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 )
391 for( i_dummy2 = 0 ; i_dummy2 < i_step ; i_dummy2 ++ )
393 p_vpar->pl_mb_addr_inc[i_dummy + i_dummy2].i_value = * pi_value;
394 p_vpar->pl_mb_addr_inc[i_dummy + i_dummy2].i_length = i_length;
399 /* Fonction that initialize the table using the last one */
400 void InitMbAddrInc( vpar_thread_t * p_vpar )
404 for( i_dummy = 0 ; i_dummy < 8 ; i_dummy++ )
406 p_vpar->pl_mb_addr_inc[i_dummy].i_value = MB_ERROR;
407 p_vpar->pl_mb_addr_inc[i_dummy].i_length = 0;
410 p_vpar->pl_mb_addr_inc[8].i_value = MB_ADDRINC_ESCAPE;
411 p_vpar->pl_mb_addr_inc[8].i_length = 11;
413 for( i_dummy = 9 ; i_dummy < 15 ; i_dummy ++ )
415 p_vpar->pl_mb_addr_inc[i_dummy].i_value = MB_ERROR;
416 p_vpar->pl_mb_addr_inc[i_dummy].i_length = 0;
419 p_vpar->pl_mb_addr_inc[15].i_value = MB_ADDRINC_STUFFING;
420 p_vpar->pl_mb_addr_inc[15].i_length = 11;
422 for( i_dummy = 16; i_dummy < 24; i_dummy++ )
424 p_vpar->pl_mb_addr_inc[i_dummy].i_value = MB_ERROR;
425 p_vpar->pl_mb_addr_inc[i_dummy].i_length = 0;
427 pi_value = (int *) malloc( sizeof( int ) );
429 FillMbAddrIncTable( p_vpar, 1024, 2048, 1024, pi_value, 1 );
430 FillMbAddrIncTable( p_vpar, 512, 1024, 256, pi_value, 3 );
431 FillMbAddrIncTable( p_vpar, 256, 512, 128, pi_value, 4 );
432 FillMbAddrIncTable( p_vpar, 128, 256, 64, pi_value, 5 );
433 FillMbAddrIncTable( p_vpar, 96, 128, 16, pi_value, 7 );
434 FillMbAddrIncTable( p_vpar, 48, 96, 8, pi_value, 8 );
435 FillMbAddrIncTable( p_vpar, 36, 48, 2, pi_value, 10 );
436 FillMbAddrIncTable( p_vpar, 24, 36, 1, pi_value, 11 );
439 /*****************************************************************************
440 * Init*MBType : Initialize lookup table for the Macroblock type
441 *****************************************************************************/
443 /* Fonction for filling up the tables */
444 static void __inline__ FillMBType( vpar_thread_t * p_vpar,
453 for( i_dummy = i_start ; i_dummy < i_end ; i_dummy++ )
455 p_vpar->ppl_mb_type[i_mb_type][i_dummy].i_value = i_value;
456 p_vpar->ppl_mb_type[i_mb_type][i_dummy].i_length = i_length;
460 /* Fonction that fills the table for P MB_Type */
461 void InitPMBType( vpar_thread_t * p_vpar )
463 FillMBType( p_vpar, 0, 32, 64, MB_MOTION_FORWARD|MB_PATTERN, 1 );
464 FillMBType( p_vpar, 0, 16, 32, MB_PATTERN, 2 );
465 FillMBType( p_vpar, 0, 8, 16, MB_MOTION_FORWARD, 3 );
466 FillMBType( p_vpar, 0, 6, 8, MB_INTRA, 5 );
467 FillMBType( p_vpar, 0, 4, 6, MB_QUANT|MB_MOTION_FORWARD|MB_PATTERN, 5 );
468 FillMBType( p_vpar, 0, 2, 4, MB_QUANT|MB_PATTERN, 5 );
469 p_vpar->ppl_mb_type[0][1].i_value = MB_QUANT|MB_INTRA;
470 p_vpar->ppl_mb_type[0][1].i_length = 6;
471 p_vpar->ppl_mb_type[0][0].i_value = MB_ERROR;
472 p_vpar->ppl_mb_type[0][0].i_length = 0;
475 /* Fonction that fills the table for B MB_Type */
476 void InitBMBType( vpar_thread_t * p_vpar )
478 FillMBType( p_vpar, 1, 48, 64, MB_MOTION_FORWARD
479 |MB_MOTION_BACKWARD|MB_PATTERN, 2 );
480 FillMBType( p_vpar, 1, 32, 48, MB_MOTION_FORWARD|MB_MOTION_BACKWARD, 2 );
481 FillMBType( p_vpar, 1, 24, 32, MB_MOTION_BACKWARD|MB_PATTERN, 3 );
482 FillMBType( p_vpar, 1, 16, 24, MB_MOTION_BACKWARD, 3 );
483 FillMBType( p_vpar, 1, 12, 16, MB_MOTION_FORWARD|MB_PATTERN, 4 );
484 FillMBType( p_vpar, 1, 8, 12, MB_MOTION_FORWARD, 4 );
485 FillMBType( p_vpar, 1, 6, 8, MB_INTRA, 5 );
486 FillMBType( p_vpar, 1, 4, 6, MB_QUANT|MB_MOTION_FORWARD
487 |MB_MOTION_BACKWARD|MB_PATTERN, 5 );
488 p_vpar->ppl_mb_type[1][3].i_value = MB_QUANT|MB_MOTION_FORWARD|MB_PATTERN;
489 p_vpar->ppl_mb_type[1][3].i_length = 6;
490 p_vpar->ppl_mb_type[1][2].i_value = MB_QUANT|MB_MOTION_BACKWARD|MB_PATTERN;
491 p_vpar->ppl_mb_type[1][2].i_length = 6;
492 p_vpar->ppl_mb_type[1][1].i_value = MB_QUANT|MB_INTRA;
493 p_vpar->ppl_mb_type[1][1].i_length = 6;
494 p_vpar->ppl_mb_type[1][0].i_value =MB_ERROR;
495 p_vpar->ppl_mb_type[1][0].i_length = 0;
498 /*****************************************************************************
499 * InitCodedPattern : Initialize the lookup table for decoding
500 * coded block pattern
501 *****************************************************************************/
502 void InitCodedPattern( vpar_thread_t * p_vpar )
504 memcpy( p_vpar->pl_coded_pattern, pl_coded_pattern_init_table ,
505 sizeof(pl_coded_pattern_init_table) );
508 /*****************************************************************************
509 * InitDCT : Initialize tables giving the length of the dct coefficient
511 *****************************************************************************/
513 void InitDCTTables( vpar_thread_t * p_vpar )
515 /* Tables are cut in two parts to reduce memory occupation */
516 memcpy( p_vpar->pppl_dct_dc_size[0][0], pl_dct_dc_lum_init_table_1,
517 sizeof( pl_dct_dc_lum_init_table_1 ) );
518 memcpy( p_vpar->pppl_dct_dc_size[0][1], pl_dct_dc_lum_init_table_2,
519 sizeof( pl_dct_dc_lum_init_table_2 ) );
520 memcpy( p_vpar->pppl_dct_dc_size[1][0], pl_dct_dc_chrom_init_table_1,
521 sizeof( pl_dct_dc_chrom_init_table_1 ) );
522 memcpy( p_vpar->pppl_dct_dc_size[1][1], pl_dct_dc_chrom_init_table_2,
523 sizeof( pl_dct_dc_chrom_init_table_2 ) );
524 /* For table B14 & B15, we have a pointer to tables */
525 memcpy( p_vpar->ppl_dct_coef[0], pl_DCT_tab_dc, sizeof( pl_DCT_tab_dc ) );
526 memcpy( p_vpar->ppl_dct_coef[1], pl_DCT_tab_ac, sizeof( pl_DCT_tab_ac ) );
527 memcpy( p_vpar->ppl_dct_coef[2], pl_DCT_tab0, sizeof( pl_DCT_tab0 ) );
528 memcpy( p_vpar->ppl_dct_coef[3], pl_DCT_tab1, sizeof( pl_DCT_tab1 ) );
529 memcpy( p_vpar->ppl_dct_coef[4], pl_DCT_tab2, sizeof( pl_DCT_tab2 ) );
530 memcpy( p_vpar->ppl_dct_coef[5], pl_DCT_tab3, sizeof( pl_DCT_tab3 ) );
531 memcpy( p_vpar->ppl_dct_coef[6], pl_DCT_tab4, sizeof( pl_DCT_tab4 ) );
532 memcpy( p_vpar->ppl_dct_coef[7], pl_DCT_tab5, sizeof( pl_DCT_tab5 ) );
533 memcpy( p_vpar->ppl_dct_coef[8], pl_DCT_tab6, sizeof( pl_DCT_tab6 ) );
534 memcpy( p_vpar->ppl_dct_coef[9], pl_DCT_tab0a, sizeof( pl_DCT_tab0a ) );
535 memcpy( p_vpar->ppl_dct_coef[10], pl_DCT_tab1a, sizeof( pl_DCT_tab1a ) );
539 * Macroblock parsing functions
542 /*****************************************************************************
543 * vpar_ParseMacroblock : Parse the next macroblock
544 *****************************************************************************/
545 void vpar_ParseMacroblock( vpar_thread_t * p_vpar, int * pi_mb_address,
546 int i_mb_previous, int i_mb_base )
548 static f_addb_t ppf_addb_intra[2] = {vdec_AddBlock, vdec_CopyBlock};
549 static f_decode_block_t pppf_decode_block[2][2] =
550 { {vpar_DecodeMPEG1Non, vpar_DecodeMPEG1Intra},
551 {vpar_DecodeMPEG2Non, vpar_DecodeMPEG2Intra} };
552 static int pi_x[12] = {0,8,0,8,0,0,0,0,8,8,8,8};
553 static int pi_y[2][12] = { {0,0,8,8,0,0,8,8,0,0,8,8},
554 {0,0,1,1,0,0,1,1,0,0,1,1} };
555 static int pi_chroma_hor[4] = { 0, 1, 1, 0 };
556 static int pi_chroma_ver[4] = { 0, 1, 0, 0 };
558 int i_mb, i_b, i_mask;
564 *pi_mb_address += MacroblockAddressIncrement( p_vpar );
566 for( i_mb = i_mb_previous; i_mb < *pi_mb_address; i_mb++ )
568 /* Skipped macroblock (ISO/IEC 13818-2 7.6.6). */
569 static int pi_dc_dct_reinit[4] = {128,256,512,1024};
570 static f_motion_t pf_motion_skipped[4] = {NULL, vdec_MotionField,
571 vdec_MotionField, vdec_MotionFrame};
573 /* Reset DC predictors (7.2.1). */
574 p_vpar->slice.pi_dc_dct_pred[0] = p_vpar->slice.pi_dc_dct_pred[1]
575 = p_vpar->slice.pi_dc_dct_pred[2]
576 = pi_dc_dct_reinit[p_vpar->picture.i_intra_dc_precision];
578 if( p_vpar->picture.i_coding_type == P_CODING_TYPE )
580 /* Reset motion vector predictors (ISO/IEC 13818-2 7.6.3.4). */
581 bzero( p_vpar->slice.pppi_pmv, 8*sizeof(int) );
584 if( (p_mb = p_vpar->picture.pp_mb[i_mb_base + i_mb] =
585 vpar_NewMacroblock( &p_vpar->vfifo )) == NULL )
587 p_vpar->picture.b_error = 1;
588 intf_ErrMsg("vpar error: macroblock list is empty !");
592 InitMacroblock( p_vpar, p_mb );
594 /* No IDCT nor AddBlock. */
595 for( i_b = 0; i_b < 12; i_b++ )
597 p_mb->pf_idct[i_b] = vdec_DummyIDCT;
598 p_mb->pf_addb[i_b] = vdec_DummyBlock;
601 /* Motion type is picture structure. */
602 p_mb->pf_motion = pf_motion_skipped[p_vpar->picture.i_structure];
604 /* Set the field we use for motion compensation */
605 p_mb->ppi_field_select[0][0] = p_mb->ppi_field_select[0][1]
606 = ( p_vpar->picture.i_current_structure == BOTTOM_FIELD );
608 /* Predict from field of same parity. */
612 /* Get a macroblock structure. */
613 if( (p_mb = p_vpar->picture.pp_mb[i_mb_base + *pi_mb_address] =
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 /* Parse off macroblock_modes structure. */
624 MacroblockModes( p_vpar, p_mb );
626 if( p_vpar->mb.i_mb_type & MB_QUANT )
628 LoadQuantizerScale( p_vpar );
631 if( p_vpar->mb.i_mb_type & MB_MOTION_FORWARD )
633 (*p_vpar->sequence.pf_decode_mv)( p_vpar, p_mb, 0 );
636 if( p_vpar->mb.i_mb_type & MB_MOTION_BACKWARD )
638 (*p_vpar->sequence.pf_decode_mv)( p_vpar, p_mb, 1 );
641 if( p_vpar->picture.b_concealment_mv && (p_vpar->mb.i_mb_type & MB_INTRA) )
643 DumpBits( &p_vpar->bit_stream, 1 );
646 if( p_vpar->mb.i_mb_type & MB_PATTERN )
648 (*p_vpar->sequence.pf_decode_pattern)( p_vpar );
652 int pi_coded_block_pattern[2] = {0,
653 (1 << 4+2*p_vpar->sequence.i_chroma_nb_blocks) - 1};
654 p_vpar->mb.i_coded_block_pattern = pi_coded_block_pattern
655 [p_vpar->mb.i_mb_type & MB_INTRA];
658 pf_addb = ppf_addb_intra[p_vpar->mb.i_mb_type & MB_INTRA];
661 * Effectively decode blocks.
664 i_mask = 1 << (3 + 2*p_vpar->sequence.i_chroma_nb_blocks);
667 p_data1 = (elem_t*) p_mb->p_picture->p_y;
668 // + p_mb->i_l_x + p_mb->i_l_y*(p_vpar->sequence.i_width);
670 for( i_b = 0 ; i_b < 4 ; i_b++, i_mask >>= 1 )
672 if( p_vpar->mb.i_coded_block_pattern & i_mask )
674 memset( p_mb->ppi_blocks[i_b], 0, 64*sizeof(elem_t) );
675 (*pppf_decode_block[p_vpar->sequence.b_mpeg2]
676 [p_vpar->mb.i_mb_type & MB_INTRA])
677 ( p_vpar, p_mb, i_b );
679 /* decode_block has already set pf_idct and pi_sparse_pos. */
680 p_mb->pf_addb[i_b] = pf_addb;
682 /* Calculate block coordinates. */
683 p_mb->p_data[i_b] = p_data1
684 + pi_y[p_vpar->mb.b_dct_type][i_b]
685 * p_vpar->sequence.i_chroma_width;
689 /* Block not coded, so no IDCT, nor AddBlock */
690 p_mb->pf_addb[i_b] = vdec_DummyBlock;
691 p_mb->pf_idct[i_b] = vdec_DummyIDCT;
696 p_data1 = (elem_t*) p_mb->p_picture->p_u
697 + (p_mb->i_c_x >> pi_chroma_hor[p_vpar->sequence.i_chroma_format])
698 + (p_mb->i_c_y >> pi_chroma_ver[p_vpar->sequence.i_chroma_format])
699 * (p_vpar->sequence.i_chroma_width);
700 p_data2 = (elem_t*) p_mb->p_picture->p_v
701 + (p_mb->i_c_x >> pi_chroma_hor[p_vpar->sequence.i_chroma_format])
702 + (p_mb->i_c_y >> pi_chroma_ver[p_vpar->sequence.i_chroma_format])
703 * (p_vpar->sequence.i_chroma_width);
705 for( i_b = 4; i_b < 4 + 2*p_vpar->sequence.i_chroma_nb_blocks;
706 i_b++, i_mask >>= 1 )
708 elem_t * pp_data[2] = {p_data1, p_data2};
710 if( p_vpar->mb.i_coded_block_pattern & i_mask )
712 memset( p_mb->ppi_blocks[i_b], 0, 64*sizeof(elem_t) );
713 (*pppf_decode_block[p_vpar->sequence.b_mpeg2]
714 [p_vpar->mb.i_mb_type & MB_INTRA])
715 ( p_vpar, p_mb, i_b );
717 /* decode_block has already set pf_idct and pi_sparse_pos. */
718 p_mb->pf_addb[i_b] = pf_addb;
720 /* Calculate block coordinates. */
721 p_mb->p_data[i_b] = pp_data[i_b & 1]
722 + pi_y[p_vpar->mb.b_dct_type][i_b]
723 * p_vpar->sequence.i_chroma_width;
727 /* Block not coded, so no IDCT, nor AddBlock */
728 p_mb->pf_addb[i_b] = vdec_DummyBlock;
729 p_mb->pf_idct[i_b] = vdec_DummyIDCT;
733 if( !( p_vpar->mb.i_mb_type & MB_INTRA ) )
735 static int pi_dc_dct_reinit[4] = {128,256,512,1024};
737 /* Reset DC predictors (7.2.1). */
738 p_vpar->slice.pi_dc_dct_pred[0] = p_vpar->slice.pi_dc_dct_pred[1]
739 = p_vpar->slice.pi_dc_dct_pred[2]
740 = pi_dc_dct_reinit[p_vpar->picture.i_intra_dc_precision];
742 else if( !p_vpar->picture.b_concealment_mv )
744 /* Reset MV predictors. */
745 bzero( p_vpar->slice.pppi_pmv, 8*sizeof(int) );
749 /*****************************************************************************
750 * InitMacroblock : Initialize macroblock values
751 *****************************************************************************/
752 static __inline__ void InitMacroblock( vpar_thread_t * p_vpar,
753 macroblock_t * p_mb )
755 static f_chroma_motion_t pf_chroma_motion[4] =
756 { NULL, vdec_Motion420, vdec_Motion422, vdec_Motion444 };
758 p_mb->p_picture = p_vpar->picture.p_picture;
759 p_mb->i_structure = p_vpar->picture.i_structure;
760 p_mb->i_current_structure = p_vpar->picture.i_current_structure;
761 p_mb->i_l_x = p_vpar->mb.i_l_x;
762 p_mb->i_l_y = p_vpar->mb.i_l_y;
763 p_mb->i_c_x = p_vpar->mb.i_c_x;
764 p_mb->i_c_y = p_vpar->mb.i_c_y;
765 p_mb->i_chroma_nb_blocks = p_vpar->sequence.i_chroma_nb_blocks;
766 p_mb->pf_chroma_motion = pf_chroma_motion[p_vpar->sequence.i_chroma_format];
767 p_mb->b_P_coding_type = ( p_vpar->picture.i_coding_type == P_CODING_TYPE );
769 p_mb->p_forward = p_vpar->sequence.p_forward;
770 p_mb->p_backward = p_vpar->sequence.p_backward;
772 p_mb->i_addb_l_stride = p_mb->i_l_stride = p_vpar->picture.i_l_stride;
773 p_mb->i_addb_c_stride = p_mb->i_c_stride = p_vpar->picture.i_c_stride;
775 /* Update macroblock real position. */
776 p_vpar->mb.i_l_x += 16;
777 p_vpar->mb.i_l_y += (p_vpar->mb.i_l_x / p_vpar->sequence.i_width)
778 * (2 - p_vpar->picture.b_frame_structure) * 16;
779 p_vpar->mb.i_l_x %= p_vpar->sequence.i_width;
781 p_vpar->mb.i_c_x += p_vpar->sequence.i_chroma_mb_width;
782 p_vpar->mb.i_c_y += (p_vpar->mb.i_c_x / p_vpar->sequence.i_chroma_width)
783 * (2 - p_vpar->picture.b_frame_structure)
784 * p_vpar->sequence.i_chroma_mb_height;
785 p_vpar->mb.i_c_x %= p_vpar->sequence.i_chroma_width;
788 /*****************************************************************************
789 * MacroblockAddressIncrement : Get the macroblock_address_increment field
790 *****************************************************************************/
791 static __inline__ int MacroblockAddressIncrement( vpar_thread_t * p_vpar )
793 /* Index in the lookup table mb_addr_inc */
794 int i_index = ShowBits( &p_vpar->bit_stream, 11 );
795 p_vpar->mb.i_addr_inc = 0;
796 /* Test the presence of the escape character */
797 while( i_index == 8 )
799 DumpBits( &p_vpar->bit_stream, 11 );
800 p_vpar->mb.i_addr_inc += 33;
801 i_index = ShowBits( &p_vpar->bit_stream, 11 );
803 /* Affect the value from the lookup table */
804 p_vpar->mb.i_addr_inc += p_vpar->pl_mb_addr_inc[i_index].i_value;
805 /* Dump the good number of bits */
806 DumpBits( &p_vpar->bit_stream, p_vpar->pl_mb_addr_inc[i_index].i_length );
809 /*****************************************************************************
810 * MacroblockModes : Get the macroblock_modes structure
811 *****************************************************************************/
812 static __inline__ void MacroblockModes( vpar_thread_t * p_vpar,
813 macroblock_t * p_mb )
815 static f_motion_t pf_motion[2][4] =
816 { {NULL, vdec_FieldFieldRecon, vdec_Field16x8Recon, vdec_FieldDMVRecon},
817 {NULL, vdec_FrameFieldRecon, vdec_FrameFrameRecon, vdec_FrameDMVRecon} };
818 static int ppi_mv_count[2][4] = { {0, 1, 2, 1}, {0, 2, 1, 1} };
819 static int ppi_mv_format[2][4] = { {0, 1, 1, 1}, {0, 1, 2, 1} };
821 /* Get macroblock_type. */
822 p_vpar->mb.i_mb_type = (p_vpar->picture.pf_macroblock_type)( p_vpar );
823 p_mb->i_mb_type = p_vpar->mb.i_mb_type;
825 /* SCALABILITY : warning, we don't know if spatial_temporal_weight_code
826 * has to be dropped, take care if you use scalable streams. */
827 /* DumpBits( &p_vpar->bit_stream, 2 ); */
829 if( p_mb->b_P_coding_type && !(p_vpar->mb.i_mb_type & (MB_MOTION_FORWARD|MB_INTRA)) )
831 /* Special No-MC macroblock in P pictures (7.6.3.5). */
832 memset( p_vpar->slice.pppi_pmv, 0, 8*sizeof(int) );
833 memset( p_mb->pppi_motion_vectors, 0, 8*sizeof(int) );
835 p_vpar->mb.i_motion_type = MOTION_FRAME;
836 p_mb->ppi_field_select[0][0] = ( p_vpar->picture.i_current_structure == BOTTOM_FIELD );
838 else if( !(p_vpar->mb.i_mb_type & (MB_MOTION_FORWARD | MB_MOTION_BACKWARD))
839 || p_vpar->picture.b_frame_pred_frame_dct )
841 /* If mb_type has neither MOTION_FORWARD nor MOTION_BACKWARD, this
842 * is useless, but also harmless. */
843 p_vpar->mb.i_motion_type = MOTION_FRAME;
847 p_vpar->mb.i_motion_type = GetBits( &p_vpar->bit_stream, 2 );
850 if( p_vpar->mb.i_mb_type & MB_INTRA )
852 /* For the intra macroblocks, we use an empty motion
853 * compensation function */
854 p_mb->pf_motion = vdec_DummyRecon;
858 p_mb->pf_motion = pf_motion[p_vpar->picture.b_frame_structure]
859 [p_vpar->mb.i_motion_type];
861 p_vpar->mb.i_mv_count = ppi_mv_count[p_vpar->picture.b_frame_structure]
862 [p_vpar->mb.i_motion_type];
863 p_vpar->mb.i_mv_format = ppi_mv_format[p_vpar->picture.b_frame_structure]
864 [p_vpar->mb.i_motion_type];
866 p_vpar->mb.b_dct_type = 0;
867 if( (p_vpar->picture.i_structure == FRAME_STRUCTURE) &&
868 (!p_vpar->picture.b_frame_pred_frame_dct) &&
869 (p_vpar->mb.i_mb_type & (MB_PATTERN|MB_INTRA)) )
871 if( p_vpar->mb.b_dct_type = GetBits( &p_vpar->bit_stream, 1 ) )
873 /* The DCT is coded on fields. Jump one line between each
875 p_mb->i_addb_l_stride <<= 1;
876 p_mb->i_addb_l_stride += 8;
877 /* With CHROMA_420, the DCT is necessarily frame-coded. */
878 if( p_vpar->sequence.i_chroma_format != CHROMA_420 )
880 p_mb->i_addb_c_stride <<= 1;
881 p_mb->i_addb_c_stride += 8;
886 p_vpar->mb.b_dmv = p_vpar->mb.i_motion_type == MOTION_DMV;
889 /*****************************************************************************
890 * vpar_IMBType : macroblock_type in I pictures
891 *****************************************************************************/
892 int vpar_IMBType( vpar_thread_t * p_vpar )
894 /* Take two bits for testing */
895 int i_type = ShowBits( &p_vpar->bit_stream, 2 );
896 /* Lookup table for macroblock_type */
897 static lookup_t pl_mb_Itype[4] = { {MB_ERROR, 0},
898 {MB_QUANT|MB_INTRA, 2},
901 /* Dump the good number of bits */
902 DumpBits( &p_vpar->bit_stream, pl_mb_Itype[i_type].i_length );
903 return pl_mb_Itype[i_type].i_value;
906 /*****************************************************************************
907 * vpar_PMBType : macroblock_type in P pictures
908 *****************************************************************************/
909 int vpar_PMBType( vpar_thread_t * p_vpar )
911 /* Testing on 6 bits */
912 int i_type = ShowBits( &p_vpar->bit_stream, 6 );
913 /* Dump the good number of bits */
914 DumpBits( &p_vpar->bit_stream, p_vpar->ppl_mb_type[0][i_type].i_length );
915 /* return the value from the lookup table for P type */
916 return p_vpar->ppl_mb_type[0][i_type].i_value;
919 /*****************************************************************************
920 * vpar_BMBType : macroblock_type in B pictures
921 *****************************************************************************/
922 int vpar_BMBType( vpar_thread_t * p_vpar )
924 /* Testing on 6 bits */
925 int i_type = ShowBits( &p_vpar->bit_stream, 6 );
926 /* Dump the good number of bits */
927 DumpBits( &p_vpar->bit_stream, p_vpar->ppl_mb_type[1][i_type].i_length );
928 /* return the value from the lookup table for B type */
929 return p_vpar->ppl_mb_type[1][i_type].i_value;
932 /*****************************************************************************
933 * vpar_DMBType : macroblock_type in D pictures
934 *****************************************************************************/
935 int vpar_DMBType( vpar_thread_t * p_vpar )
938 int i_type = GetBits( &p_vpar->bit_stream, 1 );
940 static int pi_mb_Dtype[2] = { MB_ERROR, 1 };
941 return pi_mb_Dtype[i_type];
944 /*****************************************************************************
945 * vpar_CodedPattern420 : coded_block_pattern with 420 chroma
946 *****************************************************************************/
947 int vpar_CodedPattern420( vpar_thread_t * p_vpar )
949 /* Take the max 9 bits length vlc code for testing */
950 int i_vlc = ShowBits( &p_vpar->bit_stream, 9 );
951 /* Trash the good number of bits read in the lookup table */
952 DumpBits( &p_vpar->bit_stream, p_vpar->pl_coded_pattern[i_vlc].i_length );
953 /* return the value from the vlc table */
954 return p_vpar->pl_coded_pattern[i_vlc].i_value;
957 /*****************************************************************************
958 * vpar_CodedPattern422 : coded_block_pattern with 422 chroma
959 *****************************************************************************/
960 int vpar_CodedPattern422( vpar_thread_t * p_vpar )
962 int i_vlc = ShowBits( &p_vpar->bit_stream, 9 );
963 /* Supplementary 2 bits long code for 422 format */
964 int i_coded_block_pattern_1;
965 DumpBits( &p_vpar->bit_stream, p_vpar->pl_coded_pattern[i_vlc].i_length );
966 i_coded_block_pattern_1 = GetBits( &p_vpar->bit_stream, 2 );
967 /* the code is just to be added to the value found in the table */
968 return p_vpar->pl_coded_pattern[i_vlc].i_value |
969 (i_coded_block_pattern_1 << 6);
972 /*****************************************************************************
973 * vpar_CodedPattern444 : coded_block_pattern with 444 chroma
974 *****************************************************************************/
975 int vpar_CodedPattern444( vpar_thread_t * p_vpar )
977 int i_vlc = ShowBits( &p_vpar->bit_stream, 9 );
978 int i_coded_block_pattern_2;
979 DumpBits( &p_vpar->bit_stream, p_vpar->pl_coded_pattern[i_vlc].i_length );
980 i_coded_block_pattern_2 = GetBits( &p_vpar->bit_stream, 6 );
981 return p_vpar->pl_coded_pattern[i_vlc].i_value |
982 ( i_coded_block_pattern_2 << 6 );
985 /*****************************************************************************
986 * vpar_DecodeMPEG1Non : decode MPEG-1 non-intra blocks
987 *****************************************************************************/
988 static void vpar_DecodeMPEG1Non( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b )
991 if( p_vpar->picture.i_coding_type == D_CODING_TYPE )
993 /* Remove end_of_macroblock (always 1, prevents startcode emulation)
994 * ISO/IEC 11172-2 section 2.4.2.7 and 2.4.3.6 */
995 DumpBits( &p_vpar->bit_stream, 1 );
999 /*****************************************************************************
1000 * vpar_DecodeMPEG1Intra : decode MPEG-1 intra blocks
1001 *****************************************************************************/
1002 static void vpar_DecodeMPEG1Intra( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b )
1005 if( p_vpar->picture.i_coding_type == D_CODING_TYPE )
1007 /* Remove end_of_macroblock (always 1, prevents startcode emulation)
1008 * ISO/IEC 11172-2 section 2.4.2.7 and 2.4.3.6 */
1009 DumpBits( &p_vpar->bit_stream, 1 );
1013 /*****************************************************************************
1014 * vpar_DecodeMPEG2Non : decode MPEG-2 non-intra blocks
1015 *****************************************************************************/
1016 static void vpar_DecodeMPEG2Non( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b )
1030 /* Lookup table for the offset in the tables for ac coef decoding */
1031 static lookup_t pl_offset_table[8] = { { 12, 4 }, { 8, 4 }, { 6, 8 },
1032 { 4, 16 }, { 3, 16 }, { 2, 16 },
1033 { 1, 16 }, { 0, 16 } };
1034 /* There is no special decodding for DC coefficient in non intra blocs
1035 * except that we won't use exactly the same table B.14 note 3 & 4 */
1036 /* Decoding of the coefficients */
1044 for( i_dummy = 0; i_dummy < 64; i_dummy++ )
1046 i_code = ShowBits( &p_vpar->bit_stream, 16 );
1047 i_2b = ! ( i_code >> 14 );
1048 i_4b = ! ( ( i_code & 0x3C00 ) >> 10 );
1049 /* Will contain the number of table to use in ppl_dct_coef */
1050 i_select = i_2b + i_4b + ( i_code & 0x0200 ) + ( i_code & 0x0100 ) +
1051 ( i_code & 0x0080 ) + ( i_code & 0x0040 ) +
1052 ( i_code & 0x0020 ) + ( i_code & 0x0010 );
1053 /* Shall we use the first table or the next tables */
1054 i_type = ( i_select & 1 ) & ( i_dummy & 0 );
1056 i_offset = ( i_code >> pl_offset_table[i_select].i_value ) -
1057 pl_offset_table[i_select].i_length;
1058 i_run = ( * ( p_vpar->ppl_dct_coef[i_select]
1059 + ( i_offset * sizeof(dct_lookup_t) ) ) ).i_run;
1060 DumpBits( &p_vpar->bit_stream,
1061 ( * ( p_vpar->ppl_dct_coef[i_select]
1062 + ( i_offset * sizeof(dct_lookup_t) ) ) ).i_length );
1066 i_run = GetBits( &p_vpar->bit_stream, 6 );
1067 i_level = GetBits( &p_vpar->bit_stream, 12 );
1068 p_mb->ppi_blocks[i_b][i_dummy] = ( b_sign = ( i_level > 2047 ) )
1069 ? ( -4096 + i_level )
1079 i_level = ( * ( p_vpar->ppl_dct_coef[i_select]
1080 + ( i_offset * sizeof(dct_lookup_t) ) ) ).i_level;
1081 b_sign = GetBits( &p_vpar->bit_stream, 1 );
1082 p_mb->ppi_blocks[i_b][i_dummy] = b_sign ? -i_level : i_level;
1090 p_mb->pf_idct[i_b] = vdec_SparseIDCT;
1091 p_mb->pi_sparse_pos[i_b] = i_coef;
1095 p_mb->pf_idct[i_b] = vdec_IDCT;
1099 /*****************************************************************************
1100 * vpar_DecodeMPEG2Intra : decode MPEG-2 intra blocks
1101 *****************************************************************************/
1102 static void vpar_DecodeMPEG2Intra( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b )
1121 /* Lookup Table for the chromatic component */
1122 static int pi_cc_index[12] = { 0, 0, 0, 0, 1, 2, 1, 2, 1, 2 };
1123 /* Lookup table for the offset in the tables for ac coef decoding */
1124 static lookup_t pl_offset_table[8] = { { 12, 4 }, { 8, 4 }, { 6, 8 },
1125 { 4, 16 }, { 3, 16 }, { 2, 16 },
1126 { 1, 16 }, { 0, 16 } };
1127 i_cc = pi_cc_index[i_b];
1128 /* Determine whether it is luminance or not (chrominance) */
1129 i_type = ( i_cc + 1 ) >> 1;
1131 /* Decoding of the DC intra coefficient */
1132 /* The nb of bits to parse depends on i_type */
1133 i_code = ShowBits( &p_vpar->bit_stream, 9 + i_type );
1134 /* To reduce memory occupation, there are two lookup tables
1135 * See InitDCT above */
1136 i_code5 = i_code >> 4;
1137 /* Shall we lookup in the first or in the second table ? */
1138 i_select = ( i_code5 - 1 ) / 31;
1139 /* Offset value for looking in the second table */
1140 i_offset = 0x1f0 + ( i_type * 0x1f0 );
1141 i_pos = ( i_code5 * ( ! i_select ) ) + ( ( i_code - i_offset ) * i_select );
1142 i_dct_dc_size = p_vpar->pppl_dct_dc_size[i_type][i_select][i_pos].i_value;
1143 /* Dump the variable length code */
1144 DumpBits( &p_vpar->bit_stream,
1145 p_vpar->pppl_dct_dc_size[i_type][i_select][i_pos].i_length );
1146 /* Read the actual code with the good length */
1147 i_dct_dc_diff = GetBits( &p_vpar->bit_stream, i_dct_dc_size );
1148 p_vpar->slice.pi_dc_dct_pred[i_cc] += i_dct_dc_diff;
1150 p_mb->ppi_blocks[i_b][0] = ( p_vpar->slice.pi_dc_dct_pred[i_cc] <<
1151 ( 3 - p_vpar->picture.i_intra_dc_precision ) );
1154 p_mb->ppi_blocks[i_b][0] = ( p_vpar->slice.pi_dc_dct_pred[i_cc] <<
1155 ( 11 - p_vpar->picture.i_intra_dc_precision ) );
1156 i_nc = ( p_vpar->slice.pi_dc_dct_pred[i_cc] != 0 );
1159 /* Decoding of the AC coefficients */
1161 for( i_dummy = 1; i_dummy < 64; i_dummy++ )
1163 i_code = ShowBits( &p_vpar->bit_stream, 16 );
1164 i_2b = ! ( i_code >> 14 );
1165 i_4b = ! ( ( i_code & 0x3C00 ) >> 10 );
1166 /* Will contain the number of table to use in ppl_dct_coef */
1167 i_select = i_2b + i_4b + ( i_code & 0x0200 ) + ( i_code & 0x0100 ) +
1168 ( i_code & 0x0080 ) + ( i_code & 0x0040 ) +
1169 ( i_code & 0x0020 ) + ( i_code & 0x0010 );
1170 /* Shall we use B15 table or not */
1171 i_type = p_vpar->picture.b_intra_vlc_format & ( ( i_select & 3 ) >> 1 );
1172 i_select += (i_type * 7 );
1173 i_offset = ( i_code >> pl_offset_table[i_select].i_value ) -
1174 pl_offset_table[i_select].i_length;
1175 i_run = ( * ( p_vpar->ppl_dct_coef[i_select]
1176 + ( i_offset * sizeof(dct_lookup_t) ) ) ).i_run;
1177 DumpBits( &p_vpar->bit_stream,
1178 ( * ( p_vpar->ppl_dct_coef[i_select]
1179 + ( i_offset * sizeof(dct_lookup_t) ) ) ).i_length );
1183 i_run = GetBits( &p_vpar->bit_stream, 6 );
1184 i_level = GetBits( &p_vpar->bit_stream, 12 );
1185 p_mb->ppi_blocks[i_b][i_dummy] = ( b_sign = ( i_level > 2047 ) )
1186 ? ( -4096 + i_level )
1196 i_level = ( * ( p_vpar->ppl_dct_coef[i_select]
1197 + ( i_offset * sizeof(dct_lookup_t) ) ) ).i_level;
1198 b_sign = GetBits( &p_vpar->bit_stream, 1 );
1199 p_mb->ppi_blocks[i_b][i_dummy] = b_sign ? -i_level : i_level;
1207 p_mb->pf_idct[i_b] = vdec_SparseIDCT;
1208 p_mb->pi_sparse_pos[i_b] = i_coef;
1212 p_mb->pf_idct[i_b] = vdec_IDCT;