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-rw-r--r--src/modules/module-rescue-streams.c277
1 files changed, 277 insertions, 0 deletions
diff --git a/src/modules/module-rescue-streams.c b/src/modules/module-rescue-streams.c
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+++ b/src/modules/module-rescue-streams.c
@@ -0,0 +1,277 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2006 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 2.1 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 <pulse/xmalloc.h>
+
+#include <pulsecore/core.h>
+#include <pulsecore/sink-input.h>
+#include <pulsecore/source-output.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/log.h>
+#include <pulsecore/namereg.h>
+#include <pulsecore/core-util.h>
+
+#include "module-rescue-streams-symdef.h"
+
+PA_MODULE_AUTHOR("Lennart Poettering");
+PA_MODULE_DESCRIPTION("When a sink/source is removed, try to move their streams to the default sink/source");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(TRUE);
+
+static const char* const valid_modargs[] = {
+ NULL,
+};
+
+struct userdata {
+ pa_hook_slot
+ *sink_unlink_slot,
+ *source_unlink_slot,
+ *sink_input_move_fail_slot,
+ *source_output_move_fail_slot;
+};
+
+static pa_sink* find_evacuation_sink(pa_core *c, pa_sink_input *i, pa_sink *skip) {
+ pa_sink *target, *def;
+ uint32_t idx;
+
+ pa_assert(c);
+ pa_assert(i);
+
+ def = pa_namereg_get_default_sink(c);
+
+ if (def && def != skip && pa_sink_input_may_move_to(i, def))
+ return def;
+
+ PA_IDXSET_FOREACH(target, c->sinks, idx) {
+ if (target == def)
+ continue;
+
+ if (target == skip)
+ continue;
+
+ if (!PA_SINK_IS_LINKED(pa_sink_get_state(target)))
+ continue;
+
+ if (pa_sink_input_may_move_to(i, target))
+ return target;
+ }
+
+ pa_log_debug("No evacuation sink found.");
+ return NULL;
+}
+
+static pa_hook_result_t sink_unlink_hook_callback(pa_core *c, pa_sink *sink, void* userdata) {
+ pa_sink_input *i;
+ uint32_t idx;
+
+ pa_assert(c);
+ pa_assert(sink);
+
+ /* There's no point in doing anything if the core is shut down anyway */
+ if (c->state == PA_CORE_SHUTDOWN)
+ return PA_HOOK_OK;
+
+ if (pa_idxset_size(sink->inputs) <= 0) {
+ pa_log_debug("No sink inputs to move away.");
+ return PA_HOOK_OK;
+ }
+
+ PA_IDXSET_FOREACH(i, sink->inputs, idx) {
+ pa_sink *target;
+
+ if (!(target = find_evacuation_sink(c, i, sink)))
+ continue;
+
+ if (pa_sink_input_move_to(i, target, FALSE) < 0)
+ pa_log_info("Failed to move sink input %u \"%s\" to %s.", i->index,
+ pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_APPLICATION_NAME)), target->name);
+ else
+ pa_log_info("Successfully moved sink input %u \"%s\" to %s.", i->index,
+ pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_APPLICATION_NAME)), target->name);
+ }
+
+ return PA_HOOK_OK;
+}
+
+static pa_hook_result_t sink_input_move_fail_hook_callback(pa_core *c, pa_sink_input *i, void *userdata) {
+ pa_sink *target;
+
+ pa_assert(c);
+ pa_assert(i);
+
+ /* There's no point in doing anything if the core is shut down anyway */
+ if (c->state == PA_CORE_SHUTDOWN)
+ return PA_HOOK_OK;
+
+ if (!(target = find_evacuation_sink(c, i, NULL)))
+ return PA_HOOK_OK;
+
+ if (pa_sink_input_finish_move(i, target, FALSE) < 0) {
+ pa_log_info("Failed to move sink input %u \"%s\" to %s.", i->index,
+ pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_APPLICATION_NAME)), target->name);
+ return PA_HOOK_OK;
+
+ } else {
+ pa_log_info("Successfully moved sink input %u \"%s\" to %s.", i->index,
+ pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_APPLICATION_NAME)), target->name);
+ return PA_HOOK_STOP;
+ }
+}
+
+static pa_source* find_evacuation_source(pa_core *c, pa_source_output *o, pa_source *skip) {
+ pa_source *target, *def;
+ uint32_t idx;
+
+ pa_assert(c);
+ pa_assert(o);
+
+ def = pa_namereg_get_default_source(c);
+
+ if (def && def != skip && pa_source_output_may_move_to(o, def))
+ return def;
+
+ PA_IDXSET_FOREACH(target, c->sources, idx) {
+ if (target == def)
+ continue;
+
+ if (target == skip)
+ continue;
+
+ if (skip && !target->monitor_of != !skip->monitor_of)
+ continue;
+
+ if (!PA_SOURCE_IS_LINKED(pa_source_get_state(target)))
+ continue;
+
+ if (pa_source_output_may_move_to(o, target))
+ return target;
+ }
+
+ pa_log_debug("No evacuation source found.");
+ return NULL;
+}
+
+static pa_hook_result_t source_unlink_hook_callback(pa_core *c, pa_source *source, void* userdata) {
+ pa_source_output *o;
+ uint32_t idx;
+
+ pa_assert(c);
+ pa_assert(source);
+
+ /* There's no point in doing anything if the core is shut down anyway */
+ if (c->state == PA_CORE_SHUTDOWN)
+ return PA_HOOK_OK;
+
+ if (pa_idxset_size(source->outputs) <= 0) {
+ pa_log_debug("No source outputs to move away.");
+ return PA_HOOK_OK;
+ }
+
+ PA_IDXSET_FOREACH(o, source->outputs, idx) {
+ pa_source *target;
+
+ if (!(target = find_evacuation_source(c, o, source)))
+ continue;
+
+ if (pa_source_output_move_to(o, target, FALSE) < 0)
+ pa_log_info("Failed to move source output %u \"%s\" to %s.", o->index,
+ pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_APPLICATION_NAME)), target->name);
+ else
+ pa_log_info("Successfully moved source output %u \"%s\" to %s.", o->index,
+ pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_APPLICATION_NAME)), target->name);
+ }
+
+ return PA_HOOK_OK;
+}
+
+static pa_hook_result_t source_output_move_fail_hook_callback(pa_core *c, pa_source_output *i, void *userdata) {
+ pa_source *target;
+
+ pa_assert(c);
+ pa_assert(i);
+
+ /* There's no point in doing anything if the core is shut down anyway */
+ if (c->state == PA_CORE_SHUTDOWN)
+ return PA_HOOK_OK;
+
+ if (!(target = find_evacuation_source(c, i, NULL)))
+ return PA_HOOK_OK;
+
+ if (pa_source_output_finish_move(i, target, FALSE) < 0) {
+ pa_log_info("Failed to move source input %u \"%s\" to %s.", i->index,
+ pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_APPLICATION_NAME)), target->name);
+ return PA_HOOK_OK;
+
+ } else {
+ pa_log_info("Successfully moved source input %u \"%s\" to %s.", i->index,
+ pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_APPLICATION_NAME)), target->name);
+ return PA_HOOK_STOP;
+ }
+}
+
+int pa__init(pa_module*m) {
+ pa_modargs *ma;
+ struct userdata *u;
+
+ pa_assert(m);
+
+ if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+ pa_log("Failed to parse module arguments");
+ return -1;
+ }
+
+ m->userdata = u = pa_xnew(struct userdata, 1);
+
+ /* A little bit later than module-stream-restore, module-intended-roles... */
+ u->sink_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], PA_HOOK_LATE+20, (pa_hook_cb_t) sink_unlink_hook_callback, u);
+ u->source_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], PA_HOOK_LATE+20, (pa_hook_cb_t) source_unlink_hook_callback, u);
+
+ u->sink_input_move_fail_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_FAIL], PA_HOOK_LATE+20, (pa_hook_cb_t) sink_input_move_fail_hook_callback, u);
+ u->source_output_move_fail_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FAIL], PA_HOOK_LATE+20, (pa_hook_cb_t) source_output_move_fail_hook_callback, u);
+
+ pa_modargs_free(ma);
+ return 0;
+}
+
+void pa__done(pa_module*m) {
+ struct userdata *u;
+
+ pa_assert(m);
+
+ if (!(u = m->userdata))
+ return;
+
+ if (u->sink_unlink_slot)
+ pa_hook_slot_free(u->sink_unlink_slot);
+ if (u->source_unlink_slot)
+ pa_hook_slot_free(u->source_unlink_slot);
+
+ if (u->sink_input_move_fail_slot)
+ pa_hook_slot_free(u->sink_input_move_fail_slot);
+ if (u->source_output_move_fail_slot)
+ pa_hook_slot_free(u->source_output_move_fail_slot);
+
+ pa_xfree(u);
+}
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