public unsafe static T Read <T>(IMemoryManager memory, long position) where T : struct
{
long size = Marshal.SizeOf <T>();
byte[] data = memory.ReadBytes(position, size);
fixed(byte *ptr = data)
{
return(Marshal.PtrToStructure <T>((IntPtr)ptr));
}
}
/// <summary>
/// Actually finds memory block for pattern
/// </summary>
/// <param name="bm">Instance of <see cref="MemoryManager"/> to use for search</param>
/// <returns>Enumerable of <see cref="IntPtr"/> with found addresses</returns>
private IEnumerable <IntPtr> FindMaskAddress(IMemoryManager bm)
{
System.Diagnostics.ProcessModule mainModule = bm.Process.MainModule;
IntPtr mainModuleBaseAddress = mainModule.BaseAddress;
long mainModuleSize = mainModule.ModuleMemorySize;
long patternLength = p_bytes.LongLength;
for (long offset = 0; offset < mainModuleSize - patternLength; offset += p_cacheSize - patternLength)
{
byte[] cacheBytes = bm.ReadBytes(mainModuleBaseAddress + (int)offset, (int)(p_cacheSize > mainModuleSize - offset ? mainModuleSize - offset : p_cacheSize));
for (uint offsetInCacheBytes = 0; offsetInCacheBytes < cacheBytes.Length - patternLength; offsetInCacheBytes++)
{
if (DataCompare(cacheBytes, offsetInCacheBytes))
{
yield return(mainModuleBaseAddress + (int)(offset + offsetInCacheBytes));
}
}
}
}
private void UpdateBuffer(IMemoryManager memory)
{
// TODO: Implement conversion for formats other
// than interleaved stereo (2 channels).
// As of now, it assumes that HostChannelsCount == 2.
WaveBuffer wb = WaveBuffers[_bufferIndex];
if (wb.Position == 0)
{
_samples = new int[0];
return;
}
if (SampleFormat == SampleFormat.PcmInt16)
{
int samplesCount = (int)(wb.Size / (sizeof(short) * ChannelsCount));
_samples = new int[samplesCount * AudioRendererConsts.HostChannelsCount];
if (ChannelsCount == 1)
{
for (int index = 0; index < samplesCount; index++)
{
short sample = memory.ReadInt16(wb.Position + index * 2);
_samples[index * 2 + 0] = sample;
_samples[index * 2 + 1] = sample;
}
}
else
{
for (int index = 0; index < samplesCount * 2; index++)
{
_samples[index] = memory.ReadInt16(wb.Position + index * 2);
}
}
}
else if (SampleFormat == SampleFormat.Adpcm)
{
byte[] buffer = memory.ReadBytes(wb.Position, wb.Size);
_samples = AdpcmDecoder.Decode(buffer, AdpcmCtx);
}
else
{
throw new InvalidOperationException();
}
if (SampleRate != AudioRendererConsts.HostSampleRate)
{
// TODO: We should keep the frames being discarded (see the 4 below)
// on a buffer and include it on the next samples buffer, to allow
// the resampler to do seamless interpolation between wave buffers.
int samplesCount = _samples.Length / AudioRendererConsts.HostChannelsCount;
samplesCount = Math.Max(samplesCount - 4, 0);
_samples = Resampler.Resample2Ch(
_samples,
SampleRate,
AudioRendererConsts.HostSampleRate,
samplesCount,
ref _resamplerFracPart);
}
}
