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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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3031 lines
93 KiB
C
3031 lines
93 KiB
C
/*
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* GStreamer
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* Copyright (C) 2008 Nokia Corporation <multimedia@maemo.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-camerabin
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*
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* GstCameraBin is a high-level camera object that encapsulates the gstreamer
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* internals and provides a task based API for the application. It consists of
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* three main data paths: view-finder, image capture and video capture.
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*
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* <informalfigure>
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* <mediaobject>
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* <imageobject><imagedata fileref="camerabin.png"/></imageobject>
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* <textobject><phrase>CameraBin structure</phrase></textobject>
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* <caption><para>Structural decomposition of CameraBin object.</para></caption>
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* </mediaobject>
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* </informalfigure>
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch -v -m camerabin filename=test.jpeg
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* ]|
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* </refsect2>
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* <refsect2>
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* <title>Image capture</title>
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* <para>
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* Taking still images is initiated with the #GstCameraBin::user-start action
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* signal. Once the image has captured, #GstCameraBin::img-done signal is fired.
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* It allows to decide wheter to take another picture (burst capture, bracketing
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* shot) or stop capturing. The last captured image is shown
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* until one switches back to view finder using #GstCameraBin::user-stop action
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* signal.
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*
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* Available resolutions can be taken from the #GstCameraBin:inputcaps property.
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* Image capture resolution can be set with #GstCameraBin::user-image-res
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* action signal.
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* </para>
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* </refsect2>
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* <refsect2>
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* <title>Video capture</title>
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* <para>
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* Video capture is started with the #GstCameraBin::user-start action signal too.
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* In addition to image capture one can use #GstCameraBin::user-pause to
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* pause recording and #GstCameraBin::user-stop to end recording.
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*
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* Available resolutions and fps can be taken from the #GstCameraBin:inputcaps
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* property. #GstCameraBin::user-res-fps action signal can be used to set frame
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* rate and resolution for the video recording and view finder as well.
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* </para>
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* </refsect2>
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* <refsect2>
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* <title>Photography interface</title>
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* <para>
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* GstCameraBin implements gst photography interface, which can be used to set
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* and get different settings related to digital imaging. Since currently many
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* of these settings require low-level support the photography interface support
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* is dependent on video src element. In practice photography interface settings
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* cannot be used successfully until in PAUSED state when the video src has
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* opened the video device. However it is possible to configure photography
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* settings in NULL state and camerabin will try applying them later.
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* </para>
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* </refsect2>
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* <refsect2>
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* <title>States</title>
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* <para>
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* Elements within GstCameraBin are created and destroyed when switching
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* between NULL and READY states. Therefore element properties should be set
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* in NULL state. User set elements are not unreffed until GstCameraBin is
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* unreffed or replaced by a new user set element. Initially only elements needed
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* for view finder mode are created to speed up startup. Image bin and video bin
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* elements are created when setting the mode or starting capture.
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* </para>
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* </refsect2>
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* <refsect2>
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* <note>
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* <para>
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* Since the muxers tested so far have problems with discontinous buffers, QoS
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* has been disabled, and then in order to record video, you MUST ensure that
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* there is enough CPU to encode the video. Thus choose smart resolution and
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* frames per second values. It is also highly recommended to avoid color
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* conversions; make sure all the elements involved work with the same colorspace
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* (i.e. rgb or yuv i420 or whatelse).
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* </para>
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* </note>
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* </refsect2>
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*/
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/*
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* The pipeline in the camerabin is
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*
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* "image bin"
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* videosrc ! crop ! scale ! out-sel <------> in-sel ! scale ! ffmpegcsp ! vfsink
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* "video bin"
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*
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* it is possible to have 'ffmpegcolorspace' and 'capsfilter' just after
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* v4l2camsrc
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*
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* The properties of elements are:
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*
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* vfsink - "sync", FALSE, "qos", FALSE
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* output-selector - "resend-latest", FALSE
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* input-selector - "select-all", TRUE
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*/
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/*
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* includes
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <string.h>
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#include <stdlib.h>
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#include <gst/gst.h>
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/* FIXME: include #include <gst/gst-i18n-plugin.h> and use _(" ") */
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#include "gstcamerabin.h"
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#include "gstcamerabincolorbalance.h"
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#include "gstcamerabinphotography.h"
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#include "camerabingeneral.h"
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#include "gstcamerabin-marshal.h"
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/*
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* enum and types
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*/
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enum
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{
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/* action signals */
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USER_START_SIGNAL,
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USER_STOP_SIGNAL,
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USER_PAUSE_SIGNAL,
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USER_RES_FPS_SIGNAL,
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USER_IMAGE_RES_SIGNAL,
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/* emit signals */
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IMG_DONE_SIGNAL,
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_FILENAME,
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ARG_MODE,
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ARG_MUTE,
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ARG_ZOOM,
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ARG_IMAGE_POST,
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ARG_IMAGE_ENC,
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ARG_VIDEO_POST,
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ARG_VIDEO_ENC,
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ARG_AUDIO_ENC,
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ARG_VIDEO_MUX,
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ARG_VF_SINK,
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ARG_VIDEO_SRC,
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ARG_AUDIO_SRC,
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ARG_INPUT_CAPS,
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ARG_FILTER_CAPS
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};
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/*
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* defines and static global vars
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*/
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static guint camerabin_signals[LAST_SIGNAL];
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#define GST_TYPE_CAMERABIN_MODE (gst_camerabin_mode_get_type ())
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/* default and range values for args */
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#define DEFAULT_MODE MODE_IMAGE
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#define DEFAULT_ZOOM 100
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#define DEFAULT_WIDTH 640
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#define DEFAULT_HEIGHT 480
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#define DEFAULT_CAPTURE_WIDTH 800
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#define DEFAULT_CAPTURE_HEIGHT 600
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#define DEFAULT_FPS_N 0 /* makes it use the default */
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#define DEFAULT_FPS_D 1
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#define CAMERABIN_DEFAULT_VF_CAPS "video/x-raw-yuv,format=(fourcc)I420"
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/* Using "bilinear" as default zoom method */
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#define CAMERABIN_DEFAULT_ZOOM_METHOD 1
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#define MIN_ZOOM 100
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#define MAX_ZOOM 1000
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#define ZOOM_1X MIN_ZOOM
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#define DEFAULT_V4L2CAMSRC_DRIVER_NAME "omap3cam"
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/* internal element names */
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#define USE_COLOR_CONVERTER 1
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/* FIXME: Make sure this can work with autovideosrc and use that. */
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#define DEFAULT_SRC_VID_SRC "v4l2src"
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#define DEFAULT_VIEW_SINK "autovideosink"
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/*
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* static helper functions declaration
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*/
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static void camerabin_setup_src_elements (GstCameraBin * camera);
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static gboolean camerabin_create_src_elements (GstCameraBin * camera);
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static void camerabin_setup_view_elements (GstCameraBin * camera);
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static gboolean camerabin_create_view_elements (GstCameraBin * camera);
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static gboolean camerabin_create_elements (GstCameraBin * camera);
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static void camerabin_destroy_elements (GstCameraBin * camera);
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static void camerabin_dispose_elements (GstCameraBin * camera);
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static void gst_camerabin_change_mode (GstCameraBin * camera, gint mode);
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static void
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gst_camerabin_change_filename (GstCameraBin * camera, const gchar * name);
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static void gst_camerabin_setup_zoom (GstCameraBin * camera);
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static GstCaps *gst_camerabin_get_allowed_input_caps (GstCameraBin * camera);
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static void gst_camerabin_rewrite_tags (GstCameraBin * camera);
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static void
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gst_camerabin_set_capsfilter_caps (GstCameraBin * camera, GstCaps * new_caps);
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static void gst_camerabin_start_image_capture (GstCameraBin * camera);
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static void gst_camerabin_start_video_recording (GstCameraBin * camera);
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static gboolean
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gst_camerabin_have_img_buffer (GstPad * pad, GstBuffer * buffer,
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gpointer u_data);
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static gboolean
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gst_camerabin_have_vid_buffer (GstPad * pad, GstBuffer * buffer,
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gpointer u_data);
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static void gst_camerabin_reset_to_view_finder (GstCameraBin * camera);
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static void gst_camerabin_do_stop (GstCameraBin * camera);
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static void
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gst_camerabin_set_allowed_framerate (GstCameraBin * camera,
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GstCaps * filter_caps);
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static guint32 get_srcpad_current_format (GstElement * element);
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static const GValue *gst_camerabin_find_better_framerate (GstCameraBin * camera,
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GstStructure * st, const GValue * orig_framerate);
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static void
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gst_camerabin_update_aspect_filter (GstCameraBin * camera, GstCaps * new_caps);
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static void gst_camerabin_finish_image_capture (GstCameraBin * camera);
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/*
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* GObject callback functions declaration
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*/
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static void gst_camerabin_base_init (gpointer gclass);
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static void gst_camerabin_class_init (GstCameraBinClass * klass);
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static void
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gst_camerabin_init (GstCameraBin * camera, GstCameraBinClass * gclass);
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static void gst_camerabin_dispose (GObject * object);
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static void gst_camerabin_finalize (GObject * object);
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static void gst_camerabin_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_camerabin_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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/*
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* GstElement function declarations
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*/
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static GstStateChangeReturn
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gst_camerabin_change_state (GstElement * element, GstStateChange transition);
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/*
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* GstBin function declarations
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*/
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static void
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gst_camerabin_handle_message_func (GstBin * bin, GstMessage * message);
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/*
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* Action signal function declarations
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*/
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static void gst_camerabin_user_start (GstCameraBin * camera);
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static void gst_camerabin_user_stop (GstCameraBin * camera);
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static void gst_camerabin_user_pause (GstCameraBin * camera);
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static void
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gst_camerabin_user_res_fps (GstCameraBin * camera, gint width, gint height,
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gint fps_n, gint fps_d);
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static void
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gst_camerabin_user_image_res (GstCameraBin * camera, gint width, gint height);
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/*
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* GST BOILERPLATE and GObject types
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*/
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static GType
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gst_camerabin_mode_get_type (void)
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{
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static GType gtype = 0;
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if (gtype == 0) {
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static const GEnumValue values[] = {
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{MODE_IMAGE, "Still image capture (default)", "mode-image"},
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{MODE_VIDEO, "Video recording", "mode-video"},
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{0, NULL, NULL}
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};
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gtype = g_enum_register_static ("GstCameraBinMode", values);
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}
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return gtype;
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}
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static gboolean
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gst_camerabin_iface_supported (GstImplementsInterface * iface, GType iface_type)
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{
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GstCameraBin *camera = GST_CAMERABIN (iface);
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if (iface_type == GST_TYPE_COLOR_BALANCE) {
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if (camera->src_vid_src) {
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return GST_IS_COLOR_BALANCE (camera->src_vid_src);
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}
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} else if (iface_type == GST_TYPE_TAG_SETTER) {
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/* Note: Tag setter elements aren't
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present when image and video bin in NULL */
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GstElement *setter;
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setter = gst_bin_get_by_interface (GST_BIN (camera), iface_type);
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if (setter) {
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gst_object_unref (setter);
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return TRUE;
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} else {
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return FALSE;
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}
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} else if (iface_type == GST_TYPE_PHOTOGRAPHY) {
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/* Always support photography interface */
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return TRUE;
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}
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return FALSE;
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}
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static void
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gst_camerabin_interface_init (GstImplementsInterfaceClass * klass)
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{
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/*
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* default virtual functions
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*/
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klass->supported = gst_camerabin_iface_supported;
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}
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static void
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camerabin_init_interfaces (GType type)
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{
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static const GInterfaceInfo camerabin_info = {
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(GInterfaceInitFunc) gst_camerabin_interface_init,
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NULL,
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NULL,
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};
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static const GInterfaceInfo camerabin_color_balance_info = {
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(GInterfaceInitFunc) gst_camerabin_color_balance_init,
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NULL,
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NULL,
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};
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static const GInterfaceInfo camerabin_tagsetter_info = {
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NULL,
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NULL,
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NULL,
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};
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static const GInterfaceInfo camerabin_photography_info = {
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(GInterfaceInitFunc) gst_camerabin_photography_init,
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NULL,
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NULL,
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};
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g_type_add_interface_static (type,
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GST_TYPE_IMPLEMENTS_INTERFACE, &camerabin_info);
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g_type_add_interface_static (type, GST_TYPE_COLOR_BALANCE,
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&camerabin_color_balance_info);
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g_type_add_interface_static (type, GST_TYPE_TAG_SETTER,
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&camerabin_tagsetter_info);
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g_type_add_interface_static (type, GST_TYPE_PHOTOGRAPHY,
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&camerabin_photography_info);
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}
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GST_BOILERPLATE_FULL (GstCameraBin, gst_camerabin, GstPipeline,
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GST_TYPE_PIPELINE, camerabin_init_interfaces);
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/*
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* static helper functions implementation
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*/
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/*
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* camerabin_setup_src_elements:
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* @camera: camerabin object
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*
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* This function updates camerabin capsfilters according
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* to fps, resolution and zoom that have been configured
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* to camerabin.
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*/
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static void
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camerabin_setup_src_elements (GstCameraBin * camera)
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{
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GstStructure *st;
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GstCaps *new_caps;
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gboolean detect_framerate = FALSE;
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if (!camera->view_finder_caps) {
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st = gst_structure_from_string (CAMERABIN_DEFAULT_VF_CAPS, NULL);
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} else {
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st = gst_structure_copy (gst_caps_get_structure (camera->view_finder_caps,
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0));
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}
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/* Update photography interface settings */
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if (GST_IS_ELEMENT (camera->src_vid_src) &&
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gst_element_implements_interface (camera->src_vid_src,
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GST_TYPE_PHOTOGRAPHY)) {
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gst_photography_set_config (GST_PHOTOGRAPHY (camera->src_vid_src),
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&camera->photo_settings);
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}
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if (camera->width > 0 && camera->height > 0) {
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gst_structure_set (st,
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"width", G_TYPE_INT, camera->width,
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"height", G_TYPE_INT, camera->height, NULL);
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}
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if (camera->fps_n > 0 && camera->fps_d > 0) {
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if (camera->night_mode) {
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GST_WARNING_OBJECT (camera,
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"night mode, lowest allowed fps will be forced");
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camera->pre_night_fps_n = camera->fps_n;
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camera->pre_night_fps_d = camera->fps_d;
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detect_framerate = TRUE;
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} else {
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gst_structure_set (st,
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"framerate", GST_TYPE_FRACTION, camera->fps_n, camera->fps_d, NULL);
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new_caps = gst_caps_new_full (st, NULL);
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}
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} else {
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GST_DEBUG_OBJECT (camera, "no framerate specified");
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detect_framerate = TRUE;
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}
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if (detect_framerate) {
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GST_DEBUG_OBJECT (camera, "detecting allowed framerate");
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/* Remove old framerate if any */
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if (gst_structure_has_field (st, "framerate")) {
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gst_structure_remove_field (st, "framerate");
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}
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new_caps = gst_caps_new_full (st, NULL);
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/* Set allowed framerate for the resolution */
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gst_camerabin_set_allowed_framerate (camera, new_caps);
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}
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/* Set default zoom method */
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g_object_set (camera->src_zoom_scale, "method",
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CAMERABIN_DEFAULT_ZOOM_METHOD, NULL);
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gst_caps_replace (&camera->view_finder_caps, new_caps);
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/* Set caps for view finder mode */
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gst_camerabin_set_capsfilter_caps (camera, camera->view_finder_caps);
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}
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/*
|
|
* camerabin_create_src_elements:
|
|
* @camera: camerabin object
|
|
*
|
|
* This function creates and links upstream side elements for camerabin.
|
|
* videosrc ! cspconv ! capsfilter ! crop ! scale ! capsfilter ! out-sel !
|
|
*
|
|
* Returns: TRUE, if elements were successfully created, FALSE otherwise
|
|
*/
|
|
static gboolean
|
|
camerabin_create_src_elements (GstCameraBin * camera)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstBin *cbin = GST_BIN (camera);
|
|
gchar *driver_name = NULL;
|
|
|
|
if (camera->user_vid_src) {
|
|
camera->src_vid_src = camera->user_vid_src;
|
|
|
|
if (!gst_camerabin_add_element (cbin, camera->src_vid_src)) {
|
|
camera->src_vid_src = NULL;
|
|
goto done;
|
|
}
|
|
} else if (!(camera->src_vid_src =
|
|
gst_camerabin_create_and_add_element (cbin, DEFAULT_SRC_VID_SRC)))
|
|
goto done;
|
|
#ifdef USE_COLOR_CONVERTER
|
|
if (!gst_camerabin_create_and_add_element (cbin, "ffmpegcolorspace"))
|
|
goto done;
|
|
#endif
|
|
if (!(camera->src_filter =
|
|
gst_camerabin_create_and_add_element (cbin, "capsfilter")))
|
|
goto done;
|
|
if (!(camera->src_zoom_crop =
|
|
gst_camerabin_create_and_add_element (cbin, "videocrop")))
|
|
goto done;
|
|
if (!(camera->src_zoom_scale =
|
|
gst_camerabin_create_and_add_element (cbin, "videoscale")))
|
|
goto done;
|
|
if (!(camera->src_zoom_filter =
|
|
gst_camerabin_create_and_add_element (cbin, "capsfilter")))
|
|
goto done;
|
|
if (!(camera->src_out_sel =
|
|
gst_camerabin_create_and_add_element (cbin, "output-selector")))
|
|
goto done;
|
|
|
|
camera->srcpad_videosrc =
|
|
gst_element_get_static_pad (camera->src_vid_src, "src");
|
|
|
|
camera->srcpad_zoom_filter =
|
|
gst_element_get_static_pad (camera->src_zoom_filter, "src");
|
|
|
|
/* Set default "driver-name" for v4l2camsrc if not set */
|
|
if (g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src_vid_src),
|
|
"driver-name")) {
|
|
g_object_get (G_OBJECT (camera->src_vid_src), "driver-name",
|
|
&driver_name, NULL);
|
|
if (!driver_name) {
|
|
g_object_set (G_OBJECT (camera->src_vid_src), "driver-name",
|
|
DEFAULT_V4L2CAMSRC_DRIVER_NAME, NULL);
|
|
}
|
|
}
|
|
|
|
ret = TRUE;
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* camerabin_setup_view_elements:
|
|
* @camera: camerabin object
|
|
*
|
|
* This function configures properties for view finder sink element.
|
|
*/
|
|
static void
|
|
camerabin_setup_view_elements (GstCameraBin * camera)
|
|
{
|
|
GST_DEBUG_OBJECT (camera, "setting view finder properties");
|
|
g_object_set (G_OBJECT (camera->view_in_sel), "select-all", TRUE, NULL);
|
|
/* Set properties for view finder sink */
|
|
/* Find the actual sink if using bin like autovideosink */
|
|
if (GST_IS_BIN (camera->view_sink)) {
|
|
GList *child = NULL, *children = GST_BIN_CHILDREN (camera->view_sink);
|
|
for (child = children; child != NULL; child = g_list_next (children)) {
|
|
GObject *ch = G_OBJECT (child->data);
|
|
if (g_object_class_find_property (G_OBJECT_GET_CLASS (ch), "sync")) {
|
|
g_object_set (G_OBJECT (ch), "sync", FALSE, "qos", FALSE, "async",
|
|
FALSE, NULL);
|
|
}
|
|
}
|
|
} else {
|
|
g_object_set (G_OBJECT (camera->view_sink), "sync", FALSE, "qos", FALSE,
|
|
"async", FALSE, NULL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* camerabin_create_view_elements:
|
|
* @camera: camerabin object
|
|
*
|
|
* This function creates and links downstream side elements for camerabin.
|
|
* ! scale ! cspconv ! view finder sink
|
|
*
|
|
* Returns: TRUE, if elements were successfully created, FALSE otherwise
|
|
*/
|
|
static gboolean
|
|
camerabin_create_view_elements (GstCameraBin * camera)
|
|
{
|
|
const GList *pads;
|
|
|
|
if (!(camera->view_in_sel =
|
|
gst_camerabin_create_and_add_element (GST_BIN (camera),
|
|
"input-selector"))) {
|
|
goto error;
|
|
}
|
|
|
|
/* Look for recently added input selector sink pad, we need to release it later */
|
|
pads = GST_ELEMENT_PADS (camera->view_in_sel);
|
|
while (pads != NULL
|
|
&& (GST_PAD_DIRECTION (GST_PAD (pads->data)) != GST_PAD_SINK)) {
|
|
pads = g_list_next (pads);
|
|
}
|
|
camera->pad_view_img = GST_PAD (pads->data);
|
|
|
|
if (!(camera->view_scale =
|
|
gst_camerabin_create_and_add_element (GST_BIN (camera),
|
|
"videoscale"))) {
|
|
goto error;
|
|
}
|
|
|
|
if (!(camera->aspect_filter =
|
|
gst_camerabin_create_and_add_element (GST_BIN (camera),
|
|
"capsfilter"))) {
|
|
goto error;
|
|
}
|
|
#ifdef USE_COLOR_CONVERTER
|
|
if (!gst_camerabin_create_and_add_element (GST_BIN (camera),
|
|
"ffmpegcolorspace")) {
|
|
goto error;
|
|
}
|
|
#endif
|
|
if (camera->user_vf_sink) {
|
|
camera->view_sink = camera->user_vf_sink;
|
|
if (!gst_camerabin_add_element (GST_BIN (camera), camera->view_sink)) {
|
|
goto error;
|
|
}
|
|
} else if (!(camera->view_sink =
|
|
gst_camerabin_create_and_add_element (GST_BIN (camera),
|
|
DEFAULT_VIEW_SINK))) {
|
|
goto error;
|
|
}
|
|
|
|
return TRUE;
|
|
error:
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* camerabin_create_elements:
|
|
* @camera: camerabin object
|
|
*
|
|
* This function creates and links all elements for camerabin,
|
|
*
|
|
* Returns: TRUE, if elements were successfully created, FALSE otherwise
|
|
*/
|
|
static gboolean
|
|
camerabin_create_elements (GstCameraBin * camera)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstPadLinkReturn link_ret = GST_PAD_LINK_REFUSED;
|
|
GstPad *unconnected_pad;
|
|
|
|
GST_LOG_OBJECT (camera, "creating elems");
|
|
|
|
/* Create "src" elements */
|
|
if (!camerabin_create_src_elements (camera)) {
|
|
goto done;
|
|
}
|
|
|
|
/* Add image bin */
|
|
camera->pad_src_img =
|
|
gst_element_get_request_pad (camera->src_out_sel, "src%d");
|
|
if (!gst_camerabin_add_element (GST_BIN (camera), camera->imgbin)) {
|
|
goto done;
|
|
}
|
|
gst_pad_add_buffer_probe (camera->pad_src_img,
|
|
G_CALLBACK (gst_camerabin_have_img_buffer), camera);
|
|
|
|
/* Create view finder elements, this also links it to image bin */
|
|
if (!camerabin_create_view_elements (camera)) {
|
|
GST_WARNING_OBJECT (camera, "creating view failed");
|
|
goto done;
|
|
}
|
|
|
|
/* Link output selector ! view_finder */
|
|
camera->pad_src_view =
|
|
gst_element_get_request_pad (camera->src_out_sel, "src%d");
|
|
camera->pad_view_src =
|
|
gst_element_get_request_pad (camera->view_in_sel, "sink%d");
|
|
link_ret = gst_pad_link (camera->pad_src_view, camera->pad_view_src);
|
|
if (GST_PAD_LINK_FAILED (link_ret)) {
|
|
GST_ELEMENT_ERROR (camera, CORE, NEGOTIATION,
|
|
("linking view finder failed"), (NULL));
|
|
goto done;
|
|
}
|
|
|
|
/* Set view finder active as default */
|
|
g_object_set (G_OBJECT (camera->src_out_sel), "active-pad",
|
|
camera->pad_src_view, NULL);
|
|
|
|
/* Add video bin */
|
|
camera->pad_src_vid =
|
|
gst_element_get_request_pad (camera->src_out_sel, "src%d");
|
|
if (!gst_camerabin_add_element (GST_BIN (camera), camera->vidbin)) {
|
|
goto done;
|
|
}
|
|
gst_pad_add_buffer_probe (camera->pad_src_vid,
|
|
G_CALLBACK (gst_camerabin_have_vid_buffer), camera);
|
|
|
|
/* Link video bin ! view finder */
|
|
unconnected_pad = gst_bin_find_unlinked_pad (GST_BIN (camera), GST_PAD_SRC);
|
|
camera->pad_view_vid =
|
|
gst_element_get_request_pad (camera->view_in_sel, "sink%d");
|
|
link_ret = gst_pad_link (unconnected_pad, camera->pad_view_vid);
|
|
gst_object_unref (unconnected_pad);
|
|
if (GST_PAD_LINK_FAILED (link_ret)) {
|
|
GST_ELEMENT_ERROR (camera, CORE, NEGOTIATION, (NULL),
|
|
("linking video bin and view finder failed"));
|
|
goto done;
|
|
}
|
|
|
|
ret = TRUE;
|
|
|
|
done:
|
|
|
|
if (FALSE == ret)
|
|
camerabin_destroy_elements (camera);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* camerabin_destroy_elements:
|
|
* @camera: camerabin object
|
|
*
|
|
* This function removes all elements from camerabin.
|
|
*/
|
|
static void
|
|
camerabin_destroy_elements (GstCameraBin * camera)
|
|
{
|
|
GST_DEBUG_OBJECT (camera, "destroying elements");
|
|
|
|
/* Release request pads */
|
|
if (camera->pad_view_vid) {
|
|
gst_element_release_request_pad (camera->view_in_sel, camera->pad_view_vid);
|
|
camera->pad_view_vid = NULL;
|
|
}
|
|
if (camera->pad_src_vid) {
|
|
gst_element_release_request_pad (camera->src_out_sel, camera->pad_src_vid);
|
|
camera->pad_src_vid = NULL;
|
|
}
|
|
if (camera->pad_view_img) {
|
|
gst_element_release_request_pad (camera->view_in_sel, camera->pad_view_img);
|
|
camera->pad_view_img = NULL;
|
|
}
|
|
if (camera->pad_src_img) {
|
|
gst_element_release_request_pad (camera->src_out_sel, camera->pad_src_img);
|
|
camera->pad_src_img = NULL;
|
|
}
|
|
if (camera->pad_view_src) {
|
|
gst_element_release_request_pad (camera->view_in_sel, camera->pad_view_src);
|
|
camera->pad_view_src = NULL;
|
|
}
|
|
if (camera->pad_src_view) {
|
|
gst_element_release_request_pad (camera->src_out_sel, camera->pad_src_view);
|
|
camera->pad_src_view = NULL;
|
|
}
|
|
|
|
if (camera->srcpad_zoom_filter) {
|
|
gst_object_unref (camera->srcpad_zoom_filter);
|
|
camera->srcpad_zoom_filter = NULL;
|
|
}
|
|
|
|
if (camera->srcpad_videosrc) {
|
|
gst_object_unref (camera->srcpad_videosrc);
|
|
camera->srcpad_videosrc = NULL;
|
|
}
|
|
|
|
camera->view_sink = NULL;
|
|
camera->view_scale = NULL;
|
|
camera->view_in_sel = NULL;
|
|
|
|
camera->src_out_sel = NULL;
|
|
camera->src_filter = NULL;
|
|
camera->src_zoom_crop = NULL;
|
|
camera->src_zoom_scale = NULL;
|
|
camera->src_zoom_filter = NULL;
|
|
camera->src_vid_src = NULL;
|
|
|
|
camera->active_bin = NULL;
|
|
|
|
/* Remove elements */
|
|
gst_camerabin_remove_elements_from_bin (GST_BIN (camera));
|
|
}
|
|
|
|
/*
|
|
* camerabin_dispose_elements:
|
|
* @camera: camerabin object
|
|
*
|
|
* This function releases all allocated camerabin resources.
|
|
*/
|
|
static void
|
|
camerabin_dispose_elements (GstCameraBin * camera)
|
|
{
|
|
if (camera->capture_mutex) {
|
|
g_mutex_free (camera->capture_mutex);
|
|
camera->capture_mutex = NULL;
|
|
}
|
|
if (camera->cond) {
|
|
g_cond_free (camera->cond);
|
|
camera->cond = NULL;
|
|
}
|
|
if (camera->filename) {
|
|
g_string_free (camera->filename, TRUE);
|
|
camera->filename = NULL;
|
|
}
|
|
/* Unref user set elements */
|
|
if (camera->user_vf_sink) {
|
|
gst_object_unref (camera->user_vf_sink);
|
|
camera->user_vf_sink = NULL;
|
|
}
|
|
if (camera->user_vid_src) {
|
|
gst_object_unref (camera->user_vid_src);
|
|
camera->user_vid_src = NULL;
|
|
}
|
|
|
|
if (camera->image_capture_caps) {
|
|
gst_caps_unref (camera->image_capture_caps);
|
|
camera->image_capture_caps = NULL;
|
|
}
|
|
|
|
if (camera->view_finder_caps) {
|
|
gst_caps_unref (camera->view_finder_caps);
|
|
camera->view_finder_caps = NULL;
|
|
}
|
|
|
|
if (camera->allowed_caps) {
|
|
gst_caps_unref (camera->allowed_caps);
|
|
camera->allowed_caps = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_image_capture_continue:
|
|
* @camera: camerabin object
|
|
*
|
|
* Check if application wants to continue image capturing by using g_signal.
|
|
*
|
|
* Returns TRUE if another image should be captured, FALSE otherwise.
|
|
*/
|
|
static gboolean
|
|
gst_camerabin_image_capture_continue (GstCameraBin * camera)
|
|
{
|
|
gchar *filename = NULL;
|
|
gboolean cont = FALSE;
|
|
|
|
/* Check the filename of the written image */
|
|
g_object_get (G_OBJECT (camera->imgbin), "filename", &filename, NULL);
|
|
|
|
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);
|
|
|
|
g_free (filename);
|
|
|
|
GST_DEBUG_OBJECT (camera, "emitted img_done, new filename: %s, continue: %d",
|
|
camera->filename->str, 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) {
|
|
GST_DEBUG_OBJECT (camera, "setting mode: %d", mode);
|
|
/* Interrupt ongoing capture */
|
|
gst_camerabin_do_stop (camera);
|
|
camera->mode = mode;
|
|
if (camera->active_bin) {
|
|
gst_element_set_state (camera->active_bin, GST_STATE_NULL);
|
|
}
|
|
if (camera->mode == MODE_IMAGE) {
|
|
camera->active_bin = camera->imgbin;
|
|
} else if (camera->mode == MODE_VIDEO) {
|
|
camera->active_bin = camera->vidbin;
|
|
}
|
|
gst_camerabin_reset_to_view_finder (camera);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_change_filename:
|
|
* @camera: camerabin object
|
|
* @name: new filename for capture
|
|
*
|
|
* Change filename for image or video capture.
|
|
*/
|
|
static void
|
|
gst_camerabin_change_filename (GstCameraBin * camera, const gchar * name)
|
|
{
|
|
if (0 != strcmp (camera->filename->str, name)) {
|
|
GST_DEBUG_OBJECT (camera, "changing filename from %s to %s",
|
|
camera->filename->str, name);
|
|
g_string_assign (camera->filename, name);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_camerabin_set_photo_iface_zoom (GstCameraBin * camera, gint zoom)
|
|
{
|
|
GstPhotography *photo = NULL;
|
|
GstPhotoCaps pcaps = GST_PHOTOGRAPHY_CAPS_NONE;
|
|
gboolean ret = FALSE;
|
|
|
|
if (GST_IS_ELEMENT (camera->src_vid_src) &&
|
|
gst_element_implements_interface (camera->src_vid_src,
|
|
GST_TYPE_PHOTOGRAPHY)) {
|
|
/* Try setting zoom using photography interface */
|
|
photo = GST_PHOTOGRAPHY (camera->src_vid_src);
|
|
if (photo) {
|
|
pcaps = gst_photography_get_capabilities (photo);
|
|
}
|
|
if (pcaps & GST_PHOTOGRAPHY_CAPS_ZOOM) {
|
|
GST_DEBUG_OBJECT (camera, "setting zoom %d using photography interface",
|
|
zoom);
|
|
ret = gst_photography_set_zoom (photo, (gfloat) zoom / 100.0);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_camerabin_set_element_zoom (GstCameraBin * camera, gint zoom)
|
|
{
|
|
gint w2_crop = 0;
|
|
gint h2_crop = 0;
|
|
GstPad *pad_zoom_sink = NULL;
|
|
gboolean ret = FALSE;
|
|
|
|
if (camera->src_zoom_crop) {
|
|
/* Update capsfilters to apply the zoom */
|
|
GST_INFO_OBJECT (camera, "zoom: %d, orig size: %dx%d", zoom,
|
|
camera->width, camera->height);
|
|
|
|
if (zoom != ZOOM_1X) {
|
|
w2_crop = (camera->width - (camera->width * ZOOM_1X / zoom)) / 2;
|
|
h2_crop = (camera->height - (camera->height * ZOOM_1X / zoom)) / 2;
|
|
}
|
|
|
|
pad_zoom_sink = gst_element_get_static_pad (camera->src_zoom_crop, "sink");
|
|
|
|
GST_INFO_OBJECT (camera,
|
|
"sw cropping: left:%d, right:%d, top:%d, bottom:%d", w2_crop, w2_crop,
|
|
h2_crop, h2_crop);
|
|
|
|
GST_PAD_STREAM_LOCK (pad_zoom_sink);
|
|
g_object_set (camera->src_zoom_crop, "left", w2_crop, "right", w2_crop,
|
|
"top", h2_crop, "bottom", h2_crop, NULL);
|
|
GST_PAD_STREAM_UNLOCK (pad_zoom_sink);
|
|
gst_object_unref (pad_zoom_sink);
|
|
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)
|
|
{
|
|
gint zoom;
|
|
|
|
g_return_if_fail (camera != NULL);
|
|
|
|
zoom = g_atomic_int_get (&camera->zoom);
|
|
|
|
g_return_if_fail (zoom);
|
|
|
|
GST_INFO_OBJECT (camera, "setting zoom %d", zoom);
|
|
|
|
if (gst_camerabin_set_photo_iface_zoom (camera, zoom)) {
|
|
GST_INFO_OBJECT (camera, "zoom set using photography interface");
|
|
} 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;
|
|
gboolean temp_videosrc_pause = FALSE;
|
|
GstElement *videosrc;
|
|
|
|
g_return_val_if_fail (camera != NULL, NULL);
|
|
|
|
videosrc = camera->src_vid_src ? camera->src_vid_src : camera->user_vid_src;
|
|
|
|
if (!videosrc) {
|
|
GST_WARNING_OBJECT (camera, "no videosrc, can't get allowed caps");
|
|
goto failed;
|
|
}
|
|
|
|
if (camera->allowed_caps) {
|
|
GST_DEBUG_OBJECT (camera, "returning cached caps");
|
|
goto done;
|
|
}
|
|
|
|
pad = gst_element_get_static_pad (videosrc, "src");
|
|
|
|
if (!pad) {
|
|
GST_WARNING_OBJECT (camera, "no srcpad in videosrc");
|
|
goto failed;
|
|
}
|
|
|
|
state = GST_STATE (videosrc);
|
|
|
|
/* Make this function work also in READY and NULL state */
|
|
if (state == GST_STATE_READY || state == GST_STATE_NULL) {
|
|
GST_DEBUG_OBJECT (camera, "setting videosrc to paused temporarily");
|
|
temp_videosrc_pause = TRUE;
|
|
peer_pad = gst_pad_get_peer (pad);
|
|
if (peer_pad) {
|
|
gst_pad_unlink (pad, peer_pad);
|
|
}
|
|
/* Set videosrc to PAUSED to open video device */
|
|
gst_element_set_locked_state (videosrc, TRUE);
|
|
gst_element_set_state (videosrc, GST_STATE_PAUSED);
|
|
}
|
|
|
|
camera->allowed_caps = gst_pad_get_caps (pad);
|
|
|
|
/* Restore state and re-link if necessary */
|
|
if (temp_videosrc_pause) {
|
|
GST_DEBUG_OBJECT (camera, "restoring videosrc state %d", state);
|
|
/* Reset videosrc to NULL state, some drivers seem to need this */
|
|
gst_element_set_state (videosrc, GST_STATE_NULL);
|
|
gst_element_set_state (videosrc, state);
|
|
if (peer_pad) {
|
|
gst_pad_link (pad, peer_pad);
|
|
gst_object_unref (peer_pad);
|
|
}
|
|
gst_element_set_locked_state (videosrc, FALSE);
|
|
}
|
|
|
|
gst_object_unref (pad);
|
|
|
|
done:
|
|
if (camera->allowed_caps) {
|
|
caps = gst_caps_copy (camera->allowed_caps);
|
|
}
|
|
failed:
|
|
GST_INFO_OBJECT (camera, "allowed caps:%" GST_PTR_FORMAT, caps);
|
|
return caps;
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_rewrite_tags_to_bin:
|
|
* @bin: bin holding tag setter elements
|
|
* @list: tag list to be written
|
|
*
|
|
* This function looks for certain tag setters from given bin
|
|
* and REPLACES ALL setter tags with given tag list
|
|
*
|
|
*/
|
|
static void
|
|
gst_camerabin_rewrite_tags_to_bin (GstBin * bin, const GstTagList * list)
|
|
{
|
|
GstElement *setter;
|
|
GstElementFactory *setter_factory;
|
|
const gchar *klass;
|
|
GstIterator *iter;
|
|
GstIteratorResult res = GST_ITERATOR_OK;
|
|
gpointer data;
|
|
|
|
iter = gst_bin_iterate_all_by_interface (bin, GST_TYPE_TAG_SETTER);
|
|
|
|
while (res == GST_ITERATOR_OK || res == GST_ITERATOR_RESYNC) {
|
|
res = gst_iterator_next (iter, &data);
|
|
switch (res) {
|
|
case GST_ITERATOR_DONE:
|
|
break;
|
|
case GST_ITERATOR_RESYNC:
|
|
gst_iterator_resync (iter);
|
|
break;
|
|
case GST_ITERATOR_ERROR:
|
|
GST_WARNING ("error iterating tag setters");
|
|
break;
|
|
case GST_ITERATOR_OK:
|
|
setter = GST_ELEMENT (data);
|
|
GST_LOG ("iterating tag setters: %" GST_PTR_FORMAT, setter);
|
|
setter_factory = gst_element_get_factory (setter);
|
|
klass = gst_element_factory_get_klass (setter_factory);
|
|
/* FIXME: check if tags should be written to all tag setters,
|
|
set tags only to Muxer elements for now */
|
|
if (g_strrstr (klass, "Muxer")) {
|
|
GST_DEBUG ("replacement tags %" GST_PTR_FORMAT, list);
|
|
gst_tag_setter_merge_tags (GST_TAG_SETTER (setter), list,
|
|
GST_TAG_MERGE_REPLACE_ALL);
|
|
}
|
|
gst_object_unref (setter);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
gst_iterator_free (iter);
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_get_internal_tags:
|
|
* @camera: the camera bin element
|
|
*
|
|
* Returns tag list containing metadata from camerabin
|
|
* and it's elements
|
|
*/
|
|
static GstTagList *
|
|
gst_camerabin_get_internal_tags (GstCameraBin * camera)
|
|
{
|
|
GstTagList *list = gst_tag_list_new ();
|
|
GstColorBalance *balance = NULL;
|
|
const GList *controls = NULL, *item;
|
|
GstColorBalanceChannel *channel;
|
|
gint min_value, max_value, mid_value, cur_value;
|
|
|
|
|
|
if (camera->active_bin == camera->vidbin) {
|
|
/* FIXME: check if internal video tag setting is needed */
|
|
goto done;
|
|
}
|
|
|
|
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
|
|
"image-width", camera->width, "image-height", camera->height, NULL);
|
|
|
|
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
|
|
"capture-digital-zoom", camera->zoom, 100, NULL);
|
|
|
|
if (gst_element_implements_interface (GST_ELEMENT (camera),
|
|
GST_TYPE_COLOR_BALANCE)) {
|
|
balance = GST_COLOR_BALANCE (camera);
|
|
}
|
|
|
|
if (balance) {
|
|
controls = gst_color_balance_list_channels (balance);
|
|
}
|
|
for (item = controls; item; item = g_list_next (item)) {
|
|
channel = item->data;
|
|
min_value = channel->min_value;
|
|
max_value = channel->max_value;
|
|
/* the default value would probably better */
|
|
mid_value = min_value + ((max_value - min_value) / 2);
|
|
cur_value = gst_color_balance_get_value (balance, channel);
|
|
|
|
if (!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,
|
|
"capture-contrast",
|
|
(cur_value == mid_value) ? 0 : ((cur_value < mid_value) ? 1 : 2),
|
|
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,
|
|
"capture-gain",
|
|
(guint) (cur_value == mid_value) ? 0 : ((cur_value <
|
|
mid_value) ? 1 : 3), NULL);
|
|
} else if (!g_ascii_strcasecmp (channel->label, "saturation")) {
|
|
/* 0 = Normal, 1 = Low, 2 = High */
|
|
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
|
|
"capture-saturation",
|
|
(cur_value == mid_value) ? 0 : ((cur_value < mid_value) ? 1 : 2),
|
|
NULL);
|
|
}
|
|
}
|
|
|
|
done:
|
|
|
|
return list;
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_rewrite_tags:
|
|
* @camera: the camera bin element
|
|
*
|
|
* Merges application set tags to camerabin internal tags,
|
|
* and writes them using image or video bin tag setters.
|
|
*/
|
|
static void
|
|
gst_camerabin_rewrite_tags (GstCameraBin * camera)
|
|
{
|
|
const GstTagList *app_tag_list = NULL;
|
|
GstTagList *list = NULL;
|
|
|
|
/* Get application set tags */
|
|
app_tag_list = gst_tag_setter_get_tag_list (GST_TAG_SETTER (camera));
|
|
|
|
/* Get tags from camerabin and it's elements */
|
|
list = gst_camerabin_get_internal_tags (camera);
|
|
|
|
if (app_tag_list) {
|
|
gst_tag_list_insert (list, app_tag_list, GST_TAG_MERGE_REPLACE);
|
|
}
|
|
|
|
/* Write tags */
|
|
gst_camerabin_rewrite_tags_to_bin (GST_BIN (camera->active_bin), list);
|
|
|
|
gst_tag_list_free (list);
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_set_capsfilter_caps:
|
|
* @camera: camerabin object
|
|
* @new_caps: pointer to caps object to set
|
|
*
|
|
* Set given caps to camerabin capsfilters.
|
|
*/
|
|
static void
|
|
gst_camerabin_set_capsfilter_caps (GstCameraBin * camera, GstCaps * new_caps)
|
|
{
|
|
GstStructure *st;
|
|
|
|
GST_INFO_OBJECT (camera, "new_caps:%" GST_PTR_FORMAT, new_caps);
|
|
|
|
st = gst_caps_get_structure (new_caps, 0);
|
|
|
|
gst_structure_get_int (st, "width", &camera->width);
|
|
gst_structure_get_int (st, "height", &camera->height);
|
|
|
|
if (gst_structure_has_field (st, "framerate")) {
|
|
gst_structure_get_fraction (st, "framerate", &camera->fps_n,
|
|
&camera->fps_d);
|
|
}
|
|
|
|
/* Update zoom */
|
|
gst_camerabin_setup_zoom (camera);
|
|
|
|
/* Update capsfilters */
|
|
g_object_set (G_OBJECT (camera->src_filter), "caps", new_caps, NULL);
|
|
g_object_set (G_OBJECT (camera->src_zoom_filter), "caps", new_caps, NULL);
|
|
gst_camerabin_update_aspect_filter (camera, new_caps);
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_adapt_video_resolution:
|
|
* @camera: camerabin object
|
|
* @caps: caps describing the next incoming buffer format
|
|
*
|
|
* This function adjusts capsfilter and crop elements in order to modify
|
|
* the incoming buffer to the resolution that application requested.
|
|
*
|
|
*/
|
|
static void
|
|
gst_camerabin_adapt_video_resolution (GstCameraBin * camera, GstCaps * caps)
|
|
{
|
|
GstStructure *st;
|
|
gint width = 0, height = 0;
|
|
GstCaps *filter_caps = NULL;
|
|
gint top, bottom, left, right, crop;
|
|
gdouble ratio_w, ratio_h;
|
|
|
|
g_return_if_fail (camera->width != 0 && camera->height != 0);
|
|
|
|
/* Get width and height from caps */
|
|
st = gst_caps_get_structure (caps, 0);
|
|
gst_structure_get_int (st, "width", &width);
|
|
gst_structure_get_int (st, "height", &height);
|
|
|
|
if (width == camera->width && height == camera->height) {
|
|
GST_DEBUG_OBJECT (camera, "no adaptation with resolution needed");
|
|
return;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (camera,
|
|
"changing %dx%d -> %dx%d filter to %" GST_PTR_FORMAT,
|
|
camera->width, camera->height, width, height, camera->src_filter);
|
|
|
|
/* 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, width,
|
|
"height", G_TYPE_INT, height, NULL);
|
|
g_object_set (G_OBJECT (camera->src_filter), "caps", filter_caps, NULL);
|
|
gst_caps_unref (filter_caps);
|
|
|
|
/* Crop if requested aspect ratio differs from incoming frame aspect ratio */
|
|
|
|
/* Don't override original crop values in case we have zoom applied */
|
|
g_object_get (G_OBJECT (camera->src_zoom_crop), "top", &top, "bottom",
|
|
&bottom, "left", &left, "right", &right, NULL);
|
|
|
|
ratio_w = (gdouble) width / camera->width;
|
|
ratio_h = (gdouble) height / camera->height;
|
|
|
|
if (ratio_w < ratio_h) {
|
|
crop = height - (camera->height * ratio_w);
|
|
top += crop / 2;
|
|
bottom += crop / 2;
|
|
} else {
|
|
crop = width - (camera->width * ratio_h);
|
|
left += crop / 2;
|
|
right += crop / 2;
|
|
}
|
|
|
|
GST_INFO_OBJECT (camera,
|
|
"updating crop: left:%d, right:%d, top:%d, bottom:%d", left, right, top,
|
|
bottom);
|
|
g_object_set (G_OBJECT (camera->src_zoom_crop), "top", top, "bottom", bottom,
|
|
"left", left, "right", right, NULL);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
GstStructure *st, *new_st;
|
|
gint i;
|
|
const gchar *field_name;
|
|
gboolean adapt = FALSE;
|
|
|
|
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)) {
|
|
adapt = TRUE;
|
|
/* If capture preparation has added new fields to requested caps,
|
|
we need to copy them */
|
|
st = gst_caps_get_structure (camera->image_capture_caps, 0);
|
|
new_st = gst_structure_copy (st);
|
|
st = gst_caps_get_structure (caps, 0);
|
|
for (i = 0; i < gst_structure_n_fields (st); i++) {
|
|
field_name = gst_structure_nth_field_name (st, i);
|
|
if (!gst_structure_has_field (new_st, field_name)) {
|
|
GST_DEBUG_OBJECT (camera, "new field in prepared caps: %s", field_name);
|
|
gst_structure_set_value (new_st, field_name,
|
|
gst_structure_get_value (st, field_name));
|
|
}
|
|
}
|
|
gst_caps_replace (&camera->image_capture_caps,
|
|
gst_caps_new_full (new_st, NULL));
|
|
}
|
|
|
|
/* Update capsfilters */
|
|
gst_camerabin_set_capsfilter_caps (camera, camera->image_capture_caps);
|
|
|
|
if (adapt) {
|
|
/* If incoming buffer resolution is different from what application
|
|
requested, then we can fix this in camerabin */
|
|
gst_camerabin_adapt_video_resolution (camera, caps);
|
|
}
|
|
g_object_set (G_OBJECT (camera->src_out_sel), "resend-latest", FALSE,
|
|
"active-pad", camera->pad_src_img, NULL);
|
|
gst_camerabin_rewrite_tags (camera);
|
|
gst_element_set_state (GST_ELEMENT (camera->imgbin), GST_STATE_PLAYING);
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_start_image_capture:
|
|
* @camera: camerabin object
|
|
*
|
|
* Initiates image capture.
|
|
*/
|
|
static void
|
|
gst_camerabin_start_image_capture (GstCameraBin * camera)
|
|
{
|
|
GstStateChangeReturn state_ret;
|
|
gboolean wait_for_prepare = FALSE, 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 = gst_caps_copy (camera->view_finder_caps);
|
|
}
|
|
|
|
/* 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) {
|
|
gst_camerabin_rewrite_tags (camera);
|
|
state_ret = gst_element_set_state (camera->imgbin, GST_STATE_PLAYING);
|
|
if (state_ret != GST_STATE_CHANGE_FAILURE) {
|
|
g_mutex_lock (camera->capture_mutex);
|
|
g_object_set (G_OBJECT (camera->src_out_sel), "resend-latest", TRUE,
|
|
"active-pad", camera->pad_src_img, NULL);
|
|
camera->capturing = TRUE;
|
|
ret = TRUE;
|
|
g_mutex_unlock (camera->capture_mutex);
|
|
} else {
|
|
GST_WARNING_OBJECT (camera, "imagebin state change failed");
|
|
gst_element_set_state (camera->imgbin, GST_STATE_NULL);
|
|
}
|
|
}
|
|
|
|
if (!ret) {
|
|
GST_WARNING_OBJECT (camera, "starting image capture failed");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_start_video_recording:
|
|
* @camera: camerabin object
|
|
*
|
|
* Initiates video recording.
|
|
*/
|
|
static void
|
|
gst_camerabin_start_video_recording (GstCameraBin * camera)
|
|
{
|
|
GstStateChangeReturn state_ret;
|
|
/* FIXME: how to ensure resolution and fps is supported by CPU?
|
|
* use a queue overrun signal?
|
|
*/
|
|
GST_INFO_OBJECT (camera, "starting video capture");
|
|
|
|
gst_camerabin_rewrite_tags (camera);
|
|
|
|
/* Pause the pipeline in order to distribute new clock in paused_to_playing */
|
|
/* audio src timestamps will be 0 without state change to READY. ??? */
|
|
gst_element_set_state (GST_ELEMENT (camera), GST_STATE_READY);
|
|
gst_element_set_locked_state (camera->vidbin, FALSE);
|
|
state_ret = gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PAUSED);
|
|
|
|
if (state_ret != GST_STATE_CHANGE_FAILURE) {
|
|
g_mutex_lock (camera->capture_mutex);
|
|
g_object_set (G_OBJECT (camera->src_out_sel), "resend-latest", FALSE,
|
|
"active-pad", camera->pad_src_vid, NULL);
|
|
|
|
/* Enable video mode in v4l2camsrc */
|
|
if (g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src_vid_src),
|
|
"capture-mode")) {
|
|
g_object_set (G_OBJECT (camera->src_vid_src), "capture-mode", 2, NULL);
|
|
}
|
|
|
|
gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PLAYING);
|
|
gst_element_set_locked_state (camera->vidbin, TRUE);
|
|
camera->capturing = TRUE;
|
|
g_mutex_unlock (camera->capture_mutex);
|
|
} else {
|
|
GST_WARNING_OBJECT (camera, "videobin state change failed");
|
|
gst_element_set_state (camera->vidbin, GST_STATE_NULL);
|
|
gst_camerabin_reset_to_view_finder (camera);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_send_video_eos:
|
|
* @camera: camerabin object
|
|
*
|
|
* Generate and send eos event to video bin in order to
|
|
* finish recording properly.
|
|
*/
|
|
static void
|
|
gst_camerabin_send_video_eos (GstCameraBin * camera)
|
|
{
|
|
GstPad *videopad;
|
|
|
|
g_return_if_fail (camera != NULL);
|
|
|
|
/* Send eos event to video bin */
|
|
GST_INFO_OBJECT (camera, "sending eos to videobin");
|
|
videopad = gst_element_get_static_pad (camera->vidbin, "sink");
|
|
gst_pad_send_event (videopad, gst_event_new_eos ());
|
|
gst_object_unref (videopad);
|
|
}
|
|
|
|
/*
|
|
* image_pad_blocked:
|
|
* @pad: pad to block/unblock
|
|
* @blocked: TRUE to block, FALSE to unblock
|
|
* @u_data: camera bin object
|
|
*
|
|
* Sends eos event to image bin if blocking pad leading to image bin.
|
|
* The pad will be unblocked when image bin posts eos message.
|
|
*/
|
|
static void
|
|
image_pad_blocked (GstPad * pad, gboolean blocked, gpointer user_data)
|
|
{
|
|
GstCameraBin *camera;
|
|
|
|
camera = (GstCameraBin *) user_data;
|
|
|
|
GST_DEBUG_OBJECT (camera, "%s %s:%s",
|
|
blocked ? "blocking" : "unblocking", GST_DEBUG_PAD_NAME (pad));
|
|
|
|
if (blocked && (pad == camera->srcpad_videosrc)) {
|
|
/* Send eos and block until image bin reaches eos */
|
|
GST_DEBUG_OBJECT (camera, "sending eos to image bin");
|
|
gst_element_send_event (camera->imgbin, gst_event_new_eos ());
|
|
}
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_have_img_buffer:
|
|
* @pad: output-selector src pad leading to image bin
|
|
* @buffer: still image frame
|
|
* @u_data: camera bin object
|
|
*
|
|
* Buffer probe called before sending each buffer to image bin.
|
|
*
|
|
* First buffer is always passed directly to image bin. Then pad
|
|
* is blocked in order to interleave buffers with eos events.
|
|
* Interleaving eos events and buffers is needed when we have
|
|
* decoupled elements in the image bin capture pipeline.
|
|
* After image bin posts eos message, then pad is unblocked.
|
|
* Next, image bin is changed to READY state in order to save the
|
|
* file and the application is allowed to decide whether to
|
|
* continue image capture. If yes, only then the next buffer is
|
|
* passed to image bin.
|
|
*/
|
|
static gboolean
|
|
gst_camerabin_have_img_buffer (GstPad * pad, GstBuffer * buffer,
|
|
gpointer u_data)
|
|
{
|
|
GstCameraBin *camera = (GstCameraBin *) u_data;
|
|
gboolean ret = TRUE;
|
|
|
|
GST_LOG ("got buffer #%d %p with size %d", camera->num_img_buffers,
|
|
buffer, GST_BUFFER_SIZE (buffer));
|
|
|
|
/* Image filename should be set by now */
|
|
if (g_str_equal (camera->filename->str, "")) {
|
|
GST_DEBUG_OBJECT (camera, "filename not set, dropping buffer");
|
|
ret = FALSE;
|
|
goto done;
|
|
}
|
|
|
|
/* Check for first buffer after capture start, we want to
|
|
pass it forward directly. */
|
|
if (!camera->num_img_buffers) {
|
|
goto done;
|
|
}
|
|
|
|
/* Close the file of saved image */
|
|
gst_element_set_state (camera->imgbin, GST_STATE_READY);
|
|
|
|
/* Reset filename to force application set new filename */
|
|
g_string_assign (camera->filename, "");
|
|
|
|
/* Check if the application wants to continue */
|
|
ret = gst_camerabin_image_capture_continue (camera);
|
|
|
|
if (ret && !camera->stop_requested) {
|
|
GST_DEBUG_OBJECT (camera, "capturing image \"%s\"", camera->filename->str);
|
|
g_object_set (G_OBJECT (camera->imgbin), "filename",
|
|
camera->filename->str, NULL);
|
|
gst_element_set_state (camera->imgbin, GST_STATE_PLAYING);
|
|
} else {
|
|
GST_DEBUG_OBJECT (camera, "not continuing (cont:%d, stop_req:%d)",
|
|
ret, camera->stop_requested);
|
|
|
|
/* Block dataflow to the output-selector to show preview image in
|
|
view finder. Continue and unblock when capture is stopped */
|
|
gst_pad_set_blocked_async (camera->srcpad_zoom_filter, TRUE,
|
|
(GstPadBlockCallback) image_pad_blocked, camera);
|
|
ret = FALSE; /* Drop the buffer */
|
|
|
|
g_mutex_lock (camera->capture_mutex);
|
|
camera->capturing = FALSE;
|
|
g_cond_signal (camera->cond);
|
|
g_mutex_unlock (camera->capture_mutex);
|
|
}
|
|
|
|
done:
|
|
|
|
if (ret) {
|
|
camera->num_img_buffers++;
|
|
/* Block when next buffer arrives, we want to push eos event
|
|
between frames and make sure that eos reaches the filesink
|
|
before processing the next buffer. */
|
|
gst_pad_set_blocked_async (camera->srcpad_videosrc, TRUE,
|
|
(GstPadBlockCallback) image_pad_blocked, camera);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_have_vid_buffer:
|
|
* @pad: output-selector src pad leading to video bin
|
|
* @buffer: buffer pushed to the pad
|
|
* @u_data: camerabin object
|
|
*
|
|
* Buffer probe for src pad leading to video bin.
|
|
* Sends eos event to video bin if stop requested and drops
|
|
* all buffers after this.
|
|
*/
|
|
static gboolean
|
|
gst_camerabin_have_vid_buffer (GstPad * pad, GstBuffer * buffer,
|
|
gpointer u_data)
|
|
{
|
|
GstCameraBin *camera = (GstCameraBin *) u_data;
|
|
gboolean ret = TRUE;
|
|
GST_LOG ("got video buffer %p with size %d",
|
|
buffer, GST_BUFFER_SIZE (buffer));
|
|
if (camera->stop_requested) {
|
|
gst_camerabin_send_video_eos (camera);
|
|
ret = FALSE; /* Drop buffer */
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_reset_to_view_finder:
|
|
* @camera: camerabin object
|
|
*
|
|
* Stop capturing and set camerabin to view finder mode.
|
|
* Reset capture counters and flags.
|
|
*/
|
|
static void
|
|
gst_camerabin_reset_to_view_finder (GstCameraBin * camera)
|
|
{
|
|
GstStateChangeReturn state_ret;
|
|
GST_DEBUG_OBJECT (camera, "resetting");
|
|
|
|
/* Set active bin to READY state */
|
|
if (camera->active_bin) {
|
|
state_ret = gst_element_set_state (camera->active_bin, GST_STATE_READY);
|
|
if (state_ret == GST_STATE_CHANGE_FAILURE) {
|
|
GST_WARNING_OBJECT (camera, "state change failed");
|
|
gst_element_set_state (camera->active_bin, GST_STATE_NULL);
|
|
camera->active_bin = NULL;
|
|
}
|
|
}
|
|
|
|
/* Reset counters and flags */
|
|
camera->num_img_buffers = 0;
|
|
camera->stop_requested = FALSE;
|
|
camera->paused = FALSE;
|
|
|
|
if (camera->src_out_sel) {
|
|
/* Set selector to forward data to view finder */
|
|
g_object_set (G_OBJECT (camera->src_out_sel), "resend-latest", FALSE,
|
|
"active-pad", camera->pad_src_view, NULL);
|
|
}
|
|
|
|
/* Unblock, if dataflow to output-selector is blocked due to image preview */
|
|
if (camera->srcpad_zoom_filter &&
|
|
gst_pad_is_blocked (camera->srcpad_zoom_filter)) {
|
|
gst_pad_set_blocked_async (camera->srcpad_zoom_filter, FALSE,
|
|
(GstPadBlockCallback) image_pad_blocked, camera);
|
|
}
|
|
/* Unblock, if dataflow in videosrc is blocked due to waiting for eos */
|
|
if (camera->srcpad_videosrc && gst_pad_is_blocked (camera->srcpad_videosrc)) {
|
|
gst_pad_set_blocked_async (camera->srcpad_videosrc, FALSE,
|
|
(GstPadBlockCallback) image_pad_blocked, camera);
|
|
}
|
|
|
|
/* Enable view finder mode in v4l2camsrc */
|
|
if (camera->src_vid_src &&
|
|
g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src_vid_src),
|
|
"capture-mode")) {
|
|
g_object_set (G_OBJECT (camera->src_vid_src), "capture-mode", 0, NULL);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (camera, "reset done");
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_do_stop:
|
|
* @camera: camerabin object
|
|
*
|
|
* Raise flag to indicate to image and video bin capture stop.
|
|
* Stopping paused video recording handled as a special case.
|
|
* Wait for ongoing capturing to finish.
|
|
*/
|
|
static void
|
|
gst_camerabin_do_stop (GstCameraBin * camera)
|
|
{
|
|
g_mutex_lock (camera->capture_mutex);
|
|
if (camera->capturing) {
|
|
GST_DEBUG_OBJECT (camera, "mark stop");
|
|
camera->stop_requested = TRUE;
|
|
|
|
/* Take special care when stopping paused video capture */
|
|
if ((camera->active_bin == camera->vidbin) && camera->paused) {
|
|
/* Send eos event to video bin before setting it to playing */
|
|
gst_camerabin_send_video_eos (camera);
|
|
/* We must change to playing now in order to get video bin eos events
|
|
and buffered data through and finish recording properly */
|
|
gst_element_set_state (GST_ELEMENT (camera->vidbin), GST_STATE_PLAYING);
|
|
camera->paused = FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (camera, "waiting for capturing to finish");
|
|
g_cond_wait (camera->cond, camera->capture_mutex);
|
|
GST_DEBUG_OBJECT (camera, "capturing finished");
|
|
}
|
|
g_mutex_unlock (camera->capture_mutex);
|
|
}
|
|
|
|
/*
|
|
* gst_camerabin_default_signal_img_done:
|
|
* @camera: camerabin object
|
|
* @fname: filename of the recently saved image
|
|
*
|
|
* Default handler for #GstCameraBin::img-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");
|
|
comparison = GST_VALUE_LESS_THAN;
|
|
} else {
|
|
GST_LOG_OBJECT (camera, "finding max framerate");
|
|
comparison = GST_VALUE_GREATER_THAN;
|
|
}
|
|
|
|
if (gst_structure_has_field (st, "framerate")) {
|
|
framerate = gst_structure_get_value (st, "framerate");
|
|
/* Handle framerate lists */
|
|
if (GST_VALUE_HOLDS_LIST (framerate)) {
|
|
list_size = gst_value_list_get_size (framerate);
|
|
GST_LOG_OBJECT (camera, "finding framerate from list");
|
|
for (i = 0, i_best = 0; i < list_size; i++) {
|
|
res = gst_value_compare (gst_value_list_get_value (framerate, i),
|
|
gst_value_list_get_value (framerate, i_best));
|
|
if (comparison == res) {
|
|
i_best = i;
|
|
}
|
|
}
|
|
GST_LOG_OBJECT (camera, "found best framerate from index %d", i_best);
|
|
framerate = gst_value_list_get_value (framerate, i_best);
|
|
}
|
|
/* Handle framerate ranges */
|
|
if (GST_VALUE_HOLDS_FRACTION_RANGE (framerate)) {
|
|
if (camera->night_mode) {
|
|
GST_LOG_OBJECT (camera, "getting min framerate from range");
|
|
framerate = gst_value_get_fraction_range_min (framerate);
|
|
} else {
|
|
GST_LOG_OBJECT (camera, "getting max framerate from range");
|
|
framerate = gst_value_get_fraction_range_max (framerate);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Check if we found better framerate */
|
|
if (orig_framerate && framerate) {
|
|
res = gst_value_compare (orig_framerate, framerate);
|
|
if (comparison == res) {
|
|
GST_LOG_OBJECT (camera, "original framerate was the best");
|
|
framerate = orig_framerate;
|
|
}
|
|
}
|
|
|
|
return framerate;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
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 && !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_caps_unref (sink_caps);
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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 = gst_caps_ref (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);
|
|
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 */
|
|
GST_DEBUG_OBJECT (camera, "resetting crop in camerabin");
|
|
g_object_set (camera->src_zoom_crop, "left", 0, "right", 0,
|
|
"top", 0, "bottom", 0, NULL);
|
|
gst_camerabin_set_capsfilter_caps (camera, camera->view_finder_caps);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* GObject callback functions implementation
|
|
*/
|
|
|
|
static void
|
|
gst_camerabin_base_init (gpointer gclass)
|
|
{
|
|
static GstElementDetails element_details = {
|
|
"Camera Bin",
|
|
"Generic/Bin/Camera",
|
|
"Handle lot of features present in DSC",
|
|
"Nokia Corporation <multimedia@maemo.org>\n"
|
|
"Edgard Lima <edgard.lima@indt.org.br>"
|
|
};
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
|
|
|
|
gst_element_class_set_details (element_class, &element_details);
|
|
}
|
|
|
|
static void
|
|
gst_camerabin_class_init (GstCameraBinClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstElementClass *gstelement_class;
|
|
GstBinClass *gstbin_class;
|
|
|
|
gobject_class = G_OBJECT_CLASS (klass);
|
|
gstelement_class = GST_ELEMENT_CLASS (klass);
|
|
gstbin_class = GST_BIN_CLASS (klass);
|
|
|
|
/* gobject */
|
|
|
|
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_camerabin_dispose);
|
|
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_camerabin_finalize);
|
|
|
|
gobject_class->set_property = gst_camerabin_set_property;
|
|
gobject_class->get_property = gst_camerabin_get_property;
|
|
|
|
/**
|
|
* GstCameraBin:filename:
|
|
*
|
|
* Set filename for the still image capturing or video capturing.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_FILENAME,
|
|
g_param_spec_string ("filename", "Filename",
|
|
"Filename of the image or video to save", "", G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin:mode:
|
|
*
|
|
* Set the mode of operation: still image capturing or video recording.
|
|
* Setting the mode will create and destroy image bin or video bin elements
|
|
* according to the mode. You can set this property at any time, changing
|
|
* the mode will stop ongoing capture.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_MODE,
|
|
g_param_spec_enum ("mode", "Mode",
|
|
"The capture mode (still image capture or video recording)",
|
|
GST_TYPE_CAMERABIN_MODE, DEFAULT_MODE, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin:mute:
|
|
*
|
|
* Mute audio in video recording mode.
|
|
* Set this property only when #GstCameraBin is in READY, PAUSED or PLAYING.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_MUTE,
|
|
g_param_spec_boolean ("mute", "Mute",
|
|
"True to mute the recording. False to record with audio",
|
|
ARG_DEFAULT_MUTE, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin:zoom:
|
|
*
|
|
* Set up the zoom applied to the frames.
|
|
* Set this property only when #GstCameraBin is in READY, PAUSED or PLAYING.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_ZOOM,
|
|
g_param_spec_int ("zoom", "Zoom",
|
|
"The zoom. 100 for 1x, 200 for 2x and so on",
|
|
MIN_ZOOM, MAX_ZOOM, DEFAULT_ZOOM, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin:imagepp:
|
|
*
|
|
* Set up an element to do image post processing.
|
|
* This property can only be set while #GstCameraBin is in NULL state.
|
|
* The ownership of the element will be taken by #GstCameraBin.
|
|
*/
|
|
g_object_class_install_property (gobject_class, ARG_IMAGE_POST,
|
|
g_param_spec_object ("imagepp", "Image post processing element",
|
|
"Image Post-Processing GStreamer element (default is NULL)",
|
|
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin:imageenc:
|
|
*
|
|
* Set up an image encoder (for example, jpegenc or pngenc) element.
|
|
* This property can only be set while #GstCameraBin is in NULL state.
|
|
* The ownership of the element will be taken by #GstCameraBin.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_IMAGE_ENC,
|
|
g_param_spec_object ("imageenc", "Image encoder",
|
|
"Image encoder GStreamer element (default is jpegenc)",
|
|
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin:videopp:
|
|
*
|
|
* Set up an element to do video post processing.
|
|
* This property can only be set while #GstCameraBin is in NULL state.
|
|
* The ownership of the element will be taken by #GstCameraBin.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_VIDEO_POST,
|
|
g_param_spec_object ("videopp", "Video post processing element",
|
|
"Video post processing GStreamer element (default is NULL)",
|
|
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin:videoenc:
|
|
*
|
|
* Set up a video encoder element.
|
|
* This property can only be set while #GstCameraBin is in NULL state.
|
|
* The ownership of the element will be taken by #GstCameraBin.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_VIDEO_ENC,
|
|
g_param_spec_object ("videoenc", "Video encoder",
|
|
"Video encoder GStreamer element (default is theoraenc)",
|
|
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin:audioenc:
|
|
*
|
|
* Set up an audio encoder element.
|
|
* This property can only be set while #GstCameraBin is in NULL state.
|
|
* The ownership of the element will be taken by #GstCameraBin.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_AUDIO_ENC,
|
|
g_param_spec_object ("audioenc", "Audio encoder",
|
|
"Audio encoder GStreamer element (default is vorbisenc)",
|
|
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin:videomux:
|
|
*
|
|
* Set up a video muxer element.
|
|
* This property can only be set while #GstCameraBin is in NULL state.
|
|
* The ownership of the element will be taken by #GstCameraBin.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_VIDEO_MUX,
|
|
g_param_spec_object ("videomux", "Video muxer",
|
|
"Video muxer GStreamer element (default is oggmux)",
|
|
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin:vfsink:
|
|
*
|
|
* Set up a sink element to render frames in view finder.
|
|
* By default "autovideosink" will be the sink element.
|
|
* This property can only be set while #GstCameraBin is in NULL state.
|
|
* The ownership of the element will be taken by #GstCameraBin.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_VF_SINK,
|
|
g_param_spec_object ("vfsink", "View finder sink",
|
|
"View finder sink GStreamer element (default is " DEFAULT_VIEW_SINK
|
|
")", GST_TYPE_ELEMENT, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin:videosrc:
|
|
*
|
|
* Set up a video source element.
|
|
* By default "v4l2src" will be the src element.
|
|
* This property can only be set while #GstCameraBin is in NULL state.
|
|
* The ownership of the element will be taken by #GstCameraBin.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_VIDEO_SRC,
|
|
g_param_spec_object ("videosrc", "Video source element",
|
|
"Video source GStreamer element (default is " DEFAULT_SRC_VID_SRC ")",
|
|
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
|
|
/**
|
|
* GstCameraBin:audiosrc:
|
|
*
|
|
* Set up an audio source element.
|
|
* By default "pulsesrc" will be the source element.
|
|
* This property can only be set while #GstCameraBin is in NULL state.
|
|
* The ownership of the element will be taken by #GstCameraBin.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_AUDIO_SRC,
|
|
g_param_spec_object ("audiosrc", "Audio source element",
|
|
"Audio source GStreamer element (default is pulsesrc)",
|
|
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin:inputcaps:
|
|
*
|
|
* The allowed modes of operation of the video source. Have in mind that it
|
|
* doesn't mean #GstCameraBin can operate in all those modes,
|
|
* it depends also on the other elements in the pipeline. Remember to
|
|
* gst_caps_unref after using it.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_INPUT_CAPS,
|
|
g_param_spec_boxed ("inputcaps", "Input caps",
|
|
"The allowed modes of the video source operation",
|
|
GST_TYPE_CAPS, G_PARAM_READABLE));
|
|
|
|
/**
|
|
* GstCameraBin:filter-caps:
|
|
*
|
|
* Filter video source element caps using this property.
|
|
* This is an alternative to #GstCamerabin::user-res-fps action
|
|
* signal that allows more fine grained control of video source.
|
|
*/
|
|
|
|
g_object_class_install_property (gobject_class, ARG_FILTER_CAPS,
|
|
g_param_spec_boxed ("filter-caps", "Filter caps",
|
|
"Capsfilter caps used to control video source operation",
|
|
GST_TYPE_CAPS, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstCameraBin::user-start:
|
|
* @camera: the camera bin element
|
|
*
|
|
* Starts image capture or video recording depending on the Mode.
|
|
* If there is a capture already going on, does nothing.
|
|
* Resumes video recording if it has been paused.
|
|
*/
|
|
|
|
camerabin_signals[USER_START_SIGNAL] =
|
|
g_signal_new ("user-start",
|
|
G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
|
|
G_STRUCT_OFFSET (GstCameraBinClass, user_start),
|
|
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
|
|
|
|
/**
|
|
* GstCameraBin::user-stop:
|
|
* @camera: the camera bin element
|
|
*
|
|
* Stops still image preview, continuous image capture and video
|
|
* recording and returns to the view finder mode.
|
|
*/
|
|
|
|
camerabin_signals[USER_STOP_SIGNAL] =
|
|
g_signal_new ("user-stop",
|
|
G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
|
|
G_STRUCT_OFFSET (GstCameraBinClass, user_stop),
|
|
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
|
|
|
|
/**
|
|
* GstCameraBin::user-pause:
|
|
* @camera: the camera bin element
|
|
*
|
|
* Pauses video recording or resumes paused video recording.
|
|
* If in image mode or not recording, does nothing.
|
|
*/
|
|
|
|
camerabin_signals[USER_PAUSE_SIGNAL] =
|
|
g_signal_new ("user-pause",
|
|
G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
|
|
G_STRUCT_OFFSET (GstCameraBinClass, user_pause),
|
|
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
|
|
|
|
/**
|
|
* GstCameraBin::user-res-fps:
|
|
* @camera: the camera bin element
|
|
* @width: number of horizontal pixels
|
|
* @height: number of vertical pixels
|
|
* @fps_n: frames per second numerator
|
|
* @fps_d: frames per second denominator
|
|
*
|
|
* Changes the frame resolution and frames per second of the video source.
|
|
* The application must be aware of the resolutions supported by the camera.
|
|
* Supported resolutions and frame rates can be get using input-caps property.
|
|
*
|
|
* Setting @fps_n or @fps_d to 0 configures maximum framerate for the
|
|
* given resolution, unless in night mode when minimum is configured.
|
|
*/
|
|
|
|
camerabin_signals[USER_RES_FPS_SIGNAL] =
|
|
g_signal_new ("user-res-fps",
|
|
G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
|
|
G_STRUCT_OFFSET (GstCameraBinClass, user_res_fps),
|
|
NULL, NULL, __gst_camerabin_marshal_VOID__INT_INT_INT_INT, G_TYPE_NONE, 4,
|
|
G_TYPE_INT, G_TYPE_INT, G_TYPE_INT, G_TYPE_INT);
|
|
|
|
/**
|
|
* GstCameraBin::user-image-res:
|
|
* @camera: the camera bin element
|
|
* @width: number of horizontal pixels
|
|
* @height: number of vertical pixels
|
|
*
|
|
* Changes the resolution used for still image capture.
|
|
* Does not affect view finder mode and video recording.
|
|
* Use this action signal in PAUSED or PLAYING state.
|
|
*/
|
|
|
|
camerabin_signals[USER_IMAGE_RES_SIGNAL] =
|
|
g_signal_new ("user-image-res",
|
|
G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
|
|
G_STRUCT_OFFSET (GstCameraBinClass, user_image_res),
|
|
NULL, NULL, __gst_camerabin_marshal_VOID__INT_INT, G_TYPE_NONE, 2,
|
|
G_TYPE_INT, G_TYPE_INT);
|
|
|
|
/**
|
|
* GstCameraBin::img-done:
|
|
* @camera: the camera bin element
|
|
* @filename: the name of the file just saved
|
|
*
|
|
* Signal emitted when the file has just been saved. To continue taking
|
|
* pictures set new filename using #GstCameraBin:filename property and return
|
|
* TRUE, otherwise return FALSE.
|
|
*
|
|
* Don't call any #GstCameraBin method from this signal, if you do so there
|
|
* will be a deadlock.
|
|
*/
|
|
|
|
camerabin_signals[IMG_DONE_SIGNAL] =
|
|
g_signal_new ("img-done", G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstCameraBinClass, img_done),
|
|
g_signal_accumulator_true_handled, NULL,
|
|
__gst_camerabin_marshal_BOOLEAN__STRING, G_TYPE_BOOLEAN, 1,
|
|
G_TYPE_STRING);
|
|
|
|
klass->user_start = gst_camerabin_user_start;
|
|
klass->user_stop = gst_camerabin_user_stop;
|
|
klass->user_pause = gst_camerabin_user_pause;
|
|
klass->user_res_fps = gst_camerabin_user_res_fps;
|
|
klass->user_image_res = gst_camerabin_user_image_res;
|
|
|
|
klass->img_done = gst_camerabin_default_signal_img_done;
|
|
|
|
/* gstelement */
|
|
|
|
gstelement_class->change_state =
|
|
GST_DEBUG_FUNCPTR (gst_camerabin_change_state);
|
|
|
|
/* gstbin */
|
|
/* override handle_message to peek when video or image bin reaches eos */
|
|
gstbin_class->handle_message =
|
|
GST_DEBUG_FUNCPTR (gst_camerabin_handle_message_func);
|
|
|
|
}
|
|
|
|
/* initialize the new element
|
|
* instantiate pads and add them to element
|
|
* set functions
|
|
* initialize structure
|
|
*/
|
|
static void
|
|
gst_camerabin_init (GstCameraBin * camera, GstCameraBinClass * gclass)
|
|
{
|
|
/* GstElementClass *klass = GST_ELEMENT_GET_CLASS (camera); */
|
|
|
|
camera->filename = g_string_new ("");
|
|
camera->mode = DEFAULT_MODE;
|
|
camera->num_img_buffers = 0;
|
|
camera->stop_requested = FALSE;
|
|
camera->paused = FALSE;
|
|
camera->capturing = FALSE;
|
|
camera->night_mode = FALSE;
|
|
|
|
camera->width = DEFAULT_WIDTH;
|
|
camera->height = DEFAULT_HEIGHT;
|
|
camera->fps_n = DEFAULT_FPS_N;
|
|
camera->fps_d = DEFAULT_FPS_D;
|
|
|
|
camera->image_capture_caps = NULL;
|
|
camera->view_finder_caps = NULL;
|
|
camera->allowed_caps = NULL;
|
|
|
|
camera->zoom = DEFAULT_ZOOM;
|
|
|
|
/* concurrency control */
|
|
camera->capture_mutex = g_mutex_new ();
|
|
camera->cond = g_cond_new ();
|
|
|
|
/* pad names for output and input selectors */
|
|
camera->pad_src_view = NULL;
|
|
camera->pad_view_src = NULL;
|
|
camera->pad_src_img = NULL;
|
|
camera->pad_view_img = NULL;
|
|
camera->pad_src_vid = NULL;
|
|
camera->pad_view_vid = NULL;
|
|
|
|
camera->srcpad_zoom_filter = NULL;
|
|
camera->srcpad_videosrc = NULL;
|
|
|
|
/* source elements */
|
|
camera->src_vid_src = NULL;
|
|
camera->src_filter = NULL;
|
|
camera->src_zoom_crop = NULL;
|
|
camera->src_zoom_scale = NULL;
|
|
camera->src_zoom_filter = NULL;
|
|
camera->src_out_sel = NULL;
|
|
|
|
camera->user_vf_sink = NULL;
|
|
|
|
/* image capture bin */
|
|
camera->imgbin = g_object_new (GST_TYPE_CAMERABIN_IMAGE, NULL);
|
|
gst_object_ref (camera->imgbin);
|
|
|
|
/* video capture bin */
|
|
camera->vidbin = g_object_new (GST_TYPE_CAMERABIN_VIDEO, NULL);
|
|
gst_object_ref (camera->vidbin);
|
|
|
|
camera->active_bin = NULL;
|
|
|
|
/* view finder elements */
|
|
camera->view_in_sel = NULL;
|
|
camera->view_scale = NULL;
|
|
camera->view_sink = NULL;
|
|
|
|
memset (&camera->photo_settings, 0, sizeof (GstPhotoSettings));
|
|
}
|
|
|
|
static void
|
|
gst_camerabin_dispose (GObject * object)
|
|
{
|
|
GstCameraBin *camera;
|
|
|
|
camera = GST_CAMERABIN (object);
|
|
|
|
GST_DEBUG_OBJECT (camera, "disposing");
|
|
|
|
gst_element_set_state (camera->imgbin, GST_STATE_NULL);
|
|
gst_object_unref (camera->imgbin);
|
|
|
|
gst_element_set_state (camera->vidbin, GST_STATE_NULL);
|
|
gst_object_unref (camera->vidbin);
|
|
|
|
camerabin_destroy_elements (camera);
|
|
|
|
camerabin_dispose_elements (camera);
|
|
|
|
G_OBJECT_CLASS (parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
gst_camerabin_finalize (GObject * object)
|
|
{
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
gst_camerabin_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstCameraBin *camera = GST_CAMERABIN (object);
|
|
|
|
switch (prop_id) {
|
|
case ARG_MUTE:
|
|
gst_camerabin_video_set_mute (GST_CAMERABIN_VIDEO (camera->vidbin),
|
|
g_value_get_boolean (value));
|
|
break;
|
|
case ARG_ZOOM:
|
|
g_atomic_int_set (&camera->zoom, g_value_get_int (value));
|
|
gst_camerabin_setup_zoom (camera);
|
|
break;
|
|
case ARG_MODE:
|
|
gst_camerabin_change_mode (camera, g_value_get_enum (value));
|
|
break;
|
|
case ARG_FILENAME:
|
|
gst_camerabin_change_filename (camera, g_value_get_string (value));
|
|
break;
|
|
case ARG_VIDEO_POST:
|
|
if (GST_STATE (camera->vidbin) != GST_STATE_NULL) {
|
|
GST_WARNING_OBJECT (camera,
|
|
"can't use set element until next video bin NULL to READY state change");
|
|
}
|
|
gst_camerabin_video_set_post (GST_CAMERABIN_VIDEO (camera->vidbin),
|
|
g_value_get_object (value));
|
|
break;
|
|
case ARG_VIDEO_ENC:
|
|
if (GST_STATE (camera->vidbin) != GST_STATE_NULL) {
|
|
GST_WARNING_OBJECT (camera,
|
|
"can't use set element until next video bin NULL to READY state change");
|
|
}
|
|
gst_camerabin_video_set_video_enc (GST_CAMERABIN_VIDEO (camera->vidbin),
|
|
g_value_get_object (value));
|
|
break;
|
|
case ARG_AUDIO_ENC:
|
|
if (GST_STATE (camera->vidbin) != GST_STATE_NULL) {
|
|
GST_WARNING_OBJECT (camera,
|
|
"can't use set element until next video bin NULL to READY state change");
|
|
}
|
|
gst_camerabin_video_set_audio_enc (GST_CAMERABIN_VIDEO (camera->vidbin),
|
|
g_value_get_object (value));
|
|
break;
|
|
case ARG_VIDEO_MUX:
|
|
if (GST_STATE (camera->vidbin) != GST_STATE_NULL) {
|
|
GST_WARNING_OBJECT (camera->vidbin,
|
|
"can't use set element until next video bin NULL to READY state change");
|
|
}
|
|
gst_camerabin_video_set_muxer (GST_CAMERABIN_VIDEO (camera->vidbin),
|
|
g_value_get_object (value));
|
|
break;
|
|
case ARG_IMAGE_POST:
|
|
if (GST_STATE (camera->imgbin) != GST_STATE_NULL) {
|
|
GST_WARNING_OBJECT (camera,
|
|
"can't use set element until next image bin NULL to READY state change");
|
|
}
|
|
gst_camerabin_image_set_postproc (GST_CAMERABIN_IMAGE (camera->imgbin),
|
|
g_value_get_object (value));
|
|
break;
|
|
case ARG_IMAGE_ENC:
|
|
if (GST_STATE (camera->imgbin) != GST_STATE_NULL) {
|
|
GST_WARNING_OBJECT (camera,
|
|
"can't use set element until next image bin NULL to READY state change");
|
|
}
|
|
gst_camerabin_image_set_encoder (GST_CAMERABIN_IMAGE (camera->imgbin),
|
|
g_value_get_object (value));
|
|
break;
|
|
case ARG_VF_SINK:
|
|
if (GST_STATE (camera) != GST_STATE_NULL) {
|
|
GST_ELEMENT_ERROR (camera, CORE, FAILED,
|
|
("camerabin must be in NULL state when setting the view finder element"),
|
|
(NULL));
|
|
} else {
|
|
if (camera->user_vf_sink)
|
|
gst_object_unref (camera->user_vf_sink);
|
|
camera->user_vf_sink = g_value_get_object (value);
|
|
gst_object_ref (camera->user_vf_sink);
|
|
}
|
|
break;
|
|
case ARG_VIDEO_SRC:
|
|
if (GST_STATE (camera) != GST_STATE_NULL) {
|
|
GST_ELEMENT_ERROR (camera, CORE, FAILED,
|
|
("camerabin must be in NULL state when setting the video source element"),
|
|
(NULL));
|
|
} else {
|
|
if (camera->user_vid_src)
|
|
gst_object_unref (camera->user_vid_src);
|
|
camera->user_vid_src = g_value_get_object (value);
|
|
gst_object_ref (camera->user_vid_src);
|
|
}
|
|
break;
|
|
case ARG_AUDIO_SRC:
|
|
if (GST_STATE (camera->vidbin) != GST_STATE_NULL) {
|
|
GST_WARNING_OBJECT (camera,
|
|
"can't use set element until next video bin NULL to READY state change");
|
|
}
|
|
gst_camerabin_video_set_audio_src (GST_CAMERABIN_VIDEO (camera->vidbin),
|
|
g_value_get_object (value));
|
|
break;
|
|
case ARG_FILTER_CAPS:
|
|
GST_OBJECT_LOCK (camera);
|
|
if (camera->view_finder_caps) {
|
|
gst_caps_unref (camera->view_finder_caps);
|
|
}
|
|
camera->view_finder_caps = gst_caps_copy (gst_value_get_caps (value));
|
|
GST_OBJECT_UNLOCK (camera);
|
|
gst_camerabin_set_capsfilter_caps (camera, camera->view_finder_caps);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_camerabin_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstCameraBin *camera = GST_CAMERABIN (object);
|
|
|
|
switch (prop_id) {
|
|
case ARG_FILENAME:
|
|
g_value_set_string (value, camera->filename->str);
|
|
break;
|
|
case ARG_MODE:
|
|
g_value_set_enum (value, camera->mode);
|
|
break;
|
|
case ARG_MUTE:
|
|
g_value_set_boolean (value,
|
|
gst_camerabin_video_get_mute (GST_CAMERABIN_VIDEO (camera->vidbin)));
|
|
break;
|
|
case ARG_ZOOM:
|
|
g_value_set_int (value, g_atomic_int_get (&camera->zoom));
|
|
break;
|
|
case ARG_IMAGE_POST:
|
|
g_value_set_object (value,
|
|
gst_camerabin_image_get_postproc (GST_CAMERABIN_IMAGE
|
|
(camera->imgbin)));
|
|
break;
|
|
case ARG_IMAGE_ENC:
|
|
g_value_set_object (value,
|
|
gst_camerabin_image_get_encoder (GST_CAMERABIN_IMAGE
|
|
(camera->imgbin)));
|
|
break;
|
|
case ARG_VIDEO_POST:
|
|
g_value_set_object (value,
|
|
gst_camerabin_video_get_post (GST_CAMERABIN_VIDEO (camera->vidbin)));
|
|
break;
|
|
case ARG_VIDEO_ENC:
|
|
g_value_set_object (value,
|
|
gst_camerabin_video_get_video_enc (GST_CAMERABIN_VIDEO
|
|
(camera->vidbin)));
|
|
break;
|
|
case ARG_AUDIO_ENC:
|
|
g_value_set_object (value,
|
|
gst_camerabin_video_get_audio_enc (GST_CAMERABIN_VIDEO
|
|
(camera->vidbin)));
|
|
break;
|
|
case ARG_VIDEO_MUX:
|
|
g_value_set_object (value,
|
|
gst_camerabin_video_get_muxer (GST_CAMERABIN_VIDEO (camera->vidbin)));
|
|
break;
|
|
case ARG_VF_SINK:
|
|
g_value_set_object (value, camera->user_vf_sink);
|
|
break;
|
|
case ARG_VIDEO_SRC:
|
|
g_value_set_object (value, camera->src_vid_src);
|
|
break;
|
|
case ARG_AUDIO_SRC:
|
|
g_value_set_object (value,
|
|
gst_camerabin_video_get_audio_src (GST_CAMERABIN_VIDEO
|
|
(camera->vidbin)));
|
|
break;
|
|
case ARG_INPUT_CAPS:
|
|
gst_value_set_caps (value, gst_camerabin_get_allowed_input_caps (camera));
|
|
break;
|
|
case ARG_FILTER_CAPS:
|
|
gst_value_set_caps (value, camera->view_finder_caps);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* GstElement functions implementation
|
|
*/
|
|
|
|
static GstStateChangeReturn
|
|
gst_camerabin_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstCameraBin *camera = GST_CAMERABIN (element);
|
|
GstStateChangeReturn ret;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
if (!camerabin_create_elements (camera)) {
|
|
ret = GST_STATE_CHANGE_FAILURE;
|
|
goto done;
|
|
}
|
|
/* Lock to control image and video bin state separately
|
|
from view finder */
|
|
gst_element_set_locked_state (camera->imgbin, TRUE);
|
|
gst_element_set_locked_state (camera->vidbin, TRUE);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
camerabin_setup_src_elements (camera);
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
/* If using autovideosink, set view finder sink properties
|
|
now that actual sink has been created. */
|
|
camerabin_setup_view_elements (camera);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
gst_element_set_locked_state (camera->imgbin, FALSE);
|
|
gst_element_set_locked_state (camera->vidbin, FALSE);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
GST_LOG_OBJECT (camera, "PAUSED to READY");
|
|
g_mutex_lock (camera->capture_mutex);
|
|
if (camera->capturing) {
|
|
GST_WARNING_OBJECT (camera, "was capturing when changing to READY");
|
|
camera->capturing = FALSE;
|
|
/* Reset capture and don't wait for capturing to finish properly.
|
|
Proper capturing should have been finished before going to READY. */
|
|
gst_camerabin_reset_to_view_finder (camera);
|
|
g_cond_signal (camera->cond);
|
|
}
|
|
g_mutex_unlock (camera->capture_mutex);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
camerabin_destroy_elements (camera);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
done:
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* GstBin functions implementation
|
|
*/
|
|
|
|
/* Peek eos messages but don't interfere with bin msg handling */
|
|
static void
|
|
gst_camerabin_handle_message_func (GstBin * bin, GstMessage * msg)
|
|
{
|
|
GstCameraBin *camera = GST_CAMERABIN (bin);
|
|
|
|
switch (GST_MESSAGE_TYPE (msg)) {
|
|
case GST_MESSAGE_EOS:
|
|
if (GST_MESSAGE_SRC (msg) == GST_OBJECT (camera->vidbin)) {
|
|
/* Video eos */
|
|
GST_DEBUG_OBJECT (camera,
|
|
"got video eos message, stopping video capture");
|
|
g_mutex_lock (camera->capture_mutex);
|
|
camera->capturing = FALSE;
|
|
g_cond_signal (camera->cond);
|
|
g_mutex_unlock (camera->capture_mutex);
|
|
} else if (GST_MESSAGE_SRC (msg) == GST_OBJECT (camera->imgbin)) {
|
|
/* Image eos */
|
|
GST_DEBUG_OBJECT (camera, "got image eos message");
|
|
|
|
gst_camerabin_finish_image_capture (camera);
|
|
|
|
/* Unblock pad to process next buffer */
|
|
gst_pad_set_blocked_async (camera->srcpad_videosrc, FALSE,
|
|
(GstPadBlockCallback) image_pad_blocked, camera);
|
|
}
|
|
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) {
|
|
gst_camerabin_finish_image_capture (camera);
|
|
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_user_start (GstCameraBin * camera)
|
|
{
|
|
|
|
GST_INFO_OBJECT (camera, "starting capture");
|
|
if (camera->paused) {
|
|
gst_camerabin_user_pause (camera);
|
|
return;
|
|
}
|
|
|
|
if (!camera->active_bin) {
|
|
GST_INFO_OBJECT (camera, "mode not explicitly set by application");
|
|
gst_camerabin_change_mode (camera, camera->mode);
|
|
}
|
|
|
|
if (g_str_equal (camera->filename->str, "")) {
|
|
GST_ELEMENT_ERROR (camera, CORE, FAILED,
|
|
("set filename before starting capture"), (NULL));
|
|
return;
|
|
}
|
|
|
|
g_mutex_lock (camera->capture_mutex);
|
|
if (camera->capturing) {
|
|
GST_WARNING_OBJECT (camera, "capturing \"%s\" ongoing, set new filename",
|
|
camera->filename->str);
|
|
g_mutex_unlock (camera->capture_mutex);
|
|
return;
|
|
}
|
|
g_mutex_unlock (camera->capture_mutex);
|
|
|
|
if (camera->active_bin) {
|
|
g_object_set (G_OBJECT (camera->active_bin), "filename",
|
|
camera->filename->str, NULL);
|
|
|
|
if (camera->active_bin == camera->imgbin) {
|
|
gst_camerabin_start_image_capture (camera);
|
|
} else if (camera->active_bin == camera->vidbin) {
|
|
gst_camerabin_start_video_recording (camera);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_camerabin_user_stop (GstCameraBin * camera)
|
|
{
|
|
GST_INFO_OBJECT (camera, "stopping %s capture",
|
|
camera->mode ? "video" : "image");
|
|
gst_camerabin_do_stop (camera);
|
|
gst_camerabin_reset_to_view_finder (camera);
|
|
}
|
|
|
|
static void
|
|
gst_camerabin_user_pause (GstCameraBin * camera)
|
|
{
|
|
if (camera->active_bin == camera->vidbin) {
|
|
if (!camera->paused) {
|
|
GST_INFO_OBJECT (camera, "pausing capture");
|
|
|
|
/* Bring all camerabin elements to PAUSED */
|
|
gst_element_set_locked_state (camera->vidbin, FALSE);
|
|
gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PAUSED);
|
|
|
|
/* Switch to view finder mode */
|
|
g_object_set (G_OBJECT (camera->src_out_sel), "resend-latest", FALSE,
|
|
"active-pad", camera->pad_src_view, NULL);
|
|
|
|
/* Enable view finder mode in v4l2camsrc */
|
|
if (g_object_class_find_property (G_OBJECT_GET_CLASS
|
|
(camera->src_vid_src), "capture-mode")) {
|
|
g_object_set (G_OBJECT (camera->src_vid_src), "capture-mode", 0, NULL);
|
|
}
|
|
|
|
/* Set view finder to PLAYING and leave videobin PAUSED */
|
|
gst_element_set_locked_state (camera->vidbin, TRUE);
|
|
gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PLAYING);
|
|
|
|
camera->paused = TRUE;
|
|
} else {
|
|
GST_INFO_OBJECT (camera, "unpausing capture");
|
|
|
|
/* Bring all camerabin elements to PAUSED */
|
|
gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PAUSED);
|
|
|
|
/* Switch to video recording mode */
|
|
g_object_set (G_OBJECT (camera->src_out_sel), "resend-latest", TRUE,
|
|
"active-pad", camera->pad_src_vid, NULL);
|
|
|
|
/* Enable video recording mode in v4l2camsrc */
|
|
if (g_object_class_find_property (G_OBJECT_GET_CLASS
|
|
(camera->src_vid_src), "capture-mode")) {
|
|
g_object_set (G_OBJECT (camera->src_vid_src), "capture-mode", 2, NULL);
|
|
}
|
|
|
|
/* Bring all camerabin elements to PLAYING */
|
|
gst_element_set_locked_state (camera->vidbin, FALSE);
|
|
gst_element_set_state (GST_ELEMENT (camera), GST_STATE_PLAYING);
|
|
gst_element_set_locked_state (camera->vidbin, TRUE);
|
|
|
|
camera->paused = FALSE;
|
|
}
|
|
GST_DEBUG_OBJECT (camera, "pause done");
|
|
} else {
|
|
GST_WARNING ("pausing in image capture mode disabled");
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_camerabin_user_res_fps (GstCameraBin * camera, gint width, gint height,
|
|
gint fps_n, gint fps_d)
|
|
{
|
|
GstState state, pending;
|
|
|
|
GST_INFO_OBJECT (camera, "switching resolution to %dx%d and fps to %d/%d",
|
|
width, height, fps_n, 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");
|
|
gst_element_set_state (GST_ELEMENT (camera), GST_STATE_READY);
|
|
}
|
|
camera->width = width;
|
|
camera->height = height;
|
|
camera->fps_n = fps_n;
|
|
camera->fps_d = fps_d;
|
|
if (pending != GST_STATE_VOID_PENDING) {
|
|
GST_LOG_OBJECT (camera, "restoring pending state: %s",
|
|
gst_element_state_get_name (pending));
|
|
state = pending;
|
|
}
|
|
gst_element_set_state (GST_ELEMENT (camera), state);
|
|
}
|
|
|
|
static void
|
|
gst_camerabin_user_image_res (GstCameraBin * camera, gint width, gint height)
|
|
{
|
|
GstStructure *structure;
|
|
GstCaps *new_caps = NULL;
|
|
|
|
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);
|
|
}
|
|
|
|
/* 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)
|