+++ /dev/null
-Demonstrations of Python that use various features of the Silicon
-Graphics IRIS machines.
-
-al Demonstrations of the audio capabilities of the
- Indigo. Require the built-in module 'al'. One program
- also needs the build-in module 'fl' (the FORMS
- library by Mark Overmars.)
-
-cd Demonstrations of the CD-ROM player's audio interface,
- built-in module 'cd'.
-
-flp Demonstrations of using the 'flp' standard module,
- which enables you to quickly create forms using the
- 'fl' built-in module (available if you use the FORMS
- library by Mark Overmars).
-
-gl Demonstrations of the Graphics Library (GL).
- Require the built-in module 'gl'.
-
-sv Demonstrations of the Indigo Video module.
- Requires the built-in module 'sv'. See also the
- following directory.
+++ /dev/null
-This directory contains programs using the "al" interface, which gives
-access to the most important parts of the SGI Audio Library for the
-Indigo and 4D/35.
-
-alwatch.py Watch changes in device settings
-broadcast.py Broadcast audio using UDP packets
-cmpaf.py Compare different audio compression schemes (uses fl)
-intercom.py 2-way communication with another host (uses fl)
-playaiff.py Play an AIFF file (as output by recordaiff)
-playback.py Play raw audio data read from stdin
-playold.py Play an audio file recorded by the old 4D/25 audio
-radio.py Listen to UDP packets sent by broadcast.py
-rec_play.py Repeatedly record and play back a sample
-record.py Record raw audio data to stdout
-unicast.py Like broadcast but sends to one host
+++ /dev/null
-import time
-import al, AL
-import string
-
-dev = AL.DEFAULT_DEVICE
-
-source_name = ['line', 'microphone', 'digital']
-
-params = al.queryparams(dev)
-for i in range(1, len(params), 2):
- params[i] = -1
-while 1:
- time.sleep(0.1)
- old = params[:]
- al.getparams(dev, params)
- if params <> old:
- for i in range(0, len(params), 2):
- if params[i+1] <> old[i+1]:
- name = al.getname(dev, params[i])
- if params[i] == AL.INPUT_SOURCE:
- if 0 <= old[i+1] < len(source_name):
- oldval = source_name[old[i+1]]
- else:
- oldval = ''
- newval = source_name[params[i+1]]
- else:
- oldval = `old[i+1]`
- newval = `params[i+1]`
- print string.ljust(name, 25),
- print '(' + string.rjust(oldval, 10) + ')',
- print '-->',
- print string.rjust(newval, 10)
- print
+++ /dev/null
-#! /usr/bin/env python
-
-# broadcast [port]
-#
-# Broadcast audio input on the network as UDP packets;
-# they can be received on any SGI machine with "radio.py".
-# This uses the input sampling rate, input source etc. set by apanel.
-# It uses the default sample width and #channels (16 bit/sample stereo).
-# (This is 192,000 Bytes at a sampling speed of 48 kHz, or ~137
-# packets/second -- use with caution!!!)
-
-import sys, al
-from socket import *
-
-port = 5555
-if sys.argv[1:]: port = eval(sys.argv[1])
-
-s = socket(AF_INET, SOCK_DGRAM)
-s.allowbroadcast(1)
-
-p = al.openport('broadcast', 'r')
-
-address = '<broadcast>', port
-while 1:
- # 700 samples equals 1400 bytes, or about the max packet size!
- data = p.readsamps(700)
- s.sendto(data, address)
+++ /dev/null
-# Compare different audio compression schemes.
-#
-# This copies mono audio data from the input port to the output port,
-# and puts up a window with 4 toggle buttons:
-#
-# uLAW : convert the data to uLAW and back
-# ADPCM : convert the data to ADPCM and back
-# Difference : make only the difference between the converted and the
-# original data audible
-# Exit : quit from the program
-
-import fl
-import FL
-import flp
-import al
-import AL
-import audioop
-import sys
-
-class Cmpaf:
- def __init__(self):
- parsetree = flp.parse_form('cmpaf_form','form')
- flp.create_full_form(self, parsetree)
- c = al.newconfig()
- c.setchannels(AL.MONO)
- c.setqueuesize(1800)
- self.iport = al.openport('cmpaf','r', c)
- self.oport = al.openport('cmpaf','w', c)
- self.do_adpcm = self.do_ulaw = self.do_diff = 0
- self.acstate = None
- self.form.show_form(FL.PLACE_SIZE, 1, 'compare audio formats')
-
- def run(self):
- while 1:
- olddata = data = self.iport.readsamps(600)
- if self.do_ulaw:
- data = audioop.lin2ulaw(data, 2)
- data = audioop.ulaw2lin(data, 2)
- if self.do_adpcm:
- data, nacstate = audioop.lin2adpcm(data, 2, \
- self.acstate)
- data, dummy = audioop.adpcm2lin(data, 2, \
- self.acstate)
- self.acstate = nacstate
- if self.do_diff:
- olddata = audioop.mul(olddata, 2, -1)
- data = audioop.add(olddata, data, 2)
- self.oport.writesamps(data)
- fl.check_forms()
-
- def cb_exit(self, *args):
- sys.exit(0)
-
- def cb_adpcm(self, obj, val):
- self.do_adpcm = obj.get_button()
-
- def cb_ulaw(self, obj, val):
- self.do_ulaw = obj.get_button()
-
- def cb_diff(self, obj, val):
- self.do_diff = obj.get_button()
-
-cmpaf = Cmpaf()
-cmpaf.run()
+++ /dev/null
-Magic: 12321
-
-Internal Form Definition File
- (do not change)
-
-Number of forms: 1
-
-=============== FORM ===============
-Name: form
-Width: 230.000000
-Height: 80.000000
-Number of Objects: 5
-
---------------------
-class: 1
-type: 1
-box: 0.000000 0.000000 230.000000 80.000000
-boxtype: 1
-colors: 47 47
-alignment: 4
-style: 0
-size: 11.000000
-lcol: 0
-label:
-name:
-callback:
-argument:
-
---------------------
-class: 12
-type: 1
-box: 10.000000 40.000000 100.000000 30.000000
-boxtype: 1
-colors: 39 3
-alignment: 4
-style: 0
-size: 11.000000
-lcol: 0
-label: uLAW
-name: ulawbutton
-callback: cb_ulaw
-argument: 0
-
---------------------
-class: 12
-type: 1
-box: 10.000000 10.000000 100.000000 30.000000
-boxtype: 1
-colors: 39 3
-alignment: 4
-style: 0
-size: 11.000000
-lcol: 0
-label: ADPCM
-name: adpcm_button
-callback: cb_adpcm
-argument: 0
-
---------------------
-class: 11
-type: 0
-box: 170.000000 10.000000 50.000000 20.000000
-boxtype: 1
-colors: 47 47
-alignment: 4
-style: 0
-size: 11.000000
-lcol: 0
-label: EXIT
-name: exit_button
-callback: cb_exit
-argument: 0
-
---------------------
-class: 12
-type: 1
-box: 120.000000 40.000000 100.000000 30.000000
-boxtype: 1
-colors: 39 3
-alignment: 4
-style: 0
-size: 11.000000
-lcol: 0
-label: Difference
-name: diffbutton
-callback: cb_diff
-argument: 0
-
-==============================
-create_the_forms
+++ /dev/null
-# intercom -- use mike and headset to *talk* to a person on another host.
-# For SGI 4D/35 or Indigo running IRIX 4.0.
-# Uses 16 bit sampling at 16000 samples/sec, or 32000 bytes/sec,
-# tranmitted in 32 1000-byte UDP packets. (In each direction!)
-#
-# usage:
-# intercom hostname - start talking to person on other host
-# intercom -r hostname - called remotely to do the setup
-
-from names import *
-import sys, time, posix, gl, fl, FL, al, AL, getopt, rand
-from socket import *
-
-# UDP port numbers used (one for each direction!)
-PORT1 = 51042
-PORT2 = PORT1+1
-
-# Figure out the user name
-try:
- user = posix.environ['LOGNAME']
-except:
- user = posix.environ['USER']
-
-# Debug flags (Implemented as a list; non-empty means debugging is on)
-debug = []
-
-def main():
- remote = 0
- opts, args = getopt.getopt(sys.argv[1:], 'rd')
- for opt, arg in opts:
- if opt == '-r': remote = 1
- elif opt == '-d': debug.append(opt)
- if len(args) <> 1:
- msg = 'usage: intercom [-d] [-r] hostname'
- msg = msg + ' (-r is for internal use only!)\n'
- sys.stderr.write(msg)
- sys.exit(2)
- if remote:
- server(args[0])
- else:
- client(args[0])
-
-def client(hostname):
- print 'client starting'
- cmd = 'rsh ' + hostname + ' "cd ' + AUDIODIR
- cmd = cmd + '; DISPLAY=:0; export DISPLAY'
- cmd = cmd + '; ' + PYTHON + ' intercom.py -r '
- for flag in debug: cmd = cmd + flag + ' '
- cmd = cmd + gethostname()
- cmd = cmd + '"'
- if debug: print cmd
- pipe = posix.popen(cmd, 'r')
- ack = 0
- nak = 0
- while 1:
- line = pipe.readline()
- if not line: break
- sys.stdout.write('remote: ' + line)
- if line == 'NAK\n':
- nak = 1
- break
- elif line == 'ACK\n':
- ack = 1
- break
- if nak:
- print 'Remote user doesn\'t want to talk to you.'
- return
- if not ack:
- print 'No acknowledgement (remote side crashed?).'
- return
- #
- print 'Ready...'
- #
- s = socket(AF_INET, SOCK_DGRAM)
- s.bind('', PORT2)
- #
- otheraddr = gethostbyname(hostname), PORT1
- try:
- try:
- ioloop(s, otheraddr)
- except KeyboardInterrupt:
- log('client got intr')
- except error:
- log('client got error')
- finally:
- s.sendto('', otheraddr)
- log('client finished sending empty packet to server')
- #
- log('client exit')
- print 'Done.'
-
-def server(hostname):
- print 'server starting'
- sys.stdout.flush()
- #
- if not remotedialog():
- print 'NAK'
- return
- #
- print 'ACK'
- #
- s = socket(AF_INET, SOCK_DGRAM)
- s.bind('', PORT1)
- #
- # Close std{in,out,err} so rsh will exit; reopen them as dummies
- #
- sys.stdin.close()
- sys.stdin = open('/dev/null', 'r')
- sys.stdout.close()
- sys.stdout = open('/dev/null', 'w')
- sys.stderr.close()
- if debug:
- sys.stderr = open('/tmp/intercom.err', 'a')
- else:
- sys.stderr = open('/dev/null', 'w')
- #
- ioloop(s, (gethostbyname(hostname), PORT2))
- log('server exit')
- sys.exit(0)
-
-def remotedialog():
- gl.foreground()
- gl.ringbell()
- m1 = user + ' wants to talk to you over the audio channel.'
- m2 = 'If it\'s OK, put on your headset and click Yes.'
- m3 = 'If you\'re too busy, click No.'
- return fl.show_question(m1, m2, m3)
-
-def ioloop(s, otheraddr):
- #
- dev = AL.DEFAULT_DEVICE
- params = al.queryparams(dev)
- al.getparams(dev, params)
- time.sleep(1)
- saveparams = params[:]
- for i in range(0, len(params), 2):
- if params[i] in (AL.INPUT_RATE, AL.OUTPUT_RATE):
- params[i+1] = AL.RATE_16000
- elif params[i] == AL.INPUT_SOURCE:
- params[i+1] = AL.INPUT_MIC
- try:
- al.setparams(dev, params)
- ioloop1(s, otheraddr)
- finally:
- al.setparams(dev, saveparams)
-
-def ioloop1(s, otheraddr):
- #
- # Watch out! data is in bytes, but the port counts in samples,
- # which are two bytes each (for 16-bit samples).
- # Luckily, we use mono, else it would be worse (2 samples/frame...)
- #
- SAMPSPERBUF = 500
- BYTESPERSAMP = 2 # AL.SAMPLE_16
- BUFSIZE = BYTESPERSAMP*SAMPSPERBUF
- QSIZE = 4*SAMPSPERBUF
- #
- config = al.newconfig()
- config.setqueuesize(QSIZE)
- config.setwidth(AL.SAMPLE_16)
- config.setchannels(AL.MONO)
- #
- pid = posix.fork()
- if pid:
- # Parent -- speaker/headphones handler
- log('parent started')
- spkr = al.openport('spkr', 'w', config)
- while 1:
- data = s.recv(BUFSIZE)
- if len(data) == 0:
- # EOF packet
- log('parent got empty packet; killing child')
- posix.kill(pid, 15)
- return
- # Discard whole packet if we are too much behind
- if spkr.getfillable() > len(data) / BYTESPERSAMP:
- if len(debug) >= 2:
- log('parent Q full; dropping packet')
- spkr.writesamps(data)
- else:
- # Child -- microphone handler
- log('child started')
- try:
- try:
- mike = al.openport('mike', 'r', config)
- # Sleep a while to let the other side get started
- time.sleep(1)
- # Drain the queue before starting to read
- data = mike.readsamps(mike.getfilled())
- # Loop, sending packets from the mike to the net
- while 1:
- data = mike.readsamps(SAMPSPERBUF)
- s.sendto(data, otheraddr)
- except KeyboardInterrupt:
- log('child got interrupt; exiting')
- posix._exit(0)
- except error:
- log('child got error; exiting')
- posix._exit(1)
- finally:
- log('child got unexpected error; leaving w/ traceback')
-
-def log(msg):
- if not debug: return
- if type(msg) <> type(''):
- msg = `msg`
-
- f = open('/tmp/intercom.log', 'a')
- f.write(`sys.argv` + ' ' + `posix.getpid()` + ': ' + msg + '\n')
- f.close()
-
-main()
+++ /dev/null
-# Listen to the input on host argv[1].
-
-import sys, al, AL, posix
-
-BUFSIZE = 2000
-QSIZE = 4000
-
-def main():
- if len(sys.argv) <> 2:
- sys.stderr.write('usage: ' + sys.argv[0] + ' hostname\n')
- sys.exit(2)
- hostname = sys.argv[1]
- cmd = 'exec rsh </dev/null ' + hostname + \
- ' "cd /ufs/guido/mm/demo/audio; ' + \
- 'exec /ufs/guido/bin/sgi/python record.py"'
- pipe = posix.popen(cmd, 'r')
- config = al.newconfig()
- config.setchannels(AL.MONO)
- config.setqueuesize(QSIZE)
- port = al.openport('', 'w', config)
- while 1:
- data = pipe.read(BUFSIZE)
- if not data:
- sts = pipe.close()
- sys.stderr.write(sys.argv[0] + ': end of data\n')
- if sts: sys.stderr.write('rsh exit status '+`sts`+'\n')
- sys.exit(1)
- port.writesamps(data)
- del data
-
-try:
- main()
-except KeyboardInterrupt:
- sys.exit(1)
+++ /dev/null
-import sys
-
-# My home directory/
-GUIDO = '/ufs/guido/'
-
-# Hack sys.path so AL can be found
-LIB = GUIDO + 'lib/python'
-if LIB not in sys.path: sys.path.insert(0, LIB)
-
-# Python binary to be used on remote machine
-PYTHON = GUIDO + 'bin/sgi/python'
-
-# Directory where the programs live
-AUDIODIR = GUIDO + 'src/python/demo/sgi/al'
+++ /dev/null
-import aiff
-import al
-import sys
-import time
-
-def main():
- v = 1
- c = al.newconfig()
- nchannels = c.getchannels()
- nsampframes = 0 # ???
- sampwidth = c.getwidth()
- samprate = 0.0 # unknown
- filename = sys.argv[1]
- f = open(filename, 'r')
- type, totalsize = aiff.read_chunk_header(f)
- if type <> 'FORM':
- raise aiff.Error, 'FORM chunk expected at start of file'
- aiff.read_form_chunk(f)
- while 1:
- try:
- type, size = aiff.read_chunk_header(f)
- except EOFError:
- break
- if v: print 'header:', `type`, size
- if type == 'COMM':
- nchannels, nsampframes, sampwidth, samprate = \
- aiff.read_comm_chunk(f)
- if v: print nchannels, nsampframes, sampwidth, samprate
- elif type == 'SSND':
- offset, blocksize = aiff.read_ssnd_chunk(f)
- if v: print offset, blocksize
- data = f.read(size-8)
- if size%2: void = f.read(1)
- p = makeport(nchannels, sampwidth, samprate)
- play(p, data, offset, blocksize)
- elif type in aiff.skiplist:
- aiff.skip_chunk(f, size)
- else:
- raise aiff.Error, 'bad chunk type ' + type
-
-def makeport(nchannels, sampwidth, samprate):
- c = al.newconfig()
- c.setchannels(nchannels)
- c.setwidth(sampwidth/8)
- # can't set the rate...
- p = al.openport('', 'w', c)
- return p
-
-def play(p, data, offset, blocksize):
- data = data[offset:]
- p.writesamps(data)
- while p.getfilled() > 0: time.sleep(0.01)
-
-main()
+++ /dev/null
-# Read mono 16bit samples from stdin and write them to the audio device.
-# Assume the sampling rate is compatible.
-# Use a small queue size to minimize delays.
-
-import al, sys
-import AL
-
-BUFSIZE = 2000
-QSIZE = 4000
-
-def main():
- c = al.newconfig()
- c.setchannels(AL.MONO)
- c.setqueuesize(QSIZE)
- p = al.openport('', 'w', c)
- while 1:
- data = sys.stdin.read(BUFSIZE)
- p.writesamps(data)
-
-try:
- main()
-except KeyboardInterrupt:
- sys.exit(1)
+++ /dev/null
-# Play old style sound files (Guido's private format)
-
-import al, sys, time
-import AL
-
-BUFSIZE = 8000
-
-def main():
- if len(sys.argv) < 2:
- f = sys.stdin
- filename = sys.argv[0]
- else:
- if len(sys.argv) <> 2:
- sys.stderr.write('usage: ' + \
- sys.argv[0] + ' filename\n')
- sys.exit(2)
- filename = sys.argv[1]
- f = open(filename, 'r')
- #
- magic = f.read(4)
- extra = ''
- if magic == '0008':
- rate = 8000
- elif magic == '0016':
- rate = 16000
- elif magic == '0032':
- rate = 32000
- else:
- sys.stderr.write('no magic header; assuming 8k samples/sec.\n')
- rate = 8000
- extra = magic
- #
- pv = [AL.OUTPUT_RATE, rate]
- al.setparams(AL.DEFAULT_DEVICE, pv)
- c = al.newconfig()
- c.setchannels(AL.MONO)
- c.setwidth(AL.SAMPLE_8)
- port = al.openport(filename, 'w', c)
- if extra:
- port.writesamps(extra)
- while 1:
- buf = f.read(BUFSIZE)
- if not buf: break
- port.writesamps(buf)
- while port.getfilled() > 0:
- time.sleep(0.1)
-
-try:
- main()
-except KeyboardInterrupt:
- sys.exit(1)
+++ /dev/null
-#! /usr/bin/env python
-
-# radio [port]
-#
-# Receive audio packets broadcast by "broadcast.py" on another SGI machine.
-# Use apanel to set the output sampling rate to match that of the broadcast.
-
-import sys, al
-from socket import *
-
-port = 5555
-if sys.argv[1:]: port = eval(sys.argv[1])
-
-s = socket(AF_INET, SOCK_DGRAM)
-s.bind('', port)
-
-p = al.openport('radio', 'w')
-
-while 1:
- data = s.recv(1400)
- p.writesamps(data)
+++ /dev/null
-#
-# records an AIFF sample and plays it
-# infinity number of times.
-#
-
-import time
-import al
-
-def recordit () :
- p = al.openport('hello', 'r')
- print 'recording...'
- buf = p.readsamps(500000)
- print 'done.'
- p.closeport()
-
- return buf
-
-def playit (buf) :
- p = al.openport('hello', 'w')
- print 'playing...'
- p.writesamps(buf)
- while p.getfilled() > 0:
- time.sleep(0.01)
- print 'done.'
- p.closeport()
-
-while 1 :
- playit (recordit ())
+++ /dev/null
-# Record mono 16bits samples from the audio device and send them to stdout.
-# Assume the sampling rate is compatible.
-# Use a small queue size to minimize delays.
-
-import al, sys
-import AL
-
-BUFSIZE = 2000
-QSIZE = 4000
-
-def main():
- c = al.newconfig()
- c.setchannels(AL.MONO)
- c.setqueuesize(QSIZE)
- p = al.openport('', 'r', c)
- while 1:
- data = p.readsamps(BUFSIZE)
- sys.stdout.write(data)
-
-try:
- main()
-except KeyboardInterrupt:
- sys.exit(1)
+++ /dev/null
-#! /usr/bin/env python
-
-# unicast host [port]
-#
-# Similar to "broadcast.py" but sends to a specific host only;
-# use "radio.py" on the designated host to receive.
-# This is less stressful on other hosts on the same ethernet segment
-# if you need to send to one host only.
-
-import sys, al
-from socket import *
-
-host = sys.argv[1]
-
-port = 5555
-if sys.argv[2:]: port = eval(sys.argv[1])
-
-s = socket(AF_INET, SOCK_DGRAM)
-
-p = al.openport('unicast', 'r')
-
-address = host, port
-while 1:
- # 700 samples equals 1400 bytes, or about the max packet size!
- data = p.readsamps(700)
- s.sendto(data, address)
+++ /dev/null
-# Demonstrate that rsh exits when the remote end closes std{in,out,err}.
-# rsh voorn exec /ufs/guido/bin/sgi/python /ufs/guido/mm/demo/audio/x.py
-
-print 'hoi!'
-import sys
-sys.stdin.close()
-sys.stdout.close()
-sys.stderr.close()
-import time
-time.sleep(5)
-sys.stdout = open('@', 'w')
-sys.stdout.write('Hello\n')
+++ /dev/null
-Programs that demonstrate the use of the audio device on the SGI 4D/25.
-These require the built-in module 'audio'.
-
-XXX This hardware is already obsolete; see ../al for examples of audio
-XXX on the Indigo and 4D/35.
-
-play Read a sound sample from a file and play it through the
- speaker. Options to set volume, sampling rate etc.
+++ /dev/null
-#! /usr/bin/env python
-
-import sys
-import audio
-
-import string
-import getopt
-import auds
-
-debug = []
-
-DEF_RATE = 3
-
-def main():
- #
- gain = 100
- rate = 0
- starter = audio.write
- stopper = 0
- #
- optlist, args = getopt.getopt(sys.argv[1:], 'adg:r:')
- #
- for optname, optarg in optlist:
- if 0:
- pass
- elif optname == '-d':
- debug.append(1)
- elif optname == '-g':
- gain = string.atoi(optarg)
- if not (0 < gain < 256):
- raise optarg.error, '-g gain out of range'
- elif optname == '-r':
- rate = string.atoi(optarg)
- if not (1 <= rate <= 3):
- raise optarg.error, '-r rate out of range'
- elif optname == '-a':
- starter = audio.start_playing
- stopper = audio.wait_playing
- #
- audio.setoutgain(gain)
- audio.setrate(rate)
- #
- if not args:
- play(starter, rate, auds.loadfp(sys.stdin))
- else:
- real_stopper = 0
- for file in args:
- if real_stopper:
- real_stopper()
- play(starter, rate, auds.load(file))
- real_stopper = stopper
-
-def play(starter, rate, data):
- magic = data[:4]
- if magic == '0008':
- mrate = 3
- elif magic == '0016':
- mrate = 2
- elif magic == '0032':
- mrate = 1
- else:
- mrate = 0
- if mrate:
- data = data[4:]
- else:
- mrate = DEF_RATE
- if not rate: rate = mrate
- audio.setrate(rate)
- starter(data)
-
-try:
- main()
-finally:
- audio.setoutgain(0)
- audio.done()
+++ /dev/null
-Demo programs for the SGI Video library for the Indigo (IRIX 4.0.5).
-
-These are more-or-less literal translations of the C programs from the
-Indigo Video Programming Guide, by Sjoerd Mullender, with some changes
-by Guido.
-
-Note that none of the example programs save any data to a file,
-although this would be easy to do (e.g. individual grabbed frames
-could be written as SGI image files using the imgfile module).
-
-We have written a Python program to record live video to file (within
-the limits of the Indigo video board), and a suite of programs to
-manipulate and display such files. At the moment we don't distribute
-these programs, since the file format is, eh..., weird, to say the
-least. However, if you are really interested we can mail you the
-source.
-
-Also note that we haven't tried using video *output* yet.
-
-simpleinput.py Live video in a resizable window
-rgbgrab.py Grab still frames
-contcapt.py Continuous capturing
-burstcapt.py Burst capturing
+++ /dev/null
-import sys
-import sv, SV
-import gl, GL, DEVICE
-
-def main():
- format = SV.RGB8_FRAMES
- requestedwidth = SV.PAL_XMAX
- queuesize = 30
- if sys.argv[1:]:
- queuesize = eval(sys.argv[1])
-
- v = sv.OpenVideo()
- svci = (format, requestedwidth, 0, queuesize, 0)
-
- go = raw_input('Press return to capture ' + `queuesize` + ' frames: ')
- result = v.CaptureBurst(svci)
- svci, buffer, bitvec = result
-## svci, buffer = result # XXX If bit vector not yet implemented
-
- print 'Captured', svci[3], 'frames, i.e.', len(buffer)/1024, 'K bytes'
-
- w, h = svci[1:3]
- framesize = w * h
-
- gl.prefposition(300, 300+w-1, 100, 100+h-1)
- gl.foreground()
- win = gl.winopen('Burst Capture')
- gl.RGBmode()
- gl.gconfig()
- gl.qdevice(DEVICE.LEFTMOUSE)
- gl.qdevice(DEVICE.ESCKEY)
-
- print 'Click left mouse for next frame'
-
- for i in range(svci[3]):
- inverted_frame = sv.RGB8toRGB32(1, \
- buffer[i*framesize:(i+1)*framesize], w, h)
- gl.lrectwrite(0, 0, w-1, h-1, inverted_frame)
- while 1:
- dev, val = gl.qread()
- if dev == DEVICE.LEFTMOUSE and val == 1:
- break
- if dev == DEVICE.REDRAW:
- gl.lrectwrite(0, 0, w-1, h-1, inverted_frame)
- if dev == DEVICE.ESCKEY:
- v.CloseVideo()
- gl.winclose(win)
- return
- v.CloseVideo()
- gl.winclose(win)
-
-main()
+++ /dev/null
-import sys
-import sv, SV
-import gl, GL, DEVICE
-
-def main():
- format = SV.RGB8_FRAMES
- framerate = 25
- queuesize = 16
- samplingrate = 2
-
- v = sv.OpenVideo()
- # Determine maximum window size based on signal standard
- param = [SV.BROADCAST, 0]
- v.GetParam(param)
- if param[1] == SV.PAL:
- width = SV.PAL_XMAX
- height = SV.PAL_YMAX
- framefreq = 25
- else:
- width = SV.NTSC_XMAX
- height = SV.NTSC_YMAX
- framefreq = 30
-
- # Allow resizing window if capturing RGB frames, which can be scaled
- if format == SV.RGB8_FRAMES:
- gl.keepaspect(width, height)
- gl.maxsize(width, height)
- gl.stepunit(8, 6)
- gl.minsize(120, 90)
- else:
- if format == SV.YUV411_FRAMES_AND_BLANKING_BUFFER:
- height = height + SV.BLANKING_BUFFER_SIZE
- gl.prefposition(300, 300+width-1, 100, 100+height-1)
-
- # Open the window
- gl.foreground()
- win = gl.winopen('Continuous Capture')
- gl.RGBmode()
- gl.gconfig()
- if format == SV.RGB8_FRAMES:
- width, height = gl.getsize()
- gl.pixmode(GL.PM_SIZE, 8)
- else:
- gl.pixmode(GL.PM_SIZE, 32)
-
- svci = (format, width, height, queuesize, samplingrate)
- [svci]
-
- svci = v.InitContinuousCapture(svci)
- width, height = svci[1:3]
- [svci]
-
- hz = gl.getgdesc(GL.GD_TIMERHZ)
- gl.noise(DEVICE.TIMER0, hz / framerate)
- gl.qdevice(DEVICE.TIMER0)
- gl.qdevice(DEVICE.WINQUIT)
- gl.qdevice(DEVICE.WINSHUT)
- gl.qdevice(DEVICE.ESCKEY)
-
- ndisplayed = 0
- lastfieldID = 0
-
- while 1:
- dev, val = gl.qread()
- if dev == DEVICE.REDRAW:
- oldw = width
- oldh = height
- width, height = gl.getsize()
- if oldw != width or oldh != height:
- v.EndContinuousCapture()
- gl.viewport(0, width-1, 0, height-1)
- svci = (svci[0], width, height) + svci[3:]
- svci = v.InitContinuousCapture(svci)
- width, height = svci[1:3]
- [svci]
- if ndisplayed:
- print 'lost',
- print fieldID/(svci[4]*2) - ndisplayed,
- print 'frames'
- ndisplayed = 0
- elif dev == DEVICE.TIMER0:
- try:
- captureData, fieldID = v.GetCaptureData()
- except sv.error, val:
- if val <> 'no data available':
- print val
- continue
- if fieldID - lastfieldID <> 2*samplingrate:
- print lastfieldID, fieldID
- lastfieldID = fieldID
- if svci[0] == SV.RGB8_FRAMES:
- rgbbuf = captureData.InterleaveFields(1)
- else:
- rgbbuf = captureData.YUVtoRGB(1)
- captureData.UnlockCaptureData()
- gl.lrectwrite(0, 0, width-1, height-1, rgbbuf)
- ndisplayed = ndisplayed + 1
- elif dev in (DEVICE.ESCKEY, DEVICE.WINQUIT, DEVICE.WINSHUT):
- v.EndContinuousCapture()
- v.CloseVideo()
- gl.winclose(win)
- print fieldID, ndisplayed, svci[4]
- print 'lost', fieldID/(svci[4]*2) - ndisplayed,
- print 'frames'
- return
-
-main()
+++ /dev/null
-import sys
-import sv, SV
-import gl, GL, DEVICE
-import time
-
-def main():
- v = sv.OpenVideo()
- # Determine maximum window size based on signal standard
- param = [SV.BROADCAST, 0]
- v.GetParam(param)
- if param[1] == SV.PAL:
- width = SV.PAL_XMAX
- height = SV.PAL_YMAX
- elif param[1] == SV.NTSC:
- width = SV.NTSC_XMAX
- height = SV.NTSC_YMAX
- else:
- print 'Unknown video standard', param[1]
- sys.exit(1)
-
- # Initially all windows are half size
- grabwidth, grabheight = width/2, height/2
-
- # Open still window
- gl.foreground()
- gl.prefsize(grabwidth, grabheight)
- still_win = gl.winopen('Grabbed frame')
- gl.keepaspect(width, height)
- gl.maxsize(width, height)
- gl.winconstraints()
- gl.RGBmode()
- gl.gconfig()
- gl.clear()
- gl.pixmode(GL.PM_SIZE, 8)
-
- # Open live window
- gl.foreground()
- gl.prefsize(grabwidth, grabheight)
- live_win = gl.winopen('Live video')
- gl.keepaspect(width, height)
- gl.maxsize(width, height)
- gl.winconstraints()
-
- # Bind live video
- v.SetSize(gl.getsize())
- v.BindGLWindow(live_win, SV.IN_REPLACE)
-
- print 'Use leftmouse to grab frame'
-
- gl.qdevice(DEVICE.LEFTMOUSE)
- gl.qdevice(DEVICE.WINQUIT)
- gl.qdevice(DEVICE.WINSHUT)
- gl.qdevice(DEVICE.ESCKEY)
- frame = None
- while 1:
- dev, val = gl.qread()
- if dev == DEVICE.LEFTMOUSE and val == 0:
- w, h, fields = v.CaptureOneFrame(SV.RGB8_FRAMES, \
- grabwidth, grabheight)
- frame = sv.InterleaveFields(1, fields, w, h)
- gl.winset(still_win)
- gl.lrectwrite(0, 0, w - 1, h - 1, frame)
- gl.winset(live_win)
- if dev in (DEVICE.ESCKEY, DEVICE.WINQUIT, DEVICE.WINSHUT):
- v.CloseVideo()
- gl.winclose(live_win)
- gl.winclose(still_win)
- break
- if dev == DEVICE.REDRAW and val == still_win:
- gl.winset(still_win)
- gl.reshapeviewport()
- gl.clear()
- grabwidth, grabheight = gl.getsize()
- if frame:
- gl.lrectwrite(0, 0, w - 1, h - 1, frame)
- gl.winset(live_win)
- if dev == DEVICE.REDRAW and val == live_win:
- v.SetSize(gl.getsize())
- v.BindGLWindow(live_win, SV.IN_REPLACE)
-
-main()
+++ /dev/null
-import sv, SV
-import gl, DEVICE
-
-def main():
- gl.foreground()
- gl.prefsize(SV.PAL_XMAX, SV.PAL_YMAX)
- win = gl.winopen('video test')
- v = sv.OpenVideo()
- params = [SV.VIDEO_MODE, SV.COMP, SV.BROADCAST, SV.PAL]
- v.SetParam(params)
- v.BindGLWindow(win, SV.IN_REPLACE)
- gl.qdevice(DEVICE.ESCKEY)
- gl.qdevice(DEVICE.WINQUIT)
- gl.qdevice(DEVICE.WINSHUT)
- while 1:
- dev, val = gl.qread()
- if dev in (DEVICE.ESCKEY, DEVICE.WINSHUT, DEVICE.WINQUIT):
- v.CloseVideo()
- gl.winclose(win)
- return
-
-main()
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