diff options
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/monitor.c | 355 |
1 files changed, 175 insertions, 180 deletions
diff --git a/examples/monitor.c b/examples/monitor.c index 87e41f3..0e0d24e 100644 --- a/examples/monitor.c +++ b/examples/monitor.c @@ -1,24 +1,24 @@ /* * Copyright (C) 2014 Michal Ratajsky <[email protected]> * - * This library is free software; you can redistribute it and/or + * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the licence, or (at your option) any later version. * - * This library is distributed in the hope that it will be useful, + * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see <http://www.gnu.org/licenses/>. + * License along with this program; if not, see <http://www.gnu.org/licenses/>. */ -#include <glib.h> -#include <glib-object.h> #include <string.h> #include <locale.h> +#include <glib.h> +#include <glib-object.h> #ifdef G_OS_UNIX #include <glib-unix.h> @@ -27,43 +27,17 @@ #include <libmatemixer/matemixer.h> static MateMixerContext *context; -static GMainLoop *mainloop; - -static gchar * -create_app_string (const gchar *app_name, - const gchar *app_id, - const gchar *app_version) -{ - GString *string; - - string = g_string_new (""); - - if (app_name != NULL) { - g_string_append (string, app_name); - - if (app_version != NULL) - g_string_append_printf (string, " %s", app_version); - if (app_id != NULL) - g_string_append_printf (string, " (%s)", app_id); - } - else if (app_id != NULL) { - g_string_append (string, app_id); - - if (app_version != NULL) - g_string_append_printf (string, " %s", app_version); - } - - return g_string_free (string, FALSE); -} +static GMainLoop *mainloop; +/* Convert MateMixerStreamControlRole constant to a string */ static const gchar * -get_stream_control_role_string (MateMixerStreamControlRole role) +get_role_string (MateMixerStreamControlRole role) { switch (role) { - case MATE_MIXER_STREAM_CONTROL_ROLE_UNKNOWN: - return "Unknown"; case MATE_MIXER_STREAM_CONTROL_ROLE_MASTER: return "Master"; + case MATE_MIXER_STREAM_CONTROL_ROLE_APPLICATION: + return "Application"; case MATE_MIXER_STREAM_CONTROL_ROLE_PCM: return "PCM"; case MATE_MIXER_STREAM_CONTROL_ROLE_SPEAKER: @@ -85,17 +59,15 @@ get_stream_control_role_string (MateMixerStreamControlRole role) case MATE_MIXER_STREAM_CONTROL_ROLE_MUSIC: return "Music"; default: - break; + return "Unknown"; } - return "Unknown"; } +/* Convert MateMixerStreamControlMediaRole constant to a string */ static const gchar * -get_stream_control_media_role_string (MateMixerStreamControlMediaRole role) +get_media_role_string (MateMixerStreamControlMediaRole role) { switch (role) { - case MATE_MIXER_STREAM_CONTROL_MEDIA_ROLE_UNKNOWN: - return "Unknown"; case MATE_MIXER_STREAM_CONTROL_MEDIA_ROLE_VIDEO: return "Video"; case MATE_MIXER_STREAM_CONTROL_MEDIA_ROLE_MUSIC: @@ -119,176 +91,193 @@ get_stream_control_media_role_string (MateMixerStreamControlMediaRole role) case MATE_MIXER_STREAM_CONTROL_MEDIA_ROLE_FILTER: return "Filter"; default: - break; + return "Unknown"; } - return "Unknown"; } -static gchar * -create_volume_bar (MateMixerStreamControl *ctl, double *percent) +/* Convert MateMixerSwitchRole constant to a string */ +static const gchar * +get_switch_role_string (MateMixerSwitchRole role) { - GString *string; - gint64 volume; - gint64 volume_min; - gint64 volume_max; - double p; - int i; - int length = 30; - int stars; - - volume = mate_mixer_stream_control_get_volume (ctl); - volume_min = mate_mixer_stream_control_get_min_volume (ctl); - volume_max = mate_mixer_stream_control_get_normal_volume (ctl); - - string = g_string_new ("["); + switch (role) { + case MATE_MIXER_SWITCH_ROLE_DEVICE_PROFILE: + return "Device Profile"; + case MATE_MIXER_SWITCH_ROLE_PORT: + return "Port"; + case MATE_MIXER_SWITCH_ROLE_BOOST: + return "Boost"; + default: + return "Unknown"; + } +} - p = (double) (volume - volume_min) / (volume_max - volume_min) * 100; - if (percent != NULL) - *percent = p; +/* Convert MateMixerDirection constant to a string */ +static const gchar * +get_direction_string (MateMixerDirection direction) +{ + switch (direction) { + case MATE_MIXER_DIRECTION_INPUT: + return "Record"; + case MATE_MIXER_DIRECTION_OUTPUT: + return "Playback"; + default: + return "Unknown"; + } +} - stars = (int) ((p / 100) * length); +static gdouble +get_volume_percentage (MateMixerStreamControl *control) +{ + guint volume; + guint volume_min; + guint volume_max; - for (i = 0; i < length; i++) - g_string_append_c (string, (i < stars) ? '*' : '.'); + volume = mate_mixer_stream_control_get_volume (control); + volume_min = mate_mixer_stream_control_get_min_volume (control); + volume_max = mate_mixer_stream_control_get_normal_volume (control); - return g_string_free (g_string_append_c (string, ']'), FALSE); + return (gdouble) (volume - volume_min) / (volume_max - volume_min) * 100; } +/* Print a list of sound devices */ static void print_devices (void) { const GList *devices; + /* Read a list of devices from the context */ devices = mate_mixer_context_list_devices (context); - - while (devices) { + while (devices != NULL) { + const GList *switches; MateMixerDevice *device = MATE_MIXER_DEVICE (devices->data); - g_print ("Device %s\n" - " |-| Label : %s\n" - " |-| Icon Name : %s\n\n", + g_print ("Device %s:\n" + "\tLabel : %s\n" + "\tIcon Name : %s\n\n", mate_mixer_device_get_name (device), mate_mixer_device_get_label (device), mate_mixer_device_get_icon (device)); - const GList *switches = mate_mixer_device_list_switches (device); - + /* Read a list of switches that belong to the device */ + switches = mate_mixer_device_list_switches (device); while (switches != NULL) { - MateMixerSwitch *swtch = MATE_MIXER_SWITCH (switches->data); + const GList *options; + MateMixerSwitch *swtch = MATE_MIXER_SWITCH (switches->data); MateMixerSwitchOption *active = mate_mixer_switch_get_active_option (swtch); - const GList *options; - - options = mate_mixer_switch_list_options (swtch); + g_print ("\tSwitch %s:\n" + "\t\tLabel : %s\n" + "\t\tRole : %s\n", + mate_mixer_switch_get_name (swtch), + mate_mixer_switch_get_label (swtch), + get_switch_role_string (mate_mixer_switch_get_role (swtch))); - g_print ("Switch %s\n", - mate_mixer_switch_get_name (swtch)); + g_print ("\tOptions:\n"); + /* Read a list of switch options that belong to the switch */ + options = mate_mixer_switch_list_options (swtch); while (options != NULL) { MateMixerSwitchOption *option = MATE_MIXER_SWITCH_OPTION (options->data); - g_print (" |%c| %s (icon: %s)\n", - (option == active) + g_print ("\t\t|%c| %s\n", + (active != NULL && option == active) ? '*' : '-', - mate_mixer_switch_option_get_label (option), - mate_mixer_switch_option_get_icon (option)); + mate_mixer_switch_option_get_label (option)); options = options->next; } + g_print ("\n"); switches = switches->next; } - g_print ("\n"); devices = devices->next; } } +/* Print a list of streams */ static void print_streams (void) { const GList *streams; + /* Read a list of streams from the context */ streams = mate_mixer_context_list_streams (context); - - while (streams) { - MateMixerStream *stream = MATE_MIXER_STREAM (streams->data); - MateMixerStreamControl *ctl; - MateMixerSwitch *swtch; - gchar *volume_bar; - gdouble volume; - - const GList *controls; - const GList *switches; - + while (streams != NULL) { + MateMixerStream *stream = MATE_MIXER_STREAM (streams->data); + const GList *controls; + const GList *switches; + + g_print ("Stream %s:\n" + "\tLabel : %s\n" + "\tDirection : %s\n\n", + mate_mixer_stream_get_name (stream), + mate_mixer_stream_get_label (stream), + get_direction_string (mate_mixer_stream_get_direction (stream))); + + /* Read a list of controls in the stream */ controls = mate_mixer_stream_list_controls (stream); - while (controls != NULL) { - ctl = MATE_MIXER_STREAM_CONTROL (controls->data); - - const gchar *role; - - role = get_stream_control_role_string (mate_mixer_stream_control_get_role (ctl)); - - // XXX volume is sometimes -nan, use flags - volume_bar = create_volume_bar (ctl, &volume); - - g_print ("Stream %s control %s / %s\n" - " |-| Volume : %s %.1f %% (%.1f dB)\n" - " |-| Muted : %s\n" - " |-| Channels : %d\n" - " |-| Balance : %.1f\n" - " |-| Fade : %.1f\n" - " |-| Role : %s\n", - mate_mixer_stream_get_name (stream), - mate_mixer_stream_control_get_name (ctl), - mate_mixer_stream_control_get_label (ctl), - volume_bar, - volume, - mate_mixer_stream_control_get_decibel (ctl), - mate_mixer_stream_control_get_mute (ctl) ? "Yes" : "No", - mate_mixer_stream_control_get_num_channels (ctl), - mate_mixer_stream_control_get_balance (ctl), - mate_mixer_stream_control_get_fade (ctl), - role); - - g_free (volume_bar); - + MateMixerStreamControl *control = MATE_MIXER_STREAM_CONTROL (controls->data); + + g_print ("\tControl %s:\n" + "\t\tLabel : %s\n" + "\t\tVolume : %.0f %%\n" + "\t\tMuted : %s\n" + "\t\tChannels : %d\n" + "\t\tBalance : %.1f\n" + "\t\tFade : %.1f\n" + "\t\tRole : %s\n" + "\t\tMedia role : %s\n", + mate_mixer_stream_control_get_name (control), + mate_mixer_stream_control_get_label (control), + get_volume_percentage (control), + mate_mixer_stream_control_get_mute (control) ? "Yes" : "No", + mate_mixer_stream_control_get_num_channels (control), + mate_mixer_stream_control_get_balance (control), + mate_mixer_stream_control_get_fade (control), + get_role_string (mate_mixer_stream_control_get_role (control)), + get_media_role_string (mate_mixer_stream_control_get_media_role (control))); + + g_print ("\n"); controls = controls->next; } + /* Read a list of switches in the stream */ switches = mate_mixer_stream_list_switches (stream); - while (switches != NULL) { - swtch = MATE_MIXER_SWITCH (switches->data); - const GList *options; - - options = mate_mixer_switch_list_options (swtch); - + const GList *options; + MateMixerSwitch *swtch = MATE_MIXER_SWITCH (switches->data); MateMixerSwitchOption *active = mate_mixer_switch_get_active_option (swtch); - g_print ("Switch %s\n", - mate_mixer_switch_get_name (swtch)); + g_print ("\tSwitch %s:\n" + "\t\tLabel : %s\n" + "\t\tRole : %s\n", + mate_mixer_switch_get_name (swtch), + mate_mixer_switch_get_label (swtch), + get_switch_role_string (mate_mixer_switch_get_role (swtch))); + g_print ("\tOptions:\n"); + + /* Read a list of switch options that belong to the switch */ + options = mate_mixer_switch_list_options (swtch); while (options != NULL) { MateMixerSwitchOption *option = MATE_MIXER_SWITCH_OPTION (options->data); - g_print (" |%c| %s (icon: %s)\n", - (option == active) + g_print ("\t\t|%c| %s\n", + (active != NULL && option == active) ? '*' : '-', - mate_mixer_switch_option_get_label (option), - mate_mixer_switch_option_get_icon (option)); + mate_mixer_switch_option_get_label (option)); options = options->next; } + g_print ("\n"); switches = switches->next; } - g_print ("\n"); - streams = streams->next; } } @@ -306,7 +295,7 @@ connected (void) } static void -state_cb (void) +on_context_state_notify (void) { MateMixerState state; @@ -314,6 +303,8 @@ state_cb (void) switch (state) { case MATE_MIXER_STATE_READY: + /* This state can be reached repeatedly if the context is connected + * to a sound server, the connection is dropped and then reestablished */ connected (); break; case MATE_MIXER_STATE_FAILED: @@ -326,35 +317,36 @@ state_cb (void) } static void -device_added_cb (MateMixerContext *context, const gchar *name) +on_context_device_added (MateMixerContext *context, const gchar *name) { g_print ("Device added: %s\n", name); } static void -device_removed_cb (MateMixerContext *context, const gchar *name) +on_context_device_removed (MateMixerContext *context, const gchar *name) { g_print ("Device removed: %s\n", name); } static void -stream_added_cb (MateMixerContext *context, const gchar *name) +on_context_stream_added (MateMixerContext *context, const gchar *name) { g_print ("Stream added: %s\n", name); } static void -stream_removed_cb (MateMixerContext *context, const gchar *name) +on_context_stream_removed (MateMixerContext *context, const gchar *name) { g_print ("Stream removed: %s\n", name); } #ifdef G_OS_UNIX static gboolean -signal_cb (gpointer mainloop) +on_signal (gpointer mainloop) { g_idle_add ((GSourceFunc) g_main_loop_quit, mainloop); - return FALSE; + + return G_SOURCE_REMOVE; } #endif @@ -363,9 +355,8 @@ int main (int argc, char *argv[]) MateMixerState state; GOptionContext *ctx; gchar *backend = NULL; - gchar *server = NULL; - GError *error = NULL; - + gchar *server = NULL; + GError *error = NULL; GOptionEntry entries[] = { { "backend", 'b', 0, G_OPTION_ARG_STRING, &backend, "Sound system to use (pulseaudio, alsa, oss, null)", NULL }, { "server", 's', 0, G_OPTION_ARG_STRING, &server, "Sound server address", NULL }, @@ -376,76 +367,80 @@ int main (int argc, char *argv[]) g_option_context_add_main_entries (ctx, entries, NULL); - if (!g_option_context_parse (ctx, &argc, &argv, &error)) { + if (g_option_context_parse (ctx, &argc, &argv, &error) == FALSE) { g_printerr ("%s\n", error->message); g_error_free (error); + g_option_context_free (ctx); return 1; } - /* Initialize the library, if the function returns FALSE, it is not usable */ - if (!mate_mixer_init ()) + g_option_context_free (ctx); + + /* Initialize the library. + * If the function returns FALSE, the library is not usable. */ + if (mate_mixer_init () == FALSE) return 1; setlocale (LC_ALL, ""); - /* Set up the contextler, through which we access the main functionality */ + /* Create a libmatemixer context to access the library */ context = mate_mixer_context_new (); - /* Some details about our application, only used with the PulseAudio backend */ + /* Fill in some details about our application, only used with the PulseAudio backend */ mate_mixer_context_set_app_name (context, "MateMixer Monitor"); mate_mixer_context_set_app_id (context, "org.mate-desktop.libmatemixer-monitor"); mate_mixer_context_set_app_version (context, "1.0"); - mate_mixer_context_set_app_icon (context, "multimedia-volume-context"); + mate_mixer_context_set_app_icon (context, "multimedia-volume-control"); - if (backend) { - if (!strcmp (backend, "pulseaudio")) + if (backend != NULL) { + if (strcmp (backend, "pulseaudio") == 0) mate_mixer_context_set_backend_type (context, MATE_MIXER_BACKEND_PULSEAUDIO); - else if (!strcmp (backend, "alsa")) + else if (strcmp (backend, "alsa") == 0) mate_mixer_context_set_backend_type (context, MATE_MIXER_BACKEND_ALSA); - else if (!strcmp (backend, "oss")) + else if (strcmp (backend, "oss") == 0) mate_mixer_context_set_backend_type (context, MATE_MIXER_BACKEND_OSS); - else if (!strcmp (backend, "null")) + else if (strcmp (backend, "null") == 0) mate_mixer_context_set_backend_type (context, MATE_MIXER_BACKEND_NULL); else - g_printerr ("Sound system backend '%s' is unknown, it will be auto-detected.\n", + g_printerr ("Sound system backend '%s' is unknown, the backend will be auto-detected.\n", backend); g_free (backend); } - if (server) { + /* Set PulseAudio server address if requested */ + if (server != NULL) { mate_mixer_context_set_server_address (context, server); g_free (server); } - /* Initiate connection to the sound server */ - if (!mate_mixer_context_open (context)) { + /* Initiate connection to a sound system */ + if (mate_mixer_context_open (context) == FALSE) { + g_printerr ("Could not connect to a sound system, quitting.\n"); g_object_unref (context); return 1; } + /* Connect to some basic signals of the context */ g_signal_connect (G_OBJECT (context), "device-added", - G_CALLBACK (device_added_cb), + G_CALLBACK (on_context_device_added), NULL); g_signal_connect (G_OBJECT (context), "device-removed", - G_CALLBACK (device_removed_cb), + G_CALLBACK (on_context_device_removed), NULL); g_signal_connect (G_OBJECT (context), "stream-added", - G_CALLBACK (stream_added_cb), + G_CALLBACK (on_context_stream_added), NULL); g_signal_connect (G_OBJECT (context), "stream-removed", - G_CALLBACK (stream_removed_cb), + G_CALLBACK (on_context_stream_removed), NULL); - /* If mate_mixer_context_open() returns TRUE, the state will be either - * MATE_MIXER_STATE_READY or MATE_MIXER_STATE_CONNECTING. - * - * In case mate_mixer_context_open() returned FALSE, the current state - * would be MATE_MIXER_STATE_FAILED */ + /* When mate_mixer_context_open() returns TRUE, the state must be either + * MATE_MIXER_STATE_READY or MATE_MIXER_STATE_CONNECTING. */ state = mate_mixer_context_get_state (context); switch (state) { @@ -455,10 +450,11 @@ int main (int argc, char *argv[]) case MATE_MIXER_STATE_CONNECTING: g_print ("Waiting for connection...\n"); - /* Wait for the state transition */ - g_signal_connect (context, + /* The state will change asynchronously to either MATE_MIXER_STATE_READY + * or MATE_MIXER_STATE_FAILED, wait for the change in a main loop */ + g_signal_connect (G_OBJECT (context), "notify::state", - G_CALLBACK (state_cb), + G_CALLBACK (on_context_state_notify), NULL); break; default: @@ -469,13 +465,12 @@ int main (int argc, char *argv[]) mainloop = g_main_loop_new (NULL, FALSE); #ifdef G_OS_UNIX - g_unix_signal_add (SIGTERM, signal_cb, mainloop); - g_unix_signal_add (SIGINT, signal_cb, mainloop); + g_unix_signal_add (SIGTERM, on_signal, mainloop); + g_unix_signal_add (SIGINT, on_signal, mainloop); #endif g_main_loop_run (mainloop); g_object_unref (context); - return 0; } |