Move webrtc/{tools => rtc_tools}

webrtc/tools/barcode_tools/yuv_cropper.py

-#!/usr/bin/env python
-# Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
-#
-# Use of this source code is governed by a BSD-style license
-# that can be found in the LICENSE file in the root of the source
-# tree. An additional intellectual property rights grant can be found
-# in the file PATENTS.  All contributing project authors may
-# be found in the AUTHORS file in the root of the source tree.
-
-import optparse
-import os
-import sys
-
-
-def _CropOneFrame(yuv_file, output_file, component_sizes):
-  """Crops one frame.
-
-  This function crops one frame going through all the YUV planes and cropping
-  respective amount of rows.
-
-  Args:
-    yuv_file(file): The opened (for binary reading) YUV file.
-    output_file(file): The opened (for binary writing) file.
-    component_sizes(list of 3 3-ples): The list contains the sizes for all the
-      planes (Y, U, V) of the YUV file plus the crop_height scaled for every
-      plane. The sizes equal width, height and crop_height for the Y plane,
-      and are equal to width/2, height/2 and crop_height/2 for the U and V
-      planes.
-  Return:
-    (bool): True if there are more frames to crop, False otherwise.
-  """
-  for comp_width, comp_height, comp_crop_height in component_sizes:
-    for row in range(comp_height):
-      # Read the plane data for this row.
-      yuv_plane = yuv_file.read(comp_width)
-
-      # If the plane is empty, we have reached the end of the file.
-      if yuv_plane == "":
-        return False
-
-      # Only write the plane data for the rows bigger than crop_height.
-      if row >= comp_crop_height:
-        output_file.write(yuv_plane)
-  return True
-
-
-def CropFrames(yuv_file_name, output_file_name, width, height, crop_height):
-  """Crops rows of pixels from the top of the YUV frames.
-
-  This function goes through all the frames in a video and crops the crop_height
-  top pixel rows of every frame.
-
-  Args:
-    yuv_file_name(string): The name of the YUV file to be cropped.
-    output_file_name(string): The name of the output file where the result will
-      be written.
-    width(int): The width of the original YUV file.
-    height(int): The height of the original YUV file.
-    crop_height(int): The height (the number of pixel rows) to be cropped from
-      the frames.
-  """
-  # Component sizes = [Y_sizes, U_sizes, V_sizes].
-  component_sizes = [(width, height, crop_height),
-                     (width/2, height/2, crop_height/2),
-                     (width/2, height/2, crop_height/2)]
-
-  yuv_file = open(yuv_file_name, 'rb')
-  output_file = open(output_file_name, 'wb')
-
-  data_left = True
-  while data_left:
-    data_left = _CropOneFrame(yuv_file, output_file, component_sizes)
-
-  yuv_file.close()
-  output_file.close()
-
-
-def _ParseArgs():
-  """Registers the command-line options."""
-  usage = "usage: %prog [options]"
-  parser = optparse.OptionParser(usage=usage)
-
-  parser.add_option('--width', type='int',
-                    default=352,
-                    help=('Width of the YUV file\'s frames. '
-                          'Default: %default'))
-  parser.add_option('--height', type='int', default=288,
-                    help=('Height of the YUV file\'s frames. '
-                          'Default: %default'))
-  parser.add_option('--crop_height', type='int', default=32,
-                    help=('How much of the top of the YUV file to crop. '
-                          'Has to be module of 2. Default: %default'))
-  parser.add_option('--yuv_file', type='string',
-                    help=('The YUV file to be cropped.'))
-  parser.add_option('--output_file', type='string', default='output.yuv',
-                    help=('The output YUV file containing the cropped YUV. '
-                          'Default: %default'))
-  options = parser.parse_args()[0]
-  if not options.yuv_file:
-    parser.error('yuv_file argument missing. Please specify input YUV file!')
-  return options
-
-
-def main():
-  """A tool to crop rows of pixels from the top part of a YUV file.
-
-  A simple invocation will be:
-  ./yuv_cropper.py --width=640 --height=480 --crop_height=32
-  --yuv_file=<path_and_name_of_yuv_file>
-  --output_yuv=<path and name_of_output_file>
-  """
-  options = _ParseArgs()
-
-  if os.path.getsize(options.yuv_file) == 0:
-    sys.stderr.write('Error: The YUV file you have passed has size 0. The '
-                     'produced output will also have size 0.\n')
-    return -1
-
-  CropFrames(options.yuv_file, options.output_file, options.width,
-             options.height, options.crop_height)
-  return 0
-
-
-if __name__ == '__main__':
-  sys.exit(main())