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authorEzequiel Garcia <ezequiel@collabora.com>2019-11-20 08:45:49 -0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-09-24 21:08:40 +0300
commitaac96e34ba73a2dd63a12be446fe8db3c04db12f (patch)
tree011d7233219b8b503fb7e2374477abb70ef934aa /utils/hooks
parentda81e368e7724979d8e64c53a5a983deb9ab021a (diff)
meson: Define python3 and python3-yaml required dependencies
With this change, meson will complain specifically about missing python3 and missing python3-yaml. As specified by meson documentation: https://mesonbuild.com/Python-module.html, this change requires meson v0.51. Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'utils/hooks')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.1 (git 2.18.0) at 2025-05-30 17:10:44 +0000
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#!/usr/bin/env python3

# SPDX-License-Identifier: BSD-3-Clause
# Copyright (C) 2022, Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

# A simple libcamera capture example
#
# This is a python version of simple-cam from:
# https://git.libcamera.org/libcamera/simple-cam.git
#
# \todo Move to simple-cam repository when the Python API has stabilized more

import libcamera as libcam
import selectors
import sys
import time

TIMEOUT_SEC = 3


def handle_camera_event(cm):
    # cm.get_ready_requests() will not block here, as we know there is an event
    # to read.

    reqs = cm.get_ready_requests()

    # Process the captured frames

    for req in reqs:
        process_request(req)


def process_request(request):
    global camera

    print()

    print(f'Request completed: {request}')

    # When a request has completed, it is populated with a metadata control
    # list that allows an application to determine various properties of
    # the completed request. This can include the timestamp of the Sensor
    # capture, or its gain and exposure values, or properties from the IPA
    # such as the state of the 3A algorithms.
    #
    # To examine each request, print all the metadata for inspection. A custom
    # application can parse each of these items and process them according to
    # its needs.

    requestMetadata = request.metadata
    for id, value in requestMetadata.items():
        print(f'\t{id.name} = {value}')

    # Each buffer has its own FrameMetadata to describe its state, or the
    # usage of each buffer. While in our simple capture we only provide one
    # buffer per request, a request can have a buffer for each stream that
    # is established when configuring the camera.
    #
    # This allows a viewfinder and a still image to be processed at the
    # same time, or to allow obtaining the RAW capture buffer from the
    # sensor along with the image as processed by the ISP.

    buffers = request.buffers
    for _, buffer in buffers.items():
        metadata = buffer.metadata

        # Print some information about the buffer which has completed.
        print(f' seq: {metadata.sequence:06} timestamp: {metadata.timestamp} bytesused: ' +
              '/'.join([str(p.bytes_used) for p in metadata.planes]))

        # Image data can be accessed here, but the FrameBuffer
        # must be mapped by the application

    # Re-queue the Request to the camera.
    request.reuse()
    camera.queue_request(request)


# ----------------------------------------------------------------------------
# Camera Naming.
#
# Applications are responsible for deciding how to name cameras, and present
# that information to the users. Every camera has a unique identifier, though
# this string is not designed to be friendly for a human reader.
#
# To support human consumable names, libcamera provides camera properties
# that allow an application to determine a naming scheme based on its needs.
#
# In this example, we focus on the location property, but also detail the
# model string for external cameras, as this is more likely to be visible
# information to the user of an externally connected device.
#
# The unique camera ID is appended for informative purposes.
#
def camera_name(camera):
    props = camera.properties
    location = props.get(libcam.properties.Location, None)

    if location == libcam.properties.LocationEnum.Front:
        name = 'Internal front camera'
    elif location == libcam.properties.LocationEnum.Back:
        name = 'Internal back camera'
    elif location == libcam.properties.LocationEnum.External:
        name = 'External camera'
        if libcam.properties.Model in props:
            name += f' "{props[libcam.properties.Model]}"'
    else:
        name = 'Undefined location'

    name += f' ({camera.id})'

    return name


def main():
    global camera

    # --------------------------------------------------------------------
    # Get the Camera Manager.
    #
    # The Camera Manager is responsible for enumerating all the Camera