add new pa_card object as a way to logically combine multiple sinks and sources

src/pulsecore/card.c

@@ -0,0 +1,196 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2009 Lennart Poettering
+
+  PulseAudio 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 License,
+  or (at your option) any later version.
+
+  PulseAudio 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
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/log.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/namereg.h>
+
+#include "card.h"
+
+pa_card_config *pa_card_config_new(const char *name) {
+    pa_card_config *c;
+
+    pa_assert(name);
+
+    c = pa_xnew0(pa_card_config, 1);
+    c->name = pa_xstrdup(name);
+
+    return c;
+}
+
+void pa_card_config_free(pa_card_config *c) {
+    pa_assert(c);
+
+    pa_xfree(c->name);
+    pa_xfree(c);
+}
+
+pa_card_new_data* pa_card_new_data_init(pa_card_new_data *data) {
+    pa_assert(data);
+
+    memset(data, 0, sizeof(*data));
+    data->proplist = pa_proplist_new();
+
+    return data;
+}
+
+void pa_card_new_data_set_name(pa_card_new_data *data, const char *name) {
+    pa_assert(data);
+
+    pa_xfree(data->name);
+    data->name = pa_xstrdup(name);
+}
+
+void pa_card_new_data_done(pa_card_new_data *data) {
+
+    pa_assert(data);
+
+    pa_proplist_free(data->proplist);
+
+    if (data->configs) {
+        pa_card_config *c;
+
+        while ((c = pa_hashmap_steal_first(data->configs)))
+            pa_card_config_free(c);
+
+        pa_hashmap_free(data->configs, NULL, NULL);
+    }
+
+    pa_xfree(data->name);
+}
+
+pa_card *pa_card_new(pa_core *core, pa_card_new_data *data) {
+    pa_card *c;
+    const char *name;
+
+    pa_core_assert_ref(core);
+    pa_assert(data);
+    pa_assert(data->name);
+
+    c = pa_xnew(pa_card, 1);
+
+    if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_CARD, c, data->namereg_fail))) {
+        pa_xfree(c);
+        return NULL;
+    }
+
+    pa_card_new_data_set_name(data, name);
+
+    if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_CARD_NEW], data) < 0) {
+        pa_xfree(c);
+        pa_namereg_unregister(core, name);
+        return NULL;
+    }
+
+    c->core = core;
+    c->name = pa_xstrdup(data->name);
+    c->proplist = pa_proplist_copy(data->proplist);
+    c->driver = pa_xstrdup(data->driver);
+    c->module = data->module;
+
+    c->sinks = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+    c->sources = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+
+    c->configs = data->configs;
+    data->configs = NULL;
+    c->active_config = data->active_config;
+    data->active_config = NULL;
+
+    c->userdata = NULL;
+    c->set_config = NULL;
+
+    pa_assert_se(pa_idxset_put(core->cards, c, &c->index) >= 0);
+
+    pa_log_info("Created %u \"%s\"", c->index, c->name);
+    pa_subscription_post(core, PA_SUBSCRIPTION_EVENT_CARD|PA_SUBSCRIPTION_EVENT_NEW, c->index);
+
+    pa_hook_fire(&core->hooks[PA_CORE_HOOK_CARD_PUT], c);
+    return c;
+}
+
+void pa_card_free(pa_card *c) {
+    pa_core *core;
+    pa_card_config *config;
+
+    pa_assert(c);
+    pa_assert(c->core);
+
+    core = c->core;
+
+    pa_hook_fire(&core->hooks[PA_CORE_HOOK_CARD_UNLINK], c);
+
+    pa_namereg_unregister(core, c->name);
+
+    pa_idxset_remove_by_data(c->core->cards, c, NULL);
+
+    pa_log_info("Freed %u \"%s\"", c->index, c->name);
+
+    pa_subscription_post(c->core, PA_SUBSCRIPTION_EVENT_CARD|PA_SUBSCRIPTION_EVENT_REMOVE, c->index);
+
+    pa_idxset_free(c->sinks, NULL, NULL);
+    pa_idxset_free(c->sources, NULL, NULL);
+
+    while ((config = pa_hashmap_steal_first(c->configs)))
+        pa_card_config_free(config);
+
+    pa_hashmap_free(c->configs, NULL, NULL);
+
+    pa_proplist_free(c->proplist);
+    pa_xfree(c->driver);
+    pa_xfree(c->name);
+    pa_xfree(c);
+
+    pa_core_check_idle(core);
+}
+
+int pa_card_set_config(pa_card *c, const char *name) {
+    pa_card_config *config;
+    pa_assert(c);
+
+    if (!c->set_config) {
+        pa_log_warn("set_config() operation not implemented for card %u", c->index);
+        return -1;
+    }
+
+    if (!c->configs)
+        return -1;
+
+    if (!(config = pa_hashmap_get(c->configs, name)))
+        return -1;
+
+    if (c->set_config(c, config) < 0)
+        return -1;
+
+    pa_subscription_post(c->core, PA_SUBSCRIPTION_EVENT_CARD|PA_SUBSCRIPTION_EVENT_CHANGE, c->index);
+
+    return 0;
+}