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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);