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
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2019 Pengutronix, Michael Tretter <kernel@pengutronix.de>
*
* Convert NAL units between raw byte sequence payloads (RBSP) and C structs.
*/
#ifndef __NAL_H264_H__
#define __NAL_H264_H__
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/v4l2-controls.h>
#include <linux/videodev2.h>
/*
* struct nal_h264_hrd_parameters - HRD parameters
*
* C struct representation of the sequence parameter set NAL unit as defined by
* Rec. ITU-T H.264 (04/2017) E.1.2 HRD parameters syntax.
*/
struct nal_h264_hrd_parameters {
unsigned int cpb_cnt_minus1;
unsigned int bit_rate_scale;
unsigned int cpb_size_scale;
struct {
int bit_rate_value_minus1[16];
int cpb_size_value_minus1[16];
unsigned int cbr_flag[16];
};
unsigned int initial_cpb_removal_delay_length_minus1;
unsigned int cpb_removal_delay_length_minus1;
unsigned int dpb_output_delay_length_minus1;
unsigned int time_offset_length;
};
/*
* struct nal_h264_vui_parameters - VUI parameters
*
* C struct representation of the VUI parameters as defined by Rec. ITU-T
* H.264 (04/2017) E.1.1 VUI parameters syntax.
*/
struct nal_h264_vui_parameters {
unsigned int aspect_ratio_info_present_flag;
struct {
unsigned int aspect_ratio_idc;
unsigned int sar_width;
unsigned int sar_height;
};
unsigned int overscan_info_present_flag;
unsigned int overscan_appropriate_flag;
unsigned int video_signal_type_present_flag;
struct {
unsigned int video_format;
unsigned int video_full_range_flag;
unsigned int colour_description_present_flag;
struct {
unsigned int colour_primaries;
unsigned int transfer_characteristics;
unsigned int matrix_coefficients;
};
};
unsigned int chroma_loc_info_present_flag;
struct {
unsigned int chroma_sample_loc_type_top_field;
unsigned int chroma_sample_loc_type_bottom_field;
};
unsigned int timing_info_present_flag;
struct {
unsigned int num_units_in_tick;
unsigned int time_scale;
unsigned int fixed_frame_rate_flag;
};
unsigned int nal_hrd_parameters_present_flag;
struct nal_h264_hrd_parameters nal_hrd_parameters;
unsigned int vcl_hrd_parameters_present_flag;
struct nal_h264_hrd_parameters vcl_hrd_parameters;
unsigned int low_delay_hrd_flag;
unsigned int pic_struct_present_flag;
unsigned int bitstream_restriction_flag;
struct {
unsigned int motion_vectors_over_pic_boundaries_flag;
unsigned int max_bytes_per_pic_denom;
unsigned int max_bits_per_mb_denom;
unsigned int log2_max_mv_length_horizontal;
unsigned int log21_max_mv_length_vertical;
unsigned int max_num_reorder_frames;
unsigned int max_dec_frame_buffering;
};
};
/*
* struct nal_h264_sps - Sequence parameter set
*
* C struct representation of the sequence parameter set NAL unit as defined by
* Rec. ITU-T H.264 (04/2017) 7.3.2.1.1 Sequence parameter set data syntax.
*/
struct nal_h264_sps {
unsigned int profile_idc;
unsigned int constraint_set0_flag;
unsigned int constraint_set1_flag;
unsigned int constraint_set2_flag;
unsigned int constraint_set3_flag;
unsigned int constraint_set4_flag;
unsigned int constraint_set5_flag;
unsigned int reserved_zero_2bits;
unsigned int level_idc;
unsigned int seq_parameter_set_id;
struct {
unsigned int chroma_format_idc;
unsigned int separate_colour_plane_flag;
unsigned int bit_depth_luma_minus8;
unsigned int bit_depth_chroma_minus8;
unsigned int qpprime_y_zero_transform_bypass_flag;
unsigned int seq_scaling_matrix_present_flag;
};
unsigned int log2_max_frame_num_minus4;
unsigned int pic_order_cnt_type;
union {
unsigned int log2_max_pic_order_cnt_lsb_minus4;
struct {
unsigned int delta_pic_order_always_zero_flag;
int offset_for_non_ref_pic;
int offset_for_top_to_bottom_field;
unsigned int num_ref_frames_in_pic_order_cnt_cycle;
int offset_for_ref_frame[255];
};
};
unsigned int max_num_ref_frames;
unsigned int gaps_in_frame_num_value_allowed_flag;
unsigned int pic_width_in_mbs_minus1;
unsigned int pic_height_in_map_units_minus1;
unsigned int frame_mbs_only_flag;
unsigned int mb_adaptive_frame_field_flag;
unsigned int direct_8x8_inference_flag;
unsigned int frame_cropping_flag;
struct {
unsigned int crop_left;
unsigned int crop_right;
unsigned int crop_top;
unsigned int crop_bottom;
};
unsigned int vui_parameters_present_flag;
struct nal_h264_vui_parameters vui;
};
/*
* struct nal_h264_pps - Picture parameter set
*
* C struct representation of the picture parameter set NAL unit as defined by
* Rec. ITU-T H.264 (04/2017) 7.3.2.2 Picture parameter set RBSP syntax.
*/
struct nal_h264_pps {
unsigned int pic_parameter_set_id;
unsigned int seq_parameter_set_id;
unsigned int entropy_coding_mode_flag;
unsigned int bottom_field_pic_order_in_frame_present_flag;
unsigned int num_slice_groups_minus1;
unsigned int slice_group_map_type;
union {
unsigned int run_length_minus1[8];
struct {
unsigned int top_left[8];
unsigned int bottom_right[8];
};
struct {
unsigned int slice_group_change_direction_flag;
unsigned int slice_group_change_rate_minus1;
};
struct {
unsigned int pic_size_in_map_units_minus1;
unsigned int slice_group_id[8];
};
};
unsigned int num_ref_idx_l0_default_active_minus1;
unsigned int num_ref_idx_l1_default_active_minus1;
unsigned int weighted_pred_flag;
unsigned int weighted_bipred_idc;
int pic_init_qp_minus26;
int pic_init_qs_minus26;
int chroma_qp_index_offset;
unsigned int deblocking_filter_control_present_flag;
unsigned int constrained_intra_pred_flag;
unsigned int redundant_pic_cnt_present_flag;
struct {
unsigned int transform_8x8_mode_flag;
unsigned int pic_scaling_matrix_present_flag;
int second_chroma_qp_index_offset;
};
};
/**
* nal_h264_profile() - Get profile_idc for v4l2 h264 profile
* @profile: the profile as &enum v4l2_mpeg_video_h264_profile
*
* Convert the &enum v4l2_mpeg_video_h264_profile to profile_idc as specified
* in Rec. ITU-T H.264 (04/2017) A.2.
*
* Return: the profile_idc for the passed level
*/
static inline int nal_h264_profile(enum v4l2_mpeg_video_h264_profile profile)
{
switch (profile) {
case V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE:
return 66;
case V4L2_MPEG_VIDEO_H264_PROFILE_MAIN:
return 77;
case V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED:
return 88;
case V4L2_MPEG_VIDEO_H264_PROFILE_HIGH:
return 100;
default:
return -EINVAL;
}
}
/**
* nal_h264_level() - Get level_idc for v4l2 h264 level
* @level: the level as &enum v4l2_mpeg_video_h264_level
*
* Convert the &enum v4l2_mpeg_video_h264_level to level_idc as specified in
* Rec. ITU-T H.264 (04/2017) A.3.2.
*
* Return: the level_idc for the passed level
*/
static inline int nal_h264_level(enum v4l2_mpeg_video_h264_level level)
{
switch (level) {
case V4L2_MPEG_VIDEO_H264_LEVEL_1_0:
return 10;
case V4L2_MPEG_VIDEO_H264_LEVEL_1B:
return 9;
case V4L2_MPEG_VIDEO_H264_LEVEL_1_1:
return 11;
case V4L2_MPEG_VIDEO_H264_LEVEL_1_2:
return 12;
case V4L2_MPEG_VIDEO_H264_LEVEL_1_3:
return 13;
case V4L2_MPEG_VIDEO_H264_LEVEL_2_0:
return 20;
case V4L2_MPEG_VIDEO_H264_LEVEL_2_1:
return 21;
case V4L2_MPEG_VIDEO_H264_LEVEL_2_2:
return 22;
case V4L2_MPEG_VIDEO_H264_LEVEL_3_0:
return 30;
case V4L2_MPEG_VIDEO_H264_LEVEL_3_1:
return 31;
case V4L2_MPEG_VIDEO_H264_LEVEL_3_2:
return 32;
case V4L2_MPEG_VIDEO_H264_LEVEL_4_0:
return 40;
case V4L2_MPEG_VIDEO_H264_LEVEL_4_1:
return 41;
case V4L2_MPEG_VIDEO_H264_LEVEL_4_2:
return 42;
case V4L2_MPEG_VIDEO_H264_LEVEL_5_0:
return 50;
case V4L2_MPEG_VIDEO_H264_LEVEL_5_1:
return 51;
default:
return -EINVAL;
}
}
ssize_t nal_h264_write_sps(const struct device *dev,
void *dest, size_t n, struct nal_h264_sps *sps);
ssize_t nal_h264_read_sps(const struct device *dev,
struct nal_h264_sps *sps, void *src, size_t n);
void nal_h264_print_sps(const struct device *dev, struct nal_h264_sps *sps);
ssize_t nal_h264_write_pps(const struct device *dev,
void *dest, size_t n, struct nal_h264_pps *pps);
ssize_t nal_h264_read_pps(const struct device *dev,
struct nal_h264_pps *pps, void *src, size_t n);
void nal_h264_print_pps(const struct device *dev, struct nal_h264_pps *pps);
ssize_t nal_h264_write_filler(const struct device *dev, void *dest, size_t n);
ssize_t nal_h264_read_filler(const struct device *dev, void *src, size_t n);
#endif /* __NAL_H264_H__ */
|
