// Return TRUE if all was read. FALSE if a problem occured:
// If a bitstream syntax problem occured the bitstream will
// point to after the problem, in case we run out of data the bitstream
// will point to where we want to restart after getting more.
static int read_eau_info(struct bitstream *esstream, int udtype)
{
dbg_print(DMT_VERBOSE, "Read Extension and User Info\n");
// We only get here after seeing that start code
unsigned char *tst = next_bytes(esstream, 4);
if (!tst || tst[0]!=0x00 || tst[1]!=0x00 || tst[2]!=0x01
|| (tst[3]!=0xB2 && tst[3]!=0xB5) ) // (0x000001 B2||B5)
fatal(EXIT_BUG_BUG, "Impossible!");
// The following extension_and_user_data() function makes sure that
// user data is not evaluated twice. Should the function run out of
// data it will make sure that esstream points to where we want to
// continue after getting more.
if( !extension_and_user_data(esstream, udtype) )
{
if (esstream->error)
dbg_print(DMT_VERBOSE, "\nWarning: Retry while reading Extension and User Data!\n");
else
dbg_print(DMT_VERBOSE, "\nBitstream problem while reading Extension and User Data!\n");
return 0;
}
dbg_print(DMT_VERBOSE, "Read Extension and User Info - processed\n\n");
return 1;
}
// Return TRUE if all was read. FALSE if a problem occured:
// If a bitstream syntax problem occured the bitstream will
// point to after the problem, in case we run out of data the bitstream
// will point to where we want to restart after getting more.
static int read_eau_info(struct lib_cc_decode* ctx, struct bitstream *esstream, int udtype, struct cc_subtitle *sub)
{
debug("Read Extension and User Info\n");
// We only get here after seeing that start code
unsigned char *tst = next_bytes(esstream, 4);
if (!tst || tst[0]!=0x00 || tst[1]!=0x00 || tst[2]!=0x01
|| (tst[3]!=0xB2 && tst[3]!=0xB5) ) // (0x000001 B2||B5)
fatal(CCX_COMMON_EXIT_BUG_BUG, "read_eau_info: Impossible values for tst. Please file a bug report in GitHub.\n");
// The following extension_and_user_data() function makes sure that
// user data is not evaluated twice. Should the function run out of
// data it will make sure that esstream points to where we want to
// continue after getting more.
if( !extension_and_user_data(ctx, esstream, udtype, sub) )
{
if (esstream->error)
debug("\nWarning: Retry while reading Extension and User Data!\n");
else
debug("\nBitstream problem while reading Extension and User Data!\n");
return 0;
}
debug("Read Extension and User Info - processed\n\n");
return 1;
}
int main(int argc, char* argv[])
{
char tmpStr[256];
col = 0;
verbose_level = 1;
sequence_headers = 0;
sequence_extensions = 0;
user_data_bytes = 0;
sequence_scalable_extension_present = 0;
printf("bbVINFO - version 1.7, by Brent Beyeler ([email protected])\n");
printf(" speed increases by, Apachez and Christian Vogelgsang\n\n");
if (argc < 2)
{
printf("\nbbVINFO is an MPEG video stream analyzer\n\n");
printf("Usage: bbVINFO MPEG video filename <verbose level 1..3, default = 1>\n\n");
printf("Examples:\n");
printf(" To list all packet start codes (excluding slice codes) to file test.txt\n");
printf(" bbVINFO test.mpg 1 > test.txt\n\n");
printf(" To list all packets (excluding slice packets) in detail\n");
printf(" bbVINFO test.vob 2\n\n");
printf(" To list all packets (including slice packets) in detail to file test.txt\n");
printf(" bbVINFO test.mpg 3 > test.txt\n\n");
exit (1);
}
init_getbits(argv[1]);
strcpy(tmpStr, argv[1]);
// strlwr(tmpStr);
if (argc > 2)
{
sscanf(argv[2], "%d", &verbose_level);
if (verbose_level < 1)
verbose_level = 1;
if (verbose_level > 3)
verbose_level = 3;
}
next_start_code();
if (getbits(8) != SEQUENCE_HEADER_CODE)
{
printf("\nFile is not an MPEG Video Stream\n");
exit(1);
}
next_start_code();
if (getbits(8) != EXTENSION_START_CODE)
mpeg2 = 0;
else
mpeg2 = 1;
printf("\nFile %s is an MPEG-%d video stream\n", argv[1], mpeg2 + 1);
finish_getbits();
init_getbits(argv[1]);
next_start_code();
sequence_header();
if (mpeg2)
sequence_extension();
do
{
extension_and_user_data(0);
do
{
if (nextbits(8) == GROUP_START_CODE)
{
group_of_pictures_header();
extension_and_user_data(1);
}
picture_header();
if (mpeg2)
picture_coding_extension();
extension_and_user_data(2);
picture_data();
} while ((nextbits(8) == PICTURE_START_CODE) ||
(nextbits(8) == GROUP_START_CODE));
if (nextbits(8) != SEQUENCE_END_CODE)
{
sequence_header();
if (mpeg2)
sequence_extension();
}
} while (nextbits(8) != SEQUENCE_END_CODE);
zprintf(1, "\nsequence_end_code = 0x000001%02X\n", getbits(8));
finish_getbits();
return (0);
}
