| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * RAW MPEG-4 video demuxer | ||
| 3 | * Copyright (c) 2006 Thijs Vermeir <thijs.vermeir@barco.com> | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include "avformat.h" | ||
| 23 | #include "rawdec.h" | ||
| 24 | |||
| 25 | #define VOS_STARTCODE 0x1B0 | ||
| 26 | #define USER_DATA_STARTCODE 0x1B2 | ||
| 27 | #define GOP_STARTCODE 0x1B3 | ||
| 28 | #define VISUAL_OBJ_STARTCODE 0x1B5 | ||
| 29 | #define VOP_STARTCODE 0x1B6 | ||
| 30 | #define SLICE_STARTCODE 0x1B7 | ||
| 31 | #define EXT_STARTCODE 0x1B8 | ||
| 32 | |||
| 33 | 7957 | static int mpeg4video_probe(const AVProbeData *probe_packet) | |
| 34 | { | ||
| 35 | 7957 | uint32_t temp_buffer = -1; | |
| 36 | 7957 | int VO = 0, VOL = 0, VOP = 0, VISO = 0, res = 0; | |
| 37 | 7957 | int res_main = 0; | |
| 38 | int i; | ||
| 39 | |||
| 40 |
2/2✓ Branch 0 taken 492938456 times.
✓ Branch 1 taken 7957 times.
|
492946413 | for (i = 0; i < probe_packet->buf_size; i++) { |
| 41 | 492938456 | temp_buffer = (temp_buffer << 8) + probe_packet->buf[i]; | |
| 42 |
2/2✓ Branch 0 taken 484290423 times.
✓ Branch 1 taken 8648033 times.
|
492938456 | if (temp_buffer & 0xfffffe00) |
| 43 | 484290423 | continue; | |
| 44 |
2/2✓ Branch 0 taken 8103003 times.
✓ Branch 1 taken 545030 times.
|
8648033 | if (temp_buffer < 2) |
| 45 | 8103003 | continue; | |
| 46 | |||
| 47 |
2/2✓ Branch 0 taken 234 times.
✓ Branch 1 taken 544796 times.
|
545030 | if (temp_buffer == VOP_STARTCODE) |
| 48 | 234 | VOP++; | |
| 49 |
2/2✓ Branch 0 taken 841 times.
✓ Branch 1 taken 543955 times.
|
544796 | else if (temp_buffer == VISUAL_OBJ_STARTCODE) |
| 50 | 841 | VISO++; | |
| 51 |
4/4✓ Branch 0 taken 51727 times.
✓ Branch 1 taken 492228 times.
✓ Branch 2 taken 34876 times.
✓ Branch 3 taken 16851 times.
|
543955 | else if (temp_buffer >= 0x100 && temp_buffer < 0x120) |
| 52 | 34876 | VO++; | |
| 53 |
4/4✓ Branch 0 taken 16851 times.
✓ Branch 1 taken 492228 times.
✓ Branch 2 taken 1392 times.
✓ Branch 3 taken 15459 times.
|
509079 | else if (temp_buffer >= 0x120 && temp_buffer < 0x130) |
| 54 | 1392 | VOL++; | |
| 55 |
4/4✓ Branch 0 taken 507585 times.
✓ Branch 1 taken 102 times.
✓ Branch 2 taken 295 times.
✓ Branch 3 taken 507290 times.
|
507687 | else if (temp_buffer == SLICE_STARTCODE || temp_buffer == EXT_STARTCODE) |
| 56 | 397 | res_main++; | |
| 57 |
6/6✓ Branch 0 taken 6962 times.
✓ Branch 1 taken 500328 times.
✓ Branch 2 taken 6308 times.
✓ Branch 3 taken 654 times.
✓ Branch 4 taken 6298 times.
✓ Branch 5 taken 500338 times.
|
507290 | else if (!(0x1AF < temp_buffer && temp_buffer < 0x1B7) && |
| 58 |
2/2✓ Branch 0 taken 5582 times.
✓ Branch 1 taken 716 times.
|
6298 | !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) |
| 59 | 505920 | res++; | |
| 60 | } | ||
| 61 | |||
| 62 | // res_main represents the reserved codes within the "main" profile, they are | ||
| 63 | // added to the reserved ones if it appears that this is a "main" profile | ||
| 64 | // stream | ||
| 65 |
3/4✓ Branch 0 taken 297 times.
✓ Branch 1 taken 7660 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 297 times.
|
7957 | if (res_main && 2*res_main < VOP) |
| 66 | ✗ | res += res_main; | |
| 67 | |||
| 68 |
9/10✓ Branch 0 taken 7693 times.
✓ Branch 1 taken 264 times.
✓ Branch 2 taken 7120 times.
✓ Branch 3 taken 573 times.
✓ Branch 4 taken 7120 times.
✗ Branch 5 not taken.
✓ Branch 6 taken 67 times.
✓ Branch 7 taken 7053 times.
✓ Branch 8 taken 57 times.
✓ Branch 9 taken 10 times.
|
7957 | if (VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res == 0) |
| 69 |
2/2✓ Branch 0 taken 9 times.
✓ Branch 1 taken 48 times.
|
57 | return VOP+VO > 4 ? AVPROBE_SCORE_EXTENSION : AVPROBE_SCORE_EXTENSION/2; |
| 70 | |||
| 71 |
9/10✓ Branch 0 taken 7636 times.
✓ Branch 1 taken 264 times.
✓ Branch 2 taken 7063 times.
✓ Branch 3 taken 573 times.
✓ Branch 4 taken 7063 times.
✗ Branch 5 not taken.
✓ Branch 6 taken 10 times.
✓ Branch 7 taken 7053 times.
✓ Branch 8 taken 5 times.
✓ Branch 9 taken 5 times.
|
7900 | if (VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && VOP+VO > 4) |
| 72 | 5 | return AVPROBE_SCORE_EXTENSION/10; | |
| 73 | 7895 | return 0; | |
| 74 | } | ||
| 75 | |||
| 76 | FF_DEF_RAWVIDEO_DEMUXER2(m4v, "raw MPEG-4 video", mpeg4video_probe, "m4v", | ||
| 77 | AV_CODEC_ID_MPEG4, AVFMT_GENERIC_INDEX | AVFMT_TS_DISCONT) | ||
| 78 |