--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_good/gst/camerabin/gstcamerabin.c Wed Sep 01 12:16:41 2010 +0100
@@ -0,0 +1,2769 @@
+/*
+ * GStreamer
+ * Copyright (C) 2008 Nokia Corporation <multimedia@maemo.org>
+ *
+ * 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:gstcamerabin
+ * @short_description: camera capture bin
+ *
+ * <refsect2>
+ * <para>
+ * GstCameraBin is a high-level camera object that encapsulates the gstreamer
+ * internals and provides a task based API for the application. It consists of
+ * three main data paths: view-finder, image capture and video capture.
+ * </para>
+ * <informalfigure>
+ * <mediaobject>
+ * <imageobject><imagedata fileref="camerabin.png"/></imageobject>
+ * <textobject><phrase>CameraBin structure</phrase></textobject>
+ * <caption><para>Structural decomposition of CameraBin object.</para></caption>
+ * </mediaobject>
+ * </informalfigure>
+ * </refsect2>
+ * <refsect2>
+ * <title>Example launch line</title>
+ * <para>
+ * <programlisting>
+ * gst-launch -v -m camerabin filename=test.jpeg
+ * </programlisting>
+ * </para>
+ * </refsect2>
+ * <refsect2>
+ * <title>Image capture</title>
+ * <para>
+ * Taking still images is initiated with the #GstCameraBin::user-start action
+ * signal. Once the image has captured, #GstCameraBin::img-done signal is fired.
+ * It allows to decide wheter to take another picture (burst capture, bracketing
+ * shot) or stop capturing. The last captured image is shown
+ * until one switches back to view finder using #GstCameraBin::user-stop action
+ * signal.
+ * </para>
+ * <para>
+ * Available resolutions can be taken from the #GstCameraBin:inputcaps property.
+ * Image capture resolution can be set with #GstCameraBin::user-image-res
+ * action signal.
+ * </para>
+ * </refsect2>
+ * <refsect2>
+ * <title>Video capture</title>
+ * <para>
+ * Video capture is started with the #GstCameraBin::user-start action signal too.
+ * In addition to image capture one can use #GstCameraBin::user-pause to
+ * pause recording and #GstCameraBin::user-stop to end recording.
+ * </para>
+ * <para>
+ * Available resolutions and fps can be taken from the #GstCameraBin:inputcaps
+ * property. #GstCameraBin::user-res-fps action signal can be used to set frame
+ * rate and resolution for the video recording and view finder as well.
+ * </para>
+ * </refsect2>
+ * <refsect2>
+ * <title>Photography interface</title>
+ * <para>
+ * GstCameraBin implements gst photography interface, which can be used to set
+ * and get different settings related to digital imaging. Since currently many
+ * of these settings require low-level support the photography interface support
+ * is dependent on video src element. In practice photography interface settings
+ * cannot be used successfully until in PAUSED state when the video src has
+ * opened the video device.
+ * </para>
+ * </refsect2>
+ * <refsect2>
+ * <title>States</title>
+ * <para>
+ * Elements within GstCameraBin are created and destroyed when switching
+ * between NULL and READY states. Therefore element properties should be set
+ * in NULL state. User set elements are not unreffed until GstCameraBin is
+ * unreffed or replaced by a new user set element. Initially only elements needed
+ * for view finder mode are created to speed up startup. Image bin and video bin
+ * elements are created when setting the mode or starting capture.
+ * </para>
+ * </refsect2>
+ * <refsect2>
+ * <note>
+ * <para>
+ * Since the muxers tested so far have problems with discontinous buffers, QoS
+ * has been disabled, and then in order to record video, you MUST ensure that
+ * there is enough CPU to encode the video. Thus choose smart resolution and
+ * frames per second values. It is also highly recommended to avoid color
+ * conversions; make sure all the elements involved work with the same colorspace
+ * (i.e. rgb or yuv i420 or whatelse).
+ * </para>
+ * </note>
+ * </refsect2>
+ */
+
+/*
+ * The pipeline in the camerabin is
+ *
+ * "image bin"
+ * videosrc ! crop ! scale ! out-sel <------> in-sel ! scale ! ffmpegcsp ! vfsink
+ * "video bin"
+ *
+ * it is possible to have 'ffmpegcolorspace' and 'capsfilter' just after
+ * v4l2camsrc
+ *
+ * The properties of elements are:
+ *
+ * vfsink - "sync", FALSE, "qos", FALSE
+ * output-selector - "resend-latest", FALSE
+ * input-selector - "select-all", TRUE
+ */
+
+/*
+ * includes
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+
+#include <string.h>
+#include <stdlib.h>
+
+#include <gst/gst.h>
+/* FIXME: include #include <gst/gst-i18n-plugin.h> and use _(" ") */
+
+#ifndef __SYMBIAN32__
+#include <gst/gst-i18n-plugin.h>
+#else
+#include <gst/gst-i18n-plugin.h>
+#endif
+
+#ifdef __SYMBIAN32__
+#include <gst/gstinfo.h>
+#endif
+
+
+
+
+#include "gstcamerabin.h"
+#include "gstcamerabinxoverlay.h"
+#include "gstcamerabincolorbalance.h"
+#include "gstcamerabinphotography.h"
+
+#include "camerabingeneral.h"
+
+#include "gstcamerabin-marshal.h"
+
+#ifdef __SYMBIAN32__
+#include <glib_global.h>
+#endif
+/*
+ * enum and types
+ */
+
+enum
+{
+ /* action signals */
+ USER_START_SIGNAL,
+ USER_STOP_SIGNAL,
+ USER_PAUSE_SIGNAL,
+ USER_RES_FPS_SIGNAL,
+ USER_IMAGE_RES_SIGNAL,
+ /* emit signals */
+ IMG_DONE_SIGNAL,
+ LAST_SIGNAL
+};
+
+enum
+{
+ ARG_0,
+ ARG_FILENAME,
+ ARG_MODE,
+ ARG_MUTE,
+ ARG_ZOOM,
+ ARG_IMAGE_POST,
+ ARG_IMAGE_ENC,
+ ARG_VIDEO_POST,
+ ARG_VIDEO_ENC,
+ ARG_AUDIO_ENC,
+ ARG_VIDEO_MUX,
+ ARG_VF_SINK,
+ ARG_VIDEO_SRC,
+ ARG_AUDIO_SRC,
+ ARG_INPUT_CAPS,
+ ARG_FILTER_CAPS
+};
+
+/*
+ * defines and static global vars
+ */
+
+static guint camerabin_signals[LAST_SIGNAL];
+
+#define GST_TYPE_CAMERABIN_MODE (gst_camerabin_mode_get_type ())
+
+/* default and range values for args */
+
+#define DEFAULT_MODE MODE_IMAGE
+#define DEFAULT_ZOOM 100
+#define DEFAULT_WIDTH 640
+#define DEFAULT_HEIGHT 480
+#define DEFAULT_CAPTURE_WIDTH 800
+#define DEFAULT_CAPTURE_HEIGHT 600
+#define DEFAULT_FPS_N 0 /* makes it use the default */
+#define DEFAULT_FPS_D 1
+#define CAMERABIN_DEFAULT_VF_CAPS "video/x-raw-yuv,format=(fourcc)I420"
+/* Using "bilinear" as default zoom method */
+#define CAMERABIN_DEFAULT_ZOOM_METHOD 1
+
+#define MIN_ZOOM 100
+#define MAX_ZOOM 1000
+#define ZOOM_1X MIN_ZOOM
+
+#define DEFAULT_V4L2CAMSRC_DRIVER_NAME "omap3cam"
+
+/* internal element names */
+
+#define USE_COLOR_CONVERTER 1
+
+/* FIXME: Make sure this can work with autovideosrc and use that. */
+#define DEFAULT_SRC_VID_SRC "v4l2src"
+
+#define DEFAULT_VIEW_SINK "autovideosink"
+
+/*
+ * static helper functions declaration
+ */
+
+static void camerabin_setup_src_elements (GstCameraBin * camera);
+
+static gboolean camerabin_create_src_elements (GstCameraBin * camera);
+
+static void camerabin_setup_view_elements (GstCameraBin * camera);
+
+static gboolean camerabin_create_view_elements (GstCameraBin * camera);
+
+static gboolean camerabin_create_elements (GstCameraBin * camera);
+
+static void camerabin_destroy_elements (GstCameraBin * camera);
+
+static void camerabin_dispose_elements (GstCameraBin * camera);
+
+static void gst_camerabin_change_mode (GstCameraBin * camera, gint mode);
+
+static void
+gst_camerabin_change_filename (GstCameraBin * camera, const gchar * name);
+
+static void gst_camerabin_setup_zoom (GstCameraBin * camera);
+
+static GstCaps *gst_camerabin_get_allowed_input_caps (GstCameraBin * camera);
+
+static void gst_camerabin_rewrite_tags (GstCameraBin * camera);
+
+static void
+gst_camerabin_set_capsfilter_caps (GstCameraBin * camera, GstCaps * new_caps);
+
+static void gst_camerabin_start_image_capture (GstCameraBin * camera);
+
+static void gst_camerabin_start_video_recording (GstCameraBin * camera);
+
+static gboolean
+gst_camerabin_have_img_buffer (GstPad * pad, GstBuffer * buffer,
+ gpointer u_data);
+static gboolean
+gst_camerabin_have_vid_buffer (GstPad * pad, GstBuffer * buffer,
+ gpointer u_data);
+
+static void gst_camerabin_reset_to_view_finder (GstCameraBin * camera);
+
+static void gst_camerabin_do_stop (GstCameraBin * camera);
+
+static void
+gst_camerabin_set_allowed_framerate (GstCameraBin * camera,
+ GstCaps * filter_caps);
+
+/*
+ * GObject callback functions declaration
+ */
+
+static void gst_camerabin_base_init (gpointer gclass);
+
+static void gst_camerabin_class_init (GstCameraBinClass * klass);
+
+static void
+gst_camerabin_init (GstCameraBin * camera, GstCameraBinClass * gclass);
+
+static void gst_camerabin_dispose (GObject * object);
+
+static void gst_camerabin_finalize (GObject * object);
+
+static void gst_camerabin_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+
+static void gst_camerabin_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static const GValue *gst_camerabin_find_better_framerate (GstCameraBin * camera,
+ GstStructure * st, const GValue * orig_framerate);
+/*
+ * GstElement function declarations
+ */
+
+static GstStateChangeReturn
+gst_camerabin_change_state (GstElement * element, GstStateChange transition);
+
+
+/*
+ * GstBin function declarations
+ */
+static void
+gst_camerabin_handle_message_func (GstBin * bin, GstMessage * message);
+
+
+/*
+ * Action signal function declarations
+ */
+
+static void gst_camerabin_user_start (GstCameraBin * camera);
+
+static void gst_camerabin_user_stop (GstCameraBin * camera);
+
+static void gst_camerabin_user_pause (GstCameraBin * camera);
+
+static void
+gst_camerabin_user_res_fps (GstCameraBin * camera, gint width, gint height,
+ gint fps_n, gint fps_d);
+
+static void
+gst_camerabin_user_image_res (GstCameraBin * camera, gint width, gint height);
+
+
+/*
+ * GST BOILERPLATE and GObject types
+ */
+
+static GType
+gst_camerabin_mode_get_type (void)
+{
+ static GType gtype = 0;
+
+ if (gtype == 0) {
+ static const GEnumValue values[] = {
+ {MODE_IMAGE, "Still image capture (default)", "mode-image"},
+ {MODE_VIDEO, "Video recording", "mode-video"},
+ {0, NULL, NULL}
+ };
+
+ gtype = g_enum_register_static ("GstCameraBinMode", values);
+ }
+ return gtype;
+}
+
+static gboolean
+gst_camerabin_iface_supported (GstImplementsInterface * iface, GType iface_type)
+{
+ GstCameraBin *camera = GST_CAMERABIN (iface);
+
+ if (iface_type == GST_TYPE_X_OVERLAY) {
+ if (camera->view_sink) {
+ return GST_IS_X_OVERLAY (camera->view_sink);
+ }
+ } else if (iface_type == GST_TYPE_COLOR_BALANCE) {
+ if (camera->src_vid_src) {
+ return GST_IS_COLOR_BALANCE (camera->src_vid_src);
+ }
+ } else if (iface_type == GST_TYPE_TAG_SETTER) {
+ /* Note: Tag setter elements aren't
+ present when image and video bin in NULL */
+ GstElement *setter;
+ setter = gst_bin_get_by_interface (GST_BIN (camera), iface_type);
+ if (setter) {
+ gst_object_unref (setter);
+ return TRUE;
+ } else {
+ return FALSE;
+ }
+ } else if (iface_type == GST_TYPE_PHOTOGRAPHY) {
+ if (camera->src_vid_src) {
+ return GST_IS_PHOTOGRAPHY (camera->src_vid_src);
+ }
+ }
+
+ return FALSE;
+}
+
+static void
+gst_camerabin_interface_init (GstImplementsInterfaceClass * klass)
+{
+ /*
+ * default virtual functions
+ */
+ klass->supported = gst_camerabin_iface_supported;
+}
+
+static void
+camerabin_init_interfaces (GType type)
+{
+
+ static const GInterfaceInfo camerabin_info = {
+ (GInterfaceInitFunc) gst_camerabin_interface_init,
+ NULL,
+ NULL,
+ };
+
+ static const GInterfaceInfo camerabin_xoverlay_info = {
+ (GInterfaceInitFunc) gst_camerabin_xoverlay_init,
+ NULL,
+ NULL,
+ };
+
+ static const GInterfaceInfo camerabin_color_balance_info = {
+ (GInterfaceInitFunc) gst_camerabin_color_balance_init,
+ NULL,
+ NULL,
+ };
+
+ static const GInterfaceInfo camerabin_tagsetter_info = {
+ NULL,
+ NULL,
+ NULL,
+ };
+ static const GInterfaceInfo camerabin_photography_info = {
+ (GInterfaceInitFunc) gst_camerabin_photography_init,
+ NULL,
+ NULL,
+ };
+
+ g_type_add_interface_static (type,
+ GST_TYPE_IMPLEMENTS_INTERFACE, &camerabin_info);
+
+ g_type_add_interface_static (type, GST_TYPE_X_OVERLAY,
+ &camerabin_xoverlay_info);
+
+ g_type_add_interface_static (type, GST_TYPE_COLOR_BALANCE,
+ &camerabin_color_balance_info);
+
+ g_type_add_interface_static (type, GST_TYPE_TAG_SETTER,
+ &camerabin_tagsetter_info);
+
+ g_type_add_interface_static (type, GST_TYPE_PHOTOGRAPHY,
+ &camerabin_photography_info);
+}
+
+GST_BOILERPLATE_FULL (GstCameraBin, gst_camerabin, GstPipeline,
+ GST_TYPE_PIPELINE, camerabin_init_interfaces);
+
+/*
+ * static helper functions implementation
+ */
+
+/*
+ * camerabin_setup_src_elements:
+ * @camera: camerabin object
+ *
+ * This function updates camerabin capsfilters according
+ * to fps, resolution and zoom that have been configured
+ * to camerabin.
+ */
+static void
+camerabin_setup_src_elements (GstCameraBin * camera)
+{
+ GstStructure *st;
+ GstCaps *new_caps;
+ gboolean detect_framerate = FALSE;
+
+ if (!camera->view_finder_caps) {
+ st = gst_structure_from_string (CAMERABIN_DEFAULT_VF_CAPS, NULL);
+ } else {
+ st = gst_structure_copy (gst_caps_get_structure (camera->view_finder_caps,
+ 0));
+ }
+
+ if (camera->width > 0 && camera->height > 0) {
+ gst_structure_set (st,
+ "width", G_TYPE_INT, camera->width,
+ "height", G_TYPE_INT, camera->height, NULL);
+ }
+
+ if (camera->fps_n > 0 && camera->fps_d > 0) {
+ if (camera->night_mode) {
+ GST_WARNING_OBJECT (camera,
+ "night mode, lowest allowed fps will be forced");
+ camera->pre_night_fps_n = camera->fps_n;
+ camera->pre_night_fps_d = camera->fps_d;
+ detect_framerate = TRUE;
+ } else {
+ gst_structure_set (st,
+ "framerate", GST_TYPE_FRACTION, camera->fps_n, camera->fps_d, NULL);
+ new_caps = gst_caps_new_full (st, NULL);
+ }
+ } else {
+ GST_DEBUG_OBJECT (camera, "no framerate specified");
+ detect_framerate = TRUE;
+ }
+
+ if (detect_framerate) {
+ GST_DEBUG_OBJECT (camera, "detecting allowed framerate");
+ /* Remove old framerate if any */
+ if (gst_structure_has_field (st, "framerate")) {
+ gst_structure_remove_field (st, "framerate");
+ }
+ new_caps = gst_caps_new_full (st, NULL);
+
+ /* Set allowed framerate for the resolution */
+ gst_camerabin_set_allowed_framerate (camera, new_caps);
+ }
+
+ /* Set default zoom method */
+ g_object_set (camera->src_zoom_scale, "method",
+ CAMERABIN_DEFAULT_ZOOM_METHOD, NULL);
+
+ gst_caps_replace (&camera->view_finder_caps, new_caps);
+
+ /* Set caps for view finder mode */
+ gst_camerabin_set_capsfilter_caps (camera, camera->view_finder_caps);
+}
+
+/*
+ * camerabin_create_src_elements:
+ * @camera: camerabin object
+ *
+ * This function creates and links upstream side elements for camerabin.
+ * videosrc ! cspconv ! capsfilter ! crop ! scale ! capsfilter ! out-sel !
+ *
+ * Returns: TRUE, if elements were successfully created, FALSE otherwise
+ */
+static gboolean
+camerabin_create_src_elements (GstCameraBin * camera)
+{
+ gboolean ret = FALSE;
+ GstBin *cbin = GST_BIN (camera);
+ gchar *driver_name = NULL;
+
+ if (camera->user_vid_src) {
+ camera->src_vid_src = camera->user_vid_src;
+
+ if (!gst_camerabin_add_element (cbin, camera->src_vid_src)) {
+ camera->src_vid_src = NULL;
+ goto done;
+ }
+ } else if (!(camera->src_vid_src =
+ gst_camerabin_create_and_add_element (cbin, DEFAULT_SRC_VID_SRC)))
+ goto done;
+#ifdef USE_COLOR_CONVERTER
+ if (!gst_camerabin_create_and_add_element (cbin, "ffmpegcolorspace"))
+ goto done;
+#endif
+ if (!(camera->src_filter =
+ gst_camerabin_create_and_add_element (cbin, "capsfilter")))
+ goto done;
+ if (!(camera->src_zoom_crop =
+ gst_camerabin_create_and_add_element (cbin, "videocrop")))
+ goto done;
+ if (!(camera->src_zoom_scale =
+ gst_camerabin_create_and_add_element (cbin, "videoscale")))
+ goto done;
+ if (!(camera->src_zoom_filter =
+ gst_camerabin_create_and_add_element (cbin, "capsfilter")))
+ goto done;
+ if (!(camera->src_out_sel =
+ gst_camerabin_create_and_add_element (cbin, "output-selector")))
+ goto done;
+
+ camera->srcpad_zoom_filter =
+ gst_element_get_static_pad (camera->src_zoom_filter, "src");
+
+ /* Set default "driver-name" for v4l2camsrc if not set */
+ if (g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src_vid_src),
+ "driver-name")) {
+ g_object_get (G_OBJECT (camera->src_vid_src), "driver-name",
+ &driver_name, NULL);
+ if (!driver_name) {
+ g_object_set (G_OBJECT (camera->src_vid_src), "driver-name",
+ DEFAULT_V4L2CAMSRC_DRIVER_NAME, NULL);
+ }
+ }
+
+ ret = TRUE;
+done:
+ return ret;
+}
+
+/*
+ * camerabin_setup_view_elements:
+ * @camera: camerabin object
+ *
+ * This function configures properties for view finder sink element.
+ */
+static void
+camerabin_setup_view_elements (GstCameraBin * camera)
+{
+ GST_DEBUG_OBJECT (camera, "setting view finder properties");
+ g_object_set (G_OBJECT (camera->view_in_sel), "select-all", TRUE, NULL);
+ /* Set properties for view finder sink */
+ /* Find the actual sink if using bin like autovideosink */
+ if (GST_IS_BIN (camera->view_sink)) {
+ GList *child = NULL, *children = GST_BIN_CHILDREN (camera->view_sink);
+ for (child = children; child != NULL; child = g_list_next (children)) {
+ GObject *ch = G_OBJECT (child->data);
+ if (g_object_class_find_property (G_OBJECT_GET_CLASS (ch), "sync")) {
+ g_object_set (G_OBJECT (ch), "sync", FALSE, "qos", FALSE, "async",
+ FALSE, NULL);
+ }
+ }
+ } else {
+ g_object_set (G_OBJECT (camera->view_sink), "sync", FALSE, "qos", FALSE,
+ "async", FALSE, NULL);
+ }
+}
+
+/*
+ * camerabin_create_view_elements:
+ * @camera: camerabin object
+ *
+ * This function creates and links downstream side elements for camerabin.
+ * ! scale ! cspconv ! view finder sink
+ *
+ * Returns: TRUE, if elements were successfully created, FALSE otherwise
+ */
+static gboolean
+camerabin_create_view_elements (GstCameraBin * camera)
+{
+ const GList *pads;
+
+ if (!(camera->view_in_sel =
+ gst_camerabin_create_and_add_element (GST_BIN (camera),
+ "input-selector"))) {
+ goto error;
+ }
+
+ /* Look for recently added input selector sink pad, we need to release it later */
+ pads = GST_ELEMENT_PADS (camera->view_in_sel);
+ while (pads != NULL
+ && (GST_PAD_DIRECTION (GST_PAD (pads->data)) != GST_PAD_SINK)) {
+ pads = g_list_next (pads);
+ }
+ camera->pad_view_img = GST_PAD (pads->data);
+
+ if (!(camera->view_scale =
+ gst_camerabin_create_and_add_element (GST_BIN (camera),
+ "videoscale"))) {
+ goto error;
+ }
+#ifdef USE_COLOR_CONVERTER
+ if (!gst_camerabin_create_and_add_element (GST_BIN (camera),
+ "ffmpegcolorspace")) {
+ goto error;
+ }
+#endif
+ if (camera->user_vf_sink) {
+ camera->view_sink = camera->user_vf_sink;
+ if (!gst_camerabin_add_element (GST_BIN (camera), camera->view_sink)) {
+ goto error;
+ }
+ } else if (!(camera->view_sink =
+ gst_camerabin_create_and_add_element (GST_BIN (camera),
+ DEFAULT_VIEW_SINK))) {
+ goto error;
+ }
+
+ return TRUE;
+error:
+ return FALSE;
+}
+
+/*
+ * camerabin_create_elements:
+ * @camera: camerabin object
+ *
+ * This function creates and links all elements for camerabin,
+ *
+ * Returns: TRUE, if elements were successfully created, FALSE otherwise
+ */
+static gboolean
+camerabin_create_elements (GstCameraBin * camera)
+{
+ gboolean ret = FALSE;
+ GstPadLinkReturn link_ret = GST_PAD_LINK_REFUSED;
+ GstPad *unconnected_pad;
+
+ GST_LOG_OBJECT (camera, "creating elems");
+
+ /* Create "src" elements */
+ if (!camerabin_create_src_elements (camera)) {
+ goto done;
+ }
+
+ /* Add image bin */
+ camera->pad_src_img =
+ gst_element_get_request_pad (camera->src_out_sel, "src%d");
+ if (!gst_camerabin_add_element (GST_BIN (camera), camera->imgbin)) {
+ goto done;
+ }
+ gst_pad_add_buffer_probe (camera->pad_src_img,
+ G_CALLBACK (gst_camerabin_have_img_buffer), camera);
+
+ /* Create view finder elements, this also links it to image bin */
+ if (!camerabin_create_view_elements (camera)) {
+ GST_WARNING_OBJECT (camera, "creating view failed");
+ goto done;
+ }
+
+ /* Link output selector ! view_finder */
+ camera->pad_src_view =
+ gst_element_get_request_pad (camera->src_out_sel, "src%d");
+ camera->pad_view_src =
+ gst_element_get_request_pad (camera->view_in_sel, "sink%d");
+ link_ret = gst_pad_link (camera->pad_src_view, camera->pad_view_src);
+ if (GST_PAD_LINK_FAILED (link_ret)) {
+ GST_ELEMENT_ERROR (camera, CORE, NEGOTIATION,
+ ("linking view finder failed"), (NULL));
+ goto done;
+ }
+
+ /* Set view finder active as default */
+ g_object_set (G_OBJECT (camera->src_out_sel), "active-pad",
+ camera->pad_src_view, NULL);
+
+ /* Add video bin */
+ camera->pad_src_vid =
+ gst_element_get_request_pad (camera->src_out_sel, "src%d");
+ if (!gst_camerabin_add_element (GST_BIN (camera), camera->vidbin)) {
+ goto done;
+ }
+ gst_pad_add_buffer_probe (camera->pad_src_vid,
+ G_CALLBACK (gst_camerabin_have_vid_buffer), camera);
+
+ /* Link video bin ! view finder */
+ // unconnected_pad = gst_bin_find_unlinked_pad (GST_BIN (camera), GST_PAD_SRC);
+ unconnected_pad = gst_bin_find_unconnected_pad (GST_BIN (camera), GST_PAD_SRC);
+ camera->pad_view_vid =
+ gst_element_get_request_pad (camera->view_in_sel, "sink%d");
+ link_ret = gst_pad_link (unconnected_pad, camera->pad_view_vid);
+ gst_object_unref (unconnected_pad);
+ if (GST_PAD_LINK_FAILED (link_ret)) {
+ GST_ELEMENT_ERROR (camera, CORE, NEGOTIATION, (NULL),
+ ("linking video bin and view finder failed"));
+ goto done;
+ }
+
+ ret = TRUE;
+
+done:
+
+ if (FALSE == ret)
+ camerabin_destroy_elements (camera);
+
+ return ret;
+}
+
+/*
+ * camerabin_destroy_elements:
+ * @camera: camerabin object
+ *
+ * This function removes all elements from camerabin.
+ */
+static void
+camerabin_destroy_elements (GstCameraBin * camera)
+{
+ GST_DEBUG_OBJECT (camera, "destroying elements");
+
+ /* Release request pads */
+ if (camera->pad_view_vid) {
+ gst_element_release_request_pad (camera->view_in_sel, camera->pad_view_vid);
+ camera->pad_view_vid = NULL;
+ }
+ if (camera->pad_src_vid) {
+ gst_element_release_request_pad (camera->src_out_sel, camera->pad_src_vid);
+ camera->pad_src_vid = NULL;
+ }
+ if (camera->pad_view_img) {
+ gst_element_release_request_pad (camera->view_in_sel, camera->pad_view_img);
+ camera->pad_view_img = NULL;
+ }
+ if (camera->pad_src_img) {
+ gst_element_release_request_pad (camera->src_out_sel, camera->pad_src_img);
+ camera->pad_src_img = NULL;
+ }
+ if (camera->pad_view_src) {
+ gst_element_release_request_pad (camera->view_in_sel, camera->pad_view_src);
+ camera->pad_view_src = NULL;
+ }
+ if (camera->pad_src_view) {
+ gst_element_release_request_pad (camera->src_out_sel, camera->pad_src_view);
+ camera->pad_src_view = NULL;
+ }
+
+ camera->view_sink = NULL;
+ camera->view_scale = NULL;
+ camera->view_in_sel = NULL;
+
+ camera->src_out_sel = NULL;
+ camera->src_filter = NULL;
+ camera->src_zoom_crop = NULL;
+ camera->src_zoom_scale = NULL;
+ camera->src_zoom_filter = NULL;
+ camera->src_vid_src = NULL;
+
+ camera->active_bin = NULL;
+
+ /* Remove elements */
+ gst_camerabin_remove_elements_from_bin (GST_BIN (camera));
+}
+
+/*
+ * camerabin_dispose_elements:
+ * @camera: camerabin object
+ *
+ * This function releases all allocated camerabin resources.
+ */
+static void
+camerabin_dispose_elements (GstCameraBin * camera)
+{
+ if (camera->capture_mutex) {
+ g_mutex_free (camera->capture_mutex);
+ camera->capture_mutex = NULL;
+ }
+ if (camera->cond) {
+ g_cond_free (camera->cond);
+ camera->cond = NULL;
+ }
+ if (camera->filename) {
+ g_string_free (camera->filename, TRUE);
+ camera->filename = NULL;
+ }
+ /* Unref user set elements */
+ if (camera->user_vf_sink) {
+ gst_object_unref (camera->user_vf_sink);
+ camera->user_vf_sink = NULL;
+ }
+ if (camera->user_vid_src) {
+ gst_object_unref (camera->user_vid_src);
+ camera->user_vid_src = NULL;
+ }
+
+ if (camera->image_capture_caps) {
+ gst_caps_unref (camera->image_capture_caps);
+ camera->image_capture_caps = NULL;
+ }
+
+ if (camera->view_finder_caps) {
+ gst_caps_unref (camera->view_finder_caps);
+ camera->view_finder_caps = NULL;
+ }
+
+ if (camera->allowed_caps) {
+ gst_caps_unref (camera->allowed_caps);
+ camera->allowed_caps = NULL;
+ }
+}
+
+/*
+ * gst_camerabin_image_capture_continue:
+ * @camera: camerabin object
+ * @filename: new filename set by user
+ * @cont: TRUE to continue image capture, FALSE otherwise
+ *
+ * Check if user wants to continue image capturing by using g_signal.
+ */
+static void
+gst_camerabin_image_capture_continue (GstCameraBin * camera, GString * filename,
+ gboolean * cont)
+{
+ GST_DEBUG_OBJECT (camera, "emitting img_done signal, filename: %s",
+ filename->str);
+ g_signal_emit (G_OBJECT (camera), camerabin_signals[IMG_DONE_SIGNAL], 0,
+ filename, cont);
+
+ GST_DEBUG_OBJECT (camera, "emitted img_done, new filename:%s, continue:%d",
+ filename->str, *cont);
+}
+
+/*
+ * gst_camerabin_change_mode:
+ * @camera: camerabin object
+ * @mode: image or video mode
+ *
+ * Change camerabin mode between image and video capture.
+ * Changing mode will stop ongoing capture.
+ */
+static void
+gst_camerabin_change_mode (GstCameraBin * camera, gint mode)
+{
+ if (camera->mode != mode || !camera->active_bin) {
+ GST_DEBUG_OBJECT (camera, "setting mode: %d", mode);
+ /* Interrupt ongoing capture */
+ gst_camerabin_do_stop (camera);
+ camera->mode = mode;
+ if (camera->active_bin) {
+ gst_element_set_state (camera->active_bin, GST_STATE_NULL);
+ }
+ if (camera->mode == MODE_IMAGE) {
+ camera->active_bin = camera->imgbin;
+ } else if (camera->mode == MODE_VIDEO) {
+ camera->active_bin = camera->vidbin;
+ }
+ gst_camerabin_reset_to_view_finder (camera);
+ }
+}
+
+/*
+ * gst_camerabin_change_filename:
+ * @camera: camerabin object
+ * @name: new filename for capture
+ *
+ * Change filename for image or video capture.
+ * Changing filename will stop ongoing capture.
+ */
+static void
+gst_camerabin_change_filename (GstCameraBin * camera, const gchar * name)
+{
+ if (0 != strcmp (camera->filename->str, name)) {
+ GST_DEBUG_OBJECT (camera, "changing filename from %s to %s",
+ camera->filename->str, name);
+ /* Interrupt ongoing capture */
+ gst_camerabin_do_stop (camera);
+ gst_camerabin_reset_to_view_finder (camera);
+
+ if (camera->active_bin) {
+ g_object_set (G_OBJECT (camera->active_bin), "filename", name, NULL);
+ }
+
+ g_string_assign (camera->filename, name);
+ }
+}
+
+/*
+ * gst_camerabin_setup_zoom:
+ * @camera: camerabin object
+ *
+ * Apply zoom configured to camerabin to capture.
+ */
+static void
+gst_camerabin_setup_zoom (GstCameraBin * camera)
+{
+ gint zoom;
+ gboolean done = FALSE;
+
+ g_return_if_fail (camera != NULL);
+ g_return_if_fail (camera->src_zoom_crop != NULL);
+
+ zoom = g_atomic_int_get (&camera->zoom);
+
+ g_return_if_fail (zoom);
+
+ if (GST_IS_ELEMENT (camera->src_vid_src) &&
+ gst_element_implements_interface (camera->src_vid_src,
+ GST_TYPE_PHOTOGRAPHY)) {
+ /* Try setting (hardware) zoom using photography interface */
+ GstPhotography *photo;
+ GstPhotoCaps pcaps;
+
+ photo = GST_PHOTOGRAPHY (camera->src_vid_src);
+ pcaps = gst_photography_get_capabilities (photo);
+
+ if (pcaps & GST_PHOTOGRAPHY_CAPS_ZOOM) {
+ done = gst_photography_set_zoom (photo, (gfloat) zoom / 100.0);
+ }
+ }
+
+ if (!done) {
+ /* Update capsfilters to apply the (software) zoom */
+ gint w2_crop = 0;
+ gint h2_crop = 0;
+ GstPad *pad_zoom_sink = NULL;
+
+ GST_INFO_OBJECT (camera, "zoom: %d, orig size: %dx%d", zoom,
+ camera->width, camera->height);
+
+ if (zoom != ZOOM_1X) {
+ w2_crop = (camera->width - (camera->width * ZOOM_1X / zoom)) / 2;
+ h2_crop = (camera->height - (camera->height * ZOOM_1X / zoom)) / 2;
+ }
+
+ pad_zoom_sink = gst_element_get_static_pad (camera->src_zoom_crop, "sink");
+
+ GST_INFO_OBJECT (camera,
+ "sw cropping: left:%d, right:%d, top:%d, bottom:%d", w2_crop, w2_crop,
+ h2_crop, h2_crop);
+
+ GST_PAD_STREAM_LOCK (pad_zoom_sink);
+ g_object_set (camera->src_zoom_crop, "left", w2_crop, "right", w2_crop,
+ "top", h2_crop, "bottom", h2_crop, NULL);
+
+ GST_PAD_STREAM_UNLOCK (pad_zoom_sink);
+ gst_object_unref (pad_zoom_sink);
+ }
+ GST_LOG_OBJECT (camera, "zoom set");
+}
+
+/*
+ * gst_camerabin_get_allowed_input_caps:
+ * @camera: camerabin object
+ *
+ * Retrieve caps from videosrc describing formats it supports
+ *
+ * Returns: caps object from videosrc
+ */
+static GstCaps *
+gst_camerabin_get_allowed_input_caps (GstCameraBin * camera)
+{
+ GstCaps *caps = NULL;
+ GstPad *pad = NULL, *peer_pad = NULL;
+ GstState state;
+ gboolean temp_videosrc_pause = FALSE;
+ GstElement *videosrc;
+
+ g_return_val_if_fail (camera != NULL, NULL);
+
+ videosrc = camera->src_vid_src ? camera->src_vid_src : camera->user_vid_src;
+
+ if (!videosrc) {
+ GST_WARNING_OBJECT (camera, "no videosrc, can't get allowed caps");
+ goto failed;
+ }
+
+ if (camera->allowed_caps) {
+ GST_DEBUG_OBJECT (camera, "returning cached caps");
+ goto done;
+ }
+
+ pad = gst_element_get_static_pad (videosrc, "src");
+
+ if (!pad) {
+ GST_WARNING_OBJECT (camera, "no srcpad in videosrc");
+ goto failed;
+ }
+
+ state = GST_STATE (videosrc);
+
+ /* Make this function work also in READY and NULL state */
+ if (state == GST_STATE_READY || state == GST_STATE_NULL) {
+ GST_DEBUG_OBJECT (camera, "setting videosrc to paused temporarily");
+ temp_videosrc_pause = TRUE;
+ peer_pad = gst_pad_get_peer (pad);
+ if (peer_pad) {
+ gst_pad_unlink (pad, peer_pad);
+ }
+ /* Set videosrc to PAUSED to open video device */
+ gst_element_set_locked_state (videosrc, TRUE);
+ gst_element_set_state (videosrc, GST_STATE_PAUSED);
+ }
+
+ camera->allowed_caps = gst_pad_get_caps (pad);
+
+ /* Restore state and re-link if necessary */
+ if (temp_videosrc_pause) {
+ GST_DEBUG_OBJECT (camera, "restoring videosrc state %d", state);
+ /* Reset videosrc to NULL state, some drivers seem to need this */
+ gst_element_set_state (videosrc, GST_STATE_NULL);
+ gst_element_set_state (videosrc, state);
+ if (peer_pad) {
+ gst_pad_link (pad, peer_pad);
+ gst_object_unref (peer_pad);
+ }
+ gst_element_set_locked_state (videosrc, FALSE);
+ }
+
+ gst_object_unref (pad);
+
+done:
+ if (camera->allowed_caps) {
+ caps = gst_caps_copy (camera->allowed_caps);
+ }
+failed:
+ GST_INFO_OBJECT (camera, "allowed caps:%" GST_PTR_FORMAT, caps);
+ return caps;
+}
+
+/*
+ * gst_camerabin_rewrite_tags_to_bin:
+ * @bin: bin holding tag setter elements
+ * @list: tag list to be written
+ *
+ * This function looks for certain tag setters from given bin
+ * and REPLACES ALL setter tags with given tag list
+ *
+ */
+static void
+gst_camerabin_rewrite_tags_to_bin (GstBin * bin, const GstTagList * list)
+{
+ GstElement *setter;
+ GstElementFactory *setter_factory;
+ const gchar *klass;
+ GstIterator *iter;
+ GstIteratorResult res = GST_ITERATOR_OK;
+ gpointer data;
+
+ iter = gst_bin_iterate_all_by_interface (bin, GST_TYPE_TAG_SETTER);
+
+ while (res == GST_ITERATOR_OK || res == GST_ITERATOR_RESYNC) {
+ res = gst_iterator_next (iter, &data);
+ switch (res) {
+ case GST_ITERATOR_DONE:
+ break;
+ case GST_ITERATOR_RESYNC:
+ gst_iterator_resync (iter);
+ break;
+ case GST_ITERATOR_ERROR:
+ GST_WARNING ("error iterating tag setters");
+ break;
+ case GST_ITERATOR_OK:
+ setter = GST_ELEMENT (data);
+ GST_LOG ("iterating tag setters: %" GST_PTR_FORMAT, setter);
+ setter_factory = gst_element_get_factory (setter);
+ klass = gst_element_factory_get_klass (setter_factory);
+ /* FIXME: check if tags should be written to all tag setters,
+ set tags only to Muxer elements for now */
+ if (g_strrstr (klass, "Muxer")) {
+ GST_DEBUG ("replacement tags %" GST_PTR_FORMAT, list);
+ gst_tag_setter_merge_tags (GST_TAG_SETTER (setter), list,
+ GST_TAG_MERGE_REPLACE_ALL);
+ }
+ gst_object_unref (setter);
+ break;
+ default:
+ break;
+ }
+ }
+
+ gst_iterator_free (iter);
+}
+
+/*
+ * gst_camerabin_get_internal_tags:
+ * @camera: the camera bin element
+ *
+ * Returns tag list containing metadata from camerabin
+ * and it's elements
+ */
+static GstTagList *
+gst_camerabin_get_internal_tags (GstCameraBin * camera)
+{
+ GstTagList *list = gst_tag_list_new ();
+ GstColorBalance *balance = NULL;
+ const GList *controls = NULL, *item;
+ GstColorBalanceChannel *channel;
+ gint min_value, max_value, mid_value, cur_value;
+
+
+ if (camera->active_bin == camera->vidbin) {
+ /* FIXME: check if internal video tag setting is needed */
+ goto done;
+ }
+
+ gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
+ "image-width", camera->width, "image-height", camera->height, NULL);
+
+ gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
+ "capture-digital-zoom", camera->zoom, 100, NULL);
+
+ if (gst_element_implements_interface (GST_ELEMENT (camera),
+ GST_TYPE_COLOR_BALANCE)) {
+ balance = GST_COLOR_BALANCE (camera);
+ }
+
+ if (balance) {
+ controls = gst_color_balance_list_channels (balance);
+ }
+ for (item = controls; item; item = g_list_next (item)) {
+ channel = item->data;
+ min_value = channel->min_value;
+ max_value = channel->max_value;
+ /* the default value would probably better */
+ mid_value = min_value + ((max_value - min_value) / 2);
+ cur_value = gst_color_balance_get_value (balance, channel);
+
+ if (!strcasecmp (channel->label, "brightness")) {
+ /* The value of brightness. The unit is the APEX value (Additive System of Photographic Exposure).
+ * Ordinarily it is given in the range of -99.99 to 99.99. Note that
+ * if the numerator of the recorded value is 0xFFFFFFFF, Unknown shall be indicated.
+ *
+ * BrightnessValue (Bv) = log2 ( B/NK )
+ * Note that: B:cd/cm² (candela per square centimeter), N,K: constant
+ *
+ * http://johnlind.tripod.com/science/scienceexposure.html
+ *
+ */
+ gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
+ "capture-brightness", cur_value, 1, NULL);
+ } else if (!strcasecmp (channel->label, "contrast")) {
+ /* 0 = Normal, 1 = Soft, 2 = Hard */
+
+ gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
+ "capture-contrast",
+ (cur_value == mid_value) ? 0 : ((cur_value < mid_value) ? 1 : 2),
+ NULL);
+ } else if (!strcasecmp (channel->label, "gain")) {
+ /* 0 = Normal, 1 = Low Up, 2 = High Up, 3 = Low Down, 4 = Hight Down */
+ gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
+ "capture-gain",
+ (guint) (cur_value == mid_value) ? 0 : ((cur_value <
+ mid_value) ? 1 : 3), NULL);
+ } else if (!strcasecmp (channel->label, "saturation")) {
+ /* 0 = Normal, 1 = Low, 2 = High */
+ gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
+ "capture-saturation",
+ (cur_value == mid_value) ? 0 : ((cur_value < mid_value) ? 1 : 2),
+ NULL);
+ }
+ }
+
+done:
+
+ return list;
+}
+
+/*
+ * gst_camerabin_rewrite_tags:
+ * @camera: the camera bin element
+ *
+ * Merges application set tags to camerabin internal tags,
+ * and writes them using image or video bin tag setters.
+ */
+static void
+gst_camerabin_rewrite_tags (GstCameraBin * camera)
+{
+ const GstTagList *app_tag_list = NULL;
+ GstTagList *list = NULL;
+
+ /* Get application set tags */
+ app_tag_list = gst_tag_setter_get_tag_list (GST_TAG_SETTER (camera));
+
+ /* Get tags from camerabin and it's elements */
+ list = gst_camerabin_get_internal_tags (camera);
+
+ if (app_tag_list) {
+ gst_tag_list_insert (list, app_tag_list, GST_TAG_MERGE_REPLACE);
+ }
+
+ /* Write tags */
+ gst_camerabin_rewrite_tags_to_bin (GST_BIN (camera->active_bin), list);
+
+ gst_tag_list_free (list);
+}
+
+/*
+ * gst_camerabin_set_capsfilter_caps:
+ * @camera: camerabin object
+ * @new_caps: pointer to caps object to set
+ *
+ * Set given caps to camerabin capsfilters.
+ */
+static void
+gst_camerabin_set_capsfilter_caps (GstCameraBin * camera, GstCaps * new_caps)
+{
+ GstStructure *st;
+
+ GST_INFO_OBJECT (camera, "new_caps:%" GST_PTR_FORMAT, new_caps);
+
+ st = gst_caps_get_structure (new_caps, 0);
+
+ gst_structure_get_int (st, "width", &camera->width);
+ gst_structure_get_int (st, "height", &camera->height);
+
+ if (gst_structure_has_field (st, "framerate")) {
+ gst_structure_get_fraction (st, "framerate", &camera->fps_n,
+ &camera->fps_d);
+ }
+
+ /* Update zoom */
+ gst_camerabin_setup_zoom (camera);
+
+ /* Update capsfilters */
+ g_object_set (G_OBJECT (camera->src_filter), "caps", new_caps, NULL);
+ g_object_set (G_OBJECT (camera->src_zoom_filter), "caps", new_caps, NULL);
+}
+
+/*
+ * img_capture_prepared:
+ * @data: camerabin object
+ *
+ * Callback which is called after image capture has been prepared.
+ */
+static void
+img_capture_prepared (gpointer data)
+{
+ GstCameraBin *camera = GST_CAMERABIN (data);
+
+ GST_INFO_OBJECT (camera, "image capture prepared");
+
+ if (camera->image_capture_caps) {
+ /* Set capsfilters to match arriving image data */
+ gst_camerabin_set_capsfilter_caps (camera, camera->image_capture_caps);
+ }
+
+ g_object_set (G_OBJECT (camera->src_out_sel), "resend-latest", FALSE,
+ "active-pad", camera->pad_src_img, NULL);
+ gst_camerabin_rewrite_tags (camera);
+ gst_element_set_state (GST_ELEMENT (camera->imgbin), GST_STATE_PLAYING);
+}
+
+/*
+ * gst_camerabin_start_image_capture:
+ * @camera: camerabin object
+ *
+ * Initiates image capture.
+ */
+static void
+gst_camerabin_start_image_capture (GstCameraBin * camera)
+{
+ GstStateChangeReturn state_ret;
+ gboolean wait_for_prepare = FALSE;
+ gint width = 0, height = 0, fps_n = 0, fps_d = 0;
+ GstStructure *st;
+
+ GST_INFO_OBJECT (camera, "starting image capture");
+
+ if (GST_IS_ELEMENT (camera->src_vid_src) &&
+ gst_element_implements_interface (camera->src_vid_src,
+ GST_TYPE_PHOTOGRAPHY)) {
+ /* Start image capture preparations using photography iface */
+ wait_for_prepare = TRUE;
+ g_mutex_lock (camera->capture_mutex);
+ if (camera->image_capture_caps) {
+ st = gst_caps_get_structure (camera->image_capture_caps, 0);
+ } else {
+ st = gst_caps_get_structure (camera->view_finder_caps, 0);
+ }
+ gst_structure_get_int (st, "width", &width);
+ gst_structure_get_int (st, "height", &height);
+ gst_structure_get_fraction (st, "framerate", &fps_n, &fps_d);
+ /* Set image capture resolution and frame rate */
+ g_signal_emit_by_name (camera->src_vid_src, "user-res-fps",
+ width, height, fps_n, fps_d, 0);
+
+ /* Enable still image capture mode in v4l2camsrc */
+ if (g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src_vid_src),
+ "capture-mode")) {
+ g_object_set (G_OBJECT (camera->src_vid_src), "capture-mode", 1, NULL);
+ }
+
+ /* Start preparations for image capture */
+ gst_photography_prepare_for_capture (GST_PHOTOGRAPHY (camera->src_vid_src),
+ (GstPhotoCapturePrepared) img_capture_prepared, camera);
+ camera->capturing = TRUE;
+ g_mutex_unlock (camera->capture_mutex);
+ }
+
+ if (!wait_for_prepare) {
+ gst_camerabin_rewrite_tags (camera);
+ state_ret = gst_element_set_state (camera->imgbin, GST_STATE_PLAYING);
+ if (state_ret != GST_STATE_CHANGE_FAILURE) {
+ g_mutex_lock (camera->capture_mutex);
+ g_object_set (G_OBJECT (camera->src_out_sel), "resend-latest", TRUE,
+ "active-pad", camera->pad_src_img, NULL);
+ camera->capturing = TRUE;
+ g_mutex_unlock (camera->capture_mutex);
+ } else {
+ GST_WARNING_OBJECT (camera, "imagebin state change failed");
+ gst_element_set_state (camera->imgbin, GST_STATE_NULL);
+ }
+ }
+}
+
+/*
+ * gst_camerabin_start_video_recording:
+ * @camera: camerabin object
+ *
+ * Initiates video recording.
+ */
+static void
+gst_camerabin_start_video_recording (GstCameraBin * camera)
+{
+ GstStateChangeReturn state_ret;
+ /* FIXME: how to ensure resolution and fps is supported by CPU?
+ * use a queue overrun signal?
+ */
+ GST_INFO_OBJECT (camera, "starting video capture");
+
+ gst_camerabin_rewrite_tags (camera);
+
+ /* Pause the pipeline in order to distribute new clock in paused_to_playing */
+ /* audio src timestamps will be 0 without state change to READY. ??? */
+ gst_element_set_state (GST_ELEMENT (camera), GST_STATE_READY);
+ gst_element_set_locked_state (camera->vidbin, FALSE);
+ state_ret = gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PAUSED);
+
+ if (state_ret != GST_STATE_CHANGE_FAILURE) {
+ g_mutex_lock (camera->capture_mutex);
+ g_object_set (G_OBJECT (camera->src_out_sel), "resend-latest", FALSE,
+ "active-pad", camera->pad_src_vid, NULL);
+
+ /* Enable video mode in v4l2camsrc */
+ if (g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src_vid_src),
+ "capture-mode")) {
+ g_object_set (G_OBJECT (camera->src_vid_src), "capture-mode", 2, NULL);
+ }
+
+ gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PLAYING);
+ gst_element_set_locked_state (camera->vidbin, TRUE);
+ camera->capturing = TRUE;
+ g_mutex_unlock (camera->capture_mutex);
+ } else {
+ GST_WARNING_OBJECT (camera, "videobin state change failed");
+ gst_element_set_state (camera->vidbin, GST_STATE_NULL);
+ gst_camerabin_reset_to_view_finder (camera);
+ }
+}
+
+/*
+ * gst_camerabin_send_video_eos:
+ * @camera: camerabin object
+ *
+ * Generate and send eos event to video bin in order to
+ * finish recording properly.
+ */
+static void
+gst_camerabin_send_video_eos (GstCameraBin * camera)
+{
+ GstPad *videopad;
+
+ g_return_if_fail (camera != NULL);
+
+ /* Send eos event to video bin */
+ GST_INFO_OBJECT (camera, "sending eos to videobin");
+ videopad = gst_element_get_static_pad (camera->vidbin, "sink");
+ gst_pad_send_event (videopad, gst_event_new_eos ());
+ gst_object_unref (videopad);
+}
+
+/*
+ * image_pad_blocked:
+ * @pad: pad to block/unblock
+ * @blocked: TRUE to block, FALSE to unblock
+ * @u_data: camera bin object
+ *
+ * Sends eos event to image bin if blocking pad leading to image bin.
+ * The pad will be unblocked when image bin posts eos message.
+ */
+static void
+image_pad_blocked (GstPad * pad, gboolean blocked, gpointer user_data)
+{
+ GstCameraBin *camera;
+
+ camera = (GstCameraBin *) user_data;
+
+ GST_DEBUG_OBJECT (camera, "%s %s:%s",
+ blocked ? "blocking" : "unblocking", GST_DEBUG_PAD_NAME (pad));
+
+ if (blocked && (pad == camera->pad_src_img)) {
+ /* Send eos and block until image bin reaches eos */
+ GST_DEBUG_OBJECT (camera, "sending eos to image bin");
+ gst_element_send_event (camera->imgbin, gst_event_new_eos ());
+ }
+}
+
+/*
+ * gst_camerabin_have_img_buffer:
+ * @pad: output-selector src pad leading to image bin
+ * @buffer: still image frame
+ * @u_data: camera bin object
+ *
+ * Buffer probe called before sending each buffer to image bin.
+ *
+ * First buffer is always passed directly to image bin. Then pad
+ * is blocked in order to interleave buffers with eos events.
+ * Interleaving eos events and buffers is needed when we have
+ * decoupled elements in the image bin capture pipeline.
+ * After image bin posts eos message, then pad is unblocked.
+ * Next, image bin is changed to READY state in order to save the
+ * file and the application is allowed to decide whether to
+ * continue image capture. If yes, only then the next buffer is
+ * passed to image bin.
+ */
+static gboolean
+gst_camerabin_have_img_buffer (GstPad * pad, GstBuffer * buffer,
+ gpointer u_data)
+{
+ GstCameraBin *camera = (GstCameraBin *) u_data;
+ gboolean ret = TRUE;
+
+ GST_LOG ("got buffer #%d %p with size %d", camera->num_img_buffers,
+ buffer, GST_BUFFER_SIZE (buffer));
+
+ /* Image filename should be set by now */
+ if (g_str_equal (camera->filename->str, "")) {
+ GST_DEBUG_OBJECT (camera, "filename not set, dropping buffer");
+ ret = FALSE;
+ goto done;
+ }
+
+ /* Check for first buffer after capture start, we want to
+ pass it forward directly. */
+ if (!camera->num_img_buffers) {
+ /* Restore filter caps for view finder mode if necessary.
+ The v4l2camsrc switches automatically to view finder
+ resolution after hi-res still image capture. */
+ if (camera->image_capture_caps) {
+ gst_camerabin_set_capsfilter_caps (camera, camera->view_finder_caps);
+ }
+ goto done;
+ }
+
+ /* Close the file of saved image */
+ gst_element_set_state (camera->imgbin, GST_STATE_READY);
+
+ /* Check if the application wants to continue */
+ gst_camerabin_image_capture_continue (camera, camera->filename, &ret);
+
+ if (ret && !camera->stop_requested) {
+ GST_DEBUG_OBJECT (camera, "capturing image \"%s\"", camera->filename->str);
+ g_object_set (G_OBJECT (camera->imgbin), "filename",
+ camera->filename->str, NULL);
+ gst_element_set_state (camera->imgbin, GST_STATE_PLAYING);
+ } else {
+ GST_DEBUG_OBJECT (camera, "not continuing (cont:%d, stop_req:%d)",
+ ret, camera->stop_requested);
+ /* Reset filename to force application set new filename */
+ g_string_assign (camera->filename, "");
+
+ /* Block dataflow to the output-selector to show preview image in
+ view finder. Continue and unblock when capture is stopped */
+ gst_pad_set_blocked_async (camera->srcpad_zoom_filter, TRUE,
+ (GstPadBlockCallback) image_pad_blocked, camera);
+ ret = FALSE; /* Drop the buffer */
+
+ g_mutex_lock (camera->capture_mutex);
+ camera->capturing = FALSE;
+ g_cond_signal (camera->cond);
+ g_mutex_unlock (camera->capture_mutex);
+ }
+
+done:
+
+ if (ret) {
+ camera->num_img_buffers++;
+ /* Block when next buffer arrives, we want to push eos event
+ between frames and make sure that eos reaches the filesink
+ before processing the next buffer. */
+ gst_pad_set_blocked_async (pad, TRUE,
+ (GstPadBlockCallback) image_pad_blocked, camera);
+ }
+
+ return ret;
+}
+
+/*
+ * gst_camerabin_have_vid_buffer:
+ * @pad: output-selector src pad leading to video bin
+ * @buffer: buffer pushed to the pad
+ * @u_data: camerabin object
+ *
+ * Buffer probe for src pad leading to video bin.
+ * Sends eos event to video bin if stop requested and drops
+ * all buffers after this.
+ */
+static gboolean
+gst_camerabin_have_vid_buffer (GstPad * pad, GstBuffer * buffer,
+ gpointer u_data)
+{
+ GstCameraBin *camera = (GstCameraBin *) u_data;
+ gboolean ret = TRUE;
+ GST_LOG ("got video buffer %p with size %d",
+ buffer, GST_BUFFER_SIZE (buffer));
+ if (camera->stop_requested) {
+ gst_camerabin_send_video_eos (camera);
+ ret = FALSE; /* Drop buffer */
+ }
+
+ return ret;
+}
+
+/*
+ * gst_camerabin_reset_to_view_finder:
+ * @camera: camerabin object
+ *
+ * Stop capturing and set camerabin to view finder mode.
+ * Reset capture counters and flags.
+ */
+static void
+gst_camerabin_reset_to_view_finder (GstCameraBin * camera)
+{
+ GstStateChangeReturn state_ret;
+ GST_DEBUG_OBJECT (camera, "resetting");
+
+ /* Set active bin to READY state */
+ if (camera->active_bin) {
+ state_ret = gst_element_set_state (camera->active_bin, GST_STATE_READY);
+ if (state_ret == GST_STATE_CHANGE_FAILURE) {
+ GST_WARNING_OBJECT (camera, "state change failed");
+ gst_element_set_state (camera->active_bin, GST_STATE_NULL);
+ camera->active_bin = NULL;
+ }
+ }
+
+ /* Reset counters and flags */
+ camera->num_img_buffers = 0;
+ camera->stop_requested = FALSE;
+ camera->paused = FALSE;
+
+ if (camera->src_out_sel) {
+ /* Set selector to forward data to view finder */
+ g_object_set (G_OBJECT (camera->src_out_sel), "resend-latest", FALSE,
+ "active-pad", camera->pad_src_view, NULL);
+ }
+
+ /* Unblock, if dataflow to output-selector is blocked due to image preview */
+ if (camera->srcpad_zoom_filter &&
+ gst_pad_is_blocked (camera->srcpad_zoom_filter)) {
+ gst_pad_set_blocked_async (camera->srcpad_zoom_filter, FALSE,
+ (GstPadBlockCallback) image_pad_blocked, camera);
+ }
+ /* Unblock, if dataflow to image bin is blocked due to waiting for eos */
+ if (camera->pad_src_img && gst_pad_is_blocked (camera->pad_src_img)) {
+ gst_pad_set_blocked_async (camera->pad_src_img, FALSE,
+ (GstPadBlockCallback) image_pad_blocked, camera);
+ }
+
+ /* Enable view finder mode in v4l2camsrc */
+ if (camera->src_vid_src &&
+ g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src_vid_src),
+ "capture-mode")) {
+ g_object_set (G_OBJECT (camera->src_vid_src), "capture-mode", 0, NULL);
+ }
+
+ GST_DEBUG_OBJECT (camera, "reset done");
+}
+
+/*
+ * gst_camerabin_do_stop:
+ * @camera: camerabin object
+ *
+ * Raise flag to indicate to image and video bin capture stop.
+ * Stopping paused video recording handled as a special case.
+ * Wait for ongoing capturing to finish.
+ */
+static void
+gst_camerabin_do_stop (GstCameraBin * camera)
+{
+ g_mutex_lock (camera->capture_mutex);
+ if (camera->capturing) {
+ GST_DEBUG_OBJECT (camera, "mark stop");
+ camera->stop_requested = TRUE;
+
+ /* Take special care when stopping paused video capture */
+ if ((camera->active_bin == camera->vidbin) && camera->paused) {
+ /* Send eos event to video bin before setting it to playing */
+ gst_camerabin_send_video_eos (camera);
+ /* We must change to playing now in order to get video bin eos events
+ and buffered data through and finish recording properly */
+ gst_element_set_state (GST_ELEMENT (camera->vidbin), GST_STATE_PLAYING);
+ camera->paused = FALSE;
+ }
+
+ GST_DEBUG_OBJECT (camera, "waiting for capturing to finish");
+ g_cond_wait (camera->cond, camera->capture_mutex);
+ GST_DEBUG_OBJECT (camera, "capturing finished");
+ }
+ g_mutex_unlock (camera->capture_mutex);
+}
+
+/*
+ * gst_camerabin_default_signal_img_done:
+ * @camera: camerabin object
+ * @fname: new filename
+ *
+ * Default handler for #GstCameraBin::img-done signal,
+ * stops always capture.
+ *
+ * Returns: FALSE always
+ */
+static gboolean
+gst_camerabin_default_signal_img_done (GstCameraBin * camera, GString * fname)
+{
+ return FALSE;
+}
+
+/*
+ * gst_camerabin_set_allowed_framerate:
+ * @camera: camerabin object
+ * @filter_caps: update allowed framerate to these caps
+ *
+ * Find allowed frame rate from video source that matches with
+ * resolution in @filter_caps. Set found frame rate to @filter_caps.
+ */
+static void
+gst_camerabin_set_allowed_framerate (GstCameraBin * camera,
+ GstCaps * filter_caps)
+{
+ GstStructure *structure;
+ GstCaps *allowed_caps = NULL, *intersect = NULL;
+ const GValue *framerate = NULL;
+ guint caps_size, i;
+
+ /* Get supported caps from video src that matches with new filter caps */
+ GST_INFO_OBJECT (camera, "filter caps:%" GST_PTR_FORMAT, filter_caps);
+ allowed_caps = gst_camerabin_get_allowed_input_caps (camera);
+ intersect = gst_caps_intersect (allowed_caps, filter_caps);
+ GST_INFO_OBJECT (camera, "intersect caps:%" GST_PTR_FORMAT, intersect);
+
+ /* Find the best framerate from the caps */
+ caps_size = gst_caps_get_size (intersect);
+ for (i = 0; i < caps_size; i++) {
+ structure = gst_caps_get_structure (intersect, i);
+ framerate =
+ gst_camerabin_find_better_framerate (camera, structure, framerate);
+ }
+
+ if (GST_VALUE_HOLDS_FRACTION (framerate)) {
+ gst_caps_set_simple (filter_caps,
+ "framerate", GST_TYPE_FRACTION,
+ gst_value_get_fraction_numerator (framerate),
+ gst_value_get_fraction_denominator (framerate), NULL);
+ }
+
+ if (allowed_caps) {
+ gst_caps_unref (allowed_caps);
+ }
+ if (intersect) {
+ gst_caps_unref (intersect);
+ }
+}
+
+
+/**
+ * get_srcpad_current_format:
+ * @element: element to get the format from
+ *
+ * Helper function to get the negotiated fourcc
+ * format from @element src pad.
+ *
+ * Returns: negotiated format (fourcc), 0 if not found
+ */
+static guint32
+get_srcpad_current_format (GstElement * element)
+{
+ GstPad *srcpad = NULL;
+ GstCaps *srccaps = NULL;
+ GstStructure *structure;
+ guint32 format = 0;
+
+ g_return_val_if_fail (element != NULL, 0);
+
+ if ((srcpad = gst_element_get_static_pad (element, "src")) == NULL) {
+ goto no_pad;
+ }
+
+ if ((srccaps = gst_pad_get_negotiated_caps (srcpad)) == NULL) {
+ goto no_caps;
+ }
+
+ GST_LOG ("negotiated caps %" GST_PTR_FORMAT, srccaps);
+
+ structure = gst_caps_get_structure (srccaps, 0);
+ if (gst_structure_has_field (structure, "format")) {
+ gst_structure_get_fourcc (structure, "format", &format);
+ }
+
+ gst_caps_unref (srccaps);
+no_caps:
+ gst_object_unref (srcpad);
+no_pad:
+ GST_DEBUG ("current format for %" GST_PTR_FORMAT ": %" GST_FOURCC_FORMAT,
+ element, GST_FOURCC_ARGS (format));
+ return format;
+}
+
+/*
+ * gst_camerabin_find_better_framerate:
+ * @camera: camerabin object
+ * @st: structure that contains framerate candidates
+ * @orig_framerate: best framerate so far
+ *
+ * Looks for framerate better than @orig_framerate from @st structure.
+ * In night mode lowest framerate is considered best, otherwise highest is
+ * best.
+ *
+ * Returns: @orig_framerate or better if found
+ */
+static const GValue *
+gst_camerabin_find_better_framerate (GstCameraBin * camera, GstStructure * st,
+ const GValue * orig_framerate)
+{
+ const GValue *framerate = NULL;
+ guint i, i_best, list_size;
+ gint res, comparison;
+
+ if (camera->night_mode) {
+ GST_LOG_OBJECT (camera, "finding min framerate");
+ comparison = GST_VALUE_LESS_THAN;
+ } else {
+ GST_LOG_OBJECT (camera, "finding max framerate");
+ comparison = GST_VALUE_GREATER_THAN;
+ }
+
+ if (gst_structure_has_field (st, "framerate")) {
+ framerate = gst_structure_get_value (st, "framerate");
+ /* Handle framerate lists */
+ if (GST_VALUE_HOLDS_LIST (framerate)) {
+ list_size = gst_value_list_get_size (framerate);
+ GST_LOG_OBJECT (camera, "finding framerate from list");
+ for (i = 0, i_best = 0; i < list_size; i++) {
+ res = gst_value_compare (gst_value_list_get_value (framerate, i),
+ gst_value_list_get_value (framerate, i_best));
+ if (comparison == res) {
+ i_best = i;
+ }
+ }
+ GST_LOG_OBJECT (camera, "found best framerate from index %d", i_best);
+ framerate = gst_value_list_get_value (framerate, i_best);
+ }
+ /* Handle framerate ranges */
+ if (GST_VALUE_HOLDS_FRACTION_RANGE (framerate)) {
+ if (camera->night_mode) {
+ GST_LOG_OBJECT (camera, "getting min framerate from range");
+ framerate = gst_value_get_fraction_range_min (framerate);
+ } else {
+ GST_LOG_OBJECT (camera, "getting max framerate from range");
+ framerate = gst_value_get_fraction_range_max (framerate);
+ }
+ }
+ }
+
+ /* Check if we found better framerate */
+ if (orig_framerate && framerate) {
+ res = gst_value_compare (orig_framerate, framerate);
+ if (comparison == res) {
+ GST_LOG_OBJECT (camera, "original framerate was the best");
+ framerate = orig_framerate;
+ }
+ }
+
+ return framerate;
+}
+
+/*
+ * GObject callback functions implementation
+ */
+
+static void
+gst_camerabin_base_init (gpointer gclass)
+{
+ static GstElementDetails element_details = {
+ "Camera Bin",
+ "Generic/Bin/Camera",
+ "Handle lot of features present in DSC",
+ "Nokia Corporation <multimedia@maemo.org>\n"
+ "Edgard Lima <edgard.lima@indt.org.br>"
+ };
+ GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+ gst_element_class_set_details (element_class, &element_details);
+}
+
+static void
+gst_camerabin_class_init (GstCameraBinClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+ GstBinClass *gstbin_class;
+
+ gobject_class = G_OBJECT_CLASS (klass);
+ gstelement_class = GST_ELEMENT_CLASS (klass);
+ gstbin_class = GST_BIN_CLASS (klass);
+
+ /* gobject */
+
+ gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_camerabin_dispose);
+ gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_camerabin_finalize);
+
+ gobject_class->set_property = gst_camerabin_set_property;
+ gobject_class->get_property = gst_camerabin_get_property;
+
+ /**
+ * GstCameraBin:filename:
+ *
+ * Set filename for the still image capturing or video capturing.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_FILENAME,
+ g_param_spec_string ("filename", "Filename",
+ "Filename of the image or video to save", "", G_PARAM_READWRITE));
+
+ /**
+ * GstCameraBin:mode:
+ *
+ * Set the mode of operation: still image capturing or video recording.
+ * Setting the mode will create and destroy image bin or video bin elements
+ * according to the mode. You can set this property at any time, changing
+ * the mode will stop ongoing capture.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_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));
+
+ /**
+ * GstCameraBin:mute:
+ *
+ * Mute audio in video recording mode.
+ * Set this property only when #GstCameraBin is in READY, PAUSED or PLAYING.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_MUTE,
+ g_param_spec_boolean ("mute", "Mute",
+ "True to mute the recording. False to record with audio",
+ ARG_DEFAULT_MUTE, G_PARAM_READWRITE));
+
+ /**
+ * GstCameraBin:zoom:
+ *
+ * Set up the zoom applied to the frames.
+ * Set this property only when #GstCameraBin is in READY, PAUSED or PLAYING.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_ZOOM,
+ g_param_spec_int ("zoom", "Zoom",
+ "The zoom. 100 for 1x, 200 for 2x and so on",
+ MIN_ZOOM, MAX_ZOOM, DEFAULT_ZOOM, G_PARAM_READWRITE));
+
+ /**
+ * GstCameraBin:imagepp:
+ *
+ * Set up an element to do image post processing.
+ * This property can only be set while #GstCameraBin is in NULL state.
+ * The ownership of the element will be taken by #GstCameraBin.
+ */
+ g_object_class_install_property (gobject_class, ARG_IMAGE_POST,
+ g_param_spec_object ("imagepp", "Image post processing element",
+ "Image Post-Processing GStreamer element (default is NULL)",
+ GST_TYPE_ELEMENT, G_PARAM_READWRITE));
+
+ /**
+ * GstCameraBin:imageenc:
+ *
+ * Set up an image encoder (for example, jpegenc or pngenc) element.
+ * This property can only be set while #GstCameraBin is in NULL state.
+ * The ownership of the element will be taken by #GstCameraBin.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_IMAGE_ENC,
+ g_param_spec_object ("imageenc", "Image encoder",
+ "Image encoder GStreamer element (default is jpegenc)",
+ GST_TYPE_ELEMENT, G_PARAM_READWRITE));
+
+ /**
+ * GstCameraBin:videopp:
+ *
+ * Set up an element to do video post processing.
+ * This property can only be set while #GstCameraBin is in NULL state.
+ * The ownership of the element will be taken by #GstCameraBin.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_VIDEO_POST,
+ g_param_spec_object ("videopp", "Video post processing element",
+ "Video post processing GStreamer element (default is NULL)",
+ GST_TYPE_ELEMENT, G_PARAM_READWRITE));
+
+ /**
+ * GstCameraBin:videoenc:
+ *
+ * Set up a video encoder element.
+ * This property can only be set while #GstCameraBin is in NULL state.
+ * The ownership of the element will be taken by #GstCameraBin.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_VIDEO_ENC,
+ g_param_spec_object ("videoenc", "Video encoder",
+ "Video encoder GStreamer element (default is theoraenc)",
+ GST_TYPE_ELEMENT, G_PARAM_READWRITE));
+
+ /**
+ * GstCameraBin:audioenc:
+ *
+ * Set up an audio encoder element.
+ * This property can only be set while #GstCameraBin is in NULL state.
+ * The ownership of the element will be taken by #GstCameraBin.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_AUDIO_ENC,
+ g_param_spec_object ("audioenc", "Audio encoder",
+ "Audio encoder GStreamer element (default is vorbisenc)",
+ GST_TYPE_ELEMENT, G_PARAM_READWRITE));
+
+ /**
+ * GstCameraBin:videomux:
+ *
+ * Set up a video muxer element.
+ * This property can only be set while #GstCameraBin is in NULL state.
+ * The ownership of the element will be taken by #GstCameraBin.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_VIDEO_MUX,
+ g_param_spec_object ("videomux", "Video muxer",
+ "Video muxer GStreamer element (default is oggmux)",
+ GST_TYPE_ELEMENT, G_PARAM_READWRITE));
+
+ /**
+ * GstCameraBin:vfsink:
+ *
+ * Set up a sink element to render frames in view finder.
+ * By default "autovideosink" will be the sink element.
+ * This property can only be set while #GstCameraBin is in NULL state.
+ * The ownership of the element will be taken by #GstCameraBin.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_VF_SINK,
+ g_param_spec_object ("vfsink", "View finder sink",
+ "View finder sink GStreamer element (default is " DEFAULT_VIEW_SINK
+ ")", GST_TYPE_ELEMENT, G_PARAM_READWRITE));
+
+ /**
+ * GstCameraBin:videosrc:
+ *
+ * Set up a video source element.
+ * By default "v4l2src" will be the src element.
+ * This property can only be set while #GstCameraBin is in NULL state.
+ * The ownership of the element will be taken by #GstCameraBin.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_VIDEO_SRC,
+ g_param_spec_object ("videosrc", "Video source element",
+ "Video source GStreamer element (default is " DEFAULT_SRC_VID_SRC ")",
+ GST_TYPE_ELEMENT, G_PARAM_READWRITE));
+ /**
+ * GstCameraBin:audiosrc:
+ *
+ * Set up an audio source element.
+ * By default "pulsesrc" will be the source element.
+ * This property can only be set while #GstCameraBin is in NULL state.
+ * The ownership of the element will be taken by #GstCameraBin.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_AUDIO_SRC,
+ g_param_spec_object ("audiosrc", "Audio source element",
+ "Audio source GStreamer element (default is pulsesrc)",
+ GST_TYPE_ELEMENT, G_PARAM_READWRITE));
+
+ /**
+ * GstCameraBin:inputcaps:
+ *
+ * The allowed modes of operation of the video source. Have in mind that it
+ * doesn't mean #GstCameraBin can operate in all those modes,
+ * it depends also on the other elements in the pipeline. Remember to
+ * gst_caps_unref after using it.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_INPUT_CAPS,
+ g_param_spec_boxed ("inputcaps", "Input caps",
+ "The allowed modes of the video source operation",
+ GST_TYPE_CAPS, G_PARAM_READABLE));
+
+ /**
+ * GstCameraBin:filter-caps:
+ *
+ * Filter video source element caps using this property.
+ * This is an alternative to #GstCamerabin::user-res-fps action
+ * signal that allows more fine grained control of video source.
+ */
+
+ g_object_class_install_property (gobject_class, ARG_FILTER_CAPS,
+ g_param_spec_boxed ("filter-caps", "Filter caps",
+ "Capsfilter caps used to control video source operation",
+ GST_TYPE_CAPS, G_PARAM_READWRITE));
+
+ /**
+ * GstCameraBin::user-start:
+ * @camera: the camera bin element
+ *
+ * Starts image capture or video recording depending on the Mode.
+ * If there is a capture already going on, does nothing.
+ * Resumes video recording if it has been paused.
+ */
+
+ camerabin_signals[USER_START_SIGNAL] =
+ g_signal_new ("user-start",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+ G_STRUCT_OFFSET (GstCameraBinClass, user_start),
+ NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+
+ /**
+ * GstCameraBin::user-stop:
+ * @camera: the camera bin element
+ *
+ * Stops still image preview, continuous image capture and video
+ * recording and returns to the view finder mode.
+ */
+
+ camerabin_signals[USER_STOP_SIGNAL] =
+ g_signal_new ("user-stop",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+ G_STRUCT_OFFSET (GstCameraBinClass, user_stop),
+ NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+
+ /**
+ * GstCameraBin::user-pause:
+ * @camera: the camera bin element
+ *
+ * Pauses video recording or resumes paused video recording.
+ * If in image mode or not recording, does nothing.
+ */
+
+ camerabin_signals[USER_PAUSE_SIGNAL] =
+ g_signal_new ("user-pause",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+ G_STRUCT_OFFSET (GstCameraBinClass, user_pause),
+ NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+
+ /**
+ * GstCameraBin::user-res-fps:
+ * @camera: the camera bin element
+ * @width: number of horizontal pixels
+ * @height: number of vertical pixels
+ * @fps_n: frames per second numerator
+ * @fps_d: frames per second denominator
+ *
+ * Changes the frame resolution and frames per second of the video source.
+ * The application must be aware of the resolutions supported by the camera.
+ * Supported resolutions and frame rates can be get using input-caps property.
+ *
+ * Setting @fps_n or @fps_d to 0 configures maximum framerate for the
+ * given resolution, unless in night mode when minimum is configured.
+ */
+
+ camerabin_signals[USER_RES_FPS_SIGNAL] =
+ g_signal_new ("user-res-fps",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+ G_STRUCT_OFFSET (GstCameraBinClass, user_res_fps),
+ NULL, NULL, gst_camerabin_marshal_VOID__INT_INT_INT_INT, G_TYPE_NONE, 4,
+ G_TYPE_INT, G_TYPE_INT, G_TYPE_INT, G_TYPE_INT);
+
+ /**
+ * GstCameraBin::user-image-res:
+ * @camera: the camera bin element
+ * @width: number of horizontal pixels
+ * @height: number of vertical pixels
+ *
+ * Changes the resolution used for still image capture.
+ * Does not affect view finder mode and video recording.
+ * Use this action signal in PAUSED or PLAYING state.
+ */
+
+ camerabin_signals[USER_IMAGE_RES_SIGNAL] =
+ g_signal_new ("user-image-res",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+ G_STRUCT_OFFSET (GstCameraBinClass, user_image_res),
+ NULL, NULL, gst_camerabin_marshal_VOID__INT_INT, G_TYPE_NONE, 2,
+ G_TYPE_INT, G_TYPE_INT);
+
+ /**
+ * GstCameraBin::img-done:
+ * @camera: the camera bin element
+ * @filename: the name of the file just saved
+ *
+ * Signal emited when the file has just been saved. To continue taking
+ * pictures just update @filename and return TRUE, otherwise return FALSE.
+ *
+ * Don't call any #GstCameraBin method from this signal, if you do so there
+ * will be a deadlock.
+ */
+
+ camerabin_signals[IMG_DONE_SIGNAL] =
+ g_signal_new ("img-done", G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstCameraBinClass, img_done),
+ g_signal_accumulator_true_handled, NULL, gst_marshal_BOOLEAN__POINTER,
+ G_TYPE_BOOLEAN, 1, G_TYPE_POINTER);
+
+ klass->user_start = gst_camerabin_user_start;
+ klass->user_stop = gst_camerabin_user_stop;
+ klass->user_pause = gst_camerabin_user_pause;
+ klass->user_res_fps = gst_camerabin_user_res_fps;
+ klass->user_image_res = gst_camerabin_user_image_res;
+
+ klass->img_done = gst_camerabin_default_signal_img_done;
+
+ /* gstelement */
+
+ gstelement_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_camerabin_change_state);
+
+ /* gstbin */
+ /* override handle_message to peek when video or image bin reaches eos */
+ gstbin_class->handle_message =
+ GST_DEBUG_FUNCPTR (gst_camerabin_handle_message_func);
+
+}
+
+/* initialize the new element
+ * instantiate pads and add them to element
+ * set functions
+ * initialize structure
+ */
+static void
+gst_camerabin_init (GstCameraBin * camera, GstCameraBinClass * gclass)
+{
+ /* GstElementClass *klass = GST_ELEMENT_GET_CLASS (camera); */
+
+ camera->filename = g_string_new ("");
+ camera->mode = DEFAULT_MODE;
+ camera->num_img_buffers = 0;
+ camera->stop_requested = FALSE;
+ camera->paused = FALSE;
+ camera->capturing = FALSE;
+ camera->night_mode = FALSE;
+
+ camera->width = DEFAULT_WIDTH;
+ camera->height = DEFAULT_HEIGHT;
+ camera->fps_n = DEFAULT_FPS_N;
+ camera->fps_d = DEFAULT_FPS_D;
+
+ camera->image_capture_caps = NULL;
+ camera->view_finder_caps = NULL;
+ camera->allowed_caps = NULL;
+
+ camera->zoom = DEFAULT_ZOOM;
+
+ /* concurrency control */
+ camera->capture_mutex = g_mutex_new ();
+ camera->cond = g_cond_new ();
+
+ /* pad names for output and input selectors */
+ camera->pad_src_view = NULL;
+ camera->pad_view_src = NULL;
+ camera->pad_src_img = NULL;
+ camera->pad_view_img = NULL;
+ camera->pad_src_vid = NULL;
+ camera->pad_view_vid = NULL;
+ camera->srcpad_zoom_filter = NULL;
+
+ /* source elements */
+ camera->src_vid_src = NULL;
+ camera->src_filter = NULL;
+ camera->src_zoom_crop = NULL;
+ camera->src_zoom_scale = NULL;
+ camera->src_zoom_filter = NULL;
+ camera->src_out_sel = NULL;
+
+ camera->user_vf_sink = NULL;
+
+ /* image capture bin */
+ camera->imgbin = g_object_new (GST_TYPE_CAMERABIN_IMAGE, NULL);
+ gst_object_ref (camera->imgbin);
+
+ /* video capture bin */
+ camera->vidbin = g_object_new (GST_TYPE_CAMERABIN_VIDEO, NULL);
+ gst_object_ref (camera->vidbin);
+
+ camera->active_bin = NULL;
+
+ /* view finder elements */
+ camera->view_in_sel = NULL;
+ camera->view_scale = NULL;
+ camera->view_sink = NULL;
+}
+
+static void
+gst_camerabin_dispose (GObject * object)
+{
+ GstCameraBin *camera;
+
+ camera = GST_CAMERABIN (object);
+
+ GST_DEBUG_OBJECT (camera, "disposing");
+
+ gst_element_set_state (camera->imgbin, GST_STATE_NULL);
+ gst_object_unref (camera->imgbin);
+
+ gst_element_set_state (camera->vidbin, GST_STATE_NULL);
+ gst_object_unref (camera->vidbin);
+
+ camerabin_destroy_elements (camera);
+
+ camerabin_dispose_elements (camera);
+
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gst_camerabin_finalize (GObject * object)
+{
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_camerabin_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstCameraBin *camera = GST_CAMERABIN (object);
+
+ switch (prop_id) {
+ case ARG_MUTE:
+ gst_camerabin_video_set_mute (GST_CAMERABIN_VIDEO (camera->vidbin),
+ g_value_get_boolean (value));
+ break;
+ case ARG_ZOOM:
+ g_atomic_int_set (&camera->zoom, g_value_get_int (value));
+ gst_camerabin_setup_zoom (camera);
+ break;
+ case ARG_MODE:
+ gst_camerabin_change_mode (camera, g_value_get_enum (value));
+ break;
+ case ARG_FILENAME:
+ gst_camerabin_change_filename (camera, g_value_get_string (value));
+ break;
+ case ARG_VIDEO_POST:
+ if (GST_STATE (camera->vidbin) != GST_STATE_NULL) {
+ GST_WARNING_OBJECT (camera,
+ "can't use set element until next video bin NULL to READY state change");
+ }
+ gst_camerabin_video_set_post (GST_CAMERABIN_VIDEO (camera->vidbin),
+ g_value_get_object (value));
+ break;
+ case ARG_VIDEO_ENC:
+ if (GST_STATE (camera->vidbin) != GST_STATE_NULL) {
+ GST_WARNING_OBJECT (camera,
+ "can't use set element until next video bin NULL to READY state change");
+ }
+ gst_camerabin_video_set_video_enc (GST_CAMERABIN_VIDEO (camera->vidbin),
+ g_value_get_object (value));
+ break;
+ case ARG_AUDIO_ENC:
+ if (GST_STATE (camera->vidbin) != GST_STATE_NULL) {
+ GST_WARNING_OBJECT (camera,
+ "can't use set element until next video bin NULL to READY state change");
+ }
+ gst_camerabin_video_set_audio_enc (GST_CAMERABIN_VIDEO (camera->vidbin),
+ g_value_get_object (value));
+ break;
+ case ARG_VIDEO_MUX:
+ if (GST_STATE (camera->vidbin) != GST_STATE_NULL) {
+ GST_WARNING_OBJECT (camera->vidbin,
+ "can't use set element until next video bin NULL to READY state change");
+ }
+ gst_camerabin_video_set_muxer (GST_CAMERABIN_VIDEO (camera->vidbin),
+ g_value_get_object (value));
+ break;
+ case ARG_IMAGE_POST:
+ if (GST_STATE (camera->imgbin) != GST_STATE_NULL) {
+ GST_WARNING_OBJECT (camera,
+ "can't use set element until next image bin NULL to READY state change");
+ }
+ gst_camerabin_image_set_postproc (GST_CAMERABIN_IMAGE (camera->imgbin),
+ g_value_get_object (value));
+ break;
+ case ARG_IMAGE_ENC:
+ if (GST_STATE (camera->imgbin) != GST_STATE_NULL) {
+ GST_WARNING_OBJECT (camera,
+ "can't use set element until next image bin NULL to READY state change");
+ }
+ gst_camerabin_image_set_encoder (GST_CAMERABIN_IMAGE (camera->imgbin),
+ g_value_get_object (value));
+ break;
+ case ARG_VF_SINK:
+ if (GST_STATE (camera) != GST_STATE_NULL) {
+ GST_ELEMENT_ERROR (camera, CORE, FAILED,
+ ("camerabin must be in NULL state when setting the view finder element"),
+ (NULL));
+ } else {
+ if (camera->user_vf_sink)
+ gst_object_unref (camera->user_vf_sink);
+ camera->user_vf_sink = g_value_get_object (value);
+ gst_object_ref (camera->user_vf_sink);
+ }
+ break;
+ case ARG_VIDEO_SRC:
+ if (GST_STATE (camera) != GST_STATE_NULL) {
+ GST_ELEMENT_ERROR (camera, CORE, FAILED,
+ ("camerabin must be in NULL state when setting the video source element"),
+ (NULL));
+ } else {
+ if (camera->user_vid_src)
+ gst_object_unref (camera->user_vid_src);
+ camera->user_vid_src = g_value_get_object (value);
+ gst_object_ref (camera->user_vid_src);
+ }
+ break;
+ case ARG_AUDIO_SRC:
+ if (GST_STATE (camera->vidbin) != GST_STATE_NULL) {
+ GST_WARNING_OBJECT (camera,
+ "can't use set element until next video bin NULL to READY state change");
+ }
+ gst_camerabin_video_set_audio_src (GST_CAMERABIN_VIDEO (camera->vidbin),
+ g_value_get_object (value));
+ break;
+ case ARG_FILTER_CAPS:
+ GST_OBJECT_LOCK (camera);
+ if (camera->view_finder_caps) {
+ gst_caps_unref (camera->view_finder_caps);
+ }
+ camera->view_finder_caps = gst_caps_copy (gst_value_get_caps (value));
+ GST_OBJECT_UNLOCK (camera);
+ gst_camerabin_set_capsfilter_caps (camera, camera->view_finder_caps);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_camerabin_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstCameraBin *camera = GST_CAMERABIN (object);
+
+ switch (prop_id) {
+ case ARG_FILENAME:
+ g_value_set_string (value, camera->filename->str);
+ break;
+ case ARG_MODE:
+ g_value_set_enum (value, camera->mode);
+ break;
+ case ARG_MUTE:
+ g_value_set_boolean (value,
+ gst_camerabin_video_get_mute (GST_CAMERABIN_VIDEO (camera->vidbin)));
+ break;
+ case ARG_ZOOM:
+ g_value_set_int (value, g_atomic_int_get (&camera->zoom));
+ break;
+ case ARG_IMAGE_POST:
+ g_value_set_object (value,
+ gst_camerabin_image_get_postproc (GST_CAMERABIN_IMAGE
+ (camera->imgbin)));
+ break;
+ case ARG_IMAGE_ENC:
+ g_value_set_object (value,
+ gst_camerabin_image_get_encoder (GST_CAMERABIN_IMAGE
+ (camera->imgbin)));
+ break;
+ case ARG_VIDEO_POST:
+ g_value_set_object (value,
+ gst_camerabin_video_get_post (GST_CAMERABIN_VIDEO (camera->vidbin)));
+ break;
+ case ARG_VIDEO_ENC:
+ g_value_set_object (value,
+ gst_camerabin_video_get_video_enc (GST_CAMERABIN_VIDEO
+ (camera->vidbin)));
+ break;
+ case ARG_AUDIO_ENC:
+ g_value_set_object (value,
+ gst_camerabin_video_get_audio_enc (GST_CAMERABIN_VIDEO
+ (camera->vidbin)));
+ break;
+ case ARG_VIDEO_MUX:
+ g_value_set_object (value,
+ gst_camerabin_video_get_muxer (GST_CAMERABIN_VIDEO (camera->vidbin)));
+ break;
+ case ARG_VF_SINK:
+ g_value_set_object (value, camera->user_vf_sink);
+ break;
+ case ARG_VIDEO_SRC:
+ g_value_set_object (value, camera->src_vid_src);
+ break;
+ case ARG_AUDIO_SRC:
+ g_value_set_object (value,
+ gst_camerabin_video_get_audio_src (GST_CAMERABIN_VIDEO
+ (camera->vidbin)));
+ break;
+ case ARG_INPUT_CAPS:
+ gst_value_set_caps (value, gst_camerabin_get_allowed_input_caps (camera));
+ break;
+ case ARG_FILTER_CAPS:
+ gst_value_set_caps (value, camera->view_finder_caps);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+/*
+ * GstElement functions implementation
+ */
+
+static GstStateChangeReturn
+gst_camerabin_change_state (GstElement * element, GstStateChange transition)
+{
+ GstCameraBin *camera = GST_CAMERABIN (element);
+ GstStateChangeReturn ret;
+
+ switch (transition) {
+ case GST_STATE_CHANGE_NULL_TO_READY:
+ if (!camerabin_create_elements (camera)) {
+ ret = GST_STATE_CHANGE_FAILURE;
+ goto done;
+ }
+ /* Lock to control image and video bin state separately
+ from view finder */
+ gst_element_set_locked_state (camera->imgbin, TRUE);
+ gst_element_set_locked_state (camera->vidbin, TRUE);
+ break;
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ camerabin_setup_src_elements (camera);
+ break;
+ case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
+ /* If using autovideosink, set view finder sink properties
+ now that actual sink has been created. */
+ camerabin_setup_view_elements (camera);
+ break;
+ case GST_STATE_CHANGE_READY_TO_NULL:
+ gst_element_set_locked_state (camera->imgbin, FALSE);
+ gst_element_set_locked_state (camera->vidbin, FALSE);
+ break;
+ default:
+ break;
+ }
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ GST_LOG_OBJECT (camera, "PAUSED to READY");
+ g_mutex_lock (camera->capture_mutex);
+ if (camera->capturing) {
+ GST_WARNING_OBJECT (camera, "was capturing when changing to READY");
+ camera->capturing = FALSE;
+ /* Reset capture and don't wait for capturing to finish properly.
+ Proper capturing should have been finished before going to READY. */
+ gst_camerabin_reset_to_view_finder (camera);
+ g_cond_signal (camera->cond);
+ }
+ g_mutex_unlock (camera->capture_mutex);
+ break;
+ case GST_STATE_CHANGE_READY_TO_NULL:
+ camerabin_destroy_elements (camera);
+ break;
+ default:
+ break;
+ }
+
+done:
+
+ return ret;
+}
+
+/*
+ * GstBin functions implementation
+ */
+
+/* Peek eos messages but don't interfere with bin msg handling */
+static void
+gst_camerabin_handle_message_func (GstBin * bin, GstMessage * msg)
+{
+ GstCameraBin *camera = GST_CAMERABIN (bin);
+
+ switch (GST_MESSAGE_TYPE (msg)) {
+ case GST_MESSAGE_EOS:
+ if (GST_MESSAGE_SRC (msg) == GST_OBJECT (camera->vidbin)) {
+ /* Video eos */
+ GST_DEBUG_OBJECT (camera,
+ "got video eos message, stopping video capture");
+ g_mutex_lock (camera->capture_mutex);
+ camera->capturing = FALSE;
+ g_cond_signal (camera->cond);
+ g_mutex_unlock (camera->capture_mutex);
+ } else if (GST_MESSAGE_SRC (msg) == GST_OBJECT (camera->imgbin)) {
+ /* Image eos */
+ GST_DEBUG_OBJECT (camera, "got image eos message");
+ /* Unblock pad to process next buffer */
+ gst_pad_set_blocked_async (camera->pad_src_img, FALSE,
+ (GstPadBlockCallback) image_pad_blocked, camera);
+ }
+ break;
+ default:
+ break;
+ }
+ GST_BIN_CLASS (parent_class)->handle_message (bin, msg);
+}
+
+/*
+ * Action signal function implementation
+ */
+
+static void
+gst_camerabin_user_start (GstCameraBin * camera)
+{
+
+ GST_INFO_OBJECT (camera, "starting capture");
+ if (camera->paused) {
+ gst_camerabin_user_pause (camera);
+ return;
+ }
+
+ if (!camera->active_bin) {
+ GST_INFO_OBJECT (camera, "mode not explicitly set by application");
+ gst_camerabin_change_mode (camera, camera->mode);
+ }
+
+ if (g_str_equal (camera->filename->str, "")) {
+ GST_ELEMENT_ERROR (camera, CORE, FAILED,
+ ("set filename before starting capture"), (NULL));
+ return;
+ }
+
+ g_mutex_lock (camera->capture_mutex);
+ if (camera->capturing) {
+ GST_WARNING_OBJECT (camera, "capturing \"%s\" ongoing, set new filename",
+ camera->filename->str);
+ g_mutex_unlock (camera->capture_mutex);
+ return;
+ }
+ g_mutex_unlock (camera->capture_mutex);
+
+ g_object_set (G_OBJECT (camera->active_bin), "filename",
+ camera->filename->str, NULL);
+
+ if (camera->active_bin == camera->imgbin) {
+ gst_camerabin_start_image_capture (camera);
+ } else if (camera->active_bin == camera->vidbin) {
+ gst_camerabin_start_video_recording (camera);
+ }
+}
+
+static void
+gst_camerabin_user_stop (GstCameraBin * camera)
+{
+ GST_INFO_OBJECT (camera, "stopping %s capture",
+ camera->mode ? "video" : "image");
+ gst_camerabin_do_stop (camera);
+ gst_camerabin_reset_to_view_finder (camera);
+}
+
+static void
+gst_camerabin_user_pause (GstCameraBin * camera)
+{
+ if (camera->active_bin == camera->vidbin) {
+ if (!camera->paused) {
+ GST_INFO_OBJECT (camera, "pausing capture");
+
+ /* Bring all camerabin elements to PAUSED */
+ gst_element_set_locked_state (camera->vidbin, FALSE);
+ gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PAUSED);
+
+ /* Switch to view finder mode */
+ g_object_set (G_OBJECT (camera->src_out_sel), "resend-latest", FALSE,
+ "active-pad", camera->pad_src_view, NULL);
+
+ /* Enable view finder mode in v4l2camsrc */
+ if (g_object_class_find_property (G_OBJECT_GET_CLASS
+ (camera->src_vid_src), "capture-mode")) {
+ g_object_set (G_OBJECT (camera->src_vid_src), "capture-mode", 0, NULL);
+ }
+
+ /* Set view finder to PLAYING and leave videobin PAUSED */
+ gst_element_set_locked_state (camera->vidbin, TRUE);
+ gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PLAYING);
+
+ camera->paused = TRUE;
+ } else {
+ GST_INFO_OBJECT (camera, "unpausing capture");
+
+ /* Bring all camerabin elements to PAUSED */
+ gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PAUSED);
+
+ /* Switch to video recording mode */
+ g_object_set (G_OBJECT (camera->src_out_sel), "resend-latest", TRUE,
+ "active-pad", camera->pad_src_vid, NULL);
+
+ /* Enable video recording mode in v4l2camsrc */
+ if (g_object_class_find_property (G_OBJECT_GET_CLASS
+ (camera->src_vid_src), "capture-mode")) {
+ g_object_set (G_OBJECT (camera->src_vid_src), "capture-mode", 2, NULL);
+ }
+
+ /* Bring all camerabin elements to PLAYING */
+ gst_element_set_locked_state (camera->vidbin, FALSE);
+ gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PLAYING);
+ gst_element_set_locked_state (camera->vidbin, TRUE);
+
+ camera->paused = FALSE;
+ }
+ GST_DEBUG_OBJECT (camera, "pause done");
+ } else {
+ GST_WARNING ("pausing in image capture mode disabled");
+ }
+}
+
+static void
+gst_camerabin_user_res_fps (GstCameraBin * camera, gint width, gint height,
+ gint fps_n, gint fps_d)
+{
+ GstState state;
+
+ GST_INFO_OBJECT (camera, "switching resolution to %dx%d and fps to %d/%d",
+ width, height, fps_n, fps_d);
+
+ state = GST_STATE (camera);
+ gst_element_set_state (GST_ELEMENT (camera), GST_STATE_READY);
+ camera->width = width;
+ camera->height = height;
+ camera->fps_n = fps_n;
+ camera->fps_d = fps_d;
+ gst_element_set_state (GST_ELEMENT (camera), state);
+}
+
+static void
+gst_camerabin_user_image_res (GstCameraBin * camera, gint width, gint height)
+{
+ GstStructure *structure;
+ GstCaps *new_caps = NULL;
+ guint32 format = 0;
+
+ g_return_if_fail (camera != NULL);
+
+ if (width && height && camera->view_finder_caps) {
+ /* Use view finder mode caps as a basis */
+ structure = gst_caps_get_structure (camera->view_finder_caps, 0);
+
+ /* Set new resolution for image capture */
+ new_caps = gst_caps_new_simple (gst_structure_get_name (structure),
+ "width", G_TYPE_INT, width, "height", G_TYPE_INT, height, NULL);
+
+ /* Set format according to current videosrc format */
+ format = get_srcpad_current_format (camera->src_vid_src);
+ if (format) {
+ gst_caps_set_simple (new_caps, "format", GST_TYPE_FOURCC, format, NULL);
+ }
+
+ /* Set allowed framerate for the resolution. */
+ gst_camerabin_set_allowed_framerate (camera, new_caps);
+
+ /* Reset the format to match with view finder mode caps */
+ if (gst_structure_get_fourcc (structure, "format", &format)) {
+ gst_caps_set_simple (new_caps, "format", GST_TYPE_FOURCC, format, NULL);
+ }
+ }
+
+ GST_INFO_OBJECT (camera,
+ "init filter caps for image capture %" GST_PTR_FORMAT, new_caps);
+ gst_caps_replace (&camera->image_capture_caps, new_caps);
+}
+
+/* entry point to initialize the plug-in
+ * initialize the plug-in itself
+ * register the element factories and pad templates
+ * register the features
+ */
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ GST_DEBUG_CATEGORY_INIT (gst_camerabin_debug, "camerabin", 0, "CameraBin");
+
+ return gst_element_register (plugin, "camerabin",
+ GST_RANK_NONE, GST_TYPE_CAMERABIN);
+}
+
+/* this is the structure that gstreamer looks for to register plugins
+ */
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "camerabin",
+ "High level api for DC (Digital Camera) application",
+ plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)