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55 lines
1.4 KiB
55 lines
1.4 KiB
// Copyright (C) 2020 The Android Open Source Project
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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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// A parser for VpxFrame
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// the specified data.
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#pragma once
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#include <cstdint>
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#include <string>
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namespace android {
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namespace emulation {
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class VpxFrameParser {
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public:
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VpxFrameParser(int vpxtype, const uint8_t* data, size_t size);
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~VpxFrameParser() = default;
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public:
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bool isKeyFrame() const { return m_is_key_frame; }
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private:
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int type = 0; // 8: vp8, 9: vp9
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const uint8_t* bit_buffer = nullptr;
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const uint8_t* bit_buffer_end = nullptr;
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size_t bit_offset = 0;
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bool m_is_key_frame = false;
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private:
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static constexpr int KEY_FRAME = 0;
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static constexpr int INTER_FRAME = 1;
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int read_bit();
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int read_literal(int bits);
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void parse_vp9_uncompressed_header();
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void parse_vp8_uncompressed_header();
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};
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} // namespace emulation
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} // namespace android
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