| /* | |
| * RAW AVS3-P2/IEEE1857.10 video demuxer | |
| * Copyright (c) 2020 Zhenyu Wang <wangzhenyu@pkusz.edu.cn> | |
| * Bingjie Han <hanbj@pkusz.edu.cn> | |
| * Huiwen Ren <hwrenx@gmail.com> | |
| * | |
| * 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 | |
| */ | |
| #include "libavcodec/avs3.h" | |
| #include "libavcodec/startcode.h" | |
| #include "avformat.h" | |
| #include "rawdec.h" | |
| static int avs3video_probe(const AVProbeData *p) | |
| { | |
| const uint8_t *ptr = p->buf, *end = p->buf + p->buf_size; | |
| uint32_t code = -1; | |
| uint8_t state = 0; | |
| int pic = 0, seq = 0, slice_pos = 0; | |
| int ret = 0; | |
| while (ptr < end) { | |
| ptr = avpriv_find_start_code(ptr, end, &code); | |
| state = code & 0xFF; | |
| if ((code & 0xFFFFFF00) == 0x100) { | |
| if (state < AVS3_SEQ_START_CODE) { | |
| if (code < slice_pos) | |
| return 0; | |
| slice_pos = code; | |
| } else { | |
| slice_pos = 0; | |
| } | |
| if (state == AVS3_SEQ_START_CODE) { | |
| seq++; | |
| if (*ptr != AVS3_PROFILE_BASELINE_MAIN && *ptr != AVS3_PROFILE_BASELINE_MAIN10) | |
| return 0; | |
| } else if (AVS3_ISPIC(state)) { | |
| pic++; | |
| } else if ((state == AVS3_UNDEF_START_CODE) || | |
| (state > AVS3_VIDEO_EDIT_CODE)) { | |
| return 0; | |
| } | |
| } | |
| } | |
| if (seq && pic && av_match_ext(p->filename, "avs3")) { | |
| ret = AVPROBE_SCORE_MAX; | |
| } | |
| return ret; | |
| } | |
| FF_DEF_RAWVIDEO_DEMUXER(avs3, "raw AVS3-P2/IEEE1857.10", avs3video_probe, "avs3", AV_CODEC_ID_AVS3) |