1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/*
* mpeg2_internal.h
* Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
*
* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
* See http://libmpeg2.sourceforge.net/ for updates.
*
* mpeg2dec is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpeg2dec is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* macroblock modes */
#define MACROBLOCK_INTRA 1
#define MACROBLOCK_PATTERN 2
#define MACROBLOCK_MOTION_BACKWARD 4
#define MACROBLOCK_MOTION_FORWARD 8
#define MACROBLOCK_QUANT 16
#define DCT_TYPE_INTERLACED 32
/* motion_type */
#define MOTION_TYPE_MASK (3*64)
#define MOTION_TYPE_BASE 64
#define MC_FIELD (1*64)
#define MC_FRAME (2*64)
#define MC_16X8 (2*64)
#define MC_DMV (3*64)
/* picture structure */
#define TOP_FIELD 1
#define BOTTOM_FIELD 2
#define FRAME_PICTURE 3
/* picture coding type */
#define I_TYPE 1
#define P_TYPE 2
#define B_TYPE 3
#define D_TYPE 4
typedef struct motion_s {
uint8_t * ref[2][3];
uint8_t ** ref2[2];
int pmv[2][2];
int f_code[2];
} motion_t;
typedef struct picture_s {
/* first, state that carries information from one macroblock to the */
/* next inside a slice, and is never used outside of mpeg2_slice() */
/* DCT coefficients - should be kept aligned ! */
int16_t DCTblock[64];
/* bit parsing stuff */
uint32_t bitstream_buf; /* current 32 bit working set of buffer */
int bitstream_bits; /* used bits in working set */
uint8_t * bitstream_ptr; /* buffer with stream data */
uint8_t * dest[3];
int pitches[3];
int offset;
unsigned int limit_x;
unsigned int limit_y_16;
unsigned int limit_y_8;
unsigned int limit_y;
/* Motion vectors */
/* The f_ and b_ correspond to the forward and backward motion */
/* predictors */
motion_t b_motion;
motion_t f_motion;
/* predictor for DC coefficients in intra blocks */
int16_t dc_dct_pred[3];
int quantizer_scale; /* remove */
int current_field; /* remove */
int dmv_offset; /* remove */
unsigned int v_offset; /* remove */
/* now non-slice-specific information */
/* sequence header stuff */
uint8_t intra_quantizer_matrix [64];
uint8_t non_intra_quantizer_matrix [64];
/* The width and height of the picture snapped to macroblock units */
int coded_picture_width;
int coded_picture_height;
/* picture header stuff */
/* what type of picture this is (I, P, B, D) */
int picture_coding_type;
int vbv_delay;
int low_delay;
/* picture coding extension stuff */
/* quantization factor for intra dc coefficients */
int intra_dc_precision;
/* top/bottom/both fields */
int picture_structure;
/* bool to indicate all predictions are frame based */
int frame_pred_frame_dct;
/* bool to indicate whether intra blocks have motion vectors */
/* (for concealment) */
int concealment_motion_vectors;
/* bit to indicate which quantization table to use */
int q_scale_type;
/* bool to use different vlc tables */
int intra_vlc_format;
/* used for DMV MC */
int top_field_first;
/* stuff derived from bitstream */
/* pointer to the zigzag scan we're supposed to be using */
uint8_t * scan;
struct vo_frame_s * current_frame;
struct vo_frame_s * forward_reference_frame;
struct vo_frame_s * backward_reference_frame;
int frame_width, frame_height;
int second_field;
int mpeg1;
int skip_non_intra_dct;
/* these things are not needed by the decoder */
/* this is a temporary interface, we will build a better one later. */
int aspect_ratio_information;
int frame_rate_code;
int progressive_sequence;
int repeat_first_field;
int progressive_frame;
uint32_t frame_centre_horizontal_offset;
uint32_t frame_centre_vertical_offset;
uint32_t video_format;
uint32_t colour_description;
uint32_t colour_primatives;
uint32_t transfer_characteristics;
uint32_t matrix_coefficients;
uint32_t display_horizontal_size;
uint32_t display_vertical_size;
uint32_t drop_frame_flag;
uint32_t time_code_hours;
uint32_t time_code_minutes;
uint32_t time_code_seconds;
uint32_t time_code_pictures;
uint32_t closed_gop;
uint32_t broken_link;
int bitrate;
int frame_rate_ext_n;
int frame_rate_ext_d;
} picture_t;
typedef struct cpu_state_s {
#ifdef ARCH_PPC
uint8_t regv[12*16];
#endif
int dummy;
} cpu_state_t;
/* cpu_state.c */
void mpeg2_cpu_state_init (uint32_t mm_accel);
/* header.c */
void mpeg2_header_state_init (picture_t * picture);
int mpeg2_header_picture (picture_t * picture, uint8_t * buffer);
int mpeg2_header_sequence (picture_t * picture, uint8_t * buffer);
int mpeg2_header_extension (picture_t * picture, uint8_t * buffer);
int mpeg2_header_group_of_pictures (picture_t * picture, uint8_t * buffer);
/* idct.c */
void mpeg2_idct_init (uint32_t mm_accel);
/* idct_mlib.c */
void mpeg2_idct_add_mlib (int16_t * block, uint8_t * dest, int stride);
void mpeg2_idct_copy_mlib_non_ieee (int16_t * block, uint8_t * dest,
int stride);
void mpeg2_idct_add_mlib_non_ieee (int16_t * block, uint8_t * dest,
int stride);
/* idct_mmx.c */
void mpeg2_idct_copy_mmxext (int16_t * block, uint8_t * dest, int stride);
void mpeg2_idct_add_mmxext (int16_t * block, uint8_t * dest, int stride);
void mpeg2_idct_copy_mmx (int16_t * block, uint8_t * dest, int stride);
void mpeg2_idct_add_mmx (int16_t * block, uint8_t * dest, int stride);
void mpeg2_idct_mmx_init (void);
/* idct_altivec.c */
void mpeg2_idct_copy_altivec (int16_t * block, uint8_t * dest, int stride);
void mpeg2_idct_add_altivec (int16_t * block, uint8_t * dest, int stride);
void mpeg2_idct_altivec_init (void);
/* motion_comp.c */
void mpeg2_mc_init (uint32_t mm_accel);
typedef struct mpeg2_mc_s {
void (* put [8]) (uint8_t * dst, uint8_t *, int32_t, int32_t);
void (* avg [8]) (uint8_t * dst, uint8_t *, int32_t, int32_t);
} mpeg2_mc_t;
#define MPEG2_MC_EXTERN(x) mpeg2_mc_t mpeg2_mc_##x = { \
{MC_put_o_16_##x, MC_put_x_16_##x, MC_put_y_16_##x, MC_put_xy_16_##x, \
MC_put_o_8_##x, MC_put_x_8_##x, MC_put_y_8_##x, MC_put_xy_8_##x}, \
{MC_avg_o_16_##x, MC_avg_x_16_##x, MC_avg_y_16_##x, MC_avg_xy_16_##x, \
MC_avg_o_8_##x, MC_avg_x_8_##x, MC_avg_y_8_##x, MC_avg_xy_8_##x} \
};
extern mpeg2_mc_t mpeg2_mc_c;
extern mpeg2_mc_t mpeg2_mc_mmx;
extern mpeg2_mc_t mpeg2_mc_mmxext;
extern mpeg2_mc_t mpeg2_mc_3dnow;
extern mpeg2_mc_t mpeg2_mc_altivec;
extern mpeg2_mc_t mpeg2_mc_mlib;
/* slice.c */
void mpeg2_slice (picture_t * picture, int code, uint8_t * buffer);
/* stats.c */
void mpeg2_stats (int code, uint8_t * buffer);
|
