playground:playground
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playground:playground [2020/11/18 15:59] 127.0.0.1 external edit |
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| - | ====== | + | ====== |
| + | ===== Important ===== | ||
| + | This information in this page relates to the first release of the DTVkit TunerHAL implementation. This is an alpha release and has primarily been tested using the Android emulator. The Android emulator has certain restrictions in that only H264 video is currently supported and audio is not supported for broadcast media formats. The release has been made available for members that want to experiment with the code at an early stage. The release makes use of a modified version of the Android ' | ||
| + | |||
| + | |||
| + | =====Background===== | ||
| + | |||
| + | Android 11 introduces a new hardware abstraction layer for tuner, demux and descrambler the TunerHAL. This enables the front-end hardware components to be accessed using standard Android APIs in a platform independent manner. Android 11 also introduces new ' | ||
| + | |||
| + | =====Overview===== | ||
| + | |||
| + | The DTVKit Android Tuner HAL solution integrates DVBCore with Android using the Android TV Input Framework (TIF) and the Android Tuner Framework. By using the TIF and the Tuner Framework, manufacturers can provide a TV input source that new and existing apps, such as Live Channels, can use through a standard Android API. | ||
| + | |||
| + | =====DTVKit Android Architecture===== | ||
| + | {{: | ||
| + | |||
| + | =====Input Source===== | ||
| + | |||
| + | The input source is built as an Android system application. It provides: | ||
| + | |||
| + | - A TvInputService/ | ||
| + | - The set up activity. This is launched by the TV app (e.g. Live Channels) and provides a user-interface for doing a service search.\\ | ||
| + | - The TV provider sync job. A background service that updates the TV provider database to match the channels and programs in the DVBCore database. | ||
| + | |||
| + | ====Companion Library==== | ||
| + | |||
| + | The TV input source uses parts of the companion library (Apache License 2.0), which can be found in the Android TV sample inputs project (the companion library is not used as a third-party library, but is copied into the project). | ||
| + | |||
| + | Our copy has a number of modifications. We have removed ads, XMLTV parsing, the template set up activity and the base TV input service (which has been replaced by our own implementation). | ||
| + | |||
| + | =====Building DTVKit Android 11 Reference===== | ||
| + | |||
| + | The repository can be cloned from [[https:// | ||
| + | |||
| + | ====Build and installation==== | ||
| + | 1. Set up Android build environment | ||
| + | < | ||
| + | source build/ | ||
| + | lunch BUILD_TARGET | ||
| + | </ | ||
| + | 2. Clone the DTVKit Android components and overlay DVBCore | ||
| + | < | ||
| + | cd $ANDROID_BUILD_TOP | ||
| + | git clone https:// | ||
| + | git clone https:// | ||
| + | </ | ||
| + | 3. Build androidtunerlibrary module and native library | ||
| + | < | ||
| + | mmm external/ | ||
| + | </ | ||
| + | 4. Copy the built libraries into tis module as dependencies | ||
| + | < | ||
| + | cd external/ | ||
| + | mkdir -p tis/libs | ||
| + | cp $ANDROID_PRODUCT_OUT/ | ||
| + | cp $ANDROID_PRODUCT_OUT/ | ||
| + | </ | ||
| + | 5. Build tis module (TV input service app) using Gradle. This can be done from within Android Studio or command line | ||
| + | |||
| + | 6. Sign the built app with the platform keys from your Android source | ||
| + | < | ||
| + | SIGN_APK_JAR=$ANDROID_BUILD_TOP/ | ||
| + | PLATFORM_KEYS_DIR=$ANDROID_BUILD_TOP/ | ||
| + | PLATFORM_KEYS=" | ||
| + | |||
| + | java -Djava.library.path=" | ||
| + | </ | ||
| + | 7. Run the zipalign tool | ||
| + | < | ||
| + | ZIPALIGN=$ANDROID_SDK/ | ||
| + | |||
| + | $ZIPALIGN -p -f -v 4 ./ | ||
| + | </ | ||
| + | 8. Install native library onto device | ||
| + | < | ||
| + | adb root | ||
| + | adb remount | ||
| + | adb push ./ | ||
| + | </ | ||
| + | 9. Install the TIS app onto device as a system app. First time installation will require device | ||
| + | reboot after running the following command: | ||
| + | < | ||
| + | adb push ./ | ||
| + | </ | ||
| + | |||
| + | =====Building DTVKit Android 11 TunerHAL===== | ||
| + | The repository can be cloned from [[https:// | ||
| + | ====Build and installation==== | ||
| + | 1. Clone repo and copy '' | ||
| + | |||
| + | 2. Build the tuner interface | ||
| + | < | ||
| + | cd $ANDROID_BUILD_TOP | ||
| + | mmm hardware/ | ||
| + | </ | ||
| + | 3. Install the built service onto device | ||
| + | < | ||
| + | adb root | ||
| + | adb remount | ||
| + | adb push $ANDROID_PRODUCT_OUT/ | ||
| + | </ | ||
| + | |||
| + | ====Run==== | ||
| + | This Tuner HAL implementation looks for TS files under ''/ | ||
| + | =====SELinux Configuration Android 11===== | ||
| + | Android uses Security-Enhanced Linux (SELinux) to enforce mandatory access control (MAC) over all processes. SELinux operates in two modes: | ||
| + | * Permissive - SELinux security policy is not enforced, only logged | ||
| + | * Enforcing - SELinux security policy is enforced and logged | ||
| + | |||
| + | ====Permissive Mode==== | ||
| + | For non-production devices (e.g. development) SELinux can be disabled by setting it to permissive mode. | ||
| + | |||
| + | Currently the DTVKit Tuner HAL solution only works in permissive mode. | ||
playground/playground.1605715172.txt.gz ยท Last modified: 2020/11/18 15:59 by 127.0.0.1
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