75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
// Copyright 2017 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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#include "packager/media/formats/webvtt/webvtt_timestamp.h"
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#include <ctype.h>
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#include "packager/base/logging.h"
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#include "packager/base/strings/string_number_conversions.h"
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namespace shaka {
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namespace media {
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namespace {
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bool GetTotalMilliseconds(uint64_t hours,
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uint64_t minutes,
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uint64_t seconds,
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uint64_t ms,
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uint64_t* out) {
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DCHECK(out);
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if (minutes > 59 || seconds > 59 || ms > 999) {
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VLOG(1) << "Hours:" << hours
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<< " Minutes:" << minutes
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<< " Seconds:" << seconds
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<< " MS:" << ms
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<< " shoud have never made it to GetTotalMilliseconds";
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return false;
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}
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*out = 60 * 60 * 1000 * hours +
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60 * 1000 * minutes +
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1000 * seconds +
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ms;
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return true;
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}
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} // namespace
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bool WebVttTimestampParse(const base::StringPiece& source, uint64_t* out) {
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DCHECK(out);
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if (source.length() < 9) {
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LOG(WARNING) << "Timestamp '" << source << "' is mal-formed";
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return false;
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}
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const size_t minutes_begin = source.length() - 9;
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const size_t seconds_begin = source.length() - 6;
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const size_t milliseconds_begin = source.length() - 3;
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uint64_t hours = 0;
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uint64_t minutes = 0;
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uint64_t seconds = 0;
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uint64_t ms = 0;
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const bool has_hours = minutes_begin >= 3 &&
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source[minutes_begin-1] == ':' &&
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base::StringToUint64(source.substr(0, minutes_begin-1), &hours);
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if ((minutes_begin == 0 || has_hours) &&
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source[seconds_begin-1] == ':' &&
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source[milliseconds_begin-1] == '.' &&
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base::StringToUint64(source.substr(minutes_begin, 2), &minutes) &&
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base::StringToUint64(source.substr(seconds_begin, 2), &seconds) &&
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base::StringToUint64(source.substr(milliseconds_begin, 3), &ms)) {
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return GetTotalMilliseconds(hours, minutes, seconds, ms, out);
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}
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LOG(WARNING) << "Timestamp '" << source << "' is mal-formed";
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return false;
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}
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} // namespace media
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} // namespace shaka
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