actually create pa_card object in module-alsa-card

src/modules/alsa/module-alsa-card.c

@@ -23,6 +23,10 @@
 #include <config.h>
 #endif
 
+#include <pulse/xmalloc.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/modargs.h>
+
 #include "alsa-util.h"
 #include "module-alsa-card-symdef.h"
 
@@ -30,27 +34,163 @@ PA_MODULE_AUTHOR("Lennart Poettering");
 PA_MODULE_DESCRIPTION("ALSA Card");
 PA_MODULE_VERSION(PACKAGE_VERSION);
 PA_MODULE_LOAD_ONCE(FALSE);
+PA_MODULE_USAGE(
+        "name=<name for the sink/source> "
+        "device_id=<ALSA card index> "
+        "format=<sample format> "
+        "rate=<sample rate> "
+        "fragments=<number of fragments> "
+        "fragment_size=<fragment size> "
+        "mmap=<enable memory mapping?> "
+        "tsched=<enable system timer based scheduling mode?> "
+        "tsched_buffer_size=<buffer size when using timer based scheduling> "
+        "tsched_buffer_watermark=<lower fill watermark> "
+        "profile=<profile name>");
+
+static const char* const valid_modargs[] = {
+    "sink_name",
+    "device",
+    "device_id",
+    "format",
+    "rate",
+    "channels",
+    "channel_map",
+    "fragments",
+    "fragment_size",
+    "mmap",
+    "tsched",
+    "tsched_buffer_size",
+    "tsched_buffer_watermark",
+    NULL
+};
+
+#define DEFAULT_DEVICE_ID "0"
+
+struct userdata {
+    pa_core *core;
+    pa_module *module;
+
+    char *device_id;
+
+    pa_card *card;
+};
+
+struct profile_data {
+    const pa_alsa_profile_info *sink, *source;
+};
 
 static void enumerate_cb(
         const pa_alsa_profile_info *sink,
         const pa_alsa_profile_info *source,
         void *userdata) {
 
-    if (sink && source)
-        pa_log("Found Output %s + Input %s", sink->description, source->description);
-    else if (sink)
-        pa_log("Found Output %s", sink->description);
-    else if (source)
-        pa_log("Found Input %s", source->description);
+    pa_hashmap *profiles = (pa_hashmap *) userdata;
+    char *t, *n;
+    pa_card_profile *p;
+    struct profile_data *d;
 
+    if (sink && source) {
+        n = pa_sprintf_malloc("%s+%s", sink->name, source->name);
+        t = pa_sprintf_malloc("Output %s + Input %s", sink->description, source->description);
+    } else if (sink) {
+        n = pa_xstrdup(sink->name);
+        t = pa_sprintf_malloc("Output %s", sink->description);
+    } else {
+        pa_assert(source);
+        n = pa_xstrdup(source->name);
+        t = pa_sprintf_malloc("Input %s", source->description);
+    }
+
+    pa_log_info("Found output profile '%s'", t);
+
+    p = pa_card_profile_new(n, t, sizeof(struct profile_data));
+
+    pa_xfree(t);
+    pa_xfree(n);
+
+    p->n_sinks = !!sink;
+    p->n_sources = !!source;
+
+    if (sink)
+        p->max_sink_channels = sink->map.channels;
+    if (source)
+        p->max_source_channels = source->map.channels;
+
+    d = PA_CARD_PROFILE_DATA(p);
+
+    d->sink = sink;
+    d->source = source;
+
+    pa_hashmap_put(profiles, p->name, p);
 }
 
 int pa__init(pa_module*m) {
+    pa_card_new_data data;
+    pa_modargs *ma;
+    int alsa_card_index;
+    struct userdata *u;
+
     pa_alsa_redirect_errors_inc();
-    pa_alsa_probe_profiles("1", &m->core->default_sample_spec, enumerate_cb, m);
+
+    pa_assert(m);
+
+    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+        pa_log("Failed to parse module arguments");
+        goto fail;
+    }
+
+    m->userdata = u = pa_xnew0(struct userdata, 1);
+    u->core = m->core;
+    u->module = m;
+    u->device_id = pa_xstrdup(pa_modargs_get_value(ma, "device_id", DEFAULT_DEVICE_ID));
+
+    if ((alsa_card_index = snd_card_get_index(u->device_id)) < 0) {
+        pa_log("Card '%s' doesn't exist: %s", u->device_id, snd_strerror(alsa_card_index));
+        goto fail;
+    }
+
+    pa_card_new_data_init(&data);
+    data.driver = __FILE__;
+    data.module = m;
+    pa_alsa_init_proplist_card(data.proplist, alsa_card_index);
+    pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, u->device_id);
+    pa_card_new_data_set_name(&data, pa_modargs_get_value(ma, "name", u->device_id));
+
+    data.profiles = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
+    if (pa_alsa_probe_profiles(u->device_id, &m->core->default_sample_spec, enumerate_cb, data.profiles) < 0) {
+        pa_card_new_data_done(&data);
+        goto fail;
+    }
+
+    u->card = pa_card_new(m->core, &data);
+    pa_card_new_data_done(&data);
+
     return 0;
+
+fail:
+
+    if (ma)
+        pa_modargs_free(ma);
+
+    pa__done(m);
+    return -1;
 }
 
 void pa__done(pa_module*m) {
+    struct userdata *u;
+
+    pa_assert(m);
+
+    if (!(u = m->userdata))
+        goto finish;
+
+    if (u->card)
+        pa_card_free(u->card);
+
+    pa_xfree(u->device_id);
+    pa_xfree(u);
+
+finish:
+    snd_config_update_free_global();
     pa_alsa_redirect_errors_dec();
 }

src/pulsecore/card.c

@@ -36,13 +36,14 @@
 
 #include "card.h"
 
-pa_card_profile *pa_card_profile_new(const char *name) {
+pa_card_profile *pa_card_profile_new(const char *name, const char *description, size_t extra) {
     pa_card_profile *c;
 
     pa_assert(name);
 
-    c = pa_xnew0(pa_card_profile, 1);
+    c = pa_xmalloc(PA_ALIGN(sizeof(pa_card_profile)) + extra);
     c->name = pa_xstrdup(name);
+    c->description = pa_xstrdup(description);
 
     return c;
 }
@@ -51,6 +52,7 @@ void pa_card_profile_free(pa_card_profile *c) {
     pa_assert(c);
 
     pa_xfree(c->name);
+    pa_xfree(c->description);
     pa_xfree(c);
 }
 
@@ -122,7 +124,9 @@ pa_card *pa_card_new(pa_core *core, pa_card_new_data *data) {
 
     c->profiles = data->profiles;
     data->profiles = NULL;
-    c->active_profile = data->active_profile;
+    if (!(c->active_profile = data->active_profile))
+        if (c->profiles)
+            c->active_profile = pa_hashmap_first(c->profiles);
     data->active_profile = NULL;
 
     c->userdata = NULL;
@@ -189,6 +193,9 @@ int pa_card_set_profile(pa_card *c, const char *name) {
     if (!(profile = pa_hashmap_get(c->profiles, name)))
         return -1;
 
+    if (c->active_profile == profile)
+        return 0;
+
     if (c->set_profile(c, profile) < 0)
         return -1;
 

src/pulsecore/card.h

@@ -31,17 +31,20 @@ typedef struct pa_card pa_card;
 
 typedef struct pa_card_profile {
     char *name;
+    char *description;
 
-    pa_bool_t optical_sink:1;
-    pa_bool_t optical_source:1;
-
+    /* We probably want to have different properties later on here */
     unsigned n_sinks;
     unsigned n_sources;
 
     unsigned max_sink_channels;
     unsigned max_source_channels;
+
+    /* .. followed by some implementation specific data */
 } pa_card_profile;
 
+#define PA_CARD_PROFILE_DATA(d) ((void*) ((uint8_t*) d + PA_ALIGN(sizeof(pa_card_profile))))
+
 struct pa_card {
     uint32_t index;
     pa_core *core;
@@ -65,6 +68,7 @@ struct pa_card {
 
 typedef struct pa_card_new_data {
     char *name;
+    char *description;
 
     pa_proplist *proplist;
     const char *driver;
@@ -76,7 +80,7 @@ typedef struct pa_card_new_data {
     pa_bool_t namereg_fail:1;
 } pa_card_new_data;
 
-pa_card_profile *pa_card_profile_new(const char *name);
+pa_card_profile *pa_card_profile_new(const char *name, const char *description, size_t extra);
 void pa_card_profile_free(pa_card_profile *c);
 
 pa_card_new_data *pa_card_new_data_init(pa_card_new_data *data);