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keep some of the more basic looking bitstreams (eg. char 959) aligned, although this is likely wrong.

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This commit is contained in:
David Haywood 2013-03-04 17:26:34 +00:00
parent b03e58e43f
commit ec5d17d46a
1 changed files with 35 additions and 15 deletions
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50
src/mame/drivers/gunpey.c
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@ -767,8 +767,8 @@ data: 000101010 001011011 010100010 110010110 110010110 110010110 110010110 1100
int count = 0;
printf("data: ");
const int show_bytes = 0;
int bitspacer = 0;
int bitspace = 9;
//int bitspacer = 0;
//int bitspace = 9;
int linespacer = 0;
#endif
@ -791,8 +791,28 @@ data: 000101010 001011011 010100010 110010110 110010110 110010110 110010110 1100
for (;;)
{
int data = gunpey_state_get_stream_bits(8);
int test = gunpey_state_get_stream_bits(2);
int data;
int getbits;
// don't think this is right.. just keeps some streams in alignment, see 959 in char test for example
if (test==0x0)
{
getbits = 7;
}
else if (test==0x1)
{
getbits = 5;
}
else if (test==0x2)
{
getbits = 5;
}
else if (test==0x3)
{
getbits = 7;
}
data = gunpey_state_get_stream_bits(getbits);
// hack, really I imagine there is exactly enough compressed data to fill the dest bitmap area when decompressed, but to stop us
// overrunning into reading other data we terminate on a 0000, which doesn't seem likely to be compressed data.
if (data==0x00 && lastdata == 0x00)
@ -815,19 +835,19 @@ data: 000101010 001011011 010100010 110010110 110010110 110010110 110010110 1100
}
else
{
for (int z=0;z<8;z++)
printf("%1x-", test);
for (int z=0;z<getbits;z++)
{
printf("%d", (data>>(7-z))&1);
bitspacer++;
if (bitspacer == bitspace)
{
linespacer++;
if ((linespacer%16) == 0) printf("\n");
printf(" ");
bitspacer = 0;
}
printf("%d", (data>>((getbits-1)-z))&1);
}
linespacer++;
if ((linespacer%16) == 0) printf("\n");
printf(" ");
}
count++;
}