lifthrasiir/bms2html5.py

## bms2html5.py
import sys, os, urllib

wavs = {}
lines = {}
linesln = {}
stretches = {}
bpm = 120.0
maxpos = 0
precision = 1 << 16
for l in open(sys.argv[1], 'r'):
    if l.lower().startswith('#bpm '):
        bpm = float(l[5:])
    elif l.lower().startswith('#wav'):
        id = l[4:6].lower()
        path = l[7:].strip()
        if os.path.exists(path):
            wavs[id] = path
        elif os.path.exists(path[:-4] + '.ogg'):
            wavs[id] = path[:-4] + '.ogg'
        elif os.path.exists(path[:-4] + '.mp3'):
            wavs[id] = path[:-4] + '.mp3'
        else:
            if id in wavs: del wavs[id]
    elif l.startswith('#') and l[1:4].isdigit():
        pos = int(l[1:4], 10)
        if pos > maxpos: maxpos = pos
        kind = l[4:6].lower()
        data = l[7:].strip()
        if kind in ('01', '11', '12', '13', '14', '15', '16', '17', '18', '19'):
            assert len(data) % 2 == 0
            div = len(data) // 2
            line = lines.setdefault(pos, {})
            for i in xrange(div):
                val = data[i*2:i*2+2].lower()
                if val != '00':
                    line.setdefault(i * precision // div, []).append(val)
        elif kind in ('51', '52', '53', '54', '55', '56', '57', '58', '59'):
            assert len(data) % 2 == 0
            div = len(data) // 2
            line = linesln.setdefault(pos, {})
            for i in xrange(div):
                val = data[i*2:i*2+2].lower()
                if val != '00':
                    line.setdefault(i * precision // div, []).append((val, kind))
        elif kind == '02':
            stretches[pos] = float(data)
        elif kind in ('04', '06'):
            continue
        else:
            print >>sys.stderr, 'unknown kind', kind

# eliminate linesln
active = set()
for pos in xrange(maxpos+1):
    for k, v in linesln.get(pos, {}).items():
        for i, kind in v:
            if kind in active:
                active.remove(kind)
            else:
                lines.setdefault(pos, {}).setdefault(k, []).append(i)
                active.add(kind)

wavsorder = []
seenwavs = set()
for pos in xrange(maxpos+1):
    for k, v in lines.get(pos, {}).items():
        for i in v:
            if i not in seenwavs:
                seenwavs.add(i)
                wavsorder.append(i)

limits = 9999
#limits = 200
moreoptions = ''
#moreoptions = 'controls'

print '<!doctype html>'
print '<div id=q></div>'
print '<button id=r disabled onclick="play();return false">Play</button><br/>'
print '<script>'
print 'var canplay = 0, mustplay = 0;'
print 'function t(x){document.getElementById("q").innerHTML=x}'
print 'function c(x){x.oncanplaythrough="";t("loaded: "+(++canplay)+"/"+mustplay);if(canplay==mustplay)document.getElementById("r").disabled=false}'
print 'function setup(w,x){var st=(+new Date)+x,z;setTimeout(function(){z=(+new Date)-st;t("playing: time="+x+" latency="+z);/*z/=1000;*/z=0;for(var i=0;i<w.length;++i)if(w[i]){w[i].currentTime=z;w[i].play()}},x)}'
print 't("loading...");'
a = 0
for k in wavsorder:
    try:
        v = wavs[k]
    except KeyError:
        continue
    if a < limits:
        print '++mustplay;</script><audio id=w{} src="{}" {} oncanplaythrough="c(this)"></audio><script>w{} = document.getElementById("w{}");'.format(k, urllib.quote(v), moreoptions, k, k)
    else:
        print 'w{} = null;'.format(k)
    a += 1
print 'function play(){'
time = 0.0
for pos in xrange(maxpos+1):
    stretch = stretches.get(pos, 1.0)
    dur = 240.0 / bpm * stretch
    base = time * 1000.0
    mult = dur / float(precision) * 1000.0
    for k, v in lines.get(pos, {}).items():
        print 'setup([{}],{});'.format(','.join('w{}'.format(i) for i in v), int(base + mult * k))
    time += dur
print '}</script>'
	import sys, os, urllib

	wavs = {}
	lines = {}
	linesln = {}
	stretches = {}
	bpm = 120.0
	maxpos = 0
	precision = 1 << 16
	for l in open(sys.argv[1], 'r'):
	if l.lower().startswith('#bpm '):
	bpm = float(l[5:])
	elif l.lower().startswith('#wav'):
	id = l[4:6].lower()
	path = l[7:].strip()
	if os.path.exists(path):
	wavs[id] = path
	elif os.path.exists(path[:-4] + '.ogg'):
	wavs[id] = path[:-4] + '.ogg'
	elif os.path.exists(path[:-4] + '.mp3'):
	wavs[id] = path[:-4] + '.mp3'
	else:
	if id in wavs: del wavs[id]
	elif l.startswith('#') and l[1:4].isdigit():
	pos = int(l[1:4], 10)
	if pos > maxpos: maxpos = pos
	kind = l[4:6].lower()
	data = l[7:].strip()
	if kind in ('01', '11', '12', '13', '14', '15', '16', '17', '18', '19'):
	assert len(data) % 2 == 0
	div = len(data) // 2
	line = lines.setdefault(pos, {})
	for i in xrange(div):
	val = data[i2:i2+2].lower()
	if val != '00':
	line.setdefault(i * precision // div, []).append(val)
	elif kind in ('51', '52', '53', '54', '55', '56', '57', '58', '59'):
	assert len(data) % 2 == 0
	div = len(data) // 2
	line = linesln.setdefault(pos, {})
	for i in xrange(div):
	val = data[i2:i2+2].lower()
	if val != '00':
	line.setdefault(i * precision // div, []).append((val, kind))
	elif kind == '02':
	stretches[pos] = float(data)
	elif kind in ('04', '06'):
	continue
	else:
	print >>sys.stderr, 'unknown kind', kind

	# eliminate linesln
	active = set()
	for pos in xrange(maxpos+1):
	for k, v in linesln.get(pos, {}).items():
	for i, kind in v:
	if kind in active:
	active.remove(kind)
	else:
	lines.setdefault(pos, {}).setdefault(k, []).append(i)
	active.add(kind)

	wavsorder = []
	seenwavs = set()
	for pos in xrange(maxpos+1):
	for k, v in lines.get(pos, {}).items():
	for i in v:
	if i not in seenwavs:
	seenwavs.add(i)
	wavsorder.append(i)

	limits = 9999
	#limits = 200
	moreoptions = ''
	#moreoptions = 'controls'

	print '<!doctype html>'
	print '<div id=q></div>'
	print '<button id=r disabled onclick="play();return false">Play</button><br/>'
	print '<script>'
	print 'var canplay = 0, mustplay = 0;'
	print 'function t(x){document.getElementById("q").innerHTML=x}'
	print 'function c(x){x.oncanplaythrough="";t("loaded: "+(++canplay)+"/"+mustplay);if(canplay==mustplay)document.getElementById("r").disabled=false}'
	print 'function setup(w,x){var st=(+new Date)+x,z;setTimeout(function(){z=(+new Date)-st;t("playing: time="+x+" latency="+z);/z/=1000;/z=0;for(var i=0;i<w.length;++i)if(w[i]){w[i].currentTime=z;w[i].play()}},x)}'
	print 't("loading...");'
	a = 0
	for k in wavsorder:
	try:
	v = wavs[k]
	except KeyError:
	continue
	if a < limits:
	print '++mustplay;</script><audio id=w{} src="{}" {} oncanplaythrough="c(this)"></audio><script>w{} = document.getElementById("w{}");'.format(k, urllib.quote(v), moreoptions, k, k)
	else:
	print 'w{} = null;'.format(k)
	a += 1
	print 'function play(){'
	time = 0.0
	for pos in xrange(maxpos+1):
	stretch = stretches.get(pos, 1.0)
	dur = 240.0 / bpm * stretch
	base = time * 1000.0
	mult = dur / float(precision) * 1000.0
	for k, v in lines.get(pos, {}).items():
	print 'setup([{}],{});'.format(','.join('w{}'.format(i) for i in v), int(base + mult * k))
	time += dur
	print '}</script>'