[pulseaudio-discuss] [PATCH 3/6] Add a new module switch-on-port-available that acts on port changes
David Henningsson
david.henningsson at canonical.com
Wed Feb 22 22:17:04 PST 2012
This module tries to switch to a port when availability changes to
"YES", and tries to switch away when availability changes to "NO".
Once there is a priority list infrastructure in place and ready,
this functionality might be redundant, but this will do as an
interim solution.
---
src/Makefile.am | 6 +
src/modules/module-switch-on-port-available.c | 218 +++++++++++++++++++++++++
2 files changed, 224 insertions(+), 0 deletions(-)
create mode 100644 src/modules/module-switch-on-port-available.c
diff --git a/src/Makefile.am b/src/Makefile.am
index 3e450c0..af0d5e8 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1020,6 +1020,7 @@ modlibexec_LTLIBRARIES += \
module-virtual-sink.la \
module-virtual-source.la \
module-switch-on-connect.la \
+ module-switch-on-port-available.la \
module-filter-apply.la \
module-filter-heuristics.la
@@ -1325,6 +1326,7 @@ SYMDEF_FILES = \
module-virtual-sink-symdef.h \
module-virtual-source-symdef.h \
module-switch-on-connect-symdef.h \
+ module-switch-on-port-available-symdef.h \
module-filter-apply-symdef.h \
module-filter-heuristics-symdef.h
@@ -1491,6 +1493,10 @@ module_switch_on_connect_la_SOURCES = modules/module-switch-on-connect.c
module_switch_on_connect_la_LDFLAGS = $(MODULE_LDFLAGS)
module_switch_on_connect_la_LIBADD = $(MODULE_LIBADD)
+module_switch_on_port_available_la_SOURCES = modules/module-switch-on-port-available.c
+module_switch_on_port_available_la_LDFLAGS = $(MODULE_LDFLAGS)
+module_switch_on_port_available_la_LIBADD = $(MODULE_LIBADD)
+
module_filter_apply_la_SOURCES = modules/module-filter-apply.c
module_filter_apply_la_LDFLAGS = $(MODULE_LDFLAGS)
module_filter_apply_la_LIBADD = $(MODULE_LIBADD)
diff --git a/src/modules/module-switch-on-port-available.c b/src/modules/module-switch-on-port-available.c
new file mode 100644
index 0000000..96f9214
--- /dev/null
+++ b/src/modules/module-switch-on-port-available.c
@@ -0,0 +1,218 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2006 Lennart Poettering
+ Copyright 2011 Canonical Ltd
+
+ 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 2.1 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 <pulsecore/core.h>
+#include <pulsecore/device-port.h>
+#include <pulsecore/hashmap.h>
+
+#include "module-switch-on-port-available-symdef.h"
+
+struct userdata {
+ pa_hook_slot *callback_slot;
+};
+
+static pa_device_port* find_best_port(pa_hashmap *ports) {
+ void *state;
+ pa_device_port* port, *result = NULL;
+
+ PA_HASHMAP_FOREACH(port, ports, state) {
+ if (result == NULL ||
+ result->available == PA_PORT_AVAILABLE_NO ||
+ (port->available != PA_PORT_AVAILABLE_NO && port->priority > result->priority)) {
+ result = port;
+ }
+ }
+ return result;
+}
+
+static pa_bool_t try_to_switch_profile(pa_card *card, pa_device_port *port) {
+ pa_card_profile *best_profile = NULL, *profile;
+ void *state;
+
+ pa_log_debug("Finding best profile");
+ if (port->profiles)
+ PA_HASHMAP_FOREACH(profile, port->profiles, state) {
+ if (best_profile && best_profile->priority >= profile->priority)
+ continue;
+ /* We make a best effort to keep other direction unchanged */
+ if (card->active_profile && !port->is_input) {
+ if (card->active_profile->n_sources != profile->n_sources)
+ continue;
+ if (card->active_profile->max_source_channels != profile->max_source_channels)
+ continue;
+ }
+ if (card->active_profile && !port->is_output) {
+ if (card->active_profile->n_sinks != profile->n_sinks)
+ continue;
+ if (card->active_profile->max_sink_channels != profile->max_sink_channels)
+ continue;
+ }
+ best_profile = profile;
+ }
+
+ if (!best_profile) {
+ pa_log_debug("No suitable profile found");
+ return FALSE;
+ }
+ if (pa_card_set_profile(card, best_profile->name, FALSE) != 0) {
+ pa_log_debug("Could not set profile %s", best_profile->name);
+ return FALSE;
+ }
+ return TRUE;
+}
+
+static void find_sink_and_source(pa_card *card, pa_device_port *port, pa_sink **si, pa_source **so)
+{
+ pa_sink *sink = NULL;
+ pa_source *source = NULL;
+ uint32_t state;
+
+ if (port->is_output)
+ PA_IDXSET_FOREACH(sink, card->sinks, state)
+ if (sink->ports && port == pa_hashmap_get(sink->ports, port->name))
+ break;
+
+ if (port->is_input)
+ PA_IDXSET_FOREACH(source, card->sources, state)
+ if (source->ports && port == pa_hashmap_get(source->ports, port->name))
+ break;
+
+ *si = sink;
+ *so = source;
+}
+
+static pa_hook_result_t port_available_hook_callback(pa_core *c, pa_device_port *port, void* userdata) {
+ uint32_t state;
+ pa_card* card;
+ pa_sink *sink;
+ pa_source *source;
+ pa_bool_t is_active_profile, is_active_port;
+
+ pa_log_debug("finding port %s", port->name);
+ PA_IDXSET_FOREACH(card, c->cards, state)
+ if (card->ports && port == pa_hashmap_get(card->ports, port->name))
+ break;
+
+ if (!card) {
+ pa_log_warn("Did not find port %s in array of cards", port->name);
+ return PA_HOOK_OK;
+ }
+
+ find_sink_and_source(card, port, &sink, &source);
+
+ is_active_profile = port->profiles && card->active_profile &&
+ card->active_profile == pa_hashmap_get(port->profiles, card->active_profile->name);
+ is_active_port = (sink && sink->active_port == port) || (source && source->active_port == port);
+
+ if (port->available == PA_PORT_AVAILABLE_NO && !is_active_port)
+ return PA_HOOK_OK;
+
+ if (port->available == PA_PORT_AVAILABLE_YES) {
+ if (is_active_port)
+ return PA_HOOK_OK;
+ if (!is_active_profile) {
+ if (!try_to_switch_profile(card, port))
+ return PA_HOOK_OK;
+ pa_assert(card->active_profile == pa_hashmap_get(port->profiles, card->active_profile->name));
+ /* Now that profile has changed, our sink and source pointers must be updated */
+ find_sink_and_source(card, port, &sink, &source);
+ }
+
+ if (source)
+ pa_source_set_port(source, port->name, FALSE);
+ if (sink)
+ pa_sink_set_port(sink, port->name, FALSE);
+ }
+
+ if (port->available == PA_PORT_AVAILABLE_NO) {
+ if (sink) {
+ pa_device_port *p2 = NULL;
+ p2 = find_best_port(sink->ports);
+ if (p2 && p2->available != PA_PORT_AVAILABLE_NO)
+ pa_sink_set_port(sink, p2->name, FALSE);
+ else {
+ /* Maybe try to switch to another profile? */
+ }
+ }
+
+ if (source) {
+ pa_device_port *p2 = NULL;
+ p2 = find_best_port(source->ports);
+ if (p2 && p2->available != PA_PORT_AVAILABLE_NO)
+ pa_source_set_port(source, p2->name, FALSE);
+ else {
+ /* Maybe try to switch to another profile? */
+ }
+ }
+ }
+
+ return PA_HOOK_OK;
+}
+
+static void handle_all_unavailable(pa_core *core) {
+ pa_card *card;
+ uint32_t state;
+
+ PA_IDXSET_FOREACH(card, core->cards, state) {
+ pa_device_port *port;
+ void *state2;
+ if (!card->ports)
+ continue;
+ PA_HASHMAP_FOREACH(port, card->ports, state2) {
+ if (port->available == PA_PORT_AVAILABLE_NO)
+ port_available_hook_callback(core, port, NULL);
+ }
+ }
+}
+
+int pa__init(pa_module*m) {
+ struct userdata *u;
+
+ pa_assert(m);
+
+ m->userdata = u = pa_xnew(struct userdata, 1);
+
+ u->callback_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_PORT_AVAILABLE_CHANGED],
+ PA_HOOK_LATE, (pa_hook_cb_t) port_available_hook_callback, u);
+
+ handle_all_unavailable(m->core);
+
+ return 0;
+}
+
+void pa__done(pa_module*m) {
+ struct userdata *u;
+
+ pa_assert(m);
+
+ if (!(u = m->userdata))
+ return;
+
+ if (u->callback_slot)
+ pa_hook_slot_free(u->callback_slot);
+
+ pa_xfree(u);
+}
--
1.7.9
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