mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
2.0 KiB
64 lines
2.0 KiB
/* |
|
* 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 NAL_VPS: vps++; break; |
|
case NAL_SPS: sps++; break; |
|
case NAL_PPS: pps++; break; |
|
case NAL_BLA_N_LP: |
|
case NAL_BLA_W_LP: |
|
case NAL_BLA_W_RADL: |
|
case NAL_CRA_NUT: |
|
case NAL_IDR_N_LP: |
|
case 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)
|
|
|