Added multiple stream types to play from playlist

.gitignore

@@ -1,2 +1,2 @@
 # ignore IDE specific files and folders 
-/.theia/
+.theia/

API_DOC.txt

@@ -18,12 +18,15 @@ API Location					Method		Returns										Redirects to		Description
 /api/v1/playlist/
 ----------------
 /api/v1/playlist/get				GET		JSON object														Returns the whole current playlist
+/api/v1/playlist/create             POST    JSON object                                                     Creates a playlist of the given directory
+/api/v1/playlist/play               POST    JSON object                                                     Plays a playlist from the SD card
 
 /api/v1/volume/
 ----------------
 /api/v1/volume/up					GET		JSON object														Higher the volume (max. 20)
 /api/v1/volume/down					GET		JSON object														Lower the volume (min. 0)
-/api/v1/volume/mute					GET		JSON object														Set volume to 0
+/api/v1/volume/mute					GET		JSON object														Mute (does not affect volume)
+/api/v1/volume/unmute				GET		JSON object														Unmute (set volume to current volume)
 /api/v1/volume/get					GET		JSON object														Do nothing, just get the volume
 /api/v1/volume/<0-20>				GET		JSON object														Set volume to a specific value between 0 and 20
 

README.md

@@ -1,5 +1,11 @@
 # NetSpeaker
 
+[![License: Unlicense](https://img.shields.io/badge/License-Unlicense-blue.svg?style=for-the-badge)](https://unlicense.org/)
+[![Open Source](https://img.shields.io/badge/Open_Source-gray?style=for-the-badge&logo=opensourceinitiative&logoColor=3DA639)](https://opensource.org/)
+[![ESP32](https://img.shields.io/badge/ESP32-FCC624?style=for-the-badge&logo=esphome&logoColor=black)](https://www.espressif.com/en/products/socs/esp32)
+[![State: Unstable](https://img.shields.io/badge/State-Unstable-red.svg?style=for-the-badge)]()
+
+
 NetSpeaker is a project that aims to make it easier to build your own sound system, just like sqeezebox, for example.
 
 There are two operating modes, to adapt to the specific use case - default mode is 0. The mode can be set at compile time
@@ -8,6 +14,13 @@ via the constant operation_mode. Valid choices are:
 - 0: interconnected (HTTP API and WiFi, no buttons); useful for bigger projects
 - 1: standalone (Buttons, no WiFi and HTTP API); useful if you want to build a small player
 
+Any questions? Hopefully a look into the **Wiki** will help.
+
+
+## Audio compatibility
+
+For audio compatibilty, please have a look at [schreibfaul1's git repository's wiki](https://github.com/schreibfaul1/ESP32-audioI2S/wiki#which-external-dacs-can-be-used), where he goes into that in detail.
+
 
 ## Roadmap
 
@@ -22,6 +35,7 @@ Features, already implemented, or still in progress for the v1.0.0 release!
     - [X] /api/v1/playback/pause
     - [X] /api/v1/playback/next
     - [X] /api/v1/playback/previous
+    - [ ] /api/v1/playback/<index>
     - [X] /api/v1/playback/info
     - [ ] /api/v1/playback/id3_image
     - [X] /api/v1/playlist/get
@@ -31,16 +45,25 @@ Features, already implemented, or still in progress for the v1.0.0 release!
     - [X] /api/v1/volume/up
     - [X] /api/v1/volume/down
     - [X] /api/v1/volume/mute
-    - [X] /api/v1/volume/<0-20>
+    - [X] /api/v1/volume/&lt;0-20&gt;
     - [X] /api/v1/settings/restart/
+    - [ ] /api/v1/system/name
+    - [ ] /api/v1/system/info
+    - [ ] /api/v1/system/name
+    - [ ] /api/v1/system/wifi/change
+    - [ ] /api/v1/system/wifi/get_ssid
+    - [ ] /api/v1/files/get
+    - [ ] /api/v1/files/upload
 - [X] Automatic WiFi connection
 - [X] Access Point opened when no WiFi connection could be established
 - [ ] Implement a configuration server running on port 8080
     - [ ] Edit wifi connection
     - [ ] Edit friendly name of the NetSpeaker
+- [X] Improve the volume endpoint handler (currently pretty undynamic - not anymore :)
+- [ ] Add better encoding as umlauts are not shown **sometimes**
 
 
-## Credits
+## Credits & Acknowledgements
 
 Thanks to...
 
@@ -48,6 +71,11 @@ Thanks to...
 - schreibfaul1 (github) for creating the audio library used in this project
 - espressif for making the best microprocessor I've ever seen
 
+External librarys used:
+
+- ESP32-audioI2S library (https://github.com/schreibfaul1/ESP32-audioI2S as of 2023/12)
+- Arduino ESP32-specific librarys (https://github.com/espressif/arduino-esp32/ as of 2023/12)
+
 
 ## Contributing
 
@@ -55,11 +83,10 @@ Pull requests are welcome. For major changes, please open an issue first
 to discuss what you would like to change. 
 Please also make sure to test things carefully before contributing them.
 
+## Mirrors
 
-## External librarys used:
+- [Privacynerd's Gitea (main)](https://git.privacynerd.de/NetSpeaker/NetSpeaker/)
-
+- [Codeberg](https://codeberg.org/NetSpeaker/NetSpeaker)
-- ESP32-audioI2S library (https://github.com/schreibfaul1/ESP32-audioI2S as of 2023/12)
-- Arduino ESP32-specific librarys (https://github.com/espressif/arduino-esp32/ as of 2023/12)
 
 
 ## License

src/NetSpeaker/NetSpeaker.ino

@@ -49,8 +49,9 @@ const String apPSK = "aA16161Aa";                   // pre-shared-key of access
 
 // create all needed variables
 int currentVolume = 20;                                                          // variable where current volume (0...20) is stored
+bool muted = false;                                                              // currently muted (does not affect currentVolume)
 String currentSongPath;                                                          // path to currently playing song
-bool audioPlaying = true;                                                        // play song or not?
+bool audioPlaying = false;                                                       // play song or not?
 Audio audio;                                                                     // Audio object (for playing audio, decoding mp3, ...)
 int currentPlaylistPosition = -1;                                                // the current position in the current playlist
 String currentPlaylist = "/audio/" + directoryPlaylistName + playlistExtension;  // path to current playlist
@@ -65,12 +66,12 @@ struct playbackInfo {
   String resourcePath;  // e.g. /audio/XXX.mp3
   String artist;        // e.g. Blender Foundation
   String track;         // e.g. 01/02 or 01
-  String album;
+  String album;         // album
   String year;          // id3 tag year
   String genre;         // id3 tag content type
   String copyright;     // id3 tag (special)
 };
-struct playbackInfo pbInfo = { "", "", "", "", "", "" };
+struct playbackInfo pbInfo = { "", "", "", "", "", "", "", "", "" };
 
 void setup() {
   Serial.begin(115200);  // setup Serial console (over USB) with baud 115200

src/NetSpeaker/audio.ino

@@ -18,19 +18,28 @@ void setupAudio() {
 }
 
 String nextAudio() {
-  String songPath;
+  String url;
 
   currentPlaylistPosition++;  // increment once
-  songPath = getSongFromPlaylist(currentPlaylist, currentPlaylistPosition);
+  url = getURLFromPlaylist(currentPlaylist, currentPlaylistPosition);
-  if (songPath == "") {            // if the end of the playlist is reached go to start
+
+  if (url == "") {            // if the end of the playlist is reached go to start
     currentPlaylistPosition = -1;  // the next time "nextAudio()" is called it will increment to 0
     nextAudio();                   // recursive call
     return "";                     // exit
   }
-  Serial.printf("[INFO]               Starting next audio from playlist (ID: %d, Path: %s)\n", currentPlaylistPosition, songPath.c_str());
-  audio.connecttoFS(SD, songPath.c_str());  // play the next song
 
-  pbInfo.resourcePath = songPath;
+  if (url.startsWith("http")) {
+    Serial.printf("[INFO]               Starting stream from playlist (ID: %d, URL: %s)\n", currentPlaylistPosition, url.c_str());
+    audio.connecttohost(url.c_str());
+  } else if (url.startsWith("/")) {
+    Serial.printf("[INFO]               Starting audio from playlist (ID: %d, Path: %s)\n", currentPlaylistPosition, url.c_str());
+    audio.connecttoFS(SD, url.c_str());  // play the next song
+  } else if (url.startsWith("speech://")) {  // format: speech://CC@TEXT where CC is the country code, e.g. en or de
+    Serial.printf("[INFO]               Starting speech from playlist (ID: %d, Language: %s, Text: %s)\n", currentPlaylistPosition, url.substring(9, 11).c_str(), url.substring(12).c_str());
+    audio.connecttospeech(url.substring(12).c_str(), url.substring(9, 11).c_str());
+  }
+  pbInfo.resourcePath = url;
   pbInfo.type = "local";
 
   // clear everything (if a file hadn't got id3 tags so that there won't keep the old names)
@@ -43,20 +52,28 @@ String nextAudio() {
   pbInfo.genre = "";
   pbInfo.copyright = "";
 
-  return songPath;
+  return url;
 }
 
 String previousAudio() {
-  String songPath;
+  String url;
 
   currentPlaylistPosition--;
   if (currentPlaylistPosition < 0) currentPlaylistPosition = 0;
 
-  songPath = getSongFromPlaylist(currentPlaylist, currentPlaylistPosition);
+  url = getURLFromPlaylist(currentPlaylist, currentPlaylistPosition);
-  Serial.printf("[INFO]               Starting previous audio from playlist (ID: %d, Path: %s)\n", currentPlaylistPosition, songPath.c_str());
+  if (url.startsWith("http")) {
-  audio.connecttoFS(SD, songPath.c_str());  // play the previous song
+    Serial.printf("[INFO]               Starting stream from playlist (ID: %d, URL: %s)\n", currentPlaylistPosition, url.c_str());
+    audio.connecttohost(url.c_str());
+  } else if (url.startsWith("/")) {
+    Serial.printf("[INFO]               Starting audio from playlist (ID: %d, Path: %s)\n", currentPlaylistPosition, url.c_str());
+    audio.connecttoFS(SD, url.c_str());  // play the next song
+  } else if (url.startsWith("speech://")) {  // format: speech://CC@TEXT where CC is the country code, e.g. en or de
+    Serial.printf("[INFO]               Starting speech from playlist (ID: %d, Language: %s, Text: %s)\n", currentPlaylistPosition, url.substring(9, 11).c_str(), url.substring(12).c_str());
+    audio.connecttospeech(url.substring(12).c_str(), url.substring(9, 11).c_str());
+  }
 
-  pbInfo.resourcePath = songPath;
+  pbInfo.resourcePath = url;
   pbInfo.type = "local";
 
   // clear everything (if a file hadn't got id3 tags so that there won't keep the old names)
@@ -69,7 +86,7 @@ String previousAudio() {
   pbInfo.genre = "";
   pbInfo.copyright = "";
 
-  return songPath;
+  return url;
 }
 
 void switchPlaybackIfButtonClicked() {
@@ -121,9 +138,14 @@ void audio_eof_mp3(const char *info) {  // MUST HAVE THIS NAME (audio_eof_mp3) b
 }
 void audio_eof_speech(const char *info) {
   Serial.printf("[Audio.h] EOF_Speech %s\n", info);
+  nextAudio();
 }
 void audio_info(const char *info) {
   Serial.printf("[Audio.h] Info       %s\n", info);
+
+  if(String(info).startsWith("End of webstream")) {
+    nextAudio();
+  }
 }
 void audio_id3data(const char *info) {  // id3 metadata
   Serial.printf("[Audio.h] ID3Data    %s\n", info);
@@ -164,3 +186,47 @@ void audio_icyurl(const char *info) {  // Name of radio station
 void audio_lasthost(const char *info) {  // stream URL played
   Serial.printf("[Audio.h] Lasthost   %s\n", info);
 }
+
+// *********************************************************************************** //
+// ***************  Code heavily inspired by schreibfaul1's wiki entry  ************** //
+// * https://github.com/schreibfaul1/ESP32-audioI2S/wiki#what-audio-events-are-there * //
+// *********************************************************************************** //
+
+void audio_id3image(File &file, const size_t pos, const size_t size) {  // cover image
+  Serial.printf("[Audio.h] ID3Image   Found at position: %u | Length: %u\n", pos, size);
+  uint8_t buf[1024];
+  file.seek(pos + 1);  // skip 1 byte encoding
+  char mimeType[255];  // mime-type (null terminated)
+  for (uint8_t i = 0u; i < 255; i++) {
+    mimeType[i] = file.read();
+    if (uint8_t(mimeType[i]) == 0) break;
+  }
+  Serial.printf("[Audio.h] ID3Image   MimeType: %s\n", mimeType);
+  uint8_t imageType = file.read();  // image type (1 Byte)
+  Serial.printf("[Audio.h] ID3Image   ImageType: %d\n", imageType);
+  for (uint8_t i = 0u; i < 255; i++) {  // description (null terminated)
+    buf[i] = file.read();
+    if (uint8_t(buf[i]) == 0) break;
+  }
+  // raw image data
+  String imgPath = "/.current";
+  if (String(mimeType) == "image/jpeg") imgPath += ".jpg";
+  else if (String(mimeType) == "image/png") imgPath += ".png";
+  else if (String(mimeType) == "image/svg") imgPath += ".svg";
+  else imgPath += ".img";
+  File coverFile = SD.open(imgPath, FILE_WRITE);
+  size_t len = size;
+  while (len) {
+    uint16_t bytesRead = file.read(buf, sizeof(buf));
+    if (len >= bytesRead) len -= bytesRead;
+    else {
+      bytesRead = len;
+      len = 0;
+    }
+    coverFile.write(buf, bytesRead);
+  }
+  // write changes to SD card
+  coverFile.flush();
+  coverFile.close();
+  Serial.printf("[Audio.h] ID3Image   Cover file written to '%s'\n", imgPath.c_str());
+}

src/NetSpeaker/fs.ino

@@ -95,7 +95,7 @@ bool createPlaylistFromDirectory(String folderpath) {  // create a .m3u playlist
   return true;
 }
 
-String getSongFromPlaylist(String path, int position) {
+String getURLFromPlaylist(String path, int position) {
   String song;
   File playlist;
   char currentChar;

src/NetSpeaker/webserver.ino

@@ -84,10 +84,8 @@ void api_v1_playback_pause() {
 void api_v1_playback_next() {
   Serial.println("[HTTP] [API]         200 - GET '/api/v1/playback/next'");
 
-  String songPath = nextAudio();
+  nextAudio();
-  String content = "\"resource_path\": \"";
+  String content = "\"resource_playlist_index\": ";
-  content += songPath;
-  content += "\", \"resource_playlist_index\": ";
   content += String(currentPlaylistPosition);
 
 
@@ -97,10 +95,8 @@ void api_v1_playback_next() {
 void api_v1_playback_previous() {
   Serial.println("[HTTP] [API]         200 - GET '/api/v1/playback/previous'");
 
-  String songPath = previousAudio();
+  previousAudio();
-  String content = "\"resource_path\": \"";
+  String content = "\"resource_playlist_index\": ";
-  content += songPath;
-  content += "\", \"resource_playlist_index\": ";
   content += String(currentPlaylistPosition);
 
   api_server.send(200, "application/json", generate_api_json(true, content));
@@ -118,7 +114,9 @@ void api_v1_playback_volume() {
     currentVolume--;
     if (currentVolume < 0) currentVolume = 0;
   } else if (option == "mute") {
-    currentVolume = 0;  // TODO: remember the previous volume and just mute it; unmute has to be implemented then
+    muted = true;
+  } else if (option == "unmute") {
+    muted = false;
   } else if (option == "get") {
     // just here that no 'success: false' is sent
   } else if (option == "0") {
@@ -167,9 +165,13 @@ void api_v1_playback_volume() {
     success = false;
   }
 
-  audio.setVolume(currentVolume);   // set volume
+  if (!muted) audio.setVolume(currentVolume);  // set volume if not muted
+  else audio.setVolume(0);                     // if muted, set volume to 0
+
   String content = "\"volume\": ";  // prepare the http response
   content += String(currentVolume);
+  content += ", \"muted\": ";
+  content += muted ? "true" : "false";
   api_server.send(200, "application/json", generate_api_json(success, content));  // generate json and send it
 }
 
@@ -199,7 +201,7 @@ void api_v1_playlist_get() {
   bool firstRun = true;
 
   while (true) {
-    currentSong = getSongFromPlaylist(currentPlaylist, index);
+    currentSong = getURLFromPlaylist(currentPlaylist, index);
     if (currentSong == "") {
       content += "\"";
       break;
@@ -218,6 +220,50 @@ void api_v1_playlist_get() {
   api_server.send(200, "application/json", generate_api_json(true, content));
 }
 
+void api_v1_playlist_create() {
+  Serial.println("[HTTP] [API]         200 - POST '/api/v1/playlist/create'");
+
+  // get the right POST param
+  String folderPath;
+  for (int i = 0; i < api_server.args(); i++) {
+    if (api_server.argName(i) == "folderPath") {
+      folderPath = api_server.arg(i);
+      break;
+    }
+  }
+
+  bool code = createPlaylistFromDirectory(folderPath);
+  if (code) {  // if creating the playlist was successful
+    String playlistPath = folderPath + "/" + directoryPlaylistName + playlistExtension;
+    String content = "\"playlist_path\": \"" + playlistPath + "\"";
+    api_server.send(200, "application/json", generate_api_json(true, content));
+  } else {
+    api_server.send(200, "application/json", generate_api_json(false));
+  }
+}
+
+void api_v1_playlist_play() {
+  Serial.println("[HTTP] [API]         200 - POST '/api/v1/playlist/play'");
+
+  // get the right POST param
+  String playlistPath;
+  for (int i = 0; i < api_server.args(); i++) {
+    if (api_server.argName(i) == "playlistPath") {
+      playlistPath = api_server.arg(i);
+      break;
+    }
+  }
+
+  if (getURLFromPlaylist(playlistPath, 0) == "") {                      // if playlist is empty or nonexistent
+    api_server.send(200, "application/json", generate_api_json(false));  // send no success info
+  } else {
+    currentPlaylist = playlistPath;
+    currentPlaylistPosition = -1;
+    nextAudio();
+    api_server.send(200, "application/json", generate_api_json(true));  // just return the success info
+  }
+}
+
 void api_v1_settings_restart() {
   SD.end();           // delete SD object and sync its cache to flash
   WiFi.disconnect();  // disconnect wifi
@@ -247,15 +293,17 @@ void setupApiWeb() {
     api_server.send(404, "application/json", "{\"code\": 404, \"message\": \"Resource not found.\"}");
   });
   api_server.on("/", apiRoot);
-  api_server.on("/api/v1/playback/toggle", api_v1_playback_toggle);
+  api_server.on("/api/v1/playback/toggle", HTTP_GET, api_v1_playback_toggle);
-  api_server.on("/api/v1/playback/play", api_v1_playback_play);
+  api_server.on("/api/v1/playback/play", HTTP_GET, api_v1_playback_play);
-  api_server.on("/api/v1/playback/pause", api_v1_playback_pause);
+  api_server.on("/api/v1/playback/pause", HTTP_GET, api_v1_playback_pause);
-  api_server.on("/api/v1/playback/next", api_v1_playback_next);
+  api_server.on("/api/v1/playback/next", HTTP_GET, api_v1_playback_next);
-  api_server.on("/api/v1/playback/previous", api_v1_playback_previous);
+  api_server.on("/api/v1/playback/previous", HTTP_GET, api_v1_playback_previous);
-  api_server.on("/api/v1/playback/info", api_v1_playback_info);
+  api_server.on("/api/v1/playback/info", HTTP_GET, api_v1_playback_info);
-  api_server.on("/api/v1/playlist/get", api_v1_playlist_get);
+  api_server.on("/api/v1/playlist/get", HTTP_GET, api_v1_playlist_get);
-  api_server.on(UriBraces("/api/v1/volume/{}"), api_v1_playback_volume);
+  api_server.on("/api/v1/playlist/create", HTTP_POST, api_v1_playlist_create);
-  api_server.on("/api/v1/settings/restart", api_v1_settings_restart);
+  api_server.on("/api/v1/playlist/play", HTTP_POST, api_v1_playlist_play);
+  api_server.on(UriBraces("/api/v1/volume/{}"), HTTP_GET, api_v1_playback_volume);
+  api_server.on("/api/v1/settings/restart", HTTP_GET, api_v1_settings_restart);
 
   Serial.println("[HTTP] [API]         Starting API server (http) on port " + String(webport_api));
   api_server.begin();