Add support for routing the Gen 4 DSP I/O

src/alsa.c

@@ -11,6 +11,7 @@
 const char *port_category_names[PC_COUNT] = {
   "Hardware Outputs",
   "Mixer Inputs",
+  "DSP Inputs",
   "PCM Inputs"
 };
 

src/alsa.h

@@ -28,11 +28,14 @@ enum {
   // Mixer inputs/outputs
   PC_MIX   = 1,
 
+  // DSP inputs/outputs
+  PC_DSP   = 2,
+
   // PCM inputs/outputs
-  PC_PCM   = 2,
+  PC_PCM   = 3,
 
   // number of port categories
-  PC_COUNT = 3
+  PC_COUNT = 4
 };
 
 // names for the port categories
@@ -56,7 +59,7 @@ struct routing_src {
   // the enum id of the alsa item
   int id;
 
-  // PC_MIX, PC_PCM, or PC_HW
+  // PC_DSP, PC_MIX, PC_PCM, or PC_HW
   int port_category;
 
   // 0-based count within port_category
@@ -79,7 +82,7 @@ struct routing_src {
 // entry in alsa_card routing_snks (routing sinks) array for alsa
 // elements that are routing sinks like Analogue Output 01 Playback
 // Enum
-// port_category is set to PC_MIX, PC_PCM, PC_HW
+// port_category is set to PC_DSP, PC_MIX, PC_PCM, PC_HW
 // port_num is a count (0-based) within that category
 struct routing_snk {
 
@@ -89,7 +92,7 @@ struct routing_snk {
   // pointer back to the element this entry is associated with
   struct alsa_elem *elem;
 
-  // PC_MIX, PC_PCM, or PC_HW
+  // PC_DSP, PC_MIX, PC_PCM, or PC_HW
   int port_category;
 
   // 0-based count within port_category
@@ -164,6 +167,8 @@ struct alsa_card {
   GtkWidget          *routing_hw_out_grid;
   GtkWidget          *routing_pcm_in_grid;
   GtkWidget          *routing_pcm_out_grid;
+  GtkWidget          *routing_dsp_in_grid;
+  GtkWidget          *routing_dsp_out_grid;
   GtkWidget          *routing_mixer_in_grid;
   GtkWidget          *routing_mixer_out_grid;
   GtkWidget          *meters[MAX_METERS];

src/routing-lines.c

@@ -10,6 +10,10 @@ static const double dash_dotted[] = { 1, 10 };
 // dash when dragging and not connected
 static const double dash[] = { 4 };
 
+// is a port category a mixer or DSP port, therefore at the
+// top/bottom?
+#define IS_MIXER(x) ((x) == PC_MIX || (x) == PC_DSP)
+
 static void choose_line_colour(
   struct routing_src *r_src,
   struct routing_snk *r_snk,
@@ -53,8 +57,8 @@ static void choose_line_colour(
   }
 
   // mix <-> non-mix, add blue
-  if ((r_src->port_category == PC_MIX) !=
+  if (IS_MIXER(r_src->port_category) !=
-      (r_snk->port_category == PC_MIX)) {
+      IS_MIXER(r_snk->port_category)) {
     *b = 0.5;
   }
 
@@ -166,10 +170,10 @@ static void draw_connection(
   cairo_t *cr,
   double   x1,
   double   y1,
-  int      src_is_mixer,
+  int      src_port_category,
   double   x2,
   double   y2,
-  int      snk_is_mixer,
+  int      snk_port_category,
   double   r,
   double   g,
   double   b,
@@ -177,6 +181,9 @@ static void draw_connection(
 ) {
   double x3 = x1, y3 = y1, x4 = x2, y4 = y2;
 
+  int src_is_mixer = IS_MIXER(src_port_category);
+  int snk_is_mixer = IS_MIXER(snk_port_category);
+
   // vertical/horizontal?
   if (src_is_mixer == snk_is_mixer) {
     double f1 = 0.3;
@@ -241,7 +248,7 @@ static void get_src_center(
   double             *y
 ) {
   get_widget_center(r_src->widget2, parent, x, y);
-  if (r_src->port_category == PC_MIX)
+  if (IS_MIXER(r_src->port_category))
     (*y)++;
 }
 
@@ -252,7 +259,7 @@ static void get_snk_center(
   double             *y
 ) {
   get_widget_center(r_snk->elem->widget2, parent, x, y);
-  if (r_snk->port_category == PC_MIX)
+  if (IS_MIXER(r_snk->port_category))
     (*y)++;
 }
 
@@ -314,8 +321,8 @@ void draw_routing_lines(
     // draw the connection
     draw_connection(
       cr,
-      x1, y1, r_src->port_category == PC_MIX,
+      x1, y1, r_src->port_category,
-      x2, y2, r_snk->port_category == PC_MIX,
+      x2, y2, r_snk->port_category,
       r, g, b, 2
     );
   }
@@ -376,8 +383,8 @@ void draw_drag_line(
   if (card->src_drag && card->snk_drag) {
     draw_connection(
       cr,
-      x1, y1, card->src_drag->port_category == PC_MIX,
+      x1, y1, card->src_drag->port_category,
-      x2, y2, card->snk_drag->port_category == PC_MIX,
+      x2, y2, card->snk_drag->port_category,
       0, 0, 0, 2
     );
 

src/window-routing.c

@@ -30,6 +30,8 @@ static void get_routing_srcs(struct alsa_card *card) {
 
     if (strncmp(name, "Mix", 3) == 0)
       r->port_category = PC_MIX;
+    else if (strncmp(name, "DSP", 3) == 0)
+      r->port_category = PC_DSP;
     else if (strncmp(name, "PCM", 3) == 0)
       r->port_category = PC_PCM;
     else
@@ -93,6 +95,8 @@ static void get_routing_snks(struct alsa_card *card) {
     r->elem = elem;
     if (strncmp(elem->name, "Mixer Input", 11) == 0) {
       r->port_category = PC_MIX;
+    } else if (strncmp(elem->name, "DSP Input", 9) == 0) {
+      r->port_category = PC_DSP;
     } else if (strncmp(elem->name, "PCM", 3) == 0) {
       r->port_category = PC_PCM;
     } else if (strstr(elem->name, "Playback Enum")) {
@@ -287,6 +291,8 @@ static GtkWidget *create_routing_group_grid(
 static void create_routing_grid(struct alsa_card *card) {
   GtkGrid *routing_grid = GTK_GRID(card->routing_grid = gtk_grid_new());
 
+  int has_dsp = !!card->routing_in_count[PC_DSP];
+
   gtk_widget_set_halign(card->routing_grid, GTK_ALIGN_CENTER);
   gtk_widget_set_valign(card->routing_grid, GTK_ALIGN_CENTER);
 
@@ -311,6 +317,16 @@ static void create_routing_grid(struct alsa_card *card) {
     card, "routing_hw_out_grid", "Hardware Outputs",
     GTK_ORIENTATION_VERTICAL, GTK_ALIGN_START
   );
+  if (has_dsp) {
+    card->routing_dsp_in_grid = create_routing_group_grid(
+      card, "routing_dsp_in_grid", "DSP\nInputs",
+      GTK_ORIENTATION_HORIZONTAL, GTK_ALIGN_CENTER
+    );
+    card->routing_dsp_out_grid = create_routing_group_grid(
+      card, "routing_dsp_out_grid", "DSP\nOutputs",
+      GTK_ORIENTATION_HORIZONTAL, GTK_ALIGN_CENTER
+    );
+  }
   card->routing_mixer_in_grid = create_routing_group_grid(
     card, "routing_mixer_in_grid", "Mixer\nInputs",
     GTK_ORIENTATION_HORIZONTAL, GTK_ALIGN_CENTER
@@ -321,34 +337,47 @@ static void create_routing_grid(struct alsa_card *card) {
     GTK_ORIENTATION_HORIZONTAL, GTK_ALIGN_CENTER
   );
 
+  int left_col_num = 0;
+  int dsp_col_num = has_dsp ? 1 : 0;
+  int mix_col_num = dsp_col_num + 1;
+  int right_col_num = mix_col_num + 1;
+
   gtk_grid_attach(
-    routing_grid, card->routing_hw_in_grid, 0, 1, 1, 1
+    routing_grid, card->routing_hw_in_grid, left_col_num, 1, 1, 1
   );
   gtk_grid_attach(
-    routing_grid, card->routing_pcm_in_grid, 0, 2, 1, 1
+    routing_grid, card->routing_pcm_in_grid, left_col_num, 2, 1, 1
   );
   gtk_grid_attach(
-    routing_grid, card->routing_pcm_out_grid, 2, 1, 1, 1
+    routing_grid, card->routing_pcm_out_grid, right_col_num, 1, 1, 1
   );
   gtk_grid_attach(
-    routing_grid, card->routing_hw_out_grid, 2, 2, 1, 1
+    routing_grid, card->routing_hw_out_grid, right_col_num, 2, 1, 1
+  );
+  if (has_dsp) {
+    gtk_grid_attach(
+      routing_grid, card->routing_dsp_in_grid, dsp_col_num, 0, 1, 1
     );
     gtk_grid_attach(
-    routing_grid, card->routing_mixer_in_grid, 1, 0, 1, 1
+      routing_grid, card->routing_dsp_out_grid, dsp_col_num, 3, 1, 1
+    );
+  }
+  gtk_grid_attach(
+    routing_grid, card->routing_mixer_in_grid, mix_col_num, 0, 1, 1
   );
   gtk_grid_attach(
-    routing_grid, card->routing_mixer_out_grid, 1, 3, 1, 1
+    routing_grid, card->routing_mixer_out_grid, mix_col_num, 3, 1, 1
   );
   gtk_widget_set_margin(card->routing_grid, 10);
   gtk_grid_set_spacing(routing_grid, 10);
 
   GtkWidget *src_label = gtk_label_new("↑\nSources →");
   gtk_label_set_justify(GTK_LABEL(src_label), GTK_JUSTIFY_CENTER);
-  gtk_grid_attach(routing_grid, src_label, 0, 3, 1, 1);
+  gtk_grid_attach(routing_grid, src_label, left_col_num, 3, 1, 1);
 
   GtkWidget *snk_label = gtk_label_new("← Sinks\n↓");
   gtk_label_set_justify(GTK_LABEL(snk_label), GTK_JUSTIFY_CENTER);
-  gtk_grid_attach(routing_grid, snk_label, 2, 0, 1, 1);
+  gtk_grid_attach(routing_grid, snk_label, right_col_num, 0, 1, 1);
 }
 
 static GtkWidget *make_socket_widget(void) {
@@ -759,9 +788,22 @@ static void make_routing_alsa_elem(struct routing_snk *r_snk) {
   struct alsa_elem *elem = r_snk->elem;
   struct alsa_card *card = elem->card;
 
-  // "Mixer Input X Capture Enum" controls (Mixer Inputs) go along
+  // "DSP Input X Capture Enum" controls (DSP Inputs) go along
   // the top, in card->routing_mixer_in_grid
-  if (r_snk->port_category == PC_MIX) {
+  if (r_snk->port_category == PC_DSP) {
+
+    char name[10];
+
+    snprintf(name, 10, "%d", elem->lr_num);
+    make_snk_routing_widget(r_snk, name, GTK_ORIENTATION_VERTICAL);
+    gtk_grid_attach(
+      GTK_GRID(card->routing_dsp_in_grid), elem->widget,
+      r_snk->port_num + 1, 0, 1, 1
+    );
+
+  // "Mixer Input X Capture Enum" controls (Mixer Inputs) go along
+  // the top, in card->routing_mixer_in_grid after the DSP Inputs
+  } else if (r_snk->port_category == PC_MIX) {
 
     char name[10];
 
@@ -840,7 +882,20 @@ static void add_routing_widgets(
       card->routing_srcs, struct routing_src, i
     );
 
-    if (r_src->port_category == PC_MIX) {
+    if (r_src->port_category == PC_DSP) {
+      // r_src->name is "DSP X"
+      // +4 to skip "DSP "
+      make_src_routing_widget(
+        card, r_src, r_src->name + 4, GTK_ORIENTATION_VERTICAL
+      );
+      gtk_grid_attach(
+        GTK_GRID(card->routing_dsp_out_grid), r_src->widget,
+        r_src->port_num + 1, 0, 1, 1
+      );
+
+    } else if (r_src->port_category == PC_MIX) {
+      // r_src->name is "Mix X"
+      // +4 to skip "Mix "
       make_src_routing_widget(
         card, r_src, r_src->name + 4, GTK_ORIENTATION_VERTICAL
       );