85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
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// Copyright 2015 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 MEDIA_FORMATS_WEBVTT_WEBVTT_MEDIA_PARSER_H_
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#define MEDIA_FORMATS_WEBVTT_WEBVTT_MEDIA_PARSER_H_
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#include "packager/media/base/media_parser.h"
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#include <stdint.h>
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#include <string>
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#include <vector>
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namespace edash_packager {
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namespace media {
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// If comment is not empty, then this is metadata and other fields must
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// be empty.
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// Data that can be multiline are vector of strings.
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struct Cue {
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Cue();
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~Cue();
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std::string identifier;
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uint64_t start_time;
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uint64_t duration;
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std::string settings;
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std::vector<std::string> payload;
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std::vector<std::string> comment;
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};
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// WebVTT parser.
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// The input may not be encrypted so decryption_key_source is ignored.
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class WebVttMediaParser : public MediaParser {
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public:
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WebVttMediaParser();
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~WebVttMediaParser() override;
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/// @name MediaParser implementation overrides.
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/// @{
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void Init(const InitCB& init_cb,
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const NewSampleCB& new_sample_cb,
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KeySource* decryption_key_source) override;
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void Flush() override;
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bool Parse(const uint8_t* buf, int size) override;
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/// @}
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private:
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enum WebVttReadingState {
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kHeader,
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kMetadata,
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kCueIdentifierOrTimingOrComment,
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kCueTiming,
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kCuePayload,
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kComment,
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kParseError,
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};
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InitCB init_cb_;
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NewSampleCB new_sample_cb_;
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// All the unprocessed data passed to this parser.
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std::string data_;
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// The WEBVTT text + metadata header (global settings) for this webvtt.
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// One element per line.
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std::vector<std::string> header_;
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// This is set to what the parser is expecting. For example, if the parse is
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// expecting a kCueTiming, then the next line that it parses should be a
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// WebVTT timing line or an empty line.
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WebVttReadingState state_;
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Cue current_cue_;
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DISALLOW_COPY_AND_ASSIGN(WebVttMediaParser);
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};
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} // namespace media
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} // namespace edash_packager
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#endif // MEDIA_FORMATS_WEBVTT_WEBVTT_MEDIA_PARSER_H_
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