/* | |
* RAW HEVC video demuxer | |
* Copyright (c) 2013 Dirk Farin <[email protected]> | |
* | |
* 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 | |
*/ | |
static int hevc_probe(const 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) | |