/* GStreamer * Copyright (C) 2010 Thiago Santos * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-gstcamerabin2 * * The gstcamerabin2 element does FIXME stuff. * * Note that camerabin2 is still UNSTABLE, EXPERIMENTAL and under heavy * development. */ /* * Detail Topics: * * videorecordingbin state management (for now on called 'videobin') * - The problem: keeping videobin state in sync with camerabin will make it * go to playing when it might not be used, causing its internal * filesink to open a file that might be left blank. * - The solution: videobin state is set to locked upon its creation and camerabin * registers itself on the notify::ready-for-capture of the src. * Whenever the src readyness goes to FALSE it means a new * capture is starting. If we are on video mode, the videobin's * state is set to NULL and then PLAYING (in between this we * have room to set the destination filename). * There is no problem to leave it on playing after an EOS, so * no action is taken on stop-capture. * * - TODO: What happens when an error pops? * - TODO: Should we split properties in image/video variants? We already do so * for some of them * * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "gstcamerabin2.h" GST_DEBUG_CATEGORY_STATIC (gst_camera_bin_debug); #define GST_CAT_DEFAULT gst_camera_bin_debug /* prototypes */ enum { PROP_0, PROP_MODE, PROP_LOCATION, PROP_CAMERA_SRC, PROP_IMAGE_CAPTURE_SUPPORTED_CAPS, PROP_VIDEO_CAPTURE_SUPPORTED_CAPS, PROP_IMAGE_CAPTURE_CAPS, PROP_VIDEO_CAPTURE_CAPS, PROP_POST_PREVIEWS, PROP_PREVIEW_CAPS, PROP_VIDEO_ENCODING_PROFILE, PROP_IMAGE_FILTER, PROP_VIDEO_FILTER, PROP_VIEWFINDER_FILTER, PROP_PREVIEW_FILTER, PROP_VIEWFINDER_SINK, PROP_VIEWFINDER_SUPPORTED_CAPS, PROP_VIEWFINDER_CAPS, PROP_AUDIO_SRC, PROP_MUTE_AUDIO, PROP_AUDIO_CAPTURE_SUPPORTED_CAPS, PROP_AUDIO_CAPTURE_CAPS, PROP_ZOOM }; enum { /* action signals */ START_CAPTURE_SIGNAL, STOP_CAPTURE_SIGNAL, /* emit signals */ LAST_SIGNAL }; static guint camerabin_signals[LAST_SIGNAL]; #define DEFAULT_MODE MODE_IMAGE #define DEFAULT_VID_LOCATION "vid_%d" #define DEFAULT_IMG_LOCATION "img_%d" #define DEFAULT_POST_PREVIEWS TRUE #define DEFAULT_MUTE_AUDIO FALSE #define DEFAULT_AUDIO_SRC "autoaudiosrc" /******************************** * Standard GObject boilerplate * * and GObject types * ********************************/ static GstPipelineClass *parent_class; static void gst_camera_bin_class_init (GstCameraBinClass * klass); static void gst_camera_bin_base_init (gpointer klass); static void gst_camera_bin_init (GstCameraBin * camera); static void gst_camera_bin_dispose (GObject * object); static void gst_camera_bin_finalize (GObject * object); static void gst_camera_bin_handle_message (GstBin * bin, GstMessage * message); GType gst_camera_bin_get_type (void) { static GType gst_camera_bin_type = 0; static const GInterfaceInfo camerabin_tagsetter_info = { NULL, NULL, NULL, }; if (!gst_camera_bin_type) { static const GTypeInfo gst_camera_bin_info = { sizeof (GstCameraBinClass), (GBaseInitFunc) gst_camera_bin_base_init, NULL, (GClassInitFunc) gst_camera_bin_class_init, NULL, NULL, sizeof (GstCameraBin), 0, (GInstanceInitFunc) gst_camera_bin_init, NULL }; gst_camera_bin_type = g_type_register_static (GST_TYPE_PIPELINE, "GstCameraBin2", &gst_camera_bin_info, 0); g_type_add_interface_static (gst_camera_bin_type, GST_TYPE_TAG_SETTER, &camerabin_tagsetter_info); } return gst_camera_bin_type; } /* GObject class functions */ static void gst_camera_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_camera_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); /* Element class functions */ static GstStateChangeReturn gst_camera_bin_change_state (GstElement * element, GstStateChange trans); /* Camerabin functions */ static GstEvent * gst_camera_bin_new_event_renegotiate (void) { return gst_event_new_custom (GST_EVENT_CUSTOM_BOTH, gst_structure_new ("renegotiate", NULL)); } static void gst_camera_bin_start_capture (GstCameraBin * camerabin) { const GstTagList *taglist; GST_DEBUG_OBJECT (camerabin, "Received start-capture"); taglist = gst_tag_setter_get_tag_list (GST_TAG_SETTER (camerabin)); if (taglist) { GstPad *active_pad; GST_DEBUG_OBJECT (camerabin, "Pushing tags from application: %" GST_PTR_FORMAT, taglist); if (camerabin->mode == MODE_IMAGE) { active_pad = gst_element_get_static_pad (camerabin->src, GST_BASE_CAMERA_SRC_IMAGE_PAD_NAME); } else { active_pad = gst_element_get_static_pad (camerabin->src, GST_BASE_CAMERA_SRC_VIDEO_PAD_NAME); } gst_pad_push_event (active_pad, gst_event_new_tag (gst_tag_list_copy (taglist))); gst_object_unref (active_pad); } if (camerabin->mode == MODE_VIDEO && camerabin->audio_src) { gst_element_set_state (camerabin->audio_src, GST_STATE_READY); /* need to reset eos status (pads could be flushing) */ gst_element_set_state (camerabin->audio_queue, GST_STATE_READY); gst_element_set_state (camerabin->audio_convert, GST_STATE_READY); gst_element_set_state (camerabin->audio_capsfilter, GST_STATE_READY); gst_element_set_state (camerabin->audio_volume, GST_STATE_READY); gst_element_sync_state_with_parent (camerabin->audio_queue); gst_element_sync_state_with_parent (camerabin->audio_convert); gst_element_sync_state_with_parent (camerabin->audio_capsfilter); gst_element_sync_state_with_parent (camerabin->audio_volume); } g_signal_emit_by_name (camerabin->src, "start-capture", NULL); if (camerabin->mode == MODE_VIDEO && camerabin->audio_src) gst_element_set_state (camerabin->audio_src, GST_STATE_PLAYING); } static void gst_camera_bin_stop_capture (GstCameraBin * camerabin) { GST_DEBUG_OBJECT (camerabin, "Received stop-capture"); if (camerabin->src) g_signal_emit_by_name (camerabin->src, "stop-capture", NULL); if (camerabin->mode == MODE_VIDEO && camerabin->audio_src) { gst_element_send_event (camerabin->audio_src, gst_event_new_eos ()); gst_element_set_state (camerabin->audio_src, GST_STATE_NULL); } } static void gst_camera_bin_change_mode (GstCameraBin * camerabin, gint mode) { if (mode == camerabin->mode) return; GST_DEBUG_OBJECT (camerabin, "Changing mode to %d", mode); /* stop any ongoing capture */ gst_camera_bin_stop_capture (camerabin); camerabin->mode = mode; if (camerabin->src) g_object_set (camerabin->src, "mode", mode, NULL); } static void gst_camera_bin_src_notify_readyforcapture (GObject * obj, GParamSpec * pspec, gpointer user_data) { GstCameraBin *camera = GST_CAMERA_BIN_CAST (user_data); gboolean ready; if (camera->mode == MODE_VIDEO) { g_object_get (camera->src, "ready-for-capture", &ready, NULL); if (!ready) { gchar *location; /* a video recording is about to start, we reset the videobin to clear eos/flushing state * also need to clean the queue ! capsfilter before it */ gst_element_set_state (camera->encodebin, GST_STATE_NULL); gst_element_set_state (camera->videosink, GST_STATE_NULL); gst_element_set_state (camera->videobin_queue, GST_STATE_NULL); gst_element_set_state (camera->videobin_capsfilter, GST_STATE_NULL); location = g_strdup_printf (camera->video_location, camera->video_index++); GST_DEBUG_OBJECT (camera, "Switching videobin location to %s", location); g_object_set (camera->videosink, "location", location, NULL); g_free (location); gst_element_set_state (camera->encodebin, GST_STATE_PLAYING); gst_element_set_state (camera->videosink, GST_STATE_PLAYING); gst_element_set_state (camera->videobin_capsfilter, GST_STATE_PLAYING); gst_element_set_state (camera->videobin_queue, GST_STATE_PLAYING); } } } static void gst_camera_bin_dispose (GObject * object) { GstCameraBin *camerabin = GST_CAMERA_BIN_CAST (object); g_free (camerabin->image_location); g_free (camerabin->video_location); if (camerabin->src_capture_notify_id) g_signal_handler_disconnect (camerabin->src, camerabin->src_capture_notify_id); if (camerabin->src) gst_object_unref (camerabin->src); if (camerabin->user_src) gst_object_unref (camerabin->user_src); if (camerabin->audio_src) gst_object_unref (camerabin->audio_src); if (camerabin->user_audio_src) gst_object_unref (camerabin->user_audio_src); if (camerabin->audio_capsfilter) gst_object_unref (camerabin->audio_capsfilter); if (camerabin->audio_queue) gst_object_unref (camerabin->audio_queue); if (camerabin->audio_convert) gst_object_unref (camerabin->audio_convert); if (camerabin->audio_volume) gst_object_unref (camerabin->audio_volume); if (camerabin->viewfinderbin) gst_object_unref (camerabin->viewfinderbin); if (camerabin->viewfinderbin_queue) gst_object_unref (camerabin->viewfinderbin_queue); if (camerabin->viewfinderbin_capsfilter) gst_object_unref (camerabin->viewfinderbin_capsfilter); if (camerabin->encodebin_signal_id) g_signal_handler_disconnect (camerabin->encodebin, camerabin->encodebin_signal_id); if (camerabin->videosink) gst_object_unref (camerabin->videosink); if (camerabin->encodebin) gst_object_unref (camerabin->encodebin); if (camerabin->videobin_queue) gst_object_unref (camerabin->videobin_queue); if (camerabin->videobin_capsfilter) gst_object_unref (camerabin->videobin_capsfilter); if (camerabin->imagebin) gst_object_unref (camerabin->imagebin); if (camerabin->imagebin_queue) gst_object_unref (camerabin->imagebin_queue); if (camerabin->imagebin_capsfilter) gst_object_unref (camerabin->imagebin_capsfilter); if (camerabin->video_filter) gst_object_unref (camerabin->video_filter); if (camerabin->image_filter) gst_object_unref (camerabin->image_filter); if (camerabin->viewfinder_filter) gst_object_unref (camerabin->viewfinder_filter); if (camerabin->user_video_filter) gst_object_unref (camerabin->user_video_filter); if (camerabin->user_image_filter) gst_object_unref (camerabin->user_image_filter); if (camerabin->user_viewfinder_filter) gst_object_unref (camerabin->user_viewfinder_filter); if (camerabin->video_profile) gst_encoding_profile_unref (camerabin->video_profile); if (camerabin->preview_caps) gst_caps_replace (&camerabin->preview_caps, NULL); if (camerabin->preview_filter) { gst_object_unref (camerabin->preview_filter); camerabin->preview_filter = NULL; } G_OBJECT_CLASS (parent_class)->dispose (object); } static void gst_camera_bin_finalize (GObject * object) { G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_camera_bin_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details_simple (element_class, "CameraBin2", "Generic/Bin/Camera", "CameraBin2", "Thiago Santos "); } static void gst_camera_bin_class_init (GstCameraBinClass * klass) { GObjectClass *object_class; GstElementClass *element_class; GstBinClass *bin_class; parent_class = g_type_class_peek_parent (klass); object_class = G_OBJECT_CLASS (klass); element_class = GST_ELEMENT_CLASS (klass); bin_class = GST_BIN_CLASS (klass); object_class->dispose = gst_camera_bin_dispose; object_class->finalize = gst_camera_bin_finalize; object_class->set_property = gst_camera_bin_set_property; object_class->get_property = gst_camera_bin_get_property; element_class->change_state = GST_DEBUG_FUNCPTR (gst_camera_bin_change_state); bin_class->handle_message = gst_camera_bin_handle_message; klass->start_capture = gst_camera_bin_start_capture; klass->stop_capture = gst_camera_bin_stop_capture; /** * GstCameraBin:mode: * * Set the mode of operation: still image capturing or video recording. */ g_object_class_install_property (object_class, PROP_MODE, g_param_spec_enum ("mode", "Mode", "The capture mode (still image capture or video recording)", GST_TYPE_CAMERABIN_MODE, DEFAULT_MODE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_LOCATION, g_param_spec_string ("location", "Location", "Location to save the captured files. A %d might be used on the" "filename as a placeholder for a numeric index of the capture." "Default for images is img_%d and vid_%d for videos", DEFAULT_IMG_LOCATION, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_CAMERA_SRC, g_param_spec_object ("camera-src", "Camera source", "The camera source element to be used", GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_AUDIO_SRC, g_param_spec_object ("audio-src", "Audio source", "The audio source element to be used on video recordings", GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_MUTE_AUDIO, g_param_spec_boolean ("mute", "Mute", "If the audio recording should be muted. Note that this still " "saves audio data to the resulting file, but they are silent. Use " "a video-profile without audio to disable audio completely", DEFAULT_MUTE_AUDIO, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_AUDIO_CAPTURE_SUPPORTED_CAPS, g_param_spec_boxed ("audio-capture-supported-caps", "Audio capture supported caps", "Formats supported for capturing audio represented as GstCaps", GST_TYPE_CAPS, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_AUDIO_CAPTURE_CAPS, g_param_spec_boxed ("audio-capture-caps", "Audio capture caps", "Format to capture audio for video recording represented as GstCaps", GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_IMAGE_CAPTURE_SUPPORTED_CAPS, g_param_spec_boxed ("image-capture-supported-caps", "Image capture supported caps", "Formats supported for capturing images represented as GstCaps", GST_TYPE_CAPS, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_VIDEO_CAPTURE_SUPPORTED_CAPS, g_param_spec_boxed ("video-capture-supported-caps", "Video capture supported caps", "Formats supported for capturing videos represented as GstCaps", GST_TYPE_CAPS, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_IMAGE_CAPTURE_CAPS, g_param_spec_boxed ("image-capture-caps", "Image capture caps", "Caps for image capture", GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_VIDEO_CAPTURE_CAPS, g_param_spec_boxed ("video-capture-caps", "Video capture caps", "Caps for video capture", GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_POST_PREVIEWS, g_param_spec_boolean ("post-previews", "Post Previews", "If capture preview images should be posted to the bus", DEFAULT_POST_PREVIEWS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_PREVIEW_CAPS, g_param_spec_boxed ("preview-caps", "Preview caps", "The caps of the preview image to be posted", GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_VIDEO_ENCODING_PROFILE, gst_param_spec_mini_object ("video-profile", "Video Profile", "The GstEncodingProfile to use for video recording. Audio is enabled " "when this profile supports audio.", GST_TYPE_ENCODING_PROFILE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_IMAGE_FILTER, g_param_spec_object ("image-filter", "Image filter", "The element that will process captured image frames. (Should be" " set on NULL state)", GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_VIDEO_FILTER, g_param_spec_object ("video-filter", "Video filter", "The element that will process captured video frames. (Should be" " set on NULL state)", GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_VIEWFINDER_FILTER, g_param_spec_object ("viewfinder-filter", "Viewfinder filter", "The element that will process frames going to the viewfinder." " (Should be set on NULL state)", GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_PREVIEW_FILTER, g_param_spec_object ("preview-filter", "Preview filter", "The element that will process preview buffers." " (Should be set on NULL state)", GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_VIEWFINDER_SINK, g_param_spec_object ("viewfinder-sink", "Viewfinder sink", "The video sink of the viewfinder.", GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_VIEWFINDER_CAPS, g_param_spec_boxed ("viewfinder-caps", "Viewfinder caps", "Restricts the caps that can be used on the viewfinder", GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_ZOOM, g_param_spec_float ("zoom", "Zoom", "Digital zoom factor (e.g. 1.5 means 1.5x)", MIN_ZOOM, MAX_ZOOM, DEFAULT_ZOOM, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /* TODO review before going stable * We have viewfinder-supported-caps that returns the caps that the * camerasrc can produce on its viewfinder pad, this could easily be * confused with what the viewfinder-sink accepts. * * Do we want to add a 'viewfinder-sink-supported-caps' or maybe change * the name of this property? */ g_object_class_install_property (object_class, PROP_VIEWFINDER_SUPPORTED_CAPS, g_param_spec_boxed ("viewfinder-supported-caps", "Camera source Viewfinder pad supported caps", "The caps that the camera source can produce on the viewfinder pad", GST_TYPE_CAPS, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); /** * GstCameraBin::capture-start: * @camera: the camera bin element * * Starts image capture or video recording depending on the Mode. */ camerabin_signals[START_CAPTURE_SIGNAL] = g_signal_new ("start-capture", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstCameraBinClass, start_capture), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); /** * GstCameraBin::capture-stop: * @camera: the camera bin element */ camerabin_signals[STOP_CAPTURE_SIGNAL] = g_signal_new ("stop-capture", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstCameraBinClass, stop_capture), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); } static void gst_camera_bin_init (GstCameraBin * camera) { camera->post_previews = DEFAULT_POST_PREVIEWS; camera->mode = DEFAULT_MODE; camera->video_location = g_strdup (DEFAULT_VID_LOCATION); camera->image_location = g_strdup (DEFAULT_IMG_LOCATION); camera->viewfinderbin = gst_element_factory_make ("viewfinderbin", "vf-bin"); camera->zoom = DEFAULT_ZOOM; /* capsfilters are created here as we proxy their caps properties and * this way we avoid having to store the caps while on NULL state to * set them later */ camera->videobin_capsfilter = gst_element_factory_make ("capsfilter", "videobin-capsfilter"); camera->imagebin_capsfilter = gst_element_factory_make ("capsfilter", "imagebin-capsfilter"); camera->viewfinderbin_capsfilter = gst_element_factory_make ("capsfilter", "viewfinderbin-capsfilter"); gst_bin_add_many (GST_BIN (camera), gst_object_ref (camera->viewfinderbin), gst_object_ref (camera->videobin_capsfilter), gst_object_ref (camera->imagebin_capsfilter), gst_object_ref (camera->viewfinderbin_capsfilter), NULL); /* these elements are only added if they are going to be used */ camera->audio_capsfilter = gst_element_factory_make ("capsfilter", "audio-capsfilter"); camera->audio_volume = gst_element_factory_make ("volume", "audio-volume"); } static void gst_image_capture_bin_post_image_done (GstCameraBin * camera, const gchar * filename) { GstMessage *msg; g_return_if_fail (filename != NULL); msg = gst_message_new_element (GST_OBJECT_CAST (camera), gst_structure_new ("image-done", "filename", G_TYPE_STRING, filename, NULL)); if (!gst_element_post_message (GST_ELEMENT_CAST (camera), msg)) GST_WARNING_OBJECT (camera, "Failed to post image-done message"); } static void gst_camera_bin_handle_message (GstBin * bin, GstMessage * message) { if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ELEMENT) { const GstStructure *structure = gst_message_get_structure (message); const gchar *filename; if (gst_structure_has_name (structure, "GstMultiFileSink")) { filename = gst_structure_get_string (structure, "filename"); if (filename) { gst_image_capture_bin_post_image_done (GST_CAMERA_BIN_CAST (bin), filename); } } } GST_BIN_CLASS (parent_class)->handle_message (bin, message); } /* * Transforms: * ... ! previous_element [ ! current_filter ] ! next_element ! ... * * into: * ... ! previous_element [ ! new_filter ] ! next_element ! ... * * Where current_filter and new_filter might or might not be NULL */ static void gst_camera_bin_check_and_replace_filter (GstCameraBin * camera, GstElement ** current_filter, GstElement * new_filter, GstElement * previous_element, GstElement * next_element) { if (*current_filter == new_filter) { GST_DEBUG_OBJECT (camera, "Current filter is the same as the previous, " "no switch needed."); return; } GST_DEBUG_OBJECT (camera, "Replacing current filter (%s) with new filter " "(%s)", *current_filter ? GST_ELEMENT_NAME (*current_filter) : "null", new_filter ? GST_ELEMENT_NAME (new_filter) : "null"); if (*current_filter) { gst_bin_remove (GST_BIN_CAST (camera), *current_filter); gst_object_unref (*current_filter); *current_filter = NULL; } else { /* unlink the pads */ gst_element_unlink (previous_element, next_element); } if (new_filter) { *current_filter = gst_object_ref (new_filter); gst_bin_add (GST_BIN_CAST (camera), gst_object_ref (new_filter)); gst_element_link_many (previous_element, new_filter, next_element, NULL); } else { gst_element_link (previous_element, next_element); } } static void encodebin_element_added (GstElement * encodebin, GstElement * new_element, GstCameraBin * camera) { GstElementFactory *factory = gst_element_get_factory (new_element); if (factory != NULL) { if (strcmp (GST_PLUGIN_FEATURE_NAME (factory), "audiorate") == 0 || strcmp (GST_PLUGIN_FEATURE_NAME (factory), "videorate") == 0) { g_object_set (new_element, "skip-to-first", TRUE, NULL); } } } #define VIDEO_PAD 1 #define AUDIO_PAD 2 static GstPad * encodebin_find_pad (GstCameraBin * camera, gint pad_type) { GstPad *pad = NULL; GstIterator *iter; gboolean done; GstElement *encodebin = camera->encodebin; GST_DEBUG_OBJECT (camera, "Looking at encodebin pads, searching for %s pad", VIDEO_PAD ? "video" : "audio"); iter = gst_element_iterate_sink_pads (encodebin); done = FALSE; while (!done) { switch (gst_iterator_next (iter, (gpointer *) & pad)) { case GST_ITERATOR_OK: if (pad_type == VIDEO_PAD) { if (strstr (GST_PAD_NAME (pad), "video") != NULL) { GST_DEBUG_OBJECT (camera, "Found video pad %s", GST_PAD_NAME (pad)); done = TRUE; break; } } else if (pad_type == AUDIO_PAD) { if (strstr (GST_PAD_NAME (pad), "audio") != NULL) { GST_DEBUG_OBJECT (camera, "Found audio pad %s", GST_PAD_NAME (pad)); done = TRUE; break; } } gst_object_unref (pad); pad = NULL; break; case GST_ITERATOR_RESYNC: gst_iterator_resync (iter); break; case GST_ITERATOR_ERROR: pad = NULL; done = TRUE; break; case GST_ITERATOR_DONE: pad = NULL; done = TRUE; break; } } gst_iterator_free (iter); /* no static pad, try requesting one */ if (pad == NULL) { GstElementClass *klass; GstPadTemplate *tmpl; GST_DEBUG_OBJECT (camera, "No pads found, trying to request one"); klass = GST_ELEMENT_GET_CLASS (encodebin); tmpl = gst_element_class_get_pad_template (klass, pad_type == VIDEO_PAD ? "video_%d" : "audio_%d"); pad = gst_element_request_pad (encodebin, tmpl, NULL, NULL); GST_DEBUG_OBJECT (camera, "Got pad: %s", pad ? GST_PAD_NAME (pad) : "null"); gst_object_unref (tmpl); } return pad; } static gboolean gst_camera_bin_video_profile_has_audio (GstCameraBin * camera) { const GList *list; g_return_val_if_fail (camera->video_profile != NULL, FALSE); if (GST_IS_ENCODING_VIDEO_PROFILE (camera->video_profile)) return FALSE; for (list = gst_encoding_container_profile_get_profiles ((GstEncodingContainerProfile *) camera->video_profile); list; list = g_list_next (list)) { GstEncodingProfile *profile = (GstEncodingProfile *) list->data; if (GST_IS_ENCODING_AUDIO_PROFILE (profile)) return TRUE; } return FALSE; } static GstPadLinkReturn gst_camera_bin_link_encodebin (GstCameraBin * camera, GstElement * element, gint padtype) { GstPadLinkReturn ret; GstPad *srcpad; GstPad *sinkpad = NULL; srcpad = gst_element_get_static_pad (element, "src"); sinkpad = encodebin_find_pad (camera, padtype); g_assert (srcpad != NULL); g_assert (sinkpad != NULL); ret = gst_pad_link (srcpad, sinkpad); gst_object_unref (sinkpad); gst_object_unref (srcpad); return ret; } /** * gst_camera_bin_create_elements: * @param camera: the #GstCameraBin * * Creates all elements inside #GstCameraBin * * Each of the pads on the camera source is linked as follows: * .pad ! queue ! capsfilter ! correspondingbin * * Where 'correspondingbin' is the bin appropriate for * the camera source pad. */ static gboolean gst_camera_bin_create_elements (GstCameraBin * camera) { gboolean new_src = FALSE; gboolean new_audio_src = FALSE; gboolean has_audio; gboolean profile_switched = FALSE; if (!camera->elements_created) { camera->encodebin = gst_element_factory_make ("encodebin", NULL); camera->encodebin_signal_id = g_signal_connect (camera->encodebin, "element-added", (GCallback) encodebin_element_added, camera); camera->videosink = gst_element_factory_make ("filesink", "videobin-filesink"); camera->imagebin = gst_element_factory_make ("imagecapturebin", "imagebin"); g_object_set (camera->videosink, "async", FALSE, NULL); /* audio elements */ camera->audio_queue = gst_element_factory_make ("queue", "audio-queue"); camera->audio_convert = gst_element_factory_make ("audioconvert", "audio-convert"); if (camera->video_profile == NULL) { GstEncodingContainerProfile *prof; GstCaps *caps; caps = gst_caps_new_simple ("application/ogg", NULL); prof = gst_encoding_container_profile_new ("ogg", "theora+vorbis+ogg", caps, NULL); gst_caps_unref (caps); caps = gst_caps_new_simple ("video/x-theora", NULL); if (!gst_encoding_container_profile_add_profile (prof, (GstEncodingProfile *) gst_encoding_video_profile_new (caps, NULL, NULL, 1))) { GST_WARNING_OBJECT (camera, "Failed to create encoding profiles"); } gst_caps_unref (caps); caps = gst_caps_new_simple ("audio/x-vorbis", NULL); if (!gst_encoding_container_profile_add_profile (prof, (GstEncodingProfile *) gst_encoding_audio_profile_new (caps, NULL, NULL, 1))) { GST_WARNING_OBJECT (camera, "Failed to create encoding profiles"); } gst_caps_unref (caps); camera->video_profile = (GstEncodingProfile *) prof; camera->profile_switch = TRUE; } camera->videobin_queue = gst_element_factory_make ("queue", "videobin-queue"); camera->imagebin_queue = gst_element_factory_make ("queue", "imagebin-queue"); camera->viewfinderbin_queue = gst_element_factory_make ("queue", "viewfinderbin-queue"); g_object_set (camera->viewfinderbin_queue, "leaky", 2, "silent", TRUE, NULL); g_object_set (camera->imagebin_queue, "max-size-time", (guint64) 0, "silent", TRUE, NULL); g_object_set (camera->videobin_queue, "silent", TRUE, NULL); gst_bin_add_many (GST_BIN_CAST (camera), gst_object_ref (camera->encodebin), gst_object_ref (camera->videosink), gst_object_ref (camera->imagebin), gst_object_ref (camera->videobin_queue), gst_object_ref (camera->imagebin_queue), gst_object_ref (camera->viewfinderbin_queue), NULL); /* Linking can be optimized TODO */ gst_element_link_many (camera->videobin_queue, camera->videobin_capsfilter, NULL); gst_element_link (camera->encodebin, camera->videosink); gst_element_link_many (camera->imagebin_queue, camera->imagebin_capsfilter, camera->imagebin, NULL); gst_element_link_many (camera->viewfinderbin_queue, camera->viewfinderbin_capsfilter, camera->viewfinderbin, NULL); /* * Video can't get into playing as its internal filesink will open * a file for writing and leave it empty if unused. * * Its state is managed using the current mode and the source's * ready-for-capture notify callback. When we are at video mode and * the source's ready-for-capture goes to FALSE it means it is * starting recording, so we should prepare the video bin. */ gst_element_set_locked_state (camera->videosink, TRUE); g_object_set (camera->videosink, "location", camera->video_location, NULL); g_object_set (camera->imagebin, "location", camera->image_location, NULL); } if (camera->profile_switch) { GST_DEBUG_OBJECT (camera, "Switching encodebin's profile"); g_object_set (camera->encodebin, "profile", camera->video_profile, NULL); gst_camera_bin_link_encodebin (camera, camera->videobin_capsfilter, VIDEO_PAD); camera->profile_switch = FALSE; /* used to trigger relinking further down */ profile_switched = TRUE; } /* check if we need to replace the camera src */ if (camera->src) { if (camera->user_src && camera->user_src != camera->src) { if (camera->src_capture_notify_id) g_signal_handler_disconnect (camera->src, camera->src_capture_notify_id); gst_bin_remove (GST_BIN_CAST (camera), camera->src); gst_object_unref (camera->src); camera->src = NULL; } } if (!camera->src) { if (camera->user_src) { camera->src = gst_object_ref (camera->user_src); } else { camera->src = gst_element_factory_make ("wrappercamerabinsrc", "camerasrc"); } new_src = TRUE; } g_assert (camera->src != NULL); g_object_set (camera->src, "mode", camera->mode, NULL); if (camera->src) { if (g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src), "preview-caps")) { g_object_set (camera->src, "post-previews", camera->post_previews, "preview-caps", camera->preview_caps, "preview-filter", camera->preview_filter, NULL); } g_object_set (camera->src, "zoom", camera->zoom, NULL); } if (new_src) { gst_bin_add (GST_BIN_CAST (camera), gst_object_ref (camera->src)); camera->src_capture_notify_id = g_signal_connect (G_OBJECT (camera->src), "notify::ready-for-capture", G_CALLBACK (gst_camera_bin_src_notify_readyforcapture), camera); gst_element_link_pads (camera->src, "vfsrc", camera->viewfinderbin_queue, "sink"); gst_element_link_pads (camera->src, "imgsrc", camera->imagebin_queue, "sink"); gst_element_link_pads (camera->src, "vidsrc", camera->videobin_queue, "sink"); } gst_camera_bin_check_and_replace_filter (camera, &camera->image_filter, camera->user_image_filter, camera->imagebin_queue, camera->imagebin_capsfilter); gst_camera_bin_check_and_replace_filter (camera, &camera->video_filter, camera->user_video_filter, camera->videobin_queue, camera->videobin_capsfilter); gst_camera_bin_check_and_replace_filter (camera, &camera->viewfinder_filter, camera->user_viewfinder_filter, camera->viewfinderbin_queue, camera->viewfinderbin_capsfilter); /* check if we need to replace the camera audio src */ has_audio = gst_camera_bin_video_profile_has_audio (camera); if (camera->audio_src) { if ((camera->user_audio_src && camera->user_audio_src != camera->audio_src) || !has_audio) { gst_bin_remove (GST_BIN_CAST (camera), camera->audio_src); gst_bin_remove (GST_BIN_CAST (camera), camera->audio_queue); gst_bin_remove (GST_BIN_CAST (camera), camera->audio_volume); gst_bin_remove (GST_BIN_CAST (camera), camera->audio_capsfilter); gst_bin_remove (GST_BIN_CAST (camera), camera->audio_convert); gst_object_unref (camera->audio_src); camera->audio_src = NULL; } } if (!camera->audio_src && has_audio) { if (camera->user_audio_src) { camera->audio_src = gst_object_ref (camera->user_audio_src); } else { camera->audio_src = gst_element_factory_make (DEFAULT_AUDIO_SRC, "audiosrc"); } gst_element_set_locked_state (camera->audio_src, TRUE); new_audio_src = TRUE; } if (new_audio_src) { gst_bin_add (GST_BIN_CAST (camera), gst_object_ref (camera->audio_src)); gst_bin_add (GST_BIN_CAST (camera), gst_object_ref (camera->audio_queue)); gst_bin_add (GST_BIN_CAST (camera), gst_object_ref (camera->audio_volume)); gst_bin_add (GST_BIN_CAST (camera), gst_object_ref (camera->audio_capsfilter)); gst_bin_add (GST_BIN_CAST (camera), gst_object_ref (camera->audio_convert)); gst_element_link_many (camera->audio_src, camera->audio_queue, camera->audio_volume, camera->audio_capsfilter, camera->audio_convert, NULL); } if ((profile_switched && has_audio) || new_audio_src) { gst_camera_bin_link_encodebin (camera, camera->audio_convert, AUDIO_PAD); } camera->elements_created = TRUE; return TRUE; } static GstStateChangeReturn gst_camera_bin_change_state (GstElement * element, GstStateChange trans) { GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; GstCameraBin *camera = GST_CAMERA_BIN_CAST (element); switch (trans) { case GST_STATE_CHANGE_NULL_TO_READY: if (!gst_camera_bin_create_elements (camera)) { return GST_STATE_CHANGE_FAILURE; } break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, trans); switch (trans) { case GST_STATE_CHANGE_PAUSED_TO_READY: if (GST_STATE (camera->videosink) >= GST_STATE_PAUSED) gst_element_set_state (camera->videosink, GST_STATE_READY); if (camera->audio_src && GST_STATE (camera->audio_src) >= GST_STATE_READY) gst_element_set_state (camera->audio_src, GST_STATE_READY); gst_tag_setter_reset_tags (GST_TAG_SETTER (camera)); /* explicitly set to READY as they might be outside of the bin */ gst_element_set_state (camera->audio_queue, GST_STATE_READY); gst_element_set_state (camera->audio_volume, GST_STATE_READY); gst_element_set_state (camera->audio_capsfilter, GST_STATE_READY); gst_element_set_state (camera->audio_convert, GST_STATE_READY); break; case GST_STATE_CHANGE_READY_TO_NULL: gst_element_set_state (camera->videosink, GST_STATE_NULL); if (camera->audio_src) gst_element_set_state (camera->audio_src, GST_STATE_NULL); /* explicitly set to NULL as they might be outside of the bin */ gst_element_set_state (camera->audio_queue, GST_STATE_NULL); gst_element_set_state (camera->audio_volume, GST_STATE_NULL); gst_element_set_state (camera->audio_capsfilter, GST_STATE_NULL); gst_element_set_state (camera->audio_convert, GST_STATE_NULL); break; default: break; } return ret; } static void gst_camera_bin_set_location (GstCameraBin * camera, const gchar * location) { GST_DEBUG_OBJECT (camera, "Setting mode %d location to %s", camera->mode, location); if (camera->mode == MODE_IMAGE) { if (camera->imagebin) g_object_set (camera->imagebin, "location", location, NULL); g_free (camera->image_location); camera->image_location = g_strdup (location); } else { g_free (camera->video_location); camera->video_location = g_strdup (location); } } static void gst_camera_bin_set_audio_src (GstCameraBin * camera, GstElement * src) { GST_DEBUG_OBJECT (GST_OBJECT (camera), "Setting audio source %" GST_PTR_FORMAT, src); if (camera->user_audio_src) g_object_unref (camera->user_audio_src); if (src) g_object_ref (src); camera->user_audio_src = src; } static void gst_camera_bin_set_camera_src (GstCameraBin * camera, GstElement * src) { GST_DEBUG_OBJECT (GST_OBJECT (camera), "Setting camera source %" GST_PTR_FORMAT, src); if (camera->user_src) g_object_unref (camera->user_src); if (src) g_object_ref (src); camera->user_src = src; } static void gst_camera_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstCameraBin *camera = GST_CAMERA_BIN_CAST (object); switch (prop_id) { case PROP_MODE: gst_camera_bin_change_mode (camera, g_value_get_enum (value)); break; case PROP_LOCATION: gst_camera_bin_set_location (camera, g_value_get_string (value)); break; case PROP_CAMERA_SRC: gst_camera_bin_set_camera_src (camera, g_value_get_object (value)); break; case PROP_AUDIO_SRC: gst_camera_bin_set_audio_src (camera, g_value_get_object (value)); break; case PROP_MUTE_AUDIO: g_object_set (camera->audio_volume, "mute", g_value_get_boolean (value), NULL); break; case PROP_AUDIO_CAPTURE_CAPS:{ GST_DEBUG_OBJECT (camera, "Setting audio capture caps to %" GST_PTR_FORMAT, gst_value_get_caps (value)); g_object_set (camera->audio_capsfilter, "caps", gst_value_get_caps (value), NULL); } break; case PROP_IMAGE_CAPTURE_CAPS:{ GstPad *pad = NULL; if (camera->src) pad = gst_element_get_static_pad (camera->src, GST_BASE_CAMERA_SRC_IMAGE_PAD_NAME); GST_DEBUG_OBJECT (camera, "Setting image capture caps to %" GST_PTR_FORMAT, gst_value_get_caps (value)); /* set the capsfilter caps and notify the src to renegotiate */ g_object_set (camera->imagebin_capsfilter, "caps", gst_value_get_caps (value), NULL); if (pad) { GST_DEBUG_OBJECT (camera, "Pushing renegotiate on %s", GST_PAD_NAME (pad)); GST_PAD_EVENTFUNC (pad) (pad, gst_camera_bin_new_event_renegotiate ()); gst_object_unref (pad); } } break; case PROP_VIDEO_CAPTURE_CAPS:{ GstPad *pad = NULL; if (camera->src) pad = gst_element_get_static_pad (camera->src, GST_BASE_CAMERA_SRC_VIDEO_PAD_NAME); GST_DEBUG_OBJECT (camera, "Setting video capture caps to %" GST_PTR_FORMAT, gst_value_get_caps (value)); /* set the capsfilter caps and notify the src to renegotiate */ g_object_set (camera->videobin_capsfilter, "caps", gst_value_get_caps (value), NULL); if (pad) { GST_DEBUG_OBJECT (camera, "Pushing renegotiate on %s", GST_PAD_NAME (pad)); GST_PAD_EVENTFUNC (pad) (pad, gst_camera_bin_new_event_renegotiate ()); gst_object_unref (pad); } } break; case PROP_VIEWFINDER_CAPS:{ GstPad *pad = NULL; if (camera->src) pad = gst_element_get_static_pad (camera->src, GST_BASE_CAMERA_SRC_VIEWFINDER_PAD_NAME); GST_DEBUG_OBJECT (camera, "Setting viewfinder capture caps to %" GST_PTR_FORMAT, gst_value_get_caps (value)); /* set the capsfilter caps and notify the src to renegotiate */ g_object_set (camera->viewfinderbin_capsfilter, "caps", gst_value_get_caps (value), NULL); if (pad) { GST_DEBUG_OBJECT (camera, "Pushing renegotiate on %s", GST_PAD_NAME (pad)); GST_PAD_EVENTFUNC (pad) (pad, gst_camera_bin_new_event_renegotiate ()); gst_object_unref (pad); } } break; case PROP_POST_PREVIEWS: camera->post_previews = g_value_get_boolean (value); if (camera->src && g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src), "post-previews")) g_object_set (camera->src, "post-previews", camera->post_previews, NULL); break; case PROP_PREVIEW_CAPS: gst_caps_replace (&camera->preview_caps, (GstCaps *) gst_value_get_caps (value)); if (camera->src && g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src), "preview-caps")) g_object_set (camera->src, "preview-caps", camera->preview_caps, NULL); break; case PROP_VIDEO_ENCODING_PROFILE: if (camera->video_profile) gst_encoding_profile_unref (camera->video_profile); camera->video_profile = (GstEncodingProfile *) gst_value_dup_mini_object (value); camera->profile_switch = TRUE; break; case PROP_IMAGE_FILTER: if (camera->user_image_filter) g_object_unref (camera->user_image_filter); camera->user_image_filter = g_value_dup_object (value); break; case PROP_VIDEO_FILTER: if (camera->user_video_filter) g_object_unref (camera->user_video_filter); camera->user_video_filter = g_value_dup_object (value); break; case PROP_VIEWFINDER_FILTER: if (camera->user_viewfinder_filter) g_object_unref (camera->user_viewfinder_filter); camera->user_viewfinder_filter = g_value_dup_object (value); break; case PROP_PREVIEW_FILTER: if (camera->preview_filter) g_object_unref (camera->preview_filter); camera->preview_filter = g_value_dup_object (value); if (camera->src && g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src), "preview-filter")) g_object_set (camera->src, "preview-filter", camera->preview_filter, NULL); break; case PROP_VIEWFINDER_SINK: g_object_set (camera->viewfinderbin, "video-sink", g_value_get_object (value), NULL); break; case PROP_ZOOM: camera->zoom = g_value_get_float (value); if (camera->src) g_object_set (camera->src, "zoom", camera->zoom, NULL); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_camera_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstCameraBin *camera = GST_CAMERA_BIN_CAST (object); switch (prop_id) { case PROP_MODE: g_value_set_enum (value, camera->mode); break; case PROP_LOCATION: if (camera->mode == MODE_VIDEO) { g_value_set_string (value, camera->video_location); } else { g_value_set_string (value, camera->image_location); } break; case PROP_CAMERA_SRC: g_value_set_object (value, camera->src); break; case PROP_AUDIO_SRC: g_value_set_object (value, camera->audio_src); break; case PROP_MUTE_AUDIO:{ gboolean mute; g_object_get (camera->audio_volume, "mute", &mute, NULL); g_value_set_boolean (value, mute); break; } case PROP_AUDIO_CAPTURE_SUPPORTED_CAPS: case PROP_VIDEO_CAPTURE_SUPPORTED_CAPS: case PROP_VIEWFINDER_SUPPORTED_CAPS: case PROP_IMAGE_CAPTURE_SUPPORTED_CAPS:{ GstPad *pad; GstElement *element; GstCaps *caps; const gchar *padname; if (prop_id == PROP_VIDEO_CAPTURE_SUPPORTED_CAPS) { element = camera->src; padname = GST_BASE_CAMERA_SRC_VIDEO_PAD_NAME; } else if (prop_id == PROP_IMAGE_CAPTURE_SUPPORTED_CAPS) { element = camera->src; padname = GST_BASE_CAMERA_SRC_IMAGE_PAD_NAME; } else if (prop_id == PROP_VIEWFINDER_SUPPORTED_CAPS) { element = camera->src; padname = GST_BASE_CAMERA_SRC_VIEWFINDER_PAD_NAME; } else { element = camera->audio_src; padname = "src"; } if (element) { pad = gst_element_get_static_pad (element, padname); g_assert (pad != NULL); /* TODO not sure if we want get_caps or get_allowed_caps to already * consider the full pipeline scenario and avoid picking a caps that * won't negotiate. Need to take care on the special case of the * pad being unlinked. */ caps = gst_pad_get_caps_reffed (pad); if (caps) { gst_value_set_caps (value, caps); gst_caps_unref (caps); } gst_object_unref (pad); } else { GST_DEBUG_OBJECT (camera, "Source not created, can't get " "supported caps"); } } break; case PROP_AUDIO_CAPTURE_CAPS:{ GstCaps *caps = NULL; g_object_get (camera->audio_capsfilter, "caps", &caps, NULL); gst_value_set_caps (value, caps); gst_caps_unref (caps); } break; case PROP_IMAGE_CAPTURE_CAPS:{ GstCaps *caps = NULL; g_object_get (camera->imagebin_capsfilter, "caps", &caps, NULL); gst_value_set_caps (value, caps); gst_caps_unref (caps); } break; case PROP_VIDEO_CAPTURE_CAPS:{ GstCaps *caps = NULL; g_object_get (camera->videobin_capsfilter, "caps", &caps, NULL); gst_value_set_caps (value, caps); gst_caps_unref (caps); } break; case PROP_VIEWFINDER_CAPS:{ GstCaps *caps = NULL; g_object_get (camera->viewfinderbin_capsfilter, "caps", &caps, NULL); gst_value_set_caps (value, caps); gst_caps_unref (caps); } break; case PROP_POST_PREVIEWS: g_value_set_boolean (value, camera->post_previews); break; case PROP_PREVIEW_CAPS: if (camera->preview_caps) gst_value_set_caps (value, camera->preview_caps); break; case PROP_VIDEO_ENCODING_PROFILE: if (camera->video_profile) { gst_value_set_mini_object (value, (GstMiniObject *) camera->video_profile); } break; case PROP_VIDEO_FILTER: if (camera->video_filter) g_value_set_object (value, camera->video_filter); break; case PROP_IMAGE_FILTER: if (camera->image_filter) g_value_set_object (value, camera->image_filter); break; case PROP_VIEWFINDER_FILTER: if (camera->viewfinder_filter) g_value_set_object (value, camera->viewfinder_filter); break; case PROP_PREVIEW_FILTER: if (camera->preview_filter) g_value_set_object (value, camera->preview_filter); break; case PROP_VIEWFINDER_SINK:{ GstElement *sink; g_object_get (camera->viewfinderbin, "video-sink", &sink, NULL); g_value_take_object (value, sink); break; } case PROP_ZOOM: g_value_set_float (value, camera->zoom); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } gboolean gst_camera_bin_plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (gst_camera_bin_debug, "camerabin2", 0, "CameraBin2"); return gst_element_register (plugin, "camerabin2", GST_RANK_NONE, gst_camera_bin_get_type ()); }