regtest: simplify cleanup after each test

Originally committed as revision 24396 to svn://svn.ffmpeg.org/ffmpeg/trunk

tests/codec-regression.sh

@@ -358,5 +358,3 @@ do_audio_enc_dec wav dbl pcm_f64le
 do_audio_enc_dec wav s16 pcm_zork
 do_audio_enc_dec 302 s16 pcm_s24daud "-ac 6 -ar 96000"
 fi
-
-rm -f "$bench" "$bench2"

tests/lavf-regression.sh

@@ -226,5 +226,3 @@ for pix_fmt in $conversions ; do
                     -f rawvideo -s 352x288 -pix_fmt yuv444p
 done
 fi
-
-rm -f "$bench" "$bench2"

tests/lavfi-regression.sh

@@ -97,5 +97,3 @@ fi
 # TODO: add tests for
 # direct rendering,
 # chains with feedback loops
-
-rm -f "$bench" "$bench2"

tests/regression-funcs.sh

@@ -34,6 +34,9 @@ pcm_ref="$datadir/$test_ref.ref.wav"
 crcfile="$datadir/$this.crc"
 target_crcfile="$target_datadir/$this.crc"
 
+cleanfiles="$raw_dst $pcm_dst $crcfile $bench $bench2"
+trap 'rm -f -- $cleanfiles' EXIT
+
 mkdir -p "$datadir"
 mkdir -p "$outfile"
 mkdir -p "$logdir"
@@ -89,7 +92,6 @@ do_ffmpeg_crc()
     $echov $ffmpeg $FFMPEG_OPTS $* -f crc "$target_crcfile"
     $ffmpeg $FFMPEG_OPTS $* -f crc "$target_crcfile"
     echo "$f $(cat $crcfile)" >> $logfile
-    rm -f "$crcfile"
 }
 
 do_ffmpeg_nocheck()
@@ -105,7 +107,6 @@ do_ffmpeg_nocheck()
 do_video_decoding()
 {
     do_ffmpeg $raw_dst $1 -i $target_path/$file -f rawvideo $2
-    rm -f $raw_dst
 }
 
 do_video_encoding()