#!/bin/bash
## Anime Studio preview render nautilus script.
## version 0.3.2 (090120)
## Created by David Rylander, 2009, www.rylanderanimation.se
## Creative Commons Attribution-Share Alike 3.0 licenced (http://creativecommons.org/licenses/by-sa/3.0/)
## Dependencies of this script; Anime Studio Pro, FFmpeg, Sox.

##### Variables #####
mypath="`pwd`"  #get current path.

for filename in "$@"
do
origstartframe=$(grep frame_range "$mypath/$filename" | cut -d ' ' -f 2)
origendframe=$(grep frame_range "$mypath/$filename" | cut -d ' ' -f 3)
fps=$(grep fps "$mypath/$filename" | cut -d ' ' -f 2)
fpsdecimal=`echo "1 / $fps" | bc -l`
soundpath=$(grep soundtrack "$mypath/$filename" | cut -d ' ' -f 2 | sed 's/"//g')
done

#TODO, kolla om bara en fil är vald och om denna har .anme ändelse. Annars avbryt.

##### Create temp-folder #####
if [ ! -d preview-temp ]
then
   mkdir preview-temp
fi
sleep 1

##### User set custom frame range. #####
startframe=$(zenity --entry --text "startframe:" --entry-text $origstartframe);
endframe=$(zenity --entry --text "endframe:" --entry-text $origendframe);

##### Render AS-file. #####
for filename in "$@"
do
/usr/local/bin/AnimeStudioPro_5.6/AnimeStudioPro -r "$mypath/$filename" -start $startframe -end $endframe -f PNG -halfsize yes -o $mypath/preview-temp/preview-render_.png
done 

##### Check if soundtrack exists where it should be. #####
for filename in "$@"
do
if [ -z $soundpath ];
then
soundtrack=""
elif [ -e $mypath/$soundpath ];
     then
soundtrack=$mypath/$soundpath
elif [ -e $soundpath ];
then
soundtrack=$soundpath
else
soundtrack=""  #if we can't find the audio in specified path (i.e is windows path)
fi
done

##### Get length, padding and trimming. #####
for filename in "$@"
do
if [ $startframe = $origstartframe ];
then
pad1=0
trim1=0
elif [ $startframe -gt $origstartframe ];
then
startcrop=`echo "($startframe - $origstartframe) * $fpsdecimal" | bc -l`
pad1=0
trim1=$startcrop
elif [ $startframe -lt $origstartframe ];
then
startpad=`echo "($origstartframe - $startframe) * $fpsdecimal" | bc -l`
pad1=$startpad
trim1=0
fi
done

audlength=`echo "($endframe - $startframe) * $fpsdecimal" | bc -l`

for filename in "$@"
do
if [ $endframe = $origendframe ];
then
pad2=0
trim2=$audlength
elif [ $endframe -gt $origendframe ];
then
endpad=`echo "($endframe - $origendframe) * $fpsdecimal" | bc -l`
pad2=$endpad
trim2=$audlength
elif [ $endframe -lt $origendframe ];
then
endcrop=`echo "($origendframe - $endframe) * $fpsdecimal" | bc -l`
pad2=0
trim2=`echo "$audlength - $endcrop" | bc -l`
fi
done

##### Render audio #####
for filename in "$@"
do
if [  $soundtrack != "" ]; then
sox $soundtrack $mypath/preview-temp/audio-temp.wav pad $pad1 $pad2 trim $trim1 $trim2
tempaudio="-i $mypath/preview-temp/audio-temp.wav"
else
tempaudio=""
fi
done

##### Renumber image sequence to start with #0001 #####
if [ ! -e $mypath/preview-temp/preview-render_0001.png ];
     then
     
cd $mypath/preview-temp/
sleep 1  #behövs lite paus annars missar omnumreringen filerna...
(
 for f in * 
  do
    currprefix=${f%[0-9][0-9][0-9][0-9]*}
    test "x$prevprefix" = "x$currprefix" && ((i++)) || i=1
   mv -i "$f" "${f/[0-9][0-9][0-9][0-9]/$(printf %04d $i)}"
    prevprefix=$currprefix
  done
)
cd ..

     fi

##### Render image sequence and audio to video file. #####
ffmpeg  -qmax 5 $tempaudio -i $mypath/preview-temp/preview-render_%04d.png -vcodec mpeg4 -r $fps -y preview-render.mp4

##### Clean and make tidy. #####
rm -rf $mypath/preview-temp/

echo "Animation preview rendered!"| zenity --title AS-preview-render --text-info