64 lines
1.8 KiB
Lua
64 lines
1.8 KiB
Lua
local _base64_encode_urlsafe = base64.encode_urlsafe
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local _random_bytes = random.bytes
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local core_token = _base64_encode_urlsafe(_random_bytes(18))
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local audio_input_tokens_store = {[core_token] = "core"}
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audio.input = {}
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local _gui_confirm = gui.confirm
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local _debug_pack_by_frame = debug.get_pack_by_frame
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local _audio_fetch_input = audio.__fetch_input
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audio.__fetch_input = nil
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local MAX_FETCH = 44100 * 4
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local MAX_AMPLITUDE = 32768
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local total_fetch = Bytearray()
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local max_amplitude = 0.0
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function audio.__reset_fetch_buffer()
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total_fetch:clear()
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max_amplitude = 0.0
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end
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function audio.input.get_max_amplitude()
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return max_amplitude / MAX_AMPLITUDE
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end
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function audio.input.fetch_input(token, size)
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size = size or MAX_FETCH
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if audio_input_tokens_store[token] then
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if #total_fetch >= size then
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return total_fetch:slice(1, size)
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end
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local fetched = _audio_fetch_input(size - #total_fetch)
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if not fetched then
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return
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end
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for i, sample in ipairs(I16view(fetched)) do
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max_amplitude = math.max(math.abs(sample))
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end
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total_fetch:append(fetched)
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return total_fetch:slice()
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end
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error("access denied")
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end
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local GRANT_PERMISSION_MSG = "Grant '%{0}' pack audio recording permission?"
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function audio.input.request_open(callback)
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local token = _base64_encode_urlsafe(_random_bytes(18))
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local caller = _debug_pack_by_frame(1)
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_gui_confirm(gui.str(GRANT_PERMISSION_MSG):gsub("%%{0}", caller), function()
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audio_input_tokens_store[token] = caller
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callback(token)
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menu:reset()
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end)
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end
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function audio.input.__get_core_token()
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local caller = _debug_pack_by_frame(1)
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if caller == "core" then
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return core_token
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end
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end
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