Merge pull request #36 from UniversityRadioYork/mstratford/linux-audio

Linux updates for Studio1PC

.gitignore

@@ -25,3 +25,5 @@ music-tmp/
 
 
 presenter-build
+
+node_modules/

build/build-linux.sh

@@ -7,7 +7,7 @@ build_branch="$(git branch --show-current)"
 echo "BUILD: str = \"$build_commit\"" > ../build.py
 echo "BRANCH: str = \"$build_branch\"" >> ../build.py
 
-apt install libportaudio2
+sudo apt install libportaudio2
 
 python3 -m venv ../venv
 source ../venv/bin/activate
@@ -19,6 +19,8 @@ pip3 install -e ../
 
 python3 ./generate-build-exe-config.py
 
+chmod +x output/BAPSicle
+
 python3 ./build-exe.py
 
 bash ./build-exe-pyinstaller-command.sh

build/requirements.txt

@@ -1,5 +1,5 @@
 wheel
-pygame==2.0.1
+pygame==2.0.2
 sanic==21.3.4
 sanic-Cors==1.0.0
 syncer==1.3.0

dev/scripts/get_linux_outputs.py

@@ -0,0 +1,24 @@
+import os
+
+os.environ["PYGAME_HIDE_SUPPORT_PROMPT"] = "hide"
+os.putenv('SDL_AUDIODRIVER', 'pulseaudio')
+import pygame._sdl2 as sdl2
+import pygame
+from pygame import mixer
+pygame.init()
+import time
+mixer.init(44100, -16, 2, 1024)
+is_capture = 0  # zero to request playback devices, non-zero to request recording devices
+num = sdl2.get_num_audio_devices(is_capture)
+names = [str(sdl2.get_audio_device_name(i, is_capture), encoding="utf-8") for i in range(num)]
+mixer.quit()
+for i in names:
+    print(i)
+    mixer.init(44100, -16, 2, 1024, devicename=i)
+    print(mixer.get_init())
+    mixer.music.load("/home/mstratford/Downloads/managed_play.mp3")
+    mixer.music.play()
+    # my_song = mixer.Sound("/home/mstratford/Downloads/managed_play.mp3")
+    # my_song.play()
+    time.sleep(5)
+    pygame.quit()

helpers/device_manager.py

@@ -1,6 +1,13 @@
 from typing import Any, Dict, List, Optional, Tuple
 import sounddevice as sd
 from helpers.os_environment import isLinux, isMacOS, isWindows
+import os
+
+os.environ["PYGAME_HIDE_SUPPORT_PROMPT"] = "hide"
+if isLinux():
+    os.putenv('SDL_AUDIODRIVER', 'pulseaudio')
+import pygame._sdl2 as sdl2
+from pygame import mixer
 import glob
 
 if isWindows():
@@ -20,10 +27,10 @@ class DeviceManager:
         return host_api
 
     @classmethod
-    def _getAudioDevices(cls) -> sd.DeviceList:
+    def _getSDAudioDevices(cls):
         # To update the list of devices
-        # Sadly this doesn't work on MacOS.
+        # Sadly this only works on Windows. Linux hangs, MacOS crashes.
-        if not isMacOS():
+        if isWindows():
             sd._terminate()
             sd._initialize()
         devices: sd.DeviceList = sd.query_devices()
@@ -31,11 +38,13 @@ class DeviceManager:
 
     @classmethod
     def getAudioOutputs(cls) -> Tuple[List[Dict]]:
-        host_apis = sd.query_hostapis()
+
-        devices: sd.DeviceList = cls._getAudioDevices()
+        host_apis = list(sd.query_hostapis())
+        devices: sd.DeviceList = cls._getSDAudioDevices()
 
         for host_api_id in range(len(host_apis)):
-            if isWindows() and host_apis[host_api_id]["name"] not in WINDOWS_APIS:
+            # Linux SDL uses PortAudio, which SoundDevice doesn't find. So mark all as unsable.
+            if (isWindows() and host_apis[host_api_id]["name"] not in WINDOWS_APIS) or (isLinux()):
                 host_apis[host_api_id]["usable"] = False
             else:
                 host_apis[host_api_id]["usable"] = True
@@ -51,6 +60,15 @@ class DeviceManager:
 
         return host_apis
 
+    @classmethod
+    def getAudioDevices(cls) -> List[str]:
+        mixer.init(44100, -16, 2, 1024)
+        is_capture = 0  # zero to request playback devices, non-zero to request recording devices
+        num = sdl2.get_num_audio_devices(is_capture)
+        names = [str(sdl2.get_audio_device_name(i, is_capture), encoding="utf-8") for i in range(num)]
+        mixer.quit()
+        return names
+
     @classmethod
     def getSerialPorts(cls) -> List[Optional[str]]:
         """Lists serial port names

package-lock.json

@@ -1,5 +1,13 @@
 {
   "name": "bapsicle",
-  "version": "3.0.0",
+  "version": "3.1.0",
-  "lockfileVersion": 1
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "yarn": {
+      "version": "1.22.15",
+      "resolved": "https://registry.npmjs.org/yarn/-/yarn-1.22.15.tgz",
+      "integrity": "sha512-AzoEDxj256BOS/jqDXA3pjyhmi4FRBBUMgYoTHI4EIt2EhREkvH0soPVEtnD+DQIJfU5R9bKhcZ1H9l8zPWeoA=="
+    }
+  }
 }

package.json

@@ -24,5 +24,8 @@
   "bugs": {
     "url": "https://github.com/universityradioyork/bapsicle/issues"
   },
-  "homepage": "https://github.com/universityradioyork/bapsicle#readme"
+  "homepage": "https://github.com/universityradioyork/bapsicle#readme",
+  "dependencies": {
+    "yarn": "^1.22.15"
+  }
 }

player.py

@@ -21,8 +21,11 @@
 
 # Stop the Pygame Hello message.
 import os
-
 os.environ["PYGAME_HIDE_SUPPORT_PROMPT"] = "hide"
+from helpers.os_environment import isLinux
+# It's the only one we could get to work.
+if isLinux():
+    os.putenv('SDL_AUDIODRIVER', 'pulseaudio')
 
 from queue import Empty
 import multiprocessing

server.py

@@ -23,7 +23,7 @@ import json
 from setproctitle import setproctitle
 import psutil
 
-from helpers.os_environment import isMacOS
+from helpers.os_environment import isLinux, isMacOS
 
 if not isMacOS():
     # Rip, this doesn't like threading on MacOS.
@@ -206,7 +206,9 @@ class BAPSicleServer:
             time.sleep(1)
 
     def startServer(self):
-        if isMacOS():
+        # On MacOS, the default causes something to keep creating new processes.
+        # On Linux, this is needed to make pulseaudio initiate properly.
+        if isMacOS() or isLinux():
             multiprocessing.set_start_method("spawn", True)
 
         process_title = "startServer"

ui-templates/config_player.html

@@ -33,6 +33,26 @@ Set for:
 Default Audio Output
 </code>
 </p>
+{% if data.sdl_direct %}
+Linux (Pulse Audio)
+<br>
+<code>
+{% for output in data.outputs %}
+Set for:
+  {% for channel in data.channels %}
+    {% if not channel %}
+    Player {{loop.index0}}
+    {% elif channel.output == output %}
+    <strong>Player {{channel.channel}}</strong>
+    {% else %}
+    <a href="/player/{{channel.channel}}/output/{{output}}">Player {{channel.channel}}</a>
+    {% endif %}
+    /
+  {% endfor %}
+{% if output %}{{output}}{% else %}System Default Output{% endif %}<br>
+{% endfor %}
+</code>
+{% else %}
 {% for host_api in data.outputs %}
   {{host_api.name}}
   <br>
@@ -54,4 +74,5 @@ Default Audio Output
   {% endfor %}
   </code>
 {% endfor %}
+{% endif %}
 {% endblock %}

web_server.py

@@ -17,6 +17,7 @@ import json
 import os
 
 from helpers.os_environment import (
+    isLinux,
     resolve_external_file_path,
     resolve_local_file_path,
 )
@@ -171,11 +172,16 @@ def ui_config_player(request):
     for i in range(server_state.get()["num_channels"]):
         channel_states.append(status(i))
 
-    outputs = DeviceManager.getAudioOutputs()
+    outputs = None
+    if isLinux():
+        outputs = DeviceManager.getAudioDevices()
+    else:
+        outputs = DeviceManager.getAudioOutputs()
 
     data = {
         "channels": channel_states,
         "outputs": outputs,
+        "sdl_direct": isLinux(),
         "ui_page": "config",
         "ui_title": "Player Config",
     }
@@ -545,9 +551,12 @@ def WebServer(player_to: List[Queue], player_from: List[Queue], state: StateMana
             )
         except Exception:
             break
-    loop = asyncio.get_event_loop()
+    try:
-    if loop:
+        loop = asyncio.get_event_loop()
-        loop.close()
+        if loop:
-    if app:
+            loop.close()
-        app.stop()
+        if app:
-        del app
+            app.stop()
+            del app
+    except Exception:
+        pass