mirror of https://github.com/FFmpeg/FFmpeg.git
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/*
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* RAW HEVC video demuxer |
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* Copyright (c) 2013 Dirk Farin <dirk.farin@gmail.com> |
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* |
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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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#include "libavcodec/hevc.h" |
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#include "avformat.h" |
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#include "rawdec.h" |
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static int hevc_probe(AVProbeData *p) |
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{ |
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uint32_t code = -1; |
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int vps = 0, 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 = (code & 0x7E) >> 1; |
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if (code & 0x81) // forbidden and reserved zero bits
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return 0; |
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if (nal2 & 0xf8) // reserved zero
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return 0; |
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switch (type) { |
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case NAL_VPS: vps++; break; |
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case NAL_SPS: sps++; break; |
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case NAL_PPS: pps++; break; |
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case NAL_BLA_N_LP: |
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case NAL_BLA_W_LP: |
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case NAL_BLA_W_RADL: |
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case NAL_CRA_NUT: |
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case NAL_IDR_N_LP: |
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case NAL_IDR_W_RADL: irap++; break; |
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} |
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} |
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} |
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if (vps && 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(hevc, "raw HEVC video", hevc_probe, "hevc,h265,265", AV_CODEC_ID_HEVC) |
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