154 lines
4.7 KiB
C++
154 lines
4.7 KiB
C++
// Copyright 2019 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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#ifndef MEDIAPIPE_GPU_GPU_BUFFER_H_
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#define MEDIAPIPE_GPU_GPU_BUFFER_H_
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#include <utility>
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#include "mediapipe/gpu/gl_base.h"
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#include "mediapipe/gpu/gpu_buffer_format.h"
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#if defined(__APPLE__)
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#include <CoreVideo/CoreVideo.h>
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#include "mediapipe/objc/CFHolder.h"
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#if !TARGET_OS_OSX
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#define MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER 1
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#endif // TARGET_OS_OSX
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#endif // defined(__APPLE__)
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#if !MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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#include "mediapipe/gpu/gl_texture_buffer.h"
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#endif // MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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namespace mediapipe {
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// This class wraps a platform-specific buffer of GPU data.
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// An instance of GpuBuffer acts as an opaque reference to the underlying
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// data object.
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class GpuBuffer {
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public:
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// Default constructor creates invalid object.
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GpuBuffer() = default;
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// Copy and move constructors and assignment operators are supported.
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GpuBuffer(const GpuBuffer& other) = default;
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GpuBuffer(GpuBuffer&& other) = default;
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GpuBuffer& operator=(const GpuBuffer& other) = default;
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GpuBuffer& operator=(GpuBuffer&& other) = default;
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// Constructors from platform-specific representations, and accessors for the
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// underlying platform-specific representation. Use with caution, since they
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// are not portable. Applications and calculators should normally obtain
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// GpuBuffers in a portable way from the framework, e.g. using
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// GpuBufferMultiPool.
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#if MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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explicit GpuBuffer(CFHolder<CVPixelBufferRef> pixel_buffer)
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: pixel_buffer_(std::move(pixel_buffer)) {}
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explicit GpuBuffer(CVPixelBufferRef pixel_buffer)
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: pixel_buffer_(pixel_buffer) {}
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CVPixelBufferRef GetCVPixelBufferRef() const { return *pixel_buffer_; }
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#else
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explicit GpuBuffer(GlTextureBufferSharedPtr texture_buffer)
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: texture_buffer_(std::move(texture_buffer)) {}
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const GlTextureBufferSharedPtr& GetGlTextureBufferSharedPtr() const {
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return texture_buffer_;
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}
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#endif // MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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int width() const;
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int height() const;
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GpuBufferFormat format() const;
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// Converts to true iff valid.
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explicit operator bool() const { return operator!=(nullptr); }
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bool operator==(const GpuBuffer& other) const;
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bool operator!=(const GpuBuffer& other) const { return !operator==(other); }
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// Allow comparison with nullptr.
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bool operator==(std::nullptr_t other) const;
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bool operator!=(std::nullptr_t other) const { return !operator==(other); }
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// Allow assignment from nullptr.
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GpuBuffer& operator=(std::nullptr_t other);
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private:
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#if MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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CFHolder<CVPixelBufferRef> pixel_buffer_;
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#else
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GlTextureBufferSharedPtr texture_buffer_;
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#endif // MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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};
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#if MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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inline int GpuBuffer::width() const {
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return static_cast<int>(CVPixelBufferGetWidth(*pixel_buffer_));
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}
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inline int GpuBuffer::height() const {
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return static_cast<int>(CVPixelBufferGetHeight(*pixel_buffer_));
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}
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inline GpuBufferFormat GpuBuffer::format() const {
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return GpuBufferFormatForCVPixelFormat(
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CVPixelBufferGetPixelFormatType(*pixel_buffer_));
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}
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inline bool GpuBuffer::operator==(std::nullptr_t other) const {
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return pixel_buffer_ == other;
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}
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inline bool GpuBuffer::operator==(const GpuBuffer& other) const {
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return pixel_buffer_ == other.pixel_buffer_;
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}
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inline GpuBuffer& GpuBuffer::operator=(std::nullptr_t other) {
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pixel_buffer_.reset(other);
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return *this;
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}
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#else
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inline int GpuBuffer::width() const { return texture_buffer_->width(); }
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inline int GpuBuffer::height() const { return texture_buffer_->height(); }
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inline GpuBufferFormat GpuBuffer::format() const {
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return texture_buffer_->format();
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}
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inline bool GpuBuffer::operator==(std::nullptr_t other) const {
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return texture_buffer_ == other;
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}
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inline bool GpuBuffer::operator==(const GpuBuffer& other) const {
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return texture_buffer_ == other.texture_buffer_;
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}
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inline GpuBuffer& GpuBuffer::operator=(std::nullptr_t other) {
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texture_buffer_ = other;
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return *this;
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}
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#endif // MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
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} // namespace mediapipe
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#endif // MEDIAPIPE_GPU_GPU_BUFFER_H_
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