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// Copyright (c) 2016 The WebM project authors. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
#include "src/segment_parser.h"
#include "src/chapters_parser.h"
#include "src/cluster_parser.h"
#include "src/cues_parser.h"
#include "src/info_parser.h"
#include "src/seek_head_parser.h"
#include "src/skip_callback.h"
#include "src/tags_parser.h"
#include "src/tracks_parser.h"
#include "webm/id.h"
namespace webm {
SegmentParser::SegmentParser()
: MasterParser(MakeChild<ChaptersParser>(Id::kChapters),
MakeChild<ClusterParser>(Id::kCluster),
MakeChild<CuesParser>(Id::kCues),
MakeChild<InfoParser>(Id::kInfo),
MakeChild<SeekHeadParser>(Id::kSeekHead),
MakeChild<TagsParser>(Id::kTags),
MakeChild<TracksParser>(Id::kTracks)) {}
Status SegmentParser::Init(const ElementMetadata& metadata,
std::uint64_t max_size) {
assert(metadata.size == kUnknownElementSize || metadata.size <= max_size);
begin_done_ = false;
parse_completed_ = false;
return MasterParser::Init(metadata, max_size);
}
void SegmentParser::InitAfterSeek(const Ancestory& child_ancestory,
const ElementMetadata& child_metadata) {
MasterParser::InitAfterSeek(child_ancestory, child_metadata);
begin_done_ = true;
parse_completed_ = false;
action_ = Action::kRead;
}
Status SegmentParser::Feed(Callback* callback, Reader* reader,
std::uint64_t* num_bytes_read) {
assert(callback != nullptr);
assert(reader != nullptr);
assert(num_bytes_read != nullptr);
*num_bytes_read = 0;
if (!begin_done_) {
const ElementMetadata metadata{Id::kSegment, header_size(), size(),
position()};
const Status status = callback->OnSegmentBegin(metadata, &action_);
if (!status.completed_ok()) {
return status;
}
begin_done_ = true;
}
SkipCallback skip_callback;
if (action_ == Action::kSkip) {
callback = &skip_callback;
}
if (!parse_completed_) {
const Status status = MasterParser::Feed(callback, reader, num_bytes_read);
if (!status.completed_ok()) {
return status;
}
parse_completed_ = true;
}
return callback->OnSegmentEnd(
{Id::kSegment, header_size(), size(), position()});
}
bool SegmentParser::WasSkipped() const { return action_ == Action::kSkip; }
} // namespace webm
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