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92 lines
3.2 KiB
92 lines
3.2 KiB
/* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* H.264 common definitions |
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*/ |
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#ifndef AVCODEC_H264_H |
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#define AVCODEC_H264_H |
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#define QP_MAX_NUM (51 + 2 * 6) // The maximum supported qp |
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/* NAL unit types */ |
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enum { |
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H264_NAL_SLICE = 1, |
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H264_NAL_DPA = 2, |
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H264_NAL_DPB = 3, |
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H264_NAL_DPC = 4, |
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H264_NAL_IDR_SLICE = 5, |
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H264_NAL_SEI = 6, |
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H264_NAL_SPS = 7, |
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H264_NAL_PPS = 8, |
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H264_NAL_AUD = 9, |
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H264_NAL_END_SEQUENCE = 10, |
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H264_NAL_END_STREAM = 11, |
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H264_NAL_FILLER_DATA = 12, |
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H264_NAL_SPS_EXT = 13, |
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H264_NAL_AUXILIARY_SLICE = 19, |
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}; |
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enum { |
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// 7.4.2.1.1: seq_parameter_set_id is in [0, 31]. |
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H264_MAX_SPS_COUNT = 32, |
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// 7.4.2.2: pic_parameter_set_id is in [0, 255]. |
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H264_MAX_PPS_COUNT = 256, |
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// A.3: MaxDpbFrames is bounded above by 16. |
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H264_MAX_DPB_FRAMES = 16, |
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// 7.4.2.1.1: max_num_ref_frames is in [0, MaxDpbFrames], and |
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// each reference frame can have two fields. |
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H264_MAX_REFS = 2 * H264_MAX_DPB_FRAMES, |
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// 7.4.3.1: modification_of_pic_nums_idc is not equal to 3 at most |
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// num_ref_idx_lN_active_minus1 + 1 times (that is, once for each |
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// possible reference), then equal to 3 once. |
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H264_MAX_RPLM_COUNT = H264_MAX_REFS + 1, |
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// 7.4.3.3: in the worst case, we begin with a full short-term |
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// reference picture list. Each picture in turn is moved to the |
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// long-term list (type 3) and then discarded from there (type 2). |
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// Then, we set the length of the long-term list (type 4), mark |
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// the current picture as long-term (type 6) and terminate the |
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// process (type 0). |
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H264_MAX_MMCO_COUNT = H264_MAX_REFS * 2 + 3, |
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// A.2.1, A.2.3: profiles supporting FMO constrain |
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// num_slice_groups_minus1 to be in [0, 7]. |
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H264_MAX_SLICE_GROUPS = 8, |
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// E.2.2: cpb_cnt_minus1 is in [0, 31]. |
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H264_MAX_CPB_CNT = 32, |
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// A.3: in table A-1 the highest level allows a MaxFS of 139264. |
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H264_MAX_MB_PIC_SIZE = 139264, |
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// A.3.1, A.3.2: PicWidthInMbs and PicHeightInMbs are constrained |
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// to be not greater than sqrt(MaxFS * 8). Hence height/width are |
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// bounded above by sqrt(139264 * 8) = 1055.5 macroblocks. |
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H264_MAX_MB_WIDTH = 1055, |
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H264_MAX_MB_HEIGHT = 1055, |
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H264_MAX_WIDTH = H264_MAX_MB_WIDTH * 16, |
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H264_MAX_HEIGHT = H264_MAX_MB_HEIGHT * 16, |
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}; |
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#endif /* AVCODEC_H264_H */
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