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
|
/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_CBS_MPEG2_H
#define AVCODEC_CBS_MPEG2_H
#include <stddef.h>
#include <stdint.h>
#include "libavutil/buffer.h"
enum {
MPEG2_START_PICTURE = 0x00,
MPEG2_START_SLICE_MIN = 0x01,
MPEG2_START_SLICE_MAX = 0xaf,
MPEG2_START_USER_DATA = 0xb2,
MPEG2_START_SEQUENCE_HEADER = 0xb3,
MPEG2_START_SEQUENCE_ERROR = 0xb4,
MPEG2_START_EXTENSION = 0xb5,
MPEG2_START_SEQUENCE_END = 0xb7,
MPEG2_START_GROUP = 0xb8,
};
#define MPEG2_START_IS_SLICE(type) \
((type) >= MPEG2_START_SLICE_MIN && \
(type) <= MPEG2_START_SLICE_MAX)
enum {
MPEG2_EXTENSION_SEQUENCE = 0x1,
MPEG2_EXTENSION_SEQUENCE_DISPLAY = 0x2,
MPEG2_EXTENSION_QUANT_MATRIX = 0x3,
MPEG2_EXTENSION_COPYRIGHT = 0x4,
MPEG2_EXTENSION_SEQUENCE_SCALABLE = 0x5,
MPEG2_EXTENSION_PICTURE_DISPLAY = 0x7,
MPEG2_EXTENSION_PICTURE_CODING = 0x8,
MPEG2_EXTENSION_PICTURE_SPATIAL_SCALABLE = 0x9,
MPEG2_EXTENSION_PICTURE_TEMPORAL_SCALABLE = 0xa,
MPEG2_EXTENSION_CAMERA_PARAMETERS = 0xb,
MPEG2_EXTENSION_ITU_T = 0xc,
};
typedef struct MPEG2RawSequenceHeader {
uint8_t sequence_header_code;
uint16_t horizontal_size_value;
uint16_t vertical_size_value;
uint8_t aspect_ratio_information;
uint8_t frame_rate_code;
uint32_t bit_rate_value;
uint16_t vbv_buffer_size_value;
uint8_t constrained_parameters_flag;
uint8_t load_intra_quantiser_matrix;
uint8_t intra_quantiser_matrix[64];
uint8_t load_non_intra_quantiser_matrix;
uint8_t non_intra_quantiser_matrix[64];
} MPEG2RawSequenceHeader;
typedef struct MPEG2RawUserData {
uint8_t user_data_start_code;
uint8_t *user_data;
size_t user_data_length;
AVBufferRef *user_data_ref;
} MPEG2RawUserData;
typedef struct MPEG2RawSequenceExtension {
uint8_t profile_and_level_indication;
uint8_t progressive_sequence;
uint8_t chroma_format;
uint8_t horizontal_size_extension;
uint8_t vertical_size_extension;
uint16_t bit_rate_extension;
uint8_t vbv_buffer_size_extension;
uint8_t low_delay;
uint8_t frame_rate_extension_n;
uint8_t frame_rate_extension_d;
} MPEG2RawSequenceExtension;
typedef struct MPEG2RawSequenceDisplayExtension {
uint8_t video_format;
uint8_t colour_description;
uint8_t colour_primaries;
uint8_t transfer_characteristics;
uint8_t matrix_coefficients;
uint16_t display_horizontal_size;
uint16_t display_vertical_size;
} MPEG2RawSequenceDisplayExtension;
typedef struct MPEG2RawGroupOfPicturesHeader {
uint8_t group_start_code;
uint32_t time_code;
uint8_t closed_gop;
uint8_t broken_link;
} MPEG2RawGroupOfPicturesHeader;
typedef struct MPEG2RawExtraInformation {
uint8_t *extra_information;
AVBufferRef *extra_information_ref;
size_t extra_information_length;
} MPEG2RawExtraInformation;
typedef struct MPEG2RawPictureHeader {
uint8_t picture_start_code;
uint16_t temporal_reference;
uint8_t picture_coding_type;
uint16_t vbv_delay;
uint8_t full_pel_forward_vector;
uint8_t forward_f_code;
uint8_t full_pel_backward_vector;
uint8_t backward_f_code;
MPEG2RawExtraInformation extra_information_picture;
} MPEG2RawPictureHeader;
typedef struct MPEG2RawPictureCodingExtension {
uint8_t f_code[2][2];
uint8_t intra_dc_precision;
uint8_t picture_structure;
uint8_t top_field_first;
uint8_t frame_pred_frame_dct;
uint8_t concealment_motion_vectors;
uint8_t q_scale_type;
uint8_t intra_vlc_format;
uint8_t alternate_scan;
uint8_t repeat_first_field;
uint8_t chroma_420_type;
uint8_t progressive_frame;
uint8_t composite_display_flag;
uint8_t v_axis;
uint8_t field_sequence;
uint8_t sub_carrier;
uint8_t burst_amplitude;
uint8_t sub_carrier_phase;
} MPEG2RawPictureCodingExtension;
typedef struct MPEG2RawQuantMatrixExtension {
uint8_t load_intra_quantiser_matrix;
uint8_t intra_quantiser_matrix[64];
uint8_t load_non_intra_quantiser_matrix;
uint8_t non_intra_quantiser_matrix[64];
uint8_t load_chroma_intra_quantiser_matrix;
uint8_t chroma_intra_quantiser_matrix[64];
uint8_t load_chroma_non_intra_quantiser_matrix;
uint8_t chroma_non_intra_quantiser_matrix[64];
} MPEG2RawQuantMatrixExtension;
typedef struct MPEG2RawPictureDisplayExtension {
int16_t frame_centre_horizontal_offset[3];
int16_t frame_centre_vertical_offset[3];
} MPEG2RawPictureDisplayExtension;
typedef struct MPEG2RawExtensionData {
uint8_t extension_start_code;
uint8_t extension_start_code_identifier;
union {
MPEG2RawSequenceExtension sequence;
MPEG2RawSequenceDisplayExtension sequence_display;
MPEG2RawQuantMatrixExtension quant_matrix;
MPEG2RawPictureCodingExtension picture_coding;
MPEG2RawPictureDisplayExtension picture_display;
} data;
} MPEG2RawExtensionData;
typedef struct MPEG2RawSliceHeader {
uint8_t slice_vertical_position;
uint8_t slice_vertical_position_extension;
uint8_t priority_breakpoint;
uint8_t quantiser_scale_code;
uint8_t slice_extension_flag;
uint8_t intra_slice;
uint8_t slice_picture_id_enable;
uint8_t slice_picture_id;
MPEG2RawExtraInformation extra_information_slice;
} MPEG2RawSliceHeader;
typedef struct MPEG2RawSlice {
MPEG2RawSliceHeader header;
uint8_t *data;
size_t data_size;
int data_bit_start;
AVBufferRef *data_ref;
} MPEG2RawSlice;
typedef struct MPEG2RawSequenceEnd {
uint8_t sequence_end_code;
} MPEG2RawSequenceEnd;
typedef struct CodedBitstreamMPEG2Context {
// Elements stored in headers which are required for other decoding.
uint16_t horizontal_size;
uint16_t vertical_size;
uint8_t scalable;
uint8_t scalable_mode;
uint8_t progressive_sequence;
uint8_t number_of_frame_centre_offsets;
// Write buffer.
uint8_t *write_buffer;
size_t write_buffer_size;
} CodedBitstreamMPEG2Context;
#endif /* AVCODEC_CBS_MPEG2_H */
|
