/* 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_((const 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_((const 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 FreeStaticBuffer _ANSI_ARGS_((void)); 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 const char *Output_Picture_Filename; EXTERN const char *Substitute_Picture_Filename; EXTERN const char *Main_Bitstream_Filename; EXTERN const 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 const 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 */ istream *Infile; /* int (*open_stream) (char *filename);*/ off_t (*seek_stream) (istream *is, off_t offset,int whence); ssize_t (*read_stream) (istream *is, void *buf, size_t count); int (*close_stream) (istream *is); 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;