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

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