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
  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     pa_sink *target;
  54
  55     pa_assert(c);
  56     pa_assert(sink);
  57
  58     if (!pa_idxset_size(sink->inputs)) {
  59         pa_log_debug("No sink inputs to move away.");
  60         return PA_HOOK_OK;
  61     }
  62
  63     if (!(target = pa_namereg_get(c, NULL, PA_NAMEREG_SINK, 0)) || target == sink) {
  64         uint32_t idx;
  65
  66         for (target = pa_idxset_first(c->sinks, &idx); target; target = pa_idxset_next(c->sinks, &idx))
  67             if (target != sink)
  68                 break;
  69
  70         if (!target) {
  71             pa_log_info("No evacuation sink found.");
  72             return PA_HOOK_OK;
  73         }
  74     }
  75
  76     while ((i = pa_idxset_first(sink->inputs, NULL))) {
  77         if (pa_sink_input_move_to(i, target, 1) < 0) {
  78             pa_log_warn("Failed to move sink input %u \"%s\" to %s.", i->index, i->name, target->name);
  79             return PA_HOOK_OK;
  80         }
  81
  82         pa_log_info("Sucessfully moved sink input %u \"%s\" to %s.", i->index, i->name, target->name);
  83     }
  84
  85
  86     return PA_HOOK_OK;
  87 }
  88
  89 static pa_hook_result_t source_hook_callback(pa_core *c, pa_source *source, void* userdata) {
  90     pa_source_output *o;
  91     pa_source *target;
  92
  93     pa_assert(c);
  94     pa_assert(source);
  95
  96     if (!pa_idxset_size(source->outputs)) {
  97         pa_log_debug("No source outputs to move away.");
  98         return PA_HOOK_OK;
  99     }
 100
 101     if (!(target = pa_namereg_get(c, NULL, PA_NAMEREG_SOURCE, 0)) || target == source) {
 102         uint32_t idx;
 103
 104         for (target = pa_idxset_first(c->sources, &idx); target; target = pa_idxset_next(c->sources, &idx))
 105             if (target != source && !target->monitor_of == !source->monitor_of)
 106                 break;
 107
 108         if (!target) {
 109             pa_log_info("No evacuation source found.");
 110             return PA_HOOK_OK;
 111         }
 112     }
 113
 114     pa_assert(target != source);
 115
 116     while ((o = pa_idxset_first(source->outputs, NULL))) {
 117         if (pa_source_output_move_to(o, target) < 0) {
 118             pa_log_warn("Failed to move source output %u \"%s\" to %s.", o->index, o->name, target->name);
 119             return PA_HOOK_OK;
 120         }
 121
 122         pa_log_info("Sucessfully moved source output %u \"%s\" to %s.", o->index, o->name, target->name);
 123     }
 124
 125
 126     return PA_HOOK_OK;
 127 }
 128
 129 int pa__init(pa_module*m) {
 130     pa_modargs *ma = NULL;
 131     struct userdata *u;
 132
 133     pa_assert(m);
 134
 135     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 136         pa_log("Failed to parse module arguments");
 137         return -1;
 138     }
 139
 140     m->userdata = u = pa_xnew(struct userdata, 1);
 141     u->sink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], (pa_hook_cb_t) sink_hook_callback, NULL);
 142     u->source_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], (pa_hook_cb_t) source_hook_callback, NULL);
 143
 144     pa_modargs_free(ma);
 145     return 0;
 146 }
 147
 148 void pa__done(pa_module*m) {
 149     struct userdata *u;
 150
 151     pa_assert(m);
 152
 153     if (!m->userdata)
 154         return;
 155
 156     u = m->userdata;
 157     if (u->sink_slot)
 158         pa_hook_slot_free(u->sink_slot);
 159     if (u->source_slot)
 160         pa_hook_slot_free(u->source_slot);
 161
 162     pa_xfree(u);
 163 }