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77 lines
2.3 KiB
77 lines
2.3 KiB
/* |
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* RAW H.266 / VVC video demuxer |
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* Copyright (c) 2020 Nuo Mi <nuomi2021@gmail.com> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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#include "libavcodec/vvc.h" |
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#include "avformat.h" |
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#include "rawdec.h" |
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static int check_temporal_id(uint8_t nuh_temporal_id_plus1, int type) |
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{ |
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if (nuh_temporal_id_plus1 == 0) |
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return 0; |
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if (nuh_temporal_id_plus1 != 1) { |
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if (type >= VVC_IDR_W_RADL && type <= VVC_RSV_IRAP_11 |
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|| type == VVC_DCI_NUT || type == VVC_OPI_NUT |
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|| type == VVC_VPS_NUT || type == VVC_SPS_NUT |
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|| type == VVC_EOS_NUT || type == VVC_EOB_NUT) |
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return 0; |
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} |
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return 1; |
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} |
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static int vvc_probe(const AVProbeData *p) |
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{ |
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uint32_t code = -1; |
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int sps = 0, pps = 0, irap = 0; |
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int i; |
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for (i = 0; i < p->buf_size - 1; i++) { |
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code = (code << 8) + p->buf[i]; |
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if ((code & 0xffffff00) == 0x100) { |
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uint8_t nal2 = p->buf[i + 1]; |
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int type = (nal2 & 0xF8) >> 3; |
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if (code & 0x80) // forbidden_zero_bit |
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return 0; |
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if (!check_temporal_id(nal2 & 0x7, type)) |
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return 0; |
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switch (type) { |
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case VVC_SPS_NUT: sps++; break; |
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case VVC_PPS_NUT: pps++; break; |
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case VVC_IDR_N_LP: |
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case VVC_IDR_W_RADL: |
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case VVC_CRA_NUT: |
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case VVC_GDR_NUT: irap++; break; |
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} |
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} |
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} |
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if (sps && pps && irap) |
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return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg |
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return 0; |
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} |
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FF_DEF_RAWVIDEO_DEMUXER(vvc, "raw H.266/VVC video", vvc_probe, "h266,266,vvc", AV_CODEC_ID_VVC)
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