fbui | Framebuffer-based graphical environment |
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libfbui/MPEG/global.h
1 /* global.h, global variables */
2
3 /* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
4
5 /*
6 * Disclaimer of Warranty
7 *
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.
15 *
16 * This disclaimer of warranty extends to the user of these programs and user's
17 * customers, employees, agents, transferees, successors, and assigns.
18 *
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
21 * patents.
22 *
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
26 * design.
27 *
28 */
29
30 #include "mpeg2dec.h"
31
32 /* choose between declaration (GLOBAL undefined)
33 * and definition (GLOBAL defined)
34 * GLOBAL is defined in exactly one file mpeg2dec.c)
35 */
36
37 #ifndef GLOBAL
38 #define EXTERN extern
39 #else
40 #define EXTERN
41 #endif
42
43 /* prototypes of global functions */
44 /* readpic.c */
45 void Substitute_Frame_Buffer _ANSI_ARGS_ ((int bitstream_framenum,
46 int sequence_framenum));
47
48 /* Get_Bits.c */
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));
57
58 /* systems.c */
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));
63
64
65 /* getblk.c */
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));
70
71 /* gethdr.c */
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));
76
77 /* getpic.c */
78 void Decode_Picture _ANSI_ARGS_((int bitstream_framenum,
79 int sequence_framenum));
80 void Output_Last_Frame_of_Sequence _ANSI_ARGS_((int framenum));
81
82 /* getvlc.c */
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));
90
91 /* idct.c */
92 void Fast_IDCT _ANSI_ARGS_((short *block));
93 void Initialize_Fast_IDCT _ANSI_ARGS_((void));
94
95 /* Reference_IDCT.c */
96 void Initialize_Reference_IDCT _ANSI_ARGS_((void));
97 void Reference_IDCT _ANSI_ARGS_((short *block));
98
99 /* motion.c */
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));
106
107 /* mpeg2dec.c */
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));
111
112 /* recon.c */
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));
116
117 /* spatscal.c */
118 void Spatial_Prediction _ANSI_ARGS_((void));
119
120 /* store.c */
121 void Write_Frame _ANSI_ARGS_((unsigned char *src[], int frame));
122
123 #ifdef DISPLAY
124 /* display.c */
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));
130 #endif
131
132 /* global variables */
133
134 EXTERN char Version[]
135 #ifdef GLOBAL
136 ="mpeg2decode V1.2a, 96/07/19"
137 #endif
138 ;
139
140 EXTERN char Author[]
141 #ifdef GLOBAL
142 ="(C) 1996, MPEG Software Simulation Group"
143 #endif
144 ;
145
146
147 /* zig-zag and alternate scan patterns */
148 EXTERN unsigned char scan[2][64]
149 #ifdef GLOBAL
150 =
151 {
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
157 },
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
163 }
164 }
165 #endif
166 ;
167
168 /* default intra quantization matrix */
169 EXTERN unsigned char default_intra_quantizer_matrix[64]
170 #ifdef GLOBAL
171 =
172 {
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
181 }
182 #endif
183 ;
184
185 /* non-linear quantization coefficient table */
186 EXTERN unsigned char Non_Linear_quantizer_scale[32]
187 #ifdef GLOBAL
188 =
189 {
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
194 }
195 #endif
196 ;
197
198 /* color space conversion coefficients
199 * for YCbCr -> RGB mapping
200 *
201 * entries are {crv,cbu,cgu,cgv}
202 *
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
207 *
208 * where Y=cr*R+cg*G+cb*B (cr+cg+cb=1)
209 */
210
211 /* ISO/IEC 13818-2 section 6.3.6 sequence_display_extension() */
212
213 EXTERN int Inverse_Table_6_9[8][4]
214 #ifdef GLOBAL
215 =
216 {
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) */
225 }
226 #endif
227 ;
228
229
230
231
232
233 /* output types (Output_Type) */
234 #define T_YUV 0
235 #define T_SIF 1
236 #define T_TGA 2
237 #define T_PPM 3
238 #define T_X11 4
239 #define T_X11HIQ 5
240 #define T_FBUI 6
241
242 /* decoder operation control variables */
243 EXTERN int Output_Type;
244 EXTERN int hiQdither;
245
246 /* decoder operation control flags */
247 EXTERN int Quiet_Flag;
248 EXTERN int Trace_Flag;
249 EXTERN int Fault_Flag;
250 EXTERN int Verbose_Flag;
251 EXTERN int Two_Streams;
252 EXTERN int Spatial_Flag;
253 EXTERN int Reference_IDCT_Flag;
254 EXTERN int Frame_Store_Flag;
255 EXTERN int System_Stream_Flag;
256 EXTERN int Display_Progressive_Flag;
257 EXTERN int Ersatz_Flag;
258 EXTERN int Big_Picture_Flag;
259 EXTERN int Verify_Flag;
260 EXTERN int Stats_Flag;
261 EXTERN int User_Data_Flag;
262 EXTERN int Main_Bitstream_Flag;
263
264
265 /* filenames */
266 EXTERN char *Output_Picture_Filename;
267 EXTERN char *Substitute_Picture_Filename;
268 EXTERN char *Main_Bitstream_Filename;
269 EXTERN char *Enhancement_Layer_Bitstream_Filename;
270
271
272 /* buffers for multiuse purposes */
273 EXTERN char Error_Text[256];
274 EXTERN unsigned char *Clip;
275
276 /* pointers to generic picture buffers */
277 EXTERN unsigned char *backward_reference_frame[3];
278 EXTERN unsigned char *forward_reference_frame[3];
279
280 EXTERN unsigned char *auxframe[3];
281 EXTERN unsigned char *current_frame[3];
282 EXTERN unsigned char *substitute_frame[3];
283
284
285 /* pointers to scalability picture buffers */
286 EXTERN unsigned char *llframe0[3];
287 EXTERN unsigned char *llframe1[3];
288
289 EXTERN short *lltmp;
290 EXTERN char *Lower_Layer_Picture_Filename;
291
292
293
294
295 /* non-normative variables derived from normative elements */
296 EXTERN int Coded_Picture_Width;
297 EXTERN int Coded_Picture_Height;
298 EXTERN int Chroma_Width;
299 EXTERN int Chroma_Height;
300 EXTERN int block_count;
301 EXTERN int Second_Field;
302 EXTERN int profile, level;
303
304 /* normative derived variables (as per ISO/IEC 13818-2) */
305 EXTERN int horizontal_size;
306 EXTERN int vertical_size;
307 EXTERN int mb_width;
308 EXTERN int mb_height;
309 EXTERN double bit_rate;
310 EXTERN double frame_rate;
311
312
313
314 /* headers */
315
316 /* ISO/IEC 13818-2 section 6.2.2.1: sequence_header() */
317 EXTERN int aspect_ratio_information;
318 EXTERN int frame_rate_code;
319 EXTERN int bit_rate_value;
320 EXTERN int vbv_buffer_size;
321 EXTERN int constrained_parameters_flag;
322
323 /* ISO/IEC 13818-2 section 6.2.2.3: sequence_extension() */
324 EXTERN int profile_and_level_indication;
325 EXTERN int progressive_sequence;
326 EXTERN int chroma_format;
327 EXTERN int low_delay;
328 EXTERN int frame_rate_extension_n;
329 EXTERN int frame_rate_extension_d;
330
331 /* ISO/IEC 13818-2 section 6.2.2.4: sequence_display_extension() */
332 EXTERN int video_format;
333 EXTERN int color_description;
334 EXTERN int color_primaries;
335 EXTERN int transfer_characteristics;
336 EXTERN int matrix_coefficients;
337 EXTERN int display_horizontal_size;
338 EXTERN int display_vertical_size;
339
340 /* ISO/IEC 13818-2 section 6.2.3: picture_header() */
341 EXTERN int temporal_reference;
342 EXTERN int picture_coding_type;
343 EXTERN int vbv_delay;
344 EXTERN int full_pel_forward_vector;
345 EXTERN int forward_f_code;
346 EXTERN int full_pel_backward_vector;
347 EXTERN int backward_f_code;
348
349
350 /* ISO/IEC 13818-2 section 6.2.3.1: picture_coding_extension() header */
351 EXTERN int f_code[2][2];
352 EXTERN int intra_dc_precision;
353 EXTERN int picture_structure;
354 EXTERN int top_field_first;
355 EXTERN int frame_pred_frame_dct;
356 EXTERN int concealment_motion_vectors;
357
358 EXTERN int intra_vlc_format;
359
360 EXTERN int repeat_first_field;
361
362 EXTERN int chroma_420_type;
363 EXTERN int progressive_frame;
364 EXTERN int composite_display_flag;
365 EXTERN int v_axis;
366 EXTERN int field_sequence;
367 EXTERN int sub_carrier;
368 EXTERN int burst_amplitude;
369 EXTERN int sub_carrier_phase;
370
371
372
373 /* ISO/IEC 13818-2 section 6.2.3.3: picture_display_extension() header */
374 EXTERN int frame_center_horizontal_offset[3];
375 EXTERN int frame_center_vertical_offset[3];
376
377
378
379 /* ISO/IEC 13818-2 section 6.2.2.5: sequence_scalable_extension() header */
380 EXTERN int layer_id;
381 EXTERN int lower_layer_prediction_horizontal_size;
382 EXTERN int lower_layer_prediction_vertical_size;
383 EXTERN int horizontal_subsampling_factor_m;
384 EXTERN int horizontal_subsampling_factor_n;
385 EXTERN int vertical_subsampling_factor_m;
386 EXTERN int vertical_subsampling_factor_n;
387
388
389 /* ISO/IEC 13818-2 section 6.2.3.5: picture_spatial_scalable_extension() header */
390 EXTERN int lower_layer_temporal_reference;
391 EXTERN int lower_layer_horizontal_offset;
392 EXTERN int lower_layer_vertical_offset;
393 EXTERN int spatial_temporal_weight_code_table_index;
394 EXTERN int lower_layer_progressive_frame;
395 EXTERN int lower_layer_deinterlaced_field_select;
396
397
398
399
400
401
402 /* ISO/IEC 13818-2 section 6.2.3.6: copyright_extension() header */
403 EXTERN int copyright_flag;
404 EXTERN int copyright_identifier;
405 EXTERN int original_or_copy;
406 EXTERN int copyright_number_1;
407 EXTERN int copyright_number_2;
408 EXTERN int copyright_number_3;
409
410 /* ISO/IEC 13818-2 section 6.2.2.6: group_of_pictures_header() */
411 EXTERN int drop_flag;
412 EXTERN int hour;
413 EXTERN int minute;
414 EXTERN int sec;
415 EXTERN int frame;
416 EXTERN int closed_gop;
417 EXTERN int broken_link;
418
419
420
421 /* layer specific variables (needed for SNR and DP scalability) */
422 EXTERN struct layer_data {
423 /* bit input */
424 int Infile;
425 unsigned char Rdbfr[2048];
426 unsigned char *Rdptr;
427 unsigned char Inbfr[16];
428 /* from mpeg2play */
429 unsigned int Bfr;
430 unsigned char *Rdmax;
431 int Incnt;
432 int Bitcnt;
433 /* sequence header and quant_matrix_extension() */
434 int intra_quantizer_matrix[64];
435 int non_intra_quantizer_matrix[64];
436 int chroma_intra_quantizer_matrix[64];
437 int chroma_non_intra_quantizer_matrix[64];
438
439 int load_intra_quantizer_matrix;
440 int load_non_intra_quantizer_matrix;
441 int load_chroma_intra_quantizer_matrix;
442 int load_chroma_non_intra_quantizer_matrix;
443
444 int MPEG2_Flag;
445 /* sequence scalable extension */
446 int scalable_mode;
447 /* picture coding extension */
448 int q_scale_type;
449 int alternate_scan;
450 /* picture spatial scalable extension */
451 int pict_scal;
452 /* slice/macroblock */
453 int priority_breakpoint;
454 int quantizer_scale;
455 int intra_slice;
456 short block[12][64];
457 } base, enhan, *ld;
458
459
460
461 #ifdef VERIFY
462 EXTERN int verify_sequence_header;
463 EXTERN int verify_group_of_pictures_header;
464 EXTERN int verify_picture_header;
465 EXTERN int verify_slice_header;
466 EXTERN int verify_sequence_extension;
467 EXTERN int verify_sequence_display_extension;
468 EXTERN int verify_quant_matrix_extension;
469 EXTERN int verify_sequence_scalable_extension;
470 EXTERN int verify_picture_display_extension;
471 EXTERN int verify_picture_coding_extension;
472 EXTERN int verify_picture_spatial_scalable_extension;
473 EXTERN int verify_picture_temporal_scalable_extension;
474 EXTERN int verify_copyright_extension;
475 #endif /* VERIFY */
476
477
478 EXTERN int Decode_Layer;
479
480 /* verify.c */
481 #ifdef VERIFY
482 void Check_Headers _ANSI_ARGS_((int Bitstream_Framenum, int Sequence_Framenum));
483 void Clear_Verify_Headers _ANSI_ARGS_((void));
484 #endif /* VERIFY */
485
486
487 EXTERN int global_MBA;
488 EXTERN int global_pic;
489 EXTERN int True_Framenum;
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