigned char *Rdptr;  unsigned char Inbfr[16];  /* from mpeg2play */  unsigned int Bfr;  unsigned char *Rdmax;  int Incnt;  int Bitcnt;  /* sequence header and quant_matrix_extension() */  int intra_quantizer_matrix[64];  int non_intra_quantizer_matrix[64];  int chroma_intra_quantizer_matrix[64];  int chroma_non_intra_quantizer_matrix[64];    int load_intra_quantizer_matrix;  int load_non_intra_quantizer_matrix;  int load_chroma_intra_quantizer_matrix;  int load_chroma_non_intra_quantizer_matrix;  int MPEG2_Flag;  /* sequence scalable extension */  int scalable_mode;  /* picture coding extension */  int q_scale_type;  int alternate_scan;  /* picture spatial scalable extension */  int pict_scal;  /* slice/macroblock */  int priority_breakpoint;  int quantizer_scale;  int intra_slice;  short block[12][64];} base, enhan, *ld;#ifdef VERIFYEXTERN int verify_sequence_header;EXTERN int verify_group_of_pictures_header;EXTERN int verify_picture_header;EXTERN int verify_slice_header;EXTERN int verify_sequence_extension;EXTERN int verify_sequence_display_extension;EXTERN int verify_quant_matrix_extension;EXTERN int verify_sequence_scalable_extension;EXTERN int verify_picture_display_extension;EXTERN int verify_picture_coding_extension;EXTERN int verify_picture_spatial_scalable_extension;EXTERN int verify_picture_temporal_scalable_extension;EXTERN int verify_copyright_extension;#endif /* VERIFY */EXTERN int Decode_Layer;/* verify.c */#ifdef VERIFYvoid Check_Headers _ANSI_ARGS_((int Bitstream_Framenum, int Sequence_Framenum));void Clear_Verify_Headers _ANSI_ARGS_((void));#endif /* VERIFY */EXTERN int global_MBA;EXTERN int global_pic;EXTERN int True_Framenum;