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