#!/usr/bin/python
# -*- coding: latin1 -*-

### Copyright (C) 2007-10 Damon Lynch <damonlynch@gmail.com>

### This program is free software; you can redistribute it and/or modify
### it under the terms of the GNU General Public License as published by
### the Free Software Foundation; either version 2 of the License, or
### (at your option) any later version.

### This program is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
### GNU General Public License for more details.

### You should have received a copy of the GNU General Public License
### along with this program; if not, write to the Free Software
### Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

DOWNLOAD_VIDEO = True

import os
import datetime
import subprocess
import tempfile

import gtk
import media
import paths
from filmstrip import add_filmstrip

try:
    import kaa.metadata
except ImportError:
    DOWNLOAD_VIDEO = False

VIDEO_THUMBNAIL_FILE_EXTENSIONS = ['thm']
VIDEO_FILE_EXTENSIONS = ['avi', 'mov', 'mp4', 'mpg']

   

if DOWNLOAD_VIDEO:
    
    
    try:
        subprocess.check_call(["ffmpegthumbnailer", "-h"], stdout=subprocess.PIPE)
        ffmpeg = True
    except:
        ffmpeg = False

    
    def version_info():
        return str(kaa.metadata.VERSION)
        
    def get_video_THM_file(fullFileName):
        """
        Checks to see if a thumbnail file (THM) is in the same directory as the 
        file. Expects a full path to be part of the file name.
        
        Returns the filename, including path, if found, else returns None.
        """
        
        f = None
        name, ext = os.path.splitext(fullFileName)
        for e in VIDEO_THUMBNAIL_FILE_EXTENSIONS:
            if os.path.exists(name + '.' + e):
                f = name + '.' + e
                break
            if os.path.exists(name + '.' + e.upper()):
                f = name + '.' + e.upper()
                break
            
        return f        
    
    class VideoMetaData():
        def __init__(self, filename):
            self.info = kaa.metadata.parse(filename)
            self.filename = filename
            
        def rpd_keys(self):
            return self.info.keys()
            
        def _get(self, key, missing, stream=None):
            if stream != None:
                v = self.info['video'][stream][key]
            else:
                v = self.info[key]
            if v:
                return str(v)
            else:
                return missing
            
        def dateTime(self, missing=''):
            dt = self._get('timestamp', missing=None)
            if dt:
                try:
                    return datetime.datetime.fromtimestamp(self.info['timestamp'])
                except:
                    return missing
            else:
                return missing
                
        def timeStamp(self, missing=''):
            """
            Returns a float value representing the time stamp, if it exists
            """
            v = self._get('timestamp', missing=missing)
            try:
                v = float(v)
            except:
                v = missing
            return v
            
        def codec(self, stream=0, missing=''):
            return self._get('codec', missing, stream)
            
        def length(self, missing=''):
            l = self._get('length', missing)
            try:
                l = '%.0f' % float(l)
            except:
                pass
            return l
            
        def width(self, stream=0, missing=''):
            return self._get('width', missing, stream)
            
        def height(self, stream=0, missing=''):
            return self._get('height', missing, stream)
            
        def framesPerSecond(self, stream=0, missing=''):
            fps = self._get('fps', missing, stream)
            try:
                fps = '%.0f' % float(fps)
            except:
                pass
            return fps
        
        def fourcc(self, stream=0, missing=''):
            return self._get('fourcc', missing, stream)
            
        def getThumbnailData(self, size, tempWorkingDir):
            """
            Returns a pixbuf of the video's thumbnail
            
            If it cannot be created, returns None
            """
            thm = get_video_THM_file(self.filename)
            if thm:
                thumbnail = gtk.gdk.pixbuf_new_from_file(thm)
                aspect = float(thumbnail.get_height()) / thumbnail.get_width()
                thumbnail = thumbnail.scale_simple(size, int(aspect*size), gtk.gdk.INTERP_BILINEAR)
                thumbnail = add_filmstrip(thumbnail)
            else:
                if ffmpeg:
                    try:
                        tmp = tempfile.NamedTemporaryFile(dir=tempWorkingDir, prefix="rpd-tmp")
                        tmp.close()
                    except:
                        return None
                    
                    thm = os.path.join(tempWorkingDir, tmp.name)
                    
                    try:
                        subprocess.check_call(['ffmpegthumbnailer', '-i', self.filename, '-t', '10', '-f', '-o', thm, '-s', str(size)])
                        thumbnail = gtk.gdk.pixbuf_new_from_file_at_size(thm,  size,  size)
                        os.unlink(thm)
                    except:
                        thumbnail = None                    
                else:
                    thumbnail = None
            return thumbnail
        
class DummyMetaData():
    """
    Class which gives metadata values for an imaginary video.
    
    Useful for displaying in preference examples etc. when no video is ready to
    be downloaded.
    
    See VideoMetaData class for documentation of class methods.        
    """
    def __init__(self):
        pass        
    
    def dateTime(self, missing=''):
        return datetime.datetime.now()
        
    def codec(self, stream=0, missing=''):
        return 'H.264 AVC'
        
    def length(self, missing=''):
        return '57'
        
    def width(self, stream=0, missing=''):
        return '1920'
        
    def height(self, stream=0, missing=''):
        return '1080'
        
    def framesPerSecond(self, stream=0, missing=''):
        return '24'
    
    def fourcc(self, stream=0, missing=''):
        return 'AVC1'
                    
            
if __name__ == '__main__':
    import sys
    
    
    if (len(sys.argv) != 2):
        print 'Usage: ' + sys.argv[0] + ' path/to/video/containing/metadata'
        sys.exit(0)

    else:
        m = VideoMetaData(sys.argv[1])
        dt = m.dateTime()
        if dt:
            print dt.strftime('%Y%m%d-%H:%M:%S')
        print "codec: %s" % m.codec()
        print "%s seconds" % m.length()
        print "%sx%s" % (m.width(), m.height())
        print "%s fps" % m.framesPerSecond()
        print "Fourcc: %s" % (m.fourcc())