public PcmWrapper(PcmWrapper source)
{
EncodeHeader(source.GetHeader());
Payload = new byte[source.Payload.Length];
Buffer.BlockCopy(source.Payload, 0, Payload, 0, source.Payload.Length);
}
public void Combine(PcmWrapper source)
{
lock (_lock)
{
byte[] payload = new byte[Payload.Length + source.Payload.Length];
Buffer.BlockCopy(Payload, 0, payload, 0, Payload.Length);
Buffer.BlockCopy(source.Payload, 0, payload, Payload.Length, source.Payload.Length);
Payload = payload;
SubChunk2Size = payload.Length;
ChunkSize = 36 + payload.Length;
}
}
public static void SaveFile(PcmWrapper data, string saveName)
{
byte[] save = data.Encode();
FileInfo info = new FileInfo(saveName);
if (!info.Directory.Exists)
info.Directory.Create();
using (BinaryWriter writer = new BinaryWriter(new FileStream(saveName, FileMode.Create)))
{
writer.Write(save);
}
}
public static int? GetFirstSilence(PcmWrapper pcm, float startSecond, float endSecond,
float minPauseLength, float maxPauseLength, int noiseLevel)
{
int lowFrequency = -noiseLevel;
int highFrequency = noiseLevel;
int startSearch = (int)(startSecond * pcm.ByteRate);
if (startSearch < 0) startSearch = 0;
startSearch += startSearch % 2;
int endSearch = (int)(endSecond * pcm.ByteRate);
int minSilenceThreshold = (int)(minPauseLength * pcm.ByteRate);
int maxSilenceThreshold = (int)(maxPauseLength * pcm.ByteRate);
byte[] payload = pcm.GetPayload();
if (minPauseLength == 0)
{
int ret = startSearch;
ret -= (ret % 2);
return ret;
}
int silenceStart = 0;
int silenceCount = 0;
float maxSilence = 0f;
List<short> shorts = new List<short>();
for (int j = startSearch; j < endSearch && j < payload.Length - 1; j += 2)
{
short snd = ComplementToSigned(j, payload);
if (silenceCount >= maxSilenceThreshold)
{
int ret = silenceStart + (silenceCount / 2);
ret -= (ret % 2);
return ret;
}
else if (snd > lowFrequency && snd < highFrequency)
{
if (silenceCount == 0)
{
silenceStart = j;
}
silenceCount += 2;
}
else if (silenceCount >= minSilenceThreshold)
{
int ret = silenceStart + (silenceCount / 2);
ret -= (ret % 2);
return ret;
}
else
{
maxSilence = Math.Max(silenceCount, maxSilence);
silenceCount = 0;
}
shorts.Add(snd);
}
return null;
}
private void HandleInputAudio(int index, TywiAudioStream stream, DeviceProfile device)
{
byte[] content = stream.ReadAudio();
if (content != null && content.Length > 0)
{
PcmWrapper wrapper = new PcmWrapper(content, 16000, 1, 16);
_service.PostAudio(wrapper.Encode(), device);
}
}
