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#pragma once
/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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.
*/
#include <cstdint>
#include <cstdlib>
#include <memory>
#include "host/frontend/vnc_server/vnc_utils.h"
namespace cvd {
namespace vnc {
// libjpeg-turbo with jpeg_mem_dest (using memory as a destination) is funky.
// If you give it a buffer that is big enough it will use it.
// If you give it a buffer that is too small, it will allocate a new buffer
// but will NOT free the buffer you gave it.
// This class keeps track of the capacity of the working buffer, and frees the
// old buffer if libjpeg-turbo silently discards it.
class JpegCompressor {
public:
Message Compress(const Message& frame, int jpeg_quality, std::uint16_t x,
std::uint16_t y, std::uint16_t width, std::uint16_t height,
int screen_width);
private:
void UpdateBuffer(std::uint8_t* compression_buffer,
unsigned long compression_buffer_size);
struct Freer {
void operator()(void* p) const { std::free(p); }
};
std::unique_ptr<std::uint8_t, Freer> buffer_;
unsigned long buffer_capacity_{};
};
} // namespace vnc
} // namespace cvd
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