add:使用内部amr降噪的record demo

demo/record/EC7XX/es8311.lua

@@ -0,0 +1,158 @@
+audio.on(0, function(id, event)
+    --使用play来播放文件时只有播放完成回调
+    local succ,stop,file_cnt = audio.getError(0)
+    if not succ then
+        if stop then
+            log.info("用户停止播放")
+        else
+            log.info("第", file_cnt, "个文件解码失败")
+        end
+    end
+    -- log.info("播放完成一个音频")
+    sys.publish("AUDIO_PLAY_DONE")
+end)
+
+local i2c_id = 1
+local i2s_id = 0
+
+-- es8311器件地址
+local es8311_address = 0x18
+local record_cnt = 0
+-- es8311初始化寄存器配置
+local es8311_reg = {
+	{0x45,0x00},
+	{0x01,0x30},
+	{0x02,0x10},
+	{0x02,0x00},
+	{0x03,0x10},
+	{0x16,0x24},
+	{0x04,0x20},
+	{0x05,0x00},
+	{0x06,3},
+	{0x07,0x00},
+	{0x08,0xFF},
+	{0x09,0x0C},
+	{0x0A,0x0C},
+	{0x0B,0x00},
+	{0x0C,0x00},
+	{0x10,0x03},
+	{0x11,0x7F},
+	{0x00,0x80},
+	{0x0D,0x01},
+	{0x01,0x3F},
+	{0x14,0x1a},
+	{0x12,0x28},
+	{0x13,0x00},
+	{0x0E,0x02},
+	{0x0F,0x44},
+	{0x15,0x00},
+	{0x1B,0x0A},
+	{0x1C,0x6A},
+	{0x37,0x48},
+	{0x44,(0 <<7)},
+	{0x17,210},
+	{0x32,200},
+}
+
+-- i2s数据接收buffer
+local rx_buff = zbuff.create(3200)
+
+-- amr数据存放buffer，尽可能地给大一些
+local amr_buff = zbuff.create(20 * 1024)
+--创建一个amr的encoder
+local encoder
+
+-- 录音文件路径
+local recordPath = "/record.amr"
+
+-- i2s数据接收回调
+local function record_cb(id, buff)
+    if buff then
+        log.info("I2S", id, "接收了", rx_buff:used())
+        log.info("编码结果", codec.encode(encoder, rx_buff, amr_buff))		-- 对录音数据进行amr编码，成功的话这个接口会返回true, 默认编码等级为MR475
+		record_cnt = record_cnt + 1
+		if record_cnt >= 25 then	--超过5秒后停止
+			log.info("I2S", "stop") 
+			i2s.stop(i2s_id)	
+		end
+    end
+end
+
+---- MultipartForm上传文件
+-- url string 请求URL地址
+-- filename string 上传服务器的文件名
+-- filePath string 待上传文件的路径
+local function postMultipartFormData(url, filename, filePath)
+    local boundary = "----WebKitFormBoundary"..os.time()
+    local req_headers = {
+        ["Content-Type"] = "multipart/form-data; boundary=" .. boundary,
+    }
+    local body = {}
+    table.insert(body, "--"..boundary.."\r\nContent-Disposition: form-data; name=\"file\"; filename=\"".. filename .."\"\r\n\r\n")
+    table.insert(body, io.readFile(filePath))
+    table.insert(body, "\r\n")
+    table.insert(body, "--"..boundary.."--\r\n")
+    body = table.concat(body)
+    log.info("headers: ", "\r\n" .. json.encode(req_headers), type(body))
+    log.info("body: " .. body:len() .. "\r\n" .. body)
+    local code, headers, body = http.request("POST",url,
+            req_headers,
+            body
+    ).wait()   
+    log.info("http.post", code, headers, body)
+end
+
+
+local function record_task()
+	os.remove(recordPath)
+	audio.config(0, 25, 1, 6, 200)						
+	pm.power(pm.LDO_CTL, true)							-- 打开es8311芯片供电
+	--自适应开发板，自己做的板子不需要2个I2C都用
+	i2c.setup(0, i2c.FAST)
+	i2c.setup(1, i2c.FAST)
+	if i2c.send(0, 0x18, 0xfd) == true then
+		log.info("音频小板", "codec on i2c0")
+	end
+	if i2c.send(1, 0x18, 0xfd) == true then
+		log.info("云喇叭开发板", "codec on i2c1")
+		power_pin = nil
+		i2c_id = 1
+	end
+
+    for i, v in pairs(es8311_reg) do					-- 初始化es8311
+        i2c.send(i2c_id, es8311_address, v, 1)
+    end
+	i2s.setup(i2s_id, 1, 8000, 16, 1, i2s.MODE_LSB)			-- 开启i2s
+    i2s.on(i2s_id, record_cb) 								-- 注册i2s接收回调
+	encoder = codec.create(codec.AMR, false, 7)
+    i2s.recv(i2s_id, rx_buff, 3200)
+	i2c.send(i2c_id, es8311_address, {0x00, 0xc0}, 1)
+    sys.wait(6000)
+    i2c.send(i2c_id, es8311_address, {0x00, 0x80}, 1)			-- ES8311停止录音
+    log.info("录音5秒结束")
+	codec.release(encoder)
+	codec = nil
+	io.writeFile(recordPath, "#!AMR\n")					-- 向文件写入amr文件标识数据
+	io.writeFile(recordPath, amr_buff:query(), "a+b")	-- 向文件写入编码后的amr数据
+	i2s.setup(i2s_id, 0, 0, 0, 0, i2s.MODE_LSB)
+   
+	local result = audio.play(0, {recordPath})			-- 请求音频播放
+	log.info("音频播放结果", result)
+	if result then
+		sys.waitUntil("AUDIO_PLAY_DONE")				-- 等待音频播放完毕
+	else
+														-- 音频播放出错	
+	end
+
+	-- 下面的演示是将音频文件发送到服务器上，如有需要，可以将下面代码注释打开，这里的url是合宙的文件上传测试服务器，上传的文件到http://tools.openluat.com/tools/device-upload-test查看
+	--[[ 
+		local timeTable = os.date("*t", os.time())
+		local nowTime = string.format("%4d%02d%02d_%02d%02d%02d", timeTable.year, timeTable.month, timeTable.day, timeTable.hour, timeTable.min, timeTable.sec)
+		local filename = mobile.imei() .. "_" .. nowTime .. ".amr"
+		postMultipartFormData("http://tools.openluat.com/api/site/device_upload_file", filename, recordPath)
+ 	]]
+	uart.setup(1, 115200)								-- 开启串口1
+    uart.write(1, io.readFile(recordPath))				-- 向串口发送录音文件
+end
+
+sys.taskInit(record_task)

demo/record/EC7XX/main.lua

@@ -0,0 +1,19 @@
+PROJECT = "record_demo"
+VERSION = "1.0.0"
+
+log.info("main", PROJECT, VERSION)
+log.style(1)
+-- sys库是标配
+_G.sys = require("sys")
+_G.sysplus = require("sysplus")
+-- es8311 录音demo
+require "es8311"
+-- es8311 循环录音demo
+-- require "es8311_loop"
+-- es8218e 录音demo
+-- require "es8218e"
+
+-- es7243e 录音demo
+-- require "es7243e"
+
+sys.run()