#!/usr/local/bin/python2.7
##
##  flvaddmp3.py - put an mp3 audio to an existing FLV movie.
##
##  Copyright (c) 2009-2010 by Yusuke Shinyama
##

import sys, os.path, re
from vnc2flv.flv import FLVParser, FLVWriter
from vnc2flv.audio import AudioSink
from vnc2flv.video import MultipleRange


##  mp3add
##
def mp3add(srcfile, mp3files, outfile, force=False, debug=0):
    if not force and os.path.exists(outfile):
        raise IOError('file already exists: %r' % outfile)
    fout = file(outfile, 'wb')
    writer = FLVWriter(fout, debug=debug, has_video=True, has_audio=True)
    fin = file(srcfile, 'rb')
    parser = FLVParser(fin, debug=debug)
    for (i, (tag, _, timestamp, _, _)) in enumerate(parser):
        if tag == 8:
            pass
        elif tag == 9:
            writer.write_video_frame(timestamp, parser.get_data(i))
        elif tag == 18:
            (k,v) = parser.parse_metadata(parser.get_data(i))
            if k == 'onMetaData':
                writer.set_screen_size(v.get('width',0), v.get('height',0))
            else:
                writer.write_other_data(tag, parser.get_data(i))
    parser.close()
    fin.close()
    for fname in mp3files:
        m = re.match(r'([^:]+):(.+)$', fname)
        ranges = None
        if m:
            fname = m.group(1)
            ranges = MultipleRange(m.group(2))
        audio = AudioSink()
        fp = file(fname, 'rb')
        audio.load(fp)
        fp.close()
        if ranges:
            for (_,s,e) in ranges:
                audio.put(writer, s, e, s)
        else:
            audio.put(writer)
    writer.close()
    fout.close()
    return


# main
def main(argv):
    import getopt, vnc2flv
    def usage():
        print argv[0], vnc2flv.__version__
        print ('usage: %s [-d] [-f] input.flv [mp3:range ...] output.flv' % argv[0])
        return 100
    try:
        (opts, args) = getopt.getopt(argv[1:], 'df')
    except getopt.GetoptError:
        return usage()
    debug = 0
    force = False
    for (k, v) in opts:
        if k == '-d': debug += 1
        elif k == '-f': force = True
    if len(args) < 3: return usage()
    srcfile = args.pop(0)
    outfile = args.pop(-1)
    try:
        mp3add(srcfile, args, outfile, force=force, debug=debug)
    except IOError, e:
        print >>sys.stderr, e
    return

if __name__ == "__main__": sys.exit(main(sys.argv))
