]> git.sesse.net Git - vlc/blob - src/video_decoder/vpar_headers.h
* Moved video_decoder's headers from include/ to src/video_decoder.
[vlc] / src / video_decoder / vpar_headers.h
1 /*****************************************************************************
2  * vpar_headers.h : video parser : headers parsing
3  *****************************************************************************
4  * Copyright (C) 1999, 2000 VideoLAN
5  * $Id: vpar_headers.h,v 1.1 2000/12/21 17:19:52 massiot Exp $
6  *
7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
8  *          Stéphane Borel <stef@via.ecp.fr>
9  *
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.
14  * 
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.
19  *
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  *****************************************************************************/
24
25 /*****************************************************************************
26  * Requires:
27  *  "config.h"
28  *  "common.h"
29  *  "mtime.h"
30  *  "threads.h"
31  *  "input.h"
32  *  "video.h"
33  *  "video_output.h"
34  *  "decoder_fifo.h"
35  *  "video_fifo.h"
36  *****************************************************************************/
37
38 /*****************************************************************************
39  * quant_matrix_t : Quantization Matrix
40  *****************************************************************************/
41 typedef struct quant_matrix_s
42 {
43     int *       pi_matrix;
44     boolean_t   b_allocated;
45                           /* Has the matrix been allocated by vpar_headers ? */
46 } quant_matrix_t;
47
48 /*****************************************************************************
49  * sequence_t : sequence descriptor
50  *****************************************************************************
51  * This structure should only be changed when reading the sequence header,
52  * or exceptionnally some extension structures (like quant_matrix).
53  *****************************************************************************/
54 typedef struct sequence_s
55 {
56     u32                 i_height, i_width;      /* height and width of the lum
57                                                  * comp of the picture       */
58     u32                 i_size;       /* total number of pel of the lum comp */
59     u32                 i_mb_height, i_mb_width, i_mb_size;
60                                             /* the same, in macroblock units */
61     unsigned int        i_aspect_ratio;        /* height/width display ratio */
62     unsigned int        i_matrix_coefficients;/* coeffs of the YUV transform */
63     int                 i_frame_rate;  /* theoritical frame rate in fps*1001 */
64     boolean_t           b_mpeg2;                                    /* guess */
65     boolean_t           b_progressive;              /* progressive (ie.
66                                                      * non-interlaced) frame */
67     unsigned int        i_scalable_mode; /* scalability ; unsupported, but
68                                           * modifies the syntax of the binary
69                                           * stream.                          */
70     quant_matrix_t      intra_quant, nonintra_quant;
71     quant_matrix_t      chroma_intra_quant, chroma_nonintra_quant;
72                                             /* current quantization matrices */
73
74     /* Chromatic information */
75     unsigned int        i_chroma_format;               /* see CHROMA_* below */
76     int                 i_chroma_nb_blocks;       /* number of chroma blocks */
77     u32                 i_chroma_width;/* width of a line of the chroma comp */
78     u32                 i_chroma_mb_width, i_chroma_mb_height;
79                                  /* size of a macroblock in the chroma buffer
80                                   * (eg. 8x8 or 8x16 or 16x16)               */
81
82     /* Parser context */
83     picture_t *         p_forward;        /* current forward reference frame */
84     picture_t *         p_backward;      /* current backward reference frame */
85
86     /* Copyright extension */
87     boolean_t           b_copyright_flag;     /* Whether the following
88                                                  information is significant
89                                                  or not. */
90     u8                  i_copyright_id;
91     boolean_t           b_original;
92     u64                 i_copyright_nb;
93 } sequence_t;
94
95 /*****************************************************************************
96  * picture_parsing_t : parser context descriptor
97  *****************************************************************************
98  * This structure should only be changed when reading the picture header.
99  *****************************************************************************/
100 typedef struct picture_parsing_s
101 {
102     /* ISO/CEI 11172-2 backward compatibility */
103     boolean_t           pb_full_pel_vector[2];
104     int                 i_forward_f_code, i_backward_f_code;
105
106     /* Values from the picture_coding_extension. Please refer to ISO/IEC
107      * 13818-2. */
108     int                 ppi_f_code[2][2];
109     int                 i_intra_dc_precision;
110     boolean_t           b_frame_pred_frame_dct, b_q_scale_type;
111     boolean_t           b_intra_vlc_format;
112     boolean_t           b_alternate_scan, b_progressive_frame;
113     boolean_t           b_top_field_first, b_concealment_mv;
114     boolean_t           b_repeat_first_field;
115     /* Relative to the current field */
116     int                 i_coding_type, i_structure;
117     boolean_t           b_frame_structure; /* i_structure == FRAME_STRUCTURE */
118
119     picture_t *         p_picture;               /* picture buffer from vout */
120     int                 i_current_structure;   /* current parsed structure of
121                                                 * p_picture (second field ?) */
122 #ifdef VDEC_SMP
123     macroblock_t *      pp_mb[MAX_MB];         /* macroblock buffer to
124                                                 * send to the vdec thread(s) */
125 #endif
126     boolean_t           b_error;            /* parsing error, try to recover */
127
128     int                 i_l_stride, i_c_stride;
129                                     /* number of coeffs to jump when changing
130                                      * lines (different with field pictures) */
131 } picture_parsing_t;
132
133 /*****************************************************************************
134  * Standard codes
135  *****************************************************************************/
136 #define PICTURE_START_CODE      0x100L
137 #define SLICE_START_CODE_MIN    0x101L
138 #define SLICE_START_CODE_MAX    0x1AFL
139 #define USER_DATA_START_CODE    0x1B2L
140 #define SEQUENCE_HEADER_CODE    0x1B3L
141 #define SEQUENCE_ERROR_CODE     0x1B4L
142 #define EXTENSION_START_CODE    0x1B5L
143 #define SEQUENCE_END_CODE       0x1B7L
144 #define GROUP_START_CODE        0x1B8L
145
146 /* extension start code IDs */
147 #define SEQUENCE_EXTENSION_ID                    1
148 #define SEQUENCE_DISPLAY_EXTENSION_ID            2
149 #define QUANT_MATRIX_EXTENSION_ID                3
150 #define COPYRIGHT_EXTENSION_ID                   4
151 #define SEQUENCE_SCALABLE_EXTENSION_ID           5
152 #define PICTURE_DISPLAY_EXTENSION_ID             7
153 #define PICTURE_CODING_EXTENSION_ID              8
154 #define PICTURE_SPATIAL_SCALABLE_EXTENSION_ID    9
155 #define PICTURE_TEMPORAL_SCALABLE_EXTENSION_ID  10
156
157 /* scalable modes */
158 #define SC_NONE     0
159 #define SC_DP       1
160 #define SC_SPAT     2
161 #define SC_SNR      3
162 #define SC_TEMP     4
163
164 /* Chroma types */
165 #define CHROMA_420 1
166 #define CHROMA_422 2
167 #define CHROMA_444 3
168
169 /* Pictures types */
170 #define I_CODING_TYPE           1
171 #define P_CODING_TYPE           2
172 #define B_CODING_TYPE           3
173 #define D_CODING_TYPE           4 /* MPEG-1 ONLY */
174 /* other values are reserved */
175
176 /* Structures */
177 #define TOP_FIELD               1
178 #define BOTTOM_FIELD            2
179 #define FRAME_STRUCTURE         3
180
181 /*****************************************************************************
182  * Prototypes
183  *****************************************************************************/
184 int vpar_NextSequenceHeader( struct vpar_thread_s * p_vpar );
185 int vpar_ParseHeader( struct vpar_thread_s * p_vpar );