add new module module-position-event-sounds for positioning event sounds in space

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2507 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 167 insertions, 0 deletions

diff --git a/src/modules/module-position-event-sounds.c b/src/modules/module-position-event-sounds.c
new file mode 100644
index 00000000..30f0fd9f
--- /dev/null
+++ b/src/modules/module-position-event-sounds.c
@@ -0,0 +1,167 @@
+/* $Id$ */
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 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 <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#include <pulse/xmalloc.h>
+#include <pulse/volume.h>
+#include <pulse/channelmap.h>
+
+#include <pulsecore/core-error.h>
+#include <pulsecore/module.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/log.h>
+#include <pulsecore/sink-input.h>
+
+#include "module-position-event-sounds-symdef.h"
+
+PA_MODULE_AUTHOR("Lennart Poettering");
+PA_MODULE_DESCRIPTION("Position event sounds between L and R depending on the position on screen of the widget triggering them.");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(TRUE);
+
+static const char* const valid_modargs[] = {
+    NULL
+};
+
+struct userdata {
+    pa_core *core;
+    pa_hook_slot *sink_input_fixate_hook_slot;
+};
+
+static pa_bool_t is_left(pa_channel_position_t p) {
+    return
+        p == PA_CHANNEL_POSITION_FRONT_LEFT ||
+        p == PA_CHANNEL_POSITION_REAR_LEFT ||
+        p == PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER ||
+        p == PA_CHANNEL_POSITION_SIDE_LEFT ||
+        p == PA_CHANNEL_POSITION_TOP_FRONT_LEFT ||
+        p == PA_CHANNEL_POSITION_TOP_REAR_LEFT;
+}
+
+static pa_bool_t is_right(pa_channel_position_t p) {
+    return
+        p == PA_CHANNEL_POSITION_FRONT_RIGHT ||
+        p == PA_CHANNEL_POSITION_REAR_RIGHT||
+        p == PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER ||
+        p == PA_CHANNEL_POSITION_SIDE_RIGHT ||
+        p == PA_CHANNEL_POSITION_TOP_FRONT_RIGHT ||
+        p == PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
+}
+
+static pa_hook_result_t sink_input_fixate_hook_callback(pa_core *core, pa_sink_input_new_data *data, struct userdata *u) {
+    const char *hpos;
+    double f;
+    unsigned c;
+    char t[PA_CVOLUME_SNPRINT_MAX];
+
+    pa_assert(data);
+
+    if (!(hpos = pa_proplist_gets(data->proplist, PA_PROP_EVENT_MOUSE_HPOS)))
+        return PA_HOOK_OK;
+
+    if (pa_atod(hpos, &f) < 0) {
+        pa_log_warn("Failed to parse "PA_PROP_EVENT_MOUSE_HPOS" property '%s'.", hpos);
+        return PA_HOOK_OK;
+    }
+
+    if (f < 0.0 || f > 1.0) {
+        pa_log_warn("Property "PA_PROP_EVENT_MOUSE_HPOS" out of range %0.2f", f);
+        return PA_HOOK_OK;
+    }
+
+    pa_log_debug("Positioning event sound '%s' at %0.2f.", pa_strnull(pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID)), f);
+
+    if (!data->volume_is_set) {
+        pa_cvolume_reset(&data->volume, data->sample_spec.channels);
+        data->volume_is_set = TRUE;
+    }
+
+    for (c = 0; c < data->sample_spec.channels; c++) {
+
+        if (is_left(data->channel_map.map[c]))
+            data->volume.values[c] =
+                pa_sw_volume_multiply(data->volume.values[c], (pa_volume_t) (PA_VOLUME_NORM * (1.0 - f)));
+
+        if (is_right(data->channel_map.map[c]))
+            data->volume.values[c] =
+                pa_sw_volume_multiply(data->volume.values[c], (pa_volume_t) (PA_VOLUME_NORM * f));
+    }
+
+    pa_log_debug("Final volume %s.", pa_cvolume_snprint(t, sizeof(t), &data->volume));
+
+    return PA_HOOK_OK;
+}
+
+int pa__init(pa_module*m) {
+    pa_modargs *ma = NULL;
+    struct userdata *u;
+
+    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->core = m->core;
+    u->sink_input_fixate_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_FIXATE], (pa_hook_cb_t) sink_input_fixate_hook_callback, u);
+
+    pa_modargs_free(ma);
+
+    return 0;
+
+fail:
+    pa__done(m);
+
+    if (ma)
+        pa_modargs_free(ma);
+
+    return  -1;
+}
+
+void pa__done(pa_module*m) {
+    struct userdata* u;
+
+    pa_assert(m);
+
+    if (!(u = m->userdata))
+        return;
+
+    if (u->sink_input_fixate_hook_slot)
+        pa_hook_slot_free(u->sink_input_fixate_hook_slot);
+
+    pa_xfree(u);
+}