[CommandHipc(7)] // 12.0.0+
// GetWorkBufferSizeForMultiStreamEx(buffer<unknown<0x118>, 0x19>) -> u32
public ResultCode GetWorkBufferSizeForMultiStreamEx(ServiceCtx context)
{
ulong parametersAddress = context.Request.PtrBuff[0].Position;
OpusMultiStreamParametersEx parameters = context.Memory.Read <OpusMultiStreamParametersEx>(parametersAddress);
int opusDecoderSize = GetOpusMultistreamDecoderSize(parameters.NumberOfStreams, parameters.NumberOfStereoStreams);
int frameSizeMono48KHz = parameters.Flags.HasFlag(OpusDecoderFlags.LargeFrameSize) ? 5760 : 1920;
int streamSize = BitUtils.AlignUp(parameters.NumberOfStreams * 1500, 64);
int frameSize = BitUtils.AlignUp(parameters.ChannelsCount * frameSizeMono48KHz / (48000 / parameters.SampleRate), 64);
int totalSize = opusDecoderSize + streamSize + frameSize;
context.ResponseData.Write(totalSize);
return(ResultCode.Success);
}
[CommandHipc(6)] // 12.0.0+
// InitializeForMultiStreamEx(u32, handle<copy>, buffer<unknown<0x118>, 0x19>) -> object<nn::codec::detail::IHardwareOpusDecoder>
public ResultCode InitializeForMultiStreamEx(ServiceCtx context)
{
ulong parametersAddress = context.Request.PtrBuff[0].Position;
OpusMultiStreamParametersEx parameters = context.Memory.Read <OpusMultiStreamParametersEx>(parametersAddress);
byte[] mappings = MemoryMarshal.Cast <uint, byte>(parameters.ChannelMappings.AsSpan()).ToArray();
// UseLargeFrameSize can be ignored due to not relying on fixed size buffers for storing the decoded result.
MakeObject(context, new IHardwareOpusDecoder(
parameters.SampleRate,
parameters.ChannelsCount,
parameters.NumberOfStreams,
parameters.NumberOfStereoStreams,
parameters.Flags,
mappings));
// Close transfer memory immediately as we don't use it.
context.Device.System.KernelContext.Syscall.CloseHandle(context.Request.HandleDesc.ToCopy[0]);
return(ResultCode.Success);
}
