avformat/iamf: replace av_assert0(0) with av_unreachable

Signed-off-by: James Almer <jamrial@gmail.com>

libavformat/iamf_parse.c

@@ -916,7 +916,7 @@ static int audio_element_obu(void *s, IAMFContext *c, AVIOContext *pb, int len)
         if (ret < 0)
             goto fail;
     } else {
-        av_assert0(0);
+        av_unreachable("audio_element_type should have been checked above");
     }
 
     c->audio_elements[c->nb_audio_elements++] = audio_element;

libavformat/iamf_reader.c

@@ -257,7 +257,7 @@ static int parameter_block_obu(AVFormatContext *s, IAMFDemuxContext *c,
             break;
         }
         default:
-            av_assert0(0);
+            av_unreachable("param_definition_type should have been checked in descriptor");
         }
     }
 
@@ -290,7 +290,7 @@ static int parameter_block_obu(AVFormatContext *s, IAMFDemuxContext *c,
         c->recon_size = out_param_size;
         break;
     default:
-        av_assert0(0);
+        av_unreachable("param_definition_type should have been checked in descriptor");
     }
 
     ret = 0;

libavformat/iamf_writer.c

@@ -1146,7 +1146,7 @@ static int write_parameter_block(const IAMFContext *iamf, AVIOContext *pb,
             break;
         }
         default:
-            av_assert0(0);
+            av_unreachable("param_definition_type should have been checked above");
         }
     }