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 2.1 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 #include <pulsecore/core-util.h>
  35
  36 #include "module-rescue-streams-symdef.h"
  37
  38 PA_MODULE_AUTHOR("Lennart Poettering");
  39 PA_MODULE_DESCRIPTION("When a sink/source is removed, try to move their streams to the default sink/source");
  40 PA_MODULE_VERSION(PACKAGE_VERSION);
  41 PA_MODULE_LOAD_ONCE(TRUE);
  42
  43 static const char* const valid_modargs[] = {
  44     NULL,
  45 };
  46
  47 struct userdata {
  48     pa_hook_slot *sink_slot, *source_slot;
  49 };
  50
  51 static pa_hook_result_t sink_hook_callback(pa_core *c, pa_sink *sink, void* userdata) {
  52     pa_sink_input *i;
  53     uint32_t idx;
  54     pa_sink *target;
  55
  56     pa_assert(c);
  57     pa_assert(sink);
  58
  59     /* There's no point in doing anything if the core is shut down anyway */
  60     if (c->state == PA_CORE_SHUTDOWN)
  61         return PA_HOOK_OK;
  62
  63     if (pa_idxset_size(sink->inputs) <= 0) {
  64         pa_log_debug("No sink inputs to move away.");
  65         return PA_HOOK_OK;
  66     }
  67
  68     if (!(target = pa_namereg_get_default_sink(c)) || target == sink) {
  69
  70         PA_IDXSET_FOREACH(target, c->sinks, idx)
  71             if (target != sink)
  72                 break;
  73
  74         if (!target) {
  75             pa_log_debug("No evacuation sink found.");
  76             return PA_HOOK_OK;
  77         }
  78     }
  79
  80     pa_assert(target != sink);
  81
  82     PA_IDXSET_FOREACH(i, sink->inputs, idx) {
  83         if (pa_sink_input_move_to(i, target, FALSE) < 0)
  84             pa_log_info("Failed to move sink input %u \"%s\" to %s.", i->index,
  85                         pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_APPLICATION_NAME)), target->name);
  86         else
  87             pa_log_info("Sucessfully moved sink input %u \"%s\" to %s.", i->index,
  88                         pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_APPLICATION_NAME)), target->name);
  89     }
  90
  91     return PA_HOOK_OK;
  92 }
  93
  94 static pa_hook_result_t source_hook_callback(pa_core *c, pa_source *source, void* userdata) {
  95     pa_source_output *o;
  96     pa_source *target;
  97     uint32_t idx;
  98
  99     pa_assert(c);
 100     pa_assert(source);
 101
 102     /* There's no point in doing anything if the core is shut down anyway */
 103     if (c->state == PA_CORE_SHUTDOWN)
 104         return PA_HOOK_OK;
 105
 106     if (pa_idxset_size(source->outputs) <= 0) {
 107         pa_log_debug("No source outputs to move away.");
 108         return PA_HOOK_OK;
 109     }
 110
 111     if (!(target = pa_namereg_get_default_source(c)) || target == source) {
 112
 113         PA_IDXSET_FOREACH(target, c->sources, idx)
 114             if (target != source && !target->monitor_of == !source->monitor_of)
 115                 break;
 116
 117         if (!target) {
 118             pa_log_info("No evacuation source found.");
 119             return PA_HOOK_OK;
 120         }
 121     }
 122
 123     pa_assert(target != source);
 124
 125     PA_IDXSET_FOREACH(o, source->outputs, idx) {
 126         if (pa_source_output_move_to(o, target, FALSE) < 0)
 127             pa_log_info("Failed to move source output %u \"%s\" to %s.", o->index,
 128                         pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_APPLICATION_NAME)), target->name);
 129         else
 130             pa_log_info("Sucessfully moved source output %u \"%s\" to %s.", o->index,
 131                         pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_APPLICATION_NAME)), target->name);
 132     }
 133
 134     return PA_HOOK_OK;
 135 }
 136
 137 int pa__init(pa_module*m) {
 138     pa_modargs *ma;
 139     struct userdata *u;
 140
 141     pa_assert(m);
 142
 143     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 144         pa_log("Failed to parse module arguments");
 145         return -1;
 146     }
 147
 148     m->userdata = u = pa_xnew(struct userdata, 1);
 149
 150     /* A little bit later than module-stream-restore, module-intended-roles... */
 151     u->sink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], PA_HOOK_LATE+20, (pa_hook_cb_t) sink_hook_callback, u);
 152     u->source_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], PA_HOOK_LATE+20, (pa_hook_cb_t) source_hook_callback, u);
 153
 154     pa_modargs_free(ma);
 155     return 0;
 156 }
 157
 158 void pa__done(pa_module*m) {
 159     struct userdata *u;
 160
 161     pa_assert(m);
 162
 163     if (!(u = m->userdata))
 164         return;
 165
 166     if (u->sink_slot)
 167         pa_hook_slot_free(u->sink_slot);
 168     if (u->source_slot)
 169         pa_hook_slot_free(u->source_slot);
 170
 171     pa_xfree(u);
 172 }