Add ClearVideo decoder

Only I-frames are decoded for now.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

Changelog

@@ -14,6 +14,7 @@ version <next>:
 - Cineform HD decoder
 - VP9 superframe split/merge bitstream filters
 - FM Screen Capture Codec decoder
+- ClearVideo decoder (I-frames only)
 
 
 version 12:

doc/general.texi

@@ -703,6 +703,8 @@ following image formats are supported:
     @tab Used in the game Cyberia from Interplay.
 @item Interplay MVE video    @tab     @tab  X
     @tab Used in Interplay .MVE files.
+@item Iterated Systems ClearVideo @tab     @tab  X
+    @tab I-frames only
 @item Karl Morton's video codec  @tab     @tab  X
     @tab Codec used in Worms games.
 @item Kega Game Video (KGV1) @tab      @tab  X

libavcodec/Makefile

@@ -183,6 +183,7 @@ 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-$(CONFIG_CLEARVIDEO_DECODER)      += clearvideo.o
 OBJS-$(CONFIG_CLJR_DECODER)            += cljrdec.o
 OBJS-$(CONFIG_CLJR_ENCODER)            += cljrenc.o
 OBJS-$(CONFIG_CLLC_DECODER)            += cllc.o canopus.o

libavcodec/allcodecs.c

@@ -129,6 +129,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER(CDXL,              cdxl);
     REGISTER_DECODER(CFHD,              cfhd);
     REGISTER_DECODER(CINEPAK,           cinepak);
+    REGISTER_DECODER(CLEARVIDEO,        clearvideo);
     REGISTER_ENCDEC (CLJR,              cljr);
     REGISTER_DECODER(CLLC,              cllc);
     REGISTER_ENCDEC (COMFORTNOISE,      comfortnoise);

libavcodec/avcodec.h

@@ -409,6 +409,7 @@ enum AVCodecID {
     AV_CODEC_ID_PIXLET,
     AV_CODEC_ID_CFHD,
     AV_CODEC_ID_FMVC,
+    AV_CODEC_ID_CLEARVIDEO,
 
     /* various PCM "codecs" */
     AV_CODEC_ID_FIRST_AUDIO = 0x10000,     ///< A dummy id pointing at the start of audio codecs

libavcodec/codec_desc.c

@@ -1217,6 +1217,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .long_name = NULL_IF_CONFIG_SMALL("FM Screen Capture Codec"),
         .props     = AV_CODEC_PROP_LOSSLESS,
     },
+    {
+        .id        = AV_CODEC_ID_CLEARVIDEO,
+        .type      = AVMEDIA_TYPE_VIDEO,
+        .name      = "clearvideo",
+        .long_name = NULL_IF_CONFIG_SMALL("Iterated Systems ClearVideo"),
+        .props     = AV_CODEC_PROP_LOSSY,
+    },
 
     /* image codecs */
     {

libavcodec/version.h

@@ -28,7 +28,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 58
-#define LIBAVCODEC_VERSION_MINOR  2
+#define LIBAVCODEC_VERSION_MINOR  3
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

libavformat/riff.c

@@ -375,6 +375,8 @@ const AVCodecTag ff_codec_bmp_tags[] = {
     { AV_CODEC_ID_AV1,          MKTAG('A', 'V', '0', '1') },
     { AV_CODEC_ID_CFHD,         MKTAG('C', 'F', 'H', 'D') },
     { AV_CODEC_ID_FMVC,         MKTAG('F', 'M', 'V', 'C') },
+    { AV_CODEC_ID_CLEARVIDEO,   MKTAG('U', 'C', 'O', 'D') },
+
     { AV_CODEC_ID_NONE,         0 }
 };
 

libavformat/rm.c

@@ -43,5 +43,6 @@ const AVCodecTag ff_rm_codec_tags[] = {
     { AV_CODEC_ID_AAC,    MKTAG('r','a','a','c') },
     { AV_CODEC_ID_AAC,    MKTAG('r','a','c','p') },
     { AV_CODEC_ID_RALF,   MKTAG('L','S','D',':') },
+    { AV_CODEC_ID_CLEARVIDEO, MKTAG('C','L','V','1') },
     { AV_CODEC_ID_NONE },
 };