A modern Music Player Daemon based on Rockbox open source high quality audio player
tsiry-sandratraina.com
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/*
2 * mpeg2_internal.h
3 * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
4 * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
5 *
6 * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
7 * See http://libmpeg2.sourceforge.net/ for updates.
8 *
9 * mpeg2dec is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * mpeg2dec is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * $Id$
24 * libmpeg2 sync history:
25 * 2008-07-01 - CVS revision 1.89
26 */
27#ifndef MPEG2_INTERNAL_H
28#define MPEG2_INTERNAL_H
29
30#include "config.h" /* for Rockbox CPU_ #defines */
31
32/* macroblock modes */
33#define MACROBLOCK_INTRA 1
34#define MACROBLOCK_PATTERN 2
35#define MACROBLOCK_MOTION_BACKWARD 4
36#define MACROBLOCK_MOTION_FORWARD 8
37#define MACROBLOCK_QUANT 16
38#define DCT_TYPE_INTERLACED 32
39/* motion_type */
40#define MOTION_TYPE_SHIFT 6
41#define MC_FIELD 1
42#define MC_FRAME 2
43#define MC_16X8 2
44#define MC_DMV 3
45
46/* picture structure */
47#define TOP_FIELD 1
48#define BOTTOM_FIELD 2
49#define FRAME_PICTURE 3
50
51/* picture coding type */
52#define I_TYPE 1
53#define P_TYPE 2
54#define B_TYPE 3
55#define D_TYPE 4
56
57typedef void mpeg2_mc_fct (uint8_t *, const uint8_t *, int, int);
58
59typedef struct
60{
61 uint8_t * ref[2][MPEG2_COMPONENTS];
62 uint8_t ** ref2[2];
63 int pmv[2][2];
64 int f_code[2];
65} motion_t;
66
67typedef void motion_parser_t(mpeg2_decoder_t * decoder,
68 motion_t * motion,
69 mpeg2_mc_fct * const * table);
70
71struct mpeg2_decoder_s
72{
73 /* first, state that carries information from one macroblock to the */
74 /* next inside a slice, and is never used outside of mpeg2_slice() */
75
76 /* bit parsing stuff */
77 uint32_t bitstream_buf; /* current 32 bit working set */
78 int bitstream_bits; /* used bits in working set */
79 const uint8_t * bitstream_ptr; /* buffer with stream data */
80
81 uint8_t * dest[MPEG2_COMPONENTS];
82
83 int offset;
84 int stride;
85 int uv_stride;
86 int slice_stride;
87 int slice_uv_stride;
88 int stride_frame;
89 unsigned int limit_x;
90 unsigned int limit_y_16;
91 unsigned int limit_y_8;
92 unsigned int limit_y;
93
94 /* Motion vectors */
95 /* The f_ and b_ correspond to the forward and backward motion */
96 /* predictors */
97 motion_t b_motion;
98 motion_t f_motion;
99 motion_parser_t * motion_parser[5];
100
101 /* predictor for DC coefficients in intra blocks */
102 int16_t dc_dct_pred[MPEG2_COMPONENTS];
103
104 /* DCT coefficients */
105 int16_t * DCTblock; /* put buffer separately to have it in IRAM */
106
107 uint8_t * picture_dest[MPEG2_COMPONENTS];
108 void (* convert) (void * convert_id, uint8_t * const * src,
109 unsigned int v_offset);
110 void * convert_id;
111
112 int dmv_offset;
113 unsigned int v_offset;
114
115 /* now non-slice-specific information */
116
117 /* sequence header stuff */
118 uint16_t * quantizer_matrix[4];
119 uint16_t (* chroma_quantizer[2])[64];
120 uint16_t quantizer_prescale[4][32][64];
121
122 /* The width and height of the picture snapped to macroblock units */
123 int width;
124 int height;
125 int vertical_position_extension;
126 int chroma_format;
127
128 /* picture header stuff */
129
130 /* what type of picture this is (I, P, B, D) */
131 int coding_type;
132
133 /* picture coding extension stuff */
134
135 /* quantization factor for intra dc coefficients */
136 int intra_dc_precision;
137 /* top/bottom/both fields */
138 int picture_structure;
139 /* bool to indicate all predictions are frame based */
140 int frame_pred_frame_dct;
141 /* bool to indicate whether intra blocks have motion vectors */
142 /* (for concealment) */
143 int concealment_motion_vectors;
144 /* bool to use different vlc tables */
145 int intra_vlc_format;
146 /* used for DMV MC */
147 int top_field_first;
148
149 /* stuff derived from bitstream */
150
151 /* pointer to the zigzag scan we're supposed to be using */
152 const uint8_t * scan;
153
154 int second_field;
155
156 int mpeg1;
157};
158
159typedef struct
160{
161 mpeg2_fbuf_t fbuf;
162} fbuf_alloc_t;
163
164struct mpeg2dec_s
165{
166 mpeg2_decoder_t decoder;
167
168 mpeg2_info_t info;
169
170 uint32_t shift;
171 int is_display_initialized;
172 mpeg2_state_t (* action) (struct mpeg2dec_s * mpeg2dec);
173 mpeg2_state_t state;
174 uint32_t ext_state;
175
176 /* allocated in init - gcc has problems allocating such big structures */
177 uint8_t * ATTR_ALIGN(4) chunk_buffer;
178 /* pointer to start of the current chunk */
179 uint8_t * chunk_start;
180 /* pointer to current position in chunk_buffer */
181 uint8_t * chunk_ptr;
182 /* last start code ? */
183 uint8_t code;
184
185 /* picture tags */
186 uint32_t tag_current, tag2_current, tag_previous, tag2_previous;
187 int num_tags;
188 int bytes_since_tag;
189
190 int first;
191 int alloc_index_user;
192 int alloc_index;
193 uint8_t first_decode_slice;
194 uint8_t nb_decode_slices;
195
196 unsigned int user_data_len;
197
198 mpeg2_sequence_t new_sequence;
199 mpeg2_sequence_t sequence;
200 mpeg2_gop_t new_gop;
201 mpeg2_gop_t gop;
202 mpeg2_picture_t new_picture;
203 mpeg2_picture_t pictures[4];
204 mpeg2_picture_t * picture;
205 /*const*/ mpeg2_fbuf_t * fbuf[3]; /* 0: current fbuf, 1-2: prediction fbufs */
206
207 fbuf_alloc_t fbuf_alloc[3];
208 int custom_fbuf;
209
210 uint8_t * yuv_buf[3][MPEG2_COMPONENTS];
211 int yuv_index;
212 mpeg2_convert_t * convert;
213 void * convert_arg;
214 unsigned int convert_id_size;
215 int convert_stride;
216 void (* convert_start) (void * id, const mpeg2_fbuf_t * fbuf,
217 const mpeg2_picture_t * picture,
218 const mpeg2_gop_t * gop);
219
220 uint8_t * buf_start;
221 uint8_t * buf_end;
222
223 int16_t display_offset_x, display_offset_y;
224
225 int copy_matrix;
226 int8_t q_scale_type, scaled[4];
227 uint8_t quantizer_matrix[4][64];
228 uint8_t new_quantizer_matrix[4][64];
229};
230
231/* decode.c */
232mpeg2_state_t mpeg2_seek_header (mpeg2dec_t * mpeg2dec);
233mpeg2_state_t mpeg2_parse_header (mpeg2dec_t * mpeg2dec);
234
235/* header.c */
236void mpeg2_header_state_init (mpeg2dec_t * mpeg2dec);
237void mpeg2_reset_info (mpeg2_info_t * info);
238int mpeg2_header_sequence (mpeg2dec_t * mpeg2dec);
239int mpeg2_header_gop (mpeg2dec_t * mpeg2dec);
240int mpeg2_header_picture (mpeg2dec_t * mpeg2dec);
241int mpeg2_header_extension (mpeg2dec_t * mpeg2dec);
242int mpeg2_header_user_data (mpeg2dec_t * mpeg2dec);
243void mpeg2_header_sequence_finalize (mpeg2dec_t * mpeg2dec);
244void mpeg2_header_gop_finalize (mpeg2dec_t * mpeg2dec);
245void mpeg2_header_picture_finalize (mpeg2dec_t * mpeg2dec);
246mpeg2_state_t mpeg2_header_slice_start (mpeg2dec_t * mpeg2dec);
247mpeg2_state_t mpeg2_header_end (mpeg2dec_t * mpeg2dec);
248void mpeg2_set_fbuf (mpeg2dec_t * mpeg2dec, int b_type);
249
250/* idct.c */
251void mpeg2_idct_init (void);
252void mpeg2_idct_copy(int16_t * block, uint8_t * dest,
253 const int stride);
254void mpeg2_idct_add(const int last, int16_t * block,
255 uint8_t * dest, const int stride);
256
257extern const uint8_t default_mpeg2_scan_norm[64];
258extern const uint8_t default_mpeg2_scan_alt[64];
259extern uint8_t mpeg2_scan_norm[64];
260extern uint8_t mpeg2_scan_alt[64];
261
262/* motion_comp.c */
263void mpeg2_mc_init (void);
264
265typedef struct
266{
267 mpeg2_mc_fct * put [8];
268 mpeg2_mc_fct * avg [8];
269} mpeg2_mc_t;
270
271extern const mpeg2_mc_t mpeg2_mc;
272
273#endif /* MPEG2_INTERNAL_H */
274