global.h
来自「mpeg2编码解码源程序代码」· C头文件 代码 · 共 1,165 行 · 第 1/3 页
H
1,165 行
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}
#endif
;
////////////////////////
/* prototypes of global functions *//* readpic.c */void Substitute_Frame_Buffer (int bitstream_framenum, int sequence_framenum);/* Get_Bits.c */void Initialize_Buffer (void);void Fill_Buffer (void);void Flush_Buffer (int n);/* systems.c */void Next_Packet (void);void Flush_Buffer32 (void);/* getblk.c */void Decode_MPEG1_Intra_Block (int comp, int dc_dct_pred[]);void Decode_MPEG1_Non_Intra_Block (int comp);void Decode_MPEG2_Intra_Block (int comp, int dc_dct_pred[]);void Decode_MPEG2_Non_Intra_Block (int comp);/* gethdr.c */int Get_Hdr (void);void next_start_code (void);int slice_header (void);void marker_bit (char *text);/* getpic.c */void Decode_Picture (int bitstream_framenum, int sequence_framenum,unsigned char*dst);void Output_Last_Frame_of_Sequence (int framenum,unsigned char *dst);/* getvlc.c */int Get_macroblock_type (void);int Get_motion_code (void);int Get_dmvector (void);int Get_coded_block_pattern (void);int Get_macroblock_address_increment (void);int Get_Luma_DC_dct_diff (void);int Get_Chroma_DC_dct_diff (void);/* idct.c */extern void Fast_IDCT (short *block);extern void Initialize_Fast_IDCT (void);extern void MMX_IDCT(short *block); //
/* Reference_IDCT.c */void Initialize_Reference_IDCT (void);void Reference_IDCT (short *block);/* motion.c */void motion_vectors (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 (int *PMV, int *dmvector, int h_r_size, int v_r_size, int dmv, int mvscale, int full_pel_vector);void Dual_Prime_Arithmetic (int DMV[][2], int *dmvector, int mvx, int mvy);/* mpeg2dec.c */void Error (char *text);void Warning (char *text);void Print_Bits (int code, int bits, int len);
int MpegDec(CString infile,CString outfile);
int MpegDecM(CString infile,unsigned char *dst, int framenum,int frameno);
void Decode_BitstreamHead(CString infile);
BOOL Decode_BitstreamFrame(unsigned char *dst);
void Decode_BitstreamEnd();
////////////////////////
HANDLE OpenMpeg2(char* infile, void *callback);
short DecodeMpeg2(HANDLE hDecode, unsigned char *dst, long framenum1,long frameno,short Mode,long stride);
void GetHeader1(HANDLE hDecode);
void CloseMpeg2(HANDLE hDecode);
void GetTotal(HANDLE hDecode,long* total);
/////////
/* recon.c */void form_predictions (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 (void);/* store.c */void Write_Frame (unsigned char *src[], int frame);#ifdef DISPLAY/* display.c */void Initialize_Display_Process (char *name);void Terminate_Display_Process (void);void Display_Second_Field (void);void dither (unsigned char *src[]);void Initialize_Dither_Matrix (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 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;
EXTERN int Fault_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;⌨️ 快捷键说明
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