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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_FORMATS_WEBM_WEBM_WEBVTT_PARSER_H_
#define MEDIA_FORMATS_WEBM_WEBM_WEBVTT_PARSER_H_
#include <string>
#include "base/basictypes.h"
#include "media/base/media_export.h"
namespace media {
class MEDIA_EXPORT WebMWebVTTParser {
public:
// Utility function to parse the WebVTT cue from a byte stream.
static void Parse(const uint8* payload, int payload_size,
std::string* id,
std::string* settings,
std::string* content);
private:
// The payload is the embedded WebVTT cue, stored in a WebM block.
// The parser treats this as a UTF-8 byte stream.
WebMWebVTTParser(const uint8* payload, int payload_size);
// Parse the cue identifier, settings, and content from the stream.
void Parse(std::string* id, std::string* settings, std::string* content);
// Remove a byte from the stream, advancing the stream pointer.
// Returns true if a character was returned; false means "end of stream".
bool GetByte(uint8* byte);
// Backup the stream pointer.
void UngetByte();
// Parse a line of text from the stream.
void ParseLine(std::string* line);
// Represents the portion of the stream that has not been consumed yet.
const uint8* ptr_;
const uint8* const ptr_end_;
DISALLOW_COPY_AND_ASSIGN(WebMWebVTTParser);
};
} // namespace media
#endif // MEDIA_FORMATS_WEBM_WEBM_WEBVTT_PARSER_H_
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