avcodec/ac3dec_float: Deduplicate AVClasses

The child_class_next API relied on different AVCodecs to use
different AVClasses; yet this API has been replaced by
child_class_iterate.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/ac3dec_float.c

@@ -46,8 +46,8 @@ static const AVOption options[] = {
     { NULL},
 };
 
-static const AVClass ac3_decoder_class = {
-    .class_name = "AC3 decoder",
+static const AVClass ac3_eac3_decoder_class = {
+    .class_name = "(E-)AC3 decoder",
     .item_name  = av_default_item_name,
     .option     = options,
     .version    = LIBAVUTIL_VERSION_INT,
@@ -66,18 +66,11 @@ const AVCodec ff_ac3_decoder = {
     .long_name      = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
     .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
-    .priv_class     = &ac3_decoder_class,
+    .priv_class     = &ac3_eac3_decoder_class,
     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
 };
 
 #if CONFIG_EAC3_DECODER
-static const AVClass eac3_decoder_class = {
-    .class_name = "E-AC3 decoder",
-    .item_name  = av_default_item_name,
-    .option     = options,
-    .version    = LIBAVUTIL_VERSION_INT,
-};
-
 const AVCodec ff_eac3_decoder = {
     .name           = "eac3",
     .type           = AVMEDIA_TYPE_AUDIO,
@@ -91,7 +84,7 @@ const AVCodec ff_eac3_decoder = {
     .long_name      = NULL_IF_CONFIG_SMALL("ATSC A/52B (AC-3, E-AC-3)"),
     .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
-    .priv_class     = &eac3_decoder_class,
+    .priv_class     = &ac3_eac3_decoder_class,
     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
 };
 #endif