diff options
Diffstat (limited to 'libavformat/mpegvideodec.c')
| -rw-r--r-- | libavformat/mpegvideodec.c | 34 |
1 files changed, 24 insertions, 10 deletions
diff --git a/libavformat/mpegvideodec.c b/libavformat/mpegvideodec.c index 87e5e038c6..471d2f4d94 100644 --- a/libavformat/mpegvideodec.c +++ b/libavformat/mpegvideodec.c @@ -3,20 +3,20 @@ * Copyright (c) 2002-2003 Fabrice Bellard * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -34,8 +34,9 @@ static int mpegvideo_probe(AVProbeData *p) { uint32_t code= -1; - int pic=0, seq=0, slice=0, pspack=0, pes=0; + int pic=0, seq=0, slice=0, pspack=0, vpes=0, apes=0, res=0, sicle=0; int i; + uint32_t last = 0; for(i=0; i<p->buf_size; i++){ code = (code<<8) + p->buf[i]; @@ -43,15 +44,28 @@ static int mpegvideo_probe(AVProbeData *p) switch(code){ case SEQ_START_CODE: seq++; break; case PICTURE_START_CODE: pic++; break; - case SLICE_START_CODE: slice++; break; case PACK_START_CODE: pspack++; break; + case 0x1b6: + res++; break; } - if ((code & 0x1f0) == VIDEO_ID) pes++; - else if((code & 0x1e0) == AUDIO_ID) pes++; + if (code >= SLICE_START_CODE && code <= 0x1af) { + if (last >= SLICE_START_CODE && last <= 0x1af) { + if (code >= last) slice++; + else sicle++; + }else{ + if (code == SLICE_START_CODE) slice++; + else sicle++; + } + } + if ((code & 0x1f0) == VIDEO_ID) vpes++; + else if((code & 0x1e0) == AUDIO_ID) apes++; + last = code; } } - if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes) - return pic>1 ? AVPROBE_SCORE_MAX/2+1 : AVPROBE_SCORE_MAX/4; // +1 for .mpg + if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !apes && !res && slice > sicle) { + if(vpes) return AVPROBE_SCORE_MAX/8; + else return pic>1 ? AVPROBE_SCORE_MAX/2+1 : AVPROBE_SCORE_MAX/4; // +1 for .mpg + } return 0; } |