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- /*
- * RAW HEVC video demuxer
- * Copyright (c) 2013 Dirk Farin <dirk.farin@gmail.com>
- *
- * This file is part of Libav.
- *
- * Libav 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.
- *
- * Libav 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 Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
- #include "libavcodec/hevc.h"
-
- #include "avformat.h"
- #include "rawdec.h"
-
- static int hevc_probe(AVProbeData *p)
- {
- uint32_t code = -1;
- int vps = 0, sps = 0, pps = 0, irap = 0;
- int i;
-
- for (i = 0; i < p->buf_size - 1; i++) {
- code = (code << 8) + p->buf[i];
- if ((code & 0xffffff00) == 0x100) {
- uint8_t nal2 = p->buf[i + 1];
- int type = (code & 0x7E) >> 1;
-
- if (code & 0x81) // forbidden and reserved zero bits
- return 0;
-
- if (nal2 & 0xf8) // reserved zero
- return 0;
-
- switch (type) {
- case HEVC_NAL_VPS: vps++; break;
- case HEVC_NAL_SPS: sps++; break;
- case HEVC_NAL_PPS: pps++; break;
- case HEVC_NAL_BLA_N_LP:
- case HEVC_NAL_BLA_W_LP:
- case HEVC_NAL_BLA_W_RADL:
- case HEVC_NAL_CRA_NUT:
- case HEVC_NAL_IDR_N_LP:
- case HEVC_NAL_IDR_W_RADL: irap++; break;
- }
- }
- }
-
- if (vps && sps && pps && irap)
- return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg
- return 0;
- }
-
- FF_DEF_RAWVIDEO_DEMUXER(hevc, "raw HEVC video", hevc_probe, "hevc,h265,265", AV_CODEC_ID_HEVC)
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