1 /* global.h, global variables */
3 /* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
6 * Disclaimer of Warranty
8 * These software programs are available to the user without any license fee or
9 * royalty on an "as is" basis. The MPEG Software Simulation Group disclaims
10 * any and all warranties, whether express, implied, or statuary, including any
11 * implied warranties or merchantability or of fitness for a particular
12 * purpose. In no event shall the copyright-holder be liable for any
13 * incidental, punitive, or consequential damages of any kind whatsoever
14 * arising from the use of these programs.
16 * This disclaimer of warranty extends to the user of these programs and user's
17 * customers, employees, agents, transferees, successors, and assigns.
19 * The MPEG Software Simulation Group does not represent or warrant that the
20 * programs furnished hereunder are free of infringement of any third-party
23 * Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
24 * are subject to royalty fees to patent holders. Many of these patents are
25 * general enough such that they are unavoidable regardless of implementation
32 /* choose between declaration (GLOBAL undefined)
33 * and definition (GLOBAL defined)
34 * GLOBAL is defined in exactly one file mpeg2dec.c)
43 /* prototypes of global functions */
45 void Substitute_Frame_Buffer _ANSI_ARGS_ ((int bitstream_framenum,
46 int sequence_framenum));
49 void Initialize_Buffer _ANSI_ARGS_((void));
50 void Fill_Buffer _ANSI_ARGS_((void));
51 unsigned int Show_Bits _ANSI_ARGS_((int n));
52 unsigned int Get_Bits1 _ANSI_ARGS_((void));
53 void Flush_Buffer _ANSI_ARGS_((int n));
54 unsigned int Get_Bits _ANSI_ARGS_((int n));
55 int Get_Byte _ANSI_ARGS_((void));
56 int Get_Word _ANSI_ARGS_((void));
59 void Next_Packet _ANSI_ARGS_((void));
60 int Get_Long _ANSI_ARGS_((void));
61 void Flush_Buffer32 _ANSI_ARGS_((void));
62 unsigned int Get_Bits32 _ANSI_ARGS_((void));
66 void Decode_MPEG1_Intra_Block _ANSI_ARGS_((int comp, int dc_dct_pred[]));
67 void Decode_MPEG1_Non_Intra_Block _ANSI_ARGS_((int comp));
68 void Decode_MPEG2_Intra_Block _ANSI_ARGS_((int comp, int dc_dct_pred[]));
69 void Decode_MPEG2_Non_Intra_Block _ANSI_ARGS_((int comp));
72 int Get_Hdr _ANSI_ARGS_((void));
73 void next_start_code _ANSI_ARGS_((void));
74 int slice_header _ANSI_ARGS_((void));
75 void marker_bit _ANSI_ARGS_((char *text));
78 void Decode_Picture _ANSI_ARGS_((int bitstream_framenum,
79 int sequence_framenum));
80 void Output_Last_Frame_of_Sequence _ANSI_ARGS_((int framenum));
83 int Get_macroblock_type _ANSI_ARGS_((void));
84 int Get_motion_code _ANSI_ARGS_((void));
85 int Get_dmvector _ANSI_ARGS_((void));
86 int Get_coded_block_pattern _ANSI_ARGS_((void));
87 int Get_macroblock_address_increment _ANSI_ARGS_((void));
88 int Get_Luma_DC_dct_diff _ANSI_ARGS_((void));
89 int Get_Chroma_DC_dct_diff _ANSI_ARGS_((void));
92 void Fast_IDCT _ANSI_ARGS_((short *block));
93 void Initialize_Fast_IDCT _ANSI_ARGS_((void));
95 /* Reference_IDCT.c */
96 void Initialize_Reference_IDCT _ANSI_ARGS_((void));
97 void Reference_IDCT _ANSI_ARGS_((short *block));
100 void motion_vectors _ANSI_ARGS_((int PMV[2][2][2], int dmvector[2],
101 int motion_vertical_field_select[2][2], int s, int motion_vector_count,
102 int mv_format, int h_r_size, int v_r_size, int dmv, int mvscale));
103 void motion_vector _ANSI_ARGS_((int *PMV, int *dmvector,
104 int h_r_size, int v_r_size, int dmv, int mvscale, int full_pel_vector));
105 void Dual_Prime_Arithmetic _ANSI_ARGS_((int DMV[][2], int *dmvector, int mvx, int mvy));
108 void Error _ANSI_ARGS_((char *text));
109 void Warning _ANSI_ARGS_((char *text));
110 void Print_Bits _ANSI_ARGS_((int code, int bits, int len));
113 void form_predictions _ANSI_ARGS_((int bx, int by, int macroblock_type,
114 int motion_type, int PMV[2][2][2], int motion_vertical_field_select[2][2],
115 int dmvector[2], int stwtype));
118 void Spatial_Prediction _ANSI_ARGS_((void));
121 void Write_Frame _ANSI_ARGS_((unsigned char *src[], int frame));
125 void Initialize_Display_Process _ANSI_ARGS_((char *name));
126 void Terminate_Display_Process _ANSI_ARGS_((void));
127 void Display_Second_Field _ANSI_ARGS_((void));
128 void dither _ANSI_ARGS_((unsigned char *src[]));
129 void Initialize_Dither_Matrix _ANSI_ARGS_((void));
132 /* global variables */
134 EXTERN char Version[]
136 ="mpeg2decode V1.2a, 96/07/19"
142 ="(C) 1996, MPEG Software Simulation Group"
147 /* zig-zag and alternate scan patterns */
148 EXTERN unsigned char scan[2][64]
152 { /* Zig-Zag scan pattern */
153 0,1,8,16,9,2,3,10,17,24,32,25,18,11,4,5,
154 12,19,26,33,40,48,41,34,27,20,13,6,7,14,21,28,
155 35,42,49,56,57,50,43,36,29,22,15,23,30,37,44,51,
156 58,59,52,45,38,31,39,46,53,60,61,54,47,55,62,63
158 { /* Alternate scan pattern */
159 0,8,16,24,1,9,2,10,17,25,32,40,48,56,57,49,
160 41,33,26,18,3,11,4,12,19,27,34,42,50,58,35,43,
161 51,59,20,28,5,13,6,14,21,29,36,44,52,60,37,45,
162 53,61,22,30,7,15,23,31,38,46,54,62,39,47,55,63
168 /* default intra quantization matrix */
169 EXTERN unsigned char default_intra_quantizer_matrix[64]
173 8, 16, 19, 22, 26, 27, 29, 34,
174 16, 16, 22, 24, 27, 29, 34, 37,
175 19, 22, 26, 27, 29, 34, 34, 38,
176 22, 22, 26, 27, 29, 34, 37, 40,
177 22, 26, 27, 29, 32, 35, 40, 48,
178 26, 27, 29, 32, 35, 40, 48, 58,
179 26, 27, 29, 34, 38, 46, 56, 69,
180 27, 29, 35, 38, 46, 56, 69, 83
185 /* non-linear quantization coefficient table */
186 EXTERN unsigned char Non_Linear_quantizer_scale[32]
190 0, 1, 2, 3, 4, 5, 6, 7,
191 8,10,12,14,16,18,20,22,
192 24,28,32,36,40,44,48,52,
193 56,64,72,80,88,96,104,112
198 /* color space conversion coefficients
199 * for YCbCr -> RGB mapping
201 * entries are {crv,cbu,cgu,cgv}
203 * crv=(255/224)*65536*(1-cr)/0.5
204 * cbu=(255/224)*65536*(1-cb)/0.5
205 * cgu=(255/224)*65536*(cb/cg)*(1-cb)/0.5
206 * cgv=(255/224)*65536*(cr/cg)*(1-cr)/0.5
208 * where Y=cr*R+cg*G+cb*B (cr+cg+cb=1)
211 /* ISO/IEC 13818-2 section 6.3.6 sequence_display_extension() */
213 EXTERN int Inverse_Table_6_9[8][4]
217 {117504, 138453, 13954, 34903}, /* no sequence_display_extension */
218 {117504, 138453, 13954, 34903}, /* ITU-R Rec. 709 (1990) */
219 {104597, 132201, 25675, 53279}, /* unspecified */
220 {104597, 132201, 25675, 53279}, /* reserved */
221 {104448, 132798, 24759, 53109}, /* FCC */
222 {104597, 132201, 25675, 53279}, /* ITU-R Rec. 624-4 System B, G */
223 {104597, 132201, 25675, 53279}, /* SMPTE 170M */
224 {117579, 136230, 16907, 35559} /* SMPTE 240M (1987) */
233 /* output types (Output_Type) */
241 /* decoder operation control variables */
242 EXTERN int Output_Type;
243 EXTERN int hiQdither;
245 /* decoder operation control flags */
246 EXTERN int Quiet_Flag;
247 EXTERN int Trace_Flag;
248 EXTERN int Fault_Flag;
249 EXTERN int Verbose_Flag;
250 EXTERN int Two_Streams;
251 EXTERN int Spatial_Flag;
252 EXTERN int Reference_IDCT_Flag;
253 EXTERN int Frame_Store_Flag;
254 EXTERN int System_Stream_Flag;
255 EXTERN int Display_Progressive_Flag;
256 EXTERN int Ersatz_Flag;
257 EXTERN int Big_Picture_Flag;
258 EXTERN int Verify_Flag;
259 EXTERN int Stats_Flag;
260 EXTERN int User_Data_Flag;
261 EXTERN int Main_Bitstream_Flag;
265 EXTERN char *Output_Picture_Filename;
266 EXTERN char *Substitute_Picture_Filename;
267 EXTERN char *Main_Bitstream_Filename;
268 EXTERN char *Enhancement_Layer_Bitstream_Filename;
271 /* buffers for multiuse purposes */
272 EXTERN char Error_Text[256];
273 EXTERN unsigned char *Clip;
275 /* pointers to generic picture buffers */
276 EXTERN unsigned char *backward_reference_frame[3];
277 EXTERN unsigned char *forward_reference_frame[3];
279 EXTERN unsigned char *auxframe[3];
280 EXTERN unsigned char *current_frame[3];
281 EXTERN unsigned char *substitute_frame[3];
284 /* pointers to scalability picture buffers */
285 EXTERN unsigned char *llframe0[3];
286 EXTERN unsigned char *llframe1[3];
289 EXTERN char *Lower_Layer_Picture_Filename;
294 /* non-normative variables derived from normative elements */
295 EXTERN int Coded_Picture_Width;
296 EXTERN int Coded_Picture_Height;
297 EXTERN int Chroma_Width;
298 EXTERN int Chroma_Height;
299 EXTERN int block_count;
300 EXTERN int Second_Field;
301 EXTERN int profile, level;
303 /* normative derived variables (as per ISO/IEC 13818-2) */
304 EXTERN int horizontal_size;
305 EXTERN int vertical_size;
307 EXTERN int mb_height;
308 EXTERN double bit_rate;
309 EXTERN double frame_rate;
315 /* ISO/IEC 13818-2 section 6.2.2.1: sequence_header() */
316 EXTERN int aspect_ratio_information;
317 EXTERN int frame_rate_code;
318 EXTERN int bit_rate_value;
319 EXTERN int vbv_buffer_size;
320 EXTERN int constrained_parameters_flag;
322 /* ISO/IEC 13818-2 section 6.2.2.3: sequence_extension() */
323 EXTERN int profile_and_level_indication;
324 EXTERN int progressive_sequence;
325 EXTERN int chroma_format;
326 EXTERN int low_delay;
327 EXTERN int frame_rate_extension_n;
328 EXTERN int frame_rate_extension_d;
330 /* ISO/IEC 13818-2 section 6.2.2.4: sequence_display_extension() */
331 EXTERN int video_format;
332 EXTERN int color_description;
333 EXTERN int color_primaries;
334 EXTERN int transfer_characteristics;
335 EXTERN int matrix_coefficients;
336 EXTERN int display_horizontal_size;
337 EXTERN int display_vertical_size;
339 /* ISO/IEC 13818-2 section 6.2.3: picture_header() */
340 EXTERN int temporal_reference;
341 EXTERN int picture_coding_type;
342 EXTERN int vbv_delay;
343 EXTERN int full_pel_forward_vector;
344 EXTERN int forward_f_code;
345 EXTERN int full_pel_backward_vector;
346 EXTERN int backward_f_code;
349 /* ISO/IEC 13818-2 section 6.2.3.1: picture_coding_extension() header */
350 EXTERN int f_code[2][2];
351 EXTERN int intra_dc_precision;
352 EXTERN int picture_structure;
353 EXTERN int top_field_first;
354 EXTERN int frame_pred_frame_dct;
355 EXTERN int concealment_motion_vectors;
357 EXTERN int intra_vlc_format;
359 EXTERN int repeat_first_field;
361 EXTERN int chroma_420_type;
362 EXTERN int progressive_frame;
363 EXTERN int composite_display_flag;
365 EXTERN int field_sequence;
366 EXTERN int sub_carrier;
367 EXTERN int burst_amplitude;
368 EXTERN int sub_carrier_phase;
372 /* ISO/IEC 13818-2 section 6.2.3.3: picture_display_extension() header */
373 EXTERN int frame_center_horizontal_offset[3];
374 EXTERN int frame_center_vertical_offset[3];
378 /* ISO/IEC 13818-2 section 6.2.2.5: sequence_scalable_extension() header */
380 EXTERN int lower_layer_prediction_horizontal_size;
381 EXTERN int lower_layer_prediction_vertical_size;
382 EXTERN int horizontal_subsampling_factor_m;
383 EXTERN int horizontal_subsampling_factor_n;
384 EXTERN int vertical_subsampling_factor_m;
385 EXTERN int vertical_subsampling_factor_n;
388 /* ISO/IEC 13818-2 section 6.2.3.5: picture_spatial_scalable_extension() header */
389 EXTERN int lower_layer_temporal_reference;
390 EXTERN int lower_layer_horizontal_offset;
391 EXTERN int lower_layer_vertical_offset;
392 EXTERN int spatial_temporal_weight_code_table_index;
393 EXTERN int lower_layer_progressive_frame;
394 EXTERN int lower_layer_deinterlaced_field_select;
401 /* ISO/IEC 13818-2 section 6.2.3.6: copyright_extension() header */
402 EXTERN int copyright_flag;
403 EXTERN int copyright_identifier;
404 EXTERN int original_or_copy;
405 EXTERN int copyright_number_1;
406 EXTERN int copyright_number_2;
407 EXTERN int copyright_number_3;
409 /* ISO/IEC 13818-2 section 6.2.2.6: group_of_pictures_header() */
410 EXTERN int drop_flag;
415 EXTERN int closed_gop;
416 EXTERN int broken_link;
421 #include <sys/types.h>
426 /* layer specific variables (needed for SNR and DP scalability) */
427 EXTERN struct layer_data {
430 int (*open_stream) (char *filename);
431 off_t (*seek_stream) (int infile, off_t offset,int whence);
432 ssize_t (*read_stream) (int infile, void *buf, size_t count);
433 int (*close_stream) (int infile);
434 unsigned char Rdbfr[2048];
435 unsigned char *Rdptr;
436 unsigned char Inbfr[16];
439 unsigned char *Rdmax;
442 /* sequence header and quant_matrix_extension() */
443 int intra_quantizer_matrix[64];
444 int non_intra_quantizer_matrix[64];
445 int chroma_intra_quantizer_matrix[64];
446 int chroma_non_intra_quantizer_matrix[64];
448 int load_intra_quantizer_matrix;
449 int load_non_intra_quantizer_matrix;
450 int load_chroma_intra_quantizer_matrix;
451 int load_chroma_non_intra_quantizer_matrix;
454 /* sequence scalable extension */
456 /* picture coding extension */
459 /* picture spatial scalable extension */
461 /* slice/macroblock */
462 int priority_breakpoint;
471 EXTERN int verify_sequence_header;
472 EXTERN int verify_group_of_pictures_header;
473 EXTERN int verify_picture_header;
474 EXTERN int verify_slice_header;
475 EXTERN int verify_sequence_extension;
476 EXTERN int verify_sequence_display_extension;
477 EXTERN int verify_quant_matrix_extension;
478 EXTERN int verify_sequence_scalable_extension;
479 EXTERN int verify_picture_display_extension;
480 EXTERN int verify_picture_coding_extension;
481 EXTERN int verify_picture_spatial_scalable_extension;
482 EXTERN int verify_picture_temporal_scalable_extension;
483 EXTERN int verify_copyright_extension;
487 EXTERN int Decode_Layer;
491 void Check_Headers _ANSI_ARGS_((int Bitstream_Framenum, int Sequence_Framenum));
492 void Clear_Verify_Headers _ANSI_ARGS_((void));
496 EXTERN int global_MBA;
497 EXTERN int global_pic;
498 EXTERN int True_Framenum;