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// Copyright (c) 2012 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.
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "base/time.h"
#include "media/webm/webm_content_encodings_client.h"
#include "media/webm/webm_parser.h"
namespace media {
// Parser for WebM Tracks element.
class WebMTracksParser : public WebMParserClient {
explicit WebMTracksParser(int64 timecode_scale);
virtual ~WebMTracksParser();
// Parses a WebM Tracks element in |buf|.
// Returns -1 if the parse fails.
// Returns 0 if more data is needed.
// Returns the number of bytes parsed on success.
int Parse(const uint8* buf, int size);
int64 audio_track_num() const { return audio_track_num_; }
base::TimeDelta audio_default_duration() const {
return audio_default_duration_;
int64 video_track_num() const { return video_track_num_; }
base::TimeDelta video_default_duration() const {
return video_default_duration_;
const uint8* video_encryption_key_id() const;
int video_encryption_key_id_size() const;
// WebMParserClient methods
virtual WebMParserClient* OnListStart(int id) OVERRIDE;
virtual bool OnListEnd(int id) OVERRIDE;
virtual bool OnUInt(int id, int64 val) OVERRIDE;
virtual bool OnFloat(int id, double val) OVERRIDE;
virtual bool OnBinary(int id, const uint8* data, int size) OVERRIDE;
virtual bool OnString(int id, const std::string& str) OVERRIDE;
int64 timecode_scale_;
int64 track_type_;
int64 track_num_;
int64 track_default_duration_;
scoped_ptr<WebMContentEncodingsClient> track_content_encodings_client_;
int64 audio_track_num_;
base::TimeDelta audio_default_duration_;
scoped_ptr<WebMContentEncodingsClient> audio_content_encodings_client_;
int64 video_track_num_;
base::TimeDelta video_default_duration_;
scoped_ptr<WebMContentEncodingsClient> video_content_encodings_client_;
} // namespace media