1 files changed, 360 insertions, 0 deletions

diff --git a/src/modules/alsa/module-alsa-card.c b/src/modules/alsa/module-alsa-card.c
new file mode 100644
index 00000000..e63414ec
--- /dev/null
+++ b/src/modules/alsa/module-alsa-card.c
@@ -0,0 +1,360 @@
+/***
+  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 <pulse/xmalloc.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/queue.h>
+
+#include "alsa-util.h"
+#include "alsa-sink.h"
+#include "alsa-source.h"
+#include "module-alsa-card-symdef.h"
+
+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 card/sink/source, to be prefixed> "
+        "card_name=<name for card> "
+        "sink_name=<name for sink> "
+        "source_name=<name for 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> "
+        "ignore_dB=<ignore dB information from the device?>");
+
+static const char* const valid_modargs[] = {
+    "name",
+    "card_name",
+    "sink_name",
+    "source_name",
+    "device_id",
+    "format",
+    "rate",
+    "fragments",
+    "fragment_size",
+    "mmap",
+    "tsched",
+    "tsched_buffer_size",
+    "tsched_buffer_watermark",
+    "profile",
+    "ignore_dB",
+    NULL
+};
+
+#define DEFAULT_DEVICE_ID "0"
+
+struct userdata {
+    pa_core *core;
+    pa_module *module;
+
+    char *device_id;
+
+    pa_card *card;
+    pa_sink *sink;
+    pa_source *source;
+
+    pa_modargs *modargs;
+};
+
+struct profile_data {
+    const pa_alsa_profile_info *sink_profile, *source_profile;
+};
+
+static void enumerate_cb(
+        const pa_alsa_profile_info *sink,
+        const pa_alsa_profile_info *source,
+        void *userdata) {
+
+    pa_hashmap *profiles = (pa_hashmap *) userdata;
+    char *t, *n;
+    pa_card_profile *p;
+    struct profile_data *d;
+
+    if (sink && source) {
+        n = pa_sprintf_malloc("output-%s+input-%s", sink->name, source->name);
+        t = pa_sprintf_malloc("Output %s + Input %s", sink->description, source->description);
+    } else if (sink) {
+        n = pa_sprintf_malloc("output-%s", sink->name);
+        t = pa_sprintf_malloc("Output %s", sink->description);
+    } else {
+        pa_assert(source);
+        n = pa_sprintf_malloc("input-%s", 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->priority = (sink ? sink->priority : 0)*100 + (source ? source->priority : 0);
+    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_profile = sink;
+    d->source_profile = source;
+
+    pa_hashmap_put(profiles, p->name, p);
+}
+
+static void add_disabled_profile(pa_hashmap *profiles) {
+    pa_card_profile *p;
+    struct profile_data *d;
+
+    p = pa_card_profile_new("off", "Off", sizeof(struct profile_data));
+
+    d = PA_CARD_PROFILE_DATA(p);
+    d->sink_profile = d->source_profile = NULL;
+
+    pa_hashmap_put(profiles, p->name, p);
+}
+
+static int card_set_profile(pa_card *c, pa_card_profile *new_profile) {
+    struct userdata *u;
+    struct profile_data *nd, *od;
+
+    pa_assert(c);
+    pa_assert(new_profile);
+    pa_assert_se(u = c->userdata);
+
+    nd = PA_CARD_PROFILE_DATA(new_profile);
+    od = PA_CARD_PROFILE_DATA(c->active_profile);
+
+    if (od->sink_profile != nd->sink_profile) {
+        pa_queue *inputs = NULL;
+
+        if (u->sink) {
+            if (nd->sink_profile)
+                inputs = pa_sink_move_all_start(u->sink);
+
+            pa_alsa_sink_free(u->sink);
+            u->sink = NULL;
+        }
+
+        if (nd->sink_profile) {
+            u->sink = pa_alsa_sink_new(c->module, u->modargs, __FILE__, c, nd->sink_profile);
+
+            if (inputs) {
+                if (u->sink)
+                    pa_sink_move_all_finish(u->sink, inputs, FALSE);
+                else
+                    pa_sink_move_all_fail(inputs);
+            }
+        }
+    }
+
+    if (od->source_profile != nd->source_profile) {
+        pa_queue *outputs = NULL;
+
+        if (u->source) {
+            if (nd->source_profile)
+                outputs = pa_source_move_all_start(u->source);
+
+            pa_alsa_source_free(u->source);
+            u->source = NULL;
+        }
+
+        if (nd->source_profile) {
+            u->source = pa_alsa_source_new(c->module, u->modargs, __FILE__, c, nd->source_profile);
+
+            if (outputs) {
+                if (u->source)
+                    pa_source_move_all_finish(u->source, outputs, FALSE);
+                else
+                    pa_source_move_all_fail(outputs);
+            }
+        }
+    }
+
+    return 0;
+}
+
+static void init_profile(struct userdata *u) {
+    struct profile_data *d;
+
+    pa_assert(u);
+
+    d = PA_CARD_PROFILE_DATA(u->card->active_profile);
+
+    if (d->sink_profile)
+        u->sink = pa_alsa_sink_new(u->module, u->modargs, __FILE__, u->card, d->sink_profile);
+
+    if (d->source_profile)
+        u->source = pa_alsa_source_new(u->module, u->modargs, __FILE__, u->card, d->source_profile);
+}
+
+static void set_card_name(pa_card_new_data *data, pa_modargs *ma, const char *device_id) {
+    char *t;
+    const char *n;
+
+    pa_assert(data);
+    pa_assert(ma);
+    pa_assert(device_id);
+
+    if ((n = pa_modargs_get_value(ma, "card_name", NULL))) {
+        pa_card_new_data_set_name(data, n);
+        data->namereg_fail = TRUE;
+        return;
+    }
+
+    if ((n = pa_modargs_get_value(ma, "name", NULL)))
+        data->namereg_fail = TRUE;
+    else {
+        n = device_id;
+        data->namereg_fail = FALSE;
+    }
+
+    t = pa_sprintf_malloc("alsa_card.%s", n);
+    pa_card_new_data_set_name(data, t);
+    pa_xfree(t);
+}
+
+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();
+    snd_config_update_free_global();
+
+    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_xnew(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));
+    u->card = NULL;
+    u->sink = NULL;
+    u->source = NULL;
+    u->modargs = ma;
+
+    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(m->core, data.proplist, alsa_card_index);
+    pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, u->device_id);
+    set_card_name(&data, ma, 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;
+    }
+
+    if (pa_hashmap_isempty(data.profiles)) {
+        pa_log("Failed to find a working profile.");
+        pa_card_new_data_done(&data);
+        goto fail;
+    }
+
+    add_disabled_profile(data.profiles);
+
+    u->card = pa_card_new(m->core, &data);
+    pa_card_new_data_done(&data);
+
+    if (!u->card)
+        goto fail;
+
+    u->card->userdata = u;
+    u->card->set_profile = card_set_profile;
+
+    init_profile(u);
+
+    return 0;
+
+fail:
+
+    pa__done(m);
+    return -1;
+}
+
+int pa__get_n_used(pa_module *m) {
+    struct userdata *u;
+
+    pa_assert(m);
+    pa_assert_se(u = m->userdata);
+
+    return
+        (u->sink ? pa_sink_linked_by(u->sink) : 0) +
+        (u->source ? pa_source_linked_by(u->source) : 0);
+}
+
+void pa__done(pa_module*m) {
+    struct userdata *u;
+
+    pa_assert(m);
+
+    if (!(u = m->userdata))
+        goto finish;
+
+    if (u->sink)
+        pa_alsa_sink_free(u->sink);
+
+    if (u->source)
+        pa_alsa_source_free(u->source);
+
+    if (u->card)
+        pa_card_free(u->card);
+
+    if (u->modargs)
+        pa_modargs_free(u->modargs);
+
+    pa_xfree(u->device_id);
+    pa_xfree(u);
+
+finish:
+    snd_config_update_free_global();
+    pa_alsa_redirect_errors_dec();
+}