1+ #include < WiFi.h>
2+ #include " AudioTools.h"
3+
4+ using namespace audio_tools ;
5+
6+ const char *ssid = " ssid"
7+ const char *password = " password"
8+ WiFiServer server (80 );
9+ WiFiClient client;
10+
11+ const int sample_rate = 10000 ;
12+ const int data_length = 100000 ;
13+ const int channels = 1 ;
14+
15+ SineWaveGenerator<int16_t > sineWave; // subclass of SoundGenerator with max amplitude of 32000
16+ GeneratedSoundStream<int16_t > in (sineWave, channels); // Stream generated from sine wave
17+ StreamCopy copier; // buffered copy
18+ WAVEncoder encoder;
19+ AudioOutputStream wav_stream (encoder); // WAV output stream
20+
21+ void setup ()
22+ {
23+ Serial.begin (115200 );
24+ AudioLogger::instance ().begin (Serial,AudioLogger::Debug);
25+
26+ WiFi.begin (ssid, password);
27+ while (WiFi.status () != WL_CONNECTED)
28+ {
29+ delay (500 );
30+ Serial.print (" ."
31+ }
32+
33+ Serial.println (" "
34+ Serial.println (" WiFi connected."
35+ Serial.println (" IP address: "
36+ Serial.println (WiFi.localIP ());
37+
38+ server.begin ();
39+ sineWave.begin (sample_rate, B4);
40+
41+ in.begin ();
42+ }
43+
44+
45+ void processClient () {
46+ if (client) { // if you get a client,
47+ Serial.println (" New Client." // print a message out the serial port
48+ String currentLine = " " // make a String to hold incoming data from the client
49+ while (client.connected ()) { // loop while the client's connected
50+ if (client.available ()) { // if there's bytes to read from the client,
51+ char c = client.read (); // read a byte, then
52+ Serial.write (c); // print it out the serial monitor
53+ if (c == ' \n ' // if the byte is a newline character
54+
55+ // if the current line is blank, you got two newline characters in a row.
56+ // that's the end of the client HTTP request, so send a response:
57+ if (currentLine.length () == 0 ){
58+ // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
59+ // and a content-type so the client knows what's coming, then a blank line:
60+ client.println (" HTTP/1.1 200 OK"
61+ client.println (" Content-type:audio/wav"
62+ client.println ();
63+
64+ // set up wav encoder
65+ auto config = encoder.defaultConfig ();
66+ config.channels = channels;
67+ config.sample_rate = sample_rate;
68+ // config.data_length = data_length;
69+ config.is_streamed = true ;
70+ encoder.begin (client, config);
71+
72+ Serial.println (" Returning WAV stream..."
73+ copier.begin (wav_stream, in);
74+ // break out of the while loop:
75+ break ;
76+ } else { // if you got a newline, then clear currentLine:
77+ currentLine = " "
78+ }
79+ }
80+ else if (c != ' \r '
81+ { // if you got anything else but a carriage return character,
82+ currentLine += c; // add it to the end of the currentLine
83+ }
84+ }
85+ }
86+ }
87+ }
88+
89+ void loop () {
90+ if (!client.connected ()) {
91+ client = server.available (); // listen for incoming clients
92+ processClient ();
93+ } else {
94+ // We are connected: copy input from source to wav output
95+ if (encoder){
96+ copier.copy ();
97+ if (!encoder) {
98+ Serial.println (" stop client..."
99+ client.stop ();
100+ }
101+ }
102+ }
103+ }
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