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webrtc.py
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webrtc.py
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import asyncio
import json
import logging
import threading
import time
from typing import Tuple, Dict, Optional, Set, Union
from av.frame import Frame
from av.packet import Packet
from av import AudioFrame
import fractions
import numpy as np
AUDIO_PTIME = 0.020 # 20ms audio packetization
VIDEO_CLOCK_RATE = 90000
VIDEO_PTIME = 1 / 25 # 30fps
VIDEO_TIME_BASE = fractions.Fraction(1, VIDEO_CLOCK_RATE)
SAMPLE_RATE = 16000
AUDIO_TIME_BASE = fractions.Fraction(1, SAMPLE_RATE)
#from aiortc.contrib.media import MediaPlayer, MediaRelay
#from aiortc.rtcrtpsender import RTCRtpSender
from aiortc import (
MediaStreamTrack,
)
logging.basicConfig()
logger = logging.getLogger(__name__)
class PlayerStreamTrack(MediaStreamTrack):
"""
A video track that returns an animated flag.
"""
def __init__(self, player, kind):
super().__init__() # don't forget this!
self.kind = kind
self._player = player
self._queue = asyncio.Queue()
self.timelist = [] #记录最近包的时间戳
if self.kind == 'video':
self.framecount = 0
self.lasttime = time.perf_counter()
self.totaltime = 0
_start: float
_timestamp: int
async def next_timestamp(self) -> Tuple[int, fractions.Fraction]:
if self.readyState != "live":
raise Exception
if self.kind == 'video':
if hasattr(self, "_timestamp"):
#self._timestamp = (time.time()-self._start) * VIDEO_CLOCK_RATE
self._timestamp += int(VIDEO_PTIME * VIDEO_CLOCK_RATE)
wait = self._start + (self._timestamp / VIDEO_CLOCK_RATE) - time.time()
# wait = self.timelist[0] + len(self.timelist)*VIDEO_PTIME - time.time()
if wait>0:
await asyncio.sleep(wait)
# if len(self.timelist)>=100:
# self.timelist.pop(0)
# self.timelist.append(time.time())
else:
self._start = time.time()
self._timestamp = 0
self.timelist.append(self._start)
print('video start:',self._start)
return self._timestamp, VIDEO_TIME_BASE
else: #audio
if hasattr(self, "_timestamp"):
#self._timestamp = (time.time()-self._start) * SAMPLE_RATE
self._timestamp += int(AUDIO_PTIME * SAMPLE_RATE)
wait = self._start + (self._timestamp / SAMPLE_RATE) - time.time()
# wait = self.timelist[0] + len(self.timelist)*AUDIO_PTIME - time.time()
if wait>0:
await asyncio.sleep(wait)
# if len(self.timelist)>=200:
# self.timelist.pop(0)
# self.timelist.pop(0)
# self.timelist.append(time.time())
else:
self._start = time.time()
self._timestamp = 0
self.timelist.append(self._start)
print('audio start:',self._start)
return self._timestamp, AUDIO_TIME_BASE
async def recv(self) -> Union[Frame, Packet]:
# frame = self.frames[self.counter % 30]
self._player._start(self)
# if self.kind == 'video':
# frame = await self._queue.get()
# else: #audio
# if hasattr(self, "_timestamp"):
# wait = self._start + self._timestamp / SAMPLE_RATE + AUDIO_PTIME - time.time()
# if wait>0:
# await asyncio.sleep(wait)
# if self._queue.qsize()<1:
# #frame = AudioFrame(format='s16', layout='mono', samples=320)
# audio = np.zeros((1, 320), dtype=np.int16)
# frame = AudioFrame.from_ndarray(audio, layout='mono', format='s16')
# frame.sample_rate=16000
# else:
# frame = await self._queue.get()
# else:
# frame = await self._queue.get()
frame = await self._queue.get()
pts, time_base = await self.next_timestamp()
frame.pts = pts
frame.time_base = time_base
if frame is None:
self.stop()
raise Exception
if self.kind == 'video':
self.totaltime += (time.perf_counter() - self.lasttime)
self.framecount += 1
self.lasttime = time.perf_counter()
if self.framecount==100:
print(f"------actual avg final fps:{self.framecount/self.totaltime:.4f}")
self.framecount = 0
self.totaltime=0
return frame
def stop(self):
super().stop()
if self._player is not None:
self._player._stop(self)
self._player = None
def player_worker_thread(
quit_event,
loop,
container,
audio_track,
video_track
):
container.render(quit_event,loop,audio_track,video_track)
class HumanPlayer:
def __init__(
self, nerfreal, format=None, options=None, timeout=None, loop=False, decode=True
):
self.__thread: Optional[threading.Thread] = None
self.__thread_quit: Optional[threading.Event] = None
# examine streams
self.__started: Set[PlayerStreamTrack] = set()
self.__audio: Optional[PlayerStreamTrack] = None
self.__video: Optional[PlayerStreamTrack] = None
self.__audio = PlayerStreamTrack(self, kind="audio")
self.__video = PlayerStreamTrack(self, kind="video")
self.__container = nerfreal
@property
def audio(self) -> MediaStreamTrack:
"""
A :class:`aiortc.MediaStreamTrack` instance if the file contains audio.
"""
return self.__audio
@property
def video(self) -> MediaStreamTrack:
"""
A :class:`aiortc.MediaStreamTrack` instance if the file contains video.
"""
return self.__video
def _start(self, track: PlayerStreamTrack) -> None:
self.__started.add(track)
if self.__thread is None:
self.__log_debug("Starting worker thread")
self.__thread_quit = threading.Event()
self.__thread = threading.Thread(
name="media-player",
target=player_worker_thread,
args=(
self.__thread_quit,
asyncio.get_event_loop(),
self.__container,
self.__audio,
self.__video
),
)
self.__thread.start()
def _stop(self, track: PlayerStreamTrack) -> None:
self.__started.discard(track)
if not self.__started and self.__thread is not None:
self.__log_debug("Stopping worker thread")
self.__thread_quit.set()
self.__thread.join()
self.__thread = None
if not self.__started and self.__container is not None:
#self.__container.close()
self.__container = None
def __log_debug(self, msg: str, *args) -> None:
logger.debug(f"HumanPlayer {msg}", *args)