85 lines
2.3 KiB
C++
85 lines
2.3 KiB
C++
// Copyright 2015 Google Inc. All rights reserved.
|
|
//
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file or at
|
|
// https://developers.google.com/open-source/licenses/bsd
|
|
|
|
#ifndef PACKAGER_MEDIA_FORMATS_WEBVTT_WEBVTT_MEDIA_PARSER_H_
|
|
#define PACKAGER_MEDIA_FORMATS_WEBVTT_WEBVTT_MEDIA_PARSER_H_
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <memory>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "packager/base/compiler_specific.h"
|
|
#include "packager/media/base/media_parser.h"
|
|
#include "packager/media/formats/webvtt/cue.h"
|
|
#include "packager/media/formats/webvtt/webvtt_sample_converter.h"
|
|
|
|
namespace shaka {
|
|
namespace media {
|
|
|
|
// WebVTT parser.
|
|
// The input may not be encrypted so decryption_key_source is ignored.
|
|
class WebVttMediaParser : public MediaParser {
|
|
public:
|
|
WebVttMediaParser();
|
|
~WebVttMediaParser() override;
|
|
|
|
/// @name MediaParser implementation overrides.
|
|
/// @{
|
|
void Init(const InitCB& init_cb,
|
|
const NewSampleCB& new_sample_cb,
|
|
KeySource* decryption_key_source) override;
|
|
bool Flush() override WARN_UNUSED_RESULT;
|
|
bool Parse(const uint8_t* buf, int size) override WARN_UNUSED_RESULT;
|
|
/// @}
|
|
|
|
void InjectWebVttSampleConvertForTesting(
|
|
std::unique_ptr<WebVttSampleConverter> converter);
|
|
|
|
private:
|
|
enum WebVttReadingState {
|
|
kHeader,
|
|
kMetadata,
|
|
kCueIdentifierOrTimingOrComment,
|
|
kCueTiming,
|
|
kCuePayload,
|
|
kComment,
|
|
kParseError,
|
|
};
|
|
|
|
// Sends current cue to sample converter, and dispatches any ready samples to
|
|
// the callback.
|
|
// current_cue_ is always cleared.
|
|
bool ProcessCurrentCue(bool flush);
|
|
|
|
InitCB init_cb_;
|
|
NewSampleCB new_sample_cb_;
|
|
|
|
// All the unprocessed data passed to this parser.
|
|
std::string data_;
|
|
|
|
// The WEBVTT text + metadata header (global settings) for this webvtt.
|
|
// One element per line.
|
|
std::vector<std::string> header_;
|
|
|
|
// This is set to what the parser is expecting. For example, if the parse is
|
|
// expecting a kCueTiming, then the next line that it parses should be a
|
|
// WebVTT timing line or an empty line.
|
|
WebVttReadingState state_;
|
|
|
|
Cue current_cue_;
|
|
|
|
std::unique_ptr<WebVttSampleConverter> sample_converter_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(WebVttMediaParser);
|
|
};
|
|
|
|
} // namespace media
|
|
} // namespace shaka
|
|
|
|
#endif // PACKAGER_MEDIA_FORMATS_WEBVTT_WEBVTT_MEDIA_PARSER_H_
|