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50 lines
1.5 KiB
50 lines
1.5 KiB
// 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/id_element_parser.h"
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#include <cassert>
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#include <cstdint>
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#include "src/element_parser.h"
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#include "src/parser_utils.h"
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#include "webm/callback.h"
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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 IdElementParser::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 == 0 || metadata.size > 4) {
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return Status(Status::kInvalidElementSize);
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}
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num_bytes_remaining_ = static_cast<int>(metadata.size);
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value_ = static_cast<Id>(0);
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return Status(Status::kOkCompleted);
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}
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Status IdElementParser::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 Status status = AccumulateIntegerBytes(num_bytes_remaining_, reader,
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&value_, num_bytes_read);
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num_bytes_remaining_ -= static_cast<int>(*num_bytes_read);
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return status;
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}
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} // namespace webm
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