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namespace Ryujinx.Audio
{
/// <summary>
/// Define constants used by the audio system.
/// </summary>
public static class Constants
{
/// <summary>
/// The default device output name.
/// </summary>
public const string DefaultDeviceOutputName = "DeviceOut";
/// <summary>
/// The default device input name.
/// </summary>
public const string DefaultDeviceInputName = "BuiltInHeadset";
/// <summary>
/// The maximum number of channels supported. (6 channels for 5.1 surround)
/// </summary>
public const int ChannelCountMax = 6;
/// <summary>
/// The maximum number of channels supported per voice.
/// </summary>
public const int VoiceChannelCountMax = ChannelCountMax;
/// <summary>
/// The maximum count of mix buffer supported per operations (volumes, mix effect, ...)
/// </summary>
public const int MixBufferCountMax = 24;
/// <summary>
/// The maximum count of wavebuffer per voice.
/// </summary>
public const int VoiceWaveBufferCount = 4;
/// <summary>
/// The maximum count of biquad filter per voice.
/// </summary>
public const int VoiceBiquadFilterCount = 2;
/// <summary>
/// The lowest priority that a voice can have.
/// </summary>
public const int VoiceLowestPriority = 0xFF;
/// <summary>
/// The highest priority that a voice can have.
/// </summary>
/// <remarks>Voices with the highest priority will not be dropped if a voice drop needs to occur.</remarks>
public const int VoiceHighestPriority = 0;
/// <summary>
/// Maximum <see cref="Common.BehaviourParameter.ErrorInfo"/> that can be returned by <see cref="Parameter.BehaviourErrorInfoOutStatus"/>.
/// </summary>
public const int MaxErrorInfos = 10;
/// <summary>
/// Default alignment for buffers.
/// </summary>
public const int BufferAlignment = 0x40;
/// <summary>
/// Alignment required for the work buffer.
/// </summary>
public const int WorkBufferAlignment = 0x1000;
/// <summary>
/// Alignment required for every performance metrics frame.
/// </summary>
public const int PerformanceMetricsPerFramesSizeAlignment = 0x100;
/// <summary>
/// The id of the final mix.
/// </summary>
public const int FinalMixId = 0;
/// <summary>
/// The id defining an unused mix id.
/// </summary>
public const int UnusedMixId = int.MaxValue;
/// <summary>
/// The id defining an unused splitter id as a signed integer.
/// </summary>
public const int UnusedSplitterIdInt = -1;
/// <summary>
/// The id defining an unused splitter id.
/// </summary>
public const uint UnusedSplitterId = uint.MaxValue;
/// <summary>
/// The id of invalid/unused node id.
/// </summary>
public const int InvalidNodeId = -268435456;
/// <summary>
/// The indice considered invalid for processing order.
/// </summary>
public const int InvalidProcessingOrder = -1;
/// <summary>
/// The maximum number of audio renderer sessions allowed to be created system wide.
/// </summary>
public const int AudioRendererSessionCountMax = 2;
/// <summary>
/// The maximum number of audio output sessions allowed to be created system wide.
/// </summary>
public const int AudioOutSessionCountMax = 12;
/// <summary>
/// The maximum number of audio input sessions allowed to be created system wide.
/// </summary>
public const int AudioInSessionCountMax = 4;
/// <summary>
/// Maximum buffers supported by one audio device session.
/// </summary>
public const int AudioDeviceBufferCountMax = 32;
/// <summary>
/// The target sample rate of the audio renderer. (48kHz)
/// </summary>
public const uint TargetSampleRate = 48000;
/// <summary>
/// The target sample size of the audio renderer. (PCM16)
/// </summary>
public const int TargetSampleSize = sizeof(ushort);
/// <summary>
/// The target sample count per audio renderer update.
/// </summary>
public const int TargetSampleCount = 240;
/// <summary>
/// The size of an upsampler entry to process upsampling to <see cref="TargetSampleRate"/>.
/// </summary>
public const int UpSampleEntrySize = TargetSampleCount * VoiceChannelCountMax;
/// <summary>
/// The target audio latency computed from <see cref="TargetSampleRate"/> and <see cref="TargetSampleCount"/>.
/// </summary>
public const int AudioProcessorMaxUpdateTimeTarget = 1000000000 / ((int)TargetSampleRate / TargetSampleCount); // 5.00 ms
/// <summary>
/// The maximum update time of the DSP on original hardware.
/// </summary>
public const int AudioProcessorMaxUpdateTime = 5760000; // 5.76 ms
/// <summary>
/// The maximum update time per audio renderer session.
/// </summary>
public const int AudioProcessorMaxUpdateTimePerSessions = AudioProcessorMaxUpdateTime / AudioRendererSessionCountMax;
/// <summary>
/// Guest timer frequency used for system ticks.
/// </summary>
public const int TargetTimerFrequency = 19200000;
/// <summary>
/// The default coefficients used for standard 5.1 surround to stereo downmixing.
/// </summary>
public static readonly float[] DefaultSurroundToStereoCoefficients = new float[4]
{
1.0f,
0.707f,
0.251f,
0.707f,
};
}
}
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