implemented pax11publish.c

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@275 fefdeb5f-60dc-0310-8127-8f9354f1896f

doc/FAQ.html.in

@@ -126,7 +126,23 @@ connect to a running polypaudio daemon try using the following commands:</p>
 <pre>killall -USR2 polypaudio
 bidilink unix-client:/tmp/polypaudio/cli</pre>
 
-<p><i>BTW: Someone should package that great tool for Debian!</i></p>
+<p><i>BTW: Someone should package that great tool for Debian!</i></p></li>
+
+
+
+<li><p><b>How do the polypaudio libraries decide where to connect to?</b></p>
+<p>The following rule applies:</p>
+<ol>
+  <li>If the the application using the library specifies a server to connect to it is used. If the connection fails, the library fails too.</li>
+  <li>If the environment variable <tt>POLYP_SERVER</tt> is defined the library connects to that server. If the connection fails, the library fails too.</li>
+  <li>If <tt>$DISPLAY</tt> is set, the library tries to connect to that server and looks for the root window property <tt>POYLP_SERVER</tt> for the host to connect to. If <tt>POLYP_COOKIE</tt> is set it is used as authentication cookie.</li>
+  <li>If the client configuration file (<tt>~/.polypaudio/client.conf</tt> or <tt>/etc/polypaudio/client.conf</tt>) sets the server address, the library connects to that server. If the connection fails, the library fails too.</li>
+  <li>The library tries to connect to the default local UNIX socket for polypaudio servers. If the connection fails, it proceeds with the next item.</li>
+  <li>The library tries to connect to the default local TCP socket for polypaudio servers. If the connection fails, it proceeds with the next item.</li>
+  <li>If <tt>$DISPLAY</tt> is set, the library tries to connect to the default TCP port of that host. If the connection fails, it proceeds with the next item.</li>
+  <li>The connection fails.</li>
+</ol>
+<p></p>
 
 </li>
 

polyp/Makefile.am

@@ -31,7 +31,7 @@ AM_LDADD=$(PTHREAD_LIBS) -lm
 AM_LIBADD=$(PTHREAD_LIBS) -lm
 
 EXTRA_DIST = default.pa.in daemon.conf.in client.conf.in depmod.py esdcompat.sh.in module-defs.h.m4
-bin_PROGRAMS = polypaudio pacat pactl paplay
+bin_PROGRAMS = polypaudio pacat pactl paplay pax11publish
 bin_SCRIPTS = esdcompat.sh
 noinst_PROGRAMS = \
 		mainloop-test \
@@ -441,6 +441,10 @@ parec_simple_SOURCES = parec-simple.c
 parec_simple_LDADD = $(AM_LDADD) libpolyp-@PA_MAJORMINOR@.la libpolyp-simple-@PA_MAJORMINOR@.la libpolyp-error-@PA_MAJORMINOR@.la libpolyp-mainloop-@PA_MAJORMINOR@.la
 parec_simple_CFLAGS = $(AM_CFLAGS)
 
+pax11publish_SOURCES = pax11publish.c util.c xmalloc.c log.c authkey.c client-conf.c conf-parser.c
+pax11publish_CFLAGS = $(AM_CFLAGS) $(X_CFLAGS)
+pax11publish_LDADD = $(AM_LDADD) $(X_PRE_LIBS) -lX11 $(X_LIBS) $(X_EXTRA_LIB)
+
 mainloop_test_SOURCES = mainloop-test.c
 mainloop_test_CFLAGS = $(AM_CFLAGS)
 mainloop_test_LDADD = $(AM_LDADD) libpolyp-mainloop-@PA_MAJORMINOR@.la libpolyp-@PA_MAJORMINOR@.la

polyp/authkey.c

@@ -68,7 +68,7 @@ static int generate(int fd, void *data, size_t length) {
     lseek(fd, 0, SEEK_SET);
 
     if ((r = pa_loop_write(fd, data, length)) < 0 || (size_t) r != length) {
-        pa_log(__FILE__": failed to write cookie file\n");
+        pa_log(__FILE__": failed to write cookie file: %s\n", strerror(errno));
         goto finish;
     }
 
@@ -91,7 +91,7 @@ static int load(const char *fn, void *data, size_t length) {
 
     if ((fd = open(fn, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR)) < 0) {
         if (errno != EACCES || (fd = open(fn, O_RDONLY)) < 0) {
-            pa_log(__FILE__": failed to open cookie file '%s'\n", fn);
+            pa_log(__FILE__": failed to open cookie file '%s': %s\n", fn, strerror(errno));
             goto finish;
         } else
             writable = 0;
@@ -100,7 +100,7 @@ static int load(const char *fn, void *data, size_t length) {
     unlock = pa_lock_fd(fd, 1) >= 0;
 
     if ((r = pa_loop_read(fd, data, length)) < 0) {
-        pa_log(__FILE__": failed to read cookie file '%s'\n", fn);
+        pa_log(__FILE__": failed to read cookie file '%s': %s\n", fn, strerror(errno));
         goto finish;
     }
 
@@ -144,21 +144,28 @@ int pa_authkey_load(const char *path, void *data, size_t length) {
     return ret;
 }
 
-int pa_authkey_load_from_home(const char *fn, void *data, size_t length) {
-    char path[PATH_MAX];
-    const char *p;
-
-    assert(fn && data && length);
+static const char *normalize_path(const char *fn, char *s, size_t l) {
+    assert(fn && s && l > 0);
 
     if (fn[0] != '/') {
         char homedir[PATH_MAX];
         if (!pa_get_home_dir(homedir, sizeof(homedir)))
-            return -2;
+            return NULL;
         
-        snprintf(path, sizeof(path), "%s/%s", homedir, fn);
-        p = path;
-    } else
-        p = fn;
+        snprintf(s, l, "%s/%s", homedir, fn);
+        return s;
+    }
+
+    return fn;
+}
+
+int pa_authkey_load_from_home(const char *fn, void *data, size_t length) {
+    char path[PATH_MAX];
+    const char *p;
+    assert(fn && data && length);
+
+    if (!(p = normalize_path(fn, path, sizeof(path))))
+        return -2;
         
     return pa_authkey_load(p, data, length);
 }
@@ -171,3 +178,41 @@ int pa_authkey_load_auto(const char *fn, void *data, size_t length) {
     else
         return pa_authkey_load_from_home(fn, data, length);
 }
+
+int pa_authkey_save(const char *fn, const void *data, size_t length) {
+    int fd = -1;
+    int unlock = 0, ret = -1;
+    ssize_t r;
+    char path[PATH_MAX];
+    const char *p;
+    assert(fn && data && length);
+
+    if (!(p = normalize_path(fn, path, sizeof(path))))
+        return -2;
+
+    if ((fd = open(p, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR)) < 0) {
+        pa_log(__FILE__": failed to open cookie file '%s': %s\n", fn, strerror(errno));
+        goto finish;
+    }
+
+    unlock = pa_lock_fd(fd, 1) >= 0;
+
+    if ((r = pa_loop_write(fd, data, length)) < 0 || (size_t) r != length) {
+        pa_log(__FILE__": failed to read cookie file '%s': %s\n", fn, strerror(errno));
+        goto finish;
+    }
+
+    ret = 0;
+    
+finish:
+
+    if (fd >= 0) {
+        
+        if (unlock)
+            pa_lock_fd(fd, 0);
+        
+        close(fd);
+    }
+
+    return ret;
+}

polyp/authkey.h

@@ -28,4 +28,6 @@ int pa_authkey_load(const char *path, void *data, size_t len);
 int pa_authkey_load_from_home(const char *fn, void *data, size_t length);
 int pa_authkey_load_auto(const char *fn, void *data, size_t length);
 
+int pa_authkey_save(const char *path, const void *data, size_t length);
+
 #endif

polyp/client-conf.c

@@ -102,7 +102,7 @@ int pa_client_conf_load(struct pa_client_conf *c, const char *filename) {
         goto finish;
     }
     
-    r = pa_config_parse(fn, f, table, NULL);
+    r = f ? pa_config_parse(fn, f, table, NULL) : 0;
 
 finish:
     pa_xfree(fn);

polyp/daemon-conf.c

@@ -182,12 +182,12 @@ int pa_daemon_conf_load(struct pa_daemon_conf *c, const char *filename) {
         fopen(c->config_file = pa_xstrdup(filename), "r") :
         pa_open_config_file(DEFAULT_CONFIG_FILE, DEFAULT_CONFIG_FILE_USER, ENV_CONFIG_FILE, &c->config_file);
 
-    if (!f && errno != EINTR) {
+    if (!f && errno != ENOENT) {
         pa_log(__FILE__": WARNING: failed to open configuration file '%s': %s\n", filename, strerror(errno));
         goto finish;
     }
 
-    r = pa_config_parse(c->config_file, f, table, NULL);
+    r = f ? pa_config_parse(c->config_file, f, table, NULL) : 0;
     
 finish:
     if (f)

polyp/pax11publish.c

@@ -0,0 +1,246 @@
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU 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 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 <getopt.h>
+#include <string.h>
+#include <assert.h>
+
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+
+#include "util.h"
+#include "log.h"
+#include "authkey.h"
+#include "native-common.h"
+#include "client-conf.h"
+
+static void set_x11_prop(Display *d, const char *name, const char *data) {
+    Atom a = XInternAtom(d, name, False);
+    XChangeProperty(d, RootWindow(d, 0), a, XA_STRING, 8, PropModeReplace, (unsigned char*) data, strlen(data)+1);
+}
+
+static void del_x11_prop(Display *d, const char *name) {
+    Atom a = XInternAtom(d, name, False);
+    XDeleteProperty(d, RootWindow(d, 0), a);
+}
+
+static char* get_x11_prop(Display *d, const char *name, char *p, size_t l) {
+    Atom actual_type;
+    int actual_format;
+    unsigned long nitems;
+    unsigned long nbytes_after;
+    unsigned char *prop = NULL;
+    char *ret = NULL;
+    
+    Atom a = XInternAtom(d, name, False);
+    if (XGetWindowProperty(d, RootWindow(d, 0), a, 0, (l+2)/4, False, XA_STRING, &actual_type, &actual_format, &nitems, &nbytes_after, &prop) != Success)
+        goto finish;
+
+    if (actual_type != XA_STRING)
+        goto finish;
+
+    memcpy(p, prop, nitems);
+    p[nitems] = 0;
+
+    ret = p;
+
+finish:
+
+    if (prop)
+        XFree(prop);
+    
+    return ret;
+}
+
+int main(int argc, char *argv[]) {
+    const char *dname = NULL, *sink = NULL, *source = NULL, *server = NULL, *cookie_file = PA_NATIVE_COOKIE_FILE;
+    int c, ret = 1;
+    Display *d = NULL;
+    enum { DUMP, EXPORT, IMPORT, REMOVE } mode = DUMP;
+
+    while ((c = getopt(argc, argv, "deiD:S:O:I:c:hr")) != -1) {
+        switch (c) {
+            case 'D' :
+                dname = optarg;
+                break;
+            case 'h':
+                printf("%s [-D display] [-S server] [-O sink] [-I source] [-c file]  [-d|-e|-i|-r]\n", pa_path_get_filename(argv[0]));
+                ret = 0;
+                goto finish;
+            case 'd':
+                mode = DUMP;
+                break;
+            case 'e':
+                mode = EXPORT;
+                break;
+            case 'i':
+                mode = IMPORT;
+                break;
+            case 'r':
+                mode = REMOVE;
+                break;
+            case 'c':
+                cookie_file = optarg;
+                break;
+            case 'I':
+                source = optarg;
+                break;
+            case 'O':
+                sink = optarg;
+                break;
+            case 'S':
+                server = optarg;
+                break;
+            default:
+                fprintf(stderr, "Failed to parse command line.\n");
+                goto finish;
+        }
+    }
+
+    if (!(d = XOpenDisplay(dname))) {
+        pa_log(__FILE__": XOpenDisplay() failed\n");
+        goto finish;
+    }
+
+    switch (mode) {
+        case DUMP: {
+            char t[1024];
+            if (!get_x11_prop(d, "POLYP_SERVER", t, sizeof(t))) 
+                goto finish;
+
+            printf("Server: %s\n", t);
+            if (get_x11_prop(d, "POLYP_SOURCE", t, sizeof(t)))
+                printf("Source: %s\n", t);
+            if (get_x11_prop(d, "POLYP_SINK", t, sizeof(t)))
+                printf("Sink: %s\n", t);
+            if (get_x11_prop(d, "POLYP_COOKIE", t, sizeof(t)))
+                printf("Cookie: %s\n", t);
+
+            break;
+        }
+            
+        case IMPORT: {
+            char t[1024];
+            if (!get_x11_prop(d, "POLYP_SERVER", t, sizeof(t))) 
+                goto finish;
+
+            printf("POLYP_SERVER='%s'\nexport POLYP_SERVER\n", t);
+            
+            if (get_x11_prop(d, "POLYP_SOURCE", t, sizeof(t)))
+                printf("POLYP_SOURCE='%s'\nexport POLYP_SOURCE\n", t);
+            if (get_x11_prop(d, "POLYP_SINK", t, sizeof(t)))
+                printf("POLYP_SINK='%s'\nexport POLYP_SINK\n", t);
+
+            if (get_x11_prop(d, "POLYP_COOKIE", t, sizeof(t))) {
+                uint8_t cookie[PA_NATIVE_COOKIE_LENGTH];
+                size_t l;
+                if ((l = pa_parsehex(t, cookie, sizeof(cookie))) == (size_t) -1) {
+                    fprintf(stderr, "Failed to parse cookie data\n");
+                    goto finish;
+                }
+
+                if (pa_authkey_save(cookie_file, cookie, l) < 0) {
+                    fprintf(stderr, "Failed to save cookie data\n");
+                    goto finish;
+                }
+            }
+
+            break;
+        }
+
+        case EXPORT: {
+            struct pa_client_conf *c = pa_client_conf_new();
+            uint8_t cookie[PA_NATIVE_COOKIE_LENGTH];
+            char hx[PA_NATIVE_COOKIE_LENGTH*2+1];
+            assert(c);
+
+            if (pa_client_conf_load(c, NULL) < 0) {
+                fprintf(stderr, "Failed to load client configuration file.\n");
+                goto finish;
+            }
+
+            if (pa_client_conf_env(c) < 0) {
+                fprintf(stderr, "Failed to read environment configuration data.\n");
+                goto finish;
+            }
+
+            del_x11_prop(d, "POLYP_ID");
+
+            if (server)
+                set_x11_prop(d, "POLYP_SERVER", c->default_server);
+            else if (c->default_server)
+                set_x11_prop(d, "POLYP_SERVER", c->default_server);
+            else {
+                char hn[256];
+                pa_get_host_name(hn, sizeof(hn));
+                set_x11_prop(d, "POLYP_SERVER", hn);
+            }
+
+            if (sink)
+                set_x11_prop(d, "POLYP_SINK", sink);
+            else if (c->default_sink)
+                set_x11_prop(d, "POLYP_SINK", c->default_sink);
+
+            if (source)
+                set_x11_prop(d, "POLYP_SOURCE", source);
+            if (c->default_source)
+                set_x11_prop(d, "POLYP_SOURCE", c->default_source);
+
+            pa_client_conf_free(c);
+            
+            if (pa_authkey_load_auto(cookie_file, cookie, sizeof(cookie)) < 0) {
+                fprintf(stderr, "Failed to load cookie data\n");
+                goto finish;
+            }
+
+            set_x11_prop(d, "POLYP_COOKIE", pa_hexstr(cookie, sizeof(cookie), hx, sizeof(hx)));
+            break;
+        }
+
+        case REMOVE:
+            del_x11_prop(d, "POLYP_SERVER");
+            del_x11_prop(d, "POLYP_SINK");
+            del_x11_prop(d, "POLYP_SOURCE");
+            del_x11_prop(d, "POLYP_ID");
+            del_x11_prop(d, "POLYP_COOKIE");
+            break;
+            
+        default:
+            fprintf(stderr, "No yet implemented.\n");
+            goto finish;
+    }
+
+    ret = 0;
+    
+finish:
+
+    if (d) {
+        XSync(d, False);
+        XCloseDisplay(d);
+    }
+    
+    return ret;
+}

polyp/polyplib-simple.c

@@ -325,8 +325,12 @@ static void latency_complete(struct pa_stream *s, const struct pa_latency_info *
 
     if (!l)
         p->dead = 1;
-    else
-        p->latency = l->buffer_usec + l->sink_usec + l->transport_usec;
+    else {
+        int negative = 0;
+        p->latency = pa_stream_get_latency(s, l, &negative);
+        if (negative)
+            p->latency = 0;
+    }
 }
 
 pa_usec_t pa_simple_get_playback_latency(struct pa_simple *p, int *perror) {

polyp/util.c

@@ -732,3 +732,44 @@ char *pa_hexstr(const uint8_t* d, size_t dlength, char *s, size_t slength) {
     s[j < slength ? j : slength] = 0;
     return s;
 }
+
+/* Convert a hexadecimal digit to a number or -1 if invalid */
+static int hexc(char c) {
+    if (c >= '0' && c <= '9')
+        return c - '0';
+
+    if (c >= 'A' && c <= 'F')
+        return c - 'A' + 10;
+
+    if (c >= 'a' && c <= 'f')
+        return c - 'a' + 10;
+
+    return -1;
+}
+
+/* Parse a hexadecimal string as created by pa_hexstr() to a BLOB */
+size_t pa_parsehex(const char *p, uint8_t *d, size_t dlength) {
+    size_t j = 0;
+    assert(p && d);
+
+    while (j < dlength && *p) {
+        int b;
+
+        if ((b = hexc(*(p++))) < 0)
+            return (size_t) -1;
+        
+        d[j] = (uint8_t) (b << 4);
+
+        if (!*p)
+            return (size_t) -1;
+
+        if ((b = hexc(*(p++))) < 0)
+            return (size_t) -1;
+
+        d[j] |= (uint8_t) b;
+
+        j++;
+    }
+
+    return j;
+}

polyp/util.h

@@ -82,5 +82,6 @@ int pa_unlock_lockfile(int fd);
 FILE *pa_open_config_file(const char *env, const char *global, const char *local, char **result);
 
 char *pa_hexstr(const uint8_t* d, size_t dlength, char *s, size_t slength);
+size_t pa_parsehex(const char *p, uint8_t *d, size_t dlength);
 
 #endif