really create glitch-free branch

git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/glitch-free@2120 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 262 insertions, 0 deletions

diff --git a/src/modules/module-mmkbd-evdev.c b/src/modules/module-mmkbd-evdev.c
new file mode 100644
index 00000000..03c0e973
--- /dev/null
+++ b/src/modules/module-mmkbd-evdev.c
@@ -0,0 +1,262 @@
+/* $Id$ */
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2005-2006 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 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, 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 <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include <linux/input.h>
+
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/core-error.h>
+#include <pulsecore/module.h>
+#include <pulsecore/log.h>
+#include <pulsecore/namereg.h>
+#include <pulsecore/sink.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/core-util.h>
+
+#include "module-mmkbd-evdev-symdef.h"
+
+PA_MODULE_AUTHOR("Lennart Poettering");
+PA_MODULE_DESCRIPTION("Multimedia keyboard support via Linux evdev");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(FALSE);
+PA_MODULE_USAGE("device=<evdev device> sink=<sink name>");
+
+#define DEFAULT_DEVICE "/dev/input/event0"
+
+/*
+ * This isn't defined in older kernel headers and there is no way of
+ * detecting it.
+ */
+struct _input_id {
+    __u16 bustype;
+    __u16 vendor;
+    __u16 product;
+    __u16 version;
+};
+
+static const char* const valid_modargs[] = {
+    "device",
+    "sink",
+    NULL,
+};
+
+struct userdata {
+    int fd, fd_type;
+    pa_io_event *io;
+    char *sink_name;
+    pa_module *module;
+};
+
+static void io_callback(pa_mainloop_api *io, PA_GCC_UNUSED pa_io_event *e, PA_GCC_UNUSED int fd, pa_io_event_flags_t events, void*userdata) {
+    struct userdata *u = userdata;
+
+    pa_assert(io);
+    pa_assert(u);
+
+    if (events & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) {
+        pa_log("Lost connection to evdev device.");
+        goto fail;
+    }
+
+    if (events & PA_IO_EVENT_INPUT) {
+        struct input_event ev;
+
+        if (pa_loop_read(u->fd, &ev, sizeof(ev), &u->fd_type) <= 0) {
+            pa_log("Failed to read from event device: %s", pa_cstrerror(errno));
+            goto fail;
+        }
+
+        if (ev.type == EV_KEY && (ev.value == 1 || ev.value == 2)) {
+            enum { INVALID, UP, DOWN, MUTE_TOGGLE } volchange = INVALID;
+
+            pa_log_debug("Key code=%u, value=%u", ev.code, ev.value);
+
+            switch (ev.code) {
+                case KEY_VOLUMEDOWN:  volchange = DOWN; break;
+                case KEY_VOLUMEUP:    volchange = UP; break;
+                case KEY_MUTE:        volchange = MUTE_TOGGLE; break;
+            }
+
+            if (volchange != INVALID) {
+                pa_sink *s;
+
+                if (!(s = pa_namereg_get(u->module->core, u->sink_name, PA_NAMEREG_SINK, 1)))
+                    pa_log("Failed to get sink '%s'", u->sink_name);
+                else {
+                    int i;
+                    pa_cvolume cv = *pa_sink_get_volume(s);
+
+#define DELTA (PA_VOLUME_NORM/20)
+
+                    switch (volchange) {
+                        case UP:
+                            for (i = 0; i < cv.channels; i++) {
+                                cv.values[i] += DELTA;
+
+                                if (cv.values[i] > PA_VOLUME_NORM)
+                                    cv.values[i] = PA_VOLUME_NORM;
+                            }
+
+                            pa_sink_set_volume(s, &cv);
+                            break;
+
+                        case DOWN:
+                            for (i = 0; i < cv.channels; i++) {
+                                if (cv.values[i] >= DELTA)
+                                    cv.values[i] -= DELTA;
+                                else
+                                    cv.values[i] = PA_VOLUME_MUTED;
+                            }
+
+                            pa_sink_set_volume(s, &cv);
+                            break;
+
+                        case MUTE_TOGGLE:
+
+                            pa_sink_set_mute(s, !pa_sink_get_mute(s));
+                            break;
+
+                        case INVALID:
+                            ;
+                    }
+                }
+            }
+        }
+    }
+
+    return;
+
+fail:
+    u->module->core->mainloop->io_free(u->io);
+    u->io = NULL;
+
+    pa_module_unload_request(u->module);
+}
+
+#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8)))
+
+int pa__init(pa_module*m) {
+
+    pa_modargs *ma = NULL;
+    struct userdata *u;
+    int version;
+    struct _input_id input_id;
+    char name[256];
+    uint8_t evtype_bitmask[EV_MAX/8 + 1];
+
+    pa_assert(m);
+
+    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+        pa_log("Failed to parse module arguments");
+        goto fail;
+    }
+
+    m->userdata = u = pa_xnew(struct userdata,1);
+    u->module = m;
+    u->io = NULL;
+    u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
+    u->fd = -1;
+    u->fd_type = 0;
+
+    if ((u->fd = open(pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), O_RDONLY)) < 0) {
+        pa_log("failed to open evdev device: %s", pa_cstrerror(errno));
+        goto fail;
+    }
+
+    if (ioctl(u->fd, EVIOCGVERSION, &version) < 0) {
+        pa_log("EVIOCGVERSION failed: %s", pa_cstrerror(errno));
+        goto fail;
+    }
+
+    pa_log_info("evdev driver version %i.%i.%i", version >> 16, (version >> 8) & 0xff, version & 0xff);
+
+    if(ioctl(u->fd, EVIOCGID, &input_id)) {
+        pa_log("EVIOCGID failed: %s", pa_cstrerror(errno));
+        goto fail;
+    }
+
+    pa_log_info("evdev vendor 0x%04hx product 0x%04hx version 0x%04hx bustype %u",
+                input_id.vendor, input_id.product, input_id.version, input_id.bustype);
+
+    memset(name, 0, sizeof(name));
+    if(ioctl(u->fd, EVIOCGNAME(sizeof(name)), name) < 0) {
+        pa_log("EVIOCGNAME failed: %s", pa_cstrerror(errno));
+        goto fail;
+    }
+
+    pa_log_info("evdev device name: %s", name);
+
+    memset(evtype_bitmask, 0, sizeof(evtype_bitmask));
+    if (ioctl(u->fd, EVIOCGBIT(0, EV_MAX), evtype_bitmask) < 0) {
+        pa_log("EVIOCGBIT failed: %s", pa_cstrerror(errno));
+        goto fail;
+    }
+
+    if (!test_bit(EV_KEY, evtype_bitmask)) {
+        pa_log("Device has no keys.");
+        goto fail;
+    }
+
+    u->io = m->core->mainloop->io_new(m->core->mainloop, u->fd, PA_IO_EVENT_INPUT|PA_IO_EVENT_HANGUP, io_callback, u);
+
+    pa_modargs_free(ma);
+
+    return 0;
+
+fail:
+
+    if (ma)
+        pa_modargs_free(ma);
+
+    pa__done(m);
+    return -1;
+}
+
+void pa__done(pa_module*m) {
+    struct userdata *u;
+
+    pa_assert(m);
+
+    if (!(u = m->userdata))
+        return;
+
+    if (u->io)
+        m->core->mainloop->io_free(u->io);
+
+    if (u->fd >= 0)
+        pa_assert_se(pa_close(u->fd) == 0);
+
+    pa_xfree(u->sink_name);
+    pa_xfree(u);
+}