codec: add package comments to codec packages

codec/h264/extract.go

@@ -24,6 +24,7 @@ LICENSE
   You should have received a copy of the GNU General Public License
   along with revid in gpl.txt. If not, see http://www.gnu.org/licenses.
 */
+
 package h264
 
 import (

codec/h264/h264dec/decode.go

@@ -22,6 +22,7 @@ LICENSE
   in gpl.txt.  If not, see http://www.gnu.org/licenses.
 */
 
+// Package h264dec provides a decoder for h264 frames.
 package h264dec
 
 import (

codec/h264/h264dec/helpers.go

@@ -5,6 +5,7 @@ DESCRIPTION
 AUTHORS
   Saxon Nelson-Milton <saxon@ausocean.org>, The Australian Ocean Laboratory (AusOcean)
 */
+
 package h264dec
 
 import (

codec/h264/lex_test.go

@@ -26,8 +26,6 @@ LICENSE
   along with revid in gpl.txt. If not, see http://www.gnu.org/licenses.
 */
 
-// lex_test.go provides tests for the lexer in lex.go.
-
 package h264
 
 import (

codec/mjpeg/jpeg.go

@@ -30,6 +30,7 @@ LICENSE
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
 
+// Package mjpeg a lexer and decoder for mjpeg video.
 package mjpeg
 
 import (