anki/qt/aqt/sound.py

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2019-02-05 04:59:03 +01:00
# Copyright: Ankitects Pty Ltd and contributors
# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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import atexit
import os
import subprocess
import sys
import threading
import time
import wave
from abc import ABC, abstractmethod
from concurrent.futures import Future
from typing import Any, Callable, Dict, List, Optional, Tuple
import pyaudio
import anki
import aqt
from anki.lang import _
from anki.sound import AVTag, SoundOrVideoTag
from anki.utils import isLin, isMac, isWin
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from aqt import gui_hooks
from aqt.mpv import MPV, MPVBase
from aqt.qt import *
from aqt.taskman import TaskManager
from aqt.utils import restoreGeom, saveGeom
# AV player protocol
##########################################################################
OnDoneCallback = Callable[[], None]
class Player(ABC):
@abstractmethod
def play(self, tag: AVTag, on_done: OnDoneCallback) -> None:
pass
@abstractmethod
def rank_for_tag(self, tag: AVTag) -> Optional[int]:
"""How suited this player is to playing tag.
AVPlayer will choose the player that returns the highest rank
for a given tag.
If None, this player can not play the tag.
"""
def stop(self) -> None:
"""Optional.
If implemented, the player must not call on_done() when the audio is stopped."""
def seek_relative(self, secs: int) -> None:
"Jump forward or back by secs. Optional."
def toggle_pause(self) -> None:
"Optional."
def shutdown(self) -> None:
"Do any cleanup required at program termination. Optional."
class SoundOrVideoPlayer(Player): # pylint: disable=abstract-method
default_rank = 0
def rank_for_tag(self, tag: AVTag) -> Optional[int]:
if isinstance(tag, SoundOrVideoTag):
return self.default_rank
else:
return None
# Main playing interface
##########################################################################
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class AVPlayer:
players: List[Player] = []
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# when a new batch of audio is played, shoud the currently playing
# audio be stopped?
interrupt_current_audio = True
def __init__(self):
self._enqueued: List[AVTag] = []
self.current_player: Optional[Player] = None
def play_tags(self, tags: List[AVTag]) -> None:
"""Clear the existing queue, then start playing provided tags."""
self._enqueued = tags
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if self.interrupt_current_audio:
self._stop_if_playing()
self._play_next_if_idle()
def extend_and_play(self, tags: List[AVTag]) -> None:
"""Add extra tags to queue, without clearing it."""
self._enqueued.extend(tags)
self._play_next_if_idle()
def play_from_text(self, col: anki.storage._Collection, text: str) -> None:
tags = col.backend.get_av_tags(text)
self.play_tags(tags)
def extend_from_text(self, col: anki.storage._Collection, text: str) -> None:
tags = col.backend.get_av_tags(text)
self.extend_and_play(tags)
def stop_and_clear_queue(self) -> None:
self._enqueued = []
self._stop_if_playing()
def play_file(self, filename: str) -> None:
self.play_tags([SoundOrVideoTag(filename=filename)])
def toggle_pause(self):
if self.current_player:
self.current_player.toggle_pause()
def seek_relative(self, secs: int) -> None:
if self.current_player:
self.current_player.seek_relative(secs)
def shutdown(self) -> None:
self.stop_and_clear_queue()
for player in self.players:
player.shutdown()
def _stop_if_playing(self) -> None:
if self.current_player:
self.current_player.stop()
self.current_player = None
def _pop_next(self) -> Optional[AVTag]:
if not self._enqueued:
return None
return self._enqueued.pop(0)
def _on_play_finished(self) -> None:
self.current_player = None
gui_hooks.av_player_did_play()
self._play_next_if_idle()
def _play_next_if_idle(self) -> None:
if self.current_player:
return
next = self._pop_next()
if next is not None:
self._play(next)
def _play(self, tag: AVTag) -> None:
best_player = self._best_player_for_tag(tag)
if best_player:
self.current_player = best_player
gui_hooks.av_player_will_play(tag)
self.current_player.play(tag, self._on_play_finished)
else:
print("no players found for", tag)
def _best_player_for_tag(self, tag: AVTag) -> Optional[Player]:
ranked = []
for p in self.players:
rank = p.rank_for_tag(tag)
if rank is not None:
ranked.append((rank, p))
ranked.sort()
if ranked:
return ranked[-1][1]
else:
return None
av_player = AVPlayer()
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# Packaged commands
##########################################################################
# return modified command array that points to bundled command, and return
# required environment
def _packagedCmd(cmd) -> Tuple[Any, Dict[str, str]]:
cmd = cmd[:]
env = os.environ.copy()
if "LD_LIBRARY_PATH" in env:
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del env["LD_LIBRARY_PATH"]
if isMac:
dir = os.path.dirname(os.path.abspath(__file__))
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exeDir = os.path.abspath(dir + "/../../Resources/audio")
else:
exeDir = os.path.dirname(os.path.abspath(sys.argv[0]))
if isWin and not cmd[0].endswith(".exe"):
cmd[0] += ".exe"
path = os.path.join(exeDir, cmd[0])
if not os.path.exists(path):
return cmd, env
cmd[0] = path
return cmd, env
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# Simple player implementations
##########################################################################
class PlayerInterrupted(Exception):
pass
class SimpleProcessPlayer(Player): # pylint: disable=abstract-method
"A player that invokes a new process for each tag to play."
args: List[str] = []
env: Optional[Dict[str, str]] = None
def __init__(self, taskman: TaskManager):
self._taskman = taskman
self._terminate_flag = False
self._process: Optional[subprocess.Popen] = None
def play(self, tag: AVTag, on_done: OnDoneCallback) -> None:
self._taskman.run(
lambda: self._play(tag), lambda res: self._on_done(res, on_done)
)
def stop(self):
self._terminate_flag = True
# block until stopped
t = time.time()
while self._terminate_flag and time.time() - t < 10:
time.sleep(0.1)
def _play(self, tag: AVTag) -> None:
assert isinstance(tag, SoundOrVideoTag)
self._process = subprocess.Popen(self.args + [tag.filename], env=self.env)
self._wait_for_termination()
def _wait_for_termination(self):
try:
while True:
try:
self._process.wait(0.1)
if self._process.returncode != 0:
print(f"player got return code: {self._process.returncode}")
return
except subprocess.TimeoutExpired:
pass
if self._terminate_flag:
self._process.terminate()
raise PlayerInterrupted()
finally:
self._process = None
self._terminate_flag = False
def _on_done(self, ret: Future, cb: OnDoneCallback) -> None:
try:
ret.result()
except PlayerInterrupted:
# don't fire done callback when interrupted
return
cb()
class SimpleMpvPlayer(SimpleProcessPlayer, SoundOrVideoPlayer):
args, env = _packagedCmd(
[
"mpv",
"--no-terminal",
"--force-window=no",
"--ontop",
"--audio-display=no",
"--keep-open=no",
"--input-media-keys=no",
"--no-config",
]
)
def __init__(self, taskman: TaskManager, base_folder: str) -> None:
super().__init__(taskman)
conf_path = os.path.join(base_folder, "mpv.conf")
self.args += ["--no-config", "--include=" + conf_path]
class SimpleMplayerPlayer(SimpleProcessPlayer, SoundOrVideoPlayer):
args, env = _packagedCmd(["mplayer", "-really-quiet", "-noautosub"])
if isWin:
args += ["-ao", "win32"]
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# Platform hacks
##########################################################################
# don't show box on windows
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si: Optional[Any]
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if sys.platform == "win32":
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si = subprocess.STARTUPINFO() # pytype: disable=module-attr
try:
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si.dwFlags |= subprocess.STARTF_USESHOWWINDOW # pytype: disable=module-attr
except:
# pylint: disable=no-member
# python2.7+
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si.dwFlags |= (
subprocess._subprocess.STARTF_USESHOWWINDOW
) # pytype: disable=module-attr
else:
si = None
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# osx throws interrupted system call errors frequently
def retryWait(proc) -> Any:
while 1:
try:
return proc.wait()
except OSError:
continue
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# MPV
##########################################################################
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class MpvManager(MPV, SoundOrVideoPlayer):
if not isLin:
default_argv = MPVBase.default_argv + [
"--input-media-keys=no",
]
def __init__(self, base_path: str) -> None:
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super().__init__(window_id=None, debug=False)
mpvPath, self.popenEnv = _packagedCmd(["mpv"])
self.executable = mpvPath[0]
self._on_done: Optional[OnDoneCallback] = None
conf_path = os.path.join(base_path, "mpv.conf")
self.default_argv += ["--no-config", "--include=" + conf_path]
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def play(self, tag: AVTag, on_done: OnDoneCallback) -> None:
assert isinstance(tag, SoundOrVideoTag)
self._on_done = on_done
path = os.path.join(os.getcwd(), tag.filename)
self.command("loadfile", path, "append-play")
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def stop(self) -> None:
self.command("stop")
def toggle_pause(self) -> None:
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self.set_property("pause", not self.get_property("pause"))
def seek_relative(self, secs) -> None:
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self.command("seek", secs, "relative")
def on_idle(self) -> None:
if self._on_done:
self._on_done()
def shutdown(self) -> None:
self.close()
# Legacy, not used
##################################################
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togglePause = toggle_pause
seekRelative = seek_relative
def queueFile(self, file: str) -> None:
return
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def clearQueue(self) -> None:
return
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# Mplayer in slave mode
##########################################################################
class SimpleMplayerSlaveModePlayer(SimpleMplayerPlayer):
def __init__(self, taskman: TaskManager):
super().__init__(taskman)
self.args.append("-slave")
def _play(self, tag: AVTag) -> None:
assert isinstance(tag, SoundOrVideoTag)
self._process = subprocess.Popen(
self.args + [tag.filename], env=self.env, stdin=subprocess.PIPE
)
self._wait_for_termination()
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def command(self, text: str) -> None:
"""Send a command over the slave interface.
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The trailing newline is automatically added."""
self._process.stdin.write(text.encode("utf8") + b"\n")
self._process.stdin.flush()
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def seek_relative(self, secs: int) -> None:
self.command(f"seek {secs} 0")
def toggle_pause(self):
self.command("pause")
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# PyAudio recording
##########################################################################
PYAU_FORMAT = pyaudio.paInt16
PYAU_CHANNELS = 1
PYAU_INPUT_INDEX: Optional[int] = None
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processingSrc = "rec.wav"
processingDst = "rec.mp3"
recFiles: List[str] = []
processingChain: List[List[str]] = [
["lame", processingSrc, processingDst, "--noreplaygain", "--quiet"],
]
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class _Recorder:
def postprocess(self, encode=True) -> None:
self.encode = encode
for c in processingChain:
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# print c
if not self.encode and c[0] == "lame":
continue
try:
cmd, env = _packagedCmd(c)
ret = retryWait(subprocess.Popen(cmd, startupinfo=si, env=env))
except:
ret = True
finally:
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self.cleanup()
if ret:
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raise Exception(_("Error running %s") % " ".join(cmd))
def cleanup(self) -> None:
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if os.path.exists(processingSrc):
os.unlink(processingSrc)
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class PyAudioThreadedRecorder(threading.Thread):
def __init__(self, startupDelay) -> None:
threading.Thread.__init__(self)
self.startupDelay = startupDelay
self.finish = False
def run(self) -> Any:
chunk = 1024
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p = pyaudio.PyAudio()
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rate = int(p.get_default_input_device_info()["defaultSampleRate"])
wait = int(rate * self.startupDelay)
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stream = p.open(
format=PYAU_FORMAT,
channels=PYAU_CHANNELS,
rate=rate,
input=True,
input_device_index=PYAU_INPUT_INDEX,
frames_per_buffer=chunk,
)
stream.read(wait)
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data = b""
while not self.finish:
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data += stream.read(chunk, exception_on_overflow=False)
stream.close()
p.terminate()
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wf = wave.open(processingSrc, "wb")
wf.setnchannels(PYAU_CHANNELS)
wf.setsampwidth(p.get_sample_size(PYAU_FORMAT))
wf.setframerate(rate)
wf.writeframes(data)
wf.close()
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class PyAudioRecorder(_Recorder):
# discard first 250ms which may have pops/cracks
startupDelay = 0.25
def __init__(self):
for t in recFiles + [processingSrc, processingDst]:
try:
os.unlink(t)
except OSError:
pass
self.encode = False
def start(self):
self.thread = PyAudioThreadedRecorder(startupDelay=self.startupDelay)
self.thread.start()
def stop(self):
self.thread.finish = True
self.thread.join()
def file(self):
if self.encode:
tgt = "rec%d.mp3" % time.time()
os.rename(processingDst, tgt)
return tgt
else:
return processingSrc
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Recorder = PyAudioRecorder
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# Recording dialog
##########################################################################
def getAudio(parent, encode=True):
"Record and return filename"
# record first
r = Recorder()
mb = QMessageBox(parent)
restoreGeom(mb, "audioRecorder")
mb.setWindowTitle("Anki")
mb.setIconPixmap(QPixmap(":/icons/media-record.png"))
but = QPushButton(_("Save"))
mb.addButton(but, QMessageBox.AcceptRole)
but.setDefault(True)
but = QPushButton(_("Cancel"))
mb.addButton(but, QMessageBox.RejectRole)
mb.setEscapeButton(but)
t = time.time()
r.start()
time.sleep(r.startupDelay)
QApplication.instance().processEvents()
while not mb.clickedButton():
txt = _("Recording...<br>Time: %0.1f")
mb.setText(txt % (time.time() - t))
mb.show()
QApplication.instance().processEvents()
if mb.clickedButton() == mb.escapeButton():
r.stop()
r.cleanup()
return
saveGeom(mb, "audioRecorder")
# ensure at least a second captured
while time.time() - t < 1:
time.sleep(0.1)
r.stop()
# process
r.postprocess(encode)
return r.file()
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# Legacy audio interface
##########################################################################
# these will be removed in the future
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def clearAudioQueue() -> None:
av_player.stop_and_clear_queue()
def play(filename: str) -> None:
av_player.play_file(filename)
def playFromText(text) -> None:
from aqt import mw
av_player.extend_from_text(mw.col, text)
# legacy globals
_player = play
_queueEraser = clearAudioQueue
mpvManager: Optional["MpvManager"] = None
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# add everything from this module into anki.sound for backwards compat
_exports = [i for i in locals().items() if not i[0].startswith("__")]
for (k, v) in _exports:
sys.modules["anki.sound"].__dict__[k] = v
# Init defaults
##########################################################################
def setup_audio(taskman: TaskManager, base_folder: str) -> None:
# legacy global var
global mpvManager
if not isWin:
try:
mpvManager = MpvManager(base_folder)
except FileNotFoundError:
print("mpv not found, reverting to mplayer")
except aqt.mpv.MPVProcessError:
print("mpv too old, reverting to mplayer")
if mpvManager is not None:
av_player.players.append(mpvManager)
else:
mplayer = SimpleMplayerSlaveModePlayer(taskman)
av_player.players.append(mplayer)
# currently unused
# mpv = SimpleMpvPlayer(base_folder)
# av_player.players.append(mpv)
# tts support
if isMac:
from aqt.tts import MacTTSPlayer
av_player.players.append(MacTTSPlayer(taskman))
atexit.register(av_player.shutdown)