Adding upstream version 14.2.upstream/14.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 302 insertions, 0 deletions

diff --git a/src/modules/udev-util.c b/src/modules/udev-util.c
new file mode 100644
index 0000000..026493b
--- /dev/null
+++ b/src/modules/udev-util.c
@@ -0,0 +1,302 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2009 Lennart Poettering
+
+  PulseAudio 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 2.1 of the
+  License, or (at your option) any later version.
+
+  PulseAudio 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 PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <libudev.h>
+
+#include <pulse/xmalloc.h>
+#include <pulse/proplist.h>
+
+#include <pulsecore/log.h>
+#include <pulsecore/core-util.h>
+
+#include "udev-util.h"
+
+static int read_id(struct udev_device *d, const char *n) {
+    const char *v;
+    unsigned u;
+
+    pa_assert(d);
+    pa_assert(n);
+
+    if (!(v = udev_device_get_property_value(d, n)))
+        return -1;
+
+    if (pa_startswith(v, "0x"))
+        v += 2;
+
+    if (!*v)
+        return -1;
+
+    if (sscanf(v, "%04x", &u) != 1)
+        return -1;
+
+    if (u > 0xFFFFU)
+        return -1;
+
+    return u;
+}
+
+static int dehex(char x) {
+    if (x >= '0' && x <= '9')
+        return x - '0';
+
+    if (x >= 'A' && x <= 'F')
+        return x - 'A' + 10;
+
+    if (x >= 'a' && x <= 'f')
+        return x - 'a' + 10;
+
+    return -1;
+}
+
+static void proplist_sets_unescape(pa_proplist *p, const char *prop, const char *s) {
+    const char *f;
+    char *t, *r;
+    int c = 0;
+
+    enum {
+        TEXT,
+        BACKSLASH,
+        EX,
+        FIRST
+    } state = TEXT;
+
+    /* The resulting string is definitely shorter than the source string */
+    r = pa_xnew(char, strlen(s)+1);
+
+    for (f = s, t = r; *f; f++) {
+
+        switch (state) {
+
+            case TEXT:
+                if (*f == '\\')
+                    state = BACKSLASH;
+                else
+                    *(t++) = *f;
+                break;
+
+            case BACKSLASH:
+                if (*f == 'x')
+                    state = EX;
+                else {
+                    *(t++) = '\\';
+                    *(t++) = *f;
+                    state = TEXT;
+                }
+                break;
+
+            case EX:
+                c = dehex(*f);
+
+                if (c < 0) {
+                    *(t++) = '\\';
+                    *(t++) = 'x';
+                    *(t++) = *f;
+                    state = TEXT;
+                } else
+                    state = FIRST;
+
+                break;
+
+            case FIRST: {
+                int d = dehex(*f);
+
+                if (d < 0) {
+                    *(t++) = '\\';
+                    *(t++) = 'x';
+                    *(t++) = *(f-1);
+                    *(t++) = *f;
+                } else
+                    *(t++) = (char) (c << 4) | d;
+
+                state = TEXT;
+                break;
+            }
+        }
+    }
+
+    switch (state) {
+
+        case TEXT:
+            break;
+
+        case BACKSLASH:
+            *(t++) = '\\';
+            break;
+
+        case EX:
+            *(t++) = '\\';
+            *(t++) = 'x';
+            break;
+
+        case FIRST:
+            *(t++) = '\\';
+            *(t++) = 'x';
+            *(t++) = *(f-1);
+            break;
+    }
+
+    *t = 0;
+
+    pa_proplist_sets(p, prop, r);
+    pa_xfree(r);
+}
+
+int pa_udev_get_info(int card_idx, pa_proplist *p) {
+    int r = -1;
+    struct udev *udev;
+    struct udev_device *card = NULL;
+    char *t;
+    const char *v;
+    const char *bus = NULL;
+    int id;
+
+    pa_assert(p);
+    pa_assert(card_idx >= 0);
+
+    if (!(udev = udev_new())) {
+        pa_log_error("Failed to allocate udev context.");
+        goto finish;
+    }
+
+    t = pa_sprintf_malloc("/sys/class/sound/card%i", card_idx);
+    card = udev_device_new_from_syspath(udev, t);
+    pa_xfree(t);
+
+    if (!card) {
+        pa_log_error("Failed to get card object.");
+        goto finish;
+    }
+
+    if (!pa_proplist_contains(p, PA_PROP_DEVICE_BUS_PATH))
+        if (((v = udev_device_get_property_value(card, "ID_PATH")) && *v) ||
+            (v = udev_device_get_devpath(card)))
+            pa_proplist_sets(p, PA_PROP_DEVICE_BUS_PATH, v);
+
+    if (!pa_proplist_contains(p, "sysfs.path"))
+        if ((v = udev_device_get_devpath(card)))
+            pa_proplist_sets(p, "sysfs.path", v);
+
+    if (!pa_proplist_contains(p, "udev.id"))
+        if ((v = udev_device_get_property_value(card, "ID_ID")) && *v)
+            pa_proplist_sets(p, "udev.id", v);
+
+    if (!pa_proplist_contains(p, PA_PROP_DEVICE_BUS))
+        if ((bus = udev_device_get_property_value(card, "ID_BUS")) && *bus)
+            pa_proplist_sets(p, PA_PROP_DEVICE_BUS, bus);
+
+    if (!pa_proplist_contains(p, PA_PROP_DEVICE_VENDOR_ID))
+        if ((id = read_id(card, "ID_VENDOR_ID")) > 0)
+            pa_proplist_setf(p, PA_PROP_DEVICE_VENDOR_ID, "%04x", id);
+
+    if (!pa_proplist_contains(p, PA_PROP_DEVICE_VENDOR_NAME)) {
+        /* ID_VENDOR_FROM_DATABASE returns the name of IEEE 1394 Phy/Link chipset for FireWire devices */
+        if (!pa_safe_streq(bus, "firewire") && (v = udev_device_get_property_value(card, "ID_VENDOR_FROM_DATABASE")) && *v)
+            pa_proplist_sets(p, PA_PROP_DEVICE_VENDOR_NAME, v);
+        else if ((v = udev_device_get_property_value(card, "ID_VENDOR_ENC")) && *v)
+            proplist_sets_unescape(p, PA_PROP_DEVICE_VENDOR_NAME, v);
+        else if ((v = udev_device_get_property_value(card, "ID_VENDOR")) && *v)
+            pa_proplist_sets(p, PA_PROP_DEVICE_VENDOR_NAME, v);
+    }
+
+    if (!pa_proplist_contains(p, PA_PROP_DEVICE_PRODUCT_ID))
+        if ((id = read_id(card, "ID_MODEL_ID")) >= 0)
+            pa_proplist_setf(p, PA_PROP_DEVICE_PRODUCT_ID, "%04x", id);
+
+    if (!pa_proplist_contains(p, PA_PROP_DEVICE_PRODUCT_NAME)) {
+        /* ID_MODEL_FROM_DATABASE returns the name of IEEE 1394 Phy/Link chipset for FireWire devices */
+        if (!pa_safe_streq(bus, "firewire") && (v = udev_device_get_property_value(card, "ID_MODEL_FROM_DATABASE")) && *v)
+            pa_proplist_sets(p, PA_PROP_DEVICE_PRODUCT_NAME, v);
+        else if ((v = udev_device_get_property_value(card, "ID_MODEL_ENC")) && *v)
+            proplist_sets_unescape(p, PA_PROP_DEVICE_PRODUCT_NAME, v);
+        else if ((v = udev_device_get_property_value(card, "ID_MODEL")) && *v)
+            pa_proplist_sets(p, PA_PROP_DEVICE_PRODUCT_NAME, v);
+    }
+
+    if (!pa_proplist_contains(p, PA_PROP_DEVICE_SERIAL))
+        if ((v = udev_device_get_property_value(card, "ID_SERIAL")) && *v)
+            pa_proplist_sets(p, PA_PROP_DEVICE_SERIAL, v);
+
+    if (!pa_proplist_contains(p, PA_PROP_DEVICE_CLASS))
+        if ((v = udev_device_get_property_value(card, "SOUND_CLASS")) && *v)
+            pa_proplist_sets(p, PA_PROP_DEVICE_CLASS, v);
+
+    if (!pa_proplist_contains(p, PA_PROP_DEVICE_FORM_FACTOR))
+        if ((v = udev_device_get_property_value(card, "SOUND_FORM_FACTOR")) && *v)
+            pa_proplist_sets(p, PA_PROP_DEVICE_FORM_FACTOR, v);
+
+    /* This is normally not set by the udev rules but may be useful to
+     * allow administrators to overwrite the device description.*/
+    if (!pa_proplist_contains(p, PA_PROP_DEVICE_DESCRIPTION))
+        if ((v = udev_device_get_property_value(card, "SOUND_DESCRIPTION")) && *v)
+            pa_proplist_sets(p, PA_PROP_DEVICE_DESCRIPTION, v);
+
+    r = 0;
+
+finish:
+
+    if (card)
+        udev_device_unref(card);
+
+    if (udev)
+        udev_unref(udev);
+
+    return r;
+}
+
+char* pa_udev_get_property(int card_idx, const char *name) {
+    struct udev *udev;
+    struct udev_device *card = NULL;
+    char *t, *r = NULL;
+    const char *v;
+
+    pa_assert(card_idx >= 0);
+    pa_assert(name);
+
+    if (!(udev = udev_new())) {
+        pa_log_error("Failed to allocate udev context.");
+        goto finish;
+    }
+
+    t = pa_sprintf_malloc("/sys/class/sound/card%i", card_idx);
+    card = udev_device_new_from_syspath(udev, t);
+    pa_xfree(t);
+
+    if (!card) {
+        pa_log_error("Failed to get card object.");
+        goto finish;
+    }
+
+    if ((v = udev_device_get_property_value(card, name)) && *v)
+        r = pa_xstrdup(v);
+
+finish:
+
+    if (card)
+        udev_device_unref(card);
+
+    if (udev)
+        udev_unref(udev);
+
+    return r;
+}