1*103e46e4SHarish Mahendrakar // Copyright (c) 2016 The WebM project authors. All Rights Reserved. 2*103e46e4SHarish Mahendrakar // 3*103e46e4SHarish Mahendrakar // Use of this source code is governed by a BSD-style license 4*103e46e4SHarish Mahendrakar // that can be found in the LICENSE file in the root of the source 5*103e46e4SHarish Mahendrakar // tree. An additional intellectual property rights grant can be found 6*103e46e4SHarish Mahendrakar // in the file PATENTS. All contributing project authors may 7*103e46e4SHarish Mahendrakar // be found in the AUTHORS file in the root of the source tree. 8*103e46e4SHarish Mahendrakar #include "src/unknown_parser.h" 9*103e46e4SHarish Mahendrakar 10*103e46e4SHarish Mahendrakar #include <cassert> 11*103e46e4SHarish Mahendrakar #include <cstdint> 12*103e46e4SHarish Mahendrakar 13*103e46e4SHarish Mahendrakar #include "webm/element.h" 14*103e46e4SHarish Mahendrakar #include "webm/reader.h" 15*103e46e4SHarish Mahendrakar #include "webm/status.h" 16*103e46e4SHarish Mahendrakar 17*103e46e4SHarish Mahendrakar namespace webm { 18*103e46e4SHarish Mahendrakar Init(const ElementMetadata & metadata,std::uint64_t max_size)19*103e46e4SHarish MahendrakarStatus UnknownParser::Init(const ElementMetadata& metadata, 20*103e46e4SHarish Mahendrakar std::uint64_t max_size) { 21*103e46e4SHarish Mahendrakar assert(metadata.size == kUnknownElementSize || metadata.size <= max_size); 22*103e46e4SHarish Mahendrakar 23*103e46e4SHarish Mahendrakar if (metadata.size == kUnknownElementSize) { 24*103e46e4SHarish Mahendrakar return Status(Status::kIndefiniteUnknownElement); 25*103e46e4SHarish Mahendrakar } 26*103e46e4SHarish Mahendrakar 27*103e46e4SHarish Mahendrakar metadata_ = metadata; 28*103e46e4SHarish Mahendrakar bytes_remaining_ = metadata.size; 29*103e46e4SHarish Mahendrakar 30*103e46e4SHarish Mahendrakar return Status(Status::kOkCompleted); 31*103e46e4SHarish Mahendrakar } 32*103e46e4SHarish Mahendrakar Feed(Callback * callback,Reader * reader,std::uint64_t * num_bytes_read)33*103e46e4SHarish MahendrakarStatus UnknownParser::Feed(Callback* callback, Reader* reader, 34*103e46e4SHarish Mahendrakar std::uint64_t* num_bytes_read) { 35*103e46e4SHarish Mahendrakar assert(callback != nullptr); 36*103e46e4SHarish Mahendrakar assert(reader != nullptr); 37*103e46e4SHarish Mahendrakar assert(num_bytes_read != nullptr); 38*103e46e4SHarish Mahendrakar 39*103e46e4SHarish Mahendrakar const std::uint64_t original_bytes_remaining = bytes_remaining_; 40*103e46e4SHarish Mahendrakar const Status status = 41*103e46e4SHarish Mahendrakar callback->OnUnknownElement(metadata_, reader, &bytes_remaining_); 42*103e46e4SHarish Mahendrakar assert(bytes_remaining_ <= original_bytes_remaining); 43*103e46e4SHarish Mahendrakar 44*103e46e4SHarish Mahendrakar *num_bytes_read = original_bytes_remaining - bytes_remaining_; 45*103e46e4SHarish Mahendrakar 46*103e46e4SHarish Mahendrakar return status; 47*103e46e4SHarish Mahendrakar } 48*103e46e4SHarish Mahendrakar 49*103e46e4SHarish Mahendrakar } // namespace webm 50