code.delx.au - pulseaudio/blob - src/modules/module-rescue-streams.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2006 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <pulse/xmalloc.h>
  27
  28 #include <pulsecore/core.h>
  29 #include <pulsecore/sink-input.h>
  30 #include <pulsecore/source-output.h>
  31 #include <pulsecore/modargs.h>
  32 #include <pulsecore/log.h>
  33 #include <pulsecore/namereg.h>
  34
  35 #include "module-rescue-streams-symdef.h"
  36
  37 PA_MODULE_AUTHOR("Lennart Poettering");
  38 PA_MODULE_DESCRIPTION("When a sink/source is removed, try to move their streams to the default sink/source");
  39 PA_MODULE_VERSION(PACKAGE_VERSION);
  40 PA_MODULE_LOAD_ONCE(TRUE);
  41
  42 static const char* const valid_modargs[] = {
  43     NULL,
  44 };
  45
  46 struct userdata {
  47     pa_hook_slot *sink_slot, *source_slot;
  48 };
  49
  50 static pa_hook_result_t sink_hook_callback(pa_core *c, pa_sink *sink, void* userdata) {
  51     pa_sink_input *i;
  52     pa_sink *target;
  53
  54     pa_assert(c);
  55     pa_assert(sink);
  56
  57     /* There's no point in doing anything if the core is shut down anyway */
  58     if (c->state == PA_CORE_SHUTDOWN)
  59         return PA_HOOK_OK;
  60
  61     if (!pa_idxset_size(sink->inputs)) {
  62         pa_log_debug("No sink inputs to move away.");
  63         return PA_HOOK_OK;
  64     }
  65
  66     if (!(target = pa_namereg_get(c, NULL, PA_NAMEREG_SINK)) || target == sink) {
  67         uint32_t idx;
  68
  69         for (target = pa_idxset_first(c->sinks, &idx); target; target = pa_idxset_next(c->sinks, &idx))
  70             if (target != sink)
  71                 break;
  72
  73         if (!target) {
  74             pa_log_info("No evacuation sink found.");
  75             return PA_HOOK_OK;
  76         }
  77     }
  78
  79     while ((i = pa_idxset_first(sink->inputs, NULL))) {
  80         if (pa_sink_input_move_to(i, target, FALSE) < 0) {
  81             pa_log_warn("Failed to move sink input %u \"%s\" to %s.", i->index, pa_proplist_gets(i->proplist, PA_PROP_APPLICATION_NAME), target->name);
  82             return PA_HOOK_OK;
  83         }
  84
  85         pa_log_info("Sucessfully moved sink input %u \"%s\" to %s.", i->index, pa_proplist_gets(i->proplist, PA_PROP_APPLICATION_NAME), target->name);
  86     }
  87
  88
  89     return PA_HOOK_OK;
  90 }
  91
  92 static pa_hook_result_t source_hook_callback(pa_core *c, pa_source *source, void* userdata) {
  93     pa_source_output *o;
  94     pa_source *target;
  95
  96     pa_assert(c);
  97     pa_assert(source);
  98
  99     /* There's no point in doing anything if the core is shut down anyway */
 100     if (c->state == PA_CORE_SHUTDOWN)
 101         return PA_HOOK_OK;
 102
 103     if (!pa_idxset_size(source->outputs)) {
 104         pa_log_debug("No source outputs to move away.");
 105         return PA_HOOK_OK;
 106     }
 107
 108     if (!(target = pa_namereg_get(c, NULL, PA_NAMEREG_SOURCE)) || target == source) {
 109         uint32_t idx;
 110
 111         for (target = pa_idxset_first(c->sources, &idx); target; target = pa_idxset_next(c->sources, &idx))
 112             if (target != source && !target->monitor_of == !source->monitor_of)
 113                 break;
 114
 115         if (!target) {
 116             pa_log_info("No evacuation source found.");
 117             return PA_HOOK_OK;
 118         }
 119     }
 120
 121     pa_assert(target != source);
 122
 123     while ((o = pa_idxset_first(source->outputs, NULL))) {
 124         if (pa_source_output_move_to(o, target, FALSE) < 0) {
 125             pa_log_warn("Failed to move source output %u \"%s\" to %s.", o->index, pa_proplist_gets(o->proplist, PA_PROP_APPLICATION_NAME), target->name);
 126             return PA_HOOK_OK;
 127         }
 128
 129         pa_log_info("Sucessfully moved source output %u \"%s\" to %s.", o->index, pa_proplist_gets(o->proplist, PA_PROP_APPLICATION_NAME), target->name);
 130     }
 131
 132
 133     return PA_HOOK_OK;
 134 }
 135
 136 int pa__init(pa_module*m) {
 137     pa_modargs *ma = NULL;
 138     struct userdata *u;
 139
 140     pa_assert(m);
 141
 142     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 143         pa_log("Failed to parse module arguments");
 144         return -1;
 145     }
 146
 147     m->userdata = u = pa_xnew(struct userdata, 1);
 148     u->sink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) sink_hook_callback, NULL);
 149     u->source_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) source_hook_callback, NULL);
 150
 151     pa_modargs_free(ma);
 152     return 0;
 153 }
 154
 155 void pa__done(pa_module*m) {
 156     struct userdata *u;
 157
 158     pa_assert(m);
 159
 160     if (!m->userdata)
 161         return;
 162
 163     u = m->userdata;
 164     if (u->sink_slot)
 165         pa_hook_slot_free(u->sink_slot);
 166     if (u->source_slot)
 167         pa_hook_slot_free(u->source_slot);
 168
 169     pa_xfree(u);
 170 }