create_test_videofont.py

   1 #!/usr/bin/env python3
   2
   3 import sys
   4 import os
   5 import vidi
   6
   7 #FONT_DESC = "Andale Mono, 72"
   8 FONT_DESC = "Mono, 72"
   9
  10 SAMPLE_LENGTH_SECONDS = 4
  11
  12 VIDEO_FRAMERATE = 25
  13 VIDEO_BUFFERS = SAMPLE_LENGTH_SECONDS * VIDEO_FRAMERATE
  14
  15 AUDIO_SAMPLERATE = 48000
  16 AUDIO_SAMPLESPERBUFFER = 1024
  17 AUDIO_BUFFERS = round(SAMPLE_LENGTH_SECONDS * 48000 / 1024)
  18
  19 LIVE_PIPELINE_TEMPLATE = """
  20   videotestsrc num-buffers=%d pattern=black ! video/x-raw,framerate=%d/1 ! \
  21           textoverlay valignment=center halignment=center font-desc="%s" text="{0}" ! \
  22           autovideosink \
  23   audiotestsrc num-buffers=%d samplesperbuffer=%d freq={1:f} ! audio/x-raw,rate=%d ! \
  24           autoaudiosink
  25 """ % (VIDEO_BUFFERS, VIDEO_FRAMERATE, FONT_DESC, AUDIO_BUFFERS,
  26        AUDIO_SAMPLESPERBUFFER, AUDIO_SAMPLERATE)
  27
  28 FILE_PIPELINE_TEMPLATE = """
  29   webmmux name=mux ! filesink location="{2}/sample_{0}.webm"
  30   videotestsrc num-buffers=%d pattern=black ! video/x-raw,framerate=%d/1 ! \
  31           textoverlay valignment=center halignment=center font-desc="%s" text="{0}" ! \
  32           queue ! vp9enc ! mux.
  33   audiotestsrc num-buffers=%d samplesperbuffer=%d freq={1:f} ! audio/x-raw,rate=%d ! \
  34           queue ! audioconvert ! vorbisenc quality=0.5 ! queue ! mux.
  35 """ % (VIDEO_BUFFERS, VIDEO_FRAMERATE, FONT_DESC, AUDIO_BUFFERS,
  36        AUDIO_SAMPLESPERBUFFER, AUDIO_SAMPLERATE)
  37
  38
  39 def create_test_videofont(pipeline_template, notes_range, destination_dir=None):
  40     for i, note_number in enumerate(notes_range):
  41         note = vidi.SpnNote(note_number)
  42
  43         print("%2d %s" % (i, note))
  44
  45         pipeline_string = pipeline_template.format(note.name, note.frequency, destination_dir)
  46
  47         player = vidi.Player.from_pipeline_string(pipeline_string)
  48         error = player.play()
  49         if error:
  50             break
  51
  52
  53 def usage():
  54     print("usage: %s [<videofont_destination_dir>]" %
  55           os.path.basename(sys.argv[0]))
  56
  57
  58 def main():
  59     if len(sys.argv) > 1 and sys.argv[1] in ["-h", "--help"]:
  60         usage()
  61         return 0
  62
  63     notes_range = vidi.PIANO_88_KEYS_RANGE
  64
  65     if len(sys.argv) > 1:
  66         destination_dir = os.path.realpath(sys.argv[1])
  67         if os.path.exists(destination_dir):
  68             sys.stderr.write("The destination already exists '%s'!\n"
  69                              % destination_dir)
  70             return 1
  71
  72         os.mkdir(destination_dir)
  73         create_test_videofont(FILE_PIPELINE_TEMPLATE, notes_range,
  74                               destination_dir)
  75     else:
  76         create_test_videofont(LIVE_PIPELINE_TEMPLATE, notes_range)
  77
  78
  79 if __name__ == "__main__":
  80     sys.exit(main())