// Copyright 2019 Fuzhou Rockchip Electronics Co., Ltd. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef EASYMEDIA_FILTER_H_
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#define EASYMEDIA_FILTER_H_
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#include <stdarg.h>
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#include <memory>
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#include "control.h"
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#include "media_reflector.h"
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namespace easymedia
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{
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DECLARE_FACTORY(Filter)
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// usage: REFLECTOR(Filter)::Create<T>(filtername, param)
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// T must be the final class type exposed to user
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DECLARE_REFLECTOR(Filter)
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#define DEFINE_FILTER_FACTORY(REAL_PRODUCT, FINAL_EXPOSE_PRODUCT) \
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DEFINE_MEDIA_CHILD_FACTORY(REAL_PRODUCT, REAL_PRODUCT::GetFilterName(), FINAL_EXPOSE_PRODUCT, Filter) \
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DEFINE_MEDIA_CHILD_FACTORY_EXTRA(REAL_PRODUCT) \
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DEFINE_MEDIA_NEW_PRODUCT_BY(REAL_PRODUCT, Filter, GetError() < 0)
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#define DEFINE_COMMON_FILTER_FACTORY(REAL_PRODUCT) DEFINE_FILTER_FACTORY(REAL_PRODUCT, Filter)
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class MediaBuffer;
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class _API Filter
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{
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public:
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virtual ~Filter() = 0;
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static const char* GetFilterName()
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{
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return nullptr;
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}
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// sync call, input and output must be valid
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virtual int Process(std::shared_ptr<MediaBuffer> input, std::shared_ptr<MediaBuffer>& output);
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// some filter may output many buffers with one input.
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// sync or async safe call, depends on specific filter.
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virtual int SendInput(std::shared_ptr<MediaBuffer> input);
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virtual std::shared_ptr<MediaBuffer> FetchOutput();
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virtual int IoCtrl(unsigned long int request _UNUSED, ...)
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{
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return -1;
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}
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DEFINE_ERR_GETSET()
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DECLARE_PART_FINAL_EXPOSE_PRODUCT(Filter)
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};
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} // namespace easymedia
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#endif // #ifndef EASYMEDIA_FILTER_H_
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