chromium/third_party/tflite_support/src/tensorflow_lite_support/cc/task/processor/image_preprocessor.cc

/* Copyright 2021 The TensorFlow Authors. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==============================================================================*/

#include "tensorflow_lite_support/cc/task/processor/image_preprocessor.h"

#include "tensorflow_lite_support/cc/port/status_macros.h"
#include "tensorflow_lite_support/cc/task/core/task_utils.h"
#include "tensorflow_lite_support/cc/task/vision/proto/bounding_box_proto_inc.h"
#include "tensorflow_lite_support/cc/task/vision/utils/frame_buffer_utils.h"
#include "tensorflow_lite_support/cc/task/vision/utils/image_tensor_specs.h"

namespace tflite {
namespace task {
namespace processor {

namespace {
// Number of bytes required for 8-bit per pixel RGB color space.
static constexpr int kRgbPixelBytes = …;

BoundingBox;
FrameBuffer;
}  // namespace

/* static */
tflite::support::StatusOr<std::unique_ptr<ImagePreprocessor>>
ImagePreprocessor::Create(
    core::TfLiteEngine* engine, const std::initializer_list<int> input_indices,
    const vision::FrameBufferUtils::ProcessEngine& process_engine) { … }

// Returns false if image preprocessing could be skipped, true otherwise.
bool ImagePreprocessor::IsImagePreprocessingNeeded(
    const FrameBuffer& frame_buffer, const BoundingBox& roi) { … }

absl::Status ImagePreprocessor::Init(
    const vision::FrameBufferUtils::ProcessEngine& process_engine) { … }

absl::Status ImagePreprocessor::Preprocess(const FrameBuffer& frame_buffer) { … }

absl::Status ImagePreprocessor::Preprocess(const FrameBuffer& frame_buffer,
                                           const BoundingBox& roi) { … }

}  // namespace processor
}  // namespace task
}  // namespace tflite