mirror of https://github.com/python/cpython
Revived the old aplay tool which can play synchronous audio and video...
This commit is contained in:
Guido van Rossum
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c5a14331a0
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#! /ufs/guido/bin/sgi/python
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# Play synchronous video and audio.
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# Highly experimental!
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import sys
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import getopt
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import string
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import os
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import VFile
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import aifc
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import gl, GL, DEVICE
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import al, AL
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def usage():
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sys.stderr.write( \
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'usage: aplay [-o offset] [-q qsize] videofile audiofile\n')
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sys.exit(2)
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def main():
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offset = 0
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qsize = 0 # This defaults to 1/10 second of sound
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videofile = 'film.video'
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audiofile = 'film.aiff'
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try:
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opts, args = getopt.getopt(sys.argv[1:], 'o:q:')
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except getopt.error, msg:
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sys.stderr.write(msg + '\n')
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usage()
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try:
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for o, a in opts:
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if o == '-o':
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offset = string.atoi(a)
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if o == '-q':
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qsize = string.atoi(a)
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except string.atoi_error:
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sys.stderr.write(o + ' arg must be integer\n')
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usage()
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if len(args) > 2:
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usage()
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if args: videofile = args[0]
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if args[1:]: audiofile = args[1]
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if not os.path.exists(videofile) and \
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os.path.exists(videofile + '.video'):
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if not args[1:] and os.path.exists(videofile + '.aiff'):
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audiofile = videofile + '.aiff'
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videofile = videofile + '.video'
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print 'Opening video input file..'
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vin = VFile.VinFile().init(videofile)
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print 'Opening audio input file..'
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ain = aifc.open(audiofile, 'r')
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print 'rate :', ain.getframerate()
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print 'channels:', ain.getnchannels()
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print 'frames :', ain.getnframes()
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print 'width :', ain.getsampwidth()
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print 'kbytes :', \
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ain.getnframes() * ain.getnchannels() * ain.getsampwidth()
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print 'Opening audio output port..'
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c = al.newconfig()
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c.setchannels(ain.getnchannels())
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c.setwidth(ain.getsampwidth())
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nullsample = '\0' * ain.getsampwidth()
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samples_per_second = ain.getnchannels() * ain.getframerate()
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if qsize <= 0: qsize = samples_per_second / 10
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qsize = max(qsize, 512)
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c.setqueuesize(qsize)
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saveparams = [AL.OUTPUT_RATE, 0]
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al.getparams(AL.DEFAULT_DEVICE, saveparams)
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newparams = [AL.OUTPUT_RATE, ain.getframerate()]
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al.setparams(AL.DEFAULT_DEVICE, newparams)
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aport = al.openport(audiofile, 'w', c)
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print 'Opening video output window..'
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gl.foreground()
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gl.prefsize(vin.width, vin.height)
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wid = gl.winopen(videofile + ' + ' + audiofile)
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gl.clear()
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vin.initcolormap()
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print 'Playing..'
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gl.qdevice(DEVICE.ESCKEY)
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gl.qdevice(DEVICE.LEFTARROWKEY)
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gl.qdevice(DEVICE.RIGHTARROWKEY)
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## gl.qdevice(DEVICE.UPARROWKEY)
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## gl.qdevice(DEVICE.DOWNARROWKEY)
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gl.qdevice(DEVICE.SPACEKEY)
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while 1:
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samples_written = 0
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samples_read = 0
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lastt = 0
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pause = 0
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while 1:
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if gl.qtest():
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dev, val = gl.qread()
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if val == 1:
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if dev == DEVICE.ESCKEY:
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sys.exit(0)
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elif dev == DEVICE.LEFTARROWKEY:
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offset = offset - 100
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print 'offset =', offset
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elif dev == DEVICE.RIGHTARROWKEY:
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offset = offset + 100
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print 'offset =', offset
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elif dev == DEVICE.SPACEKEY:
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pause = (not pause)
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if pause:
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continue
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try:
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t, data, cdata = vin.getnextframe()
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except EOFError:
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break
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t = int(t)
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dt = t - lastt
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lastt = t
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target = samples_per_second * t / 1000
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n = target - samples_written + qsize - offset
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if n > 0:
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# This call will block until the time is right:
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try:
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samples = ain.readframes(n)
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except EOFError:
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samples = ''
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k = len(samples) / len(nullsample)
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samples_read = samples_read + k
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if k < n:
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samples = samples + (n-k) * nullsample
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aport.writesamps(samples)
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samples_written = samples_written + n
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vin.showframe(data, cdata)
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while 1:
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try:
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samples = ain.readframes(qsize)
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except EOFError:
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break
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if not samples:
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break
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aport.writesamps(samples)
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k = len(samples) / len(nullsample)
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samples_read = samples_read + k
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samples_written = samples_written + k
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print samples_read, 'samples ==',
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print samples_read * 1.0 / samples_per_second, 'sec.'
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print lastt, 'milliseconds'
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print 'Restarting..'
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ain.close()
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ain = aifc.open(audiofile, 'r')
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vin.rewind()
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main()
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