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video_dewarper_perspective.py
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video_dewarper_perspective.py
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################################################################################
# The MIT License
#
# Copyright (c) 2023, Prominence AI, Inc.
#
# 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.
################################################################################
#!/usr/bin/env python
import sys
import time
from dsl import *
#-------------------------------------------------------------------------------------
# This example shows the use of a Video Dewarper to dewarp a perspective view.
#
# The Dewarper component is created with the following parameters:
# - a config "config_dewarper_perspective.txt" which defines all dewarping
# parameters - i.e. the csv files are not used for this example.
# - and a camera-id which is NOT USED! Perspecitve dewarping requires that all
# parameters be defined in the config file.
# All files are located under:
# /opt/nvidia/deepstream/deepstream/sources/apps/sample_apps/deepstream-dewarper-test/
#
# Sample perspective video stream
input_stream = \
'/opt/nvidia/deepstream/deepstream/samples/streams/yoga.mp4'
# IMPORTANT! --------------------------
# Config file specific to perspective dewarping - DOES NOT USE the csv_files
dwarper_config_file = \
'/opt/nvidia/deepstream/deepstream/sources/apps/sample_apps/deepstream-dewarper-test/config_dewarper_perspective.txt'
sink_width = DSL_1K_HD_WIDTH
sink_height = DSL_1K_HD_HEIGHT
##
# Function to be called on XWindow KeyRelease event
##
def xwindow_key_event_handler(key_string, client_data):
print('key released = ', key_string)
if key_string.upper() == 'P':
dsl_pipeline_pause('pipeline')
elif key_string.upper() == 'R':
dsl_pipeline_play('pipeline')
elif key_string.upper() == 'Q' or key_string == '' or key_string == '':
dsl_pipeline_stop('pipeline')
dsl_main_loop_quit()
##
# Function to be called on XWindow Delete event
##
def xwindow_delete_event_handler(client_data):
print('delete window event')
dsl_pipeline_stop('pipeline')
dsl_main_loop_quit()
# Function to be called on End-of-Stream (EOS) event
def eos_event_listener(client_data):
print('Pipeline EOS event')
dsl_pipeline_stop('pipeline')
dsl_main_loop_quit()
##
# Function to be called on every change of Pipeline state
##
def state_change_listener(old_state, new_state, client_data):
print('previous state = ', old_state, ', new state = ', new_state)
if new_state == DSL_STATE_PLAYING:
dsl_pipeline_dump_to_dot('pipeline', "state-playing")
def main(args):
# Since we're not using args, we can Let DSL initialize GST on first call
while True:
# New File Source using the file path specified above, repeat enabled.
retval = dsl_source_file_new('file-source', input_stream, True)
if retval != DSL_RETURN_SUCCESS:
break
# New Dewarper - config file is perspective - camera_id is NOT used as
# all parameters are defined in the config file - csv files are NOT used.
retval = dsl_dewarper_new('dewarper',
config_file = dwarper_config_file,
camera_id = 0)
if retval != DSL_RETURN_SUCCESS:
break
# We add the Dewarper directly to the source... not the Pipeline.
retval = dsl_source_video_dewarper_add('file-source', 'dewarper')
if retval != DSL_RETURN_SUCCESS:
break
# New Window Sink, 0 x/y offsets and dimensions
retval = dsl_sink_window_egl_new('egl-sink', 0, 0, sink_width, sink_height)
if retval != DSL_RETURN_SUCCESS:
break
# Enable fullscreen for a kiosk look and feel.
retval = dsl_sink_window_fullscreen_enabled_set('egl-sink', True)
if retval != DSL_RETURN_SUCCESS:
break
# Add the XWindow event handler functions defined above to the Window Sink
retval = dsl_sink_window_key_event_handler_add('egl-sink',
xwindow_key_event_handler, None)
if retval != DSL_RETURN_SUCCESS:
break
retval = dsl_sink_window_delete_event_handler_add('egl-sink',
xwindow_delete_event_handler, None)
if retval != DSL_RETURN_SUCCESS:
break
# Add all the components to a new pipeline
retval = dsl_pipeline_new_component_add_many('pipeline',
['file-source', 'egl-sink', None])
if retval != DSL_RETURN_SUCCESS:
break
# Add the XWindow event handler functions defined above
# Add the listener callback functions defined above
retval = dsl_pipeline_state_change_listener_add('pipeline',
state_change_listener, None)
if retval != DSL_RETURN_SUCCESS:
break
retval = dsl_pipeline_eos_listener_add('pipeline', eos_event_listener, None)
if retval != DSL_RETURN_SUCCESS:
break
# Play the pipeline
retval = dsl_pipeline_play('pipeline')
if retval != DSL_RETURN_SUCCESS:
break
# Join with main loop until released - blocking call
dsl_main_loop_run()
retval = DSL_RETURN_SUCCESS
break
# Print out the final result
print(dsl_return_value_to_string(retval))
dsl_pipeline_delete_all()
dsl_component_delete_all()
if __name__ == '__main__':
sys.exit(main(sys.argv))