| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * RAW MPEG video demuxer | ||
| 3 | * Copyright (c) 2002-2003 Fabrice Bellard | ||
| 4 | * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> | ||
| 5 | * | ||
| 6 | * This file is part of FFmpeg. | ||
| 7 | * | ||
| 8 | * FFmpeg is free software; you can redistribute it and/or | ||
| 9 | * modify it under the terms of the GNU Lesser General Public | ||
| 10 | * License as published by the Free Software Foundation; either | ||
| 11 | * version 2.1 of the License, or (at your option) any later version. | ||
| 12 | * | ||
| 13 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 16 | * Lesser General Public License for more details. | ||
| 17 | * | ||
| 18 | * You should have received a copy of the GNU Lesser General Public | ||
| 19 | * License along with FFmpeg; if not, write to the Free Software | ||
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 21 | */ | ||
| 22 | |||
| 23 | #include "avformat.h" | ||
| 24 | #include "rawdec.h" | ||
| 25 | |||
| 26 | #include "libavutil/intreadwrite.h" | ||
| 27 | #include "libavcodec/startcode.h" | ||
| 28 | |||
| 29 | #define SEQ_START_CODE 0x000001b3 | ||
| 30 | #define GOP_START_CODE 0x000001b8 | ||
| 31 | #define PICTURE_START_CODE 0x00000100 | ||
| 32 | #define SLICE_START_CODE 0x00000101 | ||
| 33 | #define PACK_START_CODE 0x000001ba | ||
| 34 | #define VIDEO_ID 0x000001e0 | ||
| 35 | #define AUDIO_ID 0x000001c0 | ||
| 36 | |||
| 37 | 8140 | static int mpegvideo_probe(const AVProbeData *p) | |
| 38 | { | ||
| 39 | 8140 | uint32_t code= -1; | |
| 40 | 8140 | int pic=0, seq=0, slice=0, pspack=0, vpes=0, apes=0, res=0, sicle=0; | |
| 41 | 8140 | const uint8_t *ptr = p->buf, *end = ptr + p->buf_size; | |
| 42 | 8140 | uint32_t last = 0; | |
| 43 | int j; | ||
| 44 | |||
| 45 |
2/2✓ Branch 0 taken 63210 times.
✓ Branch 1 taken 8140 times.
|
71350 | while (ptr < end) { |
| 46 | 63210 | ptr = avpriv_find_start_code(ptr, end, &code); | |
| 47 |
2/2✓ Branch 0 taken 55126 times.
✓ Branch 1 taken 8084 times.
|
63210 | if ((code & 0xffffff00) == 0x100) { |
| 48 |
5/5✓ Branch 0 taken 399 times.
✓ Branch 1 taken 19215 times.
✓ Branch 2 taken 99 times.
✓ Branch 3 taken 265 times.
✓ Branch 4 taken 35148 times.
|
55126 | switch(code){ |
| 49 | 399 | case SEQ_START_CODE: | |
| 50 |
2/2✓ Branch 0 taken 14 times.
✓ Branch 1 taken 385 times.
|
399 | if (!(ptr[3 + 1 + 2] & 0x20)) |
| 51 | 14 | break; | |
| 52 | 385 | j = -1; | |
| 53 |
2/2✓ Branch 0 taken 40 times.
✓ Branch 1 taken 345 times.
|
385 | if (ptr[j + 8] & 2) |
| 54 | 40 | j+= 64; | |
| 55 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 385 times.
|
385 | if (j >= end - ptr) |
| 56 | ✗ | break; | |
| 57 |
2/2✓ Branch 0 taken 58 times.
✓ Branch 1 taken 327 times.
|
385 | if (ptr[j + 8] & 1) |
| 58 | 58 | j+= 64; | |
| 59 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 385 times.
|
385 | if (j >= end - ptr) |
| 60 | ✗ | break; | |
| 61 |
2/2✓ Branch 0 taken 87 times.
✓ Branch 1 taken 298 times.
|
385 | if (AV_RB24(ptr + j + 9) & 0xFFFFFE) |
| 62 | 87 | break; | |
| 63 | 298 | seq++; | |
| 64 | 298 | break; | |
| 65 | 19215 | case PICTURE_START_CODE: pic++; break; | |
| 66 | 99 | case PACK_START_CODE: pspack++; break; | |
| 67 | 265 | case 0x1b6: | |
| 68 | 265 | res++; break; | |
| 69 | } | ||
| 70 |
4/4✓ Branch 0 taken 35911 times.
✓ Branch 1 taken 19215 times.
✓ Branch 2 taken 27022 times.
✓ Branch 3 taken 8889 times.
|
55126 | if (code >= SLICE_START_CODE && code <= 0x1af) { |
| 71 |
4/4✓ Branch 0 taken 23749 times.
✓ Branch 1 taken 3273 times.
✓ Branch 2 taken 21985 times.
✓ Branch 3 taken 1764 times.
|
27022 | if (last >= SLICE_START_CODE && last <= 0x1af) { |
| 72 |
2/2✓ Branch 0 taken 17999 times.
✓ Branch 1 taken 3986 times.
|
21985 | if (code >= last) slice++; |
| 73 | 3986 | else sicle++; | |
| 74 | }else{ | ||
| 75 |
2/2✓ Branch 0 taken 875 times.
✓ Branch 1 taken 4162 times.
|
5037 | if (code == SLICE_START_CODE) slice++; |
| 76 | 4162 | else sicle++; | |
| 77 | } | ||
| 78 | } | ||
| 79 |
2/2✓ Branch 0 taken 1104 times.
✓ Branch 1 taken 54022 times.
|
55126 | if ((code & 0x1f0) == VIDEO_ID) vpes++; |
| 80 |
2/2✓ Branch 0 taken 1597 times.
✓ Branch 1 taken 52425 times.
|
54022 | else if((code & 0x1e0) == AUDIO_ID) apes++; |
| 81 | 55126 | last = code; | |
| 82 | } | ||
| 83 | } | ||
| 84 |
12/14✓ Branch 0 taken 287 times.
✓ Branch 1 taken 7853 times.
✓ Branch 2 taken 284 times.
✓ Branch 3 taken 3 times.
✓ Branch 4 taken 276 times.
✓ Branch 5 taken 8 times.
✓ Branch 6 taken 262 times.
✓ Branch 7 taken 14 times.
✓ Branch 8 taken 262 times.
✗ Branch 9 not taken.
✓ Branch 10 taken 242 times.
✓ Branch 11 taken 20 times.
✓ Branch 12 taken 242 times.
✗ Branch 13 not taken.
|
8140 | if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !apes && !res && slice > sicle) { |
| 85 |
2/2✓ Branch 0 taken 11 times.
✓ Branch 1 taken 231 times.
|
242 | if(vpes) return AVPROBE_SCORE_EXTENSION / 4; |
| 86 |
2/2✓ Branch 0 taken 55 times.
✓ Branch 1 taken 176 times.
|
231 | else return pic>1 ? AVPROBE_SCORE_EXTENSION + 1 : AVPROBE_SCORE_EXTENSION / 2; // +1 for .mpg |
| 87 | } | ||
| 88 | 7898 | return 0; | |
| 89 | } | ||
| 90 | |||
| 91 | FF_DEF_RAWVIDEO_DEMUXER(mpegvideo, "raw MPEG video", mpegvideo_probe, NULL, AV_CODEC_ID_MPEG1VIDEO) | ||
| 92 |