1 /*****************************************************************************
2 * vpar_blocks.c : blocks parsing
4 *****************************************************************************/
6 /*****************************************************************************
8 *****************************************************************************/
16 #include <X11/extensions/XShm.h>
21 #include "vlc_thread.h"
24 #include "debug.h" /* ?? temporaire, requis par netlist.h */
27 #include "input_netlist.h"
28 #include "decoder_fifo.h"
30 #include "video_output.h"
32 #include "vdec_idct.h"
33 #include "video_decoder.h"
34 #include "vdec_motion.h"
36 #include "vpar_blocks.h"
37 #include "vpar_headers.h"
38 #include "video_fifo.h"
39 #include "vpar_synchro.h"
40 #include "video_parser.h"
45 static __inline__ void InitMacroblock( vpar_thread_t * p_vpar,
46 macroblock_t * p_mb );
47 static __inline__ int MacroblockAddressIncrement( vpar_thread_t * p_vpar );
48 static __inline__ void MacroblockModes( vpar_thread_t * p_vpar,
49 macroblock_t * p_mb );
50 typedef void (*f_decode_block_t)( vpar_thread_t *, macroblock_t *, int );
51 static void vpar_DecodeMPEG1Non( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b );
52 static void vpar_DecodeMPEG1Intra( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b );
53 static void vpar_DecodeMPEG2Non( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b );
54 static void vpar_DecodeMPEG2Intra( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b );
57 * Initialisation tables
59 /* Table for coded_block_pattern resolution */
60 lookup_t pl_coded_pattern_init_table[512] =
61 { {MB_ERROR, 0}, {0, 9}, {39, 9}, {27, 9}, {59, 9}, {55, 9}, {47, 9}, {31, 9},
62 {58, 8}, {58, 8}, {54, 8}, {54, 8}, {46, 8}, {46, 8}, {30, 8}, {30, 8},
63 {57, 8}, {57, 8}, {53, 8}, {53, 8}, {45, 8}, {45, 8}, {29, 8}, {29, 8},
64 {38, 8}, {38, 8}, {26, 8}, {26, 8}, {37, 8}, {37, 8}, {25, 8}, {25, 8},
65 {43, 8}, {43, 8}, {23, 8}, {23, 8}, {51, 8}, {51, 8}, {15, 8}, {15, 8},
66 {42, 8}, {42, 8}, {22, 8}, {22, 8}, {50, 8}, {50, 8}, {14, 8}, {14, 8},
67 {41, 8}, {41, 8}, {21, 8}, {21, 8}, {49, 8}, {49, 8}, {13, 8}, {13, 8},
68 {35, 8}, {35, 8}, {19, 8}, {19, 8}, {11, 8}, {11, 8}, {7, 8}, {7, 8},
69 {34, 7}, {34, 7}, {34, 7}, {34, 7}, {18, 7}, {18, 7}, {18, 7}, {18, 7},
70 {10, 7}, {10, 7}, {10, 7}, {10, 7}, {6, 7}, {6, 7}, {6, 7}, {6, 7},
71 {33, 7}, {33, 7}, {33, 7}, {33, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7},
72 {9, 7}, {9, 7}, {9, 7}, {9, 7}, {5, 7}, {5, 7}, {5, 7}, {5, 7},
73 {63, 6}, {63, 6}, {63, 6}, {63, 6}, {63, 6}, {63, 6}, {63, 6}, {63, 6},
74 {3, 6}, {3, 6}, {3, 6}, {3, 6}, {3, 6}, {3, 6}, {3, 6}, {3, 6},
75 {36, 6}, {36, 6}, {36, 6}, {36, 6}, {36, 6}, {36, 6}, {36, 6}, {36, 6},
76 {24, 6}, {24, 6}, {24, 6}, {24, 6}, {24, 6}, {24, 6}, {24, 6}, {24, 6},
77 {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5},
78 {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5},
79 {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5},
80 {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5},
81 {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5},
82 {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5},
83 {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5},
84 {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5},
85 {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5},
86 {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5},
87 {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5},
88 {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5},
89 {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5},
90 {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5},
91 {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5},
92 {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5},
93 {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5},
94 {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5},
95 {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5},
96 {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5},
97 {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5},
98 {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5},
99 {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5},
100 {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5},
101 {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
102 {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
103 {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
104 {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
105 {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
106 {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
107 {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
108 {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
109 {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4},
110 {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4},
111 {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4},
112 {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4},
113 {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4},
114 {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4},
115 {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4},
116 {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4},
117 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
118 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
119 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
120 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
121 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
122 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
123 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
124 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3} };
126 /* Tables for dc DCT coefficients
127 * Tables are cut in two parts to reduce memory occupation
130 /* Table B-12, dct_dc_size_luminance, codes 00xxx ... 11110 */
131 lookup_t pl_dct_dc_lum_init_table_1[32] =
132 { {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
133 {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
134 {0, 3}, {0, 3}, {0, 3}, {0, 3}, {3, 3}, {3, 3}, {3, 3}, {3, 3},
135 {4, 3}, {4, 3}, {4, 3}, {4, 3}, {5, 4}, {5, 4}, {6, 5}, {MB_ERROR, 0}
138 /* Table B-12, dct_dc_size_luminance, codes 111110xxx ... 111111111 */
139 lookup_t pl_dct_dc_lum_init_table_2[32] =
140 { {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6},
141 {8, 7}, {8, 7}, {8, 7}, {8, 7}, {9, 8}, {9, 8}, {10,9}, {11,9},
142 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0},
143 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0},
144 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0},
145 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}
148 /* Table B-13, dct_dc_size_chrominance, codes 00xxx ... 11110 */
149 lookup_t pl_dct_dc_chrom_init_table_1[32] =
150 { {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2},
151 {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
152 {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
153 {3, 3}, {3, 3}, {3, 3}, {3, 3}, {4, 4}, {4, 4}, {5, 5}, {MB_ERROR, 0}
156 /* Table B-13, dct_dc_size_chrominance, codes 111110xxxx ... 1111111111 */
157 lookup_t pl_dct_dc_chrom_init_table_2[32] =
158 { {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
159 {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
160 {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7},
161 {8, 8}, {8, 8}, {8, 8}, {8, 8}, {9, 9}, {9, 9}, {10,10}, {11,10}
164 /* Tables for ac DCT coefficients. There are cut in many parts to save space */
165 /* Table B-14, DCT coefficients table zero,
166 * codes 0100 ... 1xxx (used for first (DC) coefficient)
168 dct_lookup_t pl_DCT_tab_dc[12] =
170 {0,2,4}, {2,1,4}, {1,1,3}, {1,1,3},
171 {0,1,1}, {0,1,1}, {0,1,1}, {0,1,1},
172 {0,1,1}, {0,1,1}, {0,1,1}, {0,1,1}
175 /* Table B-14, DCT coefficients table zero,
176 * codes 0100 ... 1xxx (used for all other coefficients)
178 dct_lookup_t pl_DCT_tab_ac[12] =
180 {0,2,4}, {2,1,4}, {1,1,3}, {1,1,3},
181 {DCT_EOB,0,2}, {DCT_EOB,0,2}, {DCT_EOB,0,2}, {DCT_EOB,0,2}, /* EOB */
182 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2}
185 /* Table B-14, DCT coefficients table zero,
186 * codes 000001xx ... 00111xxx
188 dct_lookup_t pl_DCT_tab0[60] =
190 {DCT_ESCAPE,0,6}, {DCT_ESCAPE,0,6}, {DCT_ESCAPE,0,6}, {DCT_ESCAPE,0,6},
192 {2,2,7}, {2,2,7}, {9,1,7}, {9,1,7},
193 {0,4,7}, {0,4,7}, {8,1,7}, {8,1,7},
194 {7,1,6}, {7,1,6}, {7,1,6}, {7,1,6},
195 {6,1,6}, {6,1,6}, {6,1,6}, {6,1,6},
196 {1,2,6}, {1,2,6}, {1,2,6}, {1,2,6},
197 {5,1,6}, {5,1,6}, {5,1,6}, {5,1,6},
198 {13,1,8}, {0,6,8}, {12,1,8}, {11,1,8},
199 {3,2,8}, {1,3,8}, {0,5,8}, {10,1,8},
200 {0,3,5}, {0,3,5}, {0,3,5}, {0,3,5},
201 {0,3,5}, {0,3,5}, {0,3,5}, {0,3,5},
202 {4,1,5}, {4,1,5}, {4,1,5}, {4,1,5},
203 {4,1,5}, {4,1,5}, {4,1,5}, {4,1,5},
204 {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
205 {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5}
208 /* Table B-15, DCT coefficients table one,
209 * codes 000001xx ... 11111111
211 dct_lookup_t pl_DCT_tab0a[252] =
213 {DCT_ESCAPE,0,6}, {DCT_ESCAPE,0,6}, {DCT_ESCAPE,0,6}, {DCT_ESCAPE,0,6},
215 {7,1,7}, {7,1,7}, {8,1,7}, {8,1,7},
216 {6,1,7}, {6,1,7}, {2,2,7}, {2,2,7},
217 {0,7,6}, {0,7,6}, {0,7,6}, {0,7,6},
218 {0,6,6}, {0,6,6}, {0,6,6}, {0,6,6},
219 {4,1,6}, {4,1,6}, {4,1,6}, {4,1,6},
220 {5,1,6}, {5,1,6}, {5,1,6}, {5,1,6},
221 {1,5,8}, {11,1,8}, {0,11,8}, {0,10,8},
222 {13,1,8}, {12,1,8}, {3,2,8}, {1,4,8},
223 {2,1,5}, {2,1,5}, {2,1,5}, {2,1,5},
224 {2,1,5}, {2,1,5}, {2,1,5}, {2,1,5},
225 {1,2,5}, {1,2,5}, {1,2,5}, {1,2,5},
226 {1,2,5}, {1,2,5}, {1,2,5}, {1,2,5},
227 {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
228 {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
229 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
230 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
231 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
232 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
233 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
234 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
235 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
236 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
237 {DCT_EOB,0,4}, {DCT_EOB,0,4}, {DCT_EOB,0,4}, {DCT_EOB,0,4}, /* EOB */
238 {DCT_EOB,0,4}, {DCT_EOB,0,4}, {DCT_EOB,0,4}, {DCT_EOB,0,4},
239 {DCT_EOB,0,4}, {DCT_EOB,0,4}, {DCT_EOB,0,4}, {DCT_EOB,0,4},
240 {DCT_EOB,0,4}, {DCT_EOB,0,4}, {DCT_EOB,0,4}, {DCT_EOB,0,4},
241 {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
242 {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
243 {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
244 {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
245 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
246 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
247 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
248 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
249 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
250 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
251 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
252 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
253 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
254 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
255 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
256 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
257 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
258 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
259 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
260 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
261 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
262 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
263 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
264 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
265 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
266 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
267 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
268 {0,4,5}, {0,4,5}, {0,4,5}, {0,4,5},
269 {0,4,5}, {0,4,5}, {0,4,5}, {0,4,5},
270 {0,5,5}, {0,5,5}, {0,5,5}, {0,5,5},
271 {0,5,5}, {0,5,5}, {0,5,5}, {0,5,5},
272 {9,1,7}, {9,1,7}, {1,3,7}, {1,3,7},
273 {10,1,7}, {10,1,7}, {0,8,7}, {0,8,7},
274 {0,9,7}, {0,9,7}, {0,12,8}, {0,13,8},
275 {2,3,8}, {4,2,8}, {0,14,8}, {0,15,8}
278 /* Table B-14, DCT coefficients table zero,
279 * codes 0000001000 ... 0000001111
281 dct_lookup_t pl_DCT_tab1[8] =
283 {16,1,10}, {5,2,10}, {0,7,10}, {2,3,10},
284 {1,4,10}, {15,1,10}, {14,1,10}, {4,2,10}
287 /* Table B-15, DCT coefficients table one,
288 * codes 000000100x ... 000000111x
290 dct_lookup_t pl_DCT_tab1a[8] =
292 {5,2,9}, {5,2,9}, {14,1,9}, {14,1,9},
293 {2,4,10}, {16,1,10}, {15,1,9}, {15,1,9}
296 /* Table B-14/15, DCT coefficients table zero / one,
297 * codes 000000010000 ... 000000011111
299 dct_lookup_t pl_DCT_tab2[16] =
301 {0,11,12}, {8,2,12}, {4,3,12}, {0,10,12},
302 {2,4,12}, {7,2,12}, {21,1,12}, {20,1,12},
303 {0,9,12}, {19,1,12}, {18,1,12}, {1,5,12},
304 {3,3,12}, {0,8,12}, {6,2,12}, {17,1,12}
307 /* Table B-14/15, DCT coefficients table zero / one,
308 * codes 0000000010000 ... 0000000011111
310 dct_lookup_t pl_DCT_tab3[16] =
312 {10,2,13}, {9,2,13}, {5,3,13}, {3,4,13},
313 {2,5,13}, {1,7,13}, {1,6,13}, {0,15,13},
314 {0,14,13}, {0,13,13}, {0,12,13}, {26,1,13},
315 {25,1,13}, {24,1,13}, {23,1,13}, {22,1,13}
318 /* Table B-14/15, DCT coefficients table zero / one,
319 * codes 00000000010000 ... 00000000011111
321 dct_lookup_t pl_DCT_tab4[16] =
323 {0,31,14}, {0,30,14}, {0,29,14}, {0,28,14},
324 {0,27,14}, {0,26,14}, {0,25,14}, {0,24,14},
325 {0,23,14}, {0,22,14}, {0,21,14}, {0,20,14},
326 {0,19,14}, {0,18,14}, {0,17,14}, {0,16,14}
329 /* Table B-14/15, DCT coefficients table zero / one,
330 * codes 000000000010000 ... 000000000011111
332 dct_lookup_t pl_DCT_tab5[16] =
334 {0,40,15}, {0,39,15}, {0,38,15}, {0,37,15},
335 {0,36,15}, {0,35,15}, {0,34,15}, {0,33,15},
336 {0,32,15}, {1,14,15}, {1,13,15}, {1,12,15},
337 {1,11,15}, {1,10,15}, {1,9,15}, {1,8,15}
340 /* Table B-14/15, DCT coefficients table zero / one,
341 * codes 0000000000010000 ... 0000000000011111
343 dct_lookup_t pl_DCT_tab6[16] =
345 {1,18,16}, {1,17,16}, {1,16,16}, {1,15,16},
346 {6,3,16}, {16,2,16}, {15,2,16}, {14,2,16},
347 {13,2,16}, {12,2,16}, {11,2,16}, {31,1,16},
348 {30,1,16}, {29,1,16}, {28,1,16}, {27,1,16}
351 * Initialization of lookup tables
354 /*****************************************************************************
355 * vpar_InitCrop : Initialize the crop table for saturation
356 * (ISO/IEC 13818-2 section 7.4.3)
357 *****************************************************************************/
358 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
359 void vpar_InitCrop( vpar_thread_t * p_vpar )
363 p_vpar->pi_crop = p_vpar->pi_crop_buf + 32768;
365 for( i_dummy = -32768; i_dummy < -2048; i_dummy++ )
367 p_vpar->pi_crop[i_dummy] = -2048;
369 for( ; i_dummy < 2047; i_dummy++ )
371 p_vpar->pi_crop[i_dummy] = i_dummy;
373 for( ; i_dummy < 32767; i_dummy++ )
375 p_vpar->pi_crop[i_dummy] = 2047;
380 /*****************************************************************************
381 * InitMbAddrInc : Initialize the lookup table for mb_addr_inc
382 *****************************************************************************/
384 /* Fonction for filling up the lookup table for mb_addr_inc */
385 void __inline__ FillMbAddrIncTable( vpar_thread_t * p_vpar,
386 int i_start, int i_end, int i_step,
387 int * pi_value, int i_length )
389 int i_dummy, i_dummy2;
390 for( i_dummy = i_start ; i_dummy < i_end ; i_dummy += i_step )
392 for( i_dummy2 = 0 ; i_dummy2 < i_step ; i_dummy2 ++ )
394 p_vpar->pl_mb_addr_inc[i_dummy + i_dummy2].i_value = * pi_value;
395 p_vpar->pl_mb_addr_inc[i_dummy + i_dummy2].i_length = i_length;
401 /* Fonction that initialize the table using the last one */
402 void InitMbAddrInc( vpar_thread_t * p_vpar )
406 for( i_dummy = 0 ; i_dummy < 8 ; i_dummy++ )
408 p_vpar->pl_mb_addr_inc[i_dummy].i_value = MB_ERROR;
409 p_vpar->pl_mb_addr_inc[i_dummy].i_length = 0;
412 p_vpar->pl_mb_addr_inc[8].i_value = MB_ADDRINC_ESCAPE;
413 p_vpar->pl_mb_addr_inc[8].i_length = 11;
415 for( i_dummy = 9 ; i_dummy < 15 ; i_dummy ++ )
417 p_vpar->pl_mb_addr_inc[i_dummy].i_value = MB_ERROR;
418 p_vpar->pl_mb_addr_inc[i_dummy].i_length = 0;
421 p_vpar->pl_mb_addr_inc[15].i_value = MB_ADDRINC_STUFFING;
422 p_vpar->pl_mb_addr_inc[15].i_length = 11;
424 for( i_dummy = 16; i_dummy < 24; i_dummy++ )
426 p_vpar->pl_mb_addr_inc[i_dummy].i_value = MB_ERROR;
427 p_vpar->pl_mb_addr_inc[i_dummy].i_length = 0;
430 FillMbAddrIncTable( p_vpar, 1024, 2048, 1024, &i_value, 1 );
431 FillMbAddrIncTable( p_vpar, 512, 1024, 256, &i_value, 3 );
432 FillMbAddrIncTable( p_vpar, 256, 512, 128, &i_value, 4 );
433 FillMbAddrIncTable( p_vpar, 128, 256, 64, &i_value, 5 );
434 FillMbAddrIncTable( p_vpar, 96, 128, 16, &i_value, 7 );
435 FillMbAddrIncTable( p_vpar, 48, 96, 8, &i_value, 8 );
436 FillMbAddrIncTable( p_vpar, 36, 48, 2, &i_value, 10 );
437 FillMbAddrIncTable( p_vpar, 24, 36, 1, &i_value, 11 );
440 /*****************************************************************************
441 * Init*MBType : Initialize lookup table for the Macroblock type
442 *****************************************************************************/
444 /* Fonction for filling up the tables */
445 static void __inline__ FillMBType( vpar_thread_t * p_vpar,
454 for( i_dummy = i_start ; i_dummy < i_end ; i_dummy++ )
456 p_vpar->ppl_mb_type[i_mb_type][i_dummy].i_value = i_value;
457 p_vpar->ppl_mb_type[i_mb_type][i_dummy].i_length = i_length;
461 /* Fonction that fills the table for P MB_Type */
462 void InitPMBType( vpar_thread_t * p_vpar )
464 FillMBType( p_vpar, 0, 32, 64, MB_MOTION_FORWARD|MB_PATTERN, 1 );
465 FillMBType( p_vpar, 0, 16, 32, MB_PATTERN, 2 );
466 FillMBType( p_vpar, 0, 8, 16, MB_MOTION_FORWARD, 3 );
467 FillMBType( p_vpar, 0, 6, 8, MB_INTRA, 5 );
468 FillMBType( p_vpar, 0, 4, 6, MB_QUANT|MB_MOTION_FORWARD|MB_PATTERN, 5 );
469 FillMBType( p_vpar, 0, 2, 4, MB_QUANT|MB_PATTERN, 5 );
470 p_vpar->ppl_mb_type[0][1].i_value = MB_QUANT|MB_INTRA;
471 p_vpar->ppl_mb_type[0][1].i_length = 6;
472 p_vpar->ppl_mb_type[0][0].i_value = MB_ERROR;
473 p_vpar->ppl_mb_type[0][0].i_length = 0;
476 /* Fonction that fills the table for B MB_Type */
477 void InitBMBType( vpar_thread_t * p_vpar )
479 FillMBType( p_vpar, 1, 48, 64, MB_MOTION_FORWARD
480 |MB_MOTION_BACKWARD|MB_PATTERN, 2 );
481 FillMBType( p_vpar, 1, 32, 48, MB_MOTION_FORWARD|MB_MOTION_BACKWARD, 2 );
482 FillMBType( p_vpar, 1, 24, 32, MB_MOTION_BACKWARD|MB_PATTERN, 3 );
483 FillMBType( p_vpar, 1, 16, 24, MB_MOTION_BACKWARD, 3 );
484 FillMBType( p_vpar, 1, 12, 16, MB_MOTION_FORWARD|MB_PATTERN, 4 );
485 FillMBType( p_vpar, 1, 8, 12, MB_MOTION_FORWARD, 4 );
486 FillMBType( p_vpar, 1, 6, 8, MB_INTRA, 5 );
487 FillMBType( p_vpar, 1, 4, 6, MB_QUANT|MB_MOTION_FORWARD
488 |MB_MOTION_BACKWARD|MB_PATTERN, 5 );
489 p_vpar->ppl_mb_type[1][3].i_value = MB_QUANT|MB_MOTION_FORWARD|MB_PATTERN;
490 p_vpar->ppl_mb_type[1][3].i_length = 6;
491 p_vpar->ppl_mb_type[1][2].i_value = MB_QUANT|MB_MOTION_BACKWARD|MB_PATTERN;
492 p_vpar->ppl_mb_type[1][2].i_length = 6;
493 p_vpar->ppl_mb_type[1][1].i_value = MB_QUANT|MB_INTRA;
494 p_vpar->ppl_mb_type[1][1].i_length = 6;
495 p_vpar->ppl_mb_type[1][0].i_value =MB_ERROR;
496 p_vpar->ppl_mb_type[1][0].i_length = 0;
499 /*****************************************************************************
500 * InitCodedPattern : Initialize the lookup table for decoding
501 * coded block pattern
502 *****************************************************************************/
503 void InitCodedPattern( vpar_thread_t * p_vpar )
505 p_vpar->pl_coded_pattern = pl_coded_pattern_init_table;
508 /*****************************************************************************
509 * InitDCT : Initialize tables giving the length of the dct coefficient
511 *****************************************************************************/
513 /* First fonction for filling the table */
514 static void __inline__ FillDCTTable( vpar_thread_t * p_vpar,
515 dct_lookup_t * pl_DCT_tab,
516 int i_intra, int i_dec, int i_off )
518 int i_dummy, i_dummy2;
520 i_end = sizeof(pl_DCT_tab) / sizeof(dct_lookup_t);
521 for( i_dummy = 0; i_dummy < i_end; i_dummy++ )
523 for( i_dummy2 = 0; i_dummy2 < ( 1 << i_dec ); i_dummy2++ )
525 p_vpar->pppl_dct_coef
526 [i_intra][( ( i_dummy + i_off ) << i_dec ) + i_dummy2] =
527 &pl_DCT_tab[i_dummy];
533 /* Fonction that actually fills the table or create the pointers */
534 void InitDCTTables( vpar_thread_t * p_vpar )
536 /* Tables are cut in two parts to reduce memory occupation */
538 p_vpar->pppl_dct_dc_size[0][0] = pl_dct_dc_lum_init_table_1;
539 p_vpar->pppl_dct_dc_size[0][1] = pl_dct_dc_lum_init_table_2;
540 p_vpar->pppl_dct_dc_size[1][0] = pl_dct_dc_chrom_init_table_1;
541 p_vpar->pppl_dct_dc_size[1][1] = pl_dct_dc_chrom_init_table_2;
543 /* For table B14 & B15, we have a pointer to tables */
544 /* We fill the table thanks to the fonction defined above */
546 FillDCTTable( p_vpar, pl_DCT_tab_dc, 0, 12, 4 );
547 FillDCTTable( p_vpar, pl_DCT_tab_ac, 0, 12, 4 );
548 FillDCTTable( p_vpar, pl_DCT_tab0, 0, 8, 4 );
549 FillDCTTable( p_vpar, pl_DCT_tab1, 0, 6, 8 );
550 FillDCTTable( p_vpar, pl_DCT_tab2, 0, 4, 16 );
551 FillDCTTable( p_vpar, pl_DCT_tab3, 0, 3, 16 );
552 FillDCTTable( p_vpar, pl_DCT_tab4, 0, 2, 16 );
553 FillDCTTable( p_vpar, pl_DCT_tab5, 0, 1, 16 );
554 FillDCTTable( p_vpar, pl_DCT_tab6, 0, 0, 16 );
555 FillDCTTable( p_vpar, pl_DCT_tab_dc, 1, 12, 4 );
556 FillDCTTable( p_vpar, pl_DCT_tab_ac, 1, 12, 4 );
557 FillDCTTable( p_vpar, pl_DCT_tab0a, 1, 8, 4 );
558 FillDCTTable( p_vpar, pl_DCT_tab1a, 1, 6, 8);
559 FillDCTTable( p_vpar, pl_DCT_tab2, 1, 4, 16 );
560 FillDCTTable( p_vpar, pl_DCT_tab3, 1, 3, 16 );
561 FillDCTTable( p_vpar, pl_DCT_tab4, 1, 2, 16 );
562 FillDCTTable( p_vpar, pl_DCT_tab5, 1, 1, 16 );
563 FillDCTTable( p_vpar, pl_DCT_tab6, 1, 0, 16 );
568 * Macroblock parsing functions
571 /*****************************************************************************
572 * vpar_ParseMacroblock : Parse the next macroblock
573 *****************************************************************************/
574 void vpar_ParseMacroblock( vpar_thread_t * p_vpar, int * pi_mb_address,
575 int i_mb_previous, int i_mb_base )
577 static f_addb_t ppf_addb_intra[2] = {vdec_AddBlock, vdec_CopyBlock};
578 static f_decode_block_t pppf_decode_block[2][2] =
579 { {vpar_DecodeMPEG1Non, vpar_DecodeMPEG1Intra},
580 {vpar_DecodeMPEG2Non, vpar_DecodeMPEG2Intra} };
581 static int pi_x[12] = {0,8,0,8,0,0,0,0,8,8,8,8};
582 static int pi_y[2][12] = { {0,0,8,8,0,0,8,8,0,0,8,8},
583 {0,0,1,1,0,0,1,1,0,0,1,1} };
584 static int pi_chroma_hor[4] = { 0, 1, 1, 0 };
585 static int pi_chroma_ver[4] = { 0, 1, 0, 0 };
587 int i_mb, i_b, i_mask;
593 *pi_mb_address += MacroblockAddressIncrement( p_vpar );
595 for( i_mb = i_mb_previous; i_mb < *pi_mb_address; i_mb++ )
597 /* Skipped macroblock (ISO/IEC 13818-2 7.6.6). */
598 static int pi_dc_dct_reinit[4] = {128,256,512,1024};
599 static f_motion_t pf_motion_skipped[4] = {NULL, vdec_MotionField,
600 vdec_MotionField, vdec_MotionFrame};
602 /* Reset DC predictors (7.2.1). */
603 p_vpar->slice.pi_dc_dct_pred[0] = p_vpar->slice.pi_dc_dct_pred[1]
604 = p_vpar->slice.pi_dc_dct_pred[2]
605 = pi_dc_dct_reinit[p_vpar->picture.i_intra_dc_precision];
607 if( p_vpar->picture.i_coding_type == P_CODING_TYPE )
609 /* Reset motion vector predictors (ISO/IEC 13818-2 7.6.3.4). */
610 bzero( p_vpar->slice.pppi_pmv, 8*sizeof(int) );
613 if( (p_mb = p_vpar->picture.pp_mb[i_mb_base + i_mb] =
614 vpar_NewMacroblock( &p_vpar->vfifo )) == NULL )
616 p_vpar->picture.b_error = 1;
617 intf_ErrMsg("vpar error: macroblock list is empty !");
621 InitMacroblock( p_vpar, p_mb );
623 /* No IDCT nor AddBlock. */
624 for( i_b = 0; i_b < 12; i_b++ )
626 p_mb->pf_idct[i_b] = vdec_DummyIDCT;
627 p_mb->pf_addb[i_b] = vdec_DummyBlock;
630 /* Motion type is picture structure. */
631 p_mb->pf_motion = pf_motion_skipped[p_vpar->picture.i_structure];
633 /* Set the field we use for motion compensation */
634 p_mb->ppi_field_select[0][0] = p_mb->ppi_field_select[0][1]
635 = ( p_vpar->picture.i_current_structure == BOTTOM_FIELD );
637 /* Predict from field of same parity. */
641 /* Get a macroblock structure. */
642 if( (p_mb = p_vpar->picture.pp_mb[i_mb_base + *pi_mb_address] =
643 vpar_NewMacroblock( &p_vpar->vfifo )) == NULL )
645 p_vpar->picture.b_error = 1;
646 intf_ErrMsg("vpar error: macroblock list is empty !");
650 InitMacroblock( p_vpar, p_mb );
652 /* Parse off macroblock_modes structure. */
653 MacroblockModes( p_vpar, p_mb );
655 if( p_vpar->mb.i_mb_type & MB_QUANT )
657 LoadQuantizerScale( p_vpar );
660 if( p_vpar->mb.i_mb_type & MB_MOTION_FORWARD )
662 (*p_vpar->sequence.pf_decode_mv)( p_vpar, p_mb, 0 );
665 if( p_vpar->mb.i_mb_type & MB_MOTION_BACKWARD )
667 (*p_vpar->sequence.pf_decode_mv)( p_vpar, p_mb, 1 );
670 if( p_vpar->picture.b_concealment_mv && (p_vpar->mb.i_mb_type & MB_INTRA) )
672 DumpBits( &p_vpar->bit_stream, 1 );
675 if( p_vpar->mb.i_mb_type & MB_PATTERN )
677 (*p_vpar->sequence.pf_decode_pattern)( p_vpar );
681 int pi_coded_block_pattern[2] = {0,
682 (1 << 4+2*p_vpar->sequence.i_chroma_nb_blocks) - 1};
683 p_vpar->mb.i_coded_block_pattern = pi_coded_block_pattern
684 [p_vpar->mb.i_mb_type & MB_INTRA];
687 pf_addb = ppf_addb_intra[p_vpar->mb.i_mb_type & MB_INTRA];
690 * Effectively decode blocks.
693 i_mask = 1 << (3 + 2*p_vpar->sequence.i_chroma_nb_blocks);
696 p_data1 = (elem_t*) p_mb->p_picture->p_y;
697 // + p_mb->i_l_x + p_mb->i_l_y*(p_vpar->sequence.i_width);
699 for( i_b = 0 ; i_b < 4 ; i_b++, i_mask >>= 1 )
701 if( p_vpar->mb.i_coded_block_pattern & i_mask )
703 memset( p_mb->ppi_blocks[i_b], 0, 64*sizeof(elem_t) );
704 (*pppf_decode_block[p_vpar->sequence.b_mpeg2]
705 [p_vpar->mb.i_mb_type & MB_INTRA])
706 ( p_vpar, p_mb, i_b );
708 /* decode_block has already set pf_idct and pi_sparse_pos. */
709 p_mb->pf_addb[i_b] = pf_addb;
711 /* Calculate block coordinates. */
712 p_mb->p_data[i_b] = p_data1
713 + pi_y[p_vpar->mb.b_dct_type][i_b]
714 * p_vpar->sequence.i_chroma_width;
718 /* Block not coded, so no IDCT, nor AddBlock */
719 p_mb->pf_addb[i_b] = vdec_DummyBlock;
720 p_mb->pf_idct[i_b] = vdec_DummyIDCT;
725 p_data1 = (elem_t*) p_mb->p_picture->p_u
726 + (p_mb->i_c_x >> pi_chroma_hor[p_vpar->sequence.i_chroma_format])
727 + (p_mb->i_c_y >> pi_chroma_ver[p_vpar->sequence.i_chroma_format])
728 * (p_vpar->sequence.i_chroma_width);
729 p_data2 = (elem_t*) p_mb->p_picture->p_v
730 + (p_mb->i_c_x >> pi_chroma_hor[p_vpar->sequence.i_chroma_format])
731 + (p_mb->i_c_y >> pi_chroma_ver[p_vpar->sequence.i_chroma_format])
732 * (p_vpar->sequence.i_chroma_width);
734 for( i_b = 4; i_b < 4 + 2*p_vpar->sequence.i_chroma_nb_blocks;
735 i_b++, i_mask >>= 1 )
737 elem_t * pp_data[2] = {p_data1, p_data2};
739 if( p_vpar->mb.i_coded_block_pattern & i_mask )
741 memset( p_mb->ppi_blocks[i_b], 0, 64*sizeof(elem_t) );
742 (*pppf_decode_block[p_vpar->sequence.b_mpeg2]
743 [p_vpar->mb.i_mb_type & MB_INTRA])
744 ( p_vpar, p_mb, i_b );
746 /* decode_block has already set pf_idct and pi_sparse_pos. */
747 p_mb->pf_addb[i_b] = pf_addb;
749 /* Calculate block coordinates. */
750 p_mb->p_data[i_b] = pp_data[i_b & 1]
751 + pi_y[p_vpar->mb.b_dct_type][i_b]
752 * p_vpar->sequence.i_chroma_width;
756 /* Block not coded, so no IDCT, nor AddBlock */
757 p_mb->pf_addb[i_b] = vdec_DummyBlock;
758 p_mb->pf_idct[i_b] = vdec_DummyIDCT;
762 if( !( p_vpar->mb.i_mb_type & MB_INTRA ) )
764 static int pi_dc_dct_reinit[4] = {128,256,512,1024};
766 /* Reset DC predictors (7.2.1). */
767 p_vpar->slice.pi_dc_dct_pred[0] = p_vpar->slice.pi_dc_dct_pred[1]
768 = p_vpar->slice.pi_dc_dct_pred[2]
769 = pi_dc_dct_reinit[p_vpar->picture.i_intra_dc_precision];
771 else if( !p_vpar->picture.b_concealment_mv )
773 /* Reset MV predictors. */
774 bzero( p_vpar->slice.pppi_pmv, 8*sizeof(int) );
778 /*****************************************************************************
779 * InitMacroblock : Initialize macroblock values
780 *****************************************************************************/
781 static __inline__ void InitMacroblock( vpar_thread_t * p_vpar,
782 macroblock_t * p_mb )
784 static f_chroma_motion_t pf_chroma_motion[4] =
785 { NULL, vdec_Motion420, vdec_Motion422, vdec_Motion444 };
787 p_mb->p_picture = p_vpar->picture.p_picture;
788 p_mb->i_structure = p_vpar->picture.i_structure;
789 p_mb->i_current_structure = p_vpar->picture.i_current_structure;
790 p_mb->i_l_x = p_vpar->mb.i_l_x;
791 p_mb->i_l_y = p_vpar->mb.i_l_y;
792 p_mb->i_c_x = p_vpar->mb.i_c_x;
793 p_mb->i_c_y = p_vpar->mb.i_c_y;
794 p_mb->i_chroma_nb_blocks = p_vpar->sequence.i_chroma_nb_blocks;
795 p_mb->pf_chroma_motion = pf_chroma_motion[p_vpar->sequence.i_chroma_format];
796 p_mb->b_P_coding_type = ( p_vpar->picture.i_coding_type == P_CODING_TYPE );
798 p_mb->p_forward = p_vpar->sequence.p_forward;
799 p_mb->p_backward = p_vpar->sequence.p_backward;
801 p_mb->i_addb_l_stride = p_mb->i_l_stride = p_vpar->picture.i_l_stride;
802 p_mb->i_addb_c_stride = p_mb->i_c_stride = p_vpar->picture.i_c_stride;
804 /* Update macroblock real position. */
805 p_vpar->mb.i_l_x += 16;
806 p_vpar->mb.i_l_y += (p_vpar->mb.i_l_x / p_vpar->sequence.i_width)
807 * (2 - p_vpar->picture.b_frame_structure) * 16;
808 p_vpar->mb.i_l_x %= p_vpar->sequence.i_width;
810 p_vpar->mb.i_c_x += p_vpar->sequence.i_chroma_mb_width;
811 p_vpar->mb.i_c_y += (p_vpar->mb.i_c_x / p_vpar->sequence.i_chroma_width)
812 * (2 - p_vpar->picture.b_frame_structure)
813 * p_vpar->sequence.i_chroma_mb_height;
814 p_vpar->mb.i_c_x %= p_vpar->sequence.i_chroma_width;
817 /*****************************************************************************
818 * MacroblockAddressIncrement : Get the macroblock_address_increment field
819 *****************************************************************************/
820 static __inline__ int MacroblockAddressIncrement( vpar_thread_t * p_vpar )
822 /* Index in the lookup table mb_addr_inc */
823 int i_index = ShowBits( &p_vpar->bit_stream, 11 );
825 p_vpar->mb.i_addr_inc = 0;
827 /* Test the presence of the escape character */
828 while( i_index == 8 )
830 DumpBits( &p_vpar->bit_stream, 11 );
831 p_vpar->mb.i_addr_inc += 33;
832 i_index = ShowBits( &p_vpar->bit_stream, 11 );
835 /* Affect the value from the lookup table */
836 p_vpar->mb.i_addr_inc += p_vpar->pl_mb_addr_inc[i_index].i_value;
838 /* Dump the good number of bits */
839 DumpBits( &p_vpar->bit_stream, p_vpar->pl_mb_addr_inc[i_index].i_length );
842 /*****************************************************************************
843 * MacroblockModes : Get the macroblock_modes structure
844 *****************************************************************************/
845 static __inline__ void MacroblockModes( vpar_thread_t * p_vpar,
846 macroblock_t * p_mb )
848 static f_motion_t pf_motion[2][4] =
849 { {NULL, vdec_FieldFieldRecon, vdec_Field16x8Recon, vdec_FieldDMVRecon},
850 {NULL, vdec_FrameFieldRecon, vdec_FrameFrameRecon, vdec_FrameDMVRecon} };
851 static int ppi_mv_count[2][4] = { {0, 1, 2, 1}, {0, 2, 1, 1} };
852 static int ppi_mv_format[2][4] = { {0, 1, 1, 1}, {0, 1, 2, 1} };
854 /* Get macroblock_type. */
855 p_vpar->mb.i_mb_type = (p_vpar->picture.pf_macroblock_type)( p_vpar );
856 p_mb->i_mb_type = p_vpar->mb.i_mb_type;
858 /* SCALABILITY : warning, we don't know if spatial_temporal_weight_code
859 * has to be dropped, take care if you use scalable streams. */
860 /* DumpBits( &p_vpar->bit_stream, 2 ); */
862 if( p_mb->b_P_coding_type && !(p_vpar->mb.i_mb_type & (MB_MOTION_FORWARD|MB_INTRA)) )
864 /* Special No-MC macroblock in P pictures (7.6.3.5). */
865 memset( p_vpar->slice.pppi_pmv, 0, 8*sizeof(int) );
866 memset( p_mb->pppi_motion_vectors, 0, 8*sizeof(int) );
868 p_vpar->mb.i_motion_type = MOTION_FRAME;
869 p_mb->ppi_field_select[0][0] = ( p_vpar->picture.i_current_structure == BOTTOM_FIELD );
871 else if( !(p_vpar->mb.i_mb_type & (MB_MOTION_FORWARD | MB_MOTION_BACKWARD))
872 || p_vpar->picture.b_frame_pred_frame_dct )
874 /* If mb_type has neither MOTION_FORWARD nor MOTION_BACKWARD, this
875 * is useless, but also harmless. */
876 p_vpar->mb.i_motion_type = MOTION_FRAME;
880 p_vpar->mb.i_motion_type = GetBits( &p_vpar->bit_stream, 2 );
883 if( p_vpar->mb.i_mb_type & MB_INTRA )
885 /* For the intra macroblocks, we use an empty motion
886 * compensation function */
887 p_mb->pf_motion = vdec_DummyRecon;
891 p_mb->pf_motion = pf_motion[p_vpar->picture.b_frame_structure]
892 [p_vpar->mb.i_motion_type];
894 p_vpar->mb.i_mv_count = ppi_mv_count[p_vpar->picture.b_frame_structure]
895 [p_vpar->mb.i_motion_type];
896 p_vpar->mb.i_mv_format = ppi_mv_format[p_vpar->picture.b_frame_structure]
897 [p_vpar->mb.i_motion_type];
899 p_vpar->mb.b_dct_type = 0;
900 if( (p_vpar->picture.i_structure == FRAME_STRUCTURE) &&
901 (!p_vpar->picture.b_frame_pred_frame_dct) &&
902 (p_vpar->mb.i_mb_type & (MB_PATTERN|MB_INTRA)) )
904 if( p_vpar->mb.b_dct_type = GetBits( &p_vpar->bit_stream, 1 ) )
906 /* The DCT is coded on fields. Jump one line between each
908 p_mb->i_addb_l_stride <<= 1;
909 p_mb->i_addb_l_stride += 8;
910 /* With CHROMA_420, the DCT is necessarily frame-coded. */
911 if( p_vpar->sequence.i_chroma_format != CHROMA_420 )
913 p_mb->i_addb_c_stride <<= 1;
914 p_mb->i_addb_c_stride += 8;
919 p_vpar->mb.b_dmv = p_vpar->mb.i_motion_type == MOTION_DMV;
922 /*****************************************************************************
923 * vpar_IMBType : macroblock_type in I pictures
924 *****************************************************************************/
925 int vpar_IMBType( vpar_thread_t * p_vpar )
927 /* Take two bits for testing */
928 int i_type = ShowBits( &p_vpar->bit_stream, 2 );
930 /* Lookup table for macroblock_type */
931 static lookup_t pl_mb_Itype[4] = { {MB_ERROR, 0},
932 {MB_QUANT|MB_INTRA, 2},
936 /* Dump the good number of bits */
937 DumpBits( &p_vpar->bit_stream, pl_mb_Itype[i_type].i_length );
938 return pl_mb_Itype[i_type].i_value;
941 /*****************************************************************************
942 * vpar_PMBType : macroblock_type in P pictures
943 *****************************************************************************/
944 int vpar_PMBType( vpar_thread_t * p_vpar )
946 /* Testing on 6 bits */
947 int i_type = ShowBits( &p_vpar->bit_stream, 6 );
949 /* Dump the good number of bits */
950 DumpBits( &p_vpar->bit_stream, p_vpar->ppl_mb_type[0][i_type].i_length );
952 /* return the value from the lookup table for P type */
953 return p_vpar->ppl_mb_type[0][i_type].i_value;
956 /*****************************************************************************
957 * vpar_BMBType : macroblock_type in B pictures
958 *****************************************************************************/
959 int vpar_BMBType( vpar_thread_t * p_vpar )
961 /* Testing on 6 bits */
962 int i_type = ShowBits( &p_vpar->bit_stream, 6 );
964 /* Dump the good number of bits */
965 DumpBits( &p_vpar->bit_stream, p_vpar->ppl_mb_type[1][i_type].i_length );
967 /* return the value from the lookup table for B type */
968 return p_vpar->ppl_mb_type[1][i_type].i_value;
971 /*****************************************************************************
972 * vpar_DMBType : macroblock_type in D pictures
973 *****************************************************************************/
974 int vpar_DMBType( vpar_thread_t * p_vpar )
977 int i_type = GetBits( &p_vpar->bit_stream, 1 );
980 static int pi_mb_Dtype[2] = { MB_ERROR, 1 };
982 return pi_mb_Dtype[i_type];
985 /*****************************************************************************
986 * vpar_CodedPattern420 : coded_block_pattern with 420 chroma
987 *****************************************************************************/
988 int vpar_CodedPattern420( vpar_thread_t * p_vpar )
990 /* Take the max 9 bits length vlc code for testing */
991 int i_vlc = ShowBits( &p_vpar->bit_stream, 9 );
993 /* Trash the good number of bits read in the lookup table */
994 DumpBits( &p_vpar->bit_stream, p_vpar->pl_coded_pattern[i_vlc].i_length );
996 /* return the value from the vlc table */
997 return p_vpar->pl_coded_pattern[i_vlc].i_value;
1000 /*****************************************************************************
1001 * vpar_CodedPattern422 : coded_block_pattern with 422 chroma
1002 *****************************************************************************/
1003 int vpar_CodedPattern422( vpar_thread_t * p_vpar )
1005 int i_vlc = ShowBits( &p_vpar->bit_stream, 9 );
1007 /* Supplementary 2 bits long code for 422 format */
1008 int i_coded_block_pattern_1;
1010 DumpBits( &p_vpar->bit_stream, p_vpar->pl_coded_pattern[i_vlc].i_length );
1011 i_coded_block_pattern_1 = GetBits( &p_vpar->bit_stream, 2 );
1013 /* the code is just to be added to the value found in the table */
1014 return p_vpar->pl_coded_pattern[i_vlc].i_value |
1015 (i_coded_block_pattern_1 << 6);
1018 /*****************************************************************************
1019 * vpar_CodedPattern444 : coded_block_pattern with 444 chroma
1020 *****************************************************************************/
1021 int vpar_CodedPattern444( vpar_thread_t * p_vpar )
1023 int i_vlc = ShowBits( &p_vpar->bit_stream, 9 );
1024 int i_coded_block_pattern_2;
1026 DumpBits( &p_vpar->bit_stream, p_vpar->pl_coded_pattern[i_vlc].i_length );
1027 i_coded_block_pattern_2 = GetBits( &p_vpar->bit_stream, 6 );
1029 return p_vpar->pl_coded_pattern[i_vlc].i_value |
1030 ( i_coded_block_pattern_2 << 6 );
1033 /*****************************************************************************
1034 * vpar_DecodeMPEG1Non : decode MPEG-1 non-intra blocks
1035 *****************************************************************************/
1036 static void vpar_DecodeMPEG1Non( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b )
1039 if( p_vpar->picture.i_coding_type == D_CODING_TYPE )
1041 /* Remove end_of_macroblock (always 1, prevents startcode emulation)
1042 * ISO/IEC 11172-2 section 2.4.2.7 and 2.4.3.6 */
1043 DumpBits( &p_vpar->bit_stream, 1 );
1047 /*****************************************************************************
1048 * vpar_DecodeMPEG1Intra : decode MPEG-1 intra blocks
1049 *****************************************************************************/
1050 static void vpar_DecodeMPEG1Intra( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b )
1053 if( p_vpar->picture.i_coding_type == D_CODING_TYPE )
1055 /* Remove end_of_macroblock (always 1, prevents startcode emulation)
1056 * ISO/IEC 11172-2 section 2.4.2.7 and 2.4.3.6 */
1057 DumpBits( &p_vpar->bit_stream, 1 );
1061 /*****************************************************************************
1062 * vpar_DecodeMPEG2Non : decode MPEG-2 non-intra blocks
1063 *****************************************************************************/
1064 static void vpar_DecodeMPEG2Non( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b )
1077 /* Lookup table for the offset in the tables for ac coef decoding */
1078 static lookup_t pl_offset_table[8] = { { 12, 4 }, { 8, 4 }, { 6, 8 },
1079 { 4, 16 }, { 3, 16 }, { 2, 16 },
1080 { 1, 16 }, { 0, 16 } };
1081 /* There is no special decodding for DC coefficient in non intra blocs
1082 * except that we won't use exactly the same table B.14 note 3 & 4 */
1083 /* Decoding of the coefficients */
1091 b_intra = p_vpar->picture.b_intra_vlc_format;
1092 for( i_dummy = 1; i_dummy < 64; i_dummy++ )
1094 i_code = ShowBits( &p_vpar->bit_stream, 16 );
1095 i_run = (*p_vpar->pppl_dct_coef[b_intra][i_code]).i_run;
1096 DumpBits( &p_vpar->bit_stream,
1097 (*p_vpar->pppl_dct_coef[b_intra][i_code]).i_length );
1101 i_run = GetBits( &p_vpar->bit_stream, 6 );
1102 i_level = GetBits( &p_vpar->bit_stream, 12 );
1103 p_mb->ppi_blocks[i_b][i_dummy] = ( b_sign = ( i_level > 2047 ) )
1104 ? ( -4096 + i_level )
1114 i_level = (*p_vpar->pppl_dct_coef[b_intra][i_code]).i_level;
1115 b_sign = GetBits( &p_vpar->bit_stream, 1 );
1116 p_mb->ppi_blocks[i_b][i_dummy] = b_sign ? -i_level : i_level;
1124 p_mb->pf_idct[i_b] = vdec_SparseIDCT;
1125 p_mb->pi_sparse_pos[i_b] = i_coef;
1129 p_mb->pf_idct[i_b] = vdec_IDCT;
1133 /*****************************************************************************
1134 * vpar_DecodeMPEG2Intra : decode MPEG-2 intra blocks
1135 *****************************************************************************/
1136 static void vpar_DecodeMPEG2Intra( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b )
1155 /* Lookup Table for the chromatic component */
1156 static int pi_cc_index[12] = { 0, 0, 0, 0, 1, 2, 1, 2, 1, 2 };
1158 /* Lookup table for the offset in the tables for ac coef decoding */
1159 static lookup_t pl_offset_table[8] = { { 12, 4 }, { 8, 4 }, { 6, 8 },
1160 { 4, 16 }, { 3, 16 }, { 2, 16 },
1161 { 1, 16 }, { 0, 16 } };
1162 i_cc = pi_cc_index[i_b];
1164 /* Determine whether it is luminance or not (chrominance) */
1165 i_type = ( i_cc + 1 ) >> 1;
1167 /* Decoding of the DC intra coefficient */
1168 /* The nb of bits to parse depends on i_type */
1169 i_code = ShowBits( &p_vpar->bit_stream, 9 + i_type );
1171 /* To reduce memory occupation, there are two lookup tables
1172 * See InitDCT above */
1173 i_code5 = i_code >> 4;
1175 /* Shall we lookup in the first or in the second table ? */
1176 i_select = ( i_code5 - 1 ) / 31;
1177 /* Offset value for looking in the second table */
1178 i_offset = 0x1f0 + ( i_type * 0x1f0 );
1179 i_pos = ( i_code5 * ( ! i_select ) ) + ( ( i_code - i_offset ) * i_select );
1180 i_dct_dc_size = p_vpar->pppl_dct_dc_size[i_type][i_select][i_pos].i_value;
1182 /* Dump the variable length code */
1183 DumpBits( &p_vpar->bit_stream,
1184 p_vpar->pppl_dct_dc_size[i_type][i_select][i_pos].i_length );
1186 /* Read the actual code with the good length */
1187 i_dct_dc_diff = GetBits( &p_vpar->bit_stream, i_dct_dc_size );
1188 p_vpar->slice.pi_dc_dct_pred[i_cc] += i_dct_dc_diff;
1191 p_mb->ppi_blocks[i_b][0] = ( p_vpar->slice.pi_dc_dct_pred[i_cc] <<
1192 ( 3 - p_vpar->picture.i_intra_dc_precision ) );
1195 p_mb->ppi_blocks[i_b][0] = ( p_vpar->slice.pi_dc_dct_pred[i_cc] <<
1196 ( 11 - p_vpar->picture.i_intra_dc_precision ) );
1197 i_nc = ( p_vpar->slice.pi_dc_dct_pred[i_cc] != 0 );
1200 /* Decoding of the AC coefficients */
1203 b_intra = p_vpar->picture.b_intra_vlc_format;
1204 for( i_dummy = 1; i_dummy < 64; i_dummy++ )
1206 i_code = ShowBits( &p_vpar->bit_stream, 16 );
1207 i_run = (*p_vpar->pppl_dct_coef[b_intra][i_code]).i_run;
1208 DumpBits( &p_vpar->bit_stream,
1209 (*p_vpar->pppl_dct_coef[b_intra][i_code]).i_length );
1213 i_run = GetBits( &p_vpar->bit_stream, 6 );
1214 i_level = GetBits( &p_vpar->bit_stream, 12 );
1215 p_mb->ppi_blocks[i_b][i_dummy] = ( b_sign = ( i_level > 2047 ) )
1216 ? ( -4096 + i_level )
1226 i_level = (*p_vpar->pppl_dct_coef[b_intra][i_code]).i_level;
1227 b_sign = GetBits( &p_vpar->bit_stream, 1 );
1228 p_mb->ppi_blocks[i_b][i_dummy] = b_sign ? -i_level : i_level;
1236 p_mb->pf_idct[i_b] = vdec_SparseIDCT;
1237 p_mb->pi_sparse_pos[i_b] = i_coef;
1241 p_mb->pf_idct[i_b] = vdec_IDCT;