You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
81 lines
3.0 KiB
81 lines
3.0 KiB
#!/usr/bin/env python3 |
|
# |
|
# Copyright (C) 2019 Axel Gembe <derago@gmail.com> |
|
# Copyright (c) 2024 The Electrum developers |
|
# |
|
# Permission is hereby granted, free of charge, to any person |
|
# obtaining a copy of this software and associated documentation files |
|
# (the "Software"), to deal in the Software without restriction, |
|
# including without limitation the rights to use, copy, modify, merge, |
|
# publish, distribute, sublicense, and/or sell copies of the Software, |
|
# and to permit persons to whom the Software is furnished to do so, |
|
# subject to the following conditions: |
|
# |
|
# The above copyright notice and this permission notice shall be |
|
# included in all copies or substantial portions of the Software. |
|
# |
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
|
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
|
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
|
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
|
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
|
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
|
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
|
# SOFTWARE. |
|
|
|
from typing import List |
|
|
|
from PyQt6.QtMultimedia import (QVideoFrame, QVideoFrameFormat, QVideoSink) |
|
from PyQt6.QtGui import QImage |
|
from PyQt6.QtCore import QObject, pyqtSignal |
|
|
|
from electrum.i18n import _ |
|
from electrum.logging import get_logger |
|
|
|
|
|
_logger = get_logger(__name__) |
|
|
|
|
|
class QrReaderVideoSurface(QVideoSink): |
|
""" |
|
Receives QVideoFrames from QCamera, converts them into a QImage, flips the X and Y axis if |
|
necessary and sends them to listeners via the frame_available event. |
|
""" |
|
|
|
def __init__(self, parent: QObject = None): |
|
super().__init__(parent) |
|
self.videoFrameChanged.connect(self._on_new_frame) |
|
|
|
def _on_new_frame(self, frame: QVideoFrame) -> None: |
|
if not frame.isValid(): |
|
return |
|
|
|
image_format = QVideoFrameFormat.imageFormatFromPixelFormat(frame.pixelFormat()) |
|
if image_format == QVideoFrameFormat.PixelFormat.Format_Invalid: |
|
_logger.info(_('QR code scanner for video frame with invalid pixel format')) |
|
return |
|
|
|
if not frame.map(QVideoFrame.MapMode.ReadOnly): |
|
_logger.info(_('QR code scanner failed to map video frame')) |
|
return |
|
|
|
try: |
|
img = frame.toImage() |
|
|
|
# Check whether we need to flip the image on any axis |
|
surface_format = frame.surfaceFormat() |
|
flip_x = surface_format.isMirrored() |
|
flip_y = surface_format.scanLineDirection() == QVideoFrameFormat.Direction.BottomToTop |
|
|
|
# Mirror the image if needed |
|
if flip_x or flip_y: |
|
img = img.mirrored(flip_x, flip_y) |
|
|
|
# Create a copy of the image so the original frame data can be freed |
|
img = img.copy() |
|
finally: |
|
frame.unmap() |
|
|
|
self.frame_available.emit(img) |
|
|
|
frame_available = pyqtSignal(QImage)
|
|
|