Initial checkin: wrapper for Christopher Key's HDCD decoder

2025-12-16 18:14:25 +00:00 · 2008-11-04 01:17:42 +00:00
parent 5a92dc8b84
commit bbb87a2d49
3 changed files with 401 additions and 0 deletions
--- a/HDCDDotNet/HDCDDotNet.cs
+++ b/HDCDDotNet/HDCDDotNet.cs
@@ -0,0 +1,265 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Runtime.InteropServices;
+using AudioCodecsDotNet;
+
+namespace HDCDDotNet
+{
+	/** \brief Statistics for decoding. */
+	[StructLayout(LayoutKind.Sequential)]
+	public struct hdcd_decoder_statistics
+	{
+		public UInt32 num_packets;
+		/**<Total number of samples processed. */
+		public bool enabled_peak_extend;
+		/**< True if peak extend was enabled during decoding. */
+		public bool disabled_peak_extend;
+		/**< True if peak extend was disabled during decoding. */
+		public double min_gain_adjustment;
+		/**< Minimum dynamic gain used during decoding. */
+		public double max_gain_adjustment;
+		/**< Maximum dynamic gain used during decoding. */
+		public bool enabled_transient_filter;
+		/**< True if the transient filter was enabled during decoding. */
+		public bool disabled_transient_filter;
+		/**< True if the transient filter was disabled during decoding. */
+	};
+
+	public class HDCDDotNet
+	{
+		public HDCDDotNet (Int16 channels, Int32 sample_rate, bool decode)
+		{
+			_decoder = IntPtr.Zero;
+#if !MONO
+			_decoder = hdcd_decoder_new();
+			_channelCount = channels;
+			if (_decoder == IntPtr.Zero)
+				throw new Exception("Failed to initialize HDCD decoder.");
+			bool b = true;
+			b &= hdcd_decoder_set_num_channels(_decoder, channels);
+			b &= hdcd_decoder_set_sample_rate(_decoder, sample_rate);
+			b &= hdcd_decoder_set_input_bps(_decoder, 16);
+			b &= hdcd_decoder_set_output_bps(_decoder, 24);
+			if (!b)
+				throw new Exception("Failed to set up HDCD _decoder parameters.");
+			_decoderCallback = decode ? new hdcd_decoder_write_callback(DecoderCallback) : null;
+			_gch = GCHandle.Alloc(this);
+			hdcd_decoder_init_status status = hdcd_decoder_init(_decoder, IntPtr.Zero, _decoderCallback, (IntPtr) _gch);
+			switch (status)
+			{
+				case hdcd_decoder_init_status.HDCD_DECODER_INIT_STATUS_OK:
+					break;
+				case hdcd_decoder_init_status.HDCD_DECODER_INIT_STATUS_MEMORY_ALOCATION_ERROR:
+					throw new Exception("Memory allocation error.");
+				case hdcd_decoder_init_status.HDCD_DECODER_INIT_STATUS_INVALID_NUM_CHANNELS:
+					throw new Exception("Invalid number of channels.");
+				case hdcd_decoder_init_status.HDCD_DECODER_INIT_STATUS_INVALID_SAMPLE_RATE:
+					throw new Exception("Invalid sample rate.");
+				default:
+					throw new Exception("Unknown error(" + status.ToString() + ").");
+			}
+#else
+			throw new Exception("HDCD unsupported.");
+#endif
+		}
+
+		public bool Detected
+		{
+			get
+			{
+#if !MONO
+				return hdcd_decoder_detected_hdcd(_decoder);
+#else
+				throw new Exception("HDCD unsupported.");
+#endif
+			}
+		}
+
+		public int Channels
+		{
+			get
+			{
+				return _channelCount;
+			}
+		}
+
+		public void Reset()
+		{
+#if !MONO
+			if (!hdcd_decoder_reset(_decoder))
+#endif
+				throw new Exception("error resetting decoder.");
+		}
+
+		public void GetStatistics(out hdcd_decoder_statistics stats)
+		{
+#if !MONO
+			IntPtr _statsPtr = hdcd_decoder_get_statistics(_decoder);
+#else
+			IntPtr _statsPtr = IntPtr.Zero;
+#endif
+			if (_statsPtr == IntPtr.Zero)
+				throw new Exception("HDCD statistics error.");
+			stats = (hdcd_decoder_statistics) Marshal.PtrToStructure(_statsPtr, typeof(hdcd_decoder_statistics));
+		}
+
+		public void Process(int[,] sampleBuffer, uint sampleCount)
+		{
+#if !MONO
+			if (!hdcd_decoder_process_buffer_interleaved(_decoder, sampleBuffer, (int) sampleCount))
+				throw new Exception("HDCD processing error.");
+#endif
+		}
+
+		public void Process(byte[] buff, uint sampleCount)
+		{
+			if (_inSampleBuffer == null || _inSampleBuffer.GetLength(0) < sampleCount)
+				_inSampleBuffer = new int[sampleCount, _channelCount];
+			AudioCodecsDotNet.AudioCodecsDotNet.BytesToFLACSamples_16(buff, 0, _inSampleBuffer, 0, sampleCount, _channelCount);
+			Process(_inSampleBuffer, sampleCount);
+		}
+
+		public void Flush ()
+		{
+#if !MONO
+			if (!hdcd_decoder_flush_buffer(_decoder))
+#endif
+				throw new Exception("error flushing buffer.");
+		}
+
+		public IAudioDest AudioDest
+		{
+			get
+			{
+				return _audioDest;
+			}
+			set
+			{
+				//if (hdcd_decoder_get_state(_decoder) == hdcd_decoder_state.HDCD_DECODER_STATE_DIRTY) 
+				//    Flush(); /* Flushing is currently buggy! Doesn't work twice, and can't continue after flush! */
+				_audioDest = value;
+			}
+		}
+
+		/** \brief Return values from hdcd_decoder_init. */
+		private enum hdcd_decoder_init_status
+		{
+			HDCD_DECODER_INIT_STATUS_OK = 0,
+			/**< Initialization was successful. */
+			HDCD_DECODER_INIT_STATUS_INVALID_STATE,
+			/**< The _decoder was already initialised. */
+			HDCD_DECODER_INIT_STATUS_MEMORY_ALOCATION_ERROR,
+			/**< Initialization failed due to a memory allocation error. */
+			HDCD_DECODER_INIT_STATUS_INVALID_NUM_CHANNELS,
+			/**< Initialization failed because the configured number of channels was invalid. */
+			HDCD_DECODER_INIT_STATUS_INVALID_SAMPLE_RATE,
+			/**< Initialization failed because the configured sample rate was invalid. */
+			HDCD_DECODER_INIT_STATUS_INVALID_INPUT_BPS,
+			/**< Initialization failed because the configured input bits per sample was invalid. */
+			HDCD_DECODER_INIT_STATUS_INVALID_OUTPUT_BPS
+			/**< Initialization failed because the configured output bits per sample was invalid. */
+		}
+
+		/** \brief State values for a decoder.
+		 *
+		 * The decoder's state can be obtained by calling hdcd_decoder_get_state().
+		 */
+		private enum hdcd_decoder_state
+		{
+			HDCD_DECODER_STATE_UNINITIALISED = 1,
+			/**< The decoder is uninitialised. */
+			HDCD_DECODER_STATE_READY,
+			/**< The decoder is initialised and ready to process data. */
+			HDCD_DECODER_STATE_DIRTY,
+			/**< The decoder has processed data, but has not yet been flushed. */
+			HDCD_DECODER_STATE_FLUSHED,
+			/**< The decoder has been flushed. */
+			HDCD_DECODER_STATE_WRITE_ERROR,
+			/**< An error was returned by the write callback. */
+			HDCD_DECODER_STATE_MEMORY_ALOCATION_ERROR
+			/**< Processing failed due to a memory allocation error. */
+		};
+
+		private IntPtr _decoder;
+		private int[,] _inSampleBuffer;
+		private int[,] _outSampleBuffer;
+		private int _channelCount;
+		hdcd_decoder_write_callback _decoderCallback;
+		IAudioDest _audioDest;
+		GCHandle _gch;
+
+		~HDCDDotNet()
+		{
+#if !MONO
+			if (_decoder != IntPtr.Zero) 
+				hdcd_decoder_delete(_decoder);
+			_gch.Free();
+#endif
+		}
+
+		private delegate bool hdcd_decoder_write_callback(IntPtr decoder, IntPtr buffer, int samples, IntPtr client_data);
+
+		private unsafe bool Output(IntPtr buffer, int samples)
+		{
+			if (AudioDest == null)
+				return true;
+
+			if (_outSampleBuffer == null || _outSampleBuffer.GetLength(0) < samples)
+				_outSampleBuffer = new int[samples, _channelCount];
+
+			int loopCount = samples * _channelCount;
+			int* pInSamples = (int*)buffer;
+			fixed (int* pOutSamplesFixed = &_outSampleBuffer[0, 0])
+			{
+				int* pOutSamples = pOutSamplesFixed;
+				for (int i = 0; i < loopCount; i++)
+					*(pOutSamples++) = *(pInSamples++);
+			}
+			AudioDest.Write(_outSampleBuffer, (uint)samples);
+			return true;
+		}
+
+		private static unsafe bool DecoderCallback(IntPtr decoder, IntPtr buffer, int samples, IntPtr client_data)
+		{
+			GCHandle gch = (GCHandle)client_data;
+			HDCDDotNet hdcd = (HDCDDotNet)gch.Target;
+			return hdcd.Output(buffer, samples);
+		}
+
+#if !MONO
+		[DllImport("hdcd.dll")] 
+		private static extern IntPtr hdcd_decoder_new ();
+		[DllImport("hdcd.dll")] 
+		private static extern void hdcd_decoder_delete(IntPtr decoder);
+		[DllImport("hdcd.dll")]
+		private static extern hdcd_decoder_state hdcd_decoder_get_state(IntPtr decoder);
+		[DllImport("hdcd.dll")] 
+		private static extern bool hdcd_decoder_set_num_channels (IntPtr decoder, Int16 num_channels);
+		//HDCD_API uint16_t hdcd_decoder_get_num_channels(const hdcd_decoder *const _decoder);
+		[DllImport("hdcd.dll")] 
+		private static extern bool hdcd_decoder_set_sample_rate(IntPtr decoder, Int32 sample_rate);
+		//HDCD_API uint32_t hdcd_decoder_get_sample_rate(const hdcd_decoder *const _decoder);
+		[DllImport("hdcd.dll")] 
+		private static extern bool hdcd_decoder_set_input_bps(IntPtr decoder, Int16 input_bps);
+		//HDCD_API uint16_t hdcd_decoder_get_input_bps(const hdcd_decoder *const _decoder);
+		[DllImport("hdcd.dll")] 
+		private static extern bool hdcd_decoder_set_output_bps(IntPtr decoder, Int16 output_bps);
+		//HDCD_API uint16_t hdcd_decoder_get_output_bps(const hdcd_decoder *const _decoder);
+		[DllImport("hdcd.dll")] 
+		private static extern hdcd_decoder_init_status hdcd_decoder_init (IntPtr decoder, IntPtr unused, hdcd_decoder_write_callback write_callback, IntPtr client_data);
+		[DllImport("hdcd.dll")] 
+		private static extern bool hdcd_decoder_finish(IntPtr decoder);
+		[DllImport("hdcd.dll")] 
+		private static extern bool hdcd_decoder_process_buffer_interleaved(IntPtr decoder, [In, Out] int [,] input_buffer, Int32 samples);
+		[DllImport("hdcd.dll")]
+		private static extern bool hdcd_decoder_flush_buffer(IntPtr decoder);
+		[DllImport("hdcd.dll")]
+		private static extern bool hdcd_decoder_reset(IntPtr decoder);
+		[DllImport("hdcd.dll")] 
+		private static extern bool hdcd_decoder_detected_hdcd(IntPtr decoder);
+		[DllImport("hdcd.dll")] 
+		private static extern IntPtr hdcd_decoder_get_statistics(IntPtr decoder);
+#endif
+	}
+}
--- a/HDCDDotNet/HDCDDotNet.csproj
+++ b/HDCDDotNet/HDCDDotNet.csproj
@@ -0,0 +1,101 @@
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>HDCDDotNet</RootNamespace>
+    <AssemblyName>HDCDDotNet</AssemblyName>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
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+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
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+    <OutputPath>bin\Release\</OutputPath>
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+    <CodeAnalysisModuleSuppressionsFile>GlobalSuppressions.cs</CodeAnalysisModuleSuppressionsFile>
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+    <CodeAnalysisModuleSuppressionsFile>GlobalSuppressions.cs</CodeAnalysisModuleSuppressionsFile>
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+    <CodeAnalysisRuleAssemblies>C:\Program Files (x86)\Microsoft Visual Studio 8\Team Tools\Static Analysis Tools\FxCop\\rules</CodeAnalysisRuleAssemblies>
+    <CodeAnalysisUseTypeNameInSuppression>true</CodeAnalysisUseTypeNameInSuppression>
+    <CodeAnalysisModuleSuppressionsFile>GlobalSuppressions.cs</CodeAnalysisModuleSuppressionsFile>
+    <ErrorReport>prompt</ErrorReport>
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+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x86' ">
+    <OutputPath>..\bin\Win32\Release\</OutputPath>
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+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="HDCDDotNet.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\AudioCodecsDotNet\AudioCodecsDotNet.csproj">
+      <Project>{6458A13A-30EF-45A9-9D58-E5031B17BEE2}</Project>
+      <Name>AudioCodecsDotNet</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
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+  -->
+</Project>
--- a/HDCDDotNet/Properties/AssemblyInfo.cs
+++ b/HDCDDotNet/Properties/AssemblyInfo.cs
@@ -0,0 +1,35 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("HDCDDotNet")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("HDCDDotNet")]
+[assembly: AssemblyCopyright("")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("818197e9-ebd3-4de7-905d-ffbb0e058c08")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Revision and Build Numbers 
+// by using the '*' as shown below:
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]