Add Cinepak encoder

With permission of Tomas Härdin applied by Rl aetey.se
Signed-off-by: Diego Biurrun <diego@biurrun.de>

Changelog

@@ -16,6 +16,7 @@ version <next>:
 - FM Screen Capture Codec decoder
 - ClearVideo decoder (I-frames only)
 - support for decoding through D3D11VA in avconv
+- Cinepak encoder
 
 
 version 12:

doc/general.texi

@@ -631,7 +631,7 @@ following image formats are supported:
     @tab Codec used in Delphine Software International games.
 @item Discworld II BMV Video @tab     @tab  X
 @item Canopus Lossless Codec @tab     @tab  X
-@item Cinepak                @tab     @tab  X
+@item Cinepak                @tab  X  @tab  X
 @item Cirrus Logic AccuPak   @tab  X  @tab  X
     @tab fourcc: CLJR
 @item Creative YUV (CYUV)    @tab     @tab  X

libavcodec/Makefile

@@ -186,6 +186,7 @@ OBJS-$(CONFIG_CDGRAPHICS_DECODER)      += cdgraphics.o
 OBJS-$(CONFIG_CDXL_DECODER)            += cdxl.o
 OBJS-$(CONFIG_CFHD_DECODER)            += cfhd.o cfhddata.o
 OBJS-$(CONFIG_CINEPAK_DECODER)         += cinepak.o
+OBJS-$(CONFIG_CINEPAK_ENCODER)         += cinepakenc.o
 OBJS-$(CONFIG_CLEARVIDEO_DECODER)      += clearvideo.o
 OBJS-$(CONFIG_CLJR_DECODER)            += cljrdec.o
 OBJS-$(CONFIG_CLJR_ENCODER)            += cljrenc.o

libavcodec/allcodecs.c

@@ -133,7 +133,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER(CDGRAPHICS,        cdgraphics);
     REGISTER_DECODER(CDXL,              cdxl);
     REGISTER_DECODER(CFHD,              cfhd);
-    REGISTER_DECODER(CINEPAK,           cinepak);
+    REGISTER_ENCDEC (CINEPAK,           cinepak);
     REGISTER_DECODER(CLEARVIDEO,        clearvideo);
     REGISTER_ENCDEC (CLJR,              cljr);
     REGISTER_DECODER(CLLC,              cllc);