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PhotoRec: fix MPEG-1 system header start code detection

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This commit is contained in:
Christophe Grenier 2009-10-25 18:27:20 +01:00
parent 7cf77194c3
commit a4c75d5c74
1 changed files with 4 additions and 1 deletions
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5
src/file_mpg.c
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@ -103,7 +103,10 @@ static int header_check_mpg(const unsigned char *buffer, const unsigned int buff
/* MPEG-1 system header start code */
(buffer[3]==0xBB && (buffer[6]&0x80)==0x80 && (buffer[8]&0x01)==0x01) ||
/* MPEG-1 sequence header code, horizontal size>0 && vertical size>0, bitrate!=0 */
(buffer[3]==0xB3 && (buffer[4]<<8)+(buffer[5]>>8)>0 && (buffer[5]<<8)+buffer[6]>0 && buffer[8]!=0) ||
(buffer[3]==0xB3 &&
(buffer[4]<<4)+(buffer[5]>>4)>0 &&
((buffer[5]&&0x0f)<<4)+buffer[6]>0 &&
buffer[8]!=0) ||
/* ISO/IEC 14496-2 (MPEG-4 video) ELEMENTARY VIDEO HEADER - visual object sequence start code */
(buffer[3]==0xB0) ||
/* ISO/IEC 14496-2 (MPEG-4 video) ELEMENTARY VIDEO HEADER - visual object start code */