Add V2 versions of output window size computation functions for convolution.

These V2 versions take arbitrary dilation rates.
In preparation for the support of native cudnn dilated convolution.

PiperOrigin-RevId: 171048878

tensorflow/core/framework/common_shape_fns.cc

@@ -17,24 +17,31 @@ limitations under the License.
 
 namespace tensorflow {
 
-Status GetWindowedOutputSizeVerbose(int64 input_size, int64 filter_size,
-                                    int64 stride, Padding padding_type,
-                                    int64* output_size, int64* padding_before,
+Status GetWindowedOutputSizeVerboseV2(int64 input_size, int64 filter_size,
+                                      int64 dilation_rate, int64 stride,
+                                      Padding padding_type, int64* output_size,
+                                      int64* padding_before,
                                       int64* padding_after) {
   if (stride <= 0) {
     return errors::InvalidArgument("Stride must be > 0, but got ", stride);
   }
+  if (dilation_rate < 1) {
+    return errors::InvalidArgument("Dilation rate must be >= 1, but got ",
+                                   dilation_rate);
+  }
 
-  // See also the parallel implementation in GetWindowedOutputSizeFromDims.
+  // See also the parallel implementation in GetWindowedOutputSizeFromDimsV2.
+  int64 effective_filter_size = (filter_size - 1) * dilation_rate + 1;
   switch (padding_type) {
     case Padding::VALID:
-      *output_size = (input_size - filter_size + stride) / stride;
+      *output_size = (input_size - effective_filter_size + stride) / stride;
       *padding_before = *padding_after = 0;
       break;
     case Padding::SAME:
       *output_size = (input_size + stride - 1) / stride;
       const int64 padding_needed =
-          std::max(0LL, (*output_size - 1) * stride + filter_size - input_size);
+          std::max(0LL, (*output_size - 1) * stride + effective_filter_size -
+                            input_size);
       // For odd values of total padding, add more padding at the 'right'
       // side of the given dimension.
       *padding_before = padding_needed / 2;
@@ -47,15 +54,35 @@ Status GetWindowedOutputSizeVerbose(int64 input_size, int64 filter_size,
   return Status::OK();
 }
 
+Status GetWindowedOutputSizeVerbose(int64 input_size, int64 filter_size,
+                                    int64 stride, Padding padding_type,
+                                    int64* output_size, int64* padding_before,
+                                    int64* padding_after) {
+  return GetWindowedOutputSizeVerboseV2(input_size, filter_size,
+                                        /*dilation_rate=*/1, stride,
+                                        padding_type, output_size,
+                                        padding_before, padding_after);
+}
+
 Status GetWindowedOutputSize(int64 input_size, int64 filter_size, int64 stride,
                              Padding padding_type, int64* output_size,
-                             int64* padding) {
+                             int64* padding_size) {
   int64 padding_after_unused;
   return GetWindowedOutputSizeVerbose(input_size, filter_size, stride,
-                                      padding_type, output_size, padding,
+                                      padding_type, output_size, padding_size,
                                       &padding_after_unused);
 }
 
+Status GetWindowedOutputSizeV2(int64 input_size, int64 filter_size,
+                               int64 dilation_rate, int64 stride,
+                               Padding padding_type, int64* output_size,
+                               int64* padding_size) {
+  int64 padding_after_unused;
+  return GetWindowedOutputSizeVerboseV2(input_size, filter_size, dilation_rate,
+                                        stride, padding_type, output_size,
+                                        padding_size, &padding_after_unused);
+}
+
 Status Get3dOutputSize(const std::array<int64, 3>& input,
                        const std::array<int64, 3>& window,
                        const std::array<int64, 3>& strides,
@@ -69,32 +96,75 @@ Status Get3dOutputSize(const std::array<int64, 3>& input,
   return Status::OK();
 }
 
+Status Get3dOutputSizeV2(const std::array<int64, 3>& input,
+                         const std::array<int64, 3>& window,
+                         const std::array<int64, 3>& dilations,
+                         const std::array<int64, 3>& strides,
+                         Padding padding_type, std::array<int64, 3>* output_ptr,
+                         std::array<int64, 3>* padding_ptr) {
+  for (size_t i = 0; i < input.size(); ++i) {
+    TF_RETURN_IF_ERROR(GetWindowedOutputSizeV2(
+        input[i], window[i], dilations[i], strides[i], padding_type,
+        &(*output_ptr)[i], &(*padding_ptr)[i]));
+  }
+  return Status::OK();
+}
+
 namespace shape_inference {
 
+// The V2 version computes windowed output size with arbitrary dilation_rate,
+// while the original version only handles the cases where dilation_rates equal
+// to 1.
+Status GetWindowedOutputSizeFromDimsV2(
+    shape_inference::InferenceContext* c,
+    shape_inference::DimensionHandle input_size,
+    shape_inference::DimensionOrConstant filter_size, int64 dilation_rate,
+    int64 stride, Padding padding_type,
+    shape_inference::DimensionHandle* output_size) {
+  if (stride <= 0) {
+    return errors::InvalidArgument("Stride must be > 0, but got ", stride);
+  }
+
+  if (dilation_rate < 1) {
+    return errors::InvalidArgument("Dilation rate must be >= 1, but got ",
+                                   dilation_rate);
+  }
+
+  // See also the parallel implementation in GetWindowedOutputSizeVerbose.
+  switch (padding_type) {
+    case Padding::VALID:
+      if (dilation_rate > 1) {
+        DimensionHandle window_size;
+        TF_RETURN_IF_ERROR(
+            c->Subtract(c->MakeDim(filter_size), 1, &window_size));
+        TF_RETURN_IF_ERROR(
+            c->Multiply(window_size, dilation_rate, &window_size));
+        TF_RETURN_IF_ERROR(c->Add(window_size, 1, &window_size));
+        TF_RETURN_IF_ERROR(c->Subtract(input_size, window_size, output_size));
+      } else {
+        TF_RETURN_IF_ERROR(c->Subtract(input_size, filter_size, output_size));
+      }
+      TF_RETURN_IF_ERROR(c->Add(*output_size, stride, output_size));
+      TF_RETURN_IF_ERROR(c->Divide(*output_size, stride,
+                                   /*evenly_divisible=*/false, output_size));
+      break;
+    case Padding::SAME:
+      TF_RETURN_IF_ERROR(c->Add(input_size, stride - 1, output_size));
+      TF_RETURN_IF_ERROR(c->Divide(*output_size, stride,
+                                   /*evenly_divisible=*/false, output_size));
+      break;
+  }
+  return Status::OK();
+}
+
 Status GetWindowedOutputSizeFromDims(
     shape_inference::InferenceContext* c,
     shape_inference::DimensionHandle input_size,
     shape_inference::DimensionOrConstant filter_size, int64 stride,
     Padding padding_type, shape_inference::DimensionHandle* output_size) {
-  if (stride <= 0) {
-    return errors::InvalidArgument("Stride must be > 0, but got ", stride);
-  }
-
-  // See also the parallel implementation in GetWindowedOutputSizeVerbose.
-  switch (padding_type) {
-    case Padding::VALID:
-      TF_RETURN_IF_ERROR(c->Subtract(input_size, filter_size, output_size));
-      TF_RETURN_IF_ERROR(c->Add(*output_size, stride, output_size));
-      TF_RETURN_IF_ERROR(c->Divide(*output_size, stride,
-                                   false /* evenly_divisible */, output_size));
-      break;
-    case Padding::SAME:
-      TF_RETURN_IF_ERROR(c->Add(input_size, stride - 1, output_size));
-      TF_RETURN_IF_ERROR(c->Divide(*output_size, stride,
-                                   false /* evenly_divisible */, output_size));
-      break;
-  }
-  return Status::OK();
+  return GetWindowedOutputSizeFromDimsV2(c, input_size, filter_size,
+                                         /*dilation_rate=*/1, stride,
+                                         padding_type, output_size);
 }
 
 Status UnchangedShape(shape_inference::InferenceContext* c) {

tensorflow/core/framework/common_shape_fns.h

@@ -75,6 +75,32 @@ Status GetWindowedOutputSize(int64 input_size, int64 filter_size, int64 stride,
                              Padding padding_type, int64* output_size,
                              int64* padding_size);
 
+// The V2 version computes the same outputs with arbitrary dilation_rate.
+// The output dimensions are computed as follows:
+// - When adding dilation_rate (D), we compute an effective filter size (K'):
+//     K' = (K - 1) * D + 1
+// - When Padding = SAME: the output size is (H'), where
+//     H' = ceil(float(H) / float(S))
+//   where ceil is the ceiling function. The number of padded cells
+//   is computed as:
+//     Pc = ((H' - 1) * S + K' - H) / 2
+//   When the stride is 1, the expression simplifies to
+//     H' = H, Pc = (K'-1)/2.
+//   This is where SAME comes from - the output has the same size as the input
+//   has.
+//
+// - When Padding = VALID: the output size is computed as
+//     H' = ceil(float(H - K' + 1) / float(S))
+//   and the number of padded cells is always zero.
+//   When the stride is 1, the expression simplifies to
+//     H' = H-K'+1.
+//
+// TODO(b/67112639): Merge V2 versions and the original versions eventually.
+Status GetWindowedOutputSizeV2(int64 input_size, int64 filter_size,
+                               int64 dilation_rate, int64 stride,
+                               Padding padding_type, int64* output_size,
+                               int64* padding_size);
+
 // Returns the same output dimensions as in GetWindowedOutputSize, but returns
 // verbose padding dimensions (before/after). Any excess padding
 // (caused by an odd padding size value) is added to the 'padding_after'
@@ -84,6 +110,14 @@ Status GetWindowedOutputSizeVerbose(int64 input_size, int64 filter_size,
                                     int64* output_size, int64* padding_before,
                                     int64* padding_after);
 
+// The V2 version computes the same outputs with arbitrary dilation_rate. For
+// detailed equations, refer to the comments for GetWindowedOutputSizeV2().
+Status GetWindowedOutputSizeVerboseV2(int64 input_size, int64 filter_size,
+                                      int64 dilation_rate, int64 stride,
+                                      Padding padding_type, int64* output_size,
+                                      int64* padding_before,
+                                      int64* padding_after);
+
 // Given an input tensor, kernel, stride and padding type, populates the 3D size
 // of the output tensor and padding to be applied to the input tensor at the
 // lower end of every dimension. Use for 3D convolutions, where the input data
@@ -92,8 +126,17 @@ Status GetWindowedOutputSizeVerbose(int64 input_size, int64 filter_size,
 Status Get3dOutputSize(const std::array<int64, 3>& input,
                        const std::array<int64, 3>& window,
                        const std::array<int64, 3>& strides,
-                       Padding padding_type, std::array<int64, 3>* output,
-                       std::array<int64, 3>* padding);
+                       Padding padding_type, std::array<int64, 3>* output_ptr,
+                       std::array<int64, 3>* padding_ptr);
+
+// The V2 version computes the same outputs with arbitrary dilation_rate. For
+// detailed equations, refer to the comments for GetWindowedOutputSizeV2().
+Status Get3dOutputSizeV2(const std::array<int64, 3>& input,
+                         const std::array<int64, 3>& window,
+                         const std::array<int64, 3>& dilations,
+                         const std::array<int64, 3>& strides,
+                         Padding padding_type, std::array<int64, 3>* output_ptr,
+                         std::array<int64, 3>* padding_ptr);
 
 namespace shape_inference {
 
@@ -104,6 +147,15 @@ Status GetWindowedOutputSizeFromDims(InferenceContext* c,
                                      int64 stride, Padding padding_type,
                                      DimensionHandle* output_size);
 
+// The V2 version computes the same outputs with arbitrary dilation_rate. For
+// detailed equations, refer to the comments for GetWindowedOutputSizeV2().
+Status GetWindowedOutputSizeFromDimsV2(InferenceContext* c,
+                                       DimensionHandle input_size,
+                                       DimensionOrConstant filter_size,
+                                       int64 dilation_rate, int64 stride,
+                                       Padding padding_type,
+                                       DimensionHandle* output_size);
+
 // Transfers shape of input(0) to output(0).
 Status UnchangedShape(shape_inference::InferenceContext* c);
 

tensorflow/core/kernels/conv_grad_ops.cc

@@ -23,6 +23,7 @@ limitations under the License.
 #include <algorithm>
 #include <vector>
 
+#include "tensorflow/core/framework/common_shape_fns.h"
 #include "tensorflow/core/framework/numeric_op.h"
 #include "tensorflow/core/framework/op_kernel.h"
 #include "tensorflow/core/framework/register_types.h"
@@ -40,46 +41,64 @@ limitations under the License.
 
 namespace tensorflow {
 
+// The V2 version computes windowed output size with arbitrary dilation_rate,
+// while the original version only handles the cases where dilation_rates equal
+// to 1.
+Status ConvBackpropExtractAndVerifyDimensionV2(
+    StringPiece label, const TensorShape& input_shape,
+    const TensorShape& filter_shape, const TensorShape& output_shape,
+    const gtl::ArraySlice<int32>& dilations, const std::vector<int32>& strides,
+    Padding padding, int spatial_dim, int filter_spatial_dim,
+    ConvBackpropSpatialDimension* dim) {
+  dim->input_size = input_shape.dim_size(spatial_dim);
+  dim->filter_size = filter_shape.dim_size(filter_spatial_dim);
+  dim->output_size = output_shape.dim_size(spatial_dim);
+  dim->stride = strides[spatial_dim];
+  dim->dilation = dilations[spatial_dim];
+  int64 out_size = 0, pad_size = 0;
+  TF_RETURN_IF_ERROR(GetWindowedOutputSizeV2(dim->input_size, dim->filter_size,
+                                             dim->dilation, dim->stride,
+                                             padding, &out_size, &pad_size));
+  if (dim->output_size != out_size) {
+    return errors::InvalidArgument(
+        label, ": Size of out_backprop doesn't match computed: ", "actual = ",
+        dim->output_size, ", computed = ", out_size,
+        "spatial_dim: ", spatial_dim, " input: ", dim->input_size,
+        " filter: ", dim->filter_size, " output: ", dim->output_size,
+        " stride: ", dim->stride, " dilation: ", dim->dilation);
+  }
+
+  int64 effective_filter_size = (dim->filter_size - 1) * dim->dilation + 1;
+  dim->expanded_output_size = (dim->output_size - 1) * dim->stride + 1;
+  const auto padded_out_size = dim->input_size + effective_filter_size - 1;
+  dim->pad_before = effective_filter_size - 1 - pad_size;
+  dim->pad_after =
+      padded_out_size - dim->expanded_output_size - dim->pad_before;
+  VLOG(2) << label << ": expanded_out = " << dim->expanded_output_size
+          << ", effective_filter_size = " << effective_filter_size
+          << ", padded_out = " << padded_out_size
+          << ", pad_before = " << dim->pad_before
+          << ", pad_after = " << dim->pad_after
+          << ", dilation = " << dim->dilation << ", strides = " << dim->stride;
+  return Status::OK();
+}
+
 Status ConvBackpropExtractAndVerifyDimension(
     StringPiece label, const TensorShape& input_shape,
     const TensorShape& filter_shape, const TensorShape& output_shape,
     const std::vector<int32>& strides, Padding padding, int spatial_dim,
     int filter_spatial_dim, ConvBackpropSpatialDimension* dim) {
-  dim->input_size = input_shape.dim_size(spatial_dim);
-  dim->filter_size = filter_shape.dim_size(filter_spatial_dim);
-  dim->output_size = output_shape.dim_size(spatial_dim);
-  dim->stride = strides[spatial_dim];
-  int64 out_size = 0, pad_size = 0;
-  TF_RETURN_IF_ERROR(GetWindowedOutputSize(dim->input_size, dim->filter_size,
-                                           dim->stride, padding, &out_size,
-                                           &pad_size));
-  if (dim->output_size != out_size) {
-    return errors::InvalidArgument(
-        label, ": Size of out_backprop doesn't match computed: ", "actual = ",
-        dim->output_size, ", computed = ", out_size);
-  }
-
-  dim->expanded_output_size = (dim->output_size - 1) * dim->stride + 1;
-  const auto padded_out_size = dim->input_size + dim->filter_size - 1;
-  dim->pad_before = dim->filter_size - 1 - pad_size;
-  dim->pad_after =
-      padded_out_size - dim->expanded_output_size - dim->pad_before;
-  VLOG(2) << label << ": expanded_out = " << dim->expanded_output_size
-          << ", filter = " << dim->filter_size
-          << ", padded_out = " << padded_out_size
-          << ", pad_before = " << dim->pad_before
-          << ", pad_after = " << dim->pad_after
-          << ", strides = " << dim->stride;
-  return Status::OK();
+  static constexpr std::array<int32, 5> one_dilations = {{1, 1, 1, 1, 1}};
+  return ConvBackpropExtractAndVerifyDimensionV2(
+      label, input_shape, filter_shape, output_shape, one_dilations, strides,
+      padding, spatial_dim, filter_spatial_dim, dim);
 }
 
-Status ConvBackpropComputeDimensions(StringPiece label, int num_spatial_dims,
-                                     const TensorShape& input_shape,
-                                     const TensorShape& filter_shape,
-                                     const TensorShape& out_backprop_shape,
-                                     const std::vector<int32>& strides,
-                                     Padding padding, TensorFormat data_format,
-                                     ConvBackpropDimensions* dims) {
+Status ConvBackpropComputeDimensionsV2(
+    StringPiece label, int num_spatial_dims, const TensorShape& input_shape,
+    const TensorShape& filter_shape, const TensorShape& out_backprop_shape,
+    const gtl::ArraySlice<int32>& dilations, const std::vector<int32>& strides,
+    Padding padding, TensorFormat data_format, ConvBackpropDimensions* dims) {
   // The + 2 in the following line is for the batch and feature dimensions.
   const int num_dims = num_spatial_dims + 2;
   if (input_shape.dims() != num_dims) {
@@ -98,7 +117,10 @@ Status ConvBackpropComputeDimensions(StringPiece label, int num_spatial_dims,
   dims->batch_size = input_shape.dim_size(batch_dim);
   if (dims->batch_size != out_backprop_shape.dim_size(batch_dim)) {
     return errors::InvalidArgument(
-        label, ": input and out_backprop must have the same batch size");
+        label, ": input and out_backprop must have the same batch size",
+        "input batch: ", dims->batch_size,
+        "outbackprop batch: ", out_backprop_shape.dim_size(batch_dim),
+        " batch_dim: ", batch_dim);
   }
 
   int feature_dim = GetTensorFeatureDimIndex(num_dims, data_format);
@@ -118,11 +140,24 @@ Status ConvBackpropComputeDimensions(StringPiece label, int num_spatial_dims,
   dims->spatial_dims.resize(num_spatial_dims);
   for (int i = 0; i < num_spatial_dims; ++i) {
     int image_dim = GetTensorSpatialDimIndex(num_dims, data_format, i);
-    TF_RETURN_IF_ERROR(ConvBackpropExtractAndVerifyDimension(
-        label, input_shape, filter_shape, out_backprop_shape, strides, padding,
-        image_dim, i, &dims->spatial_dims[i]));
+    TF_RETURN_IF_ERROR(ConvBackpropExtractAndVerifyDimensionV2(
+        label, input_shape, filter_shape, out_backprop_shape, dilations,
+        strides, padding, image_dim, i, &dims->spatial_dims[i]));
   }
   return Status::OK();
 }
 
+Status ConvBackpropComputeDimensions(StringPiece label, int num_spatial_dims,
+                                     const TensorShape& input_shape,
+                                     const TensorShape& filter_shape,
+                                     const TensorShape& out_backprop_shape,
+                                     const std::vector<int32>& strides,
+                                     Padding padding, TensorFormat data_format,
+                                     ConvBackpropDimensions* dims) {
+  static constexpr std::array<int32, 5> one_dilations = {{1, 1, 1, 1, 1}};
+  return ConvBackpropComputeDimensionsV2(
+      label, num_spatial_dims, input_shape, filter_shape, out_backprop_shape,
+      one_dilations, strides, padding, data_format, dims);
+}
+
 }  // namespace tensorflow

tensorflow/core/kernels/conv_grad_ops.h

@@ -212,6 +212,7 @@ struct ConvBackpropSpatialDimension {
   int64 filter_size;
   int64 output_size;
   int64 stride;
+  int64 dilation;
   int64 expanded_output_size;
 
   // Number of padding elements to be added before/after this dimension of
@@ -242,6 +243,13 @@ Status ConvBackpropComputeDimensions(StringPiece label, int num_spatial_dims,
                                      Padding padding, TensorFormat data_format,
                                      ConvBackpropDimensions* dims);
 
+// The V2 version computes the same outputs with arbitrary dilation rate.
+// TODO(b/67112639): Merge V2 versions and the original versions eventually.
+Status ConvBackpropComputeDimensionsV2(
+    StringPiece label, int num_spatial_dims, const TensorShape& input_shape,
+    const TensorShape& filter_shape, const TensorShape& out_backprop_shape,
+    const std::vector<int32>& dilations, const std::vector<int32>& strides,
+    Padding padding, TensorFormat data_format, ConvBackpropDimensions* dims);
 }  // namespace tensorflow
 
 #endif  // TENSORFLOW_CORE_KERNELS_CONV_GRAD_OPS_H_