generate_http_content.sh.in

#!/bin/sh
# generate 'video content' with various on/off periods and various bitrates

# on/off period length in seconds
PERIODS="@PERIODS@"

# bitrates in kpbs
BRATES="@BRATES@"

# video duration in seconds
DURATION="@DURATION@"

for P in $PERIODS; do
	for R in $BRATES; do
		mkdir -p video_files-${P}-${R}

		if [ ! -e video_files-${P}-${R}/0 ] ; then
			# generate file for prefetch (assume max of 60 seconds)
                	PREFETCH_SIZE=`echo "60 ${R}" | awk '{ printf("%.0f", $1 * $2 * 1000 / 8) }'`
                	dd if=/dev/zero of=video_files-${P}-${R}/0 bs=${PREFETCH_SIZE} count=1 2> /dev/null;
		fi

		if [ -e video_files-${P}-${R}/1 ] ; then	
			SIZE=`ls -l video_files-${P}-${R}/1 | awk '{ print $5 }'`
		else
			SIZE=-1
		fi

		# chunk size in bytes 
		CHUNK_SIZE=`echo "${P} ${R}" | awk '{ printf("%.0f", $1 * $2 * 1000 / 8) }'`
		if [ ${CHUNK_SIZE} -ne ${SIZE} ] ; then
			# number of chunks
			CHUNK_CNT=`echo "${P} ${DURATION}" | awk '{ printf("%.0f", $2 / $1 ) }'`
			for J in `seq 1 $CHUNK_CNT`; do
				dd if=/dev/zero of=video_files-${P}-${R}/${J} bs=${CHUNK_SIZE} count=1 2> /dev/null; 
			done;
		fi;
	done;
done;