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libwebsockets/minimal-examples-lowlevel/secure-streams/minimal-secure-streams-alexa
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Andy Green 47efb8c1c2 cmake: set minimum to 3.10 
CMake is continually deprecating old cmake, such that if we don't try to
keep up with its minimum version there are warnings or eventually failures
to build.  Windows vcpkg has latest 4.03 which prints warning messages if
your CMakeLists.txt has a VERSION < 3.10.  So let's upgrade all the
CMakeLists.txt to that as the minimum.
2025-06-19 14:48:23 +01:00
..
alexa.c examples: move existing to m-e-lowlevel and start repoulating m-e with SS 2021-10-08 09:49:05 +01:00
alexa_linux.ppn examples: move existing to m-e-lowlevel and start repoulating m-e with SS 2021-10-08 09:49:05 +01:00
audio.c examples: move existing to m-e-lowlevel and start repoulating m-e with SS 2021-10-08 09:49:05 +01:00
CMakeLists.txt cmake: set minimum to 3.10 2025-06-19 14:48:23 +01:00
main.c examples: move existing to m-e-lowlevel and start repoulating m-e with SS 2021-10-08 09:49:05 +01:00
porcupine_params.pv examples: move existing to m-e-lowlevel and start repoulating m-e with SS 2021-10-08 09:49:05 +01:00
private.h examples: move existing to m-e-lowlevel and start repoulating m-e with SS 2021-10-08 09:49:05 +01:00
README.md examples: move existing to m-e-lowlevel and start repoulating m-e with SS 2021-10-08 09:49:05 +01:00

README.md

lws secure streams alexa

This demonstrates AVS Alexa usage using secure streams. It connects to AVS, uses your linux computer's microphone to wait for the 'alexa' wakeword, sends the utterance to AVS and plays back the result.

build

There are some special build considerations:

  1. Build lws with cmake options -DLWS_WITH_ALSA=1 -DLWS_WITH_SECURE_STREAMS=1

  2. Install distro build dependency packages:

Dependency Ubuntu package Fedora Package
libasound libasound2-dev alsa-lib-devel
mpg123 libmpg123-dev mpg123-devel

  1. Clone Picovoice Porcupine Apache-licensed demo version from here

    https://github.com/Picovoice/porcupine

    It provides binary libs for wakeword detection on various platforms. Copy the headers and binary lib to your build context, eg, for native x86_64

   $ sudo cp ./include/* /usr/include
   $ sudo cp ./lib/linux/x86_64/libpv_porcupine.* /usr/lib
   $ sudo ldconfig

Enter the minimal example dir for secure-streams-alexa and make the sample

   $ cd ./minimal-examples/secure-streams/minimal-secure-streams-alexa
   $ cmake .
   $ make

usage

 $ ./lws-minimal-secure-streams-alexa
[2019/10/16 16:22:01:1097] U: LWS secure streams - Alex voice test [-d<verb>]
[2019/10/16 16:22:01:1115] N: lws_create_context: creating Secure Streams policy
[2019/10/16 16:22:01:1115] N: lwsac_use: alloc 1532 for 1
[2019/10/16 16:22:01:1119] N: lwsac_use: alloc 288 for 168
[2019/10/16 16:22:01:1119] N: lws_ss_policy_set: policy lwsac size:     1.796KiB, pad 11%
[2019/10/16 16:22:02:4114] N: lws_ss_client_connect: connecting 0 api.amazon.com /auth/o2/token
[2019/10/16 16:22:02:8686] N: auth_api_amazon_com_parser_cb: expires in 3600
[2019/10/16 16:22:02:8686] N: ss_api_amazon_auth_rx: acquired 656-byte api.amazon.com auth token
[2019/10/16 16:22:02:8754] N: lws_ss_client_connect: connecting 1 alexa.na.gateway.devices.a2z.com /v20160207/directives
[2019/10/16 16:22:02:3182] N: secstream_h2: h2 client entering LONG_POLL
[2019/10/16 16:22:02:3183] U: Connected to Alexa... speak "Alexa, ..."
[2019/10/16 16:22:06:9380] W: ************* Wakeword
[2019/10/16 16:22:06:9380] N: avs_query_start:
[2019/10/16 16:22:06:9381] N: lws_ss_client_connect: connecting 1 alexa.na.gateway.devices.a2z.com /v20160207/events
[2019/10/16 16:22:06:9381] N: lws_vhost_active_conns: just join h2 directly
[2019/10/16 16:22:06:9384] N: metadata done
[2019/10/16 16:22:06:1524] N: est: 42 1
[2019/10/16 16:22:06:3723] N: est: 108 1
[2019/10/16 16:22:07:5914] N: est: 352 1
[2019/10/16 16:22:07:8112] N: est: 4284 1
[2019/10/16 16:22:07:0300] N: est: 3369 1
[2019/10/16 16:22:07:2325] N: est: 577 1
[2019/10/16 16:22:08:4519] N: est: 9 1
[2019/10/16 16:22:08:6716] N: est: 3 1
[2019/10/16 16:22:08:6718] N: est: 11 1
[2019/10/16 16:22:08:8915] N: est: 10 1
[2019/10/16 16:22:08:8915] W: callback_audio: ended capture
[2019/10/16 16:22:09:0993] N: identified reply...
^C[2019/10/16 16:22:14:3067] U: Disconnected from Alexa
[2019/10/16 16:22:14:3123] U: Completed
$