72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
// Copyright 2018 Google LLC 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
|
|
|
|
#include "packager/media/formats/webvtt/webvtt_file_buffer.h"
|
|
|
|
#include "packager/media/base/text_sample.h"
|
|
#include "packager/media/formats/webvtt/webvtt_timestamp.h"
|
|
|
|
namespace shaka {
|
|
namespace media {
|
|
namespace {
|
|
const char* kHeader = "WEBVTT\n\n";
|
|
}
|
|
|
|
WebVttFileBuffer::WebVttFileBuffer() {
|
|
// Make sure we start with the same state that we would end up with if
|
|
// the caller reset our state.
|
|
Reset();
|
|
}
|
|
|
|
void WebVttFileBuffer::Reset() {
|
|
sample_count_ = 0;
|
|
|
|
buffer_.clear();
|
|
buffer_.append(kHeader);
|
|
}
|
|
|
|
void WebVttFileBuffer::Append(const TextSample& sample) {
|
|
DCHECK_GT(buffer_.size(), 0u) << "The buffer should at least have a header";
|
|
|
|
sample_count_++;
|
|
|
|
// Ids are optional
|
|
if (sample.id().length()) {
|
|
buffer_.append(sample.id());
|
|
buffer_.append("\n"); // end of id
|
|
}
|
|
|
|
// Write the times that the sample elapses.
|
|
buffer_.append(MsToWebVttTimestamp(sample.start_time()));
|
|
buffer_.append(" --> ");
|
|
buffer_.append(MsToWebVttTimestamp(sample.EndTime()));
|
|
|
|
// Settings are optional
|
|
if (sample.settings().length()) {
|
|
buffer_.append(" ");
|
|
buffer_.append(sample.settings());
|
|
}
|
|
buffer_.append("\n"); // end of time & settings
|
|
|
|
buffer_.append(sample.payload());
|
|
buffer_.append("\n"); // end of payload
|
|
buffer_.append("\n"); // end of sample
|
|
}
|
|
|
|
bool WebVttFileBuffer::WriteTo(File* file) {
|
|
DCHECK(file);
|
|
DCHECK_GT(buffer_.size(), 0u) << "The buffer should at least have a header";
|
|
|
|
const int written = file->Write(buffer_.c_str(), buffer_.size());
|
|
if (written < 0) {
|
|
return false;
|
|
}
|
|
|
|
return static_cast<size_t>(written) == buffer_.size();
|
|
}
|
|
} // namespace media
|
|
} // namespace shaka
|