82 lines
1.8 KiB
C++
82 lines
1.8 KiB
C++
// Copyright 2017 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#ifndef PACKAGER_MEDIA_FORMATS_WEBVTT_TEXT_READERS_H_
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#define PACKAGER_MEDIA_FORMATS_WEBVTT_TEXT_READERS_H_
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#include <memory>
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#include <string>
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#include <vector>
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namespace shaka {
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namespace media {
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class CharReader {
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public:
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virtual bool Next(char* out) = 0;
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};
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class PeekingCharReader : public CharReader {
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public:
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explicit PeekingCharReader(std::unique_ptr<CharReader> source);
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bool Next(char* out) override;
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bool Peek(char* out);
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private:
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PeekingCharReader(const PeekingCharReader&) = delete;
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PeekingCharReader operator=(const PeekingCharReader&) = delete;
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std::unique_ptr<CharReader> source_;
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char cached_next_ = 0;
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bool has_cached_next_ = false;
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};
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class LineReader {
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public:
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explicit LineReader(std::unique_ptr<CharReader> source);
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bool Next(std::string* out);
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private:
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LineReader(const LineReader&) = delete;
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LineReader operator=(const LineReader&) = delete;
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PeekingCharReader source_;
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};
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class BlockReader {
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public:
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explicit BlockReader(std::unique_ptr<CharReader> source);
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bool Next(std::vector<std::string>* out);
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private:
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BlockReader(const BlockReader&) = delete;
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BlockReader operator=(const BlockReader&) = delete;
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LineReader source_;
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};
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class StringCharReader : public CharReader {
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public:
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explicit StringCharReader(const std::string& str);
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bool Next(char* out) override;
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private:
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StringCharReader(const StringCharReader&) = delete;
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StringCharReader& operator=(const StringCharReader&) = delete;
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const std::string source_;
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size_t pos_ = 0;
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};
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} // namespace media
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} // namespace shaka
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#endif // MEDIA_FORMATS_WEBVTT_TEXT_READERS_H_
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