* add new module for LIRC volume control

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@333 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 221 insertions, 0 deletions

diff --git a/polyp/module-lirc.c b/polyp/module-lirc.c
new file mode 100644
index 00000000..a68b5b99
--- /dev/null
+++ b/polyp/module-lirc.c
@@ -0,0 +1,221 @@
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio 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 of the License,
+  or (at your option) any later version.
+ 
+  polypaudio 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 polypaudio; 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 <stdio.h>
+#include <assert.h>
+#include <unistd.h>
+#include <string.h>
+#include <lirc/lirc_client.h>
+#include <stdlib.h>
+
+#include "module.h"
+#include "iochannel.h"
+#include "log.h"
+#include "module-lirc-symdef.h"
+#include "namereg.h"
+#include "sink.h"
+#include "xmalloc.h"
+#include "modargs.h"
+
+PA_MODULE_AUTHOR("Lennart Poettering")
+PA_MODULE_DESCRIPTION("LIRC volume control")
+PA_MODULE_VERSION(PACKAGE_VERSION)
+PA_MODULE_USAGE("config=<config file> sink=<sink name>")
+
+static const char* const valid_modargs[] = {
+    "config",
+    "sink",
+    NULL,
+};
+
+struct userdata {
+    int lirc_fd;
+    struct pa_io_event *io;
+    struct lirc_config *config;
+    char *sink_name;
+    struct pa_module *module;
+    float mute_toggle_save;
+};
+
+static int lirc_in_use = 0;
+
+static void io_callback(struct pa_mainloop_api *io, struct pa_io_event *e, int fd, enum pa_io_event_flags events, void*userdata) {
+    struct userdata *u = userdata;
+    char *name = NULL, *code = NULL;
+    assert(io);
+    assert(u);
+
+    if (events & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) {
+        pa_log(__FILE__": lost connection to LIRC daemon.\n");
+        goto fail;
+    }
+        
+    if (events & PA_IO_EVENT_INPUT) {
+        char *c;
+        
+        if (lirc_nextcode(&code) != 0 || !code) {
+            pa_log(__FILE__": lirc_nextcode() failed.\n");
+            goto fail;
+        }
+        
+        c = pa_xstrdup(code);
+        c[strcspn(c, "\n\r")] = 0;
+        pa_log_debug(__FILE__": raw IR code '%s'\n", c);
+        pa_xfree(c);
+        
+        while (lirc_code2char(u->config, code, &name) == 0 && name) {
+            enum { INVALID, UP, DOWN, MUTE, RESET, MUTE_TOGGLE } volchange = INVALID;
+            
+            pa_log_info(__FILE__": translated IR code '%s'\n", name);
+            
+            if (strcasecmp(name, "volume-up") == 0)
+                volchange = UP;
+            else if (strcasecmp(name, "volume-down") == 0)
+                volchange = DOWN;
+            else if (strcasecmp(name, "mute") == 0)
+                volchange = MUTE;
+            else if (strcasecmp(name, "mute-toggle") == 0)
+                volchange = MUTE_TOGGLE;
+            else if (strcasecmp(name, "reset") == 0)
+                volchange = RESET;
+            
+            if (volchange == INVALID)
+                pa_log_warn(__FILE__": recieved unknown IR code '%s'\n", name);
+            else {
+                struct pa_sink *s;
+                
+                if (!(s = pa_namereg_get(u->module->core, u->sink_name, PA_NAMEREG_SINK, 1)))
+                    pa_log(__FILE__": failed to get sink '%s'\n", u->sink_name);
+                else {
+                    double v = pa_volume_to_user(s->volume);
+                    
+                    switch (volchange) {
+                        case UP:       v += .05; break;
+                        case DOWN:     v -= .05; break;
+                        case MUTE:     v  =  0; break;
+                        case RESET:    v  =  1; break;
+                        case MUTE_TOGGLE: {
+
+                            if (v > 0) {
+                                u->mute_toggle_save = v;
+                                v = 0;
+                            } else
+                                v = u->mute_toggle_save;
+                        }
+                        default:
+                            ;
+                    }
+                    
+                    pa_sink_set_volume(s, pa_volume_from_user(v));
+                }
+            }
+        }
+    }
+
+    free(code);
+
+    return;
+    
+fail:
+    u->module->core->mainloop->io_free(u->io);
+    u->io = NULL;
+
+    pa_module_unload_request(u->module);
+
+    free(code);
+}
+    
+int pa__init(struct pa_core *c, struct pa_module*m) {
+    struct pa_modargs *ma = NULL;
+    struct userdata *u;
+    assert(c && m);
+
+    if (lirc_in_use) {
+        pa_log(__FILE__": module-lirc may no be loaded twice.\n");
+        return -1;
+    }
+    
+    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+        pa_log(__FILE__": Failed to parse module arguments\n");
+        goto fail;
+    }
+
+    m->userdata = u = pa_xmalloc(sizeof(struct userdata));
+    u->module = m;
+    u->io = NULL;
+    u->config = NULL;
+    u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
+    u->lirc_fd = -1;
+    u->mute_toggle_save = 0;
+
+    if ((u->lirc_fd = lirc_init("polypaudio", 1)) < 0) {
+        pa_log(__FILE__": lirc_init() failed.\n");
+        goto fail;
+    }
+
+    if (lirc_readconfig((char*) pa_modargs_get_value(ma, "config", NULL), &u->config, NULL) < 0) {
+        pa_log(__FILE__": lirc_readconfig() failed.\n");
+        goto fail;
+    }
+    
+    u->io = c->mainloop->io_new(c->mainloop, u->lirc_fd, PA_IO_EVENT_INPUT|PA_IO_EVENT_HANGUP, io_callback, u);
+
+    lirc_in_use = 1;
+
+    pa_modargs_free(ma);
+    
+    return 0;
+
+fail:
+
+    if (ma)
+        pa_modargs_free(ma);
+
+    pa__done(c, m);
+    return -1;
+}
+
+void pa__done(struct pa_core *c, struct pa_module*m) {
+    struct userdata *u;
+    assert(c);
+    assert(m);
+
+    if (!(u = m->userdata))
+        return;
+
+    if (u->io)
+        m->core->mainloop->io_free(u->io);
+
+    if (u->config)
+        lirc_freeconfig(u->config);
+
+    if (u->lirc_fd >= 0)
+        lirc_deinit();
+
+    pa_xfree(u->sink_name);
+    pa_xfree(u);
+
+    lirc_in_use = 0;
+}