2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #ifndef AVCODEC_CBS_MPEG2_H
20 #define AVCODEC_CBS_MPEG2_H
25 #include "libavutil/buffer.h"
29 MPEG2_START_PICTURE = 0x00,
30 MPEG2_START_SLICE_MIN = 0x01,
31 MPEG2_START_SLICE_MAX = 0xaf,
32 MPEG2_START_USER_DATA = 0xb2,
33 MPEG2_START_SEQUENCE_HEADER = 0xb3,
34 MPEG2_START_SEQUENCE_ERROR = 0xb4,
35 MPEG2_START_EXTENSION = 0xb5,
36 MPEG2_START_SEQUENCE_END = 0xb7,
37 MPEG2_START_GROUP = 0xb8,
40 #define MPEG2_START_IS_SLICE(type) \
41 ((type) >= MPEG2_START_SLICE_MIN && \
42 (type) <= MPEG2_START_SLICE_MAX)
45 MPEG2_EXTENSION_SEQUENCE = 0x1,
46 MPEG2_EXTENSION_SEQUENCE_DISPLAY = 0x2,
47 MPEG2_EXTENSION_QUANT_MATRIX = 0x3,
48 MPEG2_EXTENSION_COPYRIGHT = 0x4,
49 MPEG2_EXTENSION_SEQUENCE_SCALABLE = 0x5,
50 MPEG2_EXTENSION_PICTURE_DISPLAY = 0x7,
51 MPEG2_EXTENSION_PICTURE_CODING = 0x8,
52 MPEG2_EXTENSION_PICTURE_SPATIAL_SCALABLE = 0x9,
53 MPEG2_EXTENSION_PICTURE_TEMPORAL_SCALABLE = 0xa,
54 MPEG2_EXTENSION_CAMERA_PARAMETERS = 0xb,
55 MPEG2_EXTENSION_ITU_T = 0xc,
59 typedef struct MPEG2RawSequenceHeader {
60 uint8_t sequence_header_code;
62 uint16_t horizontal_size_value;
63 uint16_t vertical_size_value;
64 uint8_t aspect_ratio_information;
65 uint8_t frame_rate_code;
66 uint32_t bit_rate_value;
67 uint16_t vbv_buffer_size_value;
68 uint8_t constrained_parameters_flag;
70 uint8_t load_intra_quantiser_matrix;
71 uint8_t intra_quantiser_matrix[64];
72 uint8_t load_non_intra_quantiser_matrix;
73 uint8_t non_intra_quantiser_matrix[64];
74 } MPEG2RawSequenceHeader;
76 typedef struct MPEG2RawUserData {
77 uint8_t user_data_start_code;
80 AVBufferRef *user_data_ref;
81 size_t user_data_length;
84 typedef struct MPEG2RawSequenceExtension {
85 uint8_t profile_and_level_indication;
86 uint8_t progressive_sequence;
87 uint8_t chroma_format;
88 uint8_t horizontal_size_extension;
89 uint8_t vertical_size_extension;
90 uint16_t bit_rate_extension;
91 uint8_t vbv_buffer_size_extension;
93 uint8_t frame_rate_extension_n;
94 uint8_t frame_rate_extension_d;
95 } MPEG2RawSequenceExtension;
97 typedef struct MPEG2RawSequenceDisplayExtension {
100 uint8_t colour_description;
101 uint8_t colour_primaries;
102 uint8_t transfer_characteristics;
103 uint8_t matrix_coefficients;
105 uint16_t display_horizontal_size;
106 uint16_t display_vertical_size;
107 } MPEG2RawSequenceDisplayExtension;
109 typedef struct MPEG2RawGroupOfPicturesHeader {
110 uint8_t group_start_code;
115 } MPEG2RawGroupOfPicturesHeader;
117 typedef struct MPEG2RawExtraInformation {
118 uint8_t *extra_information;
119 AVBufferRef *extra_information_ref;
120 size_t extra_information_length;
121 } MPEG2RawExtraInformation;
123 typedef struct MPEG2RawPictureHeader {
124 uint8_t picture_start_code;
126 uint16_t temporal_reference;
127 uint8_t picture_coding_type;
130 uint8_t full_pel_forward_vector;
131 uint8_t forward_f_code;
132 uint8_t full_pel_backward_vector;
133 uint8_t backward_f_code;
135 MPEG2RawExtraInformation extra_information_picture;
136 } MPEG2RawPictureHeader;
138 typedef struct MPEG2RawPictureCodingExtension {
139 uint8_t f_code[2][2];
141 uint8_t intra_dc_precision;
142 uint8_t picture_structure;
143 uint8_t top_field_first;
144 uint8_t frame_pred_frame_dct;
145 uint8_t concealment_motion_vectors;
146 uint8_t q_scale_type;
147 uint8_t intra_vlc_format;
148 uint8_t alternate_scan;
149 uint8_t repeat_first_field;
150 uint8_t chroma_420_type;
151 uint8_t progressive_frame;
153 uint8_t composite_display_flag;
155 uint8_t field_sequence;
157 uint8_t burst_amplitude;
158 uint8_t sub_carrier_phase;
159 } MPEG2RawPictureCodingExtension;
161 typedef struct MPEG2RawQuantMatrixExtension {
162 uint8_t load_intra_quantiser_matrix;
163 uint8_t intra_quantiser_matrix[64];
164 uint8_t load_non_intra_quantiser_matrix;
165 uint8_t non_intra_quantiser_matrix[64];
166 uint8_t load_chroma_intra_quantiser_matrix;
167 uint8_t chroma_intra_quantiser_matrix[64];
168 uint8_t load_chroma_non_intra_quantiser_matrix;
169 uint8_t chroma_non_intra_quantiser_matrix[64];
170 } MPEG2RawQuantMatrixExtension;
172 typedef struct MPEG2RawPictureDisplayExtension {
173 int16_t frame_centre_horizontal_offset[3];
174 int16_t frame_centre_vertical_offset[3];
175 } MPEG2RawPictureDisplayExtension;
177 typedef struct MPEG2RawExtensionData {
178 uint8_t extension_start_code;
179 uint8_t extension_start_code_identifier;
182 MPEG2RawSequenceExtension sequence;
183 MPEG2RawSequenceDisplayExtension sequence_display;
184 MPEG2RawQuantMatrixExtension quant_matrix;
185 MPEG2RawPictureCodingExtension picture_coding;
186 MPEG2RawPictureDisplayExtension picture_display;
188 } MPEG2RawExtensionData;
190 typedef struct MPEG2RawSliceHeader {
191 uint8_t slice_vertical_position;
193 uint8_t slice_vertical_position_extension;
194 uint8_t priority_breakpoint;
196 uint8_t quantiser_scale_code;
198 uint8_t slice_extension_flag;
200 uint8_t slice_picture_id_enable;
201 uint8_t slice_picture_id;
203 MPEG2RawExtraInformation extra_information_slice;
204 } MPEG2RawSliceHeader;
206 typedef struct MPEG2RawSlice {
207 MPEG2RawSliceHeader header;
210 AVBufferRef *data_ref;
215 typedef struct MPEG2RawSequenceEnd {
216 uint8_t sequence_end_code;
217 } MPEG2RawSequenceEnd;
220 typedef struct CodedBitstreamMPEG2Context {
221 // Elements stored in headers which are required for other decoding.
222 uint16_t horizontal_size;
223 uint16_t vertical_size;
225 uint8_t scalable_mode;
226 uint8_t progressive_sequence;
227 uint8_t number_of_frame_centre_offsets;
228 } CodedBitstreamMPEG2Context;
231 #endif /* AVCODEC_CBS_MPEG2_H */