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// Copyright (c) 2011 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 "media/webm/webm_info_parser.h"
#include "base/logging.h"
#include "media/webm/webm_constants.h"
namespace media {
WebMInfoParser::WebMInfoParser()
: timecode_scale_(-1),
duration_(-1) {
}
WebMInfoParser::~WebMInfoParser() {}
int WebMInfoParser::Parse(const uint8* buf, int size) {
return WebMParseListElement(buf, size, kWebMIdInfo, 1, this);
}
bool WebMInfoParser::OnListStart(int id) { return true; }
bool WebMInfoParser::OnListEnd(int id) {
if (id == kWebMIdInfo && timecode_scale_ == -1) {
// Set timecode scale to default value if it isn't present in
// the Info element.
timecode_scale_ = kWebMDefaultTimecodeScale;
}
return true;
}
bool WebMInfoParser::OnUInt(int id, int64 val) {
if (id != kWebMIdTimecodeScale)
return true;
if (timecode_scale_ != -1) {
VLOG(1) << "Multiple values for id " << std::hex << id << " specified";
return false;
}
timecode_scale_ = val;
return true;
}
bool WebMInfoParser::OnFloat(int id, double val) {
if (id != kWebMIdDuration) {
VLOG(1) << "Unexpected float for id" << std::hex << id;
return false;
}
if (duration_ != -1) {
VLOG(1) << "Multiple values for duration.";
return false;
}
duration_ = val;
return true;
}
bool WebMInfoParser::OnBinary(int id, const uint8* data, int size) {
return true;
}
bool WebMInfoParser::OnString(int id, const std::string& str) {
return true;
}
bool WebMInfoParser::OnSimpleBlock(int track_num, int timecode, int flags,
const uint8* data, int size) {
return false;
}
} // namespace media
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