static unsafe void OnAsyncConversionComplete(
AsyncCameraImageConversionStatus status, XRCameraImageConversionParams conversionParams, IntPtr dataPtr,
int dataLength, IntPtr context)
{
var handle = GCHandle.FromIntPtr(context);
var onComplete = (Action <AsyncCameraImageConversionStatus, XRCameraImageConversionParams, NativeArray <byte> >)handle.Target;
if (onComplete != null)
{
var data = NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray <byte>(
(void *)dataPtr, dataLength, Allocator.None);
#if ENABLE_UNITY_COLLECTIONS_CHECKS
var safetyHandle = AtomicSafetyHandle.Create();
NativeArrayUnsafeUtility.SetAtomicSafetyHandle(ref data, safetyHandle);
#endif
onComplete(status, conversionParams, data);
#if ENABLE_UNITY_COLLECTIONS_CHECKS
AtomicSafetyHandle.Release(safetyHandle);
#endif
}
handle.Free();
}
/// <summary>
/// Convert the <c>XRCameraImage</c> to one of the supported formats using the specified
/// <paramref name="conversionParams"/>. The conversion is performed asynchronously. Use the returned
/// <see cref="XRAsyncCameraImageConversion"/> to check for the status of the conversion, and retrieve the data
/// when complete.
/// </summary>
/// <remarks>
/// It is safe to <c>Dispose</c> the <c>XRCameraImage</c> before the asynchronous operation has completed.
/// </remarks>
/// <param name="conversionParams">The parameters to use for the conversion.</param>
/// <returns>A <see cref="XRAsyncCameraImageConversion"/> which can be used to check the status of the
/// conversion operation and get the resulting data.</returns>
/// <seealso cref="FormatSupported"/>
public XRAsyncCameraImageConversion ConvertAsync(XRCameraImageConversionParams conversionParams)
{
ValidateNativeHandleAndThrow();
ValidateConversionParamsAndThrow(conversionParams);
return(new XRAsyncCameraImageConversion(m_CameraSubsystem, m_NativeHandle, conversionParams));
}
/// <summary>
/// Similar to <see cref="ConvertAsync(int, XRCameraImageConversionParams)"/> but takes a delegate to invoke
/// when the request is complete, rather than returning a request id.
/// </summary>
/// <remarks>
/// If the first parameter to <paramref name="callback"/> is
/// <see cref="AsyncCameraImageConversionStatus.Ready"/> then the <c>dataPtr</c> parameter must be valid for
/// the duration of the invocation. The data may be destroyed immediately upon return. The
/// <paramref name="context"/> parameter must be passed back to the <paramref name="callback"/>.
/// </remarks>
/// <param name="nativeHandle">A unique identifier for the camera image to convert.</param>
/// <param name="conversionParams">The parameters to use during the conversion.</param>
/// <param name="callback">A delegate which must be invoked when the request is complete, whether the
/// conversion was successfully or not.</param>
/// <param name="context">A native pointer which must be passed back unaltered to <paramref name="callback"/>.
/// </param>
/// <exception cref="System.NotSupportedException">Thrown if the implementation does not support camera image.
/// </exception>
internal void ConvertAsync(
int nativeHandle,
XRCameraImageConversionParams conversionParams,
OnImageRequestCompleteDelegate callback,
IntPtr context)
{
m_Provider.ConvertAsync(nativeHandle, conversionParams, callback, context);
}
/// <summary>
/// Convert the image with handle <paramref name="nativeHandle"/> using the provided
/// <see cref="XRCameraImageConversionParams"/>.
/// </summary>
/// <param name="nativeHandle">A unique identifier for the camera image to convert.</param>
/// <param name="conversionParams">The parameters to use during the conversion.</param>
/// <param name="destinationBuffer">A buffer to write the converted image to.</param>
/// <param name="bufferLength">The number of bytes available in the buffer.</param>
/// <returns>
/// <c>true</c> if the image was converted and stored in <paramref name="destinationBuffer"/>.
/// </returns>
/// <exception cref="System.NotSupportedException">Thrown if the implementation does not support camera image.
/// </exception>
internal bool TryConvert(
int nativeHandle,
XRCameraImageConversionParams conversionParams,
IntPtr destinationBuffer,
int bufferLength)
{
return(m_Provider.TryConvert(nativeHandle, conversionParams, destinationBuffer, bufferLength));
}
/// <summary>
/// Method to be implemented by the provider to similar to
/// <see cref="ConvertAsync(int, XRCameraImageConversionParams)"/> but takes a delegate to invoke when the
/// request is complete, rather than returning a request id.
/// </summary>
/// <remarks>
/// If the first parameter to <paramref name="callback"/> is
/// <see cref="AsyncCameraImageConversionStatus.Ready"/> then the <c>dataPtr</c> parameter must be valid
/// for the duration of the invocation. The data may be destroyed immediately upon return. The
/// <paramref name="context"/> parameter must be passed back to the <paramref name="callback"/>.
/// </remarks>
/// <param name="nativeHandle">A unique identifier for the camera image to convert.</param>
/// <param name="conversionParams">The parameters to use during the conversion.</param>
/// <param name="callback">A delegate which must be invoked when the request is complete, whether the
/// conversion was successfully or not.</param>
/// <param name="context">A native pointer which must be passed back unaltered to
/// <paramref name="callback"/>.</param>
/// <exception cref="System.NotSupportedException">Thrown if the implementation does not support camera
/// image.</exception>
public virtual void ConvertAsync(
int nativeHandle,
XRCameraImageConversionParams conversionParams,
OnImageRequestCompleteDelegate callback,
IntPtr context)
{
throw new NotSupportedException("camera image conversion is not supported by this implementation");
}
/// <summary>
/// Method to be implemented by the provider to convert the image with handle
/// <paramref name="nativeHandle"/> using the provided <paramref cref="conversionParams"/>.
/// </summary>
/// <param name="nativeHandle">A unique identifier for the camera image to convert.</param>
/// <param name="conversionParams">The parameters to use during the conversion.</param>
/// <param name="destinationBuffer">A buffer to write the converted image to.</param>
/// <param name="bufferLength">The number of bytes available in the buffer.</param>
/// <returns>
/// <c>true</c> if the image was converted and stored in <paramref name="destinationBuffer"/>.
/// </returns>
/// <exception cref="System.NotSupportedException">Thrown if the implementation does not support camera
/// image.</exception>
public virtual bool TryConvert(
int nativeHandle,
XRCameraImageConversionParams conversionParams,
IntPtr destinationBuffer,
int bufferLength)
{
throw new NotSupportedException("camera image conversion is not supported by this implementation");
}
/// <summary>
/// Start the image conversion using this class to interact with the asynchronous conversion and results.
/// </summary>
/// <param name="cameraSubsystem">The camera subsystem performing the image conversion.</param>
/// <param name="nativeHandle">The native handle for the camera image.</param>
/// <param name="conversionParams">The parameters for image conversion.</param>
internal XRAsyncCameraImageConversion(XRCameraSubsystem cameraSubsystem, int nativeHandle,
XRCameraImageConversionParams conversionParams)
{
m_CameraSubsystem = cameraSubsystem;
m_RequestId = m_CameraSubsystem.ConvertAsync(nativeHandle, conversionParams);
this.conversionParams = conversionParams;
#if ENABLE_UNITY_COLLECTIONS_CHECKS
m_SafetyHandle = AtomicSafetyHandle.Create();
#endif
}
/// <summary>
/// <para>Convert the <c>XRCameraImage</c> to one of the supported formats using the specified
/// <paramref name="conversionParams"/>. The conversion is performed asynchronously, and
/// <paramref name="onComplete"/> is invoked when the conversion is complete, whether successful or not.</para>
/// <para>The <c>NativeArray</c> provided in the <paramref name="onComplete"/> delegate is only valid during
/// the invocation and is disposed immediately upon return.</para>
/// </summary>
/// <param name="conversionParams">The parameters to use for the conversion.</param>
/// <param name="onComplete">A delegate to invoke when the conversion operation completes. The delegate is
/// always invoked.</param>
/// <seealso cref="FormatSupported"/>
public void ConvertAsync(
XRCameraImageConversionParams conversionParams,
Action <AsyncCameraImageConversionStatus, XRCameraImageConversionParams, NativeArray <byte> > onComplete)
{
ValidateNativeHandleAndThrow();
ValidateConversionParamsAndThrow(conversionParams);
var handle = GCHandle.Alloc(onComplete);
var context = GCHandle.ToIntPtr(handle);
m_CameraSubsystem.ConvertAsync(m_NativeHandle, conversionParams, s_OnAsyncConversionComplete, context);
}
/// <summary>
/// Convert the <c>XRCameraImage</c> to one of the supported formats using the specified
/// <paramref name="conversionParams"/>.
/// </summary>
/// <param name="conversionParams">The parameters for the image conversion.</param>
/// <param name="destinationBuffer">A pointer to memory to which to write the converted image.</param>
/// <param name="bufferLength">The number of bytes pointed to by <paramref name="destinationBuffer"/>. Must be
/// greater than or equal to the value returned by
/// <see cref="GetConvertedDataSize(XRCameraImageConversionParams)"/>.</param>
/// <exception cref="System.ArgumentException">Thrown if the <paramref name="bufferLength"/> is smaller than
/// the data size required by the conversion.</exception>
/// <exception cref="System.InvalidOperationException">Thrown if the conversion failed.</exception>
/// <seealso cref="FormatSupported"/>
public void Convert(XRCameraImageConversionParams conversionParams, IntPtr destinationBuffer, int bufferLength)
{
ValidateNativeHandleAndThrow();
ValidateConversionParamsAndThrow(conversionParams);
int requiredDataSize = GetConvertedDataSize(conversionParams);
if (bufferLength < requiredDataSize)
{
throw new ArgumentException(string.Format(
"Conversion requires {0} bytes but only provided {1} bytes.", requiredDataSize, bufferLength),
"bufferLength");
}
if (!m_CameraSubsystem.TryConvert(m_NativeHandle, conversionParams, destinationBuffer, bufferLength))
{
throw new InvalidOperationException("Conversion failed.");
}
}
/// <summary>
/// Ensure the conversion parameters are valid.
/// </summary>
/// <param name="conversionParams">The conversion parameters to validate.</param>
/// <exception cref="System.ArgumentOutOfRangeException">Thrown if the input image rect exceeds the actual
/// image dimensions or if the output dimensions exceed the input dimensions.</exception>
/// <exception cref="System.ArgumentException">Thrown if the texture format is not suppported</exception>
/// <seealso cref="FormatSupported"/>
void ValidateConversionParamsAndThrow(XRCameraImageConversionParams conversionParams)
{
if ((conversionParams.inputRect.x + conversionParams.inputRect.width > width) ||
(conversionParams.inputRect.y + conversionParams.inputRect.height > height))
{
throw new ArgumentOutOfRangeException(
"conversionParams.inputRect",
"Input rect must be completely within the original image.");
}
if ((conversionParams.outputDimensions.x > conversionParams.inputRect.width) ||
(conversionParams.outputDimensions.y > conversionParams.inputRect.height))
{
throw new ArgumentOutOfRangeException(string.Format(
"Output dimensions must be less than or equal to the inputRect's dimensions: ({0}x{1} > {2}x{3}).",
conversionParams.outputDimensions.x, conversionParams.outputDimensions.y,
conversionParams.inputRect.width, conversionParams.inputRect.height));
}
if (!FormatSupported(conversionParams.outputFormat))
{
throw new ArgumentException("TextureFormat not supported.", "conversionParams.format");
}
}
/// <summary>
/// Create an asynchronous request to convert a camera image, similar to <see cref="TryConvert"/> except the
/// conversion should happen on a thread other than the calling (main) thread.
/// </summary>
/// <param name="nativeHandle">A unique identifier for the camera image to convert.</param>
/// <param name="conversionParams">The parameters to use during the conversion.</param>
/// <returns>A unique identifier for this request.</returns>
/// <exception cref="System.NotSupportedException">Thrown if the implementation does not support camera image.
/// </exception>
internal int ConvertAsync(
int nativeHandle,
XRCameraImageConversionParams conversionParams)
{
return(m_Provider.ConvertAsync(nativeHandle, conversionParams));
}
/// <summary>
/// Method to be implemented by the provider to create an asynchronous request to convert a camera image,
/// similar to <see cref="TryConvert"/> except the conversion should happen on a thread other than the
/// calling (main) thread.
/// </summary>
/// <param name="nativeHandle">A unique identifier for the camera image to convert.</param>
/// <param name="conversionParams">The parameters to use during the conversion.</param>
/// <returns>A unique identifier for this request.</returns>
/// <exception cref="System.NotSupportedException">Thrown if the implementation does not support camera
/// image.</exception>
public virtual int ConvertAsync(
int nativeHandle,
XRCameraImageConversionParams conversionParams)
{
throw new NotSupportedException("camera image conversion is not supported by this implementation");
}
/// <summary>
/// Get the number of bytes required to store a converted image with the given parameters.
/// </summary>
/// <param name="conversionParams">The desired conversion parameters.</param>
/// <returns>The number of bytes required to store the converted image.</returns>
/// <exception cref="System.ArgumentException">Thrown if the desired format is not supported.</exception>
/// <exception cref="System.ArgumentOutOfRangeException">Thrown if the desired dimensions exceed the native
/// image dimensions.</exception>
/// <exception cref="System.InvalidOperationException">Thrown if the image is invalid.</exception>
/// <seealso cref="FormatSupported"/>
public int GetConvertedDataSize(XRCameraImageConversionParams conversionParams)
{
return(GetConvertedDataSize(
conversionParams.outputDimensions,
conversionParams.outputFormat));
}
