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gstreamer/gst/camerabin/gstcamerabin.c
Thiago Santos 0999fdb82a camerabin: Check the source scene mode when creating it 
As camerabin only gets notified of the changes from the
video source element, it should query the initial value
once the source is created so it initializes itself
correctly.
2010-10-21 16:43:45 -03:00

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/*
* 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:element-camerabin
*
* 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.
*
* <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>
* <title>Example launch line</title>
* |[
* gst-launch -v -m camerabin
* ]|
* </refsect2>
* <refsect2>
* <title>Image capture</title>
* <para>
* Taking still images is initiated with the #GstCameraBin::capture-start action
* signal. Once the image has been captured, "image-captured" gst message is
* posted to the bus and capturing another image is possible. If application
* has set #GstCameraBin:preview-caps property, then a "preview-image" gst
* message is posted to bus containing preview image formatted according to
* specified caps. Eventually when image has been saved
* #GstCameraBin::image-done signal is emitted.
*
* Available resolutions can be taken from the #GstCameraBin:video-source-caps
* property. Image capture resolution can be set with
* #GstCameraBin::set-image-resolution action signal.
*
* Some video source elements implement the #GstPhotography interface, which contains
* functions and properties for setting photography parameters. One can use
* gst_bin_iterate_all_by_interface() to get a reference to it.
*
* </para>
* </refsect2>
* <refsect2>
* <title>Video capture</title>
* <para>
* Video capture is started with the #GstCameraBin::capture-start action signal
* too. In addition to image capture one can use #GstCameraBin::capture-pause to
* pause recording and #GstCameraBin::capture-stop to end recording.
*
* Available resolutions and fps can be taken from the
* #GstCameraBin:video-source-caps property.
* #GstCameraBin::set-video-resolution-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>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>
* <title>Video and image previews</title>
* <para>
* GstCameraBin contains "preview-caps" property, which is used to determine
* whether the application wants a preview image of the captured picture or
* video. When set, a GstMessage named "preview-image" will be sent. This
* message will contain a GstBuffer holding the preview image, converted
* to a format defined by those preview caps. The ownership of the preview
* image is kept in GstCameraBin, so application should ref the preview buffer
* object if it needs to use it elsewhere than in message handler.
*
* Defining preview caps is done by selecting the capturing mode first and
* then setting the property. Camerabin remembers caps separately for both
* modes, so it is not necessary to set the caps again after changing the mode.
* </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
*
* videosrc [ ! ffmpegcsp ] ! capsfilter ! crop ! scale ! capsfilter ! \
* [ video_filter ! ] out-sel name=osel ! queue name=img_q
*
* View finder:
* osel. ! in-sel name=isel ! scale ! capsfilter [ ! ffmpegcsp ] ! vfsink
*
* Image bin:
* img_q. [ ! ipp ] ! ffmpegcsp ! imageenc ! metadatamux ! filesink
*
* Video bin:
* osel. ! tee name=t ! queue ! videoenc ! videomux name=mux ! filesink
* t. ! queue ! isel.
* audiosrc ! queue ! audioconvert ! volume ! audioenc ! mux.
*
* The properties of elements are:
*
* vfsink - "sync", FALSE, "qos", FALSE, "async", 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>
#include <gst/tag/tag.h>
/* FIXME: include #include <gst/gst-i18n-plugin.h> and use _(" ") */
#include "gstcamerabin.h"
#include "gstcamerabincolorbalance.h"
#include "camerabindebug.h"
#include "camerabingeneral.h"
#include "camerabinpreview.h"
#include "gstcamerabin-marshal.h"
/*
* enum and types
*/
enum
{
/* action signals */
CAPTURE_START_SIGNAL,
CAPTURE_STOP_SIGNAL,
CAPTURE_PAUSE_SIGNAL,
SET_VIDEO_RESOLUTION_FPS_SIGNAL,
SET_IMAGE_RESOLUTION_SIGNAL,
/* emit signals */
IMG_DONE_SIGNAL,
LAST_SIGNAL
};
/*
* 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 1.0
#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"
#define CAMERABIN_MAX_VF_WIDTH 848
#define CAMERABIN_MAX_VF_HEIGHT 848
#define DEFAULT_FLAGS GST_CAMERABIN_FLAG_SOURCE_RESIZE | \
GST_CAMERABIN_FLAG_VIEWFINDER_SCALE | \
GST_CAMERABIN_FLAG_IMAGE_COLOR_CONVERSION
/* Using "bilinear" as default zoom method */
#define CAMERABIN_DEFAULT_ZOOM_METHOD 1
#define MIN_ZOOM 1.0
#define MAX_ZOOM 10.0
#define ZOOM_1X MIN_ZOOM
/* FIXME: this is v4l2camsrc specific */
#define DEFAULT_V4L2CAMSRC_DRIVER_NAME "omap3cam"
#define DEFAULT_BLOCK_VIEWFINDER FALSE
/* message names */
#define PREVIEW_MESSAGE_NAME "preview-image"
#define IMG_CAPTURED_MESSAGE_NAME "image-captured"
/*
* 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_set_flags (GstCameraBin * camera, GstCameraBinFlags flags);
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 void
camerabin_pad_blocked (GstPad * pad, gboolean blocked, gpointer user_data);
static gboolean
gst_camerabin_have_img_buffer (GstPad * pad, GstMiniObject * obj,
gpointer u_data);
static gboolean
gst_camerabin_have_vid_buffer (GstPad * pad, GstBuffer * buffer,
gpointer u_data);
static gboolean
gst_camerabin_have_queue_data (GstPad * pad, GstMiniObject * mini_obj,
gpointer u_data);
static gboolean
gst_camerabin_have_src_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);
static guint32 get_srcpad_current_format (GstElement * element);
static const GValue *gst_camerabin_find_better_framerate (GstCameraBin * camera,
GstStructure * st, const GValue * orig_framerate);
static void
gst_camerabin_update_aspect_filter (GstCameraBin * camera, GstCaps * new_caps);
static void gst_camerabin_finish_image_capture (GstCameraBin * camera);
static void gst_camerabin_adapt_image_capture (GstCameraBin * camera,
GstCaps * new_caps);
static void gst_camerabin_scene_mode_notify_cb (GObject * video_source,
GParamSpec * pspec, gpointer user_data);
static void gst_camerabin_zoom_notify_cb (GObject * video_source,
GParamSpec * pspec, gpointer user_data);
static void gst_camerabin_monitor_video_source_properties (GstCameraBin *
camera);
static void gst_camerabin_configure_format (GstCameraBin * camera,
GstCaps * caps);
static gboolean
copy_missing_fields (GQuark field_id, const GValue * value, gpointer user_data);
/*
* GObject callback functions declaration
*/
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);
/*
* 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_capture_start (GstCameraBin * camera);
static void gst_camerabin_capture_stop (GstCameraBin * camera);
static void gst_camerabin_capture_pause (GstCameraBin * camera);
static void
gst_camerabin_set_image_capture_caps (GstCameraBin * camera, gint width,
gint height);
static void
gst_camerabin_set_video_resolution_fps (GstCameraBin * camera, gint width,
gint height, gint fps_n, gint fps_d);
static void
gst_camerabin_set_image_resolution (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_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;
}
}
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_color_balance_info = {
(GInterfaceInitFunc) gst_camerabin_color_balance_init,
NULL,
NULL,
};
static const GInterfaceInfo camerabin_tagsetter_info = {
NULL,
NULL,
NULL,
};
g_type_add_interface_static (type,
GST_TYPE_IMPLEMENTS_INTERFACE, &camerabin_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);
}
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;
/* clear video update status */
camera->video_capture_caps_update = 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));
}
gst_camerabin_monitor_video_source_properties (camera);
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_INFO_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 */
if (camera->src_zoom_scale) {
g_object_set (camera->src_zoom_scale, "method",
CAMERABIN_DEFAULT_ZOOM_METHOD, NULL);
}
/* we create new caps in any way and they take ownership of the structure st */
gst_caps_replace (&camera->view_finder_caps, new_caps);
gst_caps_unref (new_caps);
/* Set caps for view finder mode */
/* This also sets zoom */
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;
/* Add application set or default video src element */
if (!(camera->src_vid_src = gst_camerabin_setup_default_element (cbin,
camera->app_vid_src, "autovideosrc", DEFAULT_VIDEOSRC))) {
camera->src_vid_src = NULL;
goto done;
} else {
if (!gst_camerabin_add_element (cbin, camera->src_vid_src))
goto done;
}
if (camera->flags & GST_CAMERABIN_FLAG_SOURCE_COLOR_CONVERSION) {
if (!gst_camerabin_create_and_add_element (cbin, "ffmpegcolorspace"))
goto done;
}
if (!(camera->src_filter =
gst_camerabin_create_and_add_element (cbin, "capsfilter")))
goto done;
if (camera->flags & GST_CAMERABIN_FLAG_SOURCE_RESIZE) {
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->app_video_filter) {
if (!gst_camerabin_add_element (cbin, camera->app_video_filter)) {
goto done;
}
}
if (!(camera->src_out_sel =
gst_camerabin_create_and_add_element (cbin, "output-selector")))
goto done;
/* Set default "driver-name" for v4l2camsrc if not set */
/* FIXME: v4l2camsrc specific */
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 (child)) {
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;
GstBin *cbin = GST_BIN (camera);
if (!(camera->view_in_sel =
gst_camerabin_create_and_add_element (cbin, "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_src = GST_PAD (pads->data);
/* Add videoscale in case we need to downscale frame for view finder */
if (camera->flags & GST_CAMERABIN_FLAG_VIEWFINDER_SCALE) {
if (!(camera->view_scale =
gst_camerabin_create_and_add_element (cbin, "videoscale"))) {
goto error;
}
/* Add capsfilter to maintain aspect ratio while scaling */
if (!(camera->aspect_filter =
gst_camerabin_create_and_add_element (cbin, "capsfilter"))) {
goto error;
}
}
if (camera->flags & GST_CAMERABIN_FLAG_VIEWFINDER_COLOR_CONVERSION) {
if (!gst_camerabin_create_and_add_element (cbin, "ffmpegcolorspace")) {
goto error;
}
}
if (camera->app_viewfinder_filter) {
if (!gst_camerabin_add_element (GST_BIN (camera),
camera->app_viewfinder_filter)) {
goto error;
}
}
/* Add application set or default video sink element */
if (!(camera->view_sink = gst_camerabin_setup_default_element (cbin,
camera->app_vf_sink, "autovideosink", DEFAULT_VIDEOSINK))) {
camera->view_sink = NULL;
goto error;
} else {
if (!gst_camerabin_add_element (cbin, camera->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 elements");
/* Create "src" elements */
if (!camerabin_create_src_elements (camera)) {
goto done;
}
camera->pad_src_img =
gst_element_get_request_pad (camera->src_out_sel, "src%d");
gst_pad_add_data_probe (camera->pad_src_img,
G_CALLBACK (gst_camerabin_have_img_buffer), camera);
/* Add queue leading to image bin */
camera->img_queue = gst_element_factory_make ("queue", "image-queue");
if (!gst_camerabin_add_element (GST_BIN (camera), camera->img_queue)) {
goto done;
}
/* To avoid deadlock, we won't restrict the image queue size */
/* FIXME: actually we would like to have some kind of restriction here (size),
but deadlocks must be handled somehow... */
g_object_set (G_OBJECT (camera->img_queue), "max-size-buffers", 0,
"max-size-bytes", 0, "max-size-time", G_GUINT64_CONSTANT (0), NULL);
g_object_set (camera->img_queue, "silent", TRUE, NULL);
camera->pad_src_queue = gst_element_get_static_pad (camera->img_queue, "src");
gst_pad_add_data_probe (camera->pad_src_queue,
G_CALLBACK (gst_camerabin_have_queue_data), camera);
/* Add image bin */
if (!gst_camerabin_add_element (GST_BIN (camera), camera->imgbin)) {
goto done;
}
camera->pad_src_view =
gst_element_get_request_pad (camera->src_out_sel, "src%d");
/* Create view finder elements */
if (!camerabin_create_view_elements (camera)) {
GST_WARNING_OBJECT (camera, "creating view finder elements failed");
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);
camera->pad_view_vid =
gst_element_get_request_pad (camera->view_in_sel, "sink%d");
link_ret =
gst_pad_link_full (unconnected_pad, camera->pad_view_vid,
GST_PAD_LINK_CHECK_CAPS);
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);
gst_object_unref (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);
gst_object_unref (camera->pad_src_vid);
camera->pad_src_vid = NULL;
}
if (camera->pad_src_img) {
gst_element_release_request_pad (camera->src_out_sel, camera->pad_src_img);
gst_object_unref (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);
/* don't unref, we have not requested it */
camera->pad_view_src = NULL;
}
if (camera->pad_src_view) {
gst_element_release_request_pad (camera->src_out_sel, camera->pad_src_view);
gst_object_unref (camera->pad_src_view);
camera->pad_src_view = NULL;
}
if (camera->pad_src_queue) {
gst_object_unref (camera->pad_src_queue);
camera->pad_src_queue = NULL;
}
/* view finder elements */
camera->view_in_sel = NULL;
camera->view_scale = NULL;
camera->aspect_filter = NULL;
camera->view_sink = 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->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)
{
GST_INFO ("cleaning");
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 application set elements */
if (camera->app_vf_sink) {
gst_object_unref (camera->app_vf_sink);
camera->app_vf_sink = NULL;
}
if (camera->app_vid_src) {
gst_object_unref (camera->app_vid_src);
camera->app_vid_src = NULL;
}
if (camera->app_video_filter) {
gst_object_unref (camera->app_video_filter);
camera->app_video_filter = NULL;
}
if (camera->app_viewfinder_filter) {
gst_object_unref (camera->app_viewfinder_filter);
camera->app_viewfinder_filter = NULL;
}
if (camera->app_preview_source_filter) {
gst_object_unref (camera->app_preview_source_filter);
camera->app_preview_source_filter = NULL;
}
if (camera->app_video_preview_source_filter) {
gst_object_unref (camera->app_video_preview_source_filter);
camera->app_video_preview_source_filter = NULL;
}
/* Free caps */
gst_caps_replace (&camera->image_capture_caps, NULL);
gst_caps_replace (&camera->view_finder_caps, NULL);
gst_caps_replace (&camera->allowed_caps, NULL);
gst_caps_replace (&camera->preview_caps, NULL);
gst_caps_replace (&camera->video_preview_caps, NULL);
gst_buffer_replace (&camera->video_preview_buffer, NULL);
if (camera->event_tags) {
gst_tag_list_free (camera->event_tags);
camera->event_tags = NULL;
}
}
/*
* gst_camerabin_image_capture_continue:
* @camera: camerabin object
* @filename: filename of the finished image
*
* Notify application that image has been saved with a signal.
*
* Returns TRUE if another image should be captured, FALSE otherwise.
*/
static gboolean
gst_camerabin_image_capture_continue (GstCameraBin * camera,
const gchar * filename)
{
gboolean cont = FALSE;
GST_DEBUG_OBJECT (camera, "emitting img_done signal, filename: %s", filename);
g_signal_emit (G_OBJECT (camera), camerabin_signals[IMG_DONE_SIGNAL], 0,
filename, &cont);
/* If the app wants to continue make sure new filename has been set */
if (cont && g_str_equal (camera->filename->str, "")) {
GST_ELEMENT_ERROR (camera, RESOURCE, NOT_FOUND,
("cannot continue capture, no filename has been set"), (NULL));
cont = FALSE;
}
return 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) {
GstState state, pending_state;
GST_DEBUG_OBJECT (camera, "setting mode: %d (old_mode=%d)",
mode, camera->mode);
/* Interrupt ongoing capture */
gst_camerabin_do_stop (camera);
camera->mode = mode;
gst_element_get_state (GST_ELEMENT (camera), &state, &pending_state, 0);
if (state == GST_STATE_PAUSED || state == GST_STATE_PLAYING ||
pending_state == GST_STATE_PAUSED
|| pending_state == GST_STATE_PLAYING) {
if (camera->active_bin) {
GST_DEBUG_OBJECT (camera, "stopping active bin");
gst_element_set_state (camera->active_bin, GST_STATE_READY);
}
if (camera->mode == MODE_IMAGE) {
GstStateChangeReturn state_ret;
camera->active_bin = camera->imgbin;
state_ret =
gst_element_set_state (camera->active_bin, GST_STATE_PAUSED);
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;
}
} else if (camera->mode == MODE_VIDEO) {
camera->active_bin = camera->vidbin;
}
gst_camerabin_reset_to_view_finder (camera);
}
}
}
/*
* gst_camerabin_set_flags:
* @camera: camerabin object
* @flags: flags for camerabin, videobin and imagebin
*
* Change camerabin capture flags.
*/
static void
gst_camerabin_set_flags (GstCameraBin * camera, GstCameraBinFlags flags)
{
g_return_if_fail (camera != NULL);
GST_DEBUG_OBJECT (camera, "setting flags: %d", flags);
GST_OBJECT_LOCK (camera);
camera->flags = flags;
GST_OBJECT_UNLOCK (camera);
gst_camerabin_video_set_flags (GST_CAMERABIN_VIDEO (camera->vidbin), flags);
gst_camerabin_image_set_flags (GST_CAMERABIN_IMAGE (camera->imgbin), flags);
}
/*
* gst_camerabin_change_filename:
* @camera: camerabin object
* @name: new filename for capture
*
* Change filename for image or video capture.
*/
static void
gst_camerabin_change_filename (GstCameraBin * camera, const gchar * name)
{
if (name == NULL)
name = "";
if (0 != strcmp (camera->filename->str, name)) {
GST_DEBUG_OBJECT (camera, "changing filename from '%s' to '%s'",
camera->filename->str, name);
g_string_assign (camera->filename, name);
}
}
static gboolean
gst_camerabin_set_videosrc_zoom (GstCameraBin * camera, gfloat zoom)
{
gboolean ret = FALSE;
/* Try with photography interface zooming */
if (GST_IS_ELEMENT (camera->src_vid_src) &&
gst_element_implements_interface (camera->src_vid_src,
GST_TYPE_PHOTOGRAPHY)) {
gst_photography_set_zoom (GST_PHOTOGRAPHY (camera->src_vid_src), zoom);
ret = TRUE;
}
return ret;
}
static gboolean
gst_camerabin_set_element_zoom (GstCameraBin * camera, gfloat zoom)
{
gint w2_crop = 0, h2_crop = 0;
GstPad *pad_zoom_sink = NULL;
gboolean ret = FALSE;
gint left = camera->base_crop_left;
gint right = camera->base_crop_right;
gint top = camera->base_crop_top;
gint bottom = camera->base_crop_bottom;
if (camera->src_zoom_crop) {
/* Update capsfilters to apply the zoom */
GST_INFO_OBJECT (camera, "zoom: %f, 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;
left += w2_crop;
right += w2_crop;
top += h2_crop;
bottom += h2_crop;
/* force number of pixels cropped from left to be even, to avoid slow code
* path on videoscale */
left &= 0xFFFE;
}
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", left, right, top,
bottom);
GST_PAD_STREAM_LOCK (pad_zoom_sink);
g_object_set (camera->src_zoom_crop, "left", left, "right", right, "top",
top, "bottom", bottom, NULL);
GST_PAD_STREAM_UNLOCK (pad_zoom_sink);
gst_object_unref (pad_zoom_sink);
ret = TRUE;
}
return ret;
}
/*
* gst_camerabin_setup_zoom:
* @camera: camerabin object
*
* Apply zoom configured to camerabin to capture.
*/
static void
gst_camerabin_setup_zoom (GstCameraBin * camera)
{
gfloat zoom;
g_return_if_fail (camera != NULL);
zoom = camera->zoom;
g_return_if_fail (zoom);
GST_INFO_OBJECT (camera, "setting zoom %f", zoom);
if (gst_camerabin_set_videosrc_zoom (camera, zoom)) {
gst_camerabin_set_element_zoom (camera, ZOOM_1X);
GST_INFO_OBJECT (camera, "zoom set using videosrc");
} else if (gst_camerabin_set_element_zoom (camera, zoom)) {
GST_INFO_OBJECT (camera, "zoom set using gst elements");
} else {
GST_INFO_OBJECT (camera, "setting zoom failed");
}
}
/*
* 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;
GstElement *videosrc;
g_return_val_if_fail (camera != NULL, NULL);
videosrc = camera->src_vid_src ? camera->src_vid_src : camera->app_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 NULL state */
if (state == GST_STATE_NULL) {
GST_DEBUG_OBJECT (camera, "setting videosrc to ready temporarily");
peer_pad = gst_pad_get_peer (pad);
if (peer_pad) {
gst_pad_unlink (pad, peer_pad);
}
/* Set videosrc to READY to open video device */
gst_element_set_locked_state (videosrc, TRUE);
gst_element_set_state (videosrc, GST_STATE_READY);
}
camera->allowed_caps = gst_pad_get_caps (pad);
/* Restore state and re-link if necessary */
if (state == GST_STATE_NULL) {
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);
if (peer_pad) {
gst_pad_link_full (pad, peer_pad, GST_PAD_LINK_CHECK_CAPS);
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);
}
GST_DEBUG_OBJECT (camera, "allowed caps:%" GST_PTR_FORMAT, caps);
failed:
return caps;
}
/*
* gst_camerabin_send_img_queue_event:
* @camera: camerabin object
* @event: event to be sent
*
* Send the given event to image queue.
*/
static void
gst_camerabin_send_img_queue_event (GstCameraBin * camera, GstEvent * event)
{
GstPad *queue_sink;
g_return_if_fail (camera != NULL);
g_return_if_fail (event != NULL);
queue_sink = gst_element_get_static_pad (camera->img_queue, "sink");
gst_pad_send_event (queue_sink, event);
gst_object_unref (queue_sink);
}
/*
* gst_camerabin_send_img_queue_custom_event:
* @camera: camerabin object
* @ev_struct: event structure to be sent
*
* Generate and send a custom event to image queue.
*/
static void
gst_camerabin_send_img_queue_custom_event (GstCameraBin * camera,
GstStructure * ev_struct)
{
GstEvent *event;
g_return_if_fail (camera != NULL);
g_return_if_fail (ev_struct != NULL);
event = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, ev_struct);
gst_camerabin_send_img_queue_event (camera, event);
}
/*
* 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;
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);
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,
GST_TAG_CAPTURING_DIGITAL_ZOOM_RATIO, (gdouble) camera->zoom, 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 (!g_ascii_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 (!g_ascii_strcasecmp (channel->label, "contrast")) {
/* 0 = Normal, 1 = Soft, 2 = Hard */
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_CAPTURING_CONTRAST,
(cur_value == mid_value) ? "normal" : ((cur_value < mid_value)
? "soft" : "hard"), NULL);
} else if (!g_ascii_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,
GST_TAG_CAPTURING_GAIN_ADJUSTMENT,
(cur_value == mid_value) ? "normal" : ((cur_value <
mid_value) ? "low-gain-up" : "low-gain-down"), NULL);
} else if (!g_ascii_strcasecmp (channel->label, "saturation")) {
/* 0 = Normal, 1 = Low, 2 = High */
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_CAPTURING_SATURATION,
(cur_value == mid_value) ? "normal" : ((cur_value < mid_value)
? "low-saturation" : "high-saturation"), 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 */
if (camera->active_bin == camera->vidbin) {
gst_camerabin_rewrite_tags_to_bin (GST_BIN (camera->active_bin), list);
} else {
/* Image tags need to be sent as a serialized event into image queue */
GstEvent *tagevent = gst_event_new_tag (gst_tag_list_copy (list));
gst_camerabin_send_img_queue_event (camera, tagevent);
}
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)
{
GST_INFO_OBJECT (camera, "new_caps:%" GST_PTR_FORMAT, new_caps);
gst_camerabin_configure_format (camera, new_caps);
/* Update zoom */
gst_camerabin_setup_zoom (camera);
/* Update capsfilters */
g_object_set (G_OBJECT (camera->src_filter), "caps", new_caps, NULL);
if (camera->src_zoom_filter)
g_object_set (G_OBJECT (camera->src_zoom_filter), "caps", new_caps, NULL);
gst_camerabin_update_aspect_filter (camera, new_caps);
GST_INFO_OBJECT (camera, "udpated");
}
/*
* img_capture_prepared:
* @data: camerabin object
* @caps: caps describing the prepared image format
*
* Callback which is called after image capture has been prepared.
*/
static void
img_capture_prepared (gpointer data, GstCaps * caps)
{
GstCameraBin *camera = GST_CAMERABIN (data);
GST_INFO_OBJECT (camera, "image capture prepared");
/* It is possible we are about to get something else that we requested */
if (!gst_caps_is_equal (camera->image_capture_caps, caps)) {
gst_camerabin_adapt_image_capture (camera, caps);
} else {
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_start_image_capture:
* @camera: camerabin object
*
* Initiates image capture.
*/
static void
gst_camerabin_start_image_capture (GstCameraBin * camera)
{
gboolean wait_for_prepare = FALSE, ret = FALSE;
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);
/* 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);
}
if (!camera->image_capture_caps || camera->image_capture_caps_update) {
if (camera->image_capture_width && camera->image_capture_height) {
/* Resolution is set, but it isn't in use yet */
gst_camerabin_set_image_capture_caps (camera,
camera->image_capture_width, camera->image_capture_height);
} else {
/* Capture resolution not set. Use viewfinder resolution */
camera->image_capture_caps = gst_caps_copy (camera->view_finder_caps);
camera->image_capture_caps_update = FALSE;
}
}
/* Start preparations for image capture */
GST_DEBUG_OBJECT (camera, "prepare image capture caps %" GST_PTR_FORMAT,
camera->image_capture_caps);
ret =
gst_photography_prepare_for_capture (GST_PHOTOGRAPHY
(camera->src_vid_src), (GstPhotoCapturePrepared) img_capture_prepared,
camera->image_capture_caps, camera);
camera->capturing = TRUE;
g_mutex_unlock (camera->capture_mutex);
}
if (!wait_for_prepare) {
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;
ret = TRUE;
g_mutex_unlock (camera->capture_mutex);
}
if (!ret) {
GST_WARNING_OBJECT (camera, "starting image capture failed");
}
}
/*
* FIXME ideally a caps renegotiation is better here
*/
static void
reset_video_capture_caps (GstCameraBin * camera)
{
GstState state, pending;
GstPad *activepad = NULL;
GST_INFO_OBJECT (camera, "switching resolution to %dx%d and fps to %d/%d",
camera->width, camera->height, camera->fps_n, camera->fps_d);
/* Interrupt ongoing capture */
gst_camerabin_do_stop (camera);
gst_element_get_state (GST_ELEMENT (camera), &state, &pending, 0);
if (state == GST_STATE_PAUSED || state == GST_STATE_PLAYING) {
GST_INFO_OBJECT (camera,
"changing to READY to initialize videosrc with new format");
g_object_get (G_OBJECT (camera->src_out_sel), "active-pad", &activepad,
NULL);
gst_element_set_state (GST_ELEMENT (camera), GST_STATE_READY);
}
if (pending != GST_STATE_VOID_PENDING) {
GST_LOG_OBJECT (camera, "restoring pending state: %s",
gst_element_state_get_name (pending));
state = pending;
}
/* Re-set the active pad since switching camerabin to READY state clears this
* setting in output-selector */
if (activepad) {
GST_INFO_OBJECT (camera, "re-setting active pad in output-selector");
g_object_set (G_OBJECT (camera->src_out_sel), "active-pad", activepad,
NULL);
}
gst_element_set_state (GST_ELEMENT (camera), state);
}
/*
* 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");
/* check if need to update video capture caps */
if (camera->video_capture_caps_update) {
reset_video_capture_caps (camera);
}
gst_camerabin_rewrite_tags (camera);
/* Pause the pipeline in order to distribute new clock in paused_to_playing */
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);
camera->capturing = TRUE;
g_mutex_unlock (camera->capture_mutex);
gst_element_set_locked_state (camera->vidbin, FALSE);
/* ensure elements activated before feeding data into it */
state_ret = gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PAUSED);
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);
}
/* videobin will not go to playing if file is not writable */
if (gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PLAYING) ==
GST_STATE_CHANGE_FAILURE) {
GST_ELEMENT_ERROR (camera, CORE, STATE_CHANGE,
("Setting videobin to PLAYING failed"), (NULL));
gst_element_set_state (camera->vidbin, GST_STATE_NULL);
gst_element_set_locked_state (camera->vidbin, TRUE);
g_mutex_lock (camera->capture_mutex);
camera->capturing = FALSE;
g_mutex_unlock (camera->capture_mutex);
gst_camerabin_reset_to_view_finder (camera);
} else {
gst_element_set_locked_state (camera->vidbin, TRUE);
}
} 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);
if (!camera->eos_handled) {
/* 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);
/* Block viewfinder after capturing if requested by application */
GST_OBJECT_LOCK (camera);
if (camera->block_viewfinder_trigger) {
gst_pad_set_blocked_async (camera->pad_src_view, TRUE,
(GstPadBlockCallback) camerabin_pad_blocked, camera);
}
GST_OBJECT_UNLOCK (camera);
camera->eos_handled = TRUE;
} else {
GST_INFO_OBJECT (camera, "dropping duplicate EOS");
}
}
/*
* camerabin_pad_blocked:
* @pad: pad to block/unblock
* @blocked: TRUE to block, FALSE to unblock
* @u_data: camera bin object
*
* Callback function for blocking a pad.
*/
static void
camerabin_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));
}
/*
* gst_camerabin_send_preview:
* @camera: camerabin object
* @buffer: received buffer
*
* Convert given buffer to desired preview format and send is as a #GstMessage
* to application.
*
* Returns: TRUE always
*/
static gboolean
gst_camerabin_send_preview (GstCameraBin * camera, GstBuffer * buffer)
{
GstElement *pipeline;
GstBuffer *prev = NULL;
GstStructure *s;
GstMessage *msg;
gboolean ret = FALSE;
GST_DEBUG_OBJECT (camera, "creating preview");
pipeline = (camera->mode == MODE_IMAGE) ?
camera->preview_pipeline : camera->video_preview_pipeline;
prev = gst_camerabin_preview_convert (camera, pipeline, buffer);
GST_DEBUG_OBJECT (camera, "preview created: %p", prev);
if (prev) {
s = gst_structure_new (PREVIEW_MESSAGE_NAME,
"buffer", GST_TYPE_BUFFER, prev, NULL);
gst_buffer_unref (prev);
msg = gst_message_new_element (GST_OBJECT (camera), s);
GST_DEBUG_OBJECT (camera, "sending message with preview image");
if (gst_element_post_message (GST_ELEMENT (camera), msg) == FALSE) {
GST_WARNING_OBJECT (camera,
"This element has no bus, therefore no message sent!");
}
ret = TRUE;
}
return ret;
}
/*
* 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 queue.
* Generates and sends preview image as gst message if requested.
*/
static gboolean
gst_camerabin_have_img_buffer (GstPad * pad, GstMiniObject * obj,
gpointer u_data)
{
GstCameraBin *camera = (GstCameraBin *) u_data;
if (GST_IS_BUFFER (obj)) {
GstBuffer *buffer = GST_BUFFER_CAST (obj);
GstStructure *fn_ev_struct = NULL;
gboolean ret = TRUE;
GstPad *os_sink = NULL;
GST_LOG ("got buffer %p with size %d", 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;
}
if (camera->preview_caps) {
gst_camerabin_send_preview (camera, buffer);
}
gst_camerabin_rewrite_tags (camera);
/* Send a custom event which tells the filename to image queue */
/* NOTE: This needs to be THE FIRST event to be sent to queue for
every image. It triggers imgbin state change to PLAYING. */
fn_ev_struct = gst_structure_new ("img-filename",
"filename", G_TYPE_STRING, camera->filename->str, NULL);
GST_DEBUG_OBJECT (camera, "sending filename event to image queue");
gst_camerabin_send_img_queue_custom_event (camera, fn_ev_struct);
/* Add buffer probe to outputselector's sink pad. It sends
EOS event to image queue. */
os_sink = gst_element_get_static_pad (camera->src_out_sel, "sink");
camera->image_captured_id = gst_pad_add_buffer_probe (os_sink,
G_CALLBACK (gst_camerabin_have_src_buffer), camera);
gst_object_unref (os_sink);
done:
/* HACK: v4l2camsrc changes to view finder resolution automatically
after one captured still image */
gst_camerabin_finish_image_capture (camera);
GST_DEBUG_OBJECT (camera, "image captured, switching to viewfinder");
gst_camerabin_reset_to_view_finder (camera);
GST_DEBUG_OBJECT (camera, "switched back to viewfinder");
return TRUE;
} else if (GST_IS_EVENT (obj)) {
GstEvent *event = GST_EVENT_CAST (obj);
GST_DEBUG_OBJECT (camera, "Received event in image pipeline");
/* forward tag events to preview pipeline */
if (camera->preview_caps && GST_EVENT_TYPE (event) == GST_EVENT_TAG) {
GstElement *pipeline;
pipeline = (camera->mode == MODE_IMAGE) ?
camera->preview_pipeline : camera->video_preview_pipeline;
gst_camerabin_preview_send_event (camera, pipeline,
gst_event_ref (event));
}
}
return TRUE;
}
/*
* 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->video_preview_caps &&
!camera->video_preview_buffer && !camera->stop_requested) {
GST_DEBUG ("storing video preview %p", buffer);
camera->video_preview_buffer = gst_buffer_copy (buffer);
}
if (G_UNLIKELY (camera->stop_requested)) {
gst_camerabin_send_video_eos (camera);
ret = FALSE; /* Drop buffer */
}
return ret;
}
/*
* gst_camerabin_have_src_buffer:
* @pad: output-selector sink pad which receives frames from video source
* @buffer: buffer pushed to the pad
* @u_data: camerabin object
*
* Buffer probe for sink pad. It sends custom eos event to image queue and
* notifies application by sending a "image-captured" message to GstBus.
* This probe is installed after image has been captured and it disconnects
* itself after EOS has been sent.
*/
static gboolean
gst_camerabin_have_src_buffer (GstPad * pad, GstBuffer * buffer,
gpointer u_data)
{
GstCameraBin *camera = (GstCameraBin *) u_data;
GstMessage *msg;
GST_LOG_OBJECT (camera, "got image buffer %p with size %d",
buffer, GST_BUFFER_SIZE (buffer));
g_mutex_lock (camera->capture_mutex);
camera->capturing = FALSE;
g_cond_signal (camera->cond);
g_mutex_unlock (camera->capture_mutex);
msg = gst_message_new_element (GST_OBJECT (camera),
gst_structure_new (IMG_CAPTURED_MESSAGE_NAME, NULL));
GST_DEBUG_OBJECT (camera, "sending 'image captured' message");
if (gst_element_post_message (GST_ELEMENT (camera), msg) == FALSE) {
GST_WARNING_OBJECT (camera,
"This element has no bus, therefore no message sent!");
}
/* We can't send real EOS event, since it would switch the image queue
into "draining mode". Therefore we send our own custom eos and
catch & drop it later in queue's srcpad data probe */
GST_DEBUG_OBJECT (camera, "sending img-eos to image queue");
gst_camerabin_send_img_queue_custom_event (camera,
gst_structure_new ("img-eos", NULL));
/* Prevent video source from pushing frames until we want them */
GST_OBJECT_LOCK (camera);
if (camera->block_viewfinder_trigger) {
gst_pad_set_blocked_async (camera->pad_src_view, TRUE,
(GstPadBlockCallback) camerabin_pad_blocked, camera);
}
GST_OBJECT_UNLOCK (camera);
/* our work is done, disconnect */
gst_pad_remove_buffer_probe (pad, camera->image_captured_id);
return TRUE;
}
/*
* gst_camerabin_have_queue_data:
* @pad: image queue src pad leading to image bin
* @mini_obj: buffer or event pushed to the pad
* @u_data: camerabin object
*
* Buffer probe for image queue src pad leading to image bin. It sets imgbin
* into PLAYING mode when image buffer is passed to it. This probe also
* monitors our internal custom events and handles them accordingly.
*/
static gboolean
gst_camerabin_have_queue_data (GstPad * pad, GstMiniObject * mini_obj,
gpointer u_data)
{
GstCameraBin *camera = (GstCameraBin *) u_data;
gboolean ret = TRUE;
if (GST_IS_BUFFER (mini_obj)) {
GstEvent *tagevent;
GST_LOG_OBJECT (camera, "queue sending image buffer to imagebin");
tagevent = gst_event_new_tag (gst_tag_list_copy (camera->event_tags));
gst_element_send_event (camera->imgbin, tagevent);
gst_tag_list_free (camera->event_tags);
camera->event_tags = gst_tag_list_new ();
} else if (GST_IS_EVENT (mini_obj)) {
const GstStructure *evs;
GstEvent *event;
event = GST_EVENT_CAST (mini_obj);
evs = gst_event_get_structure (event);
GST_LOG_OBJECT (camera, "got event %s", GST_EVENT_TYPE_NAME (event));
if (GST_EVENT_TYPE (event) == GST_EVENT_TAG) {
GstTagList *tlist;
GST_DEBUG_OBJECT (camera, "queue sending taglist to image pipeline");
gst_event_parse_tag (event, &tlist);
gst_tag_list_insert (camera->event_tags, tlist, GST_TAG_MERGE_REPLACE);
ret = FALSE;
} else if (evs && gst_structure_has_name (evs, "img-filename")) {
const gchar *fname;
GST_DEBUG_OBJECT (camera, "queue setting image filename to imagebin");
fname = gst_structure_get_string (evs, "filename");
g_object_set (G_OBJECT (camera->imgbin), "filename", fname, NULL);
/* imgbin fails to start unless the filename is set or file
cannot be written */
if (gst_element_set_state (camera->imgbin, GST_STATE_PLAYING) ==
GST_STATE_CHANGE_FAILURE) {
GST_ELEMENT_ERROR (camera, CORE, STATE_CHANGE,
("Setting imagebin to PLAYING failed"), (NULL));
gst_element_set_state (camera->imgbin, GST_STATE_NULL);
} else {
GST_LOG_OBJECT (camera, "Set imagebin to PLAYING");
}
ret = FALSE;
} else if (evs && gst_structure_has_name (evs, "img-eos")) {
GST_DEBUG_OBJECT (camera, "queue sending EOS to image pipeline");
gst_pad_set_blocked_async (camera->pad_src_queue, TRUE,
(GstPadBlockCallback) camerabin_pad_blocked, camera);
gst_element_send_event (camera->imgbin, gst_event_new_eos ());
ret = FALSE;
}
}
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");
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);
}
/* Set video bin to READY state */
if (camera->active_bin == camera->vidbin) {
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->stop_requested = FALSE;
camera->paused = FALSE;
camera->eos_handled = FALSE;
/* 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;
if (camera->video_preview_caps && camera->video_preview_buffer) {
gst_camerabin_send_preview (camera, camera->video_preview_buffer);
gst_buffer_unref (camera->video_preview_buffer);
camera->video_preview_buffer = NULL;
}
/* 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: filename of the recently saved image
*
* Default handler for #GstCameraBin::image-done signal,
* stops always capture.
*
* Returns: FALSE always
*/
static gboolean
gst_camerabin_default_signal_img_done (GstCameraBin * camera,
const gchar * 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, *tmp_caps = NULL;
const GValue *framerate = NULL;
guint caps_size, i;
guint32 format = 0;
GST_INFO_OBJECT (camera, "filter caps:%" GST_PTR_FORMAT, filter_caps);
structure = gst_structure_copy (gst_caps_get_structure (filter_caps, 0));
/* Set fourcc format according to current videosrc format */
format = get_srcpad_current_format (camera->src_vid_src);
if (format) {
GST_DEBUG_OBJECT (camera,
"using format %" GST_FOURCC_FORMAT " for matching",
GST_FOURCC_ARGS (format));
gst_structure_set (structure, "format", GST_TYPE_FOURCC, format, NULL);
} else {
GST_DEBUG_OBJECT (camera, "not matching against fourcc format");
gst_structure_remove_field (structure, "format");
}
tmp_caps = gst_caps_new_full (structure, NULL);
/* Get supported caps from video src that matches with new filter caps */
allowed_caps = gst_camerabin_get_allowed_input_caps (camera);
intersect = gst_caps_intersect (allowed_caps, tmp_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);
}
/* Set found frame rate to original caps */
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);
}
/* Unref helper caps */
if (allowed_caps) {
gst_caps_unref (allowed_caps);
}
if (intersect) {
gst_caps_unref (intersect);
}
if (tmp_caps) {
gst_caps_unref (tmp_caps);
}
}
/**
* 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 in %" GST_PTR_FORMAT, st);
comparison = GST_VALUE_LESS_THAN;
} else {
GST_LOG_OBJECT (camera, "finding max framerate in %" GST_PTR_FORMAT, st);
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;
}
/*
* gst_camerabin_update_aspect_filter:
* @camera: camerabin object
* @new_caps: new caps of next buffers arriving to view finder sink element
*
* Updates aspect ratio capsfilter to maintain aspect ratio, if we need to
* scale frames for showing them in view finder.
*/
static void
gst_camerabin_update_aspect_filter (GstCameraBin * camera, GstCaps * new_caps)
{
if (camera->flags & GST_CAMERABIN_FLAG_VIEWFINDER_SCALE) {
GstCaps *sink_caps, *ar_caps;
GstStructure *st;
gint in_w = 0, in_h = 0, sink_w = 0, sink_h = 0, target_w = 0, target_h = 0;
gdouble ratio_w, ratio_h;
GstPad *sink_pad;
const GValue *range;
sink_pad = gst_element_get_static_pad (camera->view_sink, "sink");
if (sink_pad) {
sink_caps = gst_pad_get_caps (sink_pad);
gst_object_unref (sink_pad);
if (sink_caps) {
if (!gst_caps_is_any (sink_caps)) {
GST_DEBUG_OBJECT (camera, "sink element caps %" GST_PTR_FORMAT,
sink_caps);
/* Get maximum resolution that view finder sink accepts */
st = gst_caps_get_structure (sink_caps, 0);
if (gst_structure_has_field_typed (st, "width", GST_TYPE_INT_RANGE)) {
range = gst_structure_get_value (st, "width");
sink_w = gst_value_get_int_range_max (range);
}
if (gst_structure_has_field_typed (st, "height", GST_TYPE_INT_RANGE)) {
range = gst_structure_get_value (st, "height");
sink_h = gst_value_get_int_range_max (range);
}
GST_DEBUG_OBJECT (camera, "sink element accepts max %dx%d", sink_w,
sink_h);
/* Get incoming frames' resolution */
if (sink_h && sink_w) {
st = gst_caps_get_structure (new_caps, 0);
gst_structure_get_int (st, "width", &in_w);
gst_structure_get_int (st, "height", &in_h);
GST_DEBUG_OBJECT (camera, "new caps with %dx%d", in_w, in_h);
}
}
gst_caps_unref (sink_caps);
}
}
/* If we get bigger frames than view finder sink accepts, then we scale.
If we scale we need to adjust aspect ratio capsfilter caps in order
to maintain aspect ratio while scaling. */
if (in_w && in_h && (in_w > sink_w || in_h > sink_h)) {
ratio_w = (gdouble) sink_w / in_w;
ratio_h = (gdouble) sink_h / in_h;
if (ratio_w < ratio_h) {
target_w = sink_w;
target_h = (gint) (ratio_w * in_h);
} else {
target_w = (gint) (ratio_h * in_w);
target_h = sink_h;
}
GST_DEBUG_OBJECT (camera, "setting %dx%d filter to maintain aspect ratio",
target_w, target_h);
ar_caps = gst_caps_copy (new_caps);
gst_caps_set_simple (ar_caps, "width", G_TYPE_INT, target_w, "height",
G_TYPE_INT, target_h, NULL);
} else {
GST_DEBUG_OBJECT (camera, "no scaling");
ar_caps = new_caps;
}
GST_DEBUG_OBJECT (camera, "aspect ratio filter caps %" GST_PTR_FORMAT,
ar_caps);
g_object_set (G_OBJECT (camera->aspect_filter), "caps", ar_caps, NULL);
if (ar_caps != new_caps)
gst_caps_unref (ar_caps);
}
}
/*
* gst_camerabin_finish_image_capture:
* @camera: camerabin object
*
* Perform finishing operations after image capture is done and
* returning back to view finder mode.
*/
static void
gst_camerabin_finish_image_capture (GstCameraBin * camera)
{
if (camera->image_capture_caps) {
/* If we used specific caps for image capture we need to
restore the caps and zoom/crop for view finder mode */
if (camera->src_zoom_crop) {
GST_DEBUG_OBJECT (camera, "resetting crop in camerabin");
g_object_set (camera->src_zoom_crop, "left", 0, "right", 0,
"top", 0, "bottom", 0, NULL);
}
camera->base_crop_left = 0;
camera->base_crop_right = 0;
camera->base_crop_top = 0;
camera->base_crop_bottom = 0;
gst_camerabin_set_capsfilter_caps (camera, camera->view_finder_caps);
}
}
/*
* gst_camerabin_adapt_image_capture:
* @camera: camerabin object
* @in_caps: caps object that describes incoming image format
*
* Adjust capsfilters and crop according image capture caps if necessary.
* The captured image format from video source might be different from
* what application requested, so we can try to fix that in camerabin.
*
*/
static void
gst_camerabin_adapt_image_capture (GstCameraBin * camera, GstCaps * in_caps)
{
GstStructure *in_st, *new_st, *req_st;
gint in_width = 0, in_height = 0, req_width = 0, req_height = 0, crop = 0;
gdouble ratio_w, ratio_h;
GstCaps *filter_caps = NULL;
GST_LOG_OBJECT (camera, "in caps: %" GST_PTR_FORMAT, in_caps);
GST_LOG_OBJECT (camera, "requested caps: %" GST_PTR_FORMAT,
camera->image_capture_caps);
in_st = gst_caps_get_structure (in_caps, 0);
gst_structure_get_int (in_st, "width", &in_width);
gst_structure_get_int (in_st, "height", &in_height);
req_st = gst_caps_get_structure (camera->image_capture_caps, 0);
gst_structure_get_int (req_st, "width", &req_width);
gst_structure_get_int (req_st, "height", &req_height);
GST_INFO_OBJECT (camera, "we requested %dx%d, and got %dx%d", req_width,
req_height, in_width, in_height);
new_st = gst_structure_copy (req_st);
/* If new fields have been added, we need to copy them */
gst_structure_foreach (in_st, copy_missing_fields, new_st);
if (!(camera->flags & GST_CAMERABIN_FLAG_SOURCE_RESIZE)) {
GST_DEBUG_OBJECT (camera,
"source-resize flag disabled, unable to adapt resolution");
gst_structure_set (new_st, "width", G_TYPE_INT, in_width, "height",
G_TYPE_INT, in_height, NULL);
}
GST_LOG_OBJECT (camera, "new image capture caps: %" GST_PTR_FORMAT, new_st);
/* Crop if requested aspect ratio differs from incoming frame aspect ratio */
if (camera->src_zoom_crop) {
ratio_w = (gdouble) in_width / req_width;
ratio_h = (gdouble) in_height / req_height;
if (ratio_w < ratio_h) {
crop = in_height - (req_height * ratio_w);
camera->base_crop_top = crop / 2;
camera->base_crop_bottom = crop / 2;
} else {
crop = in_width - (req_width * ratio_h);
camera->base_crop_left = crop / 2;
camera->base_crop_right += crop / 2;
}
GST_INFO_OBJECT (camera,
"setting base crop: left:%d, right:%d, top:%d, bottom:%d",
camera->base_crop_left, camera->base_crop_right, camera->base_crop_top,
camera->base_crop_bottom);
g_object_set (G_OBJECT (camera->src_zoom_crop), "top",
camera->base_crop_top, "bottom", camera->base_crop_bottom, "left",
camera->base_crop_left, "right", camera->base_crop_right, NULL);
}
/* Update capsfilters */
gst_caps_replace (&camera->image_capture_caps,
gst_caps_new_full (new_st, NULL));
gst_camerabin_set_capsfilter_caps (camera, camera->image_capture_caps);
/* Adjust the capsfilter before crop and videoscale elements if necessary */
if (in_width == camera->width && in_height == camera->height) {
GST_DEBUG_OBJECT (camera, "no adaptation with resolution needed");
} else {
GST_DEBUG_OBJECT (camera,
"changing %" GST_PTR_FORMAT " from %dx%d to %dx%d", camera->src_filter,
camera->width, camera->height, in_width, in_height);
/* Apply the width and height to filter caps */
g_object_get (G_OBJECT (camera->src_filter), "caps", &filter_caps, NULL);
filter_caps = gst_caps_make_writable (filter_caps);
gst_caps_set_simple (filter_caps, "width", G_TYPE_INT, in_width, "height",
G_TYPE_INT, in_height, NULL);
g_object_set (G_OBJECT (camera->src_filter), "caps", filter_caps, NULL);
gst_caps_unref (filter_caps);
}
}
/*
* gst_camerabin_handle_scene_mode:
* @camera: camerabin object
* scene_mode: scene mode
*
* Handle scene mode if night mode was selected/deselected in video-source
*
*/
static void
gst_camerabin_handle_scene_mode (GstCameraBin * camera, GstSceneMode scene_mode)
{
if (scene_mode == GST_PHOTOGRAPHY_SCENE_MODE_NIGHT) {
if (!camera->night_mode) {
GST_DEBUG ("enabling night mode, lowering fps");
/* Make camerabin select the lowest allowed frame rate */
camera->night_mode = TRUE;
/* Remember frame rate before setting night mode */
camera->pre_night_fps_n = camera->fps_n;
camera->pre_night_fps_d = camera->fps_d;
g_signal_emit_by_name (camera, "set-video-resolution-fps", camera->width,
camera->height, 0, 1, NULL);
} else {
GST_DEBUG ("night mode already enabled");
}
} else {
if (camera->night_mode) {
GST_DEBUG ("disabling night mode, restoring fps to %d/%d",
camera->pre_night_fps_n, camera->pre_night_fps_d);
camera->night_mode = FALSE;
g_signal_emit_by_name (camera, "set-video-resolution-fps", camera->width,
camera->height, camera->pre_night_fps_n, camera->pre_night_fps_d, 0);
}
}
}
/*
* gst_camerabin_scene_mode_notify_cb:
* @video_source: videosrc object
* @pspec: GParamSpec for property
* @user_data: camerabin object
*
* Update framerate if scene mode was updated in video-source
*
*/
static void
gst_camerabin_scene_mode_notify_cb (GObject * video_source, GParamSpec * pspec,
gpointer user_data)
{
GstSceneMode scene_mode;
const gchar *name = g_param_spec_get_name (pspec);
GstCameraBin *camera = GST_CAMERABIN (user_data);
g_object_get (video_source, name, &scene_mode, NULL);
gst_camerabin_handle_scene_mode (camera, scene_mode);
}
/*
* gst_camerabin_zoom_notify_cb:
* @video_source: videosrc object
* @pspec: GParamSpec for property
* @user_data: camerabin object
*
* Update zoom value if video-source updated its zoom
*
*/
static void
gst_camerabin_zoom_notify_cb (GObject * video_source, GParamSpec * pspec,
gpointer user_data)
{
gfloat zoom;
const gchar *name = g_param_spec_get_name (pspec);
GstCameraBin *camera = GST_CAMERABIN (user_data);
g_object_get (video_source, name, &zoom, NULL);
camera->zoom = zoom;
g_object_notify (G_OBJECT (camera), "zoom");
}
/*
* gst_camerabin_monitor_video_source_properties:
* @camera: camerabin object
*
* Monitor notify signals from video source photography interface
* property scene mode.
*
*/
static void
gst_camerabin_monitor_video_source_properties (GstCameraBin * camera)
{
GST_DEBUG_OBJECT (camera, "checking for photography interface support");
if (GST_IS_ELEMENT (camera->src_vid_src) &&
gst_element_implements_interface (camera->src_vid_src,
GST_TYPE_PHOTOGRAPHY)) {
gint scene_mode;
GST_DEBUG_OBJECT (camera,
"connecting to %" GST_PTR_FORMAT " - notify::scene-mode",
camera->src_vid_src);
g_signal_connect (G_OBJECT (camera->src_vid_src), "notify::scene-mode",
(GCallback) gst_camerabin_scene_mode_notify_cb, camera);
g_object_get (G_OBJECT (camera->src_vid_src), "scene-mode", &scene_mode,
NULL);
camera->night_mode = scene_mode == GST_PHOTOGRAPHY_SCENE_MODE_NIGHT;
GST_DEBUG_OBJECT (camera,
"connecting to %" GST_PTR_FORMAT " - notify::zoom",
camera->src_vid_src);
g_signal_connect (G_OBJECT (camera->src_vid_src), "notify::zoom",
(GCallback) gst_camerabin_zoom_notify_cb, camera);
}
}
/*
* gst_camerabin_configure_format:
* @camera: camerabin object
* @caps: caps describing new format
*
* Configure internal video format for camerabin.
*
*/
static void
gst_camerabin_configure_format (GstCameraBin * camera, GstCaps * caps)
{
GstStructure *st;
st = gst_caps_get_structure (caps, 0);
gst_structure_get_int (st, "width", &camera->width);
gst_structure_get_int (st, "height", &camera->height);
if (gst_structure_has_field_typed (st, "framerate", GST_TYPE_FRACTION)) {
gst_structure_get_fraction (st, "framerate", &camera->fps_n,
&camera->fps_d);
}
}
static gboolean
copy_missing_fields (GQuark field_id, const GValue * value, gpointer user_data)
{
GstStructure *st = (GstStructure *) user_data;
const GValue *val = gst_structure_id_get_value (st, field_id);
if (G_UNLIKELY (val == NULL)) {
gst_structure_id_set_value (st, field_id, value);
}
return TRUE;
}
/*
* gst_camerabin_change_viewfinder_blocking:
* @camera: camerabin object
* @blocked: new viewfinder blocking state
*
* Handle viewfinder blocking parameter change.
*/
static void
gst_camerabin_change_viewfinder_blocking (GstCameraBin * camera,
gboolean blocked)
{
gboolean old_value;
GST_OBJECT_LOCK (camera);
old_value = camera->block_viewfinder_prop;
camera->block_viewfinder_prop = blocked;
if (blocked == FALSE) {
camera->block_viewfinder_trigger = FALSE;
}
GST_OBJECT_UNLOCK (camera);
/* "block_viewfinder_prop" is now set and will be checked after capture */
GST_DEBUG_OBJECT (camera, "viewfinder blocking set to %d, was %d",
camera->block_viewfinder_prop, old_value);
if (old_value == blocked)
return;
if (!blocked && camera->pad_src_view
&& gst_pad_is_blocked (camera->pad_src_view)) {
/* Unblock viewfinder: the pad is blocked and we need to unblock it */
gst_pad_set_blocked_async (camera->pad_src_view, FALSE,
(GstPadBlockCallback) camerabin_pad_blocked, camera);
}
}
/*
* GObject callback functions implementation
*/
static void
gst_camerabin_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
gst_tag_register_musicbrainz_tags ();
gst_element_class_set_details_simple (element_class, "Camera Bin",
"Generic/Bin/Camera",
"Handle lot of features present in DSC",
"Nokia Corporation <multimedia@maemo.org>, "
"Edgard Lima <edgard.lima@indt.org.br>");
}
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 | G_PARAM_STATIC_STRINGS));
/**
* 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 | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:flags
*
* Control the behaviour of camerabin.
*/
g_object_class_install_property (gobject_class, ARG_FLAGS,
g_param_spec_flags ("flags", "Flags", "Flags to control behaviour",
GST_TYPE_CAMERABIN_FLAGS, DEFAULT_FLAGS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* 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 | G_PARAM_STATIC_STRINGS));
/**
* 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_float ("zoom", "Zoom",
"The zoom. 1.0 for 1x, 2.0 for 2x and so on",
MIN_ZOOM, MAX_ZOOM, DEFAULT_ZOOM,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:image-post-processing:
*
* 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 ("image-post-processing",
"Image post processing element",
"Image Post-Processing GStreamer element (default is NULL)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:image-encoder:
*
* 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 ("image-encoder", "Image encoder",
"Image encoder GStreamer element (default is jpegenc)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:video-post-processing:
*
* 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 ("video-post-processing",
"Video post processing element",
"Video post processing GStreamer element (default is NULL)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:video-encoder:
*
* 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 ("video-encoder", "Video encoder",
"Video encoder GStreamer element (default is theoraenc)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:audio-encoder:
*
* 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 ("audio-encoder", "Audio encoder",
"Audio encoder GStreamer element (default is vorbisenc)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:video-muxer:
*
* 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 ("video-muxer", "Video muxer",
"Video muxer GStreamer element (default is oggmux)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:viewfinder-sink:
*
* Set up a sink element to render frames in view finder.
* By default "autovideosink" or DEFAULT_VIDEOSINK will be used.
* 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 ("viewfinder-sink", "Viewfinder sink",
"Viewfinder sink GStreamer element (NULL = default video sink)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:video-source:
*
* Set up a video source element.
* By default "autovideosrc" or DEFAULT_VIDEOSRC will be used.
* 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 ("video-source", "Video source element",
"Video source GStreamer element (NULL = default video src)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:audio-source:
*
* Set up an audio source element.
* By default "autoaudiosrc" or DEFAULT_AUDIOSRC will be used.
* 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 ("audio-source", "Audio source element",
"Audio source GStreamer element (NULL = default audio src)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:video-source-filter:
*
* Set up optional video filter element, all frames from video source
* will be processed by this element. e.g. An application might add
* image enhancers/parameter adjustment filters here to improve captured
* image/video results, or add analyzers to give feedback on capture
* the application.
* 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_SOURCE_FILTER,
g_param_spec_object ("video-source-filter", "video source filter element",
"Optional video filter GStreamer element, filters all frames from"
"the video source", GST_TYPE_ELEMENT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:video-source-caps:
*
* 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 ("video-source-caps", "Video source caps",
"The allowed modes of the video source operation",
GST_TYPE_CAPS, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:filter-caps:
*
* Caps applied to capsfilter element after videosrc [ ! ffmpegcsp ].
* You can use this e.g. to make sure video color format matches with
* encoders and other elements configured to camerabin and/or change
* resolution and frame rate.
*/
g_object_class_install_property (gobject_class, ARG_FILTER_CAPS,
g_param_spec_boxed ("filter-caps", "Filter caps",
"Filter video data coming from videosrc element",
GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:preview-caps:
*
* If application wants to receive a preview image, it needs to
* set this property to depict the desired image format caps. When
* this property is not set (NULL), message containing the preview
* image is not sent.
*/
g_object_class_install_property (gobject_class, ARG_PREVIEW_CAPS,
g_param_spec_boxed ("preview-caps", "Preview caps",
"Caps defining the preview image format",
GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:preview-source-filter:
* Set up preview filter element, all frames coming from appsrc
* element will be processed by this element.
* Applications can use this to overlay text/images for preview frame,
* for example.
* 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_PREVIEW_SOURCE_FILTER,
g_param_spec_object ("preview-source-filter",
"preview source filter element",
"Optional preview source filter GStreamer element",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:viewfinder-filter:
* Set up viewfinder filter element, all frames going to viewfinder sink
* element will be processed by this element.
* Applications can use this to overlay text/images in the screen, or
* plug facetracking algorithms, for example.
* 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_VIEWFINDER_FILTER,
g_param_spec_object ("viewfinder-filter", "viewfinder filter element",
"viewfinder filter GStreamer element",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:block-after-capture:
*
* Block viewfinder after capture.
* If it is TRUE when 'capture-start' is issued, camerabin will prepare to
* block and freeze the viewfinder after capturing. Setting it to FALSE will
* abort the blocking if it hasn't happened yet, or will enable again the
* viewfinder if it is already blocked. Note that setting this property
* to TRUE after 'capture-start' will only work for the next capture. This
* makes possible for applications to set the property to FALSE to abort
* the current blocking and already set it back to TRUE again to block at
* the next capture.
*
* This is useful if application wants to display the preview image
* and running the viewfinder at the same time would be just a waste of
* CPU cycles.
*/
g_object_class_install_property (gobject_class, ARG_BLOCK_VIEWFINDER,
g_param_spec_boolean ("block-after-capture",
"Block viewfinder after capture",
"Block viewfinder after capturing an image or video",
DEFAULT_BLOCK_VIEWFINDER,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:image-capture-width:
*
* The width to be used when capturing still images. If 0, the
* viewfinder's width will be used.
*/
g_object_class_install_property (gobject_class, ARG_IMAGE_CAPTURE_WIDTH,
g_param_spec_int ("image-capture-width",
"The width used for image capture",
"The width used for image capture", 0, G_MAXINT16,
DEFAULT_CAPTURE_WIDTH, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:image-capture-height:
*
* The height to be used when capturing still images. If 0, the
* viewfinder's height will be used.
*/
g_object_class_install_property (gobject_class, ARG_IMAGE_CAPTURE_HEIGHT,
g_param_spec_int ("image-capture-height",
"The height used for image capture",
"The height used for image capture", 0, G_MAXINT16,
DEFAULT_CAPTURE_HEIGHT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:video-capture-width:
*
* The width to be used when capturing video.
*/
g_object_class_install_property (gobject_class, ARG_VIDEO_CAPTURE_WIDTH,
g_param_spec_int ("video-capture-width",
"The width used for video capture",
"The width used for video capture", 0, G_MAXINT16,
DEFAULT_CAPTURE_WIDTH, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:video-capture-height:
*
* The height to be used when capturing video.
*/
g_object_class_install_property (gobject_class, ARG_VIDEO_CAPTURE_HEIGHT,
g_param_spec_int ("video-capture-height",
"The height used for video capture",
"The height used for video capture", 0, G_MAXINT16,
DEFAULT_CAPTURE_HEIGHT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin:video-capture-framerate:
*
* The framerate to be used when capturing video.
*/
g_object_class_install_property (gobject_class, ARG_VIDEO_CAPTURE_FRAMERATE,
gst_param_spec_fraction ("video-capture-framerate",
"The framerate used for video capture",
"The framerate used for video capture", 0, 1, G_MAXINT32, 1,
DEFAULT_FPS_N, DEFAULT_FPS_D,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin::capture-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[CAPTURE_START_SIGNAL] =
g_signal_new ("capture-start",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstCameraBinClass, capture_start),
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
/**
* GstCameraBin::capture-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[CAPTURE_STOP_SIGNAL] =
g_signal_new ("capture-stop",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstCameraBinClass, capture_stop),
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
/**
* GstCameraBin::capture-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[CAPTURE_PAUSE_SIGNAL] =
g_signal_new ("capture-pause",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstCameraBinClass, capture_pause),
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
/**
* GstCameraBin::set-video-resolution-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.
*
* This is the same as setting the 'video-capture-width',
* 'video-capture-height' and 'video-capture-framerate' properties, but it
* already updates the caps to force use this resolution and framerate.
*/
camerabin_signals[SET_VIDEO_RESOLUTION_FPS_SIGNAL] =
g_signal_new ("set-video-resolution-fps",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstCameraBinClass, set_video_resolution_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::set-image-resolution:
* @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.
*
* This actually sets the 'image-capture-width' and 'image-capture-height'
* properties.
*/
camerabin_signals[SET_IMAGE_RESOLUTION_SIGNAL] =
g_signal_new ("set-image-resolution",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstCameraBinClass, set_image_resolution),
NULL, NULL, __gst_camerabin_marshal_VOID__INT_INT, G_TYPE_NONE, 2,
G_TYPE_INT, G_TYPE_INT);
/**
* GstCameraBin::image-done:
* @camera: the camera bin element
* @filename: the name of the file just saved
*
* Signal emitted when the file has just been saved.
*
* 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 ("image-done", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstCameraBinClass, img_done),
g_signal_accumulator_true_handled, NULL,
__gst_camerabin_marshal_BOOLEAN__STRING, G_TYPE_BOOLEAN, 1,
G_TYPE_STRING);
klass->capture_start = gst_camerabin_capture_start;
klass->capture_stop = gst_camerabin_capture_stop;
klass->capture_pause = gst_camerabin_capture_pause;
klass->set_video_resolution_fps = gst_camerabin_set_video_resolution_fps;
klass->set_image_resolution = gst_camerabin_set_image_resolution;
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->flags = DEFAULT_FLAGS;
camera->stop_requested = FALSE;
camera->paused = FALSE;
camera->capturing = FALSE;
camera->night_mode = FALSE;
camera->eos_handled = FALSE;
camera->width = DEFAULT_WIDTH;
camera->height = DEFAULT_HEIGHT;
camera->fps_n = DEFAULT_FPS_N;
camera->fps_d = DEFAULT_FPS_D;
camera->image_capture_width = 0;
camera->image_capture_height = 0;
camera->base_crop_left = 0;
camera->base_crop_right = 0;
camera->base_crop_top = 0;
camera->base_crop_bottom = 0;
camera->event_tags = gst_tag_list_new ();
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_src_vid = NULL;
camera->pad_view_vid = NULL;
camera->video_preview_buffer = 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);
/* view finder elements */
camera->view_in_sel = NULL;
camera->view_scale = NULL;
camera->aspect_filter = NULL;
camera->view_sink = NULL;
camera->app_vf_sink = NULL;
camera->app_viewfinder_filter = NULL;
/* preview elements */
camera->app_preview_source_filter = NULL;
camera->app_video_preview_source_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->app_video_filter = NULL;
camera->app_vid_src = NULL;
camera->active_bin = 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);
if (camera->preview_pipeline) {
gst_camerabin_preview_destroy_pipeline (camera, camera->preview_pipeline);
camera->preview_pipeline = NULL;
}
if (camera->video_preview_pipeline) {
gst_camerabin_preview_destroy_pipeline (camera,
camera->video_preview_pipeline);
camera->video_preview_pipeline = NULL;
}
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:
camera->zoom = g_value_get_float (value);
/* does not set it if in NULL, the src is not created yet */
if (GST_STATE (camera) != GST_STATE_NULL)
gst_camerabin_setup_zoom (camera);
break;
case ARG_MODE:
gst_camerabin_change_mode (camera, g_value_get_enum (value));
break;
case ARG_FLAGS:
gst_camerabin_set_flags (camera, g_value_get_flags (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,
"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->app_vf_sink)
gst_object_unref (camera->app_vf_sink);
camera->app_vf_sink = g_value_get_object (value);
if (camera->app_vf_sink)
gst_object_ref (camera->app_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->app_vid_src)
gst_object_unref (camera->app_vid_src);
camera->app_vid_src = g_value_get_object (value);
if (camera->app_vid_src)
gst_object_ref (camera->app_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_VIDEO_SOURCE_FILTER:
if (GST_STATE (camera) != GST_STATE_NULL) {
GST_ELEMENT_ERROR (camera, CORE, FAILED,
("camerabin must be in NULL state when setting the video filter element"),
(NULL));
} else {
if (camera->app_video_filter)
gst_object_unref (camera->app_video_filter);
camera->app_video_filter = g_value_dup_object (value);
}
break;
case ARG_FILTER_CAPS:
GST_OBJECT_LOCK (camera);
gst_caps_replace (&camera->view_finder_caps,
(GstCaps *) gst_value_get_caps (value));
GST_OBJECT_UNLOCK (camera);
if (!camera->view_finder_caps)
camera->view_finder_caps =
gst_caps_from_string (CAMERABIN_DEFAULT_VF_CAPS);
gst_camerabin_configure_format (camera, camera->view_finder_caps);
break;
case ARG_PREVIEW_CAPS:
{
GstElement **prev_pipe = NULL;
GstElement **preview_source_filter = NULL;
GstCaps **prev_caps = NULL;
GstCaps *new_caps = NULL;
if (camera->mode == MODE_IMAGE) {
prev_pipe = &camera->preview_pipeline;
preview_source_filter = &camera->app_preview_source_filter;
prev_caps = &camera->preview_caps;
} else if (camera->mode == MODE_VIDEO) {
prev_pipe = &camera->video_preview_pipeline;
preview_source_filter = &camera->app_video_preview_source_filter;
prev_caps = &camera->video_preview_caps;
}
new_caps = (GstCaps *) gst_value_get_caps (value);
if (prev_caps && !gst_caps_is_equal (*prev_caps, new_caps)) {
GST_DEBUG_OBJECT (camera,
"setting preview caps: %" GST_PTR_FORMAT, new_caps);
if (*prev_pipe) {
gst_camerabin_preview_destroy_pipeline (camera, *prev_pipe);
*prev_pipe = NULL;
}
GST_OBJECT_LOCK (camera);
gst_caps_replace (prev_caps, new_caps);
GST_OBJECT_UNLOCK (camera);
if (new_caps && !gst_caps_is_any (new_caps) &&
!gst_caps_is_empty (new_caps)) {
*prev_pipe =
gst_camerabin_preview_create_pipeline (camera, new_caps,
*preview_source_filter);
}
}
break;
}
case ARG_PREVIEW_SOURCE_FILTER:
if (GST_STATE (camera) != GST_STATE_NULL) {
GST_ELEMENT_ERROR (camera, CORE, FAILED,
("camerabin must be in NULL state when setting the preview source filter element"),
(NULL));
} else {
GstElement **preview_pipe = NULL;
GstElement **preview_source_filter = NULL;
GstCaps *preview_caps = NULL;
if (camera->mode == MODE_IMAGE) {
preview_pipe = &camera->preview_pipeline;
preview_source_filter = &camera->app_preview_source_filter;
preview_caps = camera->preview_caps;
} else if (camera->mode == MODE_VIDEO) {
preview_pipe = &camera->video_preview_pipeline;
preview_source_filter = &camera->app_video_preview_source_filter;
preview_caps = camera->video_preview_caps;
}
if (*preview_source_filter)
gst_object_unref (*preview_source_filter);
*preview_source_filter = g_value_dup_object (value);
if (*preview_pipe) {
gst_camerabin_preview_destroy_pipeline (camera, *preview_pipe);
*preview_pipe =
gst_camerabin_preview_create_pipeline (camera, preview_caps,
*preview_source_filter);
}
}
break;
case ARG_VIEWFINDER_FILTER:
if (GST_STATE (camera) != GST_STATE_NULL) {
GST_ELEMENT_ERROR (camera, CORE, FAILED,
("camerabin must be in NULL state when setting the viewfinder filter element"),
(NULL));
} else {
if (camera->app_viewfinder_filter)
gst_object_unref (camera->app_viewfinder_filter);
camera->app_viewfinder_filter = g_value_dup_object (value);
}
break;
case ARG_BLOCK_VIEWFINDER:
gst_camerabin_change_viewfinder_blocking (camera,
g_value_get_boolean (value));
break;
case ARG_IMAGE_CAPTURE_WIDTH:
{
gint width = g_value_get_int (value);
if (width != camera->image_capture_width) {
camera->image_capture_width = width;
camera->image_capture_caps_update = TRUE;
}
}
break;
case ARG_IMAGE_CAPTURE_HEIGHT:
{
gint height = g_value_get_int (value);
if (height != camera->image_capture_height) {
camera->image_capture_height = height;
camera->image_capture_caps_update = TRUE;
}
}
break;
case ARG_VIDEO_CAPTURE_WIDTH:
{
gint width = g_value_get_int (value);
if (width != camera->width) {
camera->width = width;
camera->video_capture_caps_update = TRUE;
}
}
break;
case ARG_VIDEO_CAPTURE_HEIGHT:
{
gint height = g_value_get_int (value);
if (height != camera->height) {
camera->height = height;
camera->video_capture_caps_update = TRUE;
}
}
break;
case ARG_VIDEO_CAPTURE_FRAMERATE:
{
gint fps_n, fps_d;
fps_n = gst_value_get_fraction_numerator (value);
fps_d = gst_value_get_fraction_denominator (value);
if (fps_n != camera->fps_n || fps_d != camera->fps_d) {
camera->fps_n = fps_n;
camera->fps_d = fps_d;
camera->video_capture_caps_update = TRUE;
}
}
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_FLAGS:
g_value_set_flags (value, camera->flags);
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_float (value, 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:
if (camera->view_sink)
g_value_set_object (value, camera->view_sink);
else
g_value_set_object (value, camera->app_vf_sink);
break;
case ARG_VIDEO_SRC:
if (camera->src_vid_src)
g_value_set_object (value, camera->src_vid_src);
else
g_value_set_object (value, camera->app_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_VIDEO_SOURCE_FILTER:
g_value_set_object (value, camera->app_video_filter);
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;
case ARG_PREVIEW_CAPS:
if (camera->mode == MODE_IMAGE)
gst_value_set_caps (value, camera->preview_caps);
else if (camera->mode == MODE_VIDEO)
gst_value_set_caps (value, camera->video_preview_caps);
break;
case ARG_PREVIEW_SOURCE_FILTER:
if (camera->mode == MODE_IMAGE)
g_value_set_object (value, camera->app_preview_source_filter);
else if (camera->mode == MODE_VIDEO)
g_value_set_object (value, camera->app_video_preview_source_filter);
break;
case ARG_VIEWFINDER_FILTER:
g_value_set_object (value, camera->app_viewfinder_filter);
break;
case ARG_BLOCK_VIEWFINDER:
g_value_set_boolean (value, camera->block_viewfinder_prop);
break;
case ARG_IMAGE_CAPTURE_WIDTH:
g_value_set_int (value, camera->image_capture_width);
break;
case ARG_IMAGE_CAPTURE_HEIGHT:
g_value_set_int (value, camera->image_capture_height);
break;
case ARG_VIDEO_CAPTURE_WIDTH:
g_value_set_int (value, camera->width);
break;
case ARG_VIDEO_CAPTURE_HEIGHT:
g_value_set_int (value, camera->height);
break;
case ARG_VIDEO_CAPTURE_FRAMERATE:
gst_value_set_fraction (value, camera->fps_n, camera->fps_d);
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;
GST_DEBUG_OBJECT (element, "changing state: %s -> %s",
gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
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);
GST_DEBUG_OBJECT (element, "after chaining up: %s -> %s = %s",
gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)),
gst_element_state_change_return_get_name (ret));
switch (transition) {
case GST_STATE_CHANGE_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);
/* unblock the viewfinder, but keep the property as is */
gst_pad_set_blocked_async (camera->pad_src_view, FALSE,
(GstPadBlockCallback) camerabin_pad_blocked, camera);
g_signal_handlers_disconnect_by_func (camera->src_vid_src,
gst_camerabin_scene_mode_notify_cb, camera);
g_signal_handlers_disconnect_by_func (camera->src_vid_src,
gst_camerabin_zoom_notify_cb, camera);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
camerabin_destroy_elements (camera);
break;
/* In some error situation camerabin may end up being still in NULL
state so we must take care of destroying elements. */
case GST_STATE_CHANGE_NULL_TO_READY:
if (ret == GST_STATE_CHANGE_FAILURE)
camerabin_destroy_elements (camera);
break;
default:
break;
}
done:
GST_DEBUG_OBJECT (element, "changed state: %s -> %s = %s",
gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)),
gst_element_state_change_return_get_name (ret));
return ret;
}
static gboolean
gst_camerabin_imgbin_finished (gpointer u_data)
{
GstCameraBin *camera = GST_CAMERABIN (u_data);
gchar *filename = NULL;
/* Get the filename of the finished image */
g_object_get (G_OBJECT (camera->imgbin), "filename", &filename, NULL);
GST_DEBUG_OBJECT (camera, "Image encoding finished");
/* Close the file of saved image */
gst_element_set_state (camera->imgbin, GST_STATE_READY);
GST_DEBUG_OBJECT (camera, "Image pipeline set to READY");
/* Send image-done signal */
gst_camerabin_image_capture_continue (camera, filename);
g_free (filename);
/* Set image bin back to PAUSED so that buffer-allocs don't fail */
gst_element_set_state (camera->imgbin, GST_STATE_PAUSED);
/* Unblock image queue pad to process next buffer */
gst_pad_set_blocked_async (camera->pad_src_queue, FALSE,
(GstPadBlockCallback) camerabin_pad_blocked, camera);
GST_DEBUG_OBJECT (camera, "Queue srcpad unblocked");
/* disconnect automatically */
return FALSE;
}
/*
* 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");
/* Calling callback directly will deadlock in
imagebin state change functions */
g_idle_add_full (G_PRIORITY_HIGH, gst_camerabin_imgbin_finished, camera,
NULL);
}
break;
case GST_MESSAGE_ERROR:
GST_DEBUG_OBJECT (camera, "error from child %" GST_PTR_FORMAT,
GST_MESSAGE_SRC (msg));
g_mutex_lock (camera->capture_mutex);
if (camera->capturing) {
camera->capturing = FALSE;
g_cond_signal (camera->cond);
}
g_mutex_unlock (camera->capture_mutex);
break;
default:
break;
}
GST_BIN_CLASS (parent_class)->handle_message (bin, msg);
}
/*
* Action signal function implementation
*/
static void
gst_camerabin_capture_start (GstCameraBin * camera)
{
GST_INFO_OBJECT (camera, "starting capture");
if (camera->paused) {
gst_camerabin_capture_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 (!camera->active_bin) {
GST_ELEMENT_ERROR (camera, CORE, FAILED,
("starting capture failed"), (NULL));
}
}
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);
/* FIXME: we need to send something more to the app, so that it does not for
* for image-done */
g_mutex_unlock (camera->capture_mutex);
return;
}
g_mutex_unlock (camera->capture_mutex);
GST_OBJECT_LOCK (camera);
camera->block_viewfinder_trigger = camera->block_viewfinder_prop;
GST_OBJECT_UNLOCK (camera);
if (camera->active_bin) {
if (camera->active_bin == camera->imgbin) {
GST_INFO_OBJECT (camera, "starting image capture");
gst_camerabin_start_image_capture (camera);
} else if (camera->active_bin == camera->vidbin) {
GST_INFO_OBJECT (camera,
"setting video filename and starting video capture");
g_object_set (G_OBJECT (camera->active_bin), "filename",
camera->filename->str, NULL);
gst_camerabin_start_video_recording (camera);
}
}
}
static void
gst_camerabin_capture_stop (GstCameraBin * camera)
{
if (camera->active_bin == camera->vidbin) {
GST_INFO_OBJECT (camera, "stopping video capture");
gst_camerabin_do_stop (camera);
gst_camerabin_reset_to_view_finder (camera);
} else {
GST_INFO_OBJECT (camera, "stopping image capture isn't needed");
}
}
static void
gst_camerabin_capture_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);
/* 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);
/* 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_set_video_resolution_fps (GstCameraBin * camera, gint width,
gint height, gint fps_n, gint fps_d)
{
g_object_set (camera, "video-capture-width", width, "video-capture-height",
height, "video-capture-framerate", fps_n, fps_d, NULL);
reset_video_capture_caps (camera);
}
static void
gst_camerabin_set_image_capture_caps (GstCameraBin * camera, gint width,
gint height)
{
GstStructure *structure;
GstCaps *new_caps = NULL;
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 allowed framerate for the resolution. */
gst_camerabin_set_allowed_framerate (camera, new_caps);
}
GST_INFO_OBJECT (camera,
"init filter caps for image capture %" GST_PTR_FORMAT, new_caps);
gst_caps_replace (&camera->image_capture_caps, new_caps);
camera->image_capture_caps_update = FALSE;
}
static void
gst_camerabin_set_image_resolution (GstCameraBin * camera, gint width,
gint height)
{
g_object_set (camera, "image-capture-width", (guint16) width,
"image-capture-height", (guint16) height, NULL);
}
/* 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)
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