refactor: Convert some portion of code to rust

Code contains flushing the active decoders of `dtvcc_rust`

Author: IshanGrover2004

src/lib_ccx/ccx_decoders_common.c

@@ -17,7 +17,7 @@ made to reuse, not duplicate, as many functions as possible */
 
 #ifndef DISABLE_RUST
 extern int ccxr_process_cc_data(struct lib_cc_decode *dec_ctx, unsigned char *cc_data, int cc_count);
-extern void ccxr_flush_decoder(struct dtvcc_ctx *dtvcc, struct dtvcc_service_decoder *decoder);
+extern void ccxr_flush_decoder(void *dtvcc_rust, struct dtvcc_service_decoder *decoder);
 #endif
 
 uint64_t utc_refvalue = UINT64_MAX; /* _UI64_MAX/UINT64_MAX means don't use UNIX, 0 = use current system time as reference, +1 use a specific reference */
@@ -449,6 +449,9 @@ void flush_cc_decode(struct lib_cc_decode *ctx, struct cc_subtitle *sub)
 			}
 		}
 	}
+#ifndef DISABLE_RUST
+	ccxr_flush_active_decoders(ctx);
+#else
 	if (ctx->dtvcc->is_active)
 	{
 		for (int i = 0; i < CCX_DTVCC_MAX_SERVICES; i++)
@@ -459,14 +462,11 @@ void flush_cc_decode(struct lib_cc_decode *ctx, struct cc_subtitle *sub)
 			if (decoder->cc_count > 0)
 			{
 				ctx->current_field = 3;
-#ifndef DISABLE_RUST
-				ccxr_flush_decoder(ctx->dtvcc, decoder);
-#else
 				dtvcc_decoder_flush(ctx->dtvcc, decoder);
-#endif
 			}
 		}
 	}
+#endif
 }
 struct encoder_ctx *copy_encoder_context(struct encoder_ctx *ctx)
 {

src/lib_ccx/ccx_decoders_common.h

@@ -32,4 +32,8 @@ struct cc_subtitle* copy_subtitle(struct cc_subtitle *sub);
 void free_encoder_context(struct encoder_ctx *ctx);
 void free_decoder_context(struct lib_cc_decode *ctx);
 void free_subtitle(struct cc_subtitle* sub);
+#ifndef DISABLE_RUST
+void ccxr_flush_active_decoders(struct lib_cc_decode *ctx);
+#endif // !DISABLE_RUST
+
 #endif