46 lines
1.4 KiB
Plaintext
46 lines
1.4 KiB
Plaintext
////////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// File: SoundDeviceContract.sg - Contract between apps and sound devices
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//
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using System;
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using System.Runtime.InteropServices;
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using Microsoft.SingSharp;
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using Microsoft.Singularity;
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using Microsoft.Singularity.Channels;
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using Microsoft.Singularity.Io;
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namespace Microsoft.Singularity.Io
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{
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public contract SoundDeviceContract : DeviceContract {
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in message PlayPcm(byte* opt(ExHeap[]) buffer,
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int offset,
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int length,
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ushort sampleRate,
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bool stereo,
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bool signed,
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bool eightBit);
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out message AckPlayPcm(byte[]! in ExHeap buffer);
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out message NakPlayPcm(byte[]! in ExHeap buffer);
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in message PlayWav(byte[]! in ExHeap buffer);
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out message AckPlayWav(byte[]! in ExHeap buffer);
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out message NakPlayWav(byte[]! in ExHeap buffer);
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out message Success();
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override state Start: one {
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Success! -> Ready;
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}
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state Ready: one {
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PlayPcm? -> (AckPlayPcm! or NakPlayPcm!) -> Ready;
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PlayWav? -> (AckPlayWav! or NakPlayWav!) -> Ready;
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}
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}
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}
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