Olivier Naudan | b28313f | 2012-04-16 08:10:18 -0400 | [diff] [blame] | 1 | /* GStreamer |
| 2 | * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk> |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Library General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * This library is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Library General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Library General Public |
| 15 | * License along with this library; if not, write to the |
Sebastian Dröge | e6513c1 | 2013-07-14 12:12:42 +0200 | [diff] [blame] | 16 | * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| 17 | * Boston, MA 02110-1301, USA. |
Olivier Naudan | b28313f | 2012-04-16 08:10:18 -0400 | [diff] [blame] | 18 | */ |
| 19 | /** |
| 20 | * SECTION:element-gsettingsvideosrc |
| 21 | * |
| 22 | * This element outputs sound to the videosrc that has been configured in |
| 23 | * GSettings by the user. |
| 24 | * |
| 25 | * <refsect2> |
| 26 | * <title>Example launch line</title> |
| 27 | * |[ |
Sebastian Dröge | 8aae452 | 2012-09-18 10:21:31 +0200 | [diff] [blame] | 28 | * gst-launch gsettingsvideosrc ! videoconvert ! videoscale ! autovideosink |
Olivier Naudan | b28313f | 2012-04-16 08:10:18 -0400 | [diff] [blame] | 29 | * ]| Play from configured videosrc |
| 30 | * </refsect2> |
| 31 | */ |
| 32 | |
| 33 | #ifdef HAVE_CONFIG_H |
| 34 | #include <config.h> |
| 35 | #endif |
| 36 | |
| 37 | #include <gst/gst.h> |
| 38 | #include <gst/glib-compat-private.h> |
| 39 | #include <string.h> |
| 40 | |
| 41 | #include "gstgsettingsvideosrc.h" |
| 42 | #include "gstgsettings.h" |
| 43 | |
| 44 | GST_BOILERPLATE (GstGSettingsVideoSrc, gst_gsettings_video_src, GstSwitchSrc, |
| 45 | GST_TYPE_SWITCH_SRC); |
| 46 | |
| 47 | static gboolean |
| 48 | gst_gsettings_video_src_change_child (GstGSettingsVideoSrc * src) |
| 49 | { |
| 50 | gchar *new_string; |
| 51 | GError *err = NULL; |
| 52 | GstElement *new_kid; |
| 53 | |
| 54 | GST_OBJECT_LOCK (src); |
| 55 | new_string = |
| 56 | g_settings_get_string (src->settings, GST_GSETTINGS_KEY_VIDEOSRC); |
| 57 | |
| 58 | if (new_string != NULL && src->gsettings_str != NULL && |
| 59 | (strlen (new_string) == 0 || |
| 60 | strcmp (src->gsettings_str, new_string) == 0)) { |
| 61 | g_free (new_string); |
| 62 | GST_DEBUG_OBJECT (src, |
| 63 | "GSettings key was updated, but it didn't change. Ignoring"); |
| 64 | GST_OBJECT_UNLOCK (src); |
| 65 | return TRUE; |
| 66 | } |
| 67 | GST_OBJECT_UNLOCK (src); |
| 68 | |
| 69 | GST_DEBUG_OBJECT (src, "GSettings key changed from '%s' to '%s'", |
| 70 | GST_STR_NULL (src->gsettings_str), GST_STR_NULL (new_string)); |
| 71 | |
| 72 | if (new_string) { |
| 73 | new_kid = gst_parse_bin_from_description (new_string, TRUE, &err); |
| 74 | if (err) { |
| 75 | GST_ERROR_OBJECT (src, "error creating bin '%s': %s", new_string, |
| 76 | err->message); |
| 77 | g_error_free (err); |
| 78 | } |
| 79 | } else { |
| 80 | new_kid = NULL; |
| 81 | } |
| 82 | |
| 83 | if (new_kid == NULL) { |
| 84 | GST_ELEMENT_ERROR (src, LIBRARY, SETTINGS, (NULL), |
| 85 | ("Failed to render video src from GSettings")); |
| 86 | goto fail; |
| 87 | } |
| 88 | |
| 89 | if (!gst_switch_src_set_child (GST_SWITCH_SRC (src), new_kid)) { |
| 90 | GST_WARNING_OBJECT (src, "Failed to update child element"); |
| 91 | goto fail; |
| 92 | } |
| 93 | |
| 94 | g_free (src->gsettings_str); |
| 95 | src->gsettings_str = new_string; |
| 96 | |
| 97 | return TRUE; |
| 98 | |
| 99 | fail: |
| 100 | g_free (new_string); |
| 101 | return FALSE; |
| 102 | } |
| 103 | |
| 104 | static void |
| 105 | on_changed (GSettings * settings, gchar * key, GstGSettingsVideoSrc * src) |
| 106 | { |
| 107 | if (!g_str_equal (key, "videosrc")) |
| 108 | return; |
| 109 | |
| 110 | gst_gsettings_video_src_change_child (src); |
| 111 | } |
| 112 | |
| 113 | static gboolean |
| 114 | gst_gsettings_video_src_start (GstGSettingsVideoSrc * src) |
| 115 | { |
| 116 | GError *err = NULL; |
| 117 | GThread *thread; |
| 118 | |
| 119 | src->loop = g_main_loop_new (src->context, FALSE); |
| 120 | |
| 121 | thread = |
| 122 | g_thread_create ((GThreadFunc) g_main_loop_run, src->loop, FALSE, &err); |
| 123 | if (!thread) { |
| 124 | GST_ELEMENT_ERROR (src, CORE, STATE_CHANGE, (NULL), |
| 125 | ("Failed to create new thread: %s", err->message)); |
| 126 | g_error_free (err); |
| 127 | g_main_loop_unref (src->loop); |
| 128 | src->loop = NULL; |
| 129 | return FALSE; |
| 130 | } |
| 131 | |
| 132 | g_main_context_push_thread_default (src->context); |
| 133 | src->settings = g_settings_new (GST_GSETTINGS_SCHEMA); |
| 134 | src->changed_id = |
| 135 | g_signal_connect_data (G_OBJECT (src->settings), "changed", |
| 136 | G_CALLBACK (on_changed), gst_object_ref (src), |
| 137 | (GClosureNotify) gst_object_unref, 0); |
| 138 | g_main_context_pop_thread_default (src->context); |
| 139 | |
| 140 | return TRUE; |
| 141 | } |
| 142 | |
| 143 | static gboolean |
| 144 | gst_gsettings_video_src_reset (GstGSettingsVideoSrc * src) |
| 145 | { |
| 146 | gst_switch_src_set_child (GST_SWITCH_SRC (src), NULL); |
| 147 | |
| 148 | if (src->changed_id) { |
| 149 | g_signal_handler_disconnect (src->settings, src->changed_id); |
| 150 | src->changed_id = 0; |
| 151 | } |
| 152 | |
| 153 | if (src->loop) { |
| 154 | g_main_loop_quit (src->loop); |
| 155 | g_main_loop_unref (src->loop); |
| 156 | src->loop = NULL; |
| 157 | } |
| 158 | |
| 159 | if (src->settings) { |
| 160 | g_object_unref (src->settings); |
| 161 | src->settings = NULL; |
| 162 | } |
| 163 | |
| 164 | GST_OBJECT_LOCK (src); |
| 165 | g_free (src->gsettings_str); |
| 166 | src->gsettings_str = NULL; |
| 167 | GST_OBJECT_UNLOCK (src); |
| 168 | |
| 169 | return TRUE; |
| 170 | } |
| 171 | |
| 172 | static void |
| 173 | gst_gsettings_video_src_finalize (GObject * object) |
| 174 | { |
| 175 | GstGSettingsVideoSrc *src = GST_GSETTINGS_VIDEO_SRC (object); |
| 176 | |
| 177 | g_free (src->gsettings_str); |
| 178 | g_main_context_unref (src->context); |
| 179 | |
| 180 | GST_CALL_PARENT (G_OBJECT_CLASS, finalize, ((GObject *) (src))); |
| 181 | } |
| 182 | |
| 183 | static GstStateChangeReturn |
| 184 | gst_gsettings_video_src_change_state (GstElement * element, |
| 185 | GstStateChange transition) |
| 186 | { |
| 187 | GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; |
| 188 | GstGSettingsVideoSrc *src = GST_GSETTINGS_VIDEO_SRC (element); |
| 189 | |
| 190 | switch (transition) { |
| 191 | case GST_STATE_CHANGE_NULL_TO_READY: |
| 192 | if (!gst_gsettings_video_src_start (src)) |
| 193 | return GST_STATE_CHANGE_FAILURE; |
| 194 | |
| 195 | if (!gst_gsettings_video_src_change_child (src)) { |
| 196 | gst_gsettings_video_src_reset (src); |
| 197 | return GST_STATE_CHANGE_FAILURE; |
| 198 | } |
| 199 | break; |
| 200 | default: |
| 201 | break; |
| 202 | } |
| 203 | |
| 204 | ret = GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS, change_state, |
| 205 | (element, transition), GST_STATE_CHANGE_SUCCESS); |
| 206 | |
| 207 | switch (transition) { |
| 208 | case GST_STATE_CHANGE_READY_TO_NULL: |
| 209 | gst_gsettings_video_src_reset (src); |
| 210 | break; |
| 211 | default: |
| 212 | break; |
| 213 | } |
| 214 | |
| 215 | return ret; |
| 216 | } |
| 217 | |
| 218 | static void |
| 219 | gst_gsettings_video_src_init (GstGSettingsVideoSrc * src, |
| 220 | GstGSettingsVideoSrcClass * g_class) |
| 221 | { |
| 222 | src->context = g_main_context_new (); |
| 223 | gst_gsettings_video_src_reset (src); |
| 224 | } |
| 225 | |
| 226 | static void |
| 227 | gst_gsettings_video_src_base_init (gpointer klass) |
| 228 | { |
| 229 | GstElementClass *eklass = GST_ELEMENT_CLASS (klass); |
| 230 | |
Sebastian Dröge | 6a5ec01 | 2012-10-25 14:10:09 +0200 | [diff] [blame] | 231 | gst_element_class_set_static_metadata (eklass, "GSettings video src", |
Olivier Naudan | b28313f | 2012-04-16 08:10:18 -0400 | [diff] [blame] | 232 | "Src/Video", |
| 233 | "Video src embedding the GSettings preferences for video input", |
| 234 | "Sebastian Dröge <sebastian.droege@collabora.co.uk>"); |
| 235 | } |
| 236 | |
| 237 | static void |
| 238 | gst_gsettings_video_src_class_init (GstGSettingsVideoSrcClass * klass) |
| 239 | { |
| 240 | GObjectClass *oklass = G_OBJECT_CLASS (klass); |
| 241 | GstElementClass *eklass = GST_ELEMENT_CLASS (klass); |
| 242 | |
| 243 | oklass->finalize = gst_gsettings_video_src_finalize; |
| 244 | |
| 245 | eklass->change_state = gst_gsettings_video_src_change_state; |
| 246 | } |