1 /*****************************************************************************
2 * vpar_blocks.c : blocks parsing
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
21 *****************************************************************************/
23 /*****************************************************************************
25 *****************************************************************************/
28 #include <sys/types.h> /* on BSD, uio.h needs types.h */
29 #include <sys/uio.h> /* "input.h" */
38 #include "debug.h" /* XXX?? temporaire, requis par netlist.h */
41 #include "input_netlist.h"
42 #include "decoder_fifo.h"
44 #include "video_output.h"
46 #include "vdec_idct.h"
47 #include "video_decoder.h"
48 #include "vdec_motion.h"
50 #include "vpar_blocks.h"
51 #include "vpar_headers.h"
52 #include "vpar_synchro.h"
53 #include "video_parser.h"
54 #include "video_fifo.h"
56 static int i_count = 0;
59 * Welcome to vpar_blocks.c ! Here's where the heavy processor-critical parsing
60 * task is done. This file is divided in several parts :
61 * - Initialization of the lookup tables
62 * - Decoding of coded blocks
63 * - Decoding of motion vectors
64 * - Decoding of the other macroblock structures
65 * - Picture data parsing management (slices and error handling)
66 * It's a pretty long file. Good luck and have a nice day.
71 * Initialization tables
74 /* Table for coded_block_pattern resolution */
75 static lookup_t pl_coded_pattern[512] =
76 { {MB_ERROR, 0}, {0, 9}, {39, 9}, {27, 9}, {59, 9}, {55, 9}, {47, 9}, {31, 9},
77 {58, 8}, {58, 8}, {54, 8}, {54, 8}, {46, 8}, {46, 8}, {30, 8}, {30, 8},
78 {57, 8}, {57, 8}, {53, 8}, {53, 8}, {45, 8}, {45, 8}, {29, 8}, {29, 8},
79 {38, 8}, {38, 8}, {26, 8}, {26, 8}, {37, 8}, {37, 8}, {25, 8}, {25, 8},
80 {43, 8}, {43, 8}, {23, 8}, {23, 8}, {51, 8}, {51, 8}, {15, 8}, {15, 8},
81 {42, 8}, {42, 8}, {22, 8}, {22, 8}, {50, 8}, {50, 8}, {14, 8}, {14, 8},
82 {41, 8}, {41, 8}, {21, 8}, {21, 8}, {49, 8}, {49, 8}, {13, 8}, {13, 8},
83 {35, 8}, {35, 8}, {19, 8}, {19, 8}, {11, 8}, {11, 8}, {7, 8}, {7, 8},
84 {34, 7}, {34, 7}, {34, 7}, {34, 7}, {18, 7}, {18, 7}, {18, 7}, {18, 7},
85 {10, 7}, {10, 7}, {10, 7}, {10, 7}, {6, 7}, {6, 7}, {6, 7}, {6, 7},
86 {33, 7}, {33, 7}, {33, 7}, {33, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7},
87 {9, 7}, {9, 7}, {9, 7}, {9, 7}, {5, 7}, {5, 7}, {5, 7}, {5, 7},
88 {63, 6}, {63, 6}, {63, 6}, {63, 6}, {63, 6}, {63, 6}, {63, 6}, {63, 6},
89 {3, 6}, {3, 6}, {3, 6}, {3, 6}, {3, 6}, {3, 6}, {3, 6}, {3, 6},
90 {36, 6}, {36, 6}, {36, 6}, {36, 6}, {36, 6}, {36, 6}, {36, 6}, {36, 6},
91 {24, 6}, {24, 6}, {24, 6}, {24, 6}, {24, 6}, {24, 6}, {24, 6}, {24, 6},
92 {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5},
93 {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5},
94 {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5},
95 {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5},
96 {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5},
97 {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5},
98 {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5},
99 {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5},
100 {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5},
101 {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5},
102 {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5},
103 {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5},
104 {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5},
105 {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5},
106 {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5},
107 {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5},
108 {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5},
109 {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5},
110 {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5},
111 {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5},
112 {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5},
113 {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5},
114 {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5},
115 {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5},
116 {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
117 {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
118 {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
119 {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
120 {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
121 {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
122 {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
123 {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
124 {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4},
125 {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4},
126 {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4},
127 {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4},
128 {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4},
129 {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4},
130 {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4},
131 {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4},
132 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
133 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
134 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
135 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
136 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
137 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
138 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
139 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3} };
141 /* Tables for dc DCT coefficients
142 * Tables are cut in two parts to reduce memory occupation
145 /* Table B-12, dct_dc_size_luminance, codes 00XXX ... 11110 */
147 static lookup_t pl_dct_dc_lum_init_table_1[32] =
148 { {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
149 {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
150 {0, 3}, {0, 3}, {0, 3}, {0, 3}, {3, 3}, {3, 3}, {3, 3}, {3, 3},
151 {4, 3}, {4, 3}, {4, 3}, {4, 3}, {5, 4}, {5, 4}, {6, 5}, {MB_ERROR, 0}
154 static lookup_t ppl_dct_dc_init_table_1[2][32] =
155 { { {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
156 {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
157 {0, 3}, {0, 3}, {0, 3}, {0, 3}, {3, 3}, {3, 3}, {3, 3}, {3, 3},
158 {4, 3}, {4, 3}, {4, 3}, {4, 3}, {5, 4}, {5, 4}, {6, 5}, {MB_ERROR, 0}},
159 { {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2},
160 {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
161 {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
162 {3, 3}, {3, 3}, {3, 3}, {3, 3}, {4, 4}, {4, 4}, {5, 5}, {MB_ERROR, 0}
166 /* Table B-12, dct_dc_size_luminance, codes 111110xxx ... 111111111 */
168 static lookup_t pl_dct_dc_lum_init_table_2[32] =
169 { {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6},
170 {8, 7}, {8, 7}, {8, 7}, {8, 7}, {9, 8}, {9, 8}, {10,9}, {11,9},
171 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0},
172 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0},
173 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0},
174 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}
177 static lookup_t ppl_dct_dc_init_table_2[2][32] =
178 { { {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6},
179 {8, 7}, {8, 7}, {8, 7}, {8, 7}, {9, 8}, {9, 8}, {10,9}, {11,9},
180 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0},
181 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0},
182 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0},
183 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}},
184 { {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
185 {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
186 {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7},
187 {8, 8}, {8, 8}, {8, 8}, {8, 8}, {9, 9}, {9, 9}, {10,10}, {11,10}
191 /* Table B-13, dct_dc_size_chrominance, codes 00xxx ... 11110 */
192 static lookup_t pl_dct_dc_chrom_init_table_1[32] =
193 { {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2},
194 {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
195 {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
196 {3, 3}, {3, 3}, {3, 3}, {3, 3}, {4, 4}, {4, 4}, {5, 5}, {MB_ERROR, 0}
200 /* Table B-13, dct_dc_size_chrominance, codes 111110xxxx ... 1111111111 */
201 static lookup_t pl_dct_dc_chrom_init_table_2[32] =
202 { {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
203 {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
204 {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7},
205 {8, 8}, {8, 8}, {8, 8}, {8, 8}, {9, 9}, {9, 9}, {10,10}, {11,10}
209 /* Tables for ac DCT coefficients. There are cut in many parts to save space */
210 /* Table B-14, DCT coefficients table zero,
211 * codes 0100 ... 1xxx (used for first (DC) coefficient)
213 static dct_lookup_t pl_DCT_tab_dc[12] =
215 {0,2,4}, {2,1,4}, {1,1,3}, {1,1,3},
216 {0,1,1}, {0,1,1}, {0,1,1}, {0,1,1},
217 {0,1,1}, {0,1,1}, {0,1,1}, {0,1,1}
220 /* Table B-14, DCT coefficients table zero,
221 * codes 0100 ... 1xxx (used for all other coefficients)
223 static dct_lookup_t pl_DCT_tab_ac[12] =
225 {0,2,4}, {2,1,4}, {1,1,3}, {1,1,3},
226 {DCT_EOB,0,2}, {DCT_EOB,0,2}, {DCT_EOB,0,2}, {DCT_EOB,0,2}, /* EOB */
227 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2}
230 /* Table B-14, DCT coefficients table zero,
231 * codes 000001xx ... 00111xxx
233 static dct_lookup_t pl_DCT_tab0[60] =
235 {DCT_ESCAPE,0,6}, {DCT_ESCAPE,0,6}, {DCT_ESCAPE,0,6}, {DCT_ESCAPE,0,6},
237 {2,2,7}, {2,2,7}, {9,1,7}, {9,1,7},
238 {0,4,7}, {0,4,7}, {8,1,7}, {8,1,7},
239 {7,1,6}, {7,1,6}, {7,1,6}, {7,1,6},
240 {6,1,6}, {6,1,6}, {6,1,6}, {6,1,6},
241 {1,2,6}, {1,2,6}, {1,2,6}, {1,2,6},
242 {5,1,6}, {5,1,6}, {5,1,6}, {5,1,6},
243 {13,1,8}, {0,6,8}, {12,1,8}, {11,1,8},
244 {3,2,8}, {1,3,8}, {0,5,8}, {10,1,8},
245 {0,3,5}, {0,3,5}, {0,3,5}, {0,3,5},
246 {0,3,5}, {0,3,5}, {0,3,5}, {0,3,5},
247 {4,1,5}, {4,1,5}, {4,1,5}, {4,1,5},
248 {4,1,5}, {4,1,5}, {4,1,5}, {4,1,5},
249 {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
250 {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5}
253 /* Table B-15, DCT coefficients table one,
254 * codes 000001xx ... 11111111
256 static dct_lookup_t pl_DCT_tab0a[252] =
258 {65,0,6}, {65,0,6}, {65,0,6}, {65,0,6}, /* Escape */
259 {7,1,7}, {7,1,7}, {8,1,7}, {8,1,7},
260 {6,1,7}, {6,1,7}, {2,2,7}, {2,2,7},
261 {0,7,6}, {0,7,6}, {0,7,6}, {0,7,6},
262 {0,6,6}, {0,6,6}, {0,6,6}, {0,6,6},
263 {4,1,6}, {4,1,6}, {4,1,6}, {4,1,6},
264 {5,1,6}, {5,1,6}, {5,1,6}, {5,1,6},
265 {1,5,8}, {11,1,8}, {0,11,8}, {0,10,8},
266 {13,1,8}, {12,1,8}, {3,2,8}, {1,4,8},
267 {2,1,5}, {2,1,5}, {2,1,5}, {2,1,5},
268 {2,1,5}, {2,1,5}, {2,1,5}, {2,1,5},
269 {1,2,5}, {1,2,5}, {1,2,5}, {1,2,5},
270 {1,2,5}, {1,2,5}, {1,2,5}, {1,2,5},
271 {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
272 {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
273 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
274 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
275 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
276 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
277 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
278 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
279 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
280 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
281 {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4}, /* EOB */
282 {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
283 {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
284 {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
285 {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
286 {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
287 {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
288 {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
289 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
290 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
291 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
292 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
293 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
294 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
295 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
296 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
297 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
298 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
299 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
300 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
301 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
302 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
303 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
304 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
305 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
306 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
307 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
308 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
309 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
310 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
311 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
312 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
313 {0,4,5}, {0,4,5}, {0,4,5}, {0,4,5},
314 {0,4,5}, {0,4,5}, {0,4,5}, {0,4,5},
315 {0,5,5}, {0,5,5}, {0,5,5}, {0,5,5},
316 {0,5,5}, {0,5,5}, {0,5,5}, {0,5,5},
317 {9,1,7}, {9,1,7}, {1,3,7}, {1,3,7},
318 {10,1,7}, {10,1,7}, {0,8,7}, {0,8,7},
319 {0,9,7}, {0,9,7}, {0,12,8}, {0,13,8},
320 {2,3,8}, {4,2,8}, {0,14,8}, {0,15,8}
323 /* Table B-14, DCT coefficients table zero,
324 * codes 0000001000 ... 0000001111
326 static dct_lookup_t pl_DCT_tab1[8] =
328 {16,1,10}, {5,2,10}, {0,7,10}, {2,3,10},
329 {1,4,10}, {15,1,10}, {14,1,10}, {4,2,10}
332 /* Table B-15, DCT coefficients table one,
333 * codes 000000100x ... 000000111x
335 static dct_lookup_t pl_DCT_tab1a[8] =
337 {5,2,9}, {5,2,9}, {14,1,9}, {14,1,9},
338 {2,4,10}, {16,1,10}, {15,1,9}, {15,1,9}
341 /* Table B-14/15, DCT coefficients table zero / one,
342 * codes 000000010000 ... 000000011111
344 static dct_lookup_t pl_DCT_tab2[16] =
346 {0,11,12}, {8,2,12}, {4,3,12}, {0,10,12},
347 {2,4,12}, {7,2,12}, {21,1,12}, {20,1,12},
348 {0,9,12}, {19,1,12}, {18,1,12}, {1,5,12},
349 {3,3,12}, {0,8,12}, {6,2,12}, {17,1,12}
352 /* Table B-14/15, DCT coefficients table zero / one,
353 * codes 0000000010000 ... 0000000011111
355 static dct_lookup_t pl_DCT_tab3[16] =
357 {10,2,13}, {9,2,13}, {5,3,13}, {3,4,13},
358 {2,5,13}, {1,7,13}, {1,6,13}, {0,15,13},
359 {0,14,13}, {0,13,13}, {0,12,13}, {26,1,13},
360 {25,1,13}, {24,1,13}, {23,1,13}, {22,1,13}
363 /* Table B-14/15, DCT coefficients table zero / one,
364 * codes 00000000010000 ... 00000000011111
366 static dct_lookup_t pl_DCT_tab4[16] =
368 {0,31,14}, {0,30,14}, {0,29,14}, {0,28,14},
369 {0,27,14}, {0,26,14}, {0,25,14}, {0,24,14},
370 {0,23,14}, {0,22,14}, {0,21,14}, {0,20,14},
371 {0,19,14}, {0,18,14}, {0,17,14}, {0,16,14}
374 /* Table B-14/15, DCT coefficients table zero / one,
375 * codes 000000000010000 ... 000000000011111
377 static dct_lookup_t pl_DCT_tab5[16] =
379 {0,40,15}, {0,39,15}, {0,38,15}, {0,37,15},
380 {0,36,15}, {0,35,15}, {0,34,15}, {0,33,15},
381 {0,32,15}, {1,14,15}, {1,13,15}, {1,12,15},
382 {1,11,15}, {1,10,15}, {1,9,15}, {1,8,15}
385 /* Table B-14/15, DCT coefficients table zero / one,
386 * codes 0000000000010000 ... 0000000000011111
388 static dct_lookup_t pl_DCT_tab6[16] =
390 {1,18,16}, {1,17,16}, {1,16,16}, {1,15,16},
391 {6,3,16}, {16,2,16}, {15,2,16}, {14,2,16},
392 {13,2,16}, {12,2,16}, {11,2,16}, {31,1,16},
393 {30,1,16}, {29,1,16}, {28,1,16}, {27,1,16}
396 /* Pointers on tables of dct coefficients */
397 static dct_lookup_t * ppl_dct_tab1[2] = { pl_DCT_tab_ac, pl_DCT_tab0a };
399 static dct_lookup_t * ppl_dct_tab2[2] = { pl_DCT_tab_ac, pl_DCT_tab_dc };
402 /* Lookup Table for the chromatic component */
403 static int pi_cc_index[12] = { 0, 0, 0, 0, 1, 2, 1, 2, 1, 2 };
407 * Initialization of lookup tables
410 /*****************************************************************************
411 * vpar_InitCrop : Initialize the crop table for saturation
412 * (ISO/IEC 13818-2 section 7.4.3)
413 *****************************************************************************/
414 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
415 void vpar_InitCrop( vpar_thread_t * p_vpar )
419 p_vpar->pi_crop = p_vpar->pi_crop_buf + 4096;
421 for( i_dummy = -4096; i_dummy < -2048; i_dummy++ )
423 p_vpar->pi_crop[i_dummy] = -2048;
425 for( ; i_dummy < 2047; i_dummy++ )
427 p_vpar->pi_crop[i_dummy] = i_dummy;
429 for( ; i_dummy < 4095; i_dummy++ )
431 p_vpar->pi_crop[i_dummy] = 2047;
436 /*****************************************************************************
437 * vpar_InitMbAddrInc : Initialize the lookup table for mb_addr_inc
438 *****************************************************************************/
440 /* Function for filling up the lookup table for mb_addr_inc */
441 static void FillMbAddrIncTable( vpar_thread_t * p_vpar,
442 int i_start, int i_end, int i_step,
443 int * pi_value, int i_length )
446 for( i_pos = i_start ; i_pos < i_end ; i_pos += i_step )
448 for( i_offset = 0 ; i_offset < i_step ; i_offset ++ )
450 p_vpar->pl_mb_addr_inc[i_pos + i_offset].i_value = * pi_value;
451 p_vpar->pl_mb_addr_inc[i_pos + i_offset].i_length = i_length;
457 /* Function that initialize the table using the last one */
458 void vpar_InitMbAddrInc( vpar_thread_t * p_vpar )
463 for( i_dummy = 0 ; i_dummy < 8 ; i_dummy++ )
465 p_vpar->pl_mb_addr_inc[i_dummy].i_value = MB_ERROR;
466 p_vpar->pl_mb_addr_inc[i_dummy].i_length = 0;
469 p_vpar->pl_mb_addr_inc[8].i_value = MB_ADDRINC_ESCAPE;
470 p_vpar->pl_mb_addr_inc[8].i_length = 11;
472 for( i_dummy = 9 ; i_dummy < 15 ; i_dummy ++ )
474 p_vpar->pl_mb_addr_inc[i_dummy].i_value = MB_ERROR;
475 p_vpar->pl_mb_addr_inc[i_dummy].i_length = 0;
478 p_vpar->pl_mb_addr_inc[15].i_value = MB_ADDRINC_STUFFING;
479 p_vpar->pl_mb_addr_inc[15].i_length = 11;
481 for( i_dummy = 16; i_dummy < 24; i_dummy++ )
483 p_vpar->pl_mb_addr_inc[i_dummy].i_value = MB_ERROR;
484 p_vpar->pl_mb_addr_inc[i_dummy].i_length = 0;
489 FillMbAddrIncTable( p_vpar, 24, 36, 1, &i_value, 11 );
490 FillMbAddrIncTable( p_vpar, 36, 48, 2, &i_value, 10 );
491 FillMbAddrIncTable( p_vpar, 48, 96, 8, &i_value, 8 );
492 FillMbAddrIncTable( p_vpar, 96, 128, 16, &i_value, 7 );
493 FillMbAddrIncTable( p_vpar, 128, 256, 64, &i_value, 5 );
494 FillMbAddrIncTable( p_vpar, 256, 512, 128, &i_value, 4 );
495 FillMbAddrIncTable( p_vpar, 512, 1024, 256, &i_value, 3 );
496 FillMbAddrIncTable( p_vpar, 1024, 2048, 1024, &i_value, 1 );
499 /*****************************************************************************
500 * vpar_Init*MBType : Initialize lookup table for the Macroblock type
501 *****************************************************************************/
503 /* Fonction for filling up the tables */
504 static void FillMBType( vpar_thread_t * p_vpar,
513 for( i_dummy = i_start ; i_dummy < i_end ; i_dummy++ )
515 p_vpar->ppl_mb_type[i_mb_type][i_dummy].i_value = i_value;
516 p_vpar->ppl_mb_type[i_mb_type][i_dummy].i_length = i_length;
520 /* Fonction that fills the table for P MB_Type */
521 void vpar_InitPMBType( vpar_thread_t * p_vpar )
523 FillMBType( p_vpar, 0, 32, 64, MB_MOTION_FORWARD|MB_PATTERN, 1 );
524 FillMBType( p_vpar, 0, 16, 32, MB_PATTERN, 2 );
525 FillMBType( p_vpar, 0, 8, 16, MB_MOTION_FORWARD, 3 );
526 FillMBType( p_vpar, 0, 6, 8, MB_INTRA, 5 );
527 FillMBType( p_vpar, 0, 4, 6, MB_QUANT|MB_MOTION_FORWARD|MB_PATTERN, 5 );
528 FillMBType( p_vpar, 0, 2, 4, MB_QUANT|MB_PATTERN, 5 );
529 p_vpar->ppl_mb_type[0][1].i_value = MB_QUANT|MB_INTRA;
530 p_vpar->ppl_mb_type[0][1].i_length = 6;
531 p_vpar->ppl_mb_type[0][0].i_value = MB_ERROR;
532 p_vpar->ppl_mb_type[0][0].i_length = 0;
535 /* Fonction that fills the table for B MB_Type */
536 void vpar_InitBMBType( vpar_thread_t * p_vpar )
538 FillMBType( p_vpar, 1, 48, 64, MB_MOTION_FORWARD
539 |MB_MOTION_BACKWARD|MB_PATTERN, 2 );
540 FillMBType( p_vpar, 1, 32, 48, MB_MOTION_FORWARD|MB_MOTION_BACKWARD, 2 );
541 FillMBType( p_vpar, 1, 24, 32, MB_MOTION_BACKWARD|MB_PATTERN, 3 );
542 FillMBType( p_vpar, 1, 16, 24, MB_MOTION_BACKWARD, 3 );
543 FillMBType( p_vpar, 1, 12, 16, MB_MOTION_FORWARD|MB_PATTERN, 4 );
544 FillMBType( p_vpar, 1, 8, 12, MB_MOTION_FORWARD, 4 );
545 FillMBType( p_vpar, 1, 6, 8, MB_INTRA, 5 );
546 FillMBType( p_vpar, 1, 4, 6, MB_QUANT|MB_MOTION_FORWARD
547 |MB_MOTION_BACKWARD|MB_PATTERN, 5 );
548 p_vpar->ppl_mb_type[1][3].i_value = MB_QUANT|MB_MOTION_FORWARD|MB_PATTERN;
549 p_vpar->ppl_mb_type[1][3].i_length = 6;
550 p_vpar->ppl_mb_type[1][2].i_value = MB_QUANT|MB_MOTION_BACKWARD|MB_PATTERN;
551 p_vpar->ppl_mb_type[1][2].i_length = 6;
552 p_vpar->ppl_mb_type[1][1].i_value = MB_QUANT|MB_INTRA;
553 p_vpar->ppl_mb_type[1][1].i_length = 6;
554 p_vpar->ppl_mb_type[1][0].i_value =MB_ERROR;
555 p_vpar->ppl_mb_type[1][0].i_length = 0;
559 /*****************************************************************************
560 * vpar_InitDCTTables : Initialize tables giving the length of the dct
561 * coefficient from the vlc code
562 *****************************************************************************/
564 /* First fonction for filling the table */
565 static void FillDCTTable( dct_lookup_t * p_tab_dest, dct_lookup_t * p_tab_src,
566 int i_step, int i_nb_elem, int i_offset )
568 int i_dummy, i_dummy2;
570 for( i_dummy=0 ; i_dummy < i_nb_elem ; i_dummy++ )
572 for( i_dummy2=0 ; i_dummy2 < i_step ; i_dummy2++ )
574 p_tab_dest[(i_dummy+i_offset)*i_step+i_dummy2] = p_tab_src[i_dummy];
580 /* Fonction that actually fills the table or create the pointers */
581 void vpar_InitDCTTables( vpar_thread_t * p_vpar )
583 /* Tables are cut in two parts to reduce memory occupation */
584 p_vpar->pppl_dct_dc_size[0][0] = pl_dct_dc_lum_init_table_1;
585 p_vpar->pppl_dct_dc_size[0][1] = pl_dct_dc_lum_init_table_2;
586 p_vpar->pppl_dct_dc_size[1][0] = pl_dct_dc_chrom_init_table_1;
587 p_vpar->pppl_dct_dc_size[1][1] = pl_dct_dc_chrom_init_table_2;
589 /* XXX?? MB_ERROR is replaced by 0 because if we use -1 we
590 * can block in DecodeMPEG2Intra and others */
591 memset( p_vpar->ppl_dct_coef[0], 0, 16 );
592 memset( p_vpar->ppl_dct_coef[1], 0, 16 );
594 /* For table B14 & B15, we have a pointer to tables */
595 /* We fill the table thanks to the fonction defined above */
596 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab0, 256, 60, 4 );
597 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab1, 64, 8, 8 );
598 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab2, 16, 16, 16 );
599 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab3, 8, 16, 16 );
600 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab4, 4, 16, 16 );
601 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab5, 2, 16, 16 );
602 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab6, 1, 16, 16 );
604 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab0a, 256, 60, 4 );
605 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab1a, 64, 8, 8 );
606 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab2, 16, 16, 16 );
607 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab3, 8, 16, 16 );
608 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab4, 4, 16, 16 );
609 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab5, 2, 16, 16 );
610 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab6, 1, 16, 16 );
618 /*****************************************************************************
619 * DecodeMPEG1NonIntra : decode MPEG-1 non-intra blocks
620 *****************************************************************************/
621 static void DecodeMPEG1NonIntra( vpar_thread_t * p_vpar,
622 macroblock_t * p_mb, int i_b,
623 int i_chroma_format )
638 /* Give the chromatic component (0, 1, 2) */
639 i_cc = pi_cc_index[i_b];
641 /* Determine whether it is luminance or not (chrominance) */
642 b_chroma = ( i_cc + 1 ) >> 1;
644 /* There should be no D picture in non-intra blocks */
645 if( p_vpar->picture.i_coding_type == D_CODING_TYPE )
646 intf_ErrMsg("vpar error : D-picture in non intra block\n");
648 /* Decoding of the AC coefficients */
654 for( i_parse = 0; !p_vpar->b_die; i_parse++ )
656 i_code = ShowBits( &p_vpar->bit_stream, 16 );
657 if( i_code >= 16384 )
659 b_dc = !((i_parse + 62)/63);
660 i_run = ppl_dct_tab2[b_dc][(i_code>>12)-4].i_run;
661 i_level = ppl_dct_tab2[b_dc][(i_code>>12)-4].i_level;
662 i_length = ppl_dct_tab2[b_dc][(i_code>>12)-4].i_length;
666 i_run = p_vpar->ppl_dct_coef[0][i_code].i_run;
667 i_length = p_vpar->ppl_dct_coef[0][i_code].i_length;
668 i_level = p_vpar->ppl_dct_coef[0][i_code].i_level;
671 RemoveBits( &p_vpar->bit_stream, i_length );
676 i_run = GetBits( &p_vpar->bit_stream, 6 );
677 i_level = GetBits( &p_vpar->bit_stream, 8 );
679 i_level = GetBits( &p_vpar->bit_stream, 8 );
680 else if (i_level == 128)
681 i_level = GetBits( &p_vpar->bit_stream, 8 ) - 256;
682 else if (i_level > 128)
691 /* The MMX IDCT has a precision problem with non-intra
693 p_mb->ppi_blocks[i_b][0] += 4;
697 p_mb->pf_idct[i_b] = vdec_SparseIDCT;
698 p_mb->pi_sparse_pos[i_b] = i_coef;
702 p_mb->pf_idct[i_b] = vdec_IDCT;
708 b_sign = GetBits( &p_vpar->bit_stream, 1 );
719 i_pos = pi_scan[p_vpar->picture.b_alternate_scan][i_parse];
720 i_level = ( ((i_level << 1) + 1) * p_vpar->mb.i_quantizer_scale
721 * p_vpar->sequence.nonintra_quant.pi_matrix[i_pos] ) >> 4;
722 p_mb->ppi_blocks[i_b][i_pos] = b_sign ? -i_level : i_level;
725 intf_ErrMsg("vpar error: DCT coeff (non-intra) is out of bounds\n");
726 p_vpar->picture.b_error = 1;
729 /*****************************************************************************
730 * DecodeMPEG1Intra : decode MPEG-1 intra blocks
731 *****************************************************************************/
732 static void DecodeMPEG1Intra( vpar_thread_t * p_vpar,
733 macroblock_t * p_mb, int i_b ,
734 int i_chroma_format )
750 /* Give the chromatic component (0, 1, 2) */
751 i_cc = pi_cc_index[i_b];
753 /* Determine whether it is luminance or not (chrominance) */
754 b_chroma = ( i_cc + 1 ) >> 1;
757 i_code = ShowBits(&p_vpar->bit_stream, 5);
761 i_dct_dc_size = ppl_dct_dc_init_table_1[b_chroma][i_code].i_value;
762 i_length = ppl_dct_dc_init_table_1[b_chroma][i_code].i_length;
763 RemoveBits( &p_vpar->bit_stream, i_length);
767 i_code = ShowBits(&p_vpar->bit_stream, (9+b_chroma)) - (0x1f0 * (b_chroma + 1));
768 i_dct_dc_size = ppl_dct_dc_init_table_2[b_chroma][i_code].i_value;
769 i_length = ppl_dct_dc_init_table_2[b_chroma][i_code].i_length;
770 RemoveBits( &p_vpar->bit_stream, i_length);
773 if (i_dct_dc_size == 0)
777 i_dct_dc_diff = GetBits( &p_vpar->bit_stream, i_dct_dc_size);
778 if ((i_dct_dc_diff & (1<<(i_dct_dc_size-1))) == 0)
779 i_dct_dc_diff -= (1<<i_dct_dc_size) - 1;
782 /* Read the actual code with the good length */
783 p_vpar->mb.pi_dc_dct_pred[i_cc] += i_dct_dc_diff;
785 p_mb->ppi_blocks[i_b][0] = p_vpar->mb.pi_dc_dct_pred[i_cc];
787 i_nc = ( p_vpar->mb.pi_dc_dct_pred[i_cc] != 0 );
790 if( p_vpar->picture.i_coding_type == D_CODING_TYPE )
792 /* Remove end_of_macroblock (always 1, prevents startcode emulation)
793 * ISO/IEC 11172-2 section 2.4.2.7 and 2.4.3.6 */
794 RemoveBits( &p_vpar->bit_stream, 1 );
795 /* D pictures do not have AC coefficients */
800 /* Decoding of the AC coefficients */
805 for( i_parse = 1; !p_vpar->b_die/*i_parse < 64*/; i_parse++ )
807 i_code = ShowBits( &p_vpar->bit_stream, 16 );
808 /* We use 2 main tables for the coefficients */
809 if( i_code >= 16384 )
811 i_run = ppl_dct_tab1[0][(i_code>>12)-4].i_run;
812 i_level = ppl_dct_tab1[0][(i_code>>12)-4].i_level;
813 i_length = ppl_dct_tab1[0][(i_code>>12)-4].i_length;
817 i_run = p_vpar->ppl_dct_coef[0][i_code].i_run;
818 i_length = p_vpar->ppl_dct_coef[0][i_code].i_length;
819 i_level = p_vpar->ppl_dct_coef[0][i_code].i_level;
822 RemoveBits( &p_vpar->bit_stream, i_length );
827 i_run = GetBits( &p_vpar->bit_stream, 6 );
828 i_level = GetBits( &p_vpar->bit_stream, 8 );
830 i_level = GetBits( &p_vpar->bit_stream, 8 );
831 else if (i_level == 128)
832 i_level = GetBits( &p_vpar->bit_stream, 8 ) - 256;
833 else if (i_level > 128)
839 p_mb->pf_idct[i_b] = vdec_SparseIDCT;
840 p_mb->pi_sparse_pos[i_b] = i_coef;
844 p_mb->pf_idct[i_b] = vdec_IDCT;
850 b_sign = GetBits( &p_vpar->bit_stream, 1 );
853 /* Prepare the next block */
860 /* We have an error in the stream */
864 /* Determine the position of the block in the frame */
865 i_pos = pi_scan[p_vpar->picture.b_alternate_scan][i_parse];
866 i_level = ( i_level *
867 p_vpar->mb.i_quantizer_scale *
868 p_vpar->sequence.intra_quant.pi_matrix[i_pos] ) >> 3;
869 p_mb->ppi_blocks[i_b][i_pos] = b_sign ? -i_level : i_level;
872 intf_ErrMsg("vpar error: DCT coeff (intra) is out of bounds\n");
873 p_vpar->picture.b_error = 1;
876 /*****************************************************************************
877 * DecodeMPEG2NonIntra : decode MPEG-2 non-intra blocks
878 *****************************************************************************/
879 static void DecodeMPEG2NonIntra( vpar_thread_t * p_vpar,
880 macroblock_t * p_mb, int i_b,
881 int i_chroma_format )
897 /* Give the chromatic component (0, 1, 2) */
898 i_cc = pi_cc_index[i_b];
900 /* Determine whether it is luminance or not (chrominance) */
901 b_chroma = ( i_cc + 1 ) >> 1;
903 /* Give a pointer to the quantization matrices for intra blocks */
904 if( (i_chroma_format == CHROMA_420) || (!b_chroma) )
906 pi_quant = p_vpar->sequence.nonintra_quant.pi_matrix;
910 pi_quant = p_vpar->sequence.chroma_nonintra_quant.pi_matrix;
913 /* Decoding of the AC coefficients */
917 for( i_parse = 0; !p_vpar->b_die; i_parse++ )
919 i_code = ShowBits( &p_vpar->bit_stream, 16 );
920 if( i_code >= 16384 )
922 b_dc = (i_parse == 0);
923 i_run = ppl_dct_tab2[b_dc][(i_code>>12)-4].i_run;
924 i_level = ppl_dct_tab2[b_dc][(i_code>>12)-4].i_level;
925 i_length = ppl_dct_tab2[b_dc][(i_code>>12)-4].i_length;
929 i_run = p_vpar->ppl_dct_coef[0][i_code].i_run;
930 i_length = p_vpar->ppl_dct_coef[0][i_code].i_length;
931 i_level = p_vpar->ppl_dct_coef[0][i_code].i_level;
935 RemoveBits( &p_vpar->bit_stream, i_length );
940 i_run = GetBits( &p_vpar->bit_stream, 6 );
941 i_level = GetBits( &p_vpar->bit_stream, 12 );
942 i_level = (b_sign = ( i_level > 2047 )) ? 4096 - i_level
947 /* The MMX IDCT has a precision problem with non-intra
949 p_mb->ppi_blocks[i_b][0] += 4;
953 p_mb->pf_idct[i_b] = vdec_SparseIDCT;
954 p_mb->pi_sparse_pos[i_b] = i_coef;
958 p_mb->pf_idct[i_b] = vdec_IDCT;
964 b_sign = GetBits( &p_vpar->bit_stream, 1 );
975 i_pos = pi_scan[p_vpar->picture.b_alternate_scan][i_parse];
976 i_level = ( ((i_level << 1) + 1) * p_vpar->mb.i_quantizer_scale
977 * pi_quant[i_pos] ) >> 5;
978 p_mb->ppi_blocks[i_b][i_pos] = b_sign ? -i_level : i_level;
981 intf_ErrMsg("vpar error: DCT coeff (non-intra) is out of bounds\n");
982 p_vpar->picture.b_error = 1;
985 /*****************************************************************************
986 * DecodeMPEG2Intra : decode MPEG-2 intra blocks
987 *****************************************************************************/
988 static void DecodeMPEG2Intra( vpar_thread_t * p_vpar,
989 macroblock_t * p_mb, int i_b,
990 int i_chroma_format )
1003 boolean_t b_vlc_intra;
1008 /* Give the chromatic component (0, 1, 2) */
1009 i_cc = pi_cc_index[i_b];
1011 /* Determine whether it is luminance or not (chrominance) */
1012 b_chroma = ( i_cc + 1 ) >> 1;
1014 /* Give a pointer to the quantization matrices for intra blocks */
1015 if( (i_chroma_format == CHROMA_420) || (!b_chroma) )
1017 pi_quant = p_vpar->sequence.intra_quant.pi_matrix;
1021 pi_quant = p_vpar->sequence.chroma_intra_quant.pi_matrix;
1025 i_code = ShowBits(&p_vpar->bit_stream, 5);
1029 i_dct_dc_size = ppl_dct_dc_init_table_1[b_chroma][i_code].i_value;
1030 i_length = ppl_dct_dc_init_table_1[b_chroma][i_code].i_length;
1031 RemoveBits( &p_vpar->bit_stream, i_length);
1035 i_code = ShowBits(&p_vpar->bit_stream, (9+b_chroma)) - (0x1f0 * (b_chroma + 1));
1036 i_dct_dc_size = ppl_dct_dc_init_table_2[b_chroma][i_code].i_value;
1037 i_length = ppl_dct_dc_init_table_2[b_chroma][i_code].i_length;
1038 RemoveBits( &p_vpar->bit_stream, i_length);
1041 if (i_dct_dc_size == 0)
1045 i_dct_dc_diff = GetBits( &p_vpar->bit_stream, i_dct_dc_size);
1046 if ((i_dct_dc_diff & (1<<(i_dct_dc_size-1))) == 0)
1047 i_dct_dc_diff -= (1<<i_dct_dc_size) - 1;
1050 /* Read the actual code with the good length */
1051 p_vpar->mb.pi_dc_dct_pred[i_cc] += i_dct_dc_diff;
1053 p_mb->ppi_blocks[i_b][0] = ( p_vpar->mb.pi_dc_dct_pred[i_cc] <<
1054 ( 3 - p_vpar->picture.i_intra_dc_precision ) );
1056 i_nc = ( p_vpar->mb.pi_dc_dct_pred[i_cc] != 0 );
1059 /* Decoding of the AC coefficients */
1062 b_vlc_intra = p_vpar->picture.b_intra_vlc_format;
1063 for( i_parse = 1; !p_vpar->b_die/*i_parse < 64*/; i_parse++ )
1065 i_code = ShowBits( &p_vpar->bit_stream, 16 );
1066 /* We use 2 main tables for the coefficients */
1067 if( i_code >= 16384 )
1069 i_run = ppl_dct_tab1[b_vlc_intra][(i_code>>(12-(4*b_vlc_intra)))-4].i_run;
1070 i_level = ppl_dct_tab1[b_vlc_intra][(i_code>>(12-(4*b_vlc_intra)))-4].i_level;
1071 i_length = ppl_dct_tab1[b_vlc_intra][(i_code>>(12-(4*b_vlc_intra)))-4].i_length;
1075 i_run = p_vpar->ppl_dct_coef[b_vlc_intra][i_code].i_run;
1076 i_length = p_vpar->ppl_dct_coef[b_vlc_intra][i_code].i_length;
1077 i_level = p_vpar->ppl_dct_coef[b_vlc_intra][i_code].i_level;
1080 RemoveBits( &p_vpar->bit_stream, i_length );
1085 i_run = GetBits( &p_vpar->bit_stream, 6 );
1086 i_level = GetBits( &p_vpar->bit_stream, 12 );
1087 i_level = (b_sign = ( i_level > 2047 )) ? 4096 - i_level
1093 p_mb->pf_idct[i_b] = vdec_SparseIDCT;
1094 p_mb->pi_sparse_pos[i_b] = i_coef;
1098 p_mb->pf_idct[i_b] = vdec_IDCT;
1104 b_sign = GetBits( &p_vpar->bit_stream, 1 );
1107 /* Prepare the next block */
1114 /* We have an error in the stream */
1118 /* Determine the position of the block in the frame */
1119 i_pos = pi_scan[p_vpar->picture.b_alternate_scan][i_parse];
1120 i_level = ( i_level *
1121 p_vpar->mb.i_quantizer_scale *
1122 pi_quant[i_pos] ) >> 4;
1123 p_mb->ppi_blocks[i_b][i_pos] = b_sign ? -i_level : i_level;
1126 intf_ErrMsg("vpar error: DCT coeff (intra) is out of bounds\n");
1127 p_vpar->picture.b_error = 1;
1135 /****************************************************************************
1136 * MotionCode : Parse the next motion code
1137 ****************************************************************************/
1138 static int MotionCode( vpar_thread_t * p_vpar )
1141 static lookup_t pl_mv_tab0[8] =
1142 { {-1,0}, {3,3}, {2,2}, {2,2}, {1,1}, {1,1}, {1,1}, {1,1} };
1143 /* Table B-10, motion_code, codes 0000011 ... 000011x */
1144 static lookup_t pl_mv_tab1[8] =
1145 { {-1,0}, {-1,0}, {-1,0}, {7,6}, {6,6}, {5,6}, {4,5}, {4,5} };
1146 /* Table B-10, motion_code, codes 0000001100 ... 000001011x */
1147 static lookup_t pl_mv_tab2[12] = {
1148 {16,9}, {15,9}, {14,9}, {13,9},
1149 {12,9}, {11,9}, {10,8}, {10,8},
1150 {9,8}, {9,8}, {8,8}, {8,8} };
1152 if( GetBits( &p_vpar->bit_stream, 1 ) )
1156 if( (i_code = ShowBits( &p_vpar->bit_stream, 9) ) >= 64 )
1159 RemoveBits( &p_vpar->bit_stream, pl_mv_tab0[i_code].i_length );
1160 return( GetBits( &p_vpar->bit_stream, 1 ) ?
1161 -pl_mv_tab0[i_code].i_value : pl_mv_tab0[i_code].i_value );
1167 RemoveBits( &p_vpar->bit_stream, pl_mv_tab1[i_code].i_length );
1168 return( GetBits( &p_vpar->bit_stream, 1 ) ?
1169 -pl_mv_tab1[i_code].i_value : pl_mv_tab1[i_code].i_value );
1172 if( (i_code -= 12) < 0 )
1174 p_vpar->picture.b_error = 1;
1175 intf_DbgMsg( "vpar debug: Invalid motion_vector code\n" );
1179 RemoveBits( &p_vpar->bit_stream, pl_mv_tab2[i_code].i_length );
1180 return( GetBits( &p_vpar->bit_stream, 1 ) ?
1181 -pl_mv_tab2[i_code].i_value : pl_mv_tab2[i_code].i_value );
1184 /****************************************************************************
1185 * DecodeMotionVector : Decode a motion_vector
1186 ****************************************************************************/
1187 static void DecodeMotionVector( int * pi_prediction, int i_r_size,
1188 int i_motion_code, int i_motion_residual, int i_full_pel )
1190 int i_limit, i_vector;
1192 /* ISO/IEC 13818-1 section 7.6.3.1 */
1193 i_limit = 16 << i_r_size;
1194 i_vector = *pi_prediction >> i_full_pel;
1196 if( i_motion_code > 0 )
1198 i_vector += ((i_motion_code-1) << i_r_size) + i_motion_residual + 1;
1199 if( i_vector >= i_limit )
1200 i_vector -= i_limit + i_limit;
1202 else if( i_motion_code < 0 )
1204 i_vector -= ((-i_motion_code-1) << i_r_size) + i_motion_residual + 1;
1205 if( i_vector < -i_limit )
1206 i_vector += i_limit + i_limit;
1208 *pi_prediction = i_vector << i_full_pel;
1211 /****************************************************************************
1212 * MotionVector : Parse the next motion_vector field
1213 ****************************************************************************/
1214 static void MotionVector( vpar_thread_t * p_vpar,
1215 macroblock_t * p_mb, int i_r,
1216 int i_s, int i_full_pel, int i_structure )
1218 int i_motion_code, i_motion_residual;
1220 int pi_dm_vector[2];
1222 i_r_size = p_vpar->picture.ppi_f_code[i_s][0] - 1;
1223 i_motion_code = MotionCode( p_vpar );
1224 i_motion_residual = (i_r_size != 0 && i_motion_code != 0) ?
1225 GetBits( &p_vpar->bit_stream, i_r_size) : 0;
1226 DecodeMotionVector( &p_vpar->mb.pppi_pmv[i_r][i_s][0], i_r_size,
1227 i_motion_code, i_motion_residual, i_full_pel );
1228 p_mb->pppi_motion_vectors[i_r][i_s][0] = p_vpar->mb.pppi_pmv[i_r][i_s][0];
1230 if( p_vpar->mb.b_dmv )
1232 if( GetBits(&p_vpar->bit_stream, 1) )
1234 pi_dm_vector[0] = GetBits( &p_vpar->bit_stream, 1 ) ? -1 : 1;
1238 pi_dm_vector[0] = 0;
1242 i_r_size = p_vpar->picture.ppi_f_code[i_s][1]-1;
1243 i_motion_code = MotionCode( p_vpar );
1244 i_motion_residual = (i_r_size != 0 && i_motion_code != 0) ?
1245 GetBits( &p_vpar->bit_stream, i_r_size) : 0;
1248 if( (p_vpar->mb.i_mv_format == MOTION_FIELD)
1249 && (i_structure == FRAME_STRUCTURE) )
1251 p_vpar->mb.pppi_pmv[i_r][i_s][1] >>= 1;
1254 DecodeMotionVector( &p_vpar->mb.pppi_pmv[i_r][i_s][1], i_r_size,
1255 i_motion_code, i_motion_residual, i_full_pel );
1257 if( (p_vpar->mb.i_mv_format == MOTION_FIELD)
1258 && (i_structure == FRAME_STRUCTURE) )
1259 p_vpar->mb.pppi_pmv[i_r][i_s][1] <<= 1;
1261 p_mb->pppi_motion_vectors[i_r][i_s][1] = p_vpar->mb.pppi_pmv[i_r][i_s][1];
1263 if( p_vpar->mb.b_dmv )
1265 if( GetBits(&p_vpar->bit_stream, 1) )
1267 pi_dm_vector[1] = GetBits( &p_vpar->bit_stream, 1 ) ? -1 : 1;
1271 pi_dm_vector[1] = 0;
1274 /* Dual Prime Arithmetic (ISO/IEC 13818-2 section 7.6.3.6). */
1276 #define i_mv_x p_mb->pppi_motion_vectors[0][0][0]
1277 if( i_structure == FRAME_STRUCTURE )
1279 #define i_mv_y (p_mb->pppi_motion_vectors[0][0][1] << 1)
1280 if( p_vpar->picture.b_top_field_first )
1282 /* vector for prediction of top field from bottom field */
1283 p_mb->ppi_dmv[0][0] = ((i_mv_x + (i_mv_x > 0)) >> 1) + pi_dm_vector[0];
1284 p_mb->ppi_dmv[0][1] = ((i_mv_y + (i_mv_y > 0)) >> 1) + pi_dm_vector[1] - 1;
1286 /* vector for prediction of bottom field from top field */
1287 p_mb->ppi_dmv[1][0] = ((3*i_mv_x + (i_mv_x > 0)) >> 1) + pi_dm_vector[0];
1288 p_mb->ppi_dmv[1][1] = ((3*i_mv_y + (i_mv_y > 0)) >> 1) + pi_dm_vector[1] + 1;
1292 /* vector for prediction of top field from bottom field */
1293 p_mb->ppi_dmv[0][0] = ((3*i_mv_x + (i_mv_x > 0)) >> 1) + pi_dm_vector[0];
1294 p_mb->ppi_dmv[0][1] = ((3*i_mv_y + (i_mv_y > 0)) >> 1) + pi_dm_vector[1] - 1;
1296 /* vector for prediction of bottom field from top field */
1297 p_mb->ppi_dmv[1][0] = ((i_mv_x + (i_mv_x > 0)) >> 1) + pi_dm_vector[0];
1298 p_mb->ppi_dmv[1][1] = ((i_mv_y + (i_mv_y > 0)) >> 1) + pi_dm_vector[1] + 1;
1304 #define i_mv_y p_mb->pppi_motion_vectors[0][0][1]
1305 /* vector for prediction from field of opposite 'parity' */
1306 p_mb->ppi_dmv[0][0] = ((i_mv_x + (i_mv_x > 0)) >> 1) + pi_dm_vector[0];
1307 p_mb->ppi_dmv[0][1] = ((i_mv_y + (i_mv_y > 0)) >> 1) + pi_dm_vector[1];
1309 /* correct for vertical field shift */
1310 if( p_vpar->picture.i_structure == TOP_FIELD )
1311 p_mb->ppi_dmv[0][1]--;
1313 p_mb->ppi_dmv[0][1]++;
1320 /*****************************************************************************
1321 * DecodeMVMPEG1 : Parse the next MPEG-1 motion vectors
1322 *****************************************************************************/
1323 static void DecodeMVMPEG1( vpar_thread_t * p_vpar,
1324 macroblock_t * p_mb, int i_s, int i_structure )
1326 MotionVector( p_vpar, p_mb, 0, i_s,
1327 p_vpar->picture.pb_full_pel_vector[i_s], i_structure );
1330 /*****************************************************************************
1331 * DecodeMVMPEG2 : Parse the next MPEG-2 motion_vectors field
1332 *****************************************************************************/
1333 static void DecodeMVMPEG2( vpar_thread_t * p_vpar,
1334 macroblock_t * p_mb, int i_s, int i_structure )
1336 if( p_vpar->mb.i_mv_count == 1 )
1338 if( p_vpar->mb.i_mv_format == MOTION_FIELD && !p_vpar->mb.b_dmv )
1340 p_mb->ppi_field_select[0][i_s] = p_mb->ppi_field_select[1][i_s]
1341 = GetBits( &p_vpar->bit_stream, 1 );
1343 MotionVector( p_vpar, p_mb, 0, i_s, 0, i_structure );
1344 p_vpar->mb.pppi_pmv[1][i_s][0] = p_vpar->mb.pppi_pmv[0][i_s][0];
1345 p_vpar->mb.pppi_pmv[1][i_s][1] = p_vpar->mb.pppi_pmv[0][i_s][1];
1346 p_mb->pppi_motion_vectors[1][i_s][0] = p_vpar->mb.pppi_pmv[0][i_s][0];
1347 p_mb->pppi_motion_vectors[1][i_s][1] = p_vpar->mb.pppi_pmv[0][i_s][1];
1351 p_mb->ppi_field_select[0][i_s] = GetBits( &p_vpar->bit_stream, 1 );
1352 MotionVector( p_vpar, p_mb, 0, i_s, 0, i_structure );
1353 p_mb->ppi_field_select[1][i_s] = GetBits( &p_vpar->bit_stream, 1 );
1354 MotionVector( p_vpar, p_mb, 1, i_s, 0, i_structure );
1360 * Macroblock information structures
1363 /*****************************************************************************
1364 * MacroblockAddressIncrement : Get the macroblock_address_increment field
1365 *****************************************************************************/
1366 static int MacroblockAddressIncrement( vpar_thread_t * p_vpar )
1369 /* Index in the lookup table mb_addr_inc */
1370 int i_index = ShowBits( &p_vpar->bit_stream, 11 );
1372 /* Test the presence of the escape character */
1373 while( i_index == 8 )
1375 RemoveBits( &p_vpar->bit_stream, 11 );
1377 i_index = ShowBits( &p_vpar->bit_stream, 11 );
1380 /* Affect the value from the lookup table */
1381 i_addr_inc += p_vpar->pl_mb_addr_inc[i_index].i_value;
1383 /* Dump the good number of bits */
1384 RemoveBits( &p_vpar->bit_stream, p_vpar->pl_mb_addr_inc[i_index].i_length );
1389 /*****************************************************************************
1390 * IMBType : macroblock_type in I pictures
1391 *****************************************************************************/
1392 static int IMBType( vpar_thread_t * p_vpar )
1394 /* Take two bits for testing */
1395 int i_type = ShowBits( &p_vpar->bit_stream, 2 );
1397 /* Lookup table for macroblock_type */
1398 static lookup_t pl_mb_Itype[4] = { {MB_ERROR, 0},
1399 {MB_QUANT|MB_INTRA, 2},
1402 /* Dump the good number of bits */
1403 RemoveBits( &p_vpar->bit_stream, pl_mb_Itype[i_type].i_length );
1404 return pl_mb_Itype[i_type].i_value;
1407 /*****************************************************************************
1408 * PMBType : macroblock_type in P pictures
1409 *****************************************************************************/
1410 static int PMBType( vpar_thread_t * p_vpar )
1412 /* Testing on 6 bits */
1413 int i_type = ShowBits( &p_vpar->bit_stream, 6 );
1415 /* Dump the good number of bits */
1416 RemoveBits( &p_vpar->bit_stream, p_vpar->ppl_mb_type[0][i_type].i_length );
1417 /* return the value from the lookup table for P type */
1418 return p_vpar->ppl_mb_type[0][i_type].i_value;
1421 /*****************************************************************************
1422 * BMBType : macroblock_type in B pictures
1423 *****************************************************************************/
1424 static int BMBType( vpar_thread_t * p_vpar )
1426 /* Testing on 6 bits */
1427 int i_type = ShowBits( &p_vpar->bit_stream, 6 );
1429 /* Dump the good number of bits */
1430 RemoveBits( &p_vpar->bit_stream, p_vpar->ppl_mb_type[1][i_type].i_length );
1432 /* return the value from the lookup table for B type */
1433 return p_vpar->ppl_mb_type[1][i_type].i_value;
1436 /*****************************************************************************
1437 * DMBType : macroblock_type in D pictures
1438 *****************************************************************************/
1439 static int DMBType( vpar_thread_t * p_vpar )
1441 return GetBits( &p_vpar->bit_stream, 1 );
1444 /*****************************************************************************
1445 * CodedPattern420 : coded_block_pattern with 4:2:0 chroma
1446 *****************************************************************************/
1447 static int CodedPattern420( vpar_thread_t * p_vpar )
1449 /* Take the max 9 bits length vlc code for testing */
1450 int i_vlc = ShowBits( &p_vpar->bit_stream, 9 );
1452 /* Trash the good number of bits read in the lookup table */
1453 RemoveBits( &p_vpar->bit_stream, pl_coded_pattern[i_vlc].i_length );
1455 /* return the value from the vlc table */
1456 return pl_coded_pattern[i_vlc].i_value;
1459 /*****************************************************************************
1460 * CodedPattern422 : coded_block_pattern with 4:2:2 chroma
1461 *****************************************************************************/
1462 static int CodedPattern422( vpar_thread_t * p_vpar )
1464 int i_vlc = ShowBits( &p_vpar->bit_stream, 9 );
1466 RemoveBits( &p_vpar->bit_stream, pl_coded_pattern[i_vlc].i_length );
1468 /* Supplementary 2 bits long code for 4:2:2 format */
1469 return pl_coded_pattern[i_vlc].i_value |
1470 (GetBits( &p_vpar->bit_stream, 2 ) << 6);
1473 /*****************************************************************************
1474 * CodedPattern444 : coded_block_pattern with 4:4:4 chroma
1475 *****************************************************************************/
1476 static int CodedPattern444( vpar_thread_t * p_vpar )
1478 int i_vlc = ShowBits( &p_vpar->bit_stream, 9 );
1480 RemoveBits( &p_vpar->bit_stream, pl_coded_pattern[i_vlc].i_length );
1482 return pl_coded_pattern[i_vlc].i_value |
1483 (GetBits( &p_vpar->bit_stream, 6 ) << 6);
1486 /*****************************************************************************
1487 * InitMacroblock : Initialize macroblock values
1488 *****************************************************************************/
1489 static void InitMacroblock( vpar_thread_t * p_vpar,
1490 macroblock_t * p_mb, int i_coding_type,
1491 int i_chroma_format,
1493 boolean_t b_second_field )
1495 p_mb->i_chroma_nb_blocks = 1 << i_chroma_format;
1496 p_mb->p_picture = p_vpar->picture.p_picture;
1498 if( i_coding_type == B_CODING_TYPE )
1499 p_mb->p_backward = p_vpar->sequence.p_backward;
1501 p_mb->p_backward = NULL;
1502 if( (i_coding_type == P_CODING_TYPE) || (i_coding_type == B_CODING_TYPE) )
1503 p_mb->p_forward = p_vpar->sequence.p_forward;
1505 p_mb->p_forward = NULL;
1507 p_mb->i_l_x = p_vpar->mb.i_l_x;
1508 p_mb->i_c_x = p_vpar->mb.i_c_x;
1509 p_mb->i_motion_l_y = p_vpar->mb.i_l_y;
1510 p_mb->i_motion_c_y = p_vpar->mb.i_c_y;
1511 if( (p_mb->b_motion_field = (i_structure == BOTTOM_FIELD)) )
1513 p_mb->i_motion_l_y--;
1514 p_mb->i_motion_c_y--;
1516 p_mb->i_addb_l_stride = (p_mb->i_l_stride = p_vpar->picture.i_l_stride) - 8;
1517 p_mb->i_addb_c_stride = (p_mb->i_c_stride = p_vpar->picture.i_c_stride) - 8;
1518 p_mb->b_P_second = ( b_second_field && i_coding_type == P_CODING_TYPE );
1521 /*****************************************************************************
1522 * UpdateContext : Update the p_vpar contextual values
1523 *****************************************************************************/
1524 static void UpdateContext( vpar_thread_t * p_vpar, int i_structure )
1526 /* Update macroblock real position. */
1527 p_vpar->mb.i_l_x += 16;
1528 p_vpar->mb.i_l_y += (p_vpar->mb.i_l_x / p_vpar->sequence.i_width)
1529 * (2 - (i_structure == FRAME_STRUCTURE)) * 16;
1530 p_vpar->mb.i_l_x %= p_vpar->sequence.i_width;
1532 p_vpar->mb.i_c_x += p_vpar->sequence.i_chroma_mb_width;
1533 p_vpar->mb.i_c_y += (p_vpar->mb.i_c_x / p_vpar->sequence.i_chroma_width)
1534 * (2 - (i_structure == FRAME_STRUCTURE))
1535 * p_vpar->sequence.i_chroma_mb_height;
1536 p_vpar->mb.i_c_x %= p_vpar->sequence.i_chroma_width;
1539 /*****************************************************************************
1540 * SkippedMacroblock : Generate a skipped macroblock with NULL motion vector
1541 *****************************************************************************/
1542 static void SkippedMacroblock( vpar_thread_t * p_vpar, int i_mb,
1543 int i_mb_base, int i_coding_type,
1544 int i_chroma_format,
1546 boolean_t b_second_field )
1548 macroblock_t * p_mb;
1550 static f_motion_t pf_motion_skipped[4][4] =
1552 {NULL, NULL, NULL, NULL},
1553 {NULL, vdec_MotionFieldField420, vdec_MotionFieldField420,
1554 vdec_MotionFrameFrame420},
1555 {NULL, vdec_MotionFieldField422, vdec_MotionFieldField422,
1556 vdec_MotionFrameFrame422},
1557 {NULL, vdec_MotionFieldField444, vdec_MotionFieldField444,
1558 vdec_MotionFrameFrame444},
1561 if( i_coding_type == I_CODING_TYPE )
1563 intf_DbgMsg("vpar error: skipped macroblock in I-picture\n");
1564 p_vpar->picture.b_error = 1;
1568 if( (p_mb = vpar_NewMacroblock( &p_vpar->vfifo )) == NULL )
1574 p_vpar->picture.pp_mb[i_mb_base + i_mb] = p_mb;
1577 InitMacroblock( p_vpar, p_mb, i_coding_type, i_chroma_format,
1578 i_structure, b_second_field );
1580 /* Motion type is picture structure. */
1581 p_mb->pf_motion = pf_motion_skipped[i_chroma_format]
1583 p_mb->i_mb_type = MB_MOTION_FORWARD;
1584 p_mb->i_coded_block_pattern = 0;
1585 memset( p_mb->pppi_motion_vectors, 0, 8*sizeof(int) );
1587 /* Set the field we use for motion compensation */
1588 p_mb->ppi_field_select[0][0] = p_mb->ppi_field_select[0][1]
1589 = ( i_structure == BOTTOM_FIELD );
1591 UpdateContext( p_vpar, i_structure );
1594 /* Decode the macroblock NOW ! */
1595 vdec_DecodeMacroblock( p_vpar->pp_vdec[0], p_mb );
1599 /*****************************************************************************
1600 * MacroblockModes : Get the macroblock_modes structure
1601 *****************************************************************************/
1602 static void MacroblockModes( vpar_thread_t * p_vpar,
1603 macroblock_t * p_mb,
1604 int i_chroma_format,
1608 static int ppi_mv_count[2][4] = { {0, 1, 2, 1}, {0, 2, 1, 1} };
1609 static int ppi_mv_format[2][4] = { {0, 1, 1, 1}, {0, 1, 2, 1} };
1611 /* Get macroblock_type. */
1612 switch( i_coding_type )
1615 p_mb->i_mb_type = PMBType( p_vpar );
1618 p_mb->i_mb_type = BMBType( p_vpar );
1621 p_mb->i_mb_type = IMBType( p_vpar );
1624 p_mb->i_mb_type = DMBType( p_vpar );
1627 /* SCALABILITY : warning, we don't know if spatial_temporal_weight_code
1628 * has to be dropped, take care if you use scalable streams. */
1629 /* RemoveBits( &p_vpar->bit_stream, 2 ); */
1631 if( (i_coding_type == P_CODING_TYPE || i_coding_type == B_CODING_TYPE)
1632 && (p_mb->i_mb_type & (MB_MOTION_FORWARD | MB_MOTION_BACKWARD)) )
1634 if( !(i_structure == FRAME_STRUCTURE
1635 && p_vpar->picture.b_frame_pred_frame_dct) )
1637 p_vpar->mb.i_motion_type = GetBits( &p_vpar->bit_stream, 2 );
1641 p_vpar->mb.i_motion_type = MOTION_FRAME;
1645 p_vpar->mb.i_mv_count = ppi_mv_count[i_structure == FRAME_STRUCTURE]
1646 [p_vpar->mb.i_motion_type];
1647 p_vpar->mb.i_mv_format = ppi_mv_format[i_structure == FRAME_STRUCTURE]
1648 [p_vpar->mb.i_motion_type];
1649 p_vpar->mb.b_dmv = p_vpar->mb.i_motion_type == MOTION_DMV;
1652 p_vpar->mb.b_dct_type = 0;
1653 if( (i_structure == FRAME_STRUCTURE) &&
1654 (!p_vpar->picture.b_frame_pred_frame_dct) &&
1655 (p_mb->i_mb_type & (MB_PATTERN|MB_INTRA)) )
1657 if( (p_vpar->mb.b_dct_type = GetBits( &p_vpar->bit_stream, 1 )) )
1659 /* The DCT is coded on fields. Jump one line between each
1661 p_mb->i_addb_l_stride <<= 1;
1662 p_mb->i_addb_l_stride += 8;
1663 /* With CHROMA_420, the DCT is necessarily frame-coded. */
1664 if( i_chroma_format != CHROMA_420 )
1666 p_mb->i_addb_c_stride <<= 1;
1667 p_mb->i_addb_c_stride += 8;
1673 /*****************************************************************************
1674 * ParseMacroblock : Parse the next macroblock
1675 *****************************************************************************/
1676 #define PARSEERROR \
1677 if( p_vpar->picture.b_error ) \
1679 /* Mark this block as skipped (better than green blocks), and \
1680 * go to the next slice. */ \
1681 (*pi_mb_address)--; \
1682 vpar_DestroyMacroblock( &p_vpar->vfifo, p_mb ); \
1687 #define PARSEBLOCKS( MPEG1FUNC, MPEG2FUNC ) \
1689 i_mask = 1 << (3 + (1 << i_chroma_format)); \
1692 p_data1 = p_mb->p_picture->p_y \
1693 + p_mb->i_l_x + p_vpar->mb.i_l_y*(p_vpar->sequence.i_width); \
1695 for( i_b = 0 ; i_b < 4 ; i_b++, i_mask >>= 1 ) \
1697 if( p_mb->i_coded_block_pattern & i_mask ) \
1699 memset( p_mb->ppi_blocks[i_b], 0, 64*sizeof(dctelem_t) ); \
1701 MPEG2FUNC( p_vpar, p_mb, i_b, i_chroma_format ); \
1703 MPEG1FUNC( p_vpar, p_mb, i_b, i_chroma_format ); \
1705 /* Calculate block coordinates. */ \
1706 p_mb->p_data[i_b] = p_data1 \
1707 + pi_y[p_vpar->mb.b_dct_type][i_b] \
1708 * p_vpar->sequence.i_width \
1716 p_data1 = p_mb->p_picture->p_u \
1718 + p_vpar->mb.i_c_y \
1719 * (p_vpar->sequence.i_chroma_width); \
1720 p_data2 = p_mb->p_picture->p_v \
1722 + p_vpar->mb.i_c_y \
1723 * (p_vpar->sequence.i_chroma_width); \
1725 for( i_b = 4; i_b < 4 + (1 << i_chroma_format); \
1726 i_b++, i_mask >>= 1 ) \
1728 yuv_data_t * pp_data[2] = {p_data1, p_data2}; \
1730 if( p_mb->i_coded_block_pattern & i_mask ) \
1732 memset( p_mb->ppi_blocks[i_b], 0, 64*sizeof(dctelem_t) ); \
1734 MPEG2FUNC( p_vpar, p_mb, i_b, i_chroma_format ); \
1736 MPEG1FUNC( p_vpar, p_mb, i_b, i_chroma_format ); \
1738 /* Calculate block coordinates. */ \
1739 p_mb->p_data[i_b] = pp_data[i_b & 1] \
1740 + pi_y[p_vpar->mb.b_dct_type][i_b] \
1741 * p_vpar->sequence.i_chroma_width \
1749 static void ParseMacroblock(
1750 vpar_thread_t * p_vpar,
1751 int * pi_mb_address, /* previous address to be
1752 * used for mb_addr_incr */
1753 int i_mb_previous, /* actual previous mb */
1754 int i_mb_base, /* non-zero if field structure */
1755 /* The following parameters are explicit in
1756 * optimized routines : */
1757 boolean_t b_mpeg2, /* you know what ? */
1758 int i_coding_type, /* I, P, B or D */
1759 int i_chroma_format, /* 4:2:0, 4:2:2 or 4:4:4 */
1760 int i_structure, /* T(OP), B(OTTOM) or F(RAME) */
1761 boolean_t b_second_field ) /* second field of a
1764 static f_motion_t pppf_motion[4][2][4] =
1766 { {NULL, NULL, NULL, NULL},
1767 {NULL, NULL, NULL, NULL}
1769 { {NULL, vdec_MotionFieldField420, vdec_MotionField16x8420,
1770 vdec_MotionFieldDMV420},
1771 {NULL, vdec_MotionFrameField420, vdec_MotionFrameFrame420,
1772 vdec_MotionFrameDMV420}
1774 { {NULL, vdec_MotionFieldField422, vdec_MotionField16x8422,
1775 vdec_MotionFieldDMV422},
1776 {NULL, vdec_MotionFrameField422, vdec_MotionFrameFrame422,
1777 vdec_MotionFrameDMV422}
1779 { {NULL, vdec_MotionFieldField444, vdec_MotionField16x8444,
1780 vdec_MotionFieldDMV444},
1781 {NULL, vdec_MotionFrameField444, vdec_MotionFrameFrame444,
1782 vdec_MotionFrameDMV444}
1785 static int pi_x[12] = {0,8,0,8,0,0,0,0,8,8,8,8};
1786 static int pi_y[2][12] = { {0,0,8,8,0,0,8,8,0,0,8,8},
1787 {0,0,1,1,0,0,1,1,0,0,1,1} };
1788 int i_mb, i_b, i_mask;
1790 macroblock_t * p_mb;
1791 yuv_data_t * p_data1;
1792 yuv_data_t * p_data2;
1796 i_inc = MacroblockAddressIncrement( p_vpar );
1797 *pi_mb_address += i_inc;
1801 intf_ErrMsg( "vpar error: bad address increment (%d)\n", i_inc );
1802 p_vpar->picture.b_error = 1;
1806 if( *pi_mb_address - i_mb_previous - 1 )
1808 /* Skipped macroblock (ISO/IEC 13818-2 7.6.6). */
1810 /* Reset DC predictors (7.2.1). */
1811 p_vpar->mb.pi_dc_dct_pred[0] = p_vpar->mb.pi_dc_dct_pred[1]
1812 = p_vpar->mb.pi_dc_dct_pred[2]
1813 = 1 << (7 + p_vpar->picture.i_intra_dc_precision);
1815 if( i_coding_type == P_CODING_TYPE )
1817 /* Reset motion vector predictors (ISO/IEC 13818-2 7.6.3.4). */
1818 memset( p_vpar->mb.pppi_pmv, 0, 8*sizeof(int) );
1821 for( i_mb = i_mb_previous + 1; i_mb < *pi_mb_address; i_mb++ )
1823 SkippedMacroblock( p_vpar, i_mb, i_mb_base, i_coding_type,
1824 i_chroma_format, i_structure, b_second_field );
1828 /* Get a macroblock structure. */
1829 if( (p_mb = vpar_NewMacroblock( &p_vpar->vfifo )) == NULL )
1835 p_vpar->picture.pp_mb[i_mb_base + *pi_mb_address] = p_mb;
1838 InitMacroblock( p_vpar, p_mb, i_coding_type, i_chroma_format,
1839 i_structure, b_second_field );
1841 /* Parse off macroblock_modes structure. */
1842 MacroblockModes( p_vpar, p_mb, i_chroma_format, i_coding_type,
1845 if( p_mb->i_mb_type & MB_QUANT )
1847 LoadQuantizerScale( p_vpar );
1850 if( (i_coding_type == P_CODING_TYPE || i_coding_type == B_CODING_TYPE)
1851 && (p_mb->i_mb_type & MB_MOTION_FORWARD) )
1854 DecodeMVMPEG2( p_vpar, p_mb, 0, i_structure );
1856 DecodeMVMPEG1( p_vpar, p_mb, 0, i_structure );
1860 if( (i_coding_type == B_CODING_TYPE)
1861 && (p_mb->i_mb_type & MB_MOTION_BACKWARD) )
1864 DecodeMVMPEG2( p_vpar, p_mb, 1, i_structure );
1866 DecodeMVMPEG1( p_vpar, p_mb, 1, i_structure );
1870 if( i_coding_type == P_CODING_TYPE
1871 && !(p_mb->i_mb_type & (MB_MOTION_FORWARD|MB_INTRA)) )
1873 /* Special No-MC macroblock in P pictures (7.6.3.5). */
1874 p_mb->i_mb_type |= MB_MOTION_FORWARD;
1875 memset( p_vpar->mb.pppi_pmv, 0, 8*sizeof(int) );
1876 memset( p_mb->pppi_motion_vectors, 0, 8*sizeof(int) );
1877 p_vpar->mb.i_motion_type = 1 + (i_structure == FRAME_STRUCTURE);
1878 p_mb->ppi_field_select[0][0] = (i_structure == BOTTOM_FIELD);
1881 if( (i_coding_type != I_CODING_TYPE) && !(p_mb->i_mb_type & MB_INTRA) )
1883 /* Reset DC predictors (7.2.1). */
1884 p_vpar->mb.pi_dc_dct_pred[0] = p_vpar->mb.pi_dc_dct_pred[1]
1885 = p_vpar->mb.pi_dc_dct_pred[2]
1886 = 1 << (7 + p_vpar->picture.i_intra_dc_precision);
1888 /* Motion function pointer. */
1889 p_mb->pf_motion = pppf_motion[i_chroma_format]
1890 [i_structure == FRAME_STRUCTURE]
1891 [p_vpar->mb.i_motion_type];
1893 if( p_mb->i_mb_type & MB_PATTERN )
1895 switch( i_chroma_format )
1898 p_mb->i_coded_block_pattern = CodedPattern420( p_vpar );
1901 p_mb->i_coded_block_pattern = CodedPattern422( p_vpar );
1904 p_mb->i_coded_block_pattern = CodedPattern444( p_vpar );
1909 p_mb->i_coded_block_pattern = 0;
1913 * Effectively decode blocks.
1915 PARSEBLOCKS( DecodeMPEG1NonIntra, DecodeMPEG2NonIntra )
1919 if( !p_vpar->picture.b_concealment_mv )
1921 /* Reset MV predictors. */
1922 memset( p_vpar->mb.pppi_pmv, 0, 8*sizeof(int) );
1927 DecodeMVMPEG2( p_vpar, p_mb, 0, i_structure );
1929 DecodeMVMPEG1( p_vpar, p_mb, 0, i_structure );
1930 RemoveBits( &p_vpar->bit_stream, 1 );
1933 if( p_mb->i_mb_type & MB_PATTERN )
1935 switch( i_chroma_format )
1938 p_mb->i_coded_block_pattern = CodedPattern420( p_vpar );
1941 p_mb->i_coded_block_pattern = CodedPattern422( p_vpar );
1944 p_mb->i_coded_block_pattern = CodedPattern444( p_vpar );
1949 p_mb->i_coded_block_pattern =
1950 (1 << (4 + (1 << i_chroma_format))) - 1;
1954 * Effectively decode blocks.
1956 PARSEBLOCKS( DecodeMPEG1Intra, DecodeMPEG2Intra )
1959 if( !p_vpar->picture.b_error )
1961 UpdateContext( p_vpar, i_structure );
1963 /* Decode the macroblock NOW ! */
1964 vdec_DecodeMacroblock( p_vpar->pp_vdec[0], p_mb );
1969 /* Mark this block as skipped (better than green blocks), and go
1970 * to the next slice. */
1972 vpar_DestroyMacroblock( &p_vpar->vfifo, p_mb );
1977 * Picture data parsing management
1980 /*****************************************************************************
1981 * SliceHeader : Parse the next slice structure
1982 *****************************************************************************/
1983 static void SliceHeader( vpar_thread_t * p_vpar,
1984 int * pi_mb_address, int i_mb_base,
1985 u32 i_vert_code, boolean_t b_high,
1986 boolean_t b_dp_scalable,
1987 boolean_t b_mpeg2, int i_coding_type,
1988 int i_chroma_format, int i_structure,
1989 boolean_t b_second_field )
1991 int i_mb_address_save = *pi_mb_address;
1993 p_vpar->picture.b_error = 0;
1997 /* Picture with more than 2800 lines. */
1998 i_vert_code += GetBits( &p_vpar->bit_stream, 3 ) << 7;
2002 /* DATA_PARTITIONING scalability. */
2003 RemoveBits( &p_vpar->bit_stream, 7 ); /* priority_breakpoint */
2006 LoadQuantizerScale( p_vpar );
2008 if( GetBits( &p_vpar->bit_stream, 1 ) )
2010 /* intra_slice, slice_id */
2011 RemoveBits( &p_vpar->bit_stream, 8 );
2012 /* extra_information_slice */
2013 while( GetBits( &p_vpar->bit_stream, 1 ) )
2015 RemoveBits( &p_vpar->bit_stream, 8 );
2018 *pi_mb_address = (i_vert_code - 1)*p_vpar->sequence.i_mb_width;
2020 if( *pi_mb_address < i_mb_address_save )
2022 intf_ErrMsg( "vpar error: slices do not follow, maybe a PES has been trashed\n" );
2023 p_vpar->picture.b_error = 1;
2027 /* Reset DC coefficients predictors (ISO/IEC 13818-2 7.2.1). */
2028 p_vpar->mb.pi_dc_dct_pred[0] = p_vpar->mb.pi_dc_dct_pred[1]
2029 = p_vpar->mb.pi_dc_dct_pred[2]
2030 = 1 << (7 + p_vpar->picture.i_intra_dc_precision);
2032 /* Reset motion vector predictors (ISO/IEC 13818-2 7.6.3.4). */
2033 memset( p_vpar->mb.pppi_pmv, 0, 8*sizeof(int) );
2037 if( i_mb_address_save >= p_vpar->sequence.i_mb_size )
2039 p_vpar->picture.b_error = 1;
2042 ParseMacroblock( p_vpar, pi_mb_address, i_mb_address_save,
2043 i_mb_base, b_mpeg2, i_coding_type,
2044 i_chroma_format, i_structure,
2046 i_mb_address_save = *pi_mb_address;
2047 if( p_vpar->picture.b_error )
2052 while( ShowBits( &p_vpar->bit_stream, 23 ) && !p_vpar->b_die );
2053 NextStartCode( p_vpar );
2056 /*****************************************************************************
2057 * PictureData : Parse off all macroblocks (ISO/IEC 13818-2 6.2.3.7)
2058 *****************************************************************************/
2059 static void PictureData( vpar_thread_t * p_vpar, int i_mb_base,
2060 boolean_t b_high, boolean_t b_dp_scalable,
2061 boolean_t b_mpeg2, int i_coding_type,
2062 int i_chroma_format, int i_structure,
2063 boolean_t b_second_field )
2065 int i_mb_address = 0;
2068 NextStartCode( p_vpar );
2069 while( ((i_coding_type != I_CODING_TYPE && i_coding_type != D_CODING_TYPE)
2070 || !p_vpar->picture.b_error)
2071 && i_mb_address+i_mb_base < p_vpar->sequence.i_mb_size
2074 if( ((i_dummy = ShowBits( &p_vpar->bit_stream, 32 ))
2075 < SLICE_START_CODE_MIN) ||
2076 (i_dummy > SLICE_START_CODE_MAX) )
2078 intf_DbgMsg("vpar debug: premature end of picture\n");
2079 p_vpar->picture.b_error = 1;
2082 RemoveBits32( &p_vpar->bit_stream );
2084 /* Decode slice data. */
2085 SliceHeader( p_vpar, &i_mb_address, i_mb_base, i_dummy & 255,
2086 b_high, b_dp_scalable, b_mpeg2, i_coding_type,
2087 i_chroma_format, i_structure, b_second_field );
2090 /* Try to recover from error. If we missed less than half the
2091 * number of macroblocks of the picture, mark the missed ones
2093 if( (i_coding_type == P_CODING_TYPE || i_coding_type == B_CODING_TYPE)
2094 && p_vpar->picture.b_error &&
2095 ( (i_mb_address-i_mb_base) > (p_vpar->sequence.i_mb_size >> 1)
2096 || (i_structure != FRAME_STRUCTURE
2097 && (i_mb_address-i_mb_base) > (p_vpar->sequence.i_mb_size >> 2) ) ) )
2101 p_vpar->picture.b_error = 0;
2102 for( i_mb = i_mb_address + 1;
2103 i_mb < (p_vpar->sequence.i_mb_size
2104 << (i_structure != FRAME_STRUCTURE));
2107 SkippedMacroblock( p_vpar, i_mb, i_mb_base, i_coding_type,
2108 i_chroma_format, i_structure, b_second_field );
2113 /*****************************************************************************
2114 * vpar_PictureDataVWXYZ : Parse the next macroblock ; specific functions
2115 *****************************************************************************
2118 * X = chroma format ?
2120 * Z = second field ?
2121 *****************************************************************************/
2122 void vpar_PictureDataGENERIC( vpar_thread_t * p_vpar, int i_mb_base )
2124 PictureData( p_vpar, i_mb_base, (p_vpar->sequence.i_height > 2800),
2125 (p_vpar->sequence.i_scalable_mode == SC_DP),
2126 p_vpar->sequence.b_mpeg2, p_vpar->picture.i_coding_type,
2127 p_vpar->sequence.i_chroma_format,
2128 p_vpar->picture.i_structure,
2129 (p_vpar->picture.i_structure !=
2130 p_vpar->picture.i_current_structure) );
2133 #if (VPAR_OPTIM_LEVEL > 0)
2134 /* Optimizations for frame pictures */
2135 void vpar_PictureData2I420F0( vpar_thread_t * p_vpar, int i_mb_base )
2137 PictureData( p_vpar, 0, 0, 0, 1, I_CODING_TYPE, CHROMA_420,
2138 FRAME_STRUCTURE, 0 );
2141 void vpar_PictureData2P420F0( vpar_thread_t * p_vpar, int i_mb_base )
2143 PictureData( p_vpar, 0, 0, 0, 1, P_CODING_TYPE, CHROMA_420,
2144 FRAME_STRUCTURE, 0 );
2147 void vpar_PictureData2B420F0( vpar_thread_t * p_vpar, int i_mb_base )
2149 PictureData( p_vpar, 0, 0, 0, 1, B_CODING_TYPE, CHROMA_420,
2150 FRAME_STRUCTURE, 0 );
2154 #if (VPAR_OPTIM_LEVEL > 1)
2155 /* Optimizations for field pictures */
2156 void vpar_PictureData2I420TZ( vpar_thread_t * p_vpar, int i_mb_base )
2158 PictureData( p_vpar, i_mb_base, 0, 0, 1, I_CODING_TYPE, CHROMA_420,
2159 TOP_FIELD, (p_vpar->picture.i_structure !=
2160 p_vpar->picture.i_current_structure) );
2163 void vpar_PictureData2P420TZ( vpar_thread_t * p_vpar, int i_mb_base )
2165 PictureData( p_vpar, i_mb_base, 0, 0, 1, P_CODING_TYPE, CHROMA_420,
2166 TOP_FIELD, (p_vpar->picture.i_structure !=
2167 p_vpar->picture.i_current_structure) );
2170 void vpar_PictureData2B420TZ( vpar_thread_t * p_vpar, int i_mb_base )
2172 PictureData( p_vpar, i_mb_base, 0, 0, 1, B_CODING_TYPE, CHROMA_420,
2173 TOP_FIELD, (p_vpar->picture.i_structure !=
2174 p_vpar->picture.i_current_structure) );
2177 void vpar_PictureData2I420BZ( vpar_thread_t * p_vpar, int i_mb_base )
2179 PictureData( p_vpar, i_mb_base, 0, 0, 1, I_CODING_TYPE, CHROMA_420,
2180 BOTTOM_FIELD, (p_vpar->picture.i_structure !=
2181 p_vpar->picture.i_current_structure) );
2184 void vpar_PictureData2P420BZ( vpar_thread_t * p_vpar, int i_mb_base )
2186 PictureData( p_vpar, i_mb_base, 0, 0, 1, P_CODING_TYPE, CHROMA_420,
2187 BOTTOM_FIELD, (p_vpar->picture.i_structure !=
2188 p_vpar->picture.i_current_structure) );
2191 void vpar_PictureData2B420BZ( vpar_thread_t * p_vpar, int i_mb_base )
2193 PictureData( p_vpar, i_mb_base, 0, 0, 1, B_CODING_TYPE, CHROMA_420,
2194 BOTTOM_FIELD, (p_vpar->picture.i_structure !=
2195 p_vpar->picture.i_current_structure) );