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MediaPipe Team Project import generated by Copybara. 2946872 Aug 17, 2019
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// Copyright 2019 The MediaPipe Authors.
//
// 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.
#ifndef MEDIAPIPE_GPU_GPU_BUFFER_H_
#define MEDIAPIPE_GPU_GPU_BUFFER_H_
#include <utility>
#include "mediapipe/gpu/gl_base.h"
#include "mediapipe/gpu/gpu_buffer_format.h"
#if defined(__APPLE__)
#include <CoreVideo/CoreVideo.h>
#include "mediapipe/objc/CFHolder.h"
#if !TARGET_OS_OSX
#define MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER 1
#endif // TARGET_OS_OSX
#endif // defined(__APPLE__)
#if !MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
#include "mediapipe/gpu/gl_texture_buffer.h"
#endif // MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
namespace mediapipe {
// This class wraps a platform-specific buffer of GPU data.
// An instance of GpuBuffer acts as an opaque reference to the underlying
// data object.
class GpuBuffer {
public:
// Default constructor creates invalid object.
GpuBuffer() = default;
// Copy and move constructors and assignment operators are supported.
GpuBuffer(const GpuBuffer& other) = default;
GpuBuffer(GpuBuffer&& other) = default;
GpuBuffer& operator=(const GpuBuffer& other) = default;
GpuBuffer& operator=(GpuBuffer&& other) = default;
// Constructors from platform-specific representations, and accessors for the
// underlying platform-specific representation. Use with caution, since they
// are not portable. Applications and calculators should normally obtain
// GpuBuffers in a portable way from the framework, e.g. using
// GpuBufferMultiPool.
#if MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
explicit GpuBuffer(CFHolder<CVPixelBufferRef> pixel_buffer)
: pixel_buffer_(std::move(pixel_buffer)) {}
explicit GpuBuffer(CVPixelBufferRef pixel_buffer)
: pixel_buffer_(pixel_buffer) {}
CVPixelBufferRef GetCVPixelBufferRef() const { return *pixel_buffer_; }
#else
explicit GpuBuffer(GlTextureBufferSharedPtr texture_buffer)
: texture_buffer_(std::move(texture_buffer)) {}
const GlTextureBufferSharedPtr& GetGlTextureBufferSharedPtr() const {
return texture_buffer_;
}
#endif // MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
int width() const;
int height() const;
GpuBufferFormat format() const;
// Converts to true iff valid.
explicit operator bool() const { return operator!=(nullptr); }
bool operator==(const GpuBuffer& other) const;
bool operator!=(const GpuBuffer& other) const { return !operator==(other); }
// Allow comparison with nullptr.
bool operator==(std::nullptr_t other) const;
bool operator!=(std::nullptr_t other) const { return !operator==(other); }
// Allow assignment from nullptr.
GpuBuffer& operator=(std::nullptr_t other);
private:
#if MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
CFHolder<CVPixelBufferRef> pixel_buffer_;
#else
GlTextureBufferSharedPtr texture_buffer_;
#endif // MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
};
#if MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
inline int GpuBuffer::width() const {
return static_cast<int>(CVPixelBufferGetWidth(*pixel_buffer_));
}
inline int GpuBuffer::height() const {
return static_cast<int>(CVPixelBufferGetHeight(*pixel_buffer_));
}
inline GpuBufferFormat GpuBuffer::format() const {
return GpuBufferFormatForCVPixelFormat(
CVPixelBufferGetPixelFormatType(*pixel_buffer_));
}
inline bool GpuBuffer::operator==(std::nullptr_t other) const {
return pixel_buffer_ == other;
}
inline bool GpuBuffer::operator==(const GpuBuffer& other) const {
return pixel_buffer_ == other.pixel_buffer_;
}
inline GpuBuffer& GpuBuffer::operator=(std::nullptr_t other) {
pixel_buffer_.reset(other);
return *this;
}
#else
inline int GpuBuffer::width() const { return texture_buffer_->width(); }
inline int GpuBuffer::height() const { return texture_buffer_->height(); }
inline GpuBufferFormat GpuBuffer::format() const {
return texture_buffer_->format();
}
inline bool GpuBuffer::operator==(std::nullptr_t other) const {
return texture_buffer_ == other;
}
inline bool GpuBuffer::operator==(const GpuBuffer& other) const {
return texture_buffer_ == other.texture_buffer_;
}
inline GpuBuffer& GpuBuffer::operator=(std::nullptr_t other) {
texture_buffer_ = other;
return *this;
}
#endif // MEDIAPIPE_GPU_BUFFER_USE_CV_PIXEL_BUFFER
} // namespace mediapipe
#endif // MEDIAPIPE_GPU_GPU_BUFFER_H_
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