50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
// Copyright (c) 2016 The WebM project authors. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the LICENSE file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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#include "src/unknown_parser.h"
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#include <cassert>
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#include <cstdint>
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#include "webm/element.h"
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#include "webm/reader.h"
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#include "webm/status.h"
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namespace webm {
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Status UnknownParser::Init(const ElementMetadata& metadata,
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std::uint64_t max_size) {
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assert(metadata.size == kUnknownElementSize || metadata.size <= max_size);
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if (metadata.size == kUnknownElementSize) {
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return Status(Status::kIndefiniteUnknownElement);
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}
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metadata_ = metadata;
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bytes_remaining_ = metadata.size;
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return Status(Status::kOkCompleted);
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}
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Status UnknownParser::Feed(Callback* callback, Reader* reader,
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std::uint64_t* num_bytes_read) {
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assert(callback != nullptr);
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assert(reader != nullptr);
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assert(num_bytes_read != nullptr);
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const std::uint64_t original_bytes_remaining = bytes_remaining_;
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const Status status =
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callback->OnUnknownElement(metadata_, reader, &bytes_remaining_);
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assert(bytes_remaining_ <= original_bytes_remaining);
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*num_bytes_read = original_bytes_remaining - bytes_remaining_;
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return status;
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}
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} // namespace webm
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