[FFmpeg-devel] [PATCH 1/6] avcodec/h266: add shared header for h266
Nuo Mi
nuomi2021 at gmail.com
Mon Dec 21 08:10:14 EET 2020
This patch set need work with https://github.com/fraunhoferhhi/vvdec/pull/18
On Mon, Dec 21, 2020 at 2:08 PM Nuo Mi <nuomi2021 at gmail.com> wrote:
> ---
> libavcodec/h266.h | 121 ++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 121 insertions(+)
> create mode 100644 libavcodec/h266.h
>
> diff --git a/libavcodec/h266.h b/libavcodec/h266.h
> new file mode 100644
> index 0000000000..d5793b76fc
> --- /dev/null
> +++ b/libavcodec/h266.h
> @@ -0,0 +1,121 @@
> +/*
> + * H.266 shared code
> + *
> + * This file is part of FFmpeg.
> + *
> + * FFmpeg is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2.1 of the License, or (at your option) any later version.
> + *
> + * FFmpeg is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with FFmpeg; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> 02110-1301 USA
> + */
> +
> +#ifndef AVCODEC_H266_H
> +#define AVCODEC_H266_H
> +
> +/**
> + * Table 5 – NAL unit type codes and NAL unit type classes in
> + * T-REC-H.266-202008
> + */
> +enum H266NALUnitType {
> + H266_NAL_TRAIL = 0,
> + H266_NAL_STSA = 1,
> + H266_NAL_RADL = 2,
> + H266_NAL_RASL = 3,
> + H266_NAL_RSV_VCL_4 = 4,
> + H266_NAL_RSV_VCL_5 = 5,
> + H266_NAL_RSV_VCL_6 = 6,
> + H266_NAL_IDR_W_RADL = 7,
> + H266_NAL_IDR_N_LP = 8,
> + H266_NAL_CRA_NUT = 9,
> + H266_NAL_GDR_NUT = 10,
> + H266_NAL_RSV_IRAP_11 = 11,
> + H266_NAL_OPI = 12,
> + H266_NAL_DCI = 13,
> + H266_NAL_VPS = 14,
> + H266_NAL_SPS = 15,
> + H266_NAL_PPS = 16,
> + H266_NAL_PREFIX_APS = 17,
> + H266_NAL_SUFFIX_APS = 18,
> + H266_NAL_PH = 19,
> + H266_NAL_AUD = 20,
> + H266_NAL_EOS_NUT = 21,
> + H266_NAL_EOB_NUT = 22,
> + H266_NAL_PREFIX_SEI = 23,
> + H266_NAL_SUFFIX_SEI = 24,
> + H266_NAL_FD_NUT = 25,
> + H266_NAL_RSV_NVCL_26 = 26,
> + H266_NAL_RSV_NVCL_27 = 27,
> + H266_NAL_UNSPEC_28 = 28,
> + H266_NAL_UNSPEC_29 = 29,
> + H266_NAL_UNSPEC_30 = 30,
> + H266_NAL_UNSPEC_31 = 31,
> +};
> +
> +enum H266SliceType {
> + H266_SLICE_B = 0,
> + H266_SLICE_P = 1,
> + H266_SLICE_I = 2,
> +};
> +
> +enum {
> + H266_MAX_PLANES = 3,
> + //7.4.3.3 The value of vps_max_sublayers_minus1 shall be in the
> range of 0 to 6, inclusive
> + H266_MAX_SUB_LAYERS = 7,
> +
> + // 7.3.2.3: vps_video_parameter_set_id is u(4).
> + H266_MAX_VPS_COUNT = 16,
> + // 7.3.2.4: sps_seq_parameter_set_id is in [0, 15].
> + H266_MAX_SPS_COUNT = 16,
> + // 7.3.2.5: pps_pic_parameter_set_id is in [0, 63].
> + H266_MAX_PPS_COUNT = 64,
> +
> + // A.4.2: MaxDpbSize is bounded above by 16.
> + H266_MAX_DPB_SIZE = 16,
> +
> + //7.4.3.4 sps_num_ref_pic_lists in range [0, 64]
> + H266_MAX_REF_PIC_LISTS = 64,
> +
> + //7.4.3.3 sps_num_points_in_qp_table_minus1[i] in range [0, 36 −
> sps_qp_table_start_minus26[i]],
> + //sps_qp_table_start_minus26[i] in range
> [sps_qp_table_start_minus26[i] −26 − QpBdOffset, 36]
> + //for 10 bitsQpBdOffset is 12, so
> sps_num_points_in_qp_table_minus1[i] in range [0, 74]
> + H266_MAX_POINTS_IN_QP_TABLE = 75,
> +
> + // 7.4.6.1: hrd_cpb_cnt_minus1 is in [0, 31].
> + H266_MAX_CPB_CNT = 32,
> +
> + // A.4.1: in table A.6 the highest level allows a MaxLumaPs of 35 651
> 584.
> + H266_MAX_LUMA_PS = 35651584,
> + // A.4.1: pic_width_in_luma_samples and pic_height_in_luma_samples are
> + // constrained to be not greater than sqrt(MaxLumaPs * 8). Hence
> height/
> + // width are bounded above by sqrt(8 * 35651584) = 16888.2 samples.
> + H266_MAX_WIDTH = 16888,
> + H266_MAX_HEIGHT = 16888,
> +
> + // A.4.1: table A.1 allows at most 20 tile rows for any level.
> + H266_MAX_TILE_ROWS = 20,
> + // A.4.1: table A.1 allows at most 20 tile columns for any level.
> + H266_MAX_TILE_COLUMNS = 20,
> +
> + // A.4.1 table A.1 allows at most 600 slice for any level.
> + H266_MAX_SLICES = 600,
> +
> + // 7.4.8: in the worst case (tiles_enabled_flag and
> + // entropy_coding_sync_enabled_flag are both set), entry points can be
> + // placed at the beginning of every Ctb row in every tile, giving an
> + // upper bound of (num_tile_columns_minus1 + 1) * PicHeightInCtbsY -
> 1.
> + // Only a stream with very high resolution and perverse parameters
> could
> + // get near that, though, so set a lower limit here with the maximum
> + // possible value for 8K video (at most 135 32x32 Ctb rows).
> + H266_MAX_ENTRY_POINT_OFFSETS = H266_MAX_TILE_COLUMNS * 135,
> +};
> +
> +#endif /* AVCODEC_H266_H */
> --
> 2.25.1
>
>
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