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gstreamer/gst/camerabin/gstcamerabin.c
Thiago Santos 5cb8164938 camerabin: Do not wrongly fail when starting a capture 
If the elements are in NULL/READY and changing state to
PAUSED/PLAYING while a capture is started
camerabin might not set the active_bin properly causing the
capture start to fail.

This patch fixes it by checking the current and pending state
of the branches instead of only the current one
2010-09-29 18:42:27 -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)) {
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);
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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