96 lines
3.0 KiB
C++
96 lines
3.0 KiB
C++
// Copyright 2023 The MediaPipe Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "mediapipe/util/frame_buffer/gray_buffer.h"
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#include <utility>
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#include "mediapipe/util/frame_buffer/buffer_common.h"
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#include "mediapipe/util/frame_buffer/halide/gray_flip_halide.h"
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#include "mediapipe/util/frame_buffer/halide/gray_resize_halide.h"
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#include "mediapipe/util/frame_buffer/halide/gray_rotate_halide.h"
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#include "mediapipe/util/frame_buffer/yuv_buffer.h"
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namespace mediapipe {
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namespace frame_buffer {
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GrayBuffer::GrayBuffer(uint8_t* buffer, int width, int height)
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: owned_buffer_(nullptr) {
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Initialize(buffer, width, height);
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}
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GrayBuffer::GrayBuffer(int width, int height)
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: owned_buffer_(new uint8_t[ByteSize(width, height)]) {
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Initialize(owned_buffer_.get(), width, height);
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}
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GrayBuffer::GrayBuffer(const GrayBuffer& other) : buffer_(other.buffer_) {}
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GrayBuffer::GrayBuffer(GrayBuffer&& other) { *this = std::move(other); }
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GrayBuffer& GrayBuffer::operator=(const GrayBuffer& other) {
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if (this != &other) {
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buffer_ = other.buffer_;
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}
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return *this;
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}
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GrayBuffer& GrayBuffer::operator=(GrayBuffer&& other) {
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if (this != &other) {
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owned_buffer_ = std::move(other.owned_buffer_);
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buffer_ = other.buffer_;
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}
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return *this;
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}
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GrayBuffer::~GrayBuffer() {}
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void GrayBuffer::Initialize(uint8_t* data, int width, int height) {
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buffer_ = Halide::Runtime::Buffer<uint8_t>(data, width, height);
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}
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bool GrayBuffer::Crop(int x0, int y0, int x1, int y1) {
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// Twiddle the buffer start and extents to crop images.
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return common::crop_buffer(x0, y0, x1, y1, buffer());
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}
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bool GrayBuffer::Resize(GrayBuffer* output) {
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const int result = gray_resize_halide(
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buffer(), static_cast<float>(width()) / output->width(),
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static_cast<float>(height()) / output->height(), output->buffer());
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return result == 0;
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}
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bool GrayBuffer::Rotate(int angle, GrayBuffer* output) {
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const int result = gray_rotate_halide(buffer(), angle, output->buffer());
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return result == 0;
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}
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bool GrayBuffer::FlipHorizontally(GrayBuffer* output) {
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const int result = gray_flip_halide(buffer(),
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false, // horizontal
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output->buffer());
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return result == 0;
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}
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bool GrayBuffer::FlipVertically(GrayBuffer* output) {
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const int result = gray_flip_halide(buffer(),
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true, // vertical
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output->buffer());
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return result == 0;
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}
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} // namespace frame_buffer
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} // namespace mediapipe
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