1 /*****************************************************************************
2 * vpar_blocks.h : video parser blocks management
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
6 * Authors: Christophe Massiot <massiot@via.ecp.fr>
7 * Jean-Marc Dressler <polux@via.ecp.fr>
8 * Stéphane Borel <stef@via.ecp.fr>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
36 *****************************************************************************/
38 /*****************************************************************************
39 * macroblock_t : information on a macroblock passed to the video_decoder
41 *****************************************************************************/
42 typedef struct macroblock_s
44 picture_t * p_picture; /* current frame in progress */
46 int i_mb_type; /* macroblock type */
47 int i_coded_block_pattern;
48 /* which blocks are coded ? */
49 int i_chroma_nb_blocks; /* number of blocks for
50 * chroma components */
52 /* IDCT information */
53 dctelem_t ppi_blocks[12][64]; /* blocks */
54 f_idct_t pf_idct[12]; /* sparse IDCT or not ? */
55 int pi_sparse_pos[12]; /* position of the
58 /* Motion compensation information */
59 f_motion_t pf_motion; /* function to use for motion comp */
60 picture_t * p_backward; /* backward reference frame */
61 picture_t * p_forward; /* forward reference frame */
62 int ppi_field_select[2][2]; /* field to use to
64 int pppi_motion_vectors[2][2][2]; /* motion vectors */
65 int ppi_dmv[2][2]; /* differential motion vectors */
66 /* coordinates of the block in the picture */
70 int i_l_stride; /* number of yuv_data_t to
71 * ignore when changing line */
72 int i_c_stride; /* idem, for chroma */
73 boolean_t b_P_second; /* Second field of a P picture ?
74 * (used to determine the predicting
76 boolean_t b_motion_field; /* Field we are predicting
77 * (top field or bottom field) */
79 /* AddBlock information */
80 yuv_data_t * p_data[12]; /* pointer to the position
81 * in the final picture */
82 int i_addb_l_stride, i_addb_c_stride;
83 /* nb of coeffs to jump when changing lines */
86 /*****************************************************************************
87 * macroblock_parsing_t : macroblock context & predictors
88 *****************************************************************************/
91 unsigned char i_quantizer_scale; /* scale of the quantization
93 int pi_dc_dct_pred[3]; /* ISO/IEC 13818-2 7.2.1 */
94 int pppi_pmv[2][2][2]; /* Motion vect predictors, 7.6.3 */
95 int i_motion_dir;/* Used for the next skipped macroblock */
97 /* Context used to optimize block parsing */
98 int i_motion_type, i_mv_count, i_mv_format;
99 boolean_t b_dmv, b_dct_type;
101 /* Coordinates of the upper-left pixel of the macroblock, in lum and
103 int i_l_x, i_l_y, i_c_x, i_c_y;
104 } macroblock_parsing_t;
106 /*****************************************************************************
107 * lookup_t : entry type for lookup tables *
108 *****************************************************************************/
109 typedef struct lookup_s
115 /*****************************************************************************
116 * ac_lookup_t : special entry type for lookup tables about ac coefficients
117 *****************************************************************************/
118 typedef struct dct_lookup_s
125 /*****************************************************************************
127 *****************************************************************************/
128 /* Macroblock types */
131 #define MB_MOTION_BACKWARD 4
132 #define MB_MOTION_FORWARD 8
136 #define MOTION_FIELD 1
137 #define MOTION_FRAME 2
138 #define MOTION_16X8 2
141 /* Macroblock Address Increment types */
142 #define MB_ADDRINC_ESCAPE 8
143 #define MB_ADDRINC_STUFFING 15
145 /* Error constant for lookup tables */
146 #define MB_ERROR (-1)
149 #define SCAN_ZIGZAG 0
152 /* Constant for block decoding */
154 #define DCT_ESCAPE 65
156 /*****************************************************************************
158 *****************************************************************************/
159 extern int pi_default_intra_quant[];
160 extern int pi_default_nonintra_quant[];
161 extern u8 pi_scan[2][64];
163 /*****************************************************************************
165 *****************************************************************************/
166 void vpar_InitCrop( struct vpar_thread_s* p_vpar );
167 void vpar_InitMbAddrInc( struct vpar_thread_s * p_vpar );
168 void vpar_InitPMBType( struct vpar_thread_s * p_vpar );
169 void vpar_InitBMBType( struct vpar_thread_s * p_vpar );
170 void vpar_InitCodedPattern( struct vpar_thread_s * p_vpar );
171 void vpar_InitDCTTables( struct vpar_thread_s * p_vpar );
172 void vpar_PictureData( struct vpar_thread_s * p_vpar, int i_mb_base );