/*
* decode headers from one input stream
* until an End of Sequence or picture start code
* is found
*/
int Get_Hdr()
{
unsigned int code;
for (;;)
{
/* look for next_start_code */
next_start_code();
code = Get_Bits32();
switch (code)
{
case SEQUENCE_HEADER_CODE:
sequence_header();
break;
case GROUP_START_CODE:
group_of_pictures_header();
break;
case PICTURE_START_CODE:
picture_header();
return 1;
break;
case SEQUENCE_END_CODE:
return 0;
break;
default:
if (!Quiet_Flag)
fprintf(stderr,"Unexpected next_start_code %08x (ignored)\n",code);
break;
}
}
}
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);
}
