/// <summary>
/// 获取音频
/// </summary>
/// <param name="id"></param>
/// <param name="flag"></param>
/// <param name="source"></param>
public static void GetAudioPacket(int id, int flag, byte[] source)
{
CompressPacket packet = AudioDecoder(source);
byte[] data = new byte[packet.DataLength];
Buffer.BlockCopy(packet.Data, 0, data, 0, packet.CompLength);
float[] sample = Speex.DeCompress(data, packet.CompLength);
AudioCache Cache = null;
if (AudioCacheDic.Keys.Contains(id))
{
Cache = AudioCacheDic[id];
}
else
{
//最大接收人数限制
if (AudioCacheDic.Count < MaxSpeakNum)
{
Cache = new AudioCache(id, flag);
AudioCacheDic.Add(id, Cache);
}
}
#if DEBUG
Debug.Log("UpdateAudioLength: " + packet.AudioLength);
#endif
if (Cache != null)
{
Cache.UpData(flag, packet.AudioLength, sample);
}
//#if DEBUG
// Debug.Log("接收：" + Cache.data.Count);
//#endif
}
static CompressPacket AudioDecoder(byte[] buffer, int offest = 0)
{
CompressPacket packet = new CompressPacket();
packet.CompLength = BitConverter.ToInt32(buffer, offest);
packet.DataLength = BitConverter.ToInt32(buffer, offest + 4);
packet.AudioLength = BitConverter.ToSingle(buffer, offest + 8);
packet.Data = new byte[packet.CompLength];
Buffer.BlockCopy(buffer, offest + 12, packet.Data, 0, packet.CompLength);
return(packet);
}
byte[] AudioEncoder(CompressPacket packet)
{
//留出前三个int32长度分别存 压缩长度 压缩后数据长度 录音长度
byte[] buffer = new byte[12 + packet.Data.Length];
byte[] lengthBuffer = BitConverter.GetBytes(packet.CompLength);
Buffer.BlockCopy(lengthBuffer, 0, buffer, 0, lengthBuffer.Length);
byte[] dataLengtBuffer = BitConverter.GetBytes(packet.DataLength);
Buffer.BlockCopy(dataLengtBuffer, 0, buffer, 4, dataLengtBuffer.Length);
byte[] audioLengthBuffer = BitConverter.GetBytes(packet.AudioLength);
Buffer.BlockCopy(audioLengthBuffer, 0, buffer, 8, audioLengthBuffer.Length);
//三个int32长度之后写入音频数据
for (int iter = 0; iter < packet.Data.Length; ++iter)
{
buffer[12 + iter] = packet.Data[iter];
}
return(buffer);
}
/// <summary>
/// 数据封装发送 flag flag 2表示取消 0表示未完成 1表示完成
/// </summary>
/// <param name="flag"></param>
/// <param name="sampleBuffer"></param>
void TransmitBuffer(int flag, float[] sampleBuffer)
{
//#if DEBUG
// Debug.Log("发送：" + (test += sampleBuffer.Length));
//#endif
int length = 0;
byte[] buffer = Speex.SpeexCompress(sampleBuffer, out length);
CompressPacket packet = new CompressPacket();
byte[] availableSampleBuffer = new byte[length];
Buffer.BlockCopy(buffer, 0, availableSampleBuffer, 0, length);
packet.AudioLength = audioLength;
packet.Data = availableSampleBuffer;
packet.CompLength = length;
packet.DataLength = buffer.Length;
if (OnReComplete != null)
{
OnReComplete(flag, AudioEncoder(packet));
}
}
