FFmpeg
h264_ps.h
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2  * This file is part of FFmpeg.
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5  * modify it under the terms of the GNU Lesser General Public
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12  * Lesser General Public License for more details.
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16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 /**
20  * @file
21  * H.264 parameter set handling
22  */
23 
24 #ifndef AVCODEC_H264_PS_H
25 #define AVCODEC_H264_PS_H
26 
27 #include <stdint.h>
28 
29 #include "libavutil/buffer.h"
30 #include "libavutil/pixfmt.h"
31 #include "libavutil/rational.h"
32 
33 #include "avcodec.h"
34 #include "get_bits.h"
35 #include "h264.h"
36 #include "h2645_vui.h"
37 
38 #define MAX_SPS_COUNT 32
39 #define MAX_PPS_COUNT 256
40 #define MAX_LOG2_MAX_FRAME_NUM (12 + 4)
41 
42 /**
43  * Sequence parameter set
44  */
45 typedef struct SPS {
46  unsigned int sps_id;
48  int level_idc;
50  int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
51  int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
52  int poc_type; ///< pic_order_cnt_type
53  int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
57  int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
58  int ref_frame_count; ///< num_ref_frames
60  int mb_width; ///< pic_width_in_mbs_minus1 + 1
61  ///< (pic_height_in_map_units_minus1 + 1) * (2 - frame_mbs_only_flag)
62  int mb_height;
64  int mb_aff; ///< mb_adaptive_frame_field_flag
66  int crop; ///< frame_cropping_flag
67 
68  /* those 4 are already in luma samples */
69  unsigned int crop_left; ///< frame_cropping_rect_left_offset
70  unsigned int crop_right; ///< frame_cropping_rect_right_offset
71  unsigned int crop_top; ///< frame_cropping_rect_top_offset
72  unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset
75 
78  uint32_t time_scale;
84  uint8_t scaling_matrix4[6][16];
85  uint8_t scaling_matrix8[6][64];
90  int cpb_cnt; ///< See H.264 E.1.2
91  int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 + 1
92  int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1
93  int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1
94  int bit_depth_luma; ///< bit_depth_luma_minus8 + 8
95  int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
96  int residual_color_transform_flag; ///< residual_colour_transform_flag
97  int constraint_set_flags; ///< constraint_set[0-3]_flag
98  uint8_t data[4096];
99  size_t data_size;
100 } SPS;
101 
102 /**
103  * Picture parameter set
104  */
105 typedef struct PPS {
106  unsigned int sps_id;
107  int cabac; ///< entropy_coding_mode_flag
108  int pic_order_present; ///< pic_order_present_flag
109  int slice_group_count; ///< num_slice_groups_minus1 + 1
111  unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
112  int weighted_pred; ///< weighted_pred_flag
114  int init_qp; ///< pic_init_qp_minus26 + 26
115  int init_qs; ///< pic_init_qs_minus26 + 26
117  int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
118  int constrained_intra_pred; ///< constrained_intra_pred_flag
119  int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
120  int transform_8x8_mode; ///< transform_8x8_mode_flag
121  uint8_t scaling_matrix4[6][16];
122  uint8_t scaling_matrix8[6][64];
123  uint8_t chroma_qp_table[2][QP_MAX_NUM+1]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
125  uint8_t data[4096];
126  size_t data_size;
127 
128  uint32_t dequant4_buffer[6][QP_MAX_NUM + 1][16];
129  uint32_t dequant8_buffer[6][QP_MAX_NUM + 1][64];
130  uint32_t(*dequant4_coeff[6])[16];
131  uint32_t(*dequant8_coeff[6])[64];
132 
134  const SPS *sps;
135 } PPS;
136 
137 typedef struct H264ParamSets {
140 
142  /* currently active parameters sets */
143  const PPS *pps;
144  const SPS *sps;
145 
147 } H264ParamSets;
148 
149 /**
150  * compute profile from sps
151  */
152 int ff_h264_get_profile(const SPS *sps);
153 
154 /**
155  * Decode SPS
156  */
158  H264ParamSets *ps, int ignore_truncation);
159 
160 /**
161  * Decode PPS
162  */
164  H264ParamSets *ps, int bit_length);
165 
166 /**
167  * Uninit H264 param sets structure.
168  */
170 
171 #endif /* AVCODEC_H264_PS_H */
SPS::offset_for_ref_frame
int32_t offset_for_ref_frame[256]
Definition: h264_ps.h:80
SPS::cpb_removal_delay_length
int cpb_removal_delay_length
cpb_removal_delay_length_minus1 + 1
Definition: h264_ps.h:92
SPS::scaling_matrix_present
int scaling_matrix_present
Definition: h264_ps.h:83
SPS::crop_bottom
unsigned int crop_bottom
frame_cropping_rect_bottom_offset
Definition: h264_ps.h:72
H264ParamSets::sps
const SPS * sps
Definition: h264_ps.h:144
PPS::scaling_matrix4
uint8_t scaling_matrix4[6][16]
Definition: h264_ps.h:121
SPS::mb_width
int mb_width
pic_width_in_mbs_minus1 + 1
Definition: h264_ps.h:60
SPS::offset_for_non_ref_pic
int offset_for_non_ref_pic
Definition: h264_ps.h:55
rational.h
SPS::crop_right
unsigned int crop_right
frame_cropping_rect_right_offset
Definition: h264_ps.h:70
PPS::chroma_qp_index_offset
int chroma_qp_index_offset[2]
Definition: h264_ps.h:116
SPS::crop_top
unsigned int crop_top
frame_cropping_rect_top_offset
Definition: h264_ps.h:71
SPS::fixed_frame_rate_flag
int fixed_frame_rate_flag
Definition: h264_ps.h:79
SPS::frame_mbs_only_flag
int frame_mbs_only_flag
Definition: h264_ps.h:63
SPS::poc_type
int poc_type
pic_order_cnt_type
Definition: h264_ps.h:52
SPS::num_reorder_frames
int num_reorder_frames
Definition: h264_ps.h:82
PPS::constrained_intra_pred
int constrained_intra_pred
constrained_intra_pred_flag
Definition: h264_ps.h:118
PPS::redundant_pic_cnt_present
int redundant_pic_cnt_present
redundant_pic_cnt_present_flag
Definition: h264_ps.h:119
PPS::weighted_bipred_idc
int weighted_bipred_idc
Definition: h264_ps.h:113
GetBitContext
Definition: get_bits.h:61
ff_h264_decode_seq_parameter_set
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:280
SPS::residual_color_transform_flag
int residual_color_transform_flag
residual_colour_transform_flag
Definition: h264_ps.h:96
PPS::ref_count
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264_ps.h:111
PPS::scaling_matrix8
uint8_t scaling_matrix8[6][64]
Definition: h264_ps.h:122
SPS::num_units_in_tick
uint32_t num_units_in_tick
Definition: h264_ps.h:77
SPS::bit_depth_chroma
int bit_depth_chroma
bit_depth_chroma_minus8 + 8
Definition: h264_ps.h:95
SPS::profile_idc
int profile_idc
Definition: h264_ps.h:47
H264ParamSets::overread_warning_printed
int overread_warning_printed[2]
Definition: h264_ps.h:146
QP_MAX_NUM
#define QP_MAX_NUM
Definition: h264.h:27
SPS::transform_bypass
int transform_bypass
qpprime_y_zero_transform_bypass_flag
Definition: h264_ps.h:50
PPS::deblocking_filter_parameters_present
int deblocking_filter_parameters_present
deblocking_filter_parameters_present_flag
Definition: h264_ps.h:117
get_bits.h
H264ParamSets::sps_list
AVBufferRef * sps_list[MAX_SPS_COUNT]
Definition: h264_ps.h:138
SPS::direct_8x8_inference_flag
int direct_8x8_inference_flag
Definition: h264_ps.h:65
SPS::crop_left
unsigned int crop_left
frame_cropping_rect_left_offset
Definition: h264_ps.h:69
SPS::gaps_in_frame_num_allowed_flag
int gaps_in_frame_num_allowed_flag
Definition: h264_ps.h:59
SPS::scaling_matrix8
uint8_t scaling_matrix8[6][64]
Definition: h264_ps.h:85
SPS::ref_frame_count
int ref_frame_count
num_ref_frames
Definition: h264_ps.h:58
SPS::sps_id
unsigned int sps_id
Definition: h264_ps.h:46
ff_h264_decode_picture_parameter_set
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:695
SPS::mb_aff
int mb_aff
mb_adaptive_frame_field_flag
Definition: h264_ps.h:64
PPS::cabac
int cabac
entropy_coding_mode_flag
Definition: h264_ps.h:107
PPS::pic_order_present
int pic_order_present
pic_order_present_flag
Definition: h264_ps.h:108
PPS::dequant4_coeff
uint32_t(*[6] dequant4_coeff)[16]
Definition: h264_ps.h:130
PPS::dequant8_coeff
uint32_t(*[6] dequant8_coeff)[64]
Definition: h264_ps.h:131
ff_h264_ps_uninit
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:264
SPS::time_offset_length
int time_offset_length
Definition: h264_ps.h:89
SPS
Sequence parameter set.
Definition: h264_ps.h:45
PPS
Picture parameter set.
Definition: h264_ps.h:105
PPS::init_qp
int init_qp
pic_init_qp_minus26 + 26
Definition: h264_ps.h:114
H2645VUI
Definition: h2645_vui.h:27
MAX_PPS_COUNT
#define MAX_PPS_COUNT
Definition: h264_ps.h:39
SPS::vcl_hrd_parameters_present_flag
int vcl_hrd_parameters_present_flag
Definition: h264_ps.h:87
SPS::timing_info_present_flag
int timing_info_present_flag
Definition: h264_ps.h:76
SPS::poc_cycle_length
int poc_cycle_length
num_ref_frames_in_pic_order_cnt_cycle
Definition: h264_ps.h:57
PPS::weighted_pred
int weighted_pred
weighted_pred_flag
Definition: h264_ps.h:112
SPS::vui
H2645VUI vui
Definition: h264_ps.h:74
SPS::delta_pic_order_always_zero_flag
int delta_pic_order_always_zero_flag
Definition: h264_ps.h:54
buffer.h
SPS::offset_for_top_to_bottom_field
int offset_for_top_to_bottom_field
Definition: h264_ps.h:56
SPS::crop
int crop
frame_cropping_flag
Definition: h264_ps.h:66
SPS::data_size
size_t data_size
Definition: h264_ps.h:99
PPS::data_size
size_t data_size
Definition: h264_ps.h:126
PPS::init_qs
int init_qs
pic_init_qs_minus26 + 26
Definition: h264_ps.h:115
SPS::initial_cpb_removal_delay_length
int initial_cpb_removal_delay_length
initial_cpb_removal_delay_length_minus1 + 1
Definition: h264_ps.h:91
SPS::data
uint8_t data[4096]
Definition: h264_ps.h:98
PPS::data
uint8_t data[4096]
Definition: h264_ps.h:125
SPS::log2_max_poc_lsb
int log2_max_poc_lsb
log2_max_pic_order_cnt_lsb_minus4
Definition: h264_ps.h:53
PPS::transform_8x8_mode
int transform_8x8_mode
transform_8x8_mode_flag
Definition: h264_ps.h:120
PPS::chroma_qp_table
uint8_t chroma_qp_table[2][QP_MAX_NUM+1]
pre-scaled (with chroma_qp_index_offset) version of qp_table
Definition: h264_ps.h:123
SPS::dpb_output_delay_length
int dpb_output_delay_length
dpb_output_delay_length_minus1 + 1
Definition: h264_ps.h:93
PPS::slice_group_count
int slice_group_count
num_slice_groups_minus1 + 1
Definition: h264_ps.h:109
avcodec.h
SPS::constraint_set_flags
int constraint_set_flags
constraint_set[0-3]_flag
Definition: h264_ps.h:97
SPS::nal_hrd_parameters_present_flag
int nal_hrd_parameters_present_flag
Definition: h264_ps.h:86
PPS::sps
const SPS * sps
Definition: h264_ps.h:134
pixfmt.h
h2645_vui.h
sps
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
Definition: cbs_h264_syntax_template.c:260
PPS::sps_id
unsigned int sps_id
Definition: h264_ps.h:106
AVCodecContext
main external API structure.
Definition: avcodec.h:398
H264ParamSets::pps_list
AVBufferRef * pps_list[MAX_PPS_COUNT]
Definition: h264_ps.h:139
SPS::vui_parameters_present_flag
int vui_parameters_present_flag
Definition: h264_ps.h:73
H264ParamSets
Definition: h264_ps.h:137
SPS::chroma_format_idc
int chroma_format_idc
Definition: h264_ps.h:49
MAX_SPS_COUNT
#define MAX_SPS_COUNT
Definition: h264_ps.h:38
ff_h264_get_profile
int ff_h264_get_profile(const SPS *sps)
compute profile from sps
Definition: h264_parse.c:531
SPS::mb_height
int mb_height
Definition: h264_ps.h:62
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:82
PPS::dequant8_buffer
uint32_t dequant8_buffer[6][QP_MAX_NUM+1][64]
Definition: h264_ps.h:129
SPS::level_idc
int level_idc
Definition: h264_ps.h:48
SPS::bit_depth_luma
int bit_depth_luma
bit_depth_luma_minus8 + 8
Definition: h264_ps.h:94
SPS::time_scale
uint32_t time_scale
Definition: h264_ps.h:78
int32_t
int32_t
Definition: audioconvert.c:56
h264.h
PPS::mb_slice_group_map_type
int mb_slice_group_map_type
Definition: h264_ps.h:110
SPS::pic_struct_present_flag
int pic_struct_present_flag
Definition: h264_ps.h:88
H264ParamSets::pps
const PPS * pps
Definition: h264_ps.h:143
SPS::bitstream_restriction_flag
int bitstream_restriction_flag
Definition: h264_ps.h:81
SPS::scaling_matrix4
uint8_t scaling_matrix4[6][16]
Definition: h264_ps.h:84
SPS::cpb_cnt
int cpb_cnt
See H.264 E.1.2.
Definition: h264_ps.h:90
SPS::log2_max_frame_num
int log2_max_frame_num
log2_max_frame_num_minus4 + 4
Definition: h264_ps.h:51
PPS::chroma_qp_diff
int chroma_qp_diff
Definition: h264_ps.h:124
PPS::dequant4_buffer
uint32_t dequant4_buffer[6][QP_MAX_NUM+1][16]
Definition: h264_ps.h:128
H264ParamSets::pps_ref
AVBufferRef * pps_ref
Definition: h264_ps.h:141
PPS::sps_ref
AVBufferRef * sps_ref
Definition: h264_ps.h:133