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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include <vector>
#include "base/callback_forward.h"
#include "base/macros.h"
#include "media/gpu/image_processor.h"
#include "media/gpu/media_gpu_export.h"
namespace media {
class MEDIA_GPU_EXPORT ImageProcessorFactory {
// Factory method to create ImageProcessor.
// Given input and output PortConfig, it tries to find out the most suitable
// ImageProcessor to be used for the current platform.
// For |preferred_output_modes|, it tries instantiate an ImageProcessor class
// with an output mode in sequence. With ImageProcessor subclass and output
// mode selected, the subclass' factory method will pick the first supported
// input and output storage type from input and output PortConfig,
// respectively. It has an assumption that the selection of output mode is
// independent from the selection of output storage type.
// TODO( Remove |preferred_output_modes| once ImageProcessor
// only accepts IMPORT output mode.
// Args:
// input_config: input PortConfig.
// output_config: output PortConfig.
// preferred_output_modes: list of preferred output modes.
// num_buffers: number of input and output buffers.
// error_cb: Callback when error occurs.
// Returns:
// Most suitable ImageProcessor instance. nullptr if no ImageProcessor
// is available for given parameters on current platform.
static std::unique_ptr<ImageProcessor> Create(
const ImageProcessor::PortConfig& input_config,
const ImageProcessor::PortConfig& output_config,
const std::vector<ImageProcessor::OutputMode>& preferred_output_modes,
size_t num_buffers,
ImageProcessor::ErrorCB error_cb);
} // namespace media