This diff switches sysutils/tray-app to the new audio control API. Now
the programm displays and controls the sndiod master volume knob. This
has two advantages:

  - tray-app now works on any device, including those with no volume
    controls.

  - in case there are multiple audio devices, tray-app won't pick the
    wrong one anymore

OK?

Index: Makefile
===================================================================
RCS file: /cvs/ports/sysutils/tray-app/Makefile,v
retrieving revision 1.8
diff -u -p -u -p -r1.8 Makefile
--- Makefile    12 Jul 2019 20:49:53 -0000      1.8
+++ Makefile    8 Mar 2020 15:19:47 -0000
@@ -5,7 +5,7 @@ ONLY_FOR_ARCHS= ${APM_ARCHS}
 COMMENT=       small utilities for X11 system tray: eject, battery, mixer
 
 DISTNAME=      tray-app-0.3.1
-REVISION=      0
+REVISION=      1
 
 CATEGORIES=    sysutils x11
 
Index: patches/patch-sound_Makefile
===================================================================
RCS file: /cvs/ports/sysutils/tray-app/patches/patch-sound_Makefile,v
retrieving revision 1.1.1.1
diff -u -p -u -p -r1.1.1.1 patch-sound_Makefile
--- patches/patch-sound_Makefile        17 Sep 2013 11:21:50 -0000      1.1.1.1
+++ patches/patch-sound_Makefile        8 Mar 2020 15:19:47 -0000
@@ -1,6 +1,7 @@
 $OpenBSD: patch-sound_Makefile,v 1.1.1.1 2013/09/17 11:21:50 sthen Exp $
---- sound/Makefile.orig        Mon Mar 12 08:46:04 2012
-+++ sound/Makefile     Tue Sep 17 11:39:18 2013
+Index: sound/Makefile
+--- sound/Makefile.orig
++++ sound/Makefile
 @@ -8,13 +8,13 @@ MAN=
  
  gtk_CFLAGS!= pkg-config --cflags gtk+-2.0
@@ -8,7 +9,8 @@ $OpenBSD: patch-sound_Makefile,v 1.1.1.1
 -CFLAGS= -W -Wall -g -O0 -I../lib $(gtk_CFLAGS)
 +CFLAGS+= -W -Wall -I../lib $(gtk_CFLAGS)
  LDFLAGS= -L../lib $(gtk_LDFLAGS)
- LDADD= -ltrayapp
+-LDADD= -ltrayapp
++LDADD= -ltrayapp -lsndio
  
 -BINDIR=/usr/local/libexec/tray-app
 +BINDIR=${TRUEPREFIX}/libexec/tray-app
Index: patches/patch-sound_sound_c
===================================================================
RCS file: patches/patch-sound_sound_c
diff -N patches/patch-sound_sound_c
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ patches/patch-sound_sound_c 8 Mar 2020 15:19:47 -0000
@@ -0,0 +1,539 @@
+$OpenBSD$
+
+Index: sound/sound.c
+--- sound/sound.c.orig
++++ sound/sound.c
+@@ -4,12 +4,13 @@
+  */
+ #include <sys/types.h>
+ #include <sys/ioctl.h>
+-#include <sys/audioio.h>
++#include <sndio.h>
+ 
+ #include <gtk/gtk.h>
+ 
+ #include <err.h>
+ #include <fcntl.h>
++#include <poll.h>
+ #include <stdlib.h>
+ #include <string.h>
+ 
+@@ -19,16 +20,20 @@
+ #include "sound-1.xpm"
+ #include "sound-2.xpm"
+ 
++struct control {
++      struct control *next;
++      unsigned int addr;
++      unsigned int value;
++      unsigned int max;
++      int ismute;
++};
++
+ static void   usage(const char *prog);
+-static int    get_mixer_index(int fd, mixer_devinfo_t *devinfo);
+-static int    get_volume(int fd, mixer_devinfo_t *devinfo, u_char *volume);
+-static int    set_volume(int fd, mixer_devinfo_t *devinfo, u_char volume);
+-static int    get_mute(int fd, mixer_devinfo_t *devinfo, int *mute);
+-static int    set_mute(int fd, mixer_devinfo_t *devinfo, int mute);
++static void   set_state(int ismute, int mute);
++static void   get_state(int *rvolume, int *rmute);
+ 
+ static void   prepare_tooltip(int mute, u_char volume, char *text, size_t sz);
+ 
+-static gboolean       cb_timer(GtkWidget *widget);
+ static void   cb_button_toggled(GtkWidget *widget, gpointer data);
+ static void   cb_scale_value_changed(GtkScale *scale, GtkAdjustment *adj);
+ static gboolean       cb_window_delete(GtkWidget *widget,GdkEvent *event,
+@@ -44,12 +49,13 @@ static gboolean    cb_tray_query_tooltip(GtkStatusIcon *i
+ static int    init_gui(void);
+ static void   show_gui(void);
+ static void   hide_gui(void);
++static void   refresh_gui(void);
+ 
+ static int    init_tray(int doinvert);
+ static void   set_tray_icon(u_char volume);
+ 
+-static int            mixer_fd;
+-static mixer_devinfo_t        outputs_master_dev[2];  /* volume, mute */
++static struct sioctl_hdl *hdl;
++static struct control    *controls;
+ 
+ static GtkWidget      *gui_window = NULL;
+ static GtkObject      *gui_adj = NULL;
+@@ -63,9 +69,6 @@ static GdkPixbuf     *tray_pixbuf_0 = NULL;
+ static GdkPixbuf      *tray_pixbuf_1 = NULL;
+ static GdkPixbuf      *tray_pixbuf_2 = NULL;
+ 
+-static u_char         current_volume = 0;
+-static int            current_mute = 0;
+-
+ void
+ usage(const char *prog)
+ {
+@@ -76,104 +79,134 @@ usage(const char *prog)
+           prog);
+ }
+ 
+-static int
+-get_mixer_index(int fd, mixer_devinfo_t *devinfo)
++/*
++ * new control registered
++ */
++static void
++cb_control_desc(void *unused, struct sioctl_desc *d, int val)
+ {
+-      int error;
+-      int i, outputs_idx;
++      struct control *c, **pc;
++      int has_volume, has_mute;
++      int ismute;
+ 
+-      i = 0;
+-      outputs_idx = -1;
+-      devinfo[0].index = 0;
+-      for (;;) {
+-              error = ioctl(fd, AUDIO_MIXER_DEVINFO, devinfo + i);
+-              if (error == -1)
++      if (d == NULL) {
++              /*
++               * NULL indicates that we got all changes and its time
++               * to rebuild the GUI
++               */
++              has_volume = has_mute = 0;
++              for (c = controls; c != NULL; c = c->next) {
++                      if (c->ismute)
++                              has_mute = 1;
++                      else
++                              has_volume = 1;
++              }
++              gtk_widget_set_sensitive(GTK_WIDGET(gui_scale), has_volume);
++              gtk_widget_set_sensitive(GTK_WIDGET(gui_check), has_mute);
++              return;
++      }
++
++      /*
++       * delete existing control with the same address
++       */
++      for (pc = &controls; (c = *pc) != NULL; pc = &c->next) {
++              if (d->addr == c->addr) {
++                      *pc = c->next;
++                      free(c);
+                       break;
++              }
++      }
+ 
+-              if (i == 0 && devinfo[0].type == AUDIO_MIXER_CLASS &&
+-                  strcmp(devinfo[0].label.name, "outputs") == 0)
+-                      outputs_idx = devinfo[0].index;
+-              else if (i == 0 && devinfo[0].type == AUDIO_MIXER_VALUE &&
+-                  strcmp(devinfo[0].label.name, "master") == 0 &&
+-                  outputs_idx != -1 &&
+-                  devinfo[0].mixer_class == outputs_idx) {
+-                      devinfo[1].index = devinfo[0].index;
+-                      i++;
+-              } else if (i == 1 && devinfo[1].prev == devinfo[0].index &&
+-                  devinfo[1].type == AUDIO_MIXER_ENUM &&
+-                  strcmp(devinfo[1].label.name, "mute") == 0 &&
+-                  devinfo[1].mixer_class == outputs_idx)
+-                      return (0);
++      /*
++       * SIOCTL_NONE means control was deleted
++       */
++      if (d->type == SIOCTL_NONE)
++              return;
+ 
+-              devinfo[i].index++;
+-      }
+-      return (-1);
+-}
++      /*
++       * we're interested in top-level output.xxx controls only
++       */
++      if (strcmp(d->group, "") != 0 || strcmp(d->node0.name, "output") != 0)
++              return;
+ 
+-static int
+-get_volume(int fd, mixer_devinfo_t *devinfo, u_char *volume)
+-{
+-      mixer_ctrl_t mctl;
+-      int error;
++      if (strcmp(d->func, "level") == 0)
++              ismute = 0;
++      else if (strcmp(d->func, "mute") == 0)
++              ismute = 1;
++      else
++              return;
+ 
+-      memset(&mctl, 0, sizeof(mctl));
+-      mctl.dev = devinfo->index;
+-      mctl.type = AUDIO_MIXER_VALUE;
+-      error = ioctl(fd, AUDIO_MIXER_READ, &mctl);
+-      if (error == -1)
+-              return (-1);
+-      *volume = mctl.un.value.level[0];
+-      return (0);
++      c = malloc(sizeof(struct control));
++      if (c == NULL)
++              err(1, "malloc");
++
++      c->addr = d->addr;
++      c->max = d->maxval;
++      c->value = val;
++      c->ismute = ismute;
++      c->next = controls;
++      controls = c;
+ }
+ 
+-static int
+-set_volume(int fd, mixer_devinfo_t *devinfo, u_char volume)
++/*
++ * control value changed
++ */
++static void
++cb_control_value(void *unused, unsigned int addr, unsigned int value)
+ {
+-      mixer_ctrl_t mctl;
+-      int i, error;
++      struct control *c;
+ 
+-      memset(&mctl, 0, sizeof(mctl));
+-      mctl.dev = devinfo->index;
+-      mctl.type = devinfo->type;
+-      mctl.un.value.num_channels = devinfo->un.v.num_channels;
+-      for (i = 0; i < devinfo->un.v.num_channels; i++)
+-              mctl.un.value.level[i] = volume;
+-      error = ioctl(fd, AUDIO_MIXER_WRITE, &mctl);
+-      if (error == -1)
+-              return (-1);
+-      return (0);
++      for (c = controls; ; c = c->next) {
++              if (c == NULL)
++                      return;
++              if (c->addr == addr)
++                      break;
++      }
++      if (c->value == value)
++              return;
++              
++      c->value = value;
++      refresh_gui();
+ }
+ 
+-static int
+-get_mute(int fd, mixer_devinfo_t *devinfo, int *mute)
++/*
++ * Return current volume and mute states:
++ *   - the returned volume is the minimum volume of all channels.
++ *   - the returned mute set 1 if all channels are muted
++ */
++static void
++get_state(int *rvolume, int *rmute)
+ {
+-      mixer_ctrl_t mctl;
+-      int error;
+-
+-      memset(&mctl, 0, sizeof(mctl));
+-      mctl.dev = devinfo->index;
+-      mctl.type = AUDIO_MIXER_ENUM;
+-      error = ioctl(fd, AUDIO_MIXER_READ, &mctl);
+-      if (error == -1)
+-              return (-1);
+-      *mute = mctl.un.ord;
+-      return (0);
++      struct control *c;
++      int mute = 0;
++      int v, volume = 100;
++      
++      for (c = controls; c != NULL; c = c->next) {
++              if (c->ismute) {
++                      mute |= !!c->value;
++              } else {
++                      v = (c->value * 100 + c->max / 2) / c->max;
++                      if (v < volume)
++                              volume = v;
++              }
++      }
++      *rvolume = volume;
++      *rmute = mute;
+ }
+ 
+-static int
+-set_mute(int fd, mixer_devinfo_t *devinfo, int mute)
++static void
++set_state(int ismute, int value)
+ {
+-      mixer_ctrl_t mctl;
+-      int error;
++      struct control *c;
+ 
+-      memset(&mctl, 0, sizeof(mctl));
+-      mctl.dev = devinfo->index;
+-      mctl.type = devinfo->type;
+-      mctl.un.ord = mute;
+-      error = ioctl(fd, AUDIO_MIXER_WRITE, &mctl);
+-      if (error == -1)
+-              return (-1);
+-      return (0);
++      for (c = controls; c != NULL; c = c->next) {
++              if (c->ismute != ismute)
++                      continue;
++              c->value = c->ismute ? !!value : (value * c->max + 50) / 100;
++              sioctl_setval(hdl, c->addr, c->value);
++      }
++
++      refresh_gui();
+ }
+ 
+ static void
+@@ -182,63 +215,20 @@ prepare_tooltip(int mute, u_char volume, char *text, s
+       if (mute) {
+               strlcpy(text, "Audio is muted", sz);
+       } else {
+-              snprintf(text, sz, "Audio volume: %u%%",
+-                  100U * (u_int)volume / AUDIO_MAX_GAIN);
++              snprintf(text, sz, "Audio volume: %u%%", volume);
+       }
+ }
+ 
+-static gboolean
+-cb_timer(GtkWidget *widget)
+-{
+-      int mute;
+-      u_char volume;
+-
+-      if (get_mute(mixer_fd, outputs_master_dev + 1, &mute) == -1)
+-              return (TRUE);
+-      else if (get_volume(mixer_fd, outputs_master_dev, &volume) == -1)
+-              return (TRUE);
+-      if (mute != current_mute || volume != current_volume) {
+-              set_tray_icon(mute ? 0 : volume);
+-
+-              /* Move slider. Change "check" button state. */
+-              if (widget->window != NULL) {
+-                      gtk_adjustment_set_value(GTK_ADJUSTMENT(gui_adj),
+-                          AUDIO_MAX_GAIN - volume);
+-                      gtk_toggle_button_set_active(
+-                          GTK_TOGGLE_BUTTON(gui_check), mute);
+-                      gtk_widget_set_sensitive(GTK_WIDGET(gui_scale), !mute);
+-              }
+-
+-              current_volume = volume;
+-              current_mute = mute;
+-      }
+-
+-      return (TRUE);
+-}
+-
+ static void
+ cb_button_toggled(GtkWidget *widget, gpointer data)
+ {
+-      int mute;
+-
+-      mute = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(widget));
+-      if (set_mute(mixer_fd, outputs_master_dev + 1, mute) == 0) {
+-              gtk_widget_set_sensitive(GTK_WIDGET(gui_scale), !mute);
+-              set_tray_icon(mute ? 0 : current_volume);
+-              current_mute = mute;
+-      }
++      set_state(1, gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(widget)));
+ }
+ 
+ static void
+ cb_scale_value_changed(GtkScale *scale, GtkAdjustment *adj)
+ {
+-      u_char volume;
+-
+-      volume = AUDIO_MAX_GAIN - (u_char)gtk_adjustment_get_value(adj);
+-      if (set_volume(mixer_fd, outputs_master_dev, volume) == 0) {
+-              set_tray_icon(current_mute ? 0 : volume);
+-              current_volume = volume;
+-      }
++      set_state(0, 100 - (int)gtk_adjustment_get_value(adj));
+ }
+ 
+ static gboolean
+@@ -277,8 +267,10 @@ cb_tray_query_tooltip(GtkStatusIcon *icon, gint x, gin
+     gboolean keyboard_mode, GtkTooltip *tooltip, gpointer data)
+ {
+       char text[30];
++      int volume, mute;
+ 
+-      prepare_tooltip(current_mute, current_volume, text, sizeof(text));
++      get_state(&volume, &mute);
++      prepare_tooltip(mute, volume, text, sizeof(text));
+       gtk_tooltip_set_text(tooltip, text);
+       return (TRUE);
+ }
+@@ -304,8 +296,7 @@ init_gui(void)
+       gtk_window_set_deletable(GTK_WINDOW(gui_window), FALSE);
+       gtk_window_set_decorated(GTK_WINDOW(gui_window), FALSE);
+ 
+-      gui_adj = gtk_adjustment_new(0.0, AUDIO_MIN_GAIN,
+-          AUDIO_MAX_GAIN, 1.0, 10.0, 0.0);
++      gui_adj = gtk_adjustment_new(0.0, 0, 100, 1.0, 10.0, 0.0);
+       if (gui_adj == NULL)
+               return (-1);
+ 
+@@ -355,12 +346,14 @@ show_gui(void)
+       GdkRectangle area;
+       GtkOrientation orientation;
+       int width, height, x, y;
++      int volume, mute;
+ 
++      get_state(&volume, &mute);
++
+       gtk_adjustment_set_value(GTK_ADJUSTMENT(gui_adj),
+-          AUDIO_MAX_GAIN - current_volume);
++          100 - volume);
+       gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(gui_check),
+-          current_mute);
+-      gtk_widget_set_sensitive(GTK_WIDGET(gui_scale), !current_mute);
++          mute);
+       gtk_widget_show_all(GTK_WIDGET(gui_window));
+ 
+       gtk_status_icon_get_geometry(tray_icon, NULL, &area, &orientation);
+@@ -391,12 +384,33 @@ hide_gui(void)
+       gtk_widget_hide(GTK_WIDGET(gui_window));
+ }
+ 
++/*
++ * refresh gui state
++ */
++static void
++refresh_gui(void)
++{
++      GtkWidget *widget = (gpointer)gui_window;
++      int volume, mute;
++
++      get_state(&volume, &mute);
++
++      set_tray_icon(mute ? 0 : volume);
++
++      /* Move slider. Change "check" button state. */
++      if (widget->window != NULL) {
++              gtk_adjustment_set_value(GTK_ADJUSTMENT(gui_adj),
++                  100 - volume);
++              gtk_toggle_button_set_active(
++                  GTK_TOGGLE_BUTTON(gui_check), mute);
++      }
++}
++
+ static int
+ init_tray(int doinvert)
+ {
+       char tooltip[30];
+-      u_char volume;
+-      int mute;
++      int volume, mute;
+ 
+       tray_pixbuf = gdk_pixbuf_new_from_xpm_data(sound_xpm);
+       if (tray_pixbuf == NULL)
+@@ -421,13 +435,9 @@ init_tray(int doinvert)
+       tray_icon = gtk_status_icon_new();
+       if (tray_icon == NULL)
+               return (-1);
+-      volume = 0;
+-      mute = 0;
+-      get_volume(mixer_fd, outputs_master_dev, &volume);
+-      get_mute(mixer_fd, outputs_master_dev + 1, &mute);
++
++      get_state(&volume, &mute);
+       set_tray_icon(mute ? 0 : volume);
+-      current_volume = volume;
+-      current_mute = mute;
+ 
+       prepare_tooltip(mute, volume, tooltip, sizeof(tooltip));
+       gtk_status_icon_set_tooltip_text(tray_icon, tooltip);
+@@ -455,7 +465,43 @@ set_tray_icon(u_char volume)
+       gtk_status_icon_set_from_pixbuf(tray_icon, pb);
+ }
+ 
++/*
++ * Call poll(2), for both gtk and sndio descriptors.
++ */
+ int
++do_poll(GPollFD *gtk_pfds, guint gtk_nfds, gint timeout)
++{
++#define MAXFDS 64
++      struct pollfd pfds[MAXFDS], *sioctl_pfds;
++      unsigned int sioctl_nfds;
++      unsigned int i;
++      int revents;
++      int rc;
++
++      for (i = 0; i < gtk_nfds; i++) {
++              pfds[i].fd = gtk_pfds[i].fd;
++              pfds[i].events = gtk_pfds[i].events;
++      }
++      if (hdl != NULL) {
++              sioctl_pfds = pfds + gtk_nfds;
++              sioctl_nfds = sioctl_pollfd(hdl, sioctl_pfds, POLLIN);
++      } else
++              sioctl_nfds = 0;
++
++      rc = poll(pfds, gtk_nfds + sioctl_nfds, timeout);
++      if (rc > 0 && hdl != NULL) {
++              revents = sioctl_revents(hdl, sioctl_pfds);
++              if (revents & POLLHUP)
++                      errx(1, "Device disconnected");
++      }
++
++      for (i = 0; i < gtk_nfds; i++)
++              gtk_pfds[i].revents = pfds[i].revents;
++
++      return rc;
++}
++
++int
+ main(int argc, char **argv)
+ {
+       char *progname;
+@@ -481,30 +527,34 @@ main(int argc, char **argv)
+       }
+       argc -= optind;
+       argv += optind;
+-
+-      mixer_fd = open("/dev/mixer", O_RDWR);
+-      if (mixer_fd == -1)
++      
++      hdl = sioctl_open(SIO_DEVANY, SIOCTL_READ | SIOCTL_WRITE, 0);
++      if (hdl == NULL) {
+               errx(1, "Cannot open mixer device");
+-
+-      error = get_mixer_index(mixer_fd, outputs_master_dev);
+-      if (error == -1) {
+-              close(mixer_fd);
+-              errx(1, "Cannot get mixer information");
+       }
+-
+       error = init_tray(invert_flag);
+       if (error == -1) {
+-              close(mixer_fd);
++              sioctl_close(hdl);
+               errx(1, "Cannot initialize notification area");
+       }
+       error = init_gui();
+       if (error == -1) {
+-              close(mixer_fd);
++              sioctl_close(hdl);
+               errx(1, "Cannot initialize program window");
+       }
+-      g_timeout_add(1000, (GSourceFunc)cb_timer, (gpointer)gui_window);
++
++      if (!sioctl_ondesc(hdl, cb_control_desc, NULL)) {
++              sioctl_close(hdl);
++              errx(1, "Cannot get mixer information");
++      }
++      if (!sioctl_onval(hdl, cb_control_value, NULL)) {
++              sioctl_close(hdl);
++              errx(1, "Cannot get mixer values");
++      }
++
++      g_main_context_set_poll_func(g_main_context_default(), do_poll);
+       gtk_main();
+ 
+-      close(mixer_fd);
++      sioctl_close(hdl);
+       return (0);
+ }

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