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This is in preparation of further changes to the way the audio level is computed and to allow recording and sending of the waveform. The main reasoning behind the change is twofold: 1) We don't need the precision of Double in our context (we just need a rough indication of the changes in audio level to successfully draw a level meter or a waveform in our UI). 2) Performance: It is true that on 64 bit CPUs single operations involving Floats or Doubles take the same amount of time (i.e one clock cycle). But there are other aspects here that vouch in favor of Floats: - A float takes half the space in memory compared to a double, so when storing long lists of them this can add up. - On Android O and greater the ART runtime can "vectorize" certain operations on lists and make use of the CPU's SIMD registers which are generally 128 bits. So by using floats 4 of them can fit and be computed at the same time whilst with doubles only 2 will fit halving the throughput. References: - https://source.android.com/docs/core/runtime/improvements - https://www.slideshare.net/linaroorg/automatic-vectorization-in-art-android-runtime-sfo17216
Element X Android
Element X Android is a Matrix Android Client provided by element.io. This app is currently in a pre-alpha release stage with only basic functionalities.
The application is a total rewrite of Element-Android using the Matrix Rust SDK underneath and targeting devices running Android 6+. The UI layer is written using Jetpack Compose, and the navigation is managed using Appyx.
Learn more about why we are building Element X in our blog post: https://element.io/blog/element-x-experience-the-future-of-element/.
Table of contents
Screenshots
Here are some early screenshots of the application:
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Rust SDK
Element X leverages the Matrix Rust SDK through an FFI layer that the final client can directly import and use.
We're doing this as a way to share code between platforms and while we've seen promising results it's still in the experimental stage and bound to change.
Status
This project is in work in progress. The app does not cover yet all functionalities we expect. The list of supported features can be found in this issue.
Contributing
Want to get actively involved in the project? You're more than welcome! A good way to start is to check the issues that are labelled with the good first issue label. Let us know by commenting the issue that you're starting working on it.
But first make sure to read our contribution guide first.
You can also come chat with the community in the Matrix room dedicated to the project.
Build instructions
Just clone the project and open it in Android Studio.
Makes sure to select the app configuration when building (as we also have sample apps in the project).
Support
When you are experiencing an issue on Element X Android, please first search in GitHub issues and then in #element-x-android:matrix.org. If after your research you still have a question, ask at #element-x-android:matrix.org. Otherwise feel free to create a GitHub issue if you encounter a bug or a crash, by explaining clearly in detail what happened. You can also perform bug reporting from the application settings. This is especially recommended when you encounter a crash.
Copyright & License
Copyright © New Vector Ltd
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with the License. You may obtain a copy of the License in the LICENSE file, or 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.