player.py 文件源码

def read(self, frame_size):
        self.frame_count += 1

        frame = self.buff.read(frame_size)

        if self.volume != 1:
            frame = self._frame_vol(frame, self.volume, maxv=2)

        if self.draw and not self.frame_count % self.frame_skip:
            # these should be processed for every frame, but "overhead"
            rms = audioop.rms(frame, 2)
            self.rmss.append(rms)

            max_rms = sorted(self.rmss)[-1]
            meter_text = 'avg rms: {:.2f}, max rms: {:.2f} '.format(self._avg(self.rmss), max_rms)
            self._pprint_meter(rms / max(1, max_rms), text=meter_text, shift=True)

        return frame