Line data    Source code

       1              : /*
       2              :  * If not stated otherwise in this file or this component's LICENSE file the
       3              :  * following copyright and licenses apply:
       4              :  *
       5              :  * Copyright 2022 Sky UK
       6              :  *
       7              :  * Licensed under the Apache License, Version 2.0 (the "License");
       8              :  * you may not use this file except in compliance with the License.
       9              :  * You may obtain a copy of the License at
      10              :  *
      11              :  * http://www.apache.org/licenses/LICENSE-2.0
      12              :  *
      13              :  * Unless required by applicable law or agreed to in writing, software
      14              :  * distributed under the License is distributed on an "AS IS" BASIS,
      15              :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      16              :  * See the License for the specific language governing permissions and
      17              :  * limitations under the License.
      18              :  */
      19              : 
      20              : #include "DataReaderFactory.h"
      21              : #include "DataReaderV1.h"
      22              : #include "DataReaderV2.h"
      23              : #include "ShmCommon.h"
      24              : #include "ShmUtils.h"
      25              : 
      26              : namespace
      27              : {
      28            3 : uint32_t readLEUint32(const uint8_t *buffer)
      29              : {
      30            3 :     uint32_t value = buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
      31            3 :     return value;
      32              : }
      33              : } // namespace
      34              : 
      35              : namespace firebolt::rialto::server
      36              : {
      37            3 : std::shared_ptr<IDataReader> DataReaderFactory::createDataReader(const MediaSourceType &mediaSourceType,
      38              :                                                                  std::uint8_t *buffer, std::uint32_t dataOffset,
      39              :                                                                  std::uint32_t numFrames) const
      40              : {
      41              :     // Version is always first 4 bytes of data
      42            3 :     std::uint8_t *metadata = buffer + dataOffset;
      43            3 :     std::uint32_t version = readLEUint32(metadata);
      44            3 :     if (1 == version)
      45              :     {
      46            1 :         std::uint32_t metadataOffsetWithoutVersion = dataOffset + common::VERSION_SIZE_BYTES;
      47            1 :         return std::make_shared<DataReaderV1>(mediaSourceType, buffer, metadataOffsetWithoutVersion, numFrames);
      48              :     }
      49            2 :     if (2 == version)
      50              :     {
      51            1 :         std::uint32_t v2DataOffset = dataOffset + getMaxMetadataBytes();
      52            1 :         return std::make_shared<DataReaderV2>(mediaSourceType, buffer, v2DataOffset, numFrames);
      53              :     }
      54            1 :     return nullptr;
      55              : }
      56              : } // namespace firebolt::rialto::server