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A utility program to dump sector information, to make sure we know what is wrong !

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This commit is contained in:
Vincent Fourmond 2013-01-04 00:27:30 +01:00
parent 6d8d06f5e7
commit cd8b66e39b
2 changed files with 90 additions and 1 deletions
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3
Makefile.am
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# Declaration of the programs:
bin_PROGRAMS = dvdcopy
bin_PROGRAMS = dvdcopy secdump
dvdcopy_SOURCES = src/main.cc src/headers.hh \
src/dvdcopy.hh src/dvdcopy.cc \
src/dvdoutfile.hh src/dvdoutfile.cc \
src/dvdreader.hh src/dvdreader.cc
secdump_SOURCES = src/secdump.cc

88
src/secdump.cc Normal file
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/**
\file secdump.cc
secdump, a file to dump sector information from stdin to stdout
Copyright Vincent Fourmond, 2012
This is dvdcopy, a wrapper around libreaddvd facilities for
reading DVDs.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA
*/
#include <stdio.h>
#include <stdint.h>
#define SECTOR_SIZE 2048
/// This comes from dvdauthor
int64_t readpts(unsigned char *buf)
{
int64_t a1,a2,a3,pts;
a1=(buf[0]&0xf)>>1;
a2=((buf[1]<<8)|buf[2])>>1;
a3=((buf[3]<<8)|buf[4])>>1;
pts=(((int64_t)a1)<<30)|
(a2<<15)|
a3;
return pts;
}
/// This comes from dvdauthor
int64_t readscr(const unsigned char *buf)
/* returns the timestamp as found in the pack header. This is actually supposed to
be units of a 27MHz clock, but I ignore the extra precision and truncate it to
the usual 90kHz clock units. */
{
return
((int64_t)(buf[0] & 0x38)) << 27 /* SCR 32 .. 30 */
|
(buf[0] & 3) << 28 /* SCR 29 .. 28 */
|
buf[1] << 20 /* SCR 27 .. 20 */
|
(buf[2] & 0xf8) << 12 /* SCR 19 .. 15 */
|
(buf[2] & 3) << 13 /* SCR 14 .. 13 */
|
buf[3] << 5 /* SCR 12 .. 5 */
|
(buf[4] & 0xf8) >> 3; /* SCR 4 .. 0 */
/* ignore SCR_ext */
}
// Many useful information come from:
// http://stnsoft.com/DVD/packhdr.html
// http://stnsoft.com/DVD/pes-hdr.html
int main(int argc, char ** argv)
{
unsigned char buffer[SECTOR_SIZE];
long nb = 0;
while(! feof(stdin)) {
fread(buffer, sizeof(buffer), 1, stdin);
long int scr = readscr(buffer + 4);
int first_pes_offset = 13 + (buffer[13] & 0x7);
if(buffer[2] == 1 && buffer[first_pes_offset + 3] == 1)
printf("%7ld: 0x01%hhX, SCR: %9ld -- PES: 0x01%hhX\n",
nb, buffer[3], scr, buffer[first_pes_offset + 4]);
else
printf("%7ld: invalid\n", nb);
nb++;
}
}