diff options
author | Christophe Grenier <grenier@cgsecurity.org> | 2013-03-23 14:47:39 +0100 |
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committer | Christophe Grenier <grenier@cgsecurity.org> | 2013-03-23 14:47:39 +0100 |
commit | 1c24eb562c99321f98280dc937a9affb4de7f025 (patch) | |
tree | 992f50ff7e5a659cd5ab8973ee3077bfacf918da /src/file_ddf.c | |
parent | 0f70bee69a6ce66c2b2798d09235439924906a0b (diff) |
PhotoRec: better for .ddf detection. Add support for DDF_05
Diffstat (limited to 'src/file_ddf.c')
-rw-r--r-- | src/file_ddf.c | 123 |
1 files changed, 94 insertions, 29 deletions
diff --git a/src/file_ddf.c b/src/file_ddf.c index 63335f7..f6db68d 100644 --- a/src/file_ddf.c +++ b/src/file_ddf.c @@ -32,6 +32,7 @@ #endif #include "types.h" #include "filegen.h" +#include "common.h" static void register_header_check_ddf(file_stat_t *file_stat); @@ -45,41 +46,105 @@ const file_hint_t file_hint_ddf= { .register_header_check=®ister_header_check_ddf }; -static const unsigned char ddf3_header[4]= { - 'D' , 'D' , 'F' , 0x03 -}; -static const unsigned char ddf4_header[4]= { - 'D' , 'D' , 'F' , 0x04 -}; +struct MasterHeader +{ + uint32_t m_nVersion; // VERSION_DDF_03 = 0x03464444 + uint32_t m_nFrameTotal; + uint32_t m_nFrameRate; // requested frame rate...actual rate may differ + uint32_t m_bHighResolution; + uint32_t m_nNumRawBeams; // Std HF = 96, Std LF and LR HF/LF = 48, may be 64 or 128 if v5 + float m_fSampleRate; // dependent on Window Length + uint32_t m_nSamplesPerChannel; // always 512 + uint32_t m_nReceiverGain; // relative value, 0-40 dB + uint32_t m_nWindowStart; // code: value in master header is initial value + uint32_t m_nWindowLength; // code: value in master header is initial value + uint32_t m_bReverse; // TRUE if lens down orientation + uint32_t m_nSN; // serial number of sonar + char m_cDate[32]; // date string + char m_cHeaderID[256]; // annotation string + int32_t m_iUserID1; // Four user ID values displayed in header pane + int32_t m_iUserID2; // These values are inserted by user external via + int32_t m_iUserID3; // the Edit->Header ID command + int32_t m_iUserID4; + uint32_t m_nStartFrame; // for snippet or truncated file, from source file + uint32_t m_nEndFrame; // for snippet or truncated file, from source file + uint32_t m_bTimeLapse; // flag for time lapse data recording + uint32_t m_nRecordInterval; // interval between saved frames (N seconds) + int32_t m_iRadioSeconds; // 0 = N frames interval, 1 = N seconds interval + uint32_t m_nFrameInterval; // interval between saved frames (N frames) + uint32_t m_nFlags; // save displayed processing flags (see Table 1) + uint32_t m_nAuxFlags; // types of aux information present (see Table 2) + uint32_t m_nSspd; // sound velocity in water from DidsonV6.ini + uint32_t m_n3DFlags; // reserved...currently unused + /* Fields for v4 are added here*/ + char m_cRsvdData[120]; // (120) pad to 512 bytes +} __attribute__ ((__packed__)); + +static int header_check_aux(const unsigned char *buffer, file_recovery_t *file_recovery_new) +{ + reset_file_recovery(file_recovery_new); + file_recovery_new->extension=file_hint_ddf.extension; + if(buffer[0x43]=='-' && buffer[0x46]=='-' && buffer[0x49]=='_') + { + struct tm tm_time; + memset(&tm_time, 0, sizeof(tm_time)); + tm_time.tm_sec=(buffer[0x4e]-'0')*10+(buffer[0x4f]-'0'); /* seconds 0-59 */ + tm_time.tm_min=(buffer[0x4c]-'0')*10+(buffer[0x4d]-'0'); /* minutes 0-59 */ + tm_time.tm_hour=(buffer[0x4a]-'0')*10+(buffer[0x4b]-'0'); /* hours 0-23*/ + tm_time.tm_mday=(buffer[0x47]-'0')*10+(buffer[0x48]-'0'); /* day of the month 1-31 */ + tm_time.tm_mon=(buffer[0x44]-'0')*10+(buffer[0x45]-'0')-1; /* month 0-11 */ + tm_time.tm_year=(buffer[0x3f]-'0')*1000+(buffer[0x40]-'0')*100+ + (buffer[0x41]-'0')*10+(buffer[0x42]-'0')-1900; /* year */ + tm_time.tm_isdst = -1; /* unknown daylight saving time */ + file_recovery_new->time=mktime(&tm_time); + } + return 1; +} + +static int header_check_ddf3(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new) +{ + const struct MasterHeader *h=(const struct MasterHeader *)buffer; + if(le32(h->m_nNumRawBeams)!=96 && le32(h->m_nNumRawBeams)!=48) + return 0; + if(le32(h->m_nSamplesPerChannel)!=512) + return 0; + return header_check_aux(buffer, file_recovery_new); +} + +static int header_check_ddf4(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new) +{ + const struct MasterHeader *h=(const struct MasterHeader *)buffer; + if(le32(h->m_nNumRawBeams)!=96 && le32(h->m_nNumRawBeams)!=48) + return 0; + if(le32(h->m_nSamplesPerChannel)!=512) + return 0; + return header_check_aux(buffer, file_recovery_new); +} -static int header_check_ddf(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new) +static int header_check_ddf5(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new) { - if(memcmp(buffer, ddf3_header, sizeof(ddf3_header))==0 || - memcmp(buffer, ddf4_header, sizeof(ddf4_header))==0) + const struct MasterHeader *h=(const struct MasterHeader *)buffer; + switch(le32(h->m_nNumRawBeams)) { - reset_file_recovery(file_recovery_new); - file_recovery_new->extension=file_hint_ddf.extension; - if(buffer[0x43]=='-' && buffer[0x46]=='-' && buffer[0x49]=='_') - { - struct tm tm_time; - memset(&tm_time, 0, sizeof(tm_time)); - tm_time.tm_sec=(buffer[0x4e]-'0')*10+(buffer[0x4f]-'0'); /* seconds 0-59 */ - tm_time.tm_min=(buffer[0x4c]-'0')*10+(buffer[0x4d]-'0'); /* minutes 0-59 */ - tm_time.tm_hour=(buffer[0x4a]-'0')*10+(buffer[0x4b]-'0'); /* hours 0-23*/ - tm_time.tm_mday=(buffer[0x47]-'0')*10+(buffer[0x48]-'0'); /* day of the month 1-31 */ - tm_time.tm_mon=(buffer[0x44]-'0')*10+(buffer[0x45]-'0')-1; /* month 0-11 */ - tm_time.tm_year=(buffer[0x3f]-'0')*1000+(buffer[0x40]-'0')*100+ - (buffer[0x41]-'0')*10+(buffer[0x42]-'0')-1900; /* year */ - tm_time.tm_isdst = -1; /* unknown daylight saving time */ - file_recovery_new->time=mktime(&tm_time); - } - return 1; + case 48: + case 96: + case 64: + case 128: + break; + default: + return 0; } - return 0; + if(le32(h->m_nSamplesPerChannel)<512 || le32(h->m_nSamplesPerChannel)>4096) + return 0; + return header_check_aux(buffer, file_recovery_new); } static void register_header_check_ddf(file_stat_t *file_stat) { - register_header_check(0, ddf3_header, sizeof(ddf3_header), &header_check_ddf, file_stat); - register_header_check(0, ddf4_header, sizeof(ddf4_header), &header_check_ddf, file_stat); + static const unsigned char ddf3_header[4]= { 'D' , 'D' , 'F' , 0x03 }; + static const unsigned char ddf4_header[4]= { 'D' , 'D' , 'F' , 0x04 }; + static const unsigned char ddf5_header[4]= { 'D' , 'D' , 'F' , 0x05 }; + register_header_check(0, ddf3_header, sizeof(ddf3_header), &header_check_ddf3, file_stat); + register_header_check(0, ddf4_header, sizeof(ddf4_header), &header_check_ddf4, file_stat); + register_header_check(0, ddf5_header, sizeof(ddf5_header), &header_check_ddf5, file_stat); } |