/* * Copyright (C) 2014 Michal Ratajsky * * This library 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, * 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 . */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "oss4-backend.h" #include "oss4-common.h" #include "oss4-device.h" #define BACKEND_NAME "OSS4" #define BACKEND_PRIORITY 8 #define PATH_SNDSTAT "/dev/sndstat" struct _Oss4BackendPrivate { gint fd; gchar *sndstat; GHashTable *devices; GHashTable *streams; MateMixerStream *default_input; MateMixerStream *default_output; MateMixerState state; }; enum { PROP_0, PROP_STATE, PROP_DEFAULT_INPUT, PROP_DEFAULT_OUTPUT }; static void mate_mixer_backend_interface_init (MateMixerBackendInterface *iface); static void oss4_backend_class_init (Oss4BackendClass *klass); static void oss4_backend_class_finalize (Oss4BackendClass *klass); static void oss4_backend_get_property (GObject *object, guint param_id, GValue *value, GParamSpec *pspec); static void oss4_backend_init (Oss4Backend *oss); static void oss4_backend_dispose (GObject *object); static void oss4_backend_finalize (GObject *object); G_DEFINE_DYNAMIC_TYPE_EXTENDED (Oss4Backend, oss4_backend, G_TYPE_OBJECT, 0, G_IMPLEMENT_INTERFACE_DYNAMIC (MATE_MIXER_TYPE_BACKEND, mate_mixer_backend_interface_init)) static gboolean oss4_backend_open (MateMixerBackend *backend); static void oss4_backend_close (MateMixerBackend *backend); static GList * oss4_backend_list_devices (MateMixerBackend *backend); static GList * oss4_backend_list_streams (MateMixerBackend *backend); static void change_state (Oss4Backend *oss, MateMixerState state); static gboolean read_device (Oss4Backend *oss, gint index); static gchar * read_device_sndstat_description (Oss4Backend *oss, const gchar *prefix); static void add_device (Oss4Backend *oss, Oss4Device *device); static void remove_device (Oss4Backend *oss, Oss4Device *device); static MateMixerBackendInfo info; void backend_module_init (GTypeModule *module) { oss4_backend_register_type (module); info.name = BACKEND_NAME; info.priority = BACKEND_PRIORITY; info.g_type = OSS4_TYPE_BACKEND; info.backend_type = MATE_MIXER_BACKEND_OSS4; } const MateMixerBackendInfo *backend_module_get_info (void) { return &info; } static void mate_mixer_backend_interface_init (MateMixerBackendInterface *iface) { iface->open = oss4_backend_open; iface->close = oss4_backend_close; iface->list_devices = oss4_backend_list_devices; iface->list_streams = oss4_backend_list_streams; } static void oss4_backend_class_init (Oss4BackendClass *klass) { GObjectClass *object_class; object_class = G_OBJECT_CLASS (klass); object_class->dispose = oss4_backend_dispose; object_class->finalize = oss4_backend_finalize; object_class->get_property = oss4_backend_get_property; g_object_class_override_property (object_class, PROP_STATE, "state"); g_object_class_override_property (object_class, PROP_DEFAULT_INPUT, "default-input"); g_object_class_override_property (object_class, PROP_DEFAULT_OUTPUT, "default-output"); g_type_class_add_private (object_class, sizeof (Oss4BackendPrivate)); } /* Called in the code generated by G_DEFINE_DYNAMIC_TYPE_EXTENDED() */ static void oss4_backend_class_finalize (Oss4BackendClass *klass) { } static void oss4_backend_get_property (GObject *object, guint param_id, GValue *value, GParamSpec *pspec) { Oss4Backend *oss; oss = OSS4_BACKEND (object); switch (param_id) { case PROP_STATE: g_value_set_enum (value, oss->priv->state); break; case PROP_DEFAULT_INPUT: g_value_set_object (value, oss->priv->default_input); break; case PROP_DEFAULT_OUTPUT: g_value_set_object (value, oss->priv->default_output); break; break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec); break; } } static void oss4_backend_init (Oss4Backend *oss) { oss->priv = G_TYPE_INSTANCE_GET_PRIVATE (oss, OSS4_TYPE_BACKEND, Oss4BackendPrivate); oss->priv->devices = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, g_object_unref); oss->priv->streams = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_object_unref); } static void oss4_backend_dispose (GObject *object) { oss4_backend_close (MATE_MIXER_BACKEND (object)); } static void oss4_backend_finalize (GObject *object) { Oss4Backend *oss; oss = OSS4_BACKEND (object); g_hash_table_destroy (oss->priv->devices); g_hash_table_destroy (oss->priv->streams); } static gboolean oss4_backend_open (MateMixerBackend *backend) { Oss4Backend *oss; gint fd; gint i; gint ret; struct oss_sysinfo info; g_return_val_if_fail (OSS4_IS_BACKEND (backend), FALSE); oss = OSS4_BACKEND (backend); fd = g_open ("/dev/mixer", O_RDONLY, 0); if (fd == -1) fd = g_open ("/dev/mixer0", O_RDONLY, 0); if (fd == -1) { change_state (oss, MATE_MIXER_STATE_FAILED); return FALSE; } /* Query the number of mixer devices */ ret = ioctl (fd, OSS_SYSINFO, &info); if (ret == -1) { close (fd); change_state (oss, MATE_MIXER_STATE_FAILED); return FALSE; } g_debug ("The sound system is %s version %s", info.product, info.version); #if !defined(__linux__) /* At least on systems based on FreeBSD we will need to read devices names * from the sndstat file, but avoid even trying that on systems where this * is not needed and the file is not present */ oss->priv->sndstat = PATH_SNDSTAT; #endif oss->priv->fd = fd; for (i = 0; i < info.nummixers; i++) read_device (oss, i); change_state (oss, MATE_MIXER_STATE_READY); return TRUE; } void oss4_backend_close (MateMixerBackend *backend) { Oss4Backend *oss; g_return_if_fail (OSS4_IS_BACKEND (backend)); oss = OSS4_BACKEND (backend); g_clear_object (&oss->priv->default_input); g_clear_object (&oss->priv->default_output); g_hash_table_remove_all (oss->priv->streams); g_hash_table_remove_all (oss->priv->devices); } static GList * oss4_backend_list_devices (MateMixerBackend *backend) { GList *list; g_return_val_if_fail (OSS4_IS_BACKEND (backend), NULL); /* Convert the hash table to a sorted linked list, this list is expected * to be cached in the main library */ list = g_hash_table_get_values (OSS4_BACKEND (backend)->priv->devices); if (list != NULL) { g_list_foreach (list, (GFunc) g_object_ref, NULL); return list; } return NULL; } static GList * oss4_backend_list_streams (MateMixerBackend *backend) { GList *list; g_return_val_if_fail (OSS4_IS_BACKEND (backend), NULL); /* Convert the hash table to a sorted linked list, this list is expected * to be cached in the main library */ list = g_hash_table_get_values (OSS4_BACKEND (backend)->priv->streams); if (list != NULL) { g_list_foreach (list, (GFunc) g_object_ref, NULL); return list; } return NULL; } static void change_state (Oss4Backend *oss, MateMixerState state) { if (oss->priv->state == state) return; oss->priv->state = state; g_object_notify (G_OBJECT (oss), "state"); } static gboolean read_device (Oss4Backend *oss, gint index) { Oss4Device *device; gboolean ret; gchar *description = NULL; struct oss_mixerinfo info; /* We assume that the name and capabilities of a device do not change */ device = g_hash_table_lookup (oss->priv->devices, GINT_TO_POINTER (index)); if (G_UNLIKELY (device != NULL)) { g_debug ("Attempt to re-read already know device with index %d", index); return TRUE; } info.dev = index; ret = ioctl (oss->priv->fd, SNDCTL_MIXERINFO, &info); if (ret == -1) { g_debug ("Failed to read mixer info: %s", g_strerror (errno)); return FALSE; } if (info.enabled == 0) return TRUE; /* Use the id as the device name and try to figure out the name of the * sound card from the sndstat file if it is available, otherwise use * the name from the mixer info */ if (oss->priv->sndstat != NULL && g_str_has_prefix (info.name, "pcm") == TRUE) description = read_device_sndstat_description (oss, info.name); if (description == NULL) description = g_strdup (info.name); device = oss4_device_new (info.id, description, oss->priv->fd, index); ret = oss4_device_read (device); if (ret == TRUE) add_device (oss, device); g_object_unref (device); g_free (description); return ret; } static gchar * read_device_sndstat_description (Oss4Backend *oss, const gchar *prefix) { FILE *fp; gchar line[256]; gchar *description = NULL; g_debug ("reading prefix %s", prefix); fp = fopen (oss->priv->sndstat, "r"); if (fp == NULL) { g_warning ("Failed to read %s: %s", oss->priv->sndstat, g_strerror (errno)); return FALSE; } while (fgets (line, sizeof (line), fp) != NULL) { gchar *p; if (g_str_has_prefix (line, prefix) == FALSE) continue; /* Example line: * pcm0: (play) default */ p = strchr (line, '<'); if (p != NULL && *p && *(++p)) { gchar *end = strchr (p, '>'); if (end != NULL) description = g_strndup (p, end - p); } // XXX we can also read "default" at the end of the line // XXX http://ashish.is.lostca.se/2011/05/23/default-sound-device-in-freebsd/ if (g_str_has_suffix (line, "default") || g_str_has_suffix (line, "default)")) ; if (description != NULL) break; } fclose (fp); return description; } static void add_device (Oss4Backend *oss, Oss4Device *device) { MateMixerStream *stream; /* Add device, file path is used as the key rather than the name, because * the name is not known until an OssDevice instance is created */ g_hash_table_insert (oss->priv->devices, GINT_TO_POINTER (oss4_device_get_index (device)), g_object_ref (device)); g_signal_emit_by_name (G_OBJECT (oss), "device-added", mate_mixer_device_get_name (MATE_MIXER_DEVICE (device))); /* Add streams if they exist */ stream = oss4_device_get_input_stream (device); if (stream != NULL) { g_hash_table_insert (oss->priv->streams, g_strdup (mate_mixer_stream_get_name (stream)), g_object_ref (stream)); g_signal_emit_by_name (G_OBJECT (oss), "stream-added", mate_mixer_stream_get_name (stream)); } stream = oss4_device_get_output_stream (device); if (stream != NULL) { g_hash_table_insert (oss->priv->streams, g_strdup (mate_mixer_stream_get_name (stream)), g_object_ref (stream)); g_signal_emit_by_name (G_OBJECT (oss), "stream-added", mate_mixer_stream_get_name (stream)); } } static void remove_device (Oss4Backend *oss, Oss4Device *device) { MateMixerStream *stream; /* Remove the device streams first as they are a part of the device */ stream = oss4_device_get_input_stream (device); if (stream != NULL) { const gchar *name = mate_mixer_stream_get_name (stream); g_hash_table_remove (oss->priv->streams, name); g_signal_emit_by_name (G_OBJECT (oss), "stream-removed", name); } stream = oss4_device_get_output_stream (device); if (stream != NULL) { const gchar *name = mate_mixer_stream_get_name (stream); g_hash_table_remove (oss->priv->streams, stream); g_signal_emit_by_name (G_OBJECT (oss), "stream-removed", name); } /* Remove the device */ g_object_ref (device); g_hash_table_remove (oss->priv->devices, GINT_TO_POINTER (oss4_device_get_index (device))); g_signal_emit_by_name (G_OBJECT (oss), "device-removed", mate_mixer_device_get_name (MATE_MIXER_DEVICE (device))); g_object_unref (device); }