avcodec/dpx: make .long_name more descriptive

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavcodec/codec_desc.c

@@ -950,7 +950,7 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .id        = AV_CODEC_ID_DPX,
         .type      = AVMEDIA_TYPE_VIDEO,
         .name      = "dpx",
-        .long_name = NULL_IF_CONFIG_SMALL("DPX image"),
+        .long_name = NULL_IF_CONFIG_SMALL("DPX (Digital Picture Exchange) image"),
         .props     = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
     },
     {

libavcodec/dpx.c

@@ -270,7 +270,7 @@ static int decode_frame(AVCodecContext *avctx,
 
 AVCodec ff_dpx_decoder = {
     .name           = "dpx",
-    .long_name      = NULL_IF_CONFIG_SMALL("DPX image"),
+    .long_name      = NULL_IF_CONFIG_SMALL("DPX (Digital Picture Exchange) image"),
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_DPX,
     .decode         = decode_frame,

libavcodec/dpxenc.c

@@ -235,7 +235,7 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
 
 AVCodec ff_dpx_encoder = {
     .name           = "dpx",
-    .long_name      = NULL_IF_CONFIG_SMALL("DPX image"),
+    .long_name      = NULL_IF_CONFIG_SMALL("DPX (Digital Picture Exchange) image"),
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_DPX,
     .priv_data_size = sizeof(DPXContext),