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libwebsockets/minimal-examples/secure-streams/minimal-secure-streams-alexa
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Andy Green b3131fdfdd cmakelist: Augean Stables refactor 
Establish a new distributed CMake architecture with CMake code related to
a source directory moving to be in the subdir in its own CMakeLists.txt.
In particular, there's now one in ./lib which calls through to ones
further down the directory tree like ./lib/plat/xxx, ./lib/roles/xxx etc.

This cuts the main CMakelists.txt from 98KB -> 33KB, about a 66% reduction,
and it's much easier to maintain sub-CMakeLists.txt that are in the same
directory as the sources they manage, and conceal all the details that that
level.

Child CMakelists.txt become responsible for:

 - include_directories() definition (this is not supported by CMake
   directly, it passes it back up via PARENT_SCOPE vars in helper
   macros)

 - Addition child CMakeLists.txt inclusion, for example toplevel ->
   role -> role subdir

 - Source file addition to the build

 - Dependent library path resolution... this is now a private thing
   in the child CMakeLists.txt, it just passes back any adaptations
   to include_directories() and the LIB_LIST without filling the
   parent namespace with the details
2020-05-27 08:40:12 +01:00
..
alexa.c client: secure streams 2020-03-04 12:17:49 +00:00
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
$