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65 lines
2.1 KiB
65 lines
2.1 KiB
4 years ago
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using System;
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namespace AX.AudioSystem
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{
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public class OpusDecoder : IDisposable
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{
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public const int FrameMaxSize = 5760;
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private IntPtr handle = IntPtr.Zero;
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private int channels;
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public OpusDecoder(SamplingRate samplingRate, Channel channels)
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{
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if (samplingRate != SamplingRate.Sampling08000 &&
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samplingRate != SamplingRate.Sampling12000 &&
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samplingRate != SamplingRate.Sampling16000 &&
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samplingRate != SamplingRate.Sampling24000 &&
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samplingRate != SamplingRate.Sampling48000)
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throw new ArgumentOutOfRangeException("samplingRate");
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if (channels != Channel.Mono && channels != Channel.Stereo)
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throw new ArgumentOutOfRangeException("channels");
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this.channels = (int)channels;
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handle = OpusNative.OpusDecoderCreate(samplingRate, channels);
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}
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public int Decode(byte[] packetData, float[] pcm)
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{
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int bandwidth = OpusNative.opus_packet_get_bandwidth(packetData);
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int samplesDecoded = 0;
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if (bandwidth == (int)OpusErrorCode.InvalidPacket)
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samplesDecoded = OpusNative.OpusDecode(handle, null, pcm, channels, 0);
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else
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samplesDecoded = OpusNative.OpusDecode(handle, packetData, pcm, channels, 0);
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return samplesDecoded;
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}
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public int Decode(byte[] packetData, short[] pcm)
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{
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int bandwidth = OpusNative.opus_packet_get_bandwidth(packetData);
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int samplesDecoded = 0;
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if (bandwidth == (int)OpusErrorCode.InvalidPacket)
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samplesDecoded = OpusNative.OpusDecode(handle, null, pcm, channels, 0);
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else
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samplesDecoded = OpusNative.OpusDecode(handle, packetData, pcm, channels, 0);
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return samplesDecoded;
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}
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public void Dispose()
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{
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if (handle != IntPtr.Zero)
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{
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OpusNative.OpusDecoderDestroy(handle);
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handle = IntPtr.Zero;
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}
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}
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}
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}
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