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/* 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 VERIFY

EXTERN 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 VERIFY

void 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;

// PJ

void gvideo_init(void);

// Insertion/removal from display buffer

// number of preallocated frames

#define MAX_FRAMEBUF 20

struct framebuf_struct {

  int n;

  WORD *f;

  struct framebuf_struct *next;

  struct framebuf_struct *prev;

};

void Initialize_framebuf(int sz);

struct framebuf_struct *get_free_framebuf();

void insert_frame(struct framebuf_struct *f);

struct framebuf_struct *remove_frame();

void give_back_framebuf(struct framebuf_struct *f);

void init_jetcontrol(void);