public void QueuePCM(byte[] buffer, int bufferSize)
{
AudioFlags flags = AudioFlags.None;
if (_audioInfo.is16Bits)
{
flags |= AudioFlags.Is16Bits;
}
if (_audioInfo.isStereo)
{
flags |= AudioFlags.Stereo;
}
_audioStream.QueueBuffer(buffer, bufferSize, true, flags);
}
public void QueueAudioFromSector(Stream sector)
{
sector.Seek(24, SeekOrigin.Begin);
// This XA audio is different (yet similar) from normal XA audio! Watch out!
// TODO: It's probably similar enough to normal XA that we can merge it somehow...
// TODO: RTZ PSX needs the same audio code in a regular AudioStream class. Probably
// will do something similar to QuickTime and creating a base class 'ISOMode2Parser'
// or something similar.
sector.Read(_buf, 0, AUDIO_DATA_CHUNK_SIZE);
int channels = _audStream.IsStereo ? 2 : 1;
var dst = _dst;
var buf = _buf;
Array.Clear(_dst, 0, _dst.Length);
var leftChannel = 0;
var rightChannel = 1;
for (var src = 0; src < AUDIO_DATA_CHUNK_SIZE; src += 128)
{
for (int i = 0; i < 4; i++)
{
int shift = 12 - (buf[src + 4 + i * 2] & 0xf);
int filter = buf[src + 4 + i * 2] >> 4;
int f0 = _xaTable[filter, 0];
int f1 = _xaTable[filter, 1];
int s_1 = _adpcmStatus[0].sample[0];
int s_2 = _adpcmStatus[0].sample[1];
for (int j = 0; j < 28; j++)
{
byte d = buf[src + 16 + i + j * 4];
int t = (sbyte)(d << 4) >> 4;
int s = (t << shift) + ((s_1 * f0 + s_2 * f1 + 32) >> 6);
s_2 = s_1;
s_1 = (short)ScummHelper.Clip(s, short.MinValue, short.MaxValue);
dst.WriteInt16(leftChannel * 2, (short)s_1);
leftChannel += channels;
}
if (channels == 2)
{
_adpcmStatus[0].sample[0] = (short)s_1;
_adpcmStatus[0].sample[1] = (short)s_2;
s_1 = _adpcmStatus[1].sample[0];
s_2 = _adpcmStatus[1].sample[1];
}
shift = 12 - (buf[src + 5 + i * 2] & 0xf);
filter = buf[src + 5 + i * 2] >> 4;
f0 = _xaTable[filter, 0];
f1 = _xaTable[filter, 1];
for (int j = 0; j < 28; j++)
{
var d = buf[src + 16 + i + j * 4];
int t = (sbyte)d >> 4;
int s = (t << shift) + ((s_1 * f0 + s_2 * f1 + 32) >> 6);
s_2 = s_1;
s_1 = (short)ScummHelper.Clip(s, short.MinValue, short.MaxValue);
if (channels == 2)
{
dst.WriteInt16(rightChannel * 2, (short)s_1);
rightChannel += 2;
}
else
{
dst.WriteInt16(leftChannel * 2, (short)s_1);
leftChannel++;
}
}
if (channels == 2)
{
_adpcmStatus[1].sample[0] = (short)s_1;
_adpcmStatus[1].sample[1] = (short)s_2;
}
else
{
_adpcmStatus[0].sample[0] = (short)s_1;
_adpcmStatus[0].sample[1] = (short)s_2;
}
}
}
var flags = AudioFlags.Is16Bits;
if (_audStream.IsStereo)
{
flags |= AudioFlags.Stereo;
}
if (BitConverter.IsLittleEndian)
{
flags |= AudioFlags.LittleEndian;
}
_audStream.QueueBuffer(dst, AUDIO_DATA_SAMPLE_COUNT * 2, true, flags);
}