vStream: handle DEVICE and FILENAME registers based on configuration

- this prevents scanning for streaming devices when using file for streaming
- emphasizes behavior: files is used when specified instead of streaming device

Author: VladimirUmek

interface/vstream/source/vstream_audio_in.c

@@ -172,11 +172,11 @@ static int32_t Initialize (vStreamEvent_t event_cb) {
   AudioIn->CONTROL       = 0U;
 
   /* Set audio configuration */
-  AudioIn->DEVICE      = AUDIO_IN_DEVICE;
   AudioIn->CHANNELS    = AUDIO_IN_CHANNELS;
   AudioIn->SAMPLE_BITS = AUDIO_IN_SAMPLE_BITS;
   AudioIn->SAMPLE_RATE = AUDIO_IN_SAMPLE_RATE;
 
+  /* Set filename if specified */
   fn = AUDIO_IN_FILENAME;
   len = strlen(fn);
 
@@ -188,6 +188,15 @@ static int32_t Initialize (vStreamEvent_t event_cb) {
     for (i = 0; i < len; i++) {
       AudioIn->FILENAME = fn[i];
     }
+
+    if ((AudioIn->STATUS & STATUS_FILE_NAME_Msk) == 0U) {
+      /* File not found */
+      return VSTREAM_ERROR;
+    }
+  }
+  else {
+    /* File not specified, set streaming device */
+    AudioIn->DEVICE = AUDIO_IN_DEVICE;
   }
 
   /* Enable peripheral interrupts */

interface/vstream/source/vstream_audio_out.c

@@ -164,15 +164,14 @@ static int32_t Initialize (vStreamEvent_t event_cb) {
   hAudioOut.eos       = 0U;
   hAudioOut.flags     = 0U;
 
-  /* Initialize Audio Input peripheral */
+  /* Initialize Audio Output peripheral */
   AudioOut->Timer.Control = 0U;
   AudioOut->DMA.Control   = 0U;
   AudioOut->IRQ.Clear     = IRQ_TIMER_OVERFLOW_Msk;
   AudioOut->IRQ.Enable    = IRQ_TIMER_OVERFLOW_Msk;
   AudioOut->CONTROL       = CONTROL_MODE_Msk;
 
   /* Set audio configuration */
-  AudioOut->DEVICE      = AUDIO_OUT_DEVICE;
   AudioOut->CHANNELS    = AUDIO_OUT_CHANNELS;
   AudioOut->SAMPLE_BITS = AUDIO_OUT_SAMPLE_BITS;
   AudioOut->SAMPLE_RATE = AUDIO_OUT_SAMPLE_RATE;
@@ -188,6 +187,15 @@ static int32_t Initialize (vStreamEvent_t event_cb) {
     for (i = 0; i < len; i++) {
       AudioOut->FILENAME = fn[i];
     }
+
+    if ((AudioOut->STATUS & STATUS_FILE_NAME_Msk) == 0U) {
+      /* File name is invalid */
+      return VSTREAM_ERROR;
+    }
+  }
+  else {
+    /* File not specified, set streaming device */
+    AudioOut->DEVICE = AUDIO_OUT_DEVICE;
   }
 
   /* Enable peripheral interrupts */
@@ -211,7 +219,7 @@ static int32_t Uninitialize (void) {
   __DSB();
   __ISB();
 
-  /* De-initialize Audio Input peripheral */
+  /* De-initialize Audio Output peripheral */
   AudioOut->Timer.Control = 0U;
   AudioOut->DMA.Control   = 0U;
   AudioOut->IRQ.Clear     = IRQ_TIMER_OVERFLOW_Msk;

interface/vstream/source/vstream_video_in.c

@@ -174,12 +174,12 @@ static int32_t Initialize (vStreamEvent_t event_cb) {
   VideoIn->CONTROL       = 0U;
 
   /* Set video configuration */
-  VideoIn->DEVICE       = VIDEO_IN_DEVICE;
   VideoIn->FRAME_WIDTH  = VIDEO_IN_FRAME_WIDTH;
   VideoIn->FRAME_HEIGHT = VIDEO_IN_FRAME_HEIGHT;
   VideoIn->FRAME_COLOR  = VIDEO_IN_FRAME_COLOR;
   VideoIn->FRAME_RATE   = VIDEO_IN_FRAME_RATE;
 
+  /* Set filename if specified */
   fn = VIDEO_IN_FILENAME;
   len = strlen(fn);
 
@@ -191,6 +191,15 @@ static int32_t Initialize (vStreamEvent_t event_cb) {
     for (i = 0; i < len; i++) {
       VideoIn->FILENAME = fn[i];
     }
+
+    if ((VideoIn->STATUS & STATUS_FILE_NAME_Msk) == 0U) {
+      /* File not found */
+      return VSTREAM_ERROR;
+    }
+  }
+  else {
+    /* File not specified, set streaming device */
+    VideoIn->DEVICE = VIDEO_IN_DEVICE;
   }
 
   /* Enable peripheral interrupts */

interface/vstream/source/vstream_video_out.c

@@ -189,6 +189,11 @@ static int32_t Initialize (vStreamEvent_t event_cb) {
     for (i = 0; i < len; i++) {
       VideoOut->FILENAME = fn[i];
     }
+
+    if ((VideoOut->STATUS & STATUS_FILE_NAME_Msk) == 0U) {
+      /* File name is invalid */
+      return VSTREAM_ERROR;
+    }
   }
 
   /* Enable peripheral interrupts */