| hwren | ff74ad2 | 2020-10-05 12:10:45 | [diff] [blame] | 1 | /* |
| 2 | * RAW AVS3-P2/IEEE1857.10 video demuxer |
| 3 | * Copyright (c) 2020 Zhenyu Wang <[email protected]> |
| 4 | * Bingjie Han <[email protected]> |
| 5 | * Huiwen Ren <[email protected]> |
| 6 | * |
| 7 | * This file is part of FFmpeg. |
| 8 | * |
| 9 | * FFmpeg is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU Lesser General Public |
| 11 | * License as published by the Free Software Foundation; either |
| 12 | * version 2.1 of the License, or (at your option) any later version. |
| 13 | * |
| 14 | * FFmpeg is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with FFmpeg; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | */ |
| 23 | |
| 24 | #include "libavcodec/avs3.h" |
| Andreas Rheinhardt | 70a90fb | 2022-02-04 14:43:14 | [diff] [blame] | 25 | #include "libavcodec/startcode.h" |
| hwren | ff74ad2 | 2020-10-05 12:10:45 | [diff] [blame] | 26 | #include "avformat.h" |
| 27 | #include "rawdec.h" |
| 28 | |
| 29 | static int avs3video_probe(const AVProbeData *p) |
| 30 | { |
| 31 | const uint8_t *ptr = p->buf, *end = p->buf + p->buf_size; |
| 32 | uint32_t code = -1; |
| 33 | uint8_t state = 0; |
| 34 | int pic = 0, seq = 0, slice_pos = 0; |
| 35 | int ret = 0; |
| 36 | |
| 37 | while (ptr < end) { |
| 38 | ptr = avpriv_find_start_code(ptr, end, &code); |
| 39 | state = code & 0xFF; |
| 40 | if ((code & 0xFFFFFF00) == 0x100) { |
| 41 | if (state < AVS3_SEQ_START_CODE) { |
| 42 | if (code < slice_pos) |
| 43 | return 0; |
| 44 | slice_pos = code; |
| 45 | } else { |
| 46 | slice_pos = 0; |
| 47 | } |
| 48 | if (state == AVS3_SEQ_START_CODE) { |
| 49 | seq++; |
| 50 | if (*ptr != AVS3_PROFILE_BASELINE_MAIN && *ptr != AVS3_PROFILE_BASELINE_MAIN10) |
| 51 | return 0; |
| 52 | } else if (AVS3_ISPIC(state)) { |
| 53 | pic++; |
| 54 | } else if ((state == AVS3_UNDEF_START_CODE) || |
| 55 | (state > AVS3_VIDEO_EDIT_CODE)) { |
| 56 | return 0; |
| 57 | } |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | if (seq && pic && av_match_ext(p->filename, "avs3")) { |
| 62 | ret = AVPROBE_SCORE_MAX; |
| 63 | } |
| 64 | |
| 65 | return ret; |
| 66 | } |
| 67 | |
| 68 | FF_DEF_RAWVIDEO_DEMUXER(avs3, "raw AVS3-P2/IEEE1857.10", avs3video_probe, "avs3", AV_CODEC_ID_AVS3) |
