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libwebsockets/minimal-examples/secure-streams/minimal-secure-streams-alexa
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Andy Green 286cf4357a sul: multiple timer domains 
Adapt the pt sul owner list to be an array, and define two different lists,
one that acts like before and is the default for existing users, and another
that has the ability to cooperate with systemwide suspend to restrict the
interval spent suspended so that it will wake in time for the earliest
thing on this wake-suspend sul list.

Clean the api a bit and add lws_sul_cancel() that only needs the sul as the
argument.

Add a flag for client creation info to indicate that this client connection
is important enough that, eg, validity checking it to detect silently dead
connections should go on the wake-suspend sul list.  That flag is exposed in
secure streams policy so it can be added to a streamtype with
"swake_validity": true

Deprecate out the old vhost timer stuff that predates sul.  Add a flag
LWS_WITH_DEPRECATED_THINGS in cmake so users can get it back temporarily
before it will be removed in a v4.2.

Adapt all remaining in-tree users of it to use explicit suls.
2020-06-02 08:37:10 +01:00
..
alexa.c sul: multiple timer domains 2020-06-02 08:37:10 +01:00
alexa_linux.ppn client: secure streams 2020-03-04 12:17:49 +00:00
audio.c client: secure streams 2020-03-04 12:17:49 +00:00
CMakeLists.txt cmakelist: Augean Stables refactor 2020-05-27 08:40:12 +01:00
main.c client: secure streams 2020-03-04 12:17:49 +00:00
porcupine_params.pv client: secure streams 2020-03-04 12:17:49 +00:00
private.h client: secure streams 2020-03-04 12:17:49 +00:00
README.md client: secure streams 2020-03-04 12:17:49 +00:00

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
$