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# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2022, Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
from helpers import mfb_to_rgb
from PyQt5 import QtCore, QtGui, QtWidgets
import libcamera as libcam
import libcamera.utils
import sys
# Loading MJPEG to a QPixmap produces corrupt JPEG data warnings. Ignore these.
def qt_message_handler(msg_type, msg_log_context, msg_string):
if msg_string.startswith("Corrupt JPEG data"):
return
# For some reason qInstallMessageHandler returns None, so we won't
# call the old handler
if old_msg_handler is not None:
old_msg_handler(msg_type, msg_log_context, msg_string)
else:
print(msg_string)
old_msg_handler = QtCore.qInstallMessageHandler(qt_message_handler)
def rgb_to_pix(rgb):
w = rgb.shape[1]
h = rgb.shape[0]
qim = QtGui.QImage(rgb, w, h, QtGui.QImage.Format.Format_RGB888)
pix = QtGui.QPixmap.fromImage(qim)
return pix
class QtRenderer:
def __init__(self, state):
self.state = state
self.cm = state.cm
self.contexts = state.contexts
def setup(self):
self.app = QtWidgets.QApplication([])
windows = []
for ctx in self.contexts:
for stream in ctx.streams:
window = MainWindow(ctx, stream)
window.show()
windows.append(window)
self.windows = windows
buf_mmap_map = {}
for ctx in self.contexts:
for stream in ctx.streams:
for buf in ctx.allocator.buffers(stream):
mfb = libcamera.utils.MappedFrameBuffer(buf).mmap()
buf_mmap_map[buf] = mfb
self.buf_mmap_map = buf_mmap_map
def run(self):
camnotif = QtCore.QSocketNotifier(self.cm.event_fd, QtCore.QSocketNotifier.Read)
camnotif.activated.connect(lambda _: self.readcam())
keynotif = QtCore.QSocketNotifier(sys.stdin.fileno(), QtCore.QSocketNotifier.Read)
keynotif.activated.connect(lambda _: self.readkey())
print('Capturing...')
self.app.exec()
print('Exiting...')
def readcam(self):
running = self.state.event_handler()
if not running:
self.app.quit()
def readkey(self):
sys.stdin.readline()
self.app.quit()
def request_handler(self, ctx, req):
buffers = req.buffers
for stream, fb in buffers.items():
wnd = next(wnd for wnd in self.windows if wnd.stream == stream)
mfb = self.buf_mmap_map[fb]
wnd.handle_request(stream, mfb)
self.state.request_processed(ctx, req)
def cleanup(self):
for w in self.windows:
w.close()
class MainWindow(QtWidgets.QWidget):
def __init__(self, ctx, stream):
super().__init__()
self.ctx = ctx
self.stream = stream
self.label = QtWidgets.QLabel()
windowLayout = QtWidgets.QHBoxLayout()
self.setLayout(windowLayout)
windowLayout.addWidget(self.label)
controlsLayout = QtWidgets.QVBoxLayout()
windowLayout.addLayout(controlsLayout)
windowLayout.addStretch()
group = QtWidgets.QGroupBox('Info')
groupLayout = QtWidgets.QVBoxLayout()
group.setLayout(groupLayout)
controlsLayout.addWidget(group)
lab = QtWidgets.QLabel(ctx.id)
groupLayout.addWidget(lab)
self.frameLabel = QtWidgets.QLabel()
groupLayout.addWidget(self.frameLabel)
group = QtWidgets.QGroupBox('Properties')
groupLayout = QtWidgets.QVBoxLayout()
group.setLayout(groupLayout)
controlsLayout.addWidget(group)
camera = ctx.camera
for cid, cv in camera.properties.items():
lab = QtWidgets.QLabel()
lab.setText('{} = {}'.format(cid, cv))
groupLayout.addWidget(lab)
group = QtWidgets.QGroupBox('Controls')
groupLayout = QtWidgets.QVBoxLayout()
group.setLayout(groupLayout)
controlsLayout.addWidget(group)
for cid, cinfo in camera.controls.items():
lab = QtWidgets.QLabel()
lab.setText('{} = {}/{}/{}'
.format(cid, cinfo.min, cinfo.max, cinfo.default))
groupLayout.addWidget(lab)
controlsLayout.addStretch()
def buf_to_qpixmap(self, stream, mfb):
cfg = stream.configuration
if cfg.pixel_format == libcam.formats.MJPEG:
pix = QtGui.QPixmap(cfg.size.width, cfg.size.height)
pix.loadFromData(mfb.planes[0])
else:
rgb = mfb_to_rgb(mfb, cfg)
if rgb is None:
raise Exception('Format not supported: ' + cfg.pixel_format)
pix = rgb_to_pix(rgb)
return pix
def handle_request(self, stream, mfb):
ctx = self.ctx
pix = self.buf_to_qpixmap(stream, mfb)
self.label.setPixmap(pix)
self.frameLabel.setText('Queued: {}\nDone: {}\nFps: {:.2f}'
.format(ctx.reqs_queued, ctx.reqs_completed, ctx.fps))
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