diff options
Diffstat (limited to 'src/com/android/providers/downloads/DrmConvertSession.java')
| -rw-r--r-- | src/com/android/providers/downloads/DrmConvertSession.java | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/src/com/android/providers/downloads/DrmConvertSession.java b/src/com/android/providers/downloads/DrmConvertSession.java new file mode 100644 index 00000000..d10edf14 --- /dev/null +++ b/src/com/android/providers/downloads/DrmConvertSession.java @@ -0,0 +1,171 @@ +/* + * Copyright (C) 2011 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ +package com.android.providers.downloads; + +import android.content.Context; +import android.drm.DrmConvertedStatus; +import android.drm.DrmManagerClient; +import android.util.Log; +import android.provider.Downloads; + +import java.io.FileNotFoundException; +import java.io.IOException; +import java.io.RandomAccessFile; + + +public class DrmConvertSession { + private DrmManagerClient mDrmClient; + private int mConvertSessionId; + + private DrmConvertSession(DrmManagerClient drmClient, int convertSessionId) { + mDrmClient = drmClient; + mConvertSessionId = convertSessionId; + } + + /** + * Start of converting a file. + * + * @param context The context of the application running the convert session. + * @param mimeType Mimetype of content that shall be converted. + * @return A convert session or null in case an error occurs. + */ + public static DrmConvertSession open(Context context, String mimeType) { + DrmManagerClient drmClient = null; + int convertSessionId = -1; + if (context != null && mimeType != null && !mimeType.equals("")) { + try { + drmClient = new DrmManagerClient(context); + try { + convertSessionId = drmClient.openConvertSession(mimeType); + } catch (IllegalArgumentException e) { + Log.w(Constants.TAG, "Conversion of Mimetype: " + mimeType + + " is not supported.", e); + } catch (IllegalStateException e) { + Log.w(Constants.TAG, "Could not access Open DrmFramework.", e); + } + } catch (IllegalArgumentException e) { + Log.w(Constants.TAG, + "DrmManagerClient instance could not be created, context is Illegal."); + } catch (IllegalStateException e) { + Log.w(Constants.TAG, "DrmManagerClient didn't initialize properly."); + } + } + + if (drmClient == null || convertSessionId < 0) { + return null; + } else { + return new DrmConvertSession(drmClient, convertSessionId); + } + } + /** + * Convert a buffer of data to protected format. + * + * @param buffer Buffer filled with data to convert. + * @param size The number of bytes that shall be converted. + * @return A Buffer filled with converted data, if execution is ok, in all + * other case null. + */ + public byte [] convert(byte[] inBuffer, int size) { + byte[] result = null; + if (inBuffer != null) { + DrmConvertedStatus convertedStatus = null; + try { + if (size != inBuffer.length) { + byte[] buf = new byte[size]; + System.arraycopy(inBuffer, 0, buf, 0, size); + convertedStatus = mDrmClient.convertData(mConvertSessionId, buf); + } else { + convertedStatus = mDrmClient.convertData(mConvertSessionId, inBuffer); + } + + if (convertedStatus != null && + convertedStatus.statusCode == DrmConvertedStatus.STATUS_OK && + convertedStatus.convertedData != null) { + result = convertedStatus.convertedData; + } + } catch (IllegalArgumentException e) { + Log.w(Constants.TAG, "Buffer with data to convert is illegal. Convertsession: " + + mConvertSessionId, e); + } catch (IllegalStateException e) { + Log.w(Constants.TAG, "Could not convert data. Convertsession: " + + mConvertSessionId, e); + } + } else { + throw new IllegalArgumentException("Parameter inBuffer is null"); + } + return result; + } + + /** + * Ends a conversion session of a file. + * + * @param fileName The filename of the converted file. + * @return Downloads.Impl.STATUS_SUCCESS if execution is ok. + * Downloads.Impl.STATUS_FILE_ERROR in case converted file can not + * be accessed. Downloads.Impl.STATUS_NOT_ACCEPTABLE if a problem + * occurs when accessing drm framework. + * Downloads.Impl.STATUS_UNKNOWN_ERROR if a general error occurred. + */ + public int close(String filename) { + DrmConvertedStatus convertedStatus = null; + int result = Downloads.Impl.STATUS_UNKNOWN_ERROR; + if (mDrmClient != null && mConvertSessionId >= 0) { + try { + convertedStatus = mDrmClient.closeConvertSession(mConvertSessionId); + if (convertedStatus == null || + convertedStatus.statusCode != DrmConvertedStatus.STATUS_OK || + convertedStatus.convertedData == null) { + result = Downloads.Impl.STATUS_NOT_ACCEPTABLE; + } else { + RandomAccessFile rndAccessFile = null; + try { + rndAccessFile = new RandomAccessFile(filename, "rw"); + rndAccessFile.seek(convertedStatus.offset); + rndAccessFile.write(convertedStatus.convertedData); + result = Downloads.Impl.STATUS_SUCCESS; + } catch (FileNotFoundException e) { + result = Downloads.Impl.STATUS_FILE_ERROR; + Log.w(Constants.TAG, "File: " + filename + " could not be found.", e); + } catch (IOException e) { + result = Downloads.Impl.STATUS_FILE_ERROR; + Log.w(Constants.TAG, "Could not access File: " + filename + " .", e); + } catch (IllegalArgumentException e) { + result = Downloads.Impl.STATUS_FILE_ERROR; + Log.w(Constants.TAG, "Could not open file in mode: rw", e); + } catch (SecurityException e) { + Log.w(Constants.TAG, "Access to File: " + filename + + " was denied denied by SecurityManager.", e); + } finally { + if (rndAccessFile != null) { + try { + rndAccessFile.close(); + } catch (IOException e) { + result = Downloads.Impl.STATUS_FILE_ERROR; + Log.w(Constants.TAG, "Failed to close File:" + filename + + ".", e); + } + } + } + } + } catch (IllegalStateException e) { + Log.w(Constants.TAG, "Could not close convertsession. Convertsession: " + + mConvertSessionId, e); + } + } + return result; + } +} |