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using ComLight;
using System.Runtime.InteropServices;
namespace Whisper
{
/// <summary>A buffer with a chunk of audio.</summary>
/// <remarks>Note the interface supports both marshaling directions.<br/>
/// I have not tested, but you should be able to implement this interface in C#, to supply PCM audio data to the native code</remarks>
[ComInterface( "013583aa-c9eb-42bc-83db-633c2c317051", eMarshalDirection.BothWays )]
public interface iAudioBuffer: IDisposable
{
/// <summary>Count of samples in the buffer</summary>
int countSamples();
/// <summary>Unmanaged pointer to the internal buffer containing single-channel FP32 samples.</summary>
/// <remarks>If you implementing this interface in C# and your audio data is on the managed heap, use <see cref="GCHandle" /> to make sure it doesn't move.<br/>
/// Or better yet, move the data to unmanaged buffer allocated with <see cref="Marshal.AllocHGlobal(int)" /> or <see cref="Marshal.AllocCoTaskMem(int)" /> method.</remarks>
IntPtr getPcmMono();
/// <summary>Unmanaged pointer to the internal buffer containing stereo FP32 samples.</summary>
/// <remarks>When the buffer doesn’t have stereo data, the method gonna return <see cref="IntPtr.Zero" />.</remarks>
IntPtr getPcmStereo();
/// <summary>Start time of the buffer, relative to the start of the media</summary>
void getTime( out TimeSpan time );
}
}
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