cpython/Demo/sgi/video/Vrecb.py

430 lines
10 KiB
Python
Executable File

#! /usr/bin/env python
# Capture a CMIF movie using the Indigo video library and board in burst mode
# User interface:
#
# Start the application. Resize the window to the desired movie size.
# Press the left mouse button to start recording, release it to end
# recording. You can record as many times as you wish, but each time
# you overwrite the output file(s), so only the last recording is
# kept.
#
# Press ESC or select the window manager Quit or Close window option
# to quit. If you quit before recording anything, the output file(s)
# are not touched.
import sys
sys.path.append('/ufs/guido/src/video')
import sv, SV
import VFile
import gl, GL, DEVICE
import al, AL
import time
import posix
import getopt
import string
import imageop
import sgi
# Usage and help functions (keep this up-to-date if you change the program!)
def usage():
print 'Usage: Vrecb [options] [moviefile [audiofile]]'
print
print 'Options:'
print '-a : record audio as well'
print '-r rate : capture 1 out of every "rate" frames', \
'(default and min 1)'
print '-w width : initial window width', \
'(default 256, use 0 for interactive placement)'
print '-d : drop fields if needed'
print '-g bits : greyscale (2, 4 or 8 bits)'
print '-G : 2-bit greyscale dithered'
print '-m : monochrome dithered'
print '-M value : monochrome tresholded with value'
print '-f : Capture fields (instead of frames)'
print '-n number : Capture this many frames (default 60)'
print '-N memsize : Capture frames fitting in this many kbytes'
print 'moviefile : here goes the movie data (default film.video)'
def help():
print 'Press the left mouse button to start recording.'
print 'Recording time is determined by the -n option.'
print 'You can record as many times as you wish, but each'
print 'recording overwrites the output file(s) -- only the'
print 'last recording is kept.'
print
print 'Press ESC or use the window manager Quit or Close window option'
print 'to quit. If you quit before recording anything, the output'
print 'file(s) are not touched.'
# Main program
def main():
format = SV.RGB8_FRAMES
audio = 0
rate = 1
width = 256
drop = 0
mono = 0
grey = 0
greybits = 0
monotreshold = -1
fields = 0
number = 0
memsize = 0
try:
opts, args = getopt.getopt(sys.argv[1:], 'ar:w:dg:mM:Gfn:N:')
except getopt.error, msg:
sys.stdout = sys.stderr
print 'Error:', msg, '\n'
usage()
sys.exit(2)
try:
for opt, arg in opts:
if opt == '-a':
audio = 1
if opt == '-r':
rate = string.atoi(arg)
if rate < 1:
sys.stderr.write('-r rate must be >= 1\n')
sys.exit(2)
elif opt == '-w':
width = string.atoi(arg)
elif opt == '-d':
drop = 1
elif opt == '-g':
grey = 1
greybits = string.atoi(arg)
if not greybits in (2,4,8):
sys.stderr.write( \
'Only 2, 4 or 8 bit greyscale supported\n')
sys.exit(2)
elif opt == '-G':
grey = 1
greybits = -2
elif opt == '-m':
mono = 1
elif opt == '-M':
mono = 1
monotreshold = string.atoi(arg)
elif opt == '-f':
fields = 1
elif opt == '-n':
number = string.atoi(arg)
elif opt == '-N':
memsize = string.atoi(arg)
if 0 < memsize < 1024:
memsize = memsize * 1024
if 0 < memsize < 1024*1024:
memsize = memsize * 1024
print 'memsize', memsize
except string.atoi_error:
sys.stdout = sys.stderr
print 'Option', opt, 'requires integer argument'
sys.exit(2)
if number <> 0 and memsize <> 0:
sys.stderr.write('-n and -N are mutually exclusive\n')
sys.exit(2)
if number == 0 and memsize == 0:
number = 60
if not fields:
print '-f option assumed until somebody fixes it'
fields = 1
if args[2:]:
sys.stderr.write('usage: Vrecb [options] [file [audiofile]]\n')
sys.exit(2)
if args:
filename = args[0]
else:
filename = 'film.video'
if args[1:] and not audio:
sys.stderr.write('-a turned on by appearance of 2nd file\n')
audio = 1
if audio:
if args[1:]:
audiofilename = args[1]
else:
audiofilename = 'film.aiff'
else:
audiofilename = None
v = sv.OpenVideo()
# Determine maximum window size based on signal standard
param = [SV.BROADCAST, 0]
v.GetParam(param)
if param[1] == SV.PAL:
x = SV.PAL_XMAX
y = SV.PAL_YMAX
elif param[1] == SV.NTSC:
x = SV.NTSC_XMAX
y = SV.NTSC_YMAX
else:
print 'Unknown video standard', param[1]
sys.exit(1)
gl.foreground()
gl.maxsize(x, y)
gl.keepaspect(x, y)
gl.stepunit(8, 6)
if width:
height = width*3/4
x1 = 150
x2 = x1 + width-1
y2 = 768-150
y1 = y2-height+1
gl.prefposition(x1, x2, y1, y2)
win = gl.winopen(filename)
if width:
gl.maxsize(x, y)
gl.keepaspect(x, y)
gl.stepunit(8, 6)
gl.winconstraints()
x, y = gl.getsize()
print x, 'x', y
if memsize:
number = calcnumber(x, y, grey or mono, memsize)
print number, 'frames'
v.SetSize(x, y)
if drop:
param = [SV.FIELDDROP, 1, SV.GENLOCK, SV.GENLOCK_OFF]
else:
param = [SV.FIELDDROP, 0, SV.GENLOCK, SV.GENLOCK_ON]
if mono or grey:
param = param+[SV.COLOR, SV.MONO, SV.DITHER, 0, \
SV.INPUT_BYPASS, 1]
else:
param = param+[SV.COLOR, SV.DEFAULT_COLOR, SV.INPUT_BYPASS, 0]
v.BindGLWindow(win, SV.IN_REPLACE)
v.SetParam(param)
gl.qdevice(DEVICE.LEFTMOUSE)
gl.qdevice(DEVICE.WINQUIT)
gl.qdevice(DEVICE.WINSHUT)
gl.qdevice(DEVICE.ESCKEY)
help()
while 1:
dev, val = gl.qread()
if dev == DEVICE.LEFTMOUSE:
if val == 1:
info = format, x, y, number, rate
record(v, info, filename, audiofilename, \
mono, grey, \
greybits, monotreshold, fields)
elif dev == DEVICE.REDRAW:
# Window resize (or move)
x, y = gl.getsize()
print x, 'x', y
if memsize:
number = calcnumber(x, y, grey or mono, memsize)
print number, 'frames'
v.SetSize(x, y)
v.BindGLWindow(win, SV.IN_REPLACE)
elif dev in (DEVICE.ESCKEY, DEVICE.WINQUIT, DEVICE.WINSHUT):
# Quit
v.CloseVideo()
gl.winclose(win)
break
def calcnumber(x, y, grey, memsize):
pixels = x*y
pixels = pixels/2 # XXX always assume fields
if grey: n = memsize/pixels
else: n = memsize/(4*pixels)
return max(1, n)
# Record until the mouse is released (or any other GL event)
# XXX audio not yet supported
def record(v, info, filename, audiofilename, \
mono, grey, greybits, monotreshold, fields):
import thread
format, x, y, number, rate = info
fps = 59.64 # Fields per second
# XXX (Strange: need fps of Indigo monitor, not of PAL or NTSC!)
tpf = 1000.0 / fps # Time per field in msec
#
# Go grab
#
if audiofilename:
gl.wintitle('(start audio) ' + filename)
audiodone = thread.allocate_lock()
audiodone.acquire_lock()
audiostart = thread.allocate_lock()
audiostart.acquire_lock()
audiostop = []
initaudio(audiofilename, audiostop, audiostart, audiodone)
audiostart.acquire_lock()
gl.wintitle('(rec) ' + filename)
try:
ninfo, data, bitvec = v.CaptureBurst(info)
except sv.error, arg:
print 'CaptureBurst failed:', arg
print 'info:', info
gl.wintitle(filename)
return
gl.wintitle('(save) '+ filename)
#
# Check results
#
if info <> ninfo:
print 'Sorry, format changed.'
print 'Wanted:',info
print 'Got :',ninfo
gl.wintitle(filename)
return
# print bitvec
if x*y*number <> len(data):
print 'Funny data length: wanted',x,'*',y,'*', number,'=',\
x*y*number,'got',len(data)
gl.wintitle(filename)
return
#
# Save
#
if filename and audiofilename:
audiostop.append(None)
audiodone.acquire_lock()
if filename:
#
# Construct header and write it
#
try:
vout = VFile.VoutFile(filename)
except IOError, msg:
print filename, ':', msg
sys.exit(1)
if mono:
vout.format = 'mono'
elif grey and greybits == 8:
vout.format = 'grey'
elif grey:
vout.format = 'grey'+`abs(greybits)`
else:
vout.format = 'rgb8'
vout.width = x
vout.height = y
if fields:
vout.packfactor = (1,-2)
else:
print 'Sorry, can only save fields at the moment'
print '(i.e. you *must* use the -f option)'
gl.wintitle(filename)
return
vout.writeheader()
#
# Compute convertor, if needed
#
convertor = None
if grey:
if greybits == 2:
convertor = imageop.grey2grey2
elif greybits == 4:
convertor = imageop.grey2grey4
elif greybits == -2:
convertor = imageop.dither2grey2
fieldsize = x*y/2
nskipped = 0
realframeno = 0
tpf = 1000 / 50.0 #XXXX
# Trying to find the pattern in frame skipping
okstretch = 0
skipstretch = 0
for frameno in range(0, number*2):
if frameno <> 0 and \
bitvec[frameno] == bitvec[frameno-1]:
nskipped = nskipped + 1
if okstretch:
print okstretch, 'ok',
okstretch = 0
skipstretch = skipstretch + 1
continue
if skipstretch:
print skipstretch, 'skipped'
skipstretch = 0
okstretch = okstretch + 1
#
# Save field.
# XXXX Works only for fields and top-to-bottom
#
start = frameno*fieldsize
field = data[start:start+fieldsize]
if convertor:
field = convertor(field, len(field), 1)
elif mono and monotreshold >= 0:
field = imageop.grey2mono( \
field, len(field), 1, monotreshold)
elif mono:
field = imageop.dither2mono( \
field, len(field), 1)
realframeno = realframeno + 1
vout.writeframe(int(realframeno*tpf), field, None)
print okstretch, 'ok',
print skipstretch, 'skipped'
print 'Skipped', nskipped, 'duplicate frames'
vout.close()
gl.wintitle('(done) ' + filename)
# Initialize audio recording
AQSIZE = 8*8000 # XXX should be a user option
def initaudio(filename, stop, start, done):
import thread, aifc
afile = aifc.open(filename, 'w')
afile.setnchannels(AL.MONO)
afile.setsampwidth(AL.SAMPLE_8)
params = [AL.INPUT_RATE, 0]
al.getparams(AL.DEFAULT_DEVICE, params)
print 'audio sampling rate =', params[1]
afile.setframerate(params[1])
c = al.newconfig()
c.setchannels(AL.MONO)
c.setqueuesize(AQSIZE)
c.setwidth(AL.SAMPLE_8)
aport = al.openport(filename, 'r', c)
thread.start_new_thread(audiorecord, (afile, aport, stop, start, done))
# Thread to record audio samples
def audiorecord(afile, aport, stop, start, done):
start.release_lock()
leeway = 4
while leeway > 0:
if stop:
leeway = leeway - 1
data = aport.readsamps(AQSIZE/8)
afile.writesampsraw(data)
del data
afile.close()
print 'Done writing audio'
done.release_lock()
# Don't forget to call the main program
try:
main()
except KeyboardInterrupt:
print '[Interrupt]'