Ryujinx/Ryujinx.HLE/HOS/Services/Aud/IHardwareOpusDecoderManager.cs
gdkchan b833183ef6 HwOpus service implementation (#201)
* Started to implement the hwopus service

* Write outputs on decode method, some basic error handling

* Fix buffer size read from header and check

* Fix order of values
2018-11-17 04:36:49 +01:00

72 lines
2.2 KiB
C#

using Ryujinx.HLE.HOS.Ipc;
using System.Collections.Generic;
namespace Ryujinx.HLE.HOS.Services.Aud
{
class IHardwareOpusDecoderManager : IpcService
{
private Dictionary<int, ServiceProcessRequest> m_Commands;
public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => m_Commands;
public IHardwareOpusDecoderManager()
{
m_Commands = new Dictionary<int, ServiceProcessRequest>()
{
{ 0, Initialize },
{ 1, GetWorkBufferSize }
};
}
public long Initialize(ServiceCtx Context)
{
int SampleRate = Context.RequestData.ReadInt32();
int ChannelsCount = Context.RequestData.ReadInt32();
MakeObject(Context, new IHardwareOpusDecoder(SampleRate, ChannelsCount));
return 0;
}
public long GetWorkBufferSize(ServiceCtx Context)
{
//Note: The sample rate is ignored because it is fixed to 48KHz.
int SampleRate = Context.RequestData.ReadInt32();
int ChannelsCount = Context.RequestData.ReadInt32();
Context.ResponseData.Write(GetOpusDecoderSize(ChannelsCount));
return 0;
}
private static int GetOpusDecoderSize(int ChannelsCount)
{
const int SilkDecoderSize = 0x2198;
if (ChannelsCount < 1 || ChannelsCount > 2)
{
return 0;
}
int CeltDecoderSize = GetCeltDecoderSize(ChannelsCount);
int OpusDecoderSize = (ChannelsCount * 0x800 + 0x4807) & -0x800 | 0x50;
return OpusDecoderSize + SilkDecoderSize + CeltDecoderSize;
}
private static int GetCeltDecoderSize(int ChannelsCount)
{
const int DecodeBufferSize = 0x2030;
const int CeltDecoderSize = 0x58;
const int CeltSigSize = 0x4;
const int Overlap = 120;
const int EBandsCount = 21;
return (DecodeBufferSize + Overlap * 4) * ChannelsCount +
EBandsCount * 16 +
CeltDecoderSize +
CeltSigSize;
}
}
}