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_H264_SEI_H
20 #define AVCODEC_H264_SEI_H
29 H264_SEI_TYPE_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
30 H264_SEI_TYPE_PIC_TIMING = 1, ///< picture timing
31 H264_SEI_TYPE_PAN_SCAN_RECT = 2, ///< pan-scan rectangle
32 H264_SEI_TYPE_FILLER_PAYLOAD = 3, ///< filler data
33 H264_SEI_TYPE_USER_DATA_REGISTERED = 4, ///< registered user data as specified by Rec. ITU-T T.35
34 H264_SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
35 H264_SEI_TYPE_RECOVERY_POINT = 6, ///< recovery point (frame # to decoder sync)
36 H264_SEI_TYPE_FRAME_PACKING = 45, ///< frame packing arrangement
37 H264_SEI_TYPE_DISPLAY_ORIENTATION = 47, ///< display orientation
38 H264_SEI_TYPE_GREEN_METADATA = 56, ///< GreenMPEG information
39 H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME = 137, ///< mastering display properties
40 H264_SEI_TYPE_ALTERNATIVE_TRANSFER = 147, ///< alternative transfer
44 * pic_struct in picture timing SEI message
47 H264_SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
48 H264_SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
49 H264_SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
50 H264_SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
51 H264_SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
52 H264_SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
53 H264_SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
54 H264_SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
55 H264_SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
56 } H264_SEI_PicStructType;
59 * frame_packing_arrangement types
62 H264_SEI_FPA_TYPE_CHECKERBOARD = 0,
63 H264_SEI_FPA_TYPE_INTERLEAVE_COLUMN = 1,
64 H264_SEI_FPA_TYPE_INTERLEAVE_ROW = 2,
65 H264_SEI_FPA_TYPE_SIDE_BY_SIDE = 3,
66 H264_SEI_FPA_TYPE_TOP_BOTTOM = 4,
67 H264_SEI_FPA_TYPE_INTERLEAVE_TEMPORAL = 5,
68 H264_SEI_FPA_TYPE_2D = 6,
71 typedef struct H264SEITimeCode {
72 /* When not continuously receiving full timecodes, we have to reference
73 the previous timecode received */
82 typedef struct H264SEIPictureTiming {
83 // maximum size of pic_timing according to the spec should be 274 bits
85 int payload_size_bits;
88 H264_SEI_PicStructType pic_struct;
91 * Bit set of clock types for fields/frames in picture timing SEI message.
92 * For each found ct_type, appropriate bit is set (e.g., bit 1 for
98 * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
100 int dpb_output_delay;
103 * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
105 int cpb_removal_delay;
108 * Maximum three timecodes in a pic_timing SEI.
110 H264SEITimeCode timecode[3];
113 * Number of timecode in use
116 } H264SEIPictureTiming;
118 typedef struct H264SEIAFD {
120 uint8_t active_format_description;
123 typedef struct H264SEIA53Caption {
124 AVBufferRef *buf_ref;
127 typedef struct H264SEIUnregistered {
129 } H264SEIUnregistered;
131 typedef struct H264SEIRecoveryPoint {
135 * Set to -1 if no recovery point SEI message found or to number of frames
136 * before playback synchronizes. Frames having recovery point are key
139 int recovery_frame_cnt;
140 } H264SEIRecoveryPoint;
142 typedef struct H264SEIBufferingPeriod {
143 int present; ///< Buffering period SEI flag
144 int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
145 } H264SEIBufferingPeriod;
147 typedef struct H264SEIFramePacking {
150 int arrangement_cancel_flag; ///< is previous arrangement canceled, -1 if never received
151 H264_SEI_FpaType arrangement_type;
152 int arrangement_repetition_period;
153 int content_interpretation_type;
154 int quincunx_sampling_flag;
155 int current_frame_is_frame0_flag;
156 } H264SEIFramePacking;
158 typedef struct H264SEIDisplayOrientation {
160 int anticlockwise_rotation;
162 } H264SEIDisplayOrientation;
164 typedef struct H264SEIGreenMetaData {
165 uint8_t green_metadata_type;
167 uint16_t num_seconds;
168 uint16_t num_pictures;
169 uint8_t percent_non_zero_macroblocks;
170 uint8_t percent_intra_coded_macroblocks;
171 uint8_t percent_six_tap_filtering;
172 uint8_t percent_alpha_point_deblocking_instance;
173 uint8_t xsd_metric_type;
174 uint16_t xsd_metric_value;
175 } H264SEIGreenMetaData;
177 typedef struct H264SEIAlternativeTransfer {
179 int preferred_transfer_characteristics;
180 } H264SEIAlternativeTransfer;
182 typedef struct H264SEIContext {
183 H264SEIPictureTiming picture_timing;
185 H264SEIA53Caption a53_caption;
186 H264SEIUnregistered unregistered;
187 H264SEIRecoveryPoint recovery_point;
188 H264SEIBufferingPeriod buffering_period;
189 H264SEIFramePacking frame_packing;
190 H264SEIDisplayOrientation display_orientation;
191 H264SEIGreenMetaData green_metadata;
192 H264SEIAlternativeTransfer alternative_transfer;
195 struct H264ParamSets;
197 int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb,
198 const struct H264ParamSets *ps, void *logctx);
201 * Reset SEI values at the beginning of the frame.
203 void ff_h264_sei_uninit(H264SEIContext *h);
206 * Get stereo_mode string from the h264 frame_packing_arrangement
208 const char *ff_h264_sei_stereo_mode(const H264SEIFramePacking *h);
211 * Parse the contents of a picture timing message given an active SPS.
213 int ff_h264_sei_process_picture_timing(H264SEIPictureTiming *h, const SPS *sps,
216 #endif /* AVCODEC_H264_SEI_H */