Alexa Voice Service Device SDK Dependencies
The Alexa Voice Service (AVS) Device SDK requires dependencies to compile and run. These dependencies include compilers, build tools, and open source libraries. The following section lists these dependencies and the minimum versions tested against the SDK.
The AVS Device SDK requires the following dependencies to build. Make sure that you're using the minimum version or higher that's listed in the following table.
The AVS Device SDK provides C++-based libraries that enable your device to process audio inputs and triggers, establish persistent connections with AVS, and handle all Alexa interactions.
To use the AVS Device SDK, your device must be able to build and run C++11.
The AVS Device SDK runs on most Linux-based platforms. For point of reference, it offers two sample applications that are built and tested on the platforms listed in the following table.
|Raspberry Pi||Model: 3B or 4. OS: Raspbian Bullseye|
If you're using Ubuntu, Raspberry Pi, or macOS, you need a compiler to build the AVS Device SDK. The following table shows supported compilers.
|GNU Compiler Collection (GCC)||4.8.5, 5.0|
The AVS Device SDK uses the CMake build tool to compile dependencies and automate build tasks. CMake is a cross-platform set of tools that manages your app dependencies and creates a native makefile and workspaces suitable for the platform you're building with. It helps you create, build, and test projects with the AVS Device SDK.
The following table shows the supported build tool versions.
The following table shows the open source libraries and their respective dependencies—libcurl, nghttp2, and OpenSSL—that the AVS Device SDK uses.
Core music provider
The AVS Device SDK doesn't provide support for music itself. However, to pass product testing and certification, all Alexa devices must support the following AVS music service providers. The following table shows the audio libraries, packages, and dependencies that are tested and work with the SDK.
The SDK plays media from music streaming services including Amazon Music, TuneIn, iHeart Radio, Pandora, Sirius XM, and more. For more details about supporting Apple music, see Media Player.
|Crypto library||For HLS demuxers||1.8.4 or earlier|
|libsoup||An HTTP client/server library used by GStreamer||2.6.5 or earlier|
|libfaad-dev||AAC and HE-AAC decoding||1.10.4|
|GStreamer Bad Plug-ins||A set of GStreamer plug-ins that aren't up to par compared to the rest||1.10.4|
Hardware security module
You can use the PKCS#11 API to integrate a hardware security module into the SDK. To use this feature, install the libraries shown in the following table.
|Platform-Specific PKCS#11 Library||2.40|
You can enable several optional features in the AVS Device SDK. These features require an additional set of dependencies, as described in the following tables.
For more details about how to enable Alerts, see Features.
Building the SDK with the asset manager is optional. To enable this feature, install the following dependencies. For more details about using asset manager, see Asset Manager.
Building with Bluetooth is optional and is supported on Linux or Raspberry Pi. You can use the following Bluetooth protocols:
To enable BlueZ and PulseAudio, the SDK uses the libraries, modules, and dependencies shown in the following table. You can choose to build with different dependencies, however, they haven't been explicitly tested against the SDK.
|libpulse-dev - Required if enabling this particular CMake variable:
|PulseAudio and PulseAudio Bluetooth (or equivalent) - Used to handle audio routing||12.2 or earlier|
The MediaPlayerInterface enables you to add sourcing, playback control, navigation, and querying the state of media content. Building with the
MediaPlayerInterface is optional. To build this interface, you must install the libraries, plug-ins, and dependencies shown in the following table.
|GStreamer Base Plug-ins||1.8.3|
|GStreamer Good Plug-ins||1.8.3|
|GStreamer Libav Plug-ins or GStreamer Ugly Plug-ins for decoding MP3 data||1.8.3|
SAMPLE-AES decryption is optional. For more details about how to enable SAMPLE-AES decryption, see Features.
|FFmpeg||4.0.0 - 4.4.2|