avcodec: add IMM4 decoder

This work is sponsored by VideoLAN.

Changelog

@@ -17,6 +17,7 @@ version <next>:
 - lensfun wrapper filter
 - colorconstancy filter
 - AVS2 video decoder via libdavs2
+- IMM4 video decoder
 
 
 version 4.0:

libavcodec/Makefile

@@ -385,6 +385,7 @@ OBJS-$(CONFIG_IDCIN_DECODER)           += idcinvideo.o
 OBJS-$(CONFIG_IDF_DECODER)             += bintext.o cga_data.o
 OBJS-$(CONFIG_IFF_ILBM_DECODER)        += iff.o
 OBJS-$(CONFIG_IMC_DECODER)             += imc.o
+OBJS-$(CONFIG_IMM4_DECODER)            += imm4.o
 OBJS-$(CONFIG_INDEO2_DECODER)          += indeo2.o
 OBJS-$(CONFIG_INDEO3_DECODER)          += indeo3.o
 OBJS-$(CONFIG_INDEO4_DECODER)          += indeo4.o ivi.o

libavcodec/allcodecs.c

@@ -153,6 +153,7 @@ extern AVCodec ff_huffyuv_encoder;
 extern AVCodec ff_huffyuv_decoder;
 extern AVCodec ff_idcin_decoder;
 extern AVCodec ff_iff_ilbm_decoder;
+extern AVCodec ff_imm4_decoder;
 extern AVCodec ff_indeo2_decoder;
 extern AVCodec ff_indeo3_decoder;
 extern AVCodec ff_indeo4_decoder;

libavcodec/avcodec.h

@@ -447,6 +447,7 @@ enum AVCodecID {
     AV_CODEC_ID_SVG,
     AV_CODEC_ID_GDV,
     AV_CODEC_ID_FITS,
+    AV_CODEC_ID_IMM4,
 
     /* various PCM "codecs" */
     AV_CODEC_ID_FIRST_AUDIO = 0x10000,     ///< A dummy id pointing at the start of audio codecs

libavcodec/codec_desc.c

@@ -1654,6 +1654,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .long_name = NULL_IF_CONFIG_SMALL("FITS (Flexible Image Transport System)"),
         .props     = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
     },
+    {
+        .id        = AV_CODEC_ID_IMM4,
+        .type      = AVMEDIA_TYPE_VIDEO,
+        .name      = "imm4",
+        .long_name = NULL_IF_CONFIG_SMALL("Infinity IMM4"),
+        .props     = AV_CODEC_PROP_LOSSY,
+    },
 
     /* various PCM "codecs" */
     {

libavcodec/version.h

@@ -28,7 +28,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  58
-#define LIBAVCODEC_VERSION_MINOR  23
+#define LIBAVCODEC_VERSION_MINOR  24
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

libavformat/riff.c

@@ -470,6 +470,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
     { AV_CODEC_ID_AV1,          MKTAG('A', 'V', '0', '1') },
     { AV_CODEC_ID_MSCC,         MKTAG('M', 'S', 'C', 'C') },
     { AV_CODEC_ID_SRGC,         MKTAG('S', 'R', 'G', 'C') },
+    { AV_CODEC_ID_IMM4,         MKTAG('I', 'M', 'M', '4') },
     { AV_CODEC_ID_NONE,         0 }
 };