public GameActor(GameSample gs, string name)
: base(name)
{
this.gs = gs;
}
public GameSamples()
{
sample[0] = new GameSample(1);
}
static GameSample read_wav_sample(object f)
{
uint offset = 0;
uint length=0, rate=0, filesize, temp32;
ushort bits=0, temp16=0;
byte[] buf = new byte[32];
GameSample result;
/* read the core header and make sure it's a WAVE file */
offset += (uint)osd_fread(f, buf, 4);
if (offset < 4)
return null;
if (!Encoding.Default.GetString(buf).StartsWith("RIFF"))
return null;
/* get the total size */
offset += (uint)osd_fread(f, buf, 4);
if (offset < 8)
return null;
filesize = (uint)BitConverter.ToInt32(buf, 0);
/* read the RIFF file type and make sure it's a WAVE file */
offset += (uint)osd_fread(f, buf, 4);
if (offset < 12)
return null;
if (!Encoding.Default.GetString(buf).StartsWith("WAVE"))
return null;
/* seek until we find a format tag */
while (true)
{
offset += (uint)osd_fread(f, buf, 4);
offset += (uint)osd_fread(f, ref length, 4);
//length = intelLong(length);
if (Encoding.Default.GetString(buf).StartsWith("fmt "))
break;
/* seek to the next block */
osd_fseek(f, (int)length, SEEK_CUR);
offset += length;
if (offset >= filesize)
return null;
}
/* read the format -- make sure it is PCM */
offset +=(uint) osd_fread_lsbfirst(f, ref temp16, 2);
if (temp16 != 1)
return null;
/* number of channels -- only mono is supported */
offset += (uint)osd_fread_lsbfirst(f, ref temp16, 2);
if (temp16 != 1)
return null;
/* sample rate */
offset += (uint)osd_fread(f, ref rate, 4);
//rate = intelLong(rate);
/* bytes/second and block alignment are ignored */
offset += (uint)osd_fread(f, buf, 6);
/* bits/sample */
offset += (uint)osd_fread_lsbfirst(f, ref bits, 2);
if (bits != 8 && bits != 16)
return null;
/* seek past any extra data */
osd_fseek(f,(int) length - 16, SEEK_CUR);
offset += length - 16;
/* seek until we find a data tag */
while (true)
{
offset += (uint)osd_fread(f, buf, 4);
offset += (uint)osd_fread(f, ref length, 4);
//length = intelLong(length);
if (Encoding.Default.GetString(buf).StartsWith("data"))
break;
/* seek to the next block */
osd_fseek(f, (int)length, SEEK_CUR);
offset += length;
if (offset >= filesize)
return null;
}
/* allocate the game sample */
result = new GameSample((int)length);
/* fill in the sample data */
result.length = (int)length;
result.smpfreq = (int)rate;
result.resolution = bits;
/* read the data in */
if (bits == 8)
{
osd_fread(f, result.data, (int)length);
/* convert 8-bit data to signed samples */
for (temp32 = 0; temp32 < length; temp32++)
{
//sbyte b = (sbyte)result.data[temp32];
//b ^= unchecked((sbyte)0x80);
//result.data[temp32] = (byte)b;
result.data[temp32] ^= 0x80;
}
}
else
{
/* 16-bit data is fine as-is */
osd_fread_lsbfirst(f, result.data, (int)length);
}
return result;
}
public GameSamples(int size)
{
sample = new GameSample[size];
for (int i = 0; i < size; i++)
sample[i] = new GameSample(1);
}