1 /*****************************************************************************
2 * vpar_blocks.c : blocks parsing
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
5 * $Id: vpar_blocks.c,v 1.71 2001/01/17 18:17:31 massiot Exp $
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
8 * Jean-Marc Dressler <polux@via.ecp.fr>
9 * Stéphane Borel <stef@via.ecp.fr>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
24 *****************************************************************************/
26 /*****************************************************************************
28 *****************************************************************************/
31 #include <string.h> /* memset */
41 #include "stream_control.h"
42 #include "input_ext-dec.h"
45 #include "video_output.h"
47 #include "video_decoder.h"
48 #include "../video_decoder/vdec_idct.h"
49 #include "../video_decoder/vdec_motion.h"
51 #include "../video_decoder/vpar_blocks.h"
52 #include "../video_decoder/vpar_headers.h"
53 #include "../video_decoder/vpar_synchro.h"
54 #include "../video_decoder/video_parser.h"
55 #include "../video_decoder/video_fifo.h"
58 * Welcome to vpar_blocks.c ! Here's where the heavy processor-critical parsing
59 * task is done. This file is divided in several parts :
60 * - Initialization of the lookup tables
61 * - Decoding of coded blocks
62 * - Decoding of motion vectors
63 * - Decoding of the other macroblock structures
64 * - Picture data parsing management (slices and error handling)
65 * It's a pretty long file. Good luck and have a nice day.
70 * Initialization tables
73 /* Table for coded_block_pattern resolution */
74 static lookup_t pl_coded_pattern[512] =
75 { {MB_ERROR, 0}, {0, 9}, {39, 9}, {27, 9}, {59, 9}, {55, 9}, {47, 9}, {31, 9},
76 {58, 8}, {58, 8}, {54, 8}, {54, 8}, {46, 8}, {46, 8}, {30, 8}, {30, 8},
77 {57, 8}, {57, 8}, {53, 8}, {53, 8}, {45, 8}, {45, 8}, {29, 8}, {29, 8},
78 {38, 8}, {38, 8}, {26, 8}, {26, 8}, {37, 8}, {37, 8}, {25, 8}, {25, 8},
79 {43, 8}, {43, 8}, {23, 8}, {23, 8}, {51, 8}, {51, 8}, {15, 8}, {15, 8},
80 {42, 8}, {42, 8}, {22, 8}, {22, 8}, {50, 8}, {50, 8}, {14, 8}, {14, 8},
81 {41, 8}, {41, 8}, {21, 8}, {21, 8}, {49, 8}, {49, 8}, {13, 8}, {13, 8},
82 {35, 8}, {35, 8}, {19, 8}, {19, 8}, {11, 8}, {11, 8}, {7, 8}, {7, 8},
83 {34, 7}, {34, 7}, {34, 7}, {34, 7}, {18, 7}, {18, 7}, {18, 7}, {18, 7},
84 {10, 7}, {10, 7}, {10, 7}, {10, 7}, {6, 7}, {6, 7}, {6, 7}, {6, 7},
85 {33, 7}, {33, 7}, {33, 7}, {33, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7},
86 {9, 7}, {9, 7}, {9, 7}, {9, 7}, {5, 7}, {5, 7}, {5, 7}, {5, 7},
87 {63, 6}, {63, 6}, {63, 6}, {63, 6}, {63, 6}, {63, 6}, {63, 6}, {63, 6},
88 {3, 6}, {3, 6}, {3, 6}, {3, 6}, {3, 6}, {3, 6}, {3, 6}, {3, 6},
89 {36, 6}, {36, 6}, {36, 6}, {36, 6}, {36, 6}, {36, 6}, {36, 6}, {36, 6},
90 {24, 6}, {24, 6}, {24, 6}, {24, 6}, {24, 6}, {24, 6}, {24, 6}, {24, 6},
91 {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5},
92 {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5}, {62, 5},
93 {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5},
94 {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5}, {2, 5},
95 {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5},
96 {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5}, {61, 5},
97 {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5},
98 {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5}, {1, 5},
99 {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5},
100 {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5}, {56, 5},
101 {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5},
102 {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5}, {52, 5},
103 {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5},
104 {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5}, {44, 5},
105 {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5},
106 {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5}, {28, 5},
107 {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5},
108 {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5}, {40, 5},
109 {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5},
110 {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5}, {20, 5},
111 {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5},
112 {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5}, {48, 5},
113 {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5},
114 {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5},
115 {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
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 {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 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 {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 4}, {8, 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 {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 4}, {4, 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 {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3}, {60, 3},
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} };
140 /* Tables for dc DCT coefficients
141 * Tables are cut in two parts to reduce memory occupation
144 /* Table B-12, dct_dc_size_luminance, codes 00XXX ... 11110 */
146 static lookup_t pl_dct_dc_lum_init_table_1[32] =
147 { {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
148 {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
149 {0, 3}, {0, 3}, {0, 3}, {0, 3}, {3, 3}, {3, 3}, {3, 3}, {3, 3},
150 {4, 3}, {4, 3}, {4, 3}, {4, 3}, {5, 4}, {5, 4}, {6, 5}, {MB_ERROR, 0}
153 static lookup_t ppl_dct_dc_init_table_1[2][32] =
154 { { {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
155 {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
156 {0, 3}, {0, 3}, {0, 3}, {0, 3}, {3, 3}, {3, 3}, {3, 3}, {3, 3},
157 {4, 3}, {4, 3}, {4, 3}, {4, 3}, {5, 4}, {5, 4}, {6, 5}, {MB_ERROR, 0}},
158 { {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2},
159 {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
160 {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
161 {3, 3}, {3, 3}, {3, 3}, {3, 3}, {4, 4}, {4, 4}, {5, 5}, {MB_ERROR, 0}
165 /* Table B-12, dct_dc_size_luminance, codes 111110xxx ... 111111111 */
167 static lookup_t pl_dct_dc_lum_init_table_2[32] =
168 { {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6},
169 {8, 7}, {8, 7}, {8, 7}, {8, 7}, {9, 8}, {9, 8}, {10,9}, {11,9},
170 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0},
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}
176 static lookup_t ppl_dct_dc_init_table_2[2][32] =
177 { { {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6},
178 {8, 7}, {8, 7}, {8, 7}, {8, 7}, {9, 8}, {9, 8}, {10,9}, {11,9},
179 {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0}, {MB_ERROR, 0},
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 { {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
184 {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
185 {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7},
186 {8, 8}, {8, 8}, {8, 8}, {8, 8}, {9, 9}, {9, 9}, {10,10}, {11,10}
190 /* Table B-13, dct_dc_size_chrominance, codes 00xxx ... 11110 */
191 static lookup_t pl_dct_dc_chrom_init_table_1[32] =
192 { {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2},
193 {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
194 {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
195 {3, 3}, {3, 3}, {3, 3}, {3, 3}, {4, 4}, {4, 4}, {5, 5}, {MB_ERROR, 0}
199 /* Table B-13, dct_dc_size_chrominance, codes 111110xxxx ... 1111111111 */
200 static lookup_t pl_dct_dc_chrom_init_table_2[32] =
201 { {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
202 {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
203 {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7},
204 {8, 8}, {8, 8}, {8, 8}, {8, 8}, {9, 9}, {9, 9}, {10,10}, {11,10}
208 /* Tables for ac DCT coefficients. There are cut in many parts to save space */
209 /* Table B-14, DCT coefficients table zero,
210 * codes 0100 ... 1xxx (used for first (DC) coefficient)
212 static dct_lookup_t pl_DCT_tab_dc[12] =
214 {0,2,4}, {2,1,4}, {1,1,3}, {1,1,3},
215 {0,1,1}, {0,1,1}, {0,1,1}, {0,1,1},
216 {0,1,1}, {0,1,1}, {0,1,1}, {0,1,1}
219 /* Table B-14, DCT coefficients table zero,
220 * codes 0100 ... 1xxx (used for all other coefficients)
222 static dct_lookup_t pl_DCT_tab_ac[12] =
224 {0,2,4}, {2,1,4}, {1,1,3}, {1,1,3},
225 {DCT_EOB,0,2}, {DCT_EOB,0,2}, {DCT_EOB,0,2}, {DCT_EOB,0,2}, /* EOB */
226 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2}
229 /* Table B-14, DCT coefficients table zero,
230 * codes 000001xx ... 00111xxx
232 static dct_lookup_t pl_DCT_tab0[60] =
234 {DCT_ESCAPE,0,6}, {DCT_ESCAPE,0,6}, {DCT_ESCAPE,0,6}, {DCT_ESCAPE,0,6},
236 {2,2,7}, {2,2,7}, {9,1,7}, {9,1,7},
237 {0,4,7}, {0,4,7}, {8,1,7}, {8,1,7},
238 {7,1,6}, {7,1,6}, {7,1,6}, {7,1,6},
239 {6,1,6}, {6,1,6}, {6,1,6}, {6,1,6},
240 {1,2,6}, {1,2,6}, {1,2,6}, {1,2,6},
241 {5,1,6}, {5,1,6}, {5,1,6}, {5,1,6},
242 {13,1,8}, {0,6,8}, {12,1,8}, {11,1,8},
243 {3,2,8}, {1,3,8}, {0,5,8}, {10,1,8},
244 {0,3,5}, {0,3,5}, {0,3,5}, {0,3,5},
245 {0,3,5}, {0,3,5}, {0,3,5}, {0,3,5},
246 {4,1,5}, {4,1,5}, {4,1,5}, {4,1,5},
247 {4,1,5}, {4,1,5}, {4,1,5}, {4,1,5},
248 {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
249 {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5}
252 /* Table B-15, DCT coefficients table one,
253 * codes 000001xx ... 11111111
255 static dct_lookup_t pl_DCT_tab0a[252] =
257 {65,0,6}, {65,0,6}, {65,0,6}, {65,0,6}, /* Escape */
258 {7,1,7}, {7,1,7}, {8,1,7}, {8,1,7},
259 {6,1,7}, {6,1,7}, {2,2,7}, {2,2,7},
260 {0,7,6}, {0,7,6}, {0,7,6}, {0,7,6},
261 {0,6,6}, {0,6,6}, {0,6,6}, {0,6,6},
262 {4,1,6}, {4,1,6}, {4,1,6}, {4,1,6},
263 {5,1,6}, {5,1,6}, {5,1,6}, {5,1,6},
264 {1,5,8}, {11,1,8}, {0,11,8}, {0,10,8},
265 {13,1,8}, {12,1,8}, {3,2,8}, {1,4,8},
266 {2,1,5}, {2,1,5}, {2,1,5}, {2,1,5},
267 {2,1,5}, {2,1,5}, {2,1,5}, {2,1,5},
268 {1,2,5}, {1,2,5}, {1,2,5}, {1,2,5},
269 {1,2,5}, {1,2,5}, {1,2,5}, {1,2,5},
270 {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
271 {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
272 {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
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 {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4}, /* EOB */
281 {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
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 {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
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 {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
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 {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
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 {0,4,5}, {0,4,5}, {0,4,5}, {0,4,5},
313 {0,4,5}, {0,4,5}, {0,4,5}, {0,4,5},
314 {0,5,5}, {0,5,5}, {0,5,5}, {0,5,5},
315 {0,5,5}, {0,5,5}, {0,5,5}, {0,5,5},
316 {9,1,7}, {9,1,7}, {1,3,7}, {1,3,7},
317 {10,1,7}, {10,1,7}, {0,8,7}, {0,8,7},
318 {0,9,7}, {0,9,7}, {0,12,8}, {0,13,8},
319 {2,3,8}, {4,2,8}, {0,14,8}, {0,15,8}
322 /* Table B-14, DCT coefficients table zero,
323 * codes 0000001000 ... 0000001111
325 static dct_lookup_t pl_DCT_tab1[8] =
327 {16,1,10}, {5,2,10}, {0,7,10}, {2,3,10},
328 {1,4,10}, {15,1,10}, {14,1,10}, {4,2,10}
331 /* Table B-15, DCT coefficients table one,
332 * codes 000000100x ... 000000111x
334 static dct_lookup_t pl_DCT_tab1a[8] =
336 {5,2,9}, {5,2,9}, {14,1,9}, {14,1,9},
337 {2,4,10}, {16,1,10}, {15,1,9}, {15,1,9}
340 /* Table B-14/15, DCT coefficients table zero / one,
341 * codes 000000010000 ... 000000011111
343 static dct_lookup_t pl_DCT_tab2[16] =
345 {0,11,12}, {8,2,12}, {4,3,12}, {0,10,12},
346 {2,4,12}, {7,2,12}, {21,1,12}, {20,1,12},
347 {0,9,12}, {19,1,12}, {18,1,12}, {1,5,12},
348 {3,3,12}, {0,8,12}, {6,2,12}, {17,1,12}
351 /* Table B-14/15, DCT coefficients table zero / one,
352 * codes 0000000010000 ... 0000000011111
354 static dct_lookup_t pl_DCT_tab3[16] =
356 {10,2,13}, {9,2,13}, {5,3,13}, {3,4,13},
357 {2,5,13}, {1,7,13}, {1,6,13}, {0,15,13},
358 {0,14,13}, {0,13,13}, {0,12,13}, {26,1,13},
359 {25,1,13}, {24,1,13}, {23,1,13}, {22,1,13}
362 /* Table B-14/15, DCT coefficients table zero / one,
363 * codes 00000000010000 ... 00000000011111
365 static dct_lookup_t pl_DCT_tab4[16] =
367 {0,31,14}, {0,30,14}, {0,29,14}, {0,28,14},
368 {0,27,14}, {0,26,14}, {0,25,14}, {0,24,14},
369 {0,23,14}, {0,22,14}, {0,21,14}, {0,20,14},
370 {0,19,14}, {0,18,14}, {0,17,14}, {0,16,14}
373 /* Table B-14/15, DCT coefficients table zero / one,
374 * codes 000000000010000 ... 000000000011111
376 static dct_lookup_t pl_DCT_tab5[16] =
378 {0,40,15}, {0,39,15}, {0,38,15}, {0,37,15},
379 {0,36,15}, {0,35,15}, {0,34,15}, {0,33,15},
380 {0,32,15}, {1,14,15}, {1,13,15}, {1,12,15},
381 {1,11,15}, {1,10,15}, {1,9,15}, {1,8,15}
384 /* Table B-14/15, DCT coefficients table zero / one,
385 * codes 0000000000010000 ... 0000000000011111
387 static dct_lookup_t pl_DCT_tab6[16] =
389 {1,18,16}, {1,17,16}, {1,16,16}, {1,15,16},
390 {6,3,16}, {16,2,16}, {15,2,16}, {14,2,16},
391 {13,2,16}, {12,2,16}, {11,2,16}, {31,1,16},
392 {30,1,16}, {29,1,16}, {28,1,16}, {27,1,16}
395 /* Pointers on tables of dct coefficients */
396 static dct_lookup_t * ppl_dct_tab1[2] = { pl_DCT_tab_ac, pl_DCT_tab0a };
398 static dct_lookup_t * ppl_dct_tab2[2] = { pl_DCT_tab_ac, pl_DCT_tab_dc };
401 /* Lookup Table for the chromatic component */
402 static int pi_cc_index[12] = { 0, 0, 0, 0, 1, 2, 1, 2, 1, 2 };
406 * Initialization of lookup tables
409 /*****************************************************************************
410 * vpar_InitCrop : Initialize the crop table for saturation
411 * (ISO/IEC 13818-2 section 7.4.3)
412 *****************************************************************************/
413 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
414 void vpar_InitCrop( vpar_thread_t * p_vpar )
418 p_vpar->pi_crop = p_vpar->pi_crop_buf + 4096;
420 for( i_dummy = -4096; i_dummy < -2048; i_dummy++ )
422 p_vpar->pi_crop[i_dummy] = -2048;
424 for( ; i_dummy < 2047; i_dummy++ )
426 p_vpar->pi_crop[i_dummy] = i_dummy;
428 for( ; i_dummy < 4095; i_dummy++ )
430 p_vpar->pi_crop[i_dummy] = 2047;
435 /*****************************************************************************
436 * vpar_InitMbAddrInc : Initialize the lookup table for mb_addr_inc
437 *****************************************************************************/
439 /* Function for filling up the lookup table for mb_addr_inc */
440 static void FillMbAddrIncTable( vpar_thread_t * p_vpar,
441 int i_start, int i_end, int i_step,
442 int * pi_value, int i_length )
445 for( i_pos = i_start ; i_pos < i_end ; i_pos += i_step )
447 for( i_offset = 0 ; i_offset < i_step ; i_offset ++ )
449 p_vpar->pl_mb_addr_inc[i_pos + i_offset].i_value = * pi_value;
450 p_vpar->pl_mb_addr_inc[i_pos + i_offset].i_length = i_length;
456 /* Function that initialize the table using the last one */
457 void vpar_InitMbAddrInc( vpar_thread_t * p_vpar )
462 for( i_dummy = 0 ; i_dummy < 8 ; i_dummy++ )
464 p_vpar->pl_mb_addr_inc[i_dummy].i_value = MB_ERROR;
465 p_vpar->pl_mb_addr_inc[i_dummy].i_length = 0;
468 p_vpar->pl_mb_addr_inc[8].i_value = MB_ADDRINC_ESCAPE;
469 p_vpar->pl_mb_addr_inc[8].i_length = 11;
471 for( i_dummy = 9 ; i_dummy < 15 ; i_dummy ++ )
473 p_vpar->pl_mb_addr_inc[i_dummy].i_value = MB_ERROR;
474 p_vpar->pl_mb_addr_inc[i_dummy].i_length = 0;
477 p_vpar->pl_mb_addr_inc[15].i_value = MB_ADDRINC_STUFFING;
478 p_vpar->pl_mb_addr_inc[15].i_length = 11;
480 for( i_dummy = 16; i_dummy < 24; i_dummy++ )
482 p_vpar->pl_mb_addr_inc[i_dummy].i_value = MB_ERROR;
483 p_vpar->pl_mb_addr_inc[i_dummy].i_length = 0;
488 FillMbAddrIncTable( p_vpar, 24, 36, 1, &i_value, 11 );
489 FillMbAddrIncTable( p_vpar, 36, 48, 2, &i_value, 10 );
490 FillMbAddrIncTable( p_vpar, 48, 96, 8, &i_value, 8 );
491 FillMbAddrIncTable( p_vpar, 96, 128, 16, &i_value, 7 );
492 FillMbAddrIncTable( p_vpar, 128, 256, 64, &i_value, 5 );
493 FillMbAddrIncTable( p_vpar, 256, 512, 128, &i_value, 4 );
494 FillMbAddrIncTable( p_vpar, 512, 1024, 256, &i_value, 3 );
495 FillMbAddrIncTable( p_vpar, 1024, 2048, 1024, &i_value, 1 );
498 /*****************************************************************************
499 * vpar_Init*MBType : Initialize lookup table for the Macroblock type
500 *****************************************************************************/
502 /* Fonction for filling up the tables */
503 static void FillMBType( vpar_thread_t * p_vpar,
512 for( i_dummy = i_start ; i_dummy < i_end ; i_dummy++ )
514 p_vpar->ppl_mb_type[i_mb_type][i_dummy].i_value = i_value;
515 p_vpar->ppl_mb_type[i_mb_type][i_dummy].i_length = i_length;
519 /* Fonction that fills the table for P MB_Type */
520 void vpar_InitPMBType( vpar_thread_t * p_vpar )
522 FillMBType( p_vpar, 0, 32, 64, MB_MOTION_FORWARD|MB_PATTERN, 1 );
523 FillMBType( p_vpar, 0, 16, 32, MB_PATTERN, 2 );
524 FillMBType( p_vpar, 0, 8, 16, MB_MOTION_FORWARD, 3 );
525 FillMBType( p_vpar, 0, 6, 8, MB_INTRA, 5 );
526 FillMBType( p_vpar, 0, 4, 6, MB_QUANT|MB_MOTION_FORWARD|MB_PATTERN, 5 );
527 FillMBType( p_vpar, 0, 2, 4, MB_QUANT|MB_PATTERN, 5 );
528 p_vpar->ppl_mb_type[0][1].i_value = MB_QUANT|MB_INTRA;
529 p_vpar->ppl_mb_type[0][1].i_length = 6;
530 p_vpar->ppl_mb_type[0][0].i_value = MB_ERROR;
531 p_vpar->ppl_mb_type[0][0].i_length = 0;
534 /* Fonction that fills the table for B MB_Type */
535 void vpar_InitBMBType( vpar_thread_t * p_vpar )
537 FillMBType( p_vpar, 1, 48, 64, MB_MOTION_FORWARD
538 |MB_MOTION_BACKWARD|MB_PATTERN, 2 );
539 FillMBType( p_vpar, 1, 32, 48, MB_MOTION_FORWARD|MB_MOTION_BACKWARD, 2 );
540 FillMBType( p_vpar, 1, 24, 32, MB_MOTION_BACKWARD|MB_PATTERN, 3 );
541 FillMBType( p_vpar, 1, 16, 24, MB_MOTION_BACKWARD, 3 );
542 FillMBType( p_vpar, 1, 12, 16, MB_MOTION_FORWARD|MB_PATTERN, 4 );
543 FillMBType( p_vpar, 1, 8, 12, MB_MOTION_FORWARD, 4 );
544 FillMBType( p_vpar, 1, 6, 8, MB_INTRA, 5 );
545 FillMBType( p_vpar, 1, 4, 6, MB_QUANT|MB_MOTION_FORWARD
546 |MB_MOTION_BACKWARD|MB_PATTERN, 5 );
547 p_vpar->ppl_mb_type[1][3].i_value = MB_QUANT|MB_MOTION_FORWARD|MB_PATTERN;
548 p_vpar->ppl_mb_type[1][3].i_length = 6;
549 p_vpar->ppl_mb_type[1][2].i_value = MB_QUANT|MB_MOTION_BACKWARD|MB_PATTERN;
550 p_vpar->ppl_mb_type[1][2].i_length = 6;
551 p_vpar->ppl_mb_type[1][1].i_value = MB_QUANT|MB_INTRA;
552 p_vpar->ppl_mb_type[1][1].i_length = 6;
553 p_vpar->ppl_mb_type[1][0].i_value =MB_ERROR;
554 p_vpar->ppl_mb_type[1][0].i_length = 0;
558 /*****************************************************************************
559 * vpar_InitDCTTables : Initialize tables giving the length of the dct
560 * coefficient from the vlc code
561 *****************************************************************************/
563 /* First fonction for filling the table */
564 static void FillDCTTable( dct_lookup_t * p_tab_dest, dct_lookup_t * p_tab_src,
565 int i_step, int i_nb_elem, int i_offset )
567 int i_dummy, i_dummy2;
569 for( i_dummy=0 ; i_dummy < i_nb_elem ; i_dummy++ )
571 for( i_dummy2=0 ; i_dummy2 < i_step ; i_dummy2++ )
573 p_tab_dest[(i_dummy+i_offset)*i_step+i_dummy2] = p_tab_src[i_dummy];
579 /* Fonction that actually fills the table or create the pointers */
580 void vpar_InitDCTTables( vpar_thread_t * p_vpar )
582 /* Tables are cut in two parts to reduce memory occupation */
583 p_vpar->pppl_dct_dc_size[0][0] = pl_dct_dc_lum_init_table_1;
584 p_vpar->pppl_dct_dc_size[0][1] = pl_dct_dc_lum_init_table_2;
585 p_vpar->pppl_dct_dc_size[1][0] = pl_dct_dc_chrom_init_table_1;
586 p_vpar->pppl_dct_dc_size[1][1] = pl_dct_dc_chrom_init_table_2;
588 /* XXX?? MB_ERROR is replaced by 0 because if we use -1 we
589 * can block in DecodeMPEG2Intra and others */
590 memset( p_vpar->ppl_dct_coef[0], 0, 16 );
591 memset( p_vpar->ppl_dct_coef[1], 0, 16 );
593 /* For table B14 & B15, we have a pointer to tables */
594 /* We fill the table thanks to the fonction defined above */
595 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab0, 256, 60, 4 );
596 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab1, 64, 8, 8 );
597 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab2, 16, 16, 16 );
598 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab3, 8, 16, 16 );
599 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab4, 4, 16, 16 );
600 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab5, 2, 16, 16 );
601 FillDCTTable( p_vpar->ppl_dct_coef[0], pl_DCT_tab6, 1, 16, 16 );
603 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab0a, 256, 60, 4 );
604 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab1a, 64, 8, 8 );
605 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab2, 16, 16, 16 );
606 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab3, 8, 16, 16 );
607 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab4, 4, 16, 16 );
608 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab5, 2, 16, 16 );
609 FillDCTTable( p_vpar->ppl_dct_coef[1], pl_DCT_tab6, 1, 16, 16 );
612 /*****************************************************************************
613 * vpar_InitScanTable : Initialize scan table
614 *****************************************************************************/
615 void vpar_InitScanTable( vpar_thread_t * p_vpar )
619 memcpy( p_vpar->ppi_scan, pi_scan, sizeof(pi_scan) );
620 p_vpar->pf_norm_scan( p_vpar->ppi_scan );
622 /* If scan table has changed, we must change the quantization matrices. */
623 for( i = 0; i < 64; i++ )
625 p_vpar->pi_default_intra_quant[ p_vpar->ppi_scan[0][i] ] =
626 pi_default_intra_quant[ pi_scan[0][i] ];
627 p_vpar->pi_default_nonintra_quant[ p_vpar->ppi_scan[0][i] ] =
628 pi_default_nonintra_quant[ pi_scan[0][i] ];
637 /*****************************************************************************
638 * DecodeMPEG1NonIntra : decode MPEG-1 non-intra blocks
639 *****************************************************************************/
640 static __inline__ void DecodeMPEG1NonIntra( vpar_thread_t * p_vpar,
641 macroblock_t * p_mb, int i_b,
642 int i_chroma_format )
657 /* Give the chromatic component (0, 1, 2) */
658 i_cc = pi_cc_index[i_b];
660 /* Determine whether it is luminance or not (chrominance) */
661 b_chroma = ( i_cc + 1 ) >> 1;
663 /* There should be no D picture in non-intra blocks */
664 if( p_vpar->picture.i_coding_type == D_CODING_TYPE )
665 intf_ErrMsg("vpar error : D-picture in non intra block");
667 /* Decoding of the AC coefficients */
673 for( i_parse = 0; !p_vpar->p_fifo->b_die; i_parse++ )
675 i_code = ShowBits( &p_vpar->bit_stream, 16 );
676 if( i_code >= 16384 )
678 b_dc = (i_parse == 0);
679 i_run = ppl_dct_tab2[b_dc][(i_code>>12)-4].i_run;
680 i_level = ppl_dct_tab2[b_dc][(i_code>>12)-4].i_level;
681 i_length = ppl_dct_tab2[b_dc][(i_code>>12)-4].i_length;
685 i_run = p_vpar->ppl_dct_coef[0][i_code].i_run;
686 i_length = p_vpar->ppl_dct_coef[0][i_code].i_length;
687 i_level = p_vpar->ppl_dct_coef[0][i_code].i_level;
690 RemoveBits( &p_vpar->bit_stream, i_length );
695 i_run = GetBits( &p_vpar->bit_stream, 6 );
696 i_level = GetBits( &p_vpar->bit_stream, 8 );
698 i_level = GetBits( &p_vpar->bit_stream, 8 );
699 else if (i_level == 128)
700 i_level = GetBits( &p_vpar->bit_stream, 8 ) - 256;
701 else if (i_level > 128)
704 if( (b_sign = i_level < 0) )
711 p_mb->pf_idct[i_b] = p_vpar->pf_sparse_idct;
712 p_mb->pi_sparse_pos[i_b] = i_coef;
716 p_mb->pf_idct[i_b] = p_vpar->pf_idct;
722 b_sign = GetBits( &p_vpar->bit_stream, 1 );
733 i_pos = p_vpar->ppi_scan[p_vpar->picture.b_alternate_scan][i_parse];
734 i_level = ( ((i_level << 1) + 1) * p_vpar->mb.i_quantizer_scale
735 * p_vpar->sequence.nonintra_quant.pi_matrix[i_pos] ) >> 4;
737 /* Mismatch control */
738 if( i_level ) /* Should always be true */
740 /* Equivalent to : if( (val & 1) == 0 ) val = val - 1; */
741 i_level = (i_level - 1) | 1;
744 p_mb->ppi_blocks[i_b][i_pos] = b_sign ? -i_level : i_level;
747 intf_ErrMsg("vpar error: DCT coeff (non-intra) is out of bounds");
748 p_vpar->picture.b_error = 1;
751 /*****************************************************************************
752 * DecodeMPEG1Intra : decode MPEG-1 intra blocks
753 *****************************************************************************/
754 static __inline__ void DecodeMPEG1Intra( vpar_thread_t * p_vpar,
755 macroblock_t * p_mb, int i_b ,
756 int i_chroma_format )
772 /* Give the chromatic component (0, 1, 2) */
773 i_cc = pi_cc_index[i_b];
775 /* Determine whether it is luminance or not (chrominance) */
776 b_chroma = ( i_cc + 1 ) >> 1;
779 i_code = ShowBits(&p_vpar->bit_stream, 5);
783 i_dct_dc_size = ppl_dct_dc_init_table_1[b_chroma][i_code].i_value;
784 i_length = ppl_dct_dc_init_table_1[b_chroma][i_code].i_length;
785 RemoveBits( &p_vpar->bit_stream, i_length);
789 i_code = ShowBits(&p_vpar->bit_stream, (9+b_chroma)) - (0x1f0 * (b_chroma + 1));
790 i_dct_dc_size = ppl_dct_dc_init_table_2[b_chroma][i_code].i_value;
791 i_length = ppl_dct_dc_init_table_2[b_chroma][i_code].i_length;
792 RemoveBits( &p_vpar->bit_stream, i_length);
795 if (i_dct_dc_size == 0)
799 i_dct_dc_diff = GetBits( &p_vpar->bit_stream, i_dct_dc_size);
800 if ((i_dct_dc_diff & (1<<(i_dct_dc_size-1))) == 0)
801 i_dct_dc_diff -= (1<<i_dct_dc_size) - 1;
804 /* Read the actual code with the good length */
805 p_vpar->mb.pi_dc_dct_pred[i_cc] += i_dct_dc_diff;
807 p_mb->ppi_blocks[i_b][0] = p_vpar->mb.pi_dc_dct_pred[i_cc] << 3;
809 i_nc = ( p_vpar->mb.pi_dc_dct_pred[i_cc] != 0 );
812 if( p_vpar->picture.i_coding_type == D_CODING_TYPE )
814 /* Remove end_of_macroblock (always 1, prevents startcode emulation)
815 * ISO/IEC 11172-2 section 2.4.2.7 and 2.4.3.6 */
816 RemoveBits( &p_vpar->bit_stream, 1 );
817 /* D pictures do not have AC coefficients */
822 /* Decoding of the AC coefficients */
826 for( i_parse = 1; !p_vpar->p_fifo->b_die/*i_parse < 64*/; i_parse++ )
828 i_code = ShowBits( &p_vpar->bit_stream, 16 );
829 /* We use 2 main tables for the coefficients */
830 if( i_code >= 16384 )
832 i_run = ppl_dct_tab1[0][(i_code>>12)-4].i_run;
833 i_level = ppl_dct_tab1[0][(i_code>>12)-4].i_level;
834 i_length = ppl_dct_tab1[0][(i_code>>12)-4].i_length;
838 i_run = p_vpar->ppl_dct_coef[0][i_code].i_run;
839 i_length = p_vpar->ppl_dct_coef[0][i_code].i_length;
840 i_level = p_vpar->ppl_dct_coef[0][i_code].i_level;
843 RemoveBits( &p_vpar->bit_stream, i_length );
848 i_run = GetBits( &p_vpar->bit_stream, 6 );
849 i_level = GetBits( &p_vpar->bit_stream, 8 );
851 i_level = GetBits( &p_vpar->bit_stream, 8 );
852 else if (i_level == 128)
853 i_level = GetBits( &p_vpar->bit_stream, 8 ) - 256;
854 else if (i_level > 128)
856 if( (b_sign = i_level < 0) )
862 p_mb->pf_idct[i_b] = p_vpar->pf_sparse_idct;
863 p_mb->pi_sparse_pos[i_b] = i_coef;
867 p_mb->pf_idct[i_b] = p_vpar->pf_idct;
873 b_sign = GetBits( &p_vpar->bit_stream, 1 );
876 /* Prepare the next block */
883 /* We have an error in the stream */
887 /* Determine the position of the block in the frame */
888 i_pos = p_vpar->ppi_scan[p_vpar->picture.b_alternate_scan][i_parse];
889 i_level = ( i_level *
890 p_vpar->mb.i_quantizer_scale *
891 p_vpar->sequence.intra_quant.pi_matrix[i_pos] ) >> 3;
893 /* Mismatch control */
894 if( i_level ) /* Should always be true */
896 /* Equivalent to : if( (val & 1) == 0 ) val = val - 1; */
897 i_level = (i_level - 1) | 1;
900 p_mb->ppi_blocks[i_b][i_pos] = b_sign ? -i_level : i_level;
903 intf_ErrMsg("vpar error: DCT coeff (intra) is out of bounds");
904 p_vpar->picture.b_error = 1;
907 /*****************************************************************************
908 * DecodeMPEG2NonIntra : decode MPEG-2 non-intra blocks
909 *****************************************************************************/
910 static __inline__ void DecodeMPEG2NonIntra( vpar_thread_t * p_vpar,
911 macroblock_t * p_mb, int i_b,
912 int i_chroma_format )
928 /* Give the chromatic component (0, 1, 2) */
929 i_cc = pi_cc_index[i_b];
931 /* Determine whether it is luminance or not (chrominance) */
932 b_chroma = ( i_cc + 1 ) >> 1;
934 /* Give a pointer to the quantization matrices for intra blocks */
935 if( (i_chroma_format == CHROMA_420) || (!b_chroma) )
937 pi_quant = p_vpar->sequence.nonintra_quant.pi_matrix;
941 pi_quant = p_vpar->sequence.chroma_nonintra_quant.pi_matrix;
944 /* Decoding of the AC coefficients */
948 for( i_parse = 0; !p_vpar->p_fifo->b_die; i_parse++ )
950 i_code = ShowBits( &p_vpar->bit_stream, 16 );
951 if( i_code >= 16384 )
953 b_dc = (i_parse == 0);
954 i_run = ppl_dct_tab2[b_dc][(i_code>>12)-4].i_run;
955 i_level = ppl_dct_tab2[b_dc][(i_code>>12)-4].i_level;
956 i_length = ppl_dct_tab2[b_dc][(i_code>>12)-4].i_length;
960 i_run = p_vpar->ppl_dct_coef[0][i_code].i_run;
961 i_length = p_vpar->ppl_dct_coef[0][i_code].i_length;
962 i_level = p_vpar->ppl_dct_coef[0][i_code].i_level;
966 RemoveBits( &p_vpar->bit_stream, i_length );
971 i_run = GetBits( &p_vpar->bit_stream, 6 );
972 i_level = GetBits( &p_vpar->bit_stream, 12 );
973 i_level = (b_sign = ( i_level > 2047 )) ? 4096 - i_level
978 /* The MMX IDCT has a precision problem with non-intra
980 p_mb->ppi_blocks[i_b][0] += 4;
984 p_mb->pf_idct[i_b] = p_vpar->pf_sparse_idct;
985 p_mb->pi_sparse_pos[i_b] = i_coef;
989 p_mb->pf_idct[i_b] = p_vpar->pf_idct;
995 b_sign = GetBits( &p_vpar->bit_stream, 1 );
1006 i_pos = p_vpar->ppi_scan[p_vpar->picture.b_alternate_scan][i_parse];
1007 i_level = ( ((i_level << 1) + 1) * p_vpar->mb.i_quantizer_scale
1008 * pi_quant[i_pos] ) >> 5;
1009 p_mb->ppi_blocks[i_b][i_pos] = b_sign ? -i_level : i_level;
1012 intf_ErrMsg("vpar error: DCT coeff (non-intra) is out of bounds");
1013 p_vpar->picture.b_error = 1;
1016 /*****************************************************************************
1017 * DecodeMPEG2Intra : decode MPEG-2 intra blocks
1018 *****************************************************************************/
1019 static __inline__ void DecodeMPEG2Intra( vpar_thread_t * p_vpar,
1020 macroblock_t * p_mb, int i_b,
1021 int i_chroma_format )
1034 boolean_t b_vlc_intra;
1039 /* Give the chromatic component (0, 1, 2) */
1040 i_cc = pi_cc_index[i_b];
1042 /* Determine whether it is luminance or not (chrominance) */
1043 b_chroma = ( i_cc + 1 ) >> 1;
1045 /* Give a pointer to the quantization matrices for intra blocks */
1046 if( (i_chroma_format == CHROMA_420) || (!b_chroma) )
1048 pi_quant = p_vpar->sequence.intra_quant.pi_matrix;
1052 pi_quant = p_vpar->sequence.chroma_intra_quant.pi_matrix;
1056 i_code = ShowBits(&p_vpar->bit_stream, 5);
1060 i_dct_dc_size = ppl_dct_dc_init_table_1[b_chroma][i_code].i_value;
1061 i_length = ppl_dct_dc_init_table_1[b_chroma][i_code].i_length;
1062 RemoveBits( &p_vpar->bit_stream, i_length);
1066 i_code = ShowBits(&p_vpar->bit_stream, (9+b_chroma)) - (0x1f0 * (b_chroma + 1));
1067 i_dct_dc_size = ppl_dct_dc_init_table_2[b_chroma][i_code].i_value;
1068 i_length = ppl_dct_dc_init_table_2[b_chroma][i_code].i_length;
1069 RemoveBits( &p_vpar->bit_stream, i_length);
1072 if (i_dct_dc_size == 0)
1076 i_dct_dc_diff = GetBits( &p_vpar->bit_stream, i_dct_dc_size);
1077 if ((i_dct_dc_diff & (1<<(i_dct_dc_size-1))) == 0)
1078 i_dct_dc_diff -= (1<<i_dct_dc_size) - 1;
1081 /* Read the actual code with the good length */
1082 p_vpar->mb.pi_dc_dct_pred[i_cc] += i_dct_dc_diff;
1084 p_mb->ppi_blocks[i_b][0] = ( p_vpar->mb.pi_dc_dct_pred[i_cc] <<
1085 ( 3 - p_vpar->picture.i_intra_dc_precision ) );
1087 i_nc = ( p_vpar->mb.pi_dc_dct_pred[i_cc] != 0 );
1090 /* Decoding of the AC coefficients */
1093 b_vlc_intra = p_vpar->picture.b_intra_vlc_format;
1094 for( i_parse = 1; !p_vpar->p_fifo->b_die/*i_parse < 64*/; i_parse++ )
1096 i_code = ShowBits( &p_vpar->bit_stream, 16 );
1097 /* We use 2 main tables for the coefficients */
1098 if( i_code >= 16384 )
1100 i_run = ppl_dct_tab1[b_vlc_intra][(i_code>>(12-(4*b_vlc_intra)))-4].i_run;
1101 i_level = ppl_dct_tab1[b_vlc_intra][(i_code>>(12-(4*b_vlc_intra)))-4].i_level;
1102 i_length = ppl_dct_tab1[b_vlc_intra][(i_code>>(12-(4*b_vlc_intra)))-4].i_length;
1106 i_run = p_vpar->ppl_dct_coef[b_vlc_intra][i_code].i_run;
1107 i_length = p_vpar->ppl_dct_coef[b_vlc_intra][i_code].i_length;
1108 i_level = p_vpar->ppl_dct_coef[b_vlc_intra][i_code].i_level;
1111 RemoveBits( &p_vpar->bit_stream, i_length );
1116 i_run = GetBits( &p_vpar->bit_stream, 6 );
1117 i_level = GetBits( &p_vpar->bit_stream, 12 );
1118 i_level = (b_sign = ( i_level > 2047 )) ? 4096 - i_level
1124 p_mb->pf_idct[i_b] = p_vpar->pf_sparse_idct;
1125 p_mb->pi_sparse_pos[i_b] = i_coef;
1129 p_mb->pf_idct[i_b] = p_vpar->pf_idct;
1135 b_sign = GetBits( &p_vpar->bit_stream, 1 );
1138 /* Prepare the next block */
1145 /* We have an error in the stream */
1149 /* Determine the position of the block in the frame */
1150 i_pos = p_vpar->ppi_scan[p_vpar->picture.b_alternate_scan][i_parse];
1151 i_level = ( i_level *
1152 p_vpar->mb.i_quantizer_scale *
1153 pi_quant[i_pos] ) >> 4;
1154 p_mb->ppi_blocks[i_b][i_pos] = b_sign ? -i_level : i_level;
1157 intf_ErrMsg("vpar error: DCT coeff (intra) is out of bounds");
1158 p_vpar->picture.b_error = 1;
1166 /****************************************************************************
1167 * MotionCode : Parse the next motion code
1168 ****************************************************************************/
1169 static __inline__ int MotionCode( vpar_thread_t * p_vpar )
1172 static lookup_t pl_mv_tab0[8] =
1173 { {-1,0}, {3,3}, {2,2}, {2,2}, {1,1}, {1,1}, {1,1}, {1,1} };
1174 /* Table B-10, motion_code, codes 0000011 ... 000011x */
1175 static lookup_t pl_mv_tab1[8] =
1176 { {-1,0}, {-1,0}, {-1,0}, {7,6}, {6,6}, {5,6}, {4,5}, {4,5} };
1177 /* Table B-10, motion_code, codes 0000001100 ... 000001011x */
1178 static lookup_t pl_mv_tab2[12] = {
1179 {16,9}, {15,9}, {14,9}, {13,9},
1180 {12,9}, {11,9}, {10,8}, {10,8},
1181 {9,8}, {9,8}, {8,8}, {8,8} };
1183 if( GetBits( &p_vpar->bit_stream, 1 ) )
1187 if( (i_code = ShowBits( &p_vpar->bit_stream, 9) ) >= 64 )
1190 RemoveBits( &p_vpar->bit_stream, pl_mv_tab0[i_code].i_length );
1191 return( GetBits( &p_vpar->bit_stream, 1 ) ?
1192 -pl_mv_tab0[i_code].i_value : pl_mv_tab0[i_code].i_value );
1198 RemoveBits( &p_vpar->bit_stream, pl_mv_tab1[i_code].i_length );
1199 return( GetBits( &p_vpar->bit_stream, 1 ) ?
1200 -pl_mv_tab1[i_code].i_value : pl_mv_tab1[i_code].i_value );
1203 if( (i_code -= 12) < 0 )
1205 p_vpar->picture.b_error = 1;
1206 intf_DbgMsg( "vpar debug: Invalid motion_vector code" );
1210 RemoveBits( &p_vpar->bit_stream, pl_mv_tab2[i_code].i_length );
1211 return( GetBits( &p_vpar->bit_stream, 1 ) ?
1212 -pl_mv_tab2[i_code].i_value : pl_mv_tab2[i_code].i_value );
1215 /****************************************************************************
1216 * DecodeMotionVector : Decode a motion_vector
1217 ****************************************************************************/
1218 static __inline__ void DecodeMotionVector( int * pi_prediction, int i_r_size,
1219 int i_motion_code, int i_motion_residual, int i_full_pel )
1221 int i_limit, i_vector;
1223 /* ISO/IEC 13818-1 section 7.6.3.1 */
1224 i_limit = 16 << i_r_size;
1225 i_vector = *pi_prediction >> i_full_pel;
1227 if( i_motion_code > 0 )
1229 i_vector += ((i_motion_code-1) << i_r_size) + i_motion_residual + 1;
1230 if( i_vector >= i_limit )
1231 i_vector -= i_limit + i_limit;
1233 else if( i_motion_code < 0 )
1235 i_vector -= ((-i_motion_code-1) << i_r_size) + i_motion_residual + 1;
1236 if( i_vector < -i_limit )
1237 i_vector += i_limit + i_limit;
1239 *pi_prediction = i_vector << i_full_pel;
1242 /****************************************************************************
1243 * MotionVector : Parse the next motion_vector field
1244 ****************************************************************************/
1245 static __inline__ void MotionVector( vpar_thread_t * p_vpar,
1246 macroblock_t * p_mb, int i_r,
1247 int i_s, int i_full_pel, int i_structure,
1248 int i_h_r_size, int i_v_r_size )
1250 int i_motion_code, i_motion_residual;
1251 int pi_dm_vector[2];
1253 i_motion_code = MotionCode( p_vpar );
1254 i_motion_residual = (i_h_r_size != 0 && i_motion_code != 0) ?
1255 GetBits( &p_vpar->bit_stream, i_h_r_size) : 0;
1256 DecodeMotionVector( &p_vpar->mb.pppi_pmv[i_r][i_s][0], i_h_r_size,
1257 i_motion_code, i_motion_residual, i_full_pel );
1258 p_mb->pppi_motion_vectors[i_r][i_s][0] = p_vpar->mb.pppi_pmv[i_r][i_s][0];
1260 if( p_vpar->mb.b_dmv )
1262 if( GetBits(&p_vpar->bit_stream, 1) )
1264 pi_dm_vector[0] = GetBits( &p_vpar->bit_stream, 1 ) ? -1 : 1;
1268 pi_dm_vector[0] = 0;
1272 i_motion_code = MotionCode( p_vpar );
1273 i_motion_residual = (i_v_r_size != 0 && i_motion_code != 0) ?
1274 GetBits( &p_vpar->bit_stream, i_v_r_size) : 0;
1277 if( (p_vpar->mb.i_mv_format == MOTION_FIELD)
1278 && (i_structure == FRAME_STRUCTURE) )
1280 p_vpar->mb.pppi_pmv[i_r][i_s][1] >>= 1;
1283 DecodeMotionVector( &p_vpar->mb.pppi_pmv[i_r][i_s][1], i_v_r_size,
1284 i_motion_code, i_motion_residual, i_full_pel );
1286 if( (p_vpar->mb.i_mv_format == MOTION_FIELD)
1287 && (i_structure == FRAME_STRUCTURE) )
1288 p_vpar->mb.pppi_pmv[i_r][i_s][1] <<= 1;
1290 p_mb->pppi_motion_vectors[i_r][i_s][1] = p_vpar->mb.pppi_pmv[i_r][i_s][1];
1292 if( p_vpar->mb.b_dmv )
1294 if( GetBits(&p_vpar->bit_stream, 1) )
1296 pi_dm_vector[1] = GetBits( &p_vpar->bit_stream, 1 ) ? -1 : 1;
1300 pi_dm_vector[1] = 0;
1303 /* Dual Prime Arithmetic (ISO/IEC 13818-2 section 7.6.3.6). */
1305 #define i_mv_x p_mb->pppi_motion_vectors[0][0][0]
1306 if( i_structure == FRAME_STRUCTURE )
1308 #define i_mv_y (p_mb->pppi_motion_vectors[0][0][1] << 1)
1309 if( p_vpar->picture.b_top_field_first )
1311 /* vector for prediction of top field from bottom field */
1312 p_mb->ppi_dmv[0][0] = ((i_mv_x + (i_mv_x > 0)) >> 1) + pi_dm_vector[0];
1313 p_mb->ppi_dmv[0][1] = ((i_mv_y + (i_mv_y > 0)) >> 1) + pi_dm_vector[1] - 1;
1315 /* vector for prediction of bottom field from top field */
1316 p_mb->ppi_dmv[1][0] = ((3*i_mv_x + (i_mv_x > 0)) >> 1) + pi_dm_vector[0];
1317 p_mb->ppi_dmv[1][1] = ((3*i_mv_y + (i_mv_y > 0)) >> 1) + pi_dm_vector[1] + 1;
1321 /* vector for prediction of top field from bottom field */
1322 p_mb->ppi_dmv[0][0] = ((3*i_mv_x + (i_mv_x > 0)) >> 1) + pi_dm_vector[0];
1323 p_mb->ppi_dmv[0][1] = ((3*i_mv_y + (i_mv_y > 0)) >> 1) + pi_dm_vector[1] - 1;
1325 /* vector for prediction of bottom field from top field */
1326 p_mb->ppi_dmv[1][0] = ((i_mv_x + (i_mv_x > 0)) >> 1) + pi_dm_vector[0];
1327 p_mb->ppi_dmv[1][1] = ((i_mv_y + (i_mv_y > 0)) >> 1) + pi_dm_vector[1] + 1;
1333 #define i_mv_y p_mb->pppi_motion_vectors[0][0][1]
1334 /* vector for prediction from field of opposite 'parity' */
1335 p_mb->ppi_dmv[0][0] = ((i_mv_x + (i_mv_x > 0)) >> 1) + pi_dm_vector[0];
1336 p_mb->ppi_dmv[0][1] = ((i_mv_y + (i_mv_y > 0)) >> 1) + pi_dm_vector[1];
1338 /* correct for vertical field shift */
1339 if( p_vpar->picture.i_structure == TOP_FIELD )
1340 p_mb->ppi_dmv[0][1]--;
1342 p_mb->ppi_dmv[0][1]++;
1349 /*****************************************************************************
1350 * DecodeMVMPEG1 : Parse the next MPEG-1 motion vectors
1351 *****************************************************************************/
1352 static void DecodeMVMPEG1( vpar_thread_t * p_vpar,
1353 macroblock_t * p_mb, int i_s, int i_structure )
1355 int i_r_size = i_s ? p_vpar->picture.i_backward_f_code - 1 :
1356 p_vpar->picture.i_forward_f_code - 1;
1357 MotionVector( p_vpar, p_mb, 0, i_s,
1358 p_vpar->picture.pb_full_pel_vector[i_s], FRAME_STRUCTURE,
1359 i_r_size, i_r_size );
1362 /*****************************************************************************
1363 * DecodeMVMPEG2 : Parse the next MPEG-2 motion_vectors field
1364 *****************************************************************************/
1365 static void DecodeMVMPEG2( vpar_thread_t * p_vpar,
1366 macroblock_t * p_mb, int i_s, int i_structure )
1368 if( p_vpar->mb.i_mv_count == 1 )
1370 if( p_vpar->mb.i_mv_format == MOTION_FIELD && !p_vpar->mb.b_dmv )
1372 p_mb->ppi_field_select[0][i_s] = p_mb->ppi_field_select[1][i_s]
1373 = GetBits( &p_vpar->bit_stream, 1 );
1375 MotionVector( p_vpar, p_mb, 0, i_s, 0, i_structure,
1376 p_vpar->picture.ppi_f_code[i_s][0] - 1,
1377 p_vpar->picture.ppi_f_code[i_s][1] - 1 );
1378 p_vpar->mb.pppi_pmv[1][i_s][0] = p_vpar->mb.pppi_pmv[0][i_s][0];
1379 p_vpar->mb.pppi_pmv[1][i_s][1] = p_vpar->mb.pppi_pmv[0][i_s][1];
1380 p_mb->pppi_motion_vectors[1][i_s][0] = p_vpar->mb.pppi_pmv[0][i_s][0];
1381 p_mb->pppi_motion_vectors[1][i_s][1] = p_vpar->mb.pppi_pmv[0][i_s][1];
1385 p_mb->ppi_field_select[0][i_s] = GetBits( &p_vpar->bit_stream, 1 );
1386 MotionVector( p_vpar, p_mb, 0, i_s, 0, i_structure,
1387 p_vpar->picture.ppi_f_code[i_s][0] - 1,
1388 p_vpar->picture.ppi_f_code[i_s][1] - 1 );
1389 p_mb->ppi_field_select[1][i_s] = GetBits( &p_vpar->bit_stream, 1 );
1390 MotionVector( p_vpar, p_mb, 1, i_s, 0, i_structure,
1391 p_vpar->picture.ppi_f_code[i_s][0] - 1,
1392 p_vpar->picture.ppi_f_code[i_s][1] - 1 );
1398 * Macroblock information structures
1401 /*****************************************************************************
1402 * MacroblockAddressIncrement : Get the macroblock_address_increment field
1403 *****************************************************************************/
1404 static int MacroblockAddressIncrement( vpar_thread_t * p_vpar )
1407 /* Index in the lookup table mb_addr_inc */
1408 int i_index = ShowBits( &p_vpar->bit_stream, 11 );
1410 /* Test the presence of the escape character */
1411 while( i_index == 8 )
1413 RemoveBits( &p_vpar->bit_stream, 11 );
1415 i_index = ShowBits( &p_vpar->bit_stream, 11 );
1418 /* Affect the value from the lookup table */
1419 i_addr_inc += p_vpar->pl_mb_addr_inc[i_index].i_value;
1421 /* Dump the good number of bits */
1422 RemoveBits( &p_vpar->bit_stream, p_vpar->pl_mb_addr_inc[i_index].i_length );
1427 /*****************************************************************************
1428 * IMBType : macroblock_type in I pictures
1429 *****************************************************************************/
1430 static __inline__ int IMBType( vpar_thread_t * p_vpar )
1432 /* Take two bits for testing */
1433 int i_type = ShowBits( &p_vpar->bit_stream, 2 );
1435 /* Lookup table for macroblock_type */
1436 static lookup_t pl_mb_Itype[4] = { {MB_ERROR, 0},
1437 {MB_QUANT|MB_INTRA, 2},
1440 /* Dump the good number of bits */
1441 RemoveBits( &p_vpar->bit_stream, pl_mb_Itype[i_type].i_length );
1442 return pl_mb_Itype[i_type].i_value;
1445 /*****************************************************************************
1446 * PMBType : macroblock_type in P pictures
1447 *****************************************************************************/
1448 static __inline__ int PMBType( vpar_thread_t * p_vpar )
1450 /* Testing on 6 bits */
1451 int i_type = ShowBits( &p_vpar->bit_stream, 6 );
1453 /* Dump the good number of bits */
1454 RemoveBits( &p_vpar->bit_stream, p_vpar->ppl_mb_type[0][i_type].i_length );
1455 /* return the value from the lookup table for P type */
1456 return p_vpar->ppl_mb_type[0][i_type].i_value;
1459 /*****************************************************************************
1460 * BMBType : macroblock_type in B pictures
1461 *****************************************************************************/
1462 static __inline__ int BMBType( vpar_thread_t * p_vpar )
1464 /* Testing on 6 bits */
1465 int i_type = ShowBits( &p_vpar->bit_stream, 6 );
1467 /* Dump the good number of bits */
1468 RemoveBits( &p_vpar->bit_stream, p_vpar->ppl_mb_type[1][i_type].i_length );
1470 /* return the value from the lookup table for B type */
1471 return p_vpar->ppl_mb_type[1][i_type].i_value;
1474 /*****************************************************************************
1475 * DMBType : macroblock_type in D pictures
1476 *****************************************************************************/
1477 static __inline__ int DMBType( vpar_thread_t * p_vpar )
1479 return GetBits( &p_vpar->bit_stream, 1 );
1482 /*****************************************************************************
1483 * CodedPattern420 : coded_block_pattern with 4:2:0 chroma
1484 *****************************************************************************/
1485 static __inline__ int CodedPattern420( vpar_thread_t * p_vpar )
1487 /* Take the max 9 bits length vlc code for testing */
1488 int i_vlc = ShowBits( &p_vpar->bit_stream, 9 );
1490 /* Trash the good number of bits read in the lookup table */
1491 RemoveBits( &p_vpar->bit_stream, pl_coded_pattern[i_vlc].i_length );
1493 /* return the value from the vlc table */
1494 return pl_coded_pattern[i_vlc].i_value;
1497 /*****************************************************************************
1498 * CodedPattern422 : coded_block_pattern with 4:2:2 chroma
1499 *****************************************************************************/
1500 static __inline__ int CodedPattern422( vpar_thread_t * p_vpar )
1502 int i_vlc = ShowBits( &p_vpar->bit_stream, 9 );
1504 RemoveBits( &p_vpar->bit_stream, pl_coded_pattern[i_vlc].i_length );
1506 /* Supplementary 2 bits long code for 4:2:2 format */
1507 return pl_coded_pattern[i_vlc].i_value |
1508 (GetBits( &p_vpar->bit_stream, 2 ) << 6);
1511 /*****************************************************************************
1512 * CodedPattern444 : coded_block_pattern with 4:4:4 chroma
1513 *****************************************************************************/
1514 static __inline__ int CodedPattern444( vpar_thread_t * p_vpar )
1516 int i_vlc = ShowBits( &p_vpar->bit_stream, 9 );
1518 RemoveBits( &p_vpar->bit_stream, pl_coded_pattern[i_vlc].i_length );
1520 return pl_coded_pattern[i_vlc].i_value |
1521 (GetBits( &p_vpar->bit_stream, 6 ) << 6);
1524 /*****************************************************************************
1525 * InitMacroblock : Initialize macroblock values
1526 *****************************************************************************/
1527 static __inline__ void InitMacroblock( vpar_thread_t * p_vpar,
1528 macroblock_t * p_mb, int i_coding_type,
1529 int i_chroma_format,
1531 boolean_t b_second_field )
1533 p_mb->i_chroma_nb_blocks = 1 << i_chroma_format;
1534 p_mb->p_picture = p_vpar->picture.p_picture;
1536 if( i_coding_type == B_CODING_TYPE )
1537 p_mb->p_backward = p_vpar->sequence.p_backward;
1539 p_mb->p_backward = NULL;
1540 if( (i_coding_type == P_CODING_TYPE) || (i_coding_type == B_CODING_TYPE) )
1541 p_mb->p_forward = p_vpar->sequence.p_forward;
1543 p_mb->p_forward = NULL;
1545 p_mb->i_l_x = p_vpar->mb.i_l_x;
1546 p_mb->i_c_x = p_vpar->mb.i_c_x;
1547 p_mb->i_motion_l_y = p_vpar->mb.i_l_y;
1548 p_mb->i_motion_c_y = p_vpar->mb.i_c_y;
1549 if( (p_mb->b_motion_field = (i_structure == BOTTOM_FIELD)) )
1551 p_mb->i_motion_l_y--;
1552 p_mb->i_motion_c_y--;
1554 p_mb->i_addb_l_stride = (p_mb->i_l_stride = p_vpar->picture.i_l_stride) - 8;
1555 p_mb->i_addb_c_stride = (p_mb->i_c_stride = p_vpar->picture.i_c_stride) - 8;
1556 p_mb->b_P_second = ( b_second_field && i_coding_type == P_CODING_TYPE );
1559 /*****************************************************************************
1560 * UpdateContext : Update the p_vpar contextual values
1561 *****************************************************************************/
1562 static __inline__ void UpdateContext( vpar_thread_t * p_vpar, int i_structure )
1564 /* Update macroblock real position. */
1565 p_vpar->mb.i_l_x += 16;
1566 p_vpar->mb.i_l_y += (p_vpar->mb.i_l_x / p_vpar->sequence.i_width)
1567 * (2 - (i_structure == FRAME_STRUCTURE)) * 16;
1568 p_vpar->mb.i_l_x %= p_vpar->sequence.i_width;
1570 p_vpar->mb.i_c_x += p_vpar->sequence.i_chroma_mb_width;
1571 p_vpar->mb.i_c_y += (p_vpar->mb.i_c_x / p_vpar->sequence.i_chroma_width)
1572 * (2 - (i_structure == FRAME_STRUCTURE))
1573 * p_vpar->sequence.i_chroma_mb_height;
1574 p_vpar->mb.i_c_x %= p_vpar->sequence.i_chroma_width;
1577 /*****************************************************************************
1578 * SkippedMacroblock : Generate a skipped macroblock with NULL motion vector
1579 *****************************************************************************/
1580 static __inline__ void SkippedMacroblock( vpar_thread_t * p_vpar, int i_mb,
1581 int i_mb_base, int i_coding_type,
1582 int i_chroma_format,
1584 boolean_t b_second_field )
1586 macroblock_t * p_mb;
1588 static f_motion_t pf_motion_skipped[4][4] =
1590 {NULL, NULL, NULL, NULL},
1591 {NULL, vdec_MotionFieldField420, vdec_MotionFieldField420,
1592 vdec_MotionFrameFrame420},
1593 {NULL, vdec_MotionFieldField422, vdec_MotionFieldField422,
1594 vdec_MotionFrameFrame422},
1595 {NULL, vdec_MotionFieldField444, vdec_MotionFieldField444,
1596 vdec_MotionFrameFrame444},
1599 if( i_coding_type == I_CODING_TYPE )
1601 intf_DbgMsg("vpar error: skipped macroblock in I-picture");
1602 p_vpar->picture.b_error = 1;
1606 if( (p_mb = vpar_NewMacroblock( &p_vpar->vfifo )) == NULL )
1612 p_vpar->picture.pp_mb[i_mb_base + i_mb] = p_mb;
1615 InitMacroblock( p_vpar, p_mb, i_coding_type, i_chroma_format,
1616 i_structure, b_second_field );
1618 /* Motion type is picture structure. */
1619 p_mb->pf_motion = pf_motion_skipped[i_chroma_format]
1621 p_mb->i_coded_block_pattern = 0;
1623 /* Motion direction and motion vectors depend on the coding type. */
1624 if( i_coding_type == B_CODING_TYPE )
1627 p_mb->i_mb_type = p_vpar->mb.i_motion_dir;
1628 for( i = 0; i < 2; i++ )
1629 for( j = 0; j < 2; j++ )
1630 for( k = 0; k < 2; k++ )
1631 p_mb->pppi_motion_vectors[i][j][k] = p_vpar->mb.pppi_pmv[i][j][k];
1633 else if( i_coding_type == P_CODING_TYPE )
1635 p_mb->i_mb_type = MB_MOTION_FORWARD;
1636 memset( p_mb->pppi_motion_vectors, 0, 8*sizeof(int) );
1639 /* Set the field we use for motion compensation */
1640 p_mb->ppi_field_select[0][0] = p_mb->ppi_field_select[0][1]
1641 = ( i_structure == BOTTOM_FIELD );
1643 UpdateContext( p_vpar, i_structure );
1646 /* Decode the macroblock NOW ! */
1647 vpar_DecodeMacroblock ( &p_vpar->vfifo, p_mb );
1651 /*****************************************************************************
1652 * MacroblockModes : Get the macroblock_modes structure
1653 *****************************************************************************/
1654 static __inline__ void MacroblockModes( vpar_thread_t * p_vpar,
1655 macroblock_t * p_mb,
1656 int i_chroma_format,
1660 static int ppi_mv_count[2][4] = { {0, 1, 2, 1}, {0, 2, 1, 1} };
1661 static int ppi_mv_format[2][4] = { {0, 1, 1, 1}, {0, 1, 2, 1} };
1663 /* Get macroblock_type. */
1664 switch( i_coding_type )
1667 p_mb->i_mb_type = PMBType( p_vpar );
1670 p_mb->i_mb_type = BMBType( p_vpar );
1673 p_mb->i_mb_type = IMBType( p_vpar );
1676 p_mb->i_mb_type = DMBType( p_vpar );
1679 if( i_coding_type == B_CODING_TYPE )
1681 /* We need to remember the motion direction of the last macroblock
1682 * before a skipped macroblock (ISO/IEC 13818-2 7.6.6) */
1683 p_vpar->mb.i_motion_dir = p_mb->i_mb_type
1684 & (MB_MOTION_FORWARD | MB_MOTION_BACKWARD);
1687 /* SCALABILITY : warning, we don't know if spatial_temporal_weight_code
1688 * has to be dropped, take care if you use scalable streams. */
1689 /* RemoveBits( &p_vpar->bit_stream, 2 ); */
1691 if( (i_coding_type == P_CODING_TYPE || i_coding_type == B_CODING_TYPE)
1692 && (p_mb->i_mb_type & (MB_MOTION_FORWARD | MB_MOTION_BACKWARD)) )
1694 if( !(i_structure == FRAME_STRUCTURE
1695 && p_vpar->picture.b_frame_pred_frame_dct) )
1697 p_vpar->mb.i_motion_type = GetBits( &p_vpar->bit_stream, 2 );
1701 p_vpar->mb.i_motion_type = MOTION_FRAME;
1705 p_vpar->mb.i_mv_count = ppi_mv_count[i_structure == FRAME_STRUCTURE]
1706 [p_vpar->mb.i_motion_type];
1707 p_vpar->mb.i_mv_format = ppi_mv_format[i_structure == FRAME_STRUCTURE]
1708 [p_vpar->mb.i_motion_type];
1709 p_vpar->mb.b_dmv = p_vpar->mb.i_motion_type == MOTION_DMV;
1712 p_vpar->mb.b_dct_type = 0;
1713 if( (i_structure == FRAME_STRUCTURE) &&
1714 (!p_vpar->picture.b_frame_pred_frame_dct) &&
1715 (p_mb->i_mb_type & (MB_PATTERN|MB_INTRA)) )
1717 if( (p_vpar->mb.b_dct_type = GetBits( &p_vpar->bit_stream, 1 )) )
1719 /* The DCT is coded on fields. Jump one line between each
1721 p_mb->i_addb_l_stride <<= 1;
1722 p_mb->i_addb_l_stride += 8;
1723 /* With CHROMA_420, the DCT is necessarily frame-coded. */
1724 if( i_chroma_format != CHROMA_420 )
1726 p_mb->i_addb_c_stride <<= 1;
1727 p_mb->i_addb_c_stride += 8;
1733 /*****************************************************************************
1734 * ParseMacroblock : Parse the next macroblock
1735 *****************************************************************************/
1736 #define PARSEERROR \
1737 if( p_vpar->picture.b_error ) \
1739 /* Mark this block as skipped (better than green blocks), and \
1740 * go to the next slice. */ \
1741 (*pi_mb_address)--; \
1742 vpar_DestroyMacroblock( &p_vpar->vfifo, p_mb ); \
1746 #define PARSEBLOCKS( MPEG1FUNC, MPEG2FUNC ) \
1748 i_mask = 1 << (3 + (1 << i_chroma_format)); \
1751 p_data1 = p_mb->p_picture->p_y \
1752 + p_mb->i_l_x + p_vpar->mb.i_l_y*(p_vpar->sequence.i_width); \
1754 for( i_b = 0 ; i_b < 4 ; i_b++, i_mask >>= 1 ) \
1756 if( p_mb->i_coded_block_pattern & i_mask ) \
1758 memset( p_mb->ppi_blocks[i_b], 0, 64*sizeof(dctelem_t) ); \
1760 MPEG2FUNC( p_vpar, p_mb, i_b, i_chroma_format ); \
1762 MPEG1FUNC( p_vpar, p_mb, i_b, i_chroma_format ); \
1764 /* Calculate block coordinates. */ \
1765 p_mb->p_data[i_b] = p_data1 \
1766 + pi_y[p_vpar->mb.b_dct_type][i_b] \
1767 * p_vpar->picture.i_l_stride \
1775 p_data1 = p_mb->p_picture->p_u \
1777 + p_vpar->mb.i_c_y \
1778 * (p_vpar->sequence.i_chroma_width); \
1779 p_data2 = p_mb->p_picture->p_v \
1781 + p_vpar->mb.i_c_y \
1782 * (p_vpar->sequence.i_chroma_width); \
1784 for( i_b = 4; i_b < 4 + (1 << i_chroma_format); \
1785 i_b++, i_mask >>= 1 ) \
1787 yuv_data_t * pp_data[2] = {p_data1, p_data2}; \
1789 if( p_mb->i_coded_block_pattern & i_mask ) \
1791 memset( p_mb->ppi_blocks[i_b], 0, 64*sizeof(dctelem_t) ); \
1793 MPEG2FUNC( p_vpar, p_mb, i_b, i_chroma_format ); \
1795 MPEG1FUNC( p_vpar, p_mb, i_b, i_chroma_format ); \
1797 /* Calculate block coordinates. */ \
1798 p_mb->p_data[i_b] = pp_data[i_b & 1] \
1799 + pi_y[p_vpar->mb.b_dct_type][i_b] \
1800 * p_vpar->picture.i_c_stride \
1808 static __inline__ void ParseMacroblock(
1809 vpar_thread_t * p_vpar,
1810 int * pi_mb_address, /* previous address to be
1811 * used for mb_addr_incr */
1812 int i_mb_previous, /* actual previous mb */
1813 int i_mb_base, /* non-zero if field structure */
1814 /* The following parameters are explicit in
1815 * optimized routines : */
1816 boolean_t b_mpeg2, /* you know what ? */
1817 int i_coding_type, /* I, P, B or D */
1818 int i_chroma_format, /* 4:2:0, 4:2:2 or 4:4:4 */
1819 int i_structure, /* T(OP), B(OTTOM) or F(RAME) */
1820 boolean_t b_second_field ) /* second field of a
1823 static f_motion_t pppf_motion[4][2][4] =
1825 { {NULL, NULL, NULL, NULL},
1826 {NULL, NULL, NULL, NULL}
1828 { {NULL, vdec_MotionFieldField420, vdec_MotionField16x8420,
1829 vdec_MotionFieldDMV420},
1830 {NULL, vdec_MotionFrameField420, vdec_MotionFrameFrame420,
1831 vdec_MotionFrameDMV420}
1833 { {NULL, vdec_MotionFieldField422, vdec_MotionField16x8422,
1834 vdec_MotionFieldDMV422},
1835 {NULL, vdec_MotionFrameField422, vdec_MotionFrameFrame422,
1836 vdec_MotionFrameDMV422}
1838 { {NULL, vdec_MotionFieldField444, vdec_MotionField16x8444,
1839 vdec_MotionFieldDMV444},
1840 {NULL, vdec_MotionFrameField444, vdec_MotionFrameFrame444,
1841 vdec_MotionFrameDMV444}
1844 static int pi_x[12] = {0,8,0,8,0,0,0,0,8,8,8,8};
1845 static int pi_y[2][12] = { {0,0,8,8,0,0,8,8,0,0,8,8},
1846 {0,0,1,1,0,0,1,1,0,0,1,1} };
1847 int i_mb, i_b, i_mask;
1849 macroblock_t * p_mb;
1850 yuv_data_t * p_data1;
1851 yuv_data_t * p_data2;
1853 i_inc = MacroblockAddressIncrement( p_vpar );
1854 *pi_mb_address += i_inc;
1858 intf_ErrMsg( "vpar error: bad address increment (%d)", i_inc );
1859 p_vpar->picture.b_error = 1;
1863 if( *pi_mb_address - i_mb_previous - 1 )
1865 /* Skipped macroblock (ISO/IEC 13818-2 7.6.6). */
1867 /* Reset DC predictors (7.2.1). */
1868 p_vpar->mb.pi_dc_dct_pred[0] = p_vpar->mb.pi_dc_dct_pred[1]
1869 = p_vpar->mb.pi_dc_dct_pred[2]
1870 = 1 << (7 + p_vpar->picture.i_intra_dc_precision);
1872 if( i_coding_type == P_CODING_TYPE )
1874 /* Reset motion vector predictors (ISO/IEC 13818-2 7.6.3.4). */
1875 memset( p_vpar->mb.pppi_pmv, 0, 8*sizeof(int) );
1878 for( i_mb = i_mb_previous + 1; i_mb < *pi_mb_address; i_mb++ )
1880 SkippedMacroblock( p_vpar, i_mb, i_mb_base, i_coding_type,
1881 i_chroma_format, i_structure, b_second_field );
1885 /* Get a macroblock structure. */
1886 if( (p_mb = vpar_NewMacroblock( &p_vpar->vfifo )) == NULL )
1892 p_vpar->picture.pp_mb[i_mb_base + *pi_mb_address] = p_mb;
1895 InitMacroblock( p_vpar, p_mb, i_coding_type, i_chroma_format,
1896 i_structure, b_second_field );
1898 /* Parse off macroblock_modes structure. */
1899 MacroblockModes( p_vpar, p_mb, i_chroma_format, i_coding_type,
1902 if( p_mb->i_mb_type & MB_QUANT )
1904 LoadQuantizerScale( p_vpar );
1907 if( (i_coding_type == P_CODING_TYPE || i_coding_type == B_CODING_TYPE)
1908 && (p_mb->i_mb_type & MB_MOTION_FORWARD) )
1911 DecodeMVMPEG2( p_vpar, p_mb, 0, i_structure );
1913 DecodeMVMPEG1( p_vpar, p_mb, 0, i_structure );
1917 if( (i_coding_type == B_CODING_TYPE)
1918 && (p_mb->i_mb_type & MB_MOTION_BACKWARD) )
1921 DecodeMVMPEG2( p_vpar, p_mb, 1, i_structure );
1923 DecodeMVMPEG1( p_vpar, p_mb, 1, i_structure );
1927 if( i_coding_type == P_CODING_TYPE
1928 && !(p_mb->i_mb_type & (MB_MOTION_FORWARD|MB_INTRA)) )
1930 /* Special No-MC macroblock in P pictures (7.6.3.5). */
1931 p_mb->i_mb_type |= MB_MOTION_FORWARD;
1932 memset( p_vpar->mb.pppi_pmv, 0, 8*sizeof(int) );
1933 memset( p_mb->pppi_motion_vectors, 0, 8*sizeof(int) );
1934 p_vpar->mb.i_motion_type = 1 + (i_structure == FRAME_STRUCTURE);
1935 p_mb->ppi_field_select[0][0] = (i_structure == BOTTOM_FIELD);
1938 if( (i_coding_type != I_CODING_TYPE) && !(p_mb->i_mb_type & MB_INTRA) )
1940 /* Reset DC predictors (7.2.1). */
1941 p_vpar->mb.pi_dc_dct_pred[0] = p_vpar->mb.pi_dc_dct_pred[1]
1942 = p_vpar->mb.pi_dc_dct_pred[2]
1943 = 1 << (7 + p_vpar->picture.i_intra_dc_precision);
1945 /* Motion function pointer. */
1946 p_mb->pf_motion = pppf_motion[i_chroma_format]
1947 [i_structure == FRAME_STRUCTURE]
1948 [p_vpar->mb.i_motion_type];
1950 if( p_mb->i_mb_type & MB_PATTERN )
1952 switch( i_chroma_format )
1955 p_mb->i_coded_block_pattern = CodedPattern420( p_vpar );
1958 p_mb->i_coded_block_pattern = CodedPattern422( p_vpar );
1961 p_mb->i_coded_block_pattern = CodedPattern444( p_vpar );
1966 p_mb->i_coded_block_pattern = 0;
1970 * Effectively decode blocks.
1972 PARSEBLOCKS( DecodeMPEG1NonIntra, DecodeMPEG2NonIntra )
1976 if( !p_vpar->picture.b_concealment_mv )
1978 /* Reset MV predictors. */
1979 memset( p_vpar->mb.pppi_pmv, 0, 8*sizeof(int) );
1984 DecodeMVMPEG2( p_vpar, p_mb, 0, i_structure );
1986 DecodeMVMPEG1( p_vpar, p_mb, 0, i_structure );
1987 RemoveBits( &p_vpar->bit_stream, 1 );
1990 if( p_mb->i_mb_type & MB_PATTERN )
1992 switch( i_chroma_format )
1995 p_mb->i_coded_block_pattern = CodedPattern420( p_vpar );
1998 p_mb->i_coded_block_pattern = CodedPattern422( p_vpar );
2001 p_mb->i_coded_block_pattern = CodedPattern444( p_vpar );
2006 p_mb->i_coded_block_pattern =
2007 (1 << (4 + (1 << i_chroma_format))) - 1;
2011 * Effectively decode blocks.
2013 PARSEBLOCKS( DecodeMPEG1Intra, DecodeMPEG2Intra )
2016 if( !p_vpar->picture.b_error )
2018 UpdateContext( p_vpar, i_structure );
2020 /* Decode the macroblock NOW ! */
2021 vpar_DecodeMacroblock ( &p_vpar->vfifo, p_mb );
2026 /* Mark this block as skipped (better than green blocks), and go
2027 * to the next slice. */
2029 vpar_DestroyMacroblock( &p_vpar->vfifo, p_mb );
2034 * Picture data parsing management
2037 /*****************************************************************************
2038 * ParseMacroblockVWXYZ : Parse the next macroblock ; specific functions
2039 *****************************************************************************
2042 * X = chroma format ?
2044 * Z = second field ?
2045 *****************************************************************************/
2046 void ParseMacroblockGENERIC( vpar_thread_t * p_vpar, int * pi_mb_address,
2047 int i_mb_previous, int i_mb_base,
2048 boolean_t b_mpeg2, int i_coding_type,
2049 int i_chroma_format, int i_structure,
2050 boolean_t b_second_field )
2052 ParseMacroblock( p_vpar, pi_mb_address, i_mb_previous, i_mb_base,
2053 b_mpeg2, i_coding_type, i_chroma_format,
2054 i_structure, b_second_field );
2057 #if (VPAR_OPTIM_LEVEL > 0)
2058 /* Optimizations for frame pictures */
2059 void ParseMacroblock2I420F0( vpar_thread_t * p_vpar, int * pi_mb_address, int i_mb_previous, int i_mb_base,
2060 boolean_t b_mpeg2, int i_coding_type,
2061 int i_chroma_format, int i_structure,
2062 boolean_t b_second_field )
2064 ParseMacroblock( p_vpar, pi_mb_address, i_mb_previous, i_mb_base,
2065 1, I_CODING_TYPE, CHROMA_420,
2066 FRAME_STRUCTURE, 0 );
2069 void ParseMacroblock2P420F0( vpar_thread_t * p_vpar, int * pi_mb_address, int i_mb_previous, int i_mb_base,
2070 boolean_t b_mpeg2, int i_coding_type,
2071 int i_chroma_format, int i_structure,
2072 boolean_t b_second_field )
2074 ParseMacroblock( p_vpar, pi_mb_address, i_mb_previous, i_mb_base,
2075 1, P_CODING_TYPE, CHROMA_420,
2076 FRAME_STRUCTURE, 0 );
2079 void ParseMacroblock2B420F0( vpar_thread_t * p_vpar, int * pi_mb_address, int i_mb_previous, int i_mb_base,
2080 boolean_t b_mpeg2, int i_coding_type,
2081 int i_chroma_format, int i_structure,
2082 boolean_t b_second_field )
2084 ParseMacroblock( p_vpar, pi_mb_address, i_mb_previous, i_mb_base,
2085 1, B_CODING_TYPE, CHROMA_420,
2086 FRAME_STRUCTURE, 0 );
2090 #if (VPAR_OPTIM_LEVEL > 1)
2091 /* Optimizations for field pictures */
2092 void ParseMacroblock2I420TZ( vpar_thread_t * p_vpar, int * pi_mb_address, int i_mb_previous, int i_mb_base,
2093 boolean_t b_mpeg2, int i_coding_type,
2094 int i_chroma_format, int i_structure,
2095 boolean_t b_second_field )
2097 ParseMacroblock( p_vpar, pi_mb_address, i_mb_previous, i_mb_base,
2098 1, I_CODING_TYPE, CHROMA_420,
2099 TOP_FIELD, (p_vpar->picture.i_structure !=
2100 p_vpar->picture.i_current_structure) );
2103 void ParseMacroblock2P420TZ( vpar_thread_t * p_vpar, int * pi_mb_address, int i_mb_previous, int i_mb_base,
2104 boolean_t b_mpeg2, int i_coding_type,
2105 int i_chroma_format, int i_structure,
2106 boolean_t b_second_field )
2108 ParseMacroblock( p_vpar, pi_mb_address, i_mb_previous, i_mb_base,
2109 1, P_CODING_TYPE, CHROMA_420,
2110 TOP_FIELD, (p_vpar->picture.i_structure !=
2111 p_vpar->picture.i_current_structure) );
2114 void ParseMacroblock2B420TZ( vpar_thread_t * p_vpar, int * pi_mb_address, int i_mb_previous, int i_mb_base,
2115 boolean_t b_mpeg2, int i_coding_type,
2116 int i_chroma_format, int i_structure,
2117 boolean_t b_second_field )
2119 ParseMacroblock( p_vpar, pi_mb_address, i_mb_previous, i_mb_base,
2120 1, B_CODING_TYPE, CHROMA_420,
2121 TOP_FIELD, (p_vpar->picture.i_structure !=
2122 p_vpar->picture.i_current_structure) );
2125 void ParseMacroblock2I420BZ( vpar_thread_t * p_vpar, int * pi_mb_address, int i_mb_previous, int i_mb_base,
2126 boolean_t b_mpeg2, int i_coding_type,
2127 int i_chroma_format, int i_structure,
2128 boolean_t b_second_field )
2130 ParseMacroblock( p_vpar, pi_mb_address, i_mb_previous, i_mb_base,
2131 1, I_CODING_TYPE, CHROMA_420,
2132 BOTTOM_FIELD, (p_vpar->picture.i_structure !=
2133 p_vpar->picture.i_current_structure) );
2136 void ParseMacroblock2P420BZ( vpar_thread_t * p_vpar, int * pi_mb_address, int i_mb_previous, int i_mb_base,
2137 boolean_t b_mpeg2, int i_coding_type,
2138 int i_chroma_format, int i_structure,
2139 boolean_t b_second_field )
2141 ParseMacroblock( p_vpar, pi_mb_address, i_mb_previous, i_mb_base,
2142 1, P_CODING_TYPE, CHROMA_420,
2143 BOTTOM_FIELD, (p_vpar->picture.i_structure !=
2144 p_vpar->picture.i_current_structure) );
2147 void ParseMacroblock2B420BZ( vpar_thread_t * p_vpar, int * pi_mb_address, int i_mb_previous, int i_mb_base,
2148 boolean_t b_mpeg2, int i_coding_type,
2149 int i_chroma_format, int i_structure,
2150 boolean_t b_second_field )
2152 ParseMacroblock( p_vpar, pi_mb_address, i_mb_previous, i_mb_base,
2153 1, B_CODING_TYPE, CHROMA_420,
2154 BOTTOM_FIELD, (p_vpar->picture.i_structure !=
2155 p_vpar->picture.i_current_structure) );
2159 /*****************************************************************************
2160 * SliceHeader : Parse the next slice structure
2161 *****************************************************************************/
2162 typedef void (*f_parse_mb_t)( vpar_thread_t * p_vpar, int * pi_mb_address, int i_mb_previous, int i_mb_base,
2163 boolean_t b_mpeg2, int i_coding_type,
2164 int i_chroma_format, int i_structure,
2165 boolean_t b_second_field );
2167 static __inline__ void SliceHeader( vpar_thread_t * p_vpar,
2168 int * pi_mb_address, int i_mb_base,
2169 u32 i_vert_code, boolean_t b_high,
2170 boolean_t b_dp_scalable,
2171 boolean_t b_mpeg2, int i_coding_type,
2172 int i_chroma_format, int i_structure,
2173 boolean_t b_second_field )
2175 static f_parse_mb_t ppf_parse_mb[4][4] =
2178 NULL, NULL, NULL, NULL
2182 #if (VPAR_OPTIM_LEVEL > 1)
2183 NULL, ParseMacroblock2I420TZ, ParseMacroblock2P420TZ,
2184 ParseMacroblock2B420TZ
2186 NULL, ParseMacroblockGENERIC, ParseMacroblockGENERIC,
2187 ParseMacroblockGENERIC
2192 #if (VPAR_OPTIM_LEVEL > 1)
2193 NULL, ParseMacroblock2I420BZ, ParseMacroblock2P420BZ,
2194 ParseMacroblock2B420BZ
2196 NULL, ParseMacroblockGENERIC, ParseMacroblockGENERIC,
2197 ParseMacroblockGENERIC
2202 #if (VPAR_OPTIM_LEVEL > 0)
2203 NULL, ParseMacroblock2I420F0, ParseMacroblock2P420F0,
2204 ParseMacroblock2B420F0
2206 NULL, ParseMacroblockGENERIC, ParseMacroblockGENERIC,
2207 ParseMacroblockGENERIC
2212 int i_mb_address_save = *pi_mb_address;
2214 p_vpar->picture.b_error = 0;
2218 /* Picture with more than 2800 lines. */
2219 i_vert_code += GetBits( &p_vpar->bit_stream, 3 ) << 7;
2223 /* DATA_PARTITIONING scalability. */
2224 RemoveBits( &p_vpar->bit_stream, 7 ); /* priority_breakpoint */
2227 LoadQuantizerScale( p_vpar );
2229 if( GetBits( &p_vpar->bit_stream, 1 ) )
2231 /* intra_slice, slice_id */
2232 RemoveBits( &p_vpar->bit_stream, 8 );
2233 /* extra_information_slice */
2234 while( GetBits( &p_vpar->bit_stream, 1 ) )
2236 RemoveBits( &p_vpar->bit_stream, 8 );
2239 *pi_mb_address = (i_vert_code - 1)*p_vpar->sequence.i_mb_width;
2241 if( *pi_mb_address < i_mb_address_save )
2243 intf_ErrMsg( "vpar error: slices do not follow, maybe a PES has been trashed" );
2244 p_vpar->picture.b_error = 1;
2248 /* Reset DC coefficients predictors (ISO/IEC 13818-2 7.2.1). */
2249 p_vpar->mb.pi_dc_dct_pred[0] = p_vpar->mb.pi_dc_dct_pred[1]
2250 = p_vpar->mb.pi_dc_dct_pred[2]
2251 = 1 << (7 + p_vpar->picture.i_intra_dc_precision);
2253 /* Reset motion vector predictors (ISO/IEC 13818-2 7.6.3.4). */
2254 memset( p_vpar->mb.pppi_pmv, 0, 8*sizeof(int) );
2258 if( i_mb_address_save >= p_vpar->sequence.i_mb_size )
2260 p_vpar->picture.b_error = 1;
2264 if( p_vpar->sequence.i_chroma_format != CHROMA_420
2265 || !p_vpar->sequence.b_mpeg2 || p_vpar->sequence.i_height > 2800
2266 || p_vpar->sequence.i_scalable_mode == SC_DP )
2268 /* Weird stream. Use the slower generic function. */
2269 ParseMacroblockGENERIC( p_vpar, pi_mb_address, i_mb_address_save,
2270 i_mb_base, b_mpeg2, i_coding_type,
2271 i_chroma_format, i_structure,
2276 /* Try to find an optimized function. */
2277 if( ppf_parse_mb[i_structure]
2278 [p_vpar->picture.i_coding_type] == NULL )
2280 intf_ErrMsg( "vpar error: bad ppf_parse_mb function pointer (struct:%d, coding type:%d)",
2281 i_structure, i_coding_type );
2285 ppf_parse_mb[i_structure][i_coding_type]
2286 ( p_vpar, pi_mb_address, i_mb_address_save,
2287 i_mb_base, b_mpeg2, i_coding_type,
2288 i_chroma_format, i_structure,
2293 i_mb_address_save = *pi_mb_address;
2294 if( p_vpar->picture.b_error )
2299 while( ShowBits( &p_vpar->bit_stream, 23 )
2300 && !p_vpar->p_fifo->b_die );
2301 NextStartCode( &p_vpar->bit_stream );
2304 /*****************************************************************************
2305 * PictureData : Parse off all macroblocks (ISO/IEC 13818-2 6.2.3.7)
2306 *****************************************************************************/
2307 void vpar_PictureData( vpar_thread_t * p_vpar, int i_mb_base )
2309 int i_mb_address = 0;
2312 NextStartCode( &p_vpar->bit_stream );
2313 while( ((p_vpar->picture.i_coding_type != I_CODING_TYPE
2314 && p_vpar->picture.i_coding_type != D_CODING_TYPE)
2315 || !p_vpar->picture.b_error)
2316 && i_mb_address < (p_vpar->sequence.i_mb_size
2317 >> (p_vpar->picture.i_structure != FRAME_STRUCTURE))
2318 && !p_vpar->p_fifo->b_die )
2320 if( ((i_dummy = ShowBits( &p_vpar->bit_stream, 32 ))
2321 < SLICE_START_CODE_MIN) ||
2322 (i_dummy > SLICE_START_CODE_MAX) )
2324 intf_DbgMsg("vpar debug: premature end of picture");
2325 p_vpar->picture.b_error = 1;
2328 RemoveBits32( &p_vpar->bit_stream );
2330 /* Decode slice data. */
2331 SliceHeader( p_vpar, &i_mb_address, i_mb_base, i_dummy & 255,
2332 (p_vpar->sequence.i_height > 2800),
2333 (p_vpar->sequence.i_scalable_mode == SC_DP),
2334 p_vpar->sequence.b_mpeg2, p_vpar->picture.i_coding_type,
2335 p_vpar->sequence.i_chroma_format,
2336 p_vpar->picture.i_structure,
2337 (p_vpar->picture.i_structure !=
2338 p_vpar->picture.i_current_structure) );
2341 /* Try to recover from error. If we missed less than half the
2342 * number of macroblocks of the picture, mark the missed ones
2344 if( (p_vpar->picture.i_coding_type == P_CODING_TYPE
2345 || p_vpar->picture.i_coding_type == B_CODING_TYPE)
2346 && p_vpar->picture.b_error &&
2347 ( (i_mb_address-i_mb_base) > (p_vpar->sequence.i_mb_size >> 1)
2348 || (p_vpar->picture.i_structure != FRAME_STRUCTURE
2349 && (i_mb_address-i_mb_base) > (p_vpar->sequence.i_mb_size >> 2) ) ) )
2353 p_vpar->picture.b_error = 0;
2354 for( i_mb = i_mb_address + 1;
2355 i_mb < (p_vpar->sequence.i_mb_size
2356 << (p_vpar->picture.i_structure != FRAME_STRUCTURE));
2359 SkippedMacroblock( p_vpar, i_mb, i_mb_base,
2360 p_vpar->picture.i_coding_type,
2361 p_vpar->sequence.i_chroma_format,
2362 p_vpar->picture.i_structure,
2363 (p_vpar->picture.i_structure !=
2364 p_vpar->picture.i_current_structure) );