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Diffstat (limited to 'conf.d/project/lua.d/onload-aaaa-01-controls.lua')
| -rw-r--r-- | conf.d/project/lua.d/onload-aaaa-01-controls.lua | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/conf.d/project/lua.d/onload-aaaa-01-controls.lua b/conf.d/project/lua.d/onload-aaaa-01-controls.lua new file mode 100644 index 0000000..24c4f71 --- /dev/null +++ b/conf.d/project/lua.d/onload-aaaa-01-controls.lua @@ -0,0 +1,162 @@ +--[[ + Copyright (C) 2016 "IoT.bzh" + Author Fulup Ar Foll <fulup@iot.bzh> + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License 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. + + + Provide sample policy function for AGL Advance Audio Agent +--]] + +-- Global HAL registry +_Audio_Hal_Registry={} + +-- Callback when receiving HAL registry +function _Alsa_Get_Hal_CB (error, result, context) + -- Initialise an empty table + local registry={} + + -- Only process when response is valid + if (error) then + AFB_ErrOr ("[Audio_Init_CB] ErrOr result=%s", result) + return + end + + -- Extract response from result + local response=result["response"] + + -- Index HAL Bindings APIs by shortname + for key,value in pairs(response) do + registry[value["shortname"]]=value["api"] + end + + -- store Exiting HAL for further use + printf ("-- [Audio_Init_CB] -- Audio_register_Hal=%s", Dump_Table(registry)) + _Audio_Hal_Registry=registry + +end + +-- Function call at binding load time +function _Alsa_Get_Hal(args) + + printf ("[-- Audio_Get_Hal --] args=%s", Dump_Table(argsT)) + + -- Query AlsaCore for Active HALs (no query, no context) + AFB:service ('alsacore', 'hallist', {}, "_Alsa_Get_Hal_CB", {}) + +end + +-- In sample configuration Query/Args parsing is common to all audio control +local function Audio_Parse_Request (source, args, query) + + local apihal={} + + -- In this test we expect targeted device to be given from query (could come for args as well) + if (query == nil ) then + AFB:error ("--LUA:Audio_Set_Navigation query should contain and args with targeted apihal|device") + return -- refuse control + end + + -- Alsa Hook plugin asound sample config provides target sound card by name + if (query["device"] ~= nil) then + apihal=_Audio_Hal_Registry[query["device"]] + end + + -- HTML5 test page provides directly HAL api. + if (query["apihal"] ~= nil) then + apihal= query["apihal"] + end + + -- if requested HAL is not found then deny the control + if (apihal == nil) then + AFB:error ("--LUA:Audio_Set_Navigation No Active HAL Found") + return -- refuse control + end + + -- return api or nil when not found + return apihal +end + +-- Set Navigation lower sound when play +function _Audio_Set_Navigation(source, args, query) + + -- in strict mode every variables should be declared + local err=0 + local ctlhal={} + local response={} + local apihal={} + + AFB:notice ("LUA:Audio_Set_Use_Case source=%d args=%s query=%s", source, args, query); + + -- Parse Query/Args and if HAL not found then refuse access + apihal= Audio_Parse_Request (source, args, query) + if (apihal == nil) then return 1 end + + + -- if source < 0 then Alsa HookPlugin is closing PCM + if (source < 0) then + -- Ramp Up Multimedia channel synchronously + ctlhal={['label']='Master_Playback_Volume', ['val']=100} + err, response= AFB:servsync (apihal, 'ctlset',ctlhal) + else + -- Ramp Down Multimedia channel synchronously + ctlhal={['label']='Master_Playback_Volume', ['val']=50} + err, response= AFB:servsync (apihal, 'ctlset',ctlhal) + end + + if (err) then + AFB:error("--LUA:Audio_Set_Navigation halapi=%s refuse ctl=%s", apihal, ctlhal) + return 1 -- control refused + end + + + return 0 -- control accepted +end + + +-- Select Multimedia mode +function _Audio_Set_Multimedia (source, args, query) + + -- in strict mode every variables should be declared + local err=0 + local ctlhal={} + local response={} + local apihal={} + + AFB:notice ("LUA:Audio_Set_Use_Case source=%d args=%s query=%s", source, args, query); + + -- Parse Query/Args and if HAL not found then refuse access + apihal= Audio_Parse_Request (source, args, query) + if (apihal == nil) then return 1 end + + + -- if Mumtimedia control only increase volume on open + if (source >= 0) then + -- Ramp Down Multimedia channel synchronously + ctlhal={['label']='Master_Playback_Volume', ['val']=100} + err, response= AFB:servsync (apihal, 'ctlset',ctlhal) + end + + if (err) then + AFB:error("--LUA:Audio_Set_Navigation halapi=%s refuse ctl=%s", apihal, ctlhal) + return 1 -- control refused + end + + + return 0 -- control accepted +end + +-- Select Emergency Mode +function _Audio_Set_Emergency(source, args, query) + return 1 -- Always refuse in this test +end |