Audio: RTNR stub: Add audio_stream_copy() to stub functions

This change avoids with stub library version annoying playback
sound from non-updated sink buffer when the processing ALSA
switch control is enabled. The audio is passed through from
source to sink.

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>

src/audio/rtnr/rtnr.c

@@ -684,8 +684,7 @@ static int rtnr_set_config(struct processing_module *mod, uint32_t param_id,
 #endif
 }
 
-static void rtnr_copy_from_sof_stream(struct audio_stream_rtnr *dst,
-				      struct audio_stream *src)
+void rtnr_copy_from_sof_stream(struct audio_stream_rtnr *dst, struct audio_stream *src)
 {
 
 	dst->size = audio_stream_get_size(src);
@@ -697,8 +696,7 @@ static void rtnr_copy_from_sof_stream(struct audio_stream_rtnr *dst,
 	dst->end_addr = audio_stream_get_end_addr(src);
 }
 
-static void rtnr_copy_to_sof_stream(struct audio_stream *dst,
-				    struct audio_stream_rtnr *src)
+void rtnr_copy_to_sof_stream(struct audio_stream *dst, struct audio_stream_rtnr *src)
 {
 	audio_stream_set_size(dst, src->size);
 	audio_stream_set_avail(dst, src->avail);

src/audio/rtnr/rtnr_stub.c

@@ -6,25 +6,58 @@
 //
 
 #include <sof/audio/rtnr/rtklib/include/RTK_MA_API.h>
+#include <sof/audio/audio_stream.h>
 #include <rtos/alloc.h>
 
+#define RTNR_STUB_CONTEXT_SIZE	42	/* Just some random size to allocate */
+
 void RTKMA_API_S16_Default(void *Context, struct audio_stream_rtnr **sources,
 						struct audio_stream_rtnr *sink, int frames,
 						_Bool ref_active, int in_idx, int ref_idx,
 						int ref_32bits, int ref_shift)
-{}
+{
+	struct audio_stream sof_source;
+	struct audio_stream sof_sink;
+
+	rtnr_copy_to_sof_stream(&sof_source, sources[0]);
+	rtnr_copy_to_sof_stream(&sof_sink, sink);
+	audio_stream_copy(&sof_source, 0, &sof_sink, 0,
+			  frames * audio_stream_get_channels(&sof_sink));
+	rtnr_copy_from_sof_stream(sources[0], &sof_source);
+	rtnr_copy_from_sof_stream(sink, &sof_sink);
+}
 
 void RTKMA_API_S24_Default(void *Context, struct audio_stream_rtnr **sources,
 						struct audio_stream_rtnr *sink, int frames,
 						_Bool ref_active, int in_idx, int ref_idx,
 						int ref_32bits, int ref_shift)
-{}
+{
+	struct audio_stream sof_source;
+	struct audio_stream sof_sink;
+
+	rtnr_copy_to_sof_stream(&sof_source, sources[0]);
+	rtnr_copy_to_sof_stream(&sof_sink, sink);
+	audio_stream_copy(&sof_source, 0, &sof_sink, 0,
+			  frames * audio_stream_get_channels(&sof_sink));
+	rtnr_copy_from_sof_stream(sources[0], &sof_source);
+	rtnr_copy_from_sof_stream(sink, &sof_sink);
+}
 
 void RTKMA_API_S32_Default(void *Context, struct audio_stream_rtnr **sources,
 						struct audio_stream_rtnr *sink, int frames,
 						_Bool ref_active, int in_idx, int ref_idx,
 						int ref_32bits, int ref_shift)
-{}
+{
+	struct audio_stream sof_source;
+	struct audio_stream sof_sink;
+
+	rtnr_copy_to_sof_stream(&sof_source, sources[0]);
+	rtnr_copy_to_sof_stream(&sof_sink, sink);
+	audio_stream_copy(&sof_source, 0, &sof_sink, 0,
+			  frames * audio_stream_get_channels(&sof_sink));
+	rtnr_copy_from_sof_stream(sources[0], &sof_source);
+	rtnr_copy_from_sof_stream(sink, &sof_sink);
+}
 
 void RTKMA_API_First_Copy(void *Context, int SampleRate, int MicCh)
 {}
@@ -40,7 +73,7 @@ void *RTKMA_API_Context_Create(int sample_rate)
 	/* Allocate something, to avoid return NULL and cause error
 	 * in check of success of this.
 	 */
-	return rzalloc(SOF_MEM_ZONE_RUNTIME, 0, SOF_MEM_CAPS_RAM, 42);
+	return rzalloc(SOF_MEM_ZONE_RUNTIME, 0, SOF_MEM_CAPS_RAM, RTNR_STUB_CONTEXT_SIZE);
 }
 
 void RTKMA_API_Context_Free(void *Context)

src/include/sof/audio/rtnr/rtnr.h

@@ -82,4 +82,8 @@ void rtnr_printf(int a, int b, int c, int d, int e);
 void *rtk_rballoc(unsigned int flags, unsigned int caps, unsigned int bytes);
 void rtk_rfree(void *ptr);
 
+/* For stub processing functions */
+void rtnr_copy_from_sof_stream(struct audio_stream_rtnr *dst, struct audio_stream *src);
+void rtnr_copy_to_sof_stream(struct audio_stream *dst, struct audio_stream_rtnr *src);
+
 #endif /* __SOF_AUDIO_RTNR_RTNR_H__ */