gstreamer/gst-libs/gst/interfaces/photography.c
Lasse Laukkanen 617f34895c photo iface: Add caps object to preparation API for requested and actual capture format
Allow requesting of certain format with prepare_for_capture() and return
the actual format in GstPhotoCapturePrepared callback.
2009-02-23 14:20:12 +02:00

371 lines
10 KiB
C

/* GStreamer
*
* Copyright (C) 2008 Nokia Corporation <multimedia@maemo.org>
*
* photography.c: photography interface for digital imaging
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "photography.h"
/**
* SECTION:photography
* @short_description: Interface for elements having digital imaging controls
*
* The interface allows access to some common digital imaging controls
*/
static void gst_photography_iface_init (GstPhotographyInterface * iface);
GType
gst_photography_get_type (void)
{
static GType gst_photography_type = 0;
if (!gst_photography_type) {
static const GTypeInfo gst_photography_info = {
sizeof (GstPhotographyInterface),
(GBaseInitFunc) gst_photography_iface_init,
NULL,
NULL,
NULL,
NULL,
0,
0,
NULL,
};
gst_photography_type = g_type_register_static (G_TYPE_INTERFACE,
"GstPhotography", &gst_photography_info, 0);
g_type_interface_add_prerequisite (gst_photography_type,
GST_TYPE_IMPLEMENTS_INTERFACE);
}
return gst_photography_type;
}
static void
gst_photography_iface_init (GstPhotographyInterface * iface)
{
/* default virtual functions */
iface->get_ev_compensation = NULL;
iface->get_iso_speed = NULL;
iface->get_aperture = NULL;
iface->get_exposure = NULL;
iface->get_white_balance_mode = NULL;
iface->get_colour_tone_mode = NULL;
iface->get_scene_mode = NULL;
iface->get_flash_mode = NULL;
iface->get_zoom = NULL;
iface->set_ev_compensation = NULL;
iface->set_iso_speed = NULL;
iface->set_aperture = NULL;
iface->set_exposure = NULL;
iface->set_white_balance_mode = NULL;
iface->set_colour_tone_mode = NULL;
iface->set_scene_mode = NULL;
iface->set_flash_mode = NULL;
iface->set_zoom = NULL;
iface->get_capabilities = NULL;
iface->prepare_for_capture = NULL;
iface->set_autofocus = NULL;
}
#define GST_PHOTOGRAPHY_FUNC_TEMPLATE(function_name, param_type) \
gboolean \
gst_photography_set_ ## function_name (GstPhotography * photo, param_type param) \
{ \
GstPhotographyInterface *iface; \
g_return_val_if_fail (photo != NULL, FALSE); \
iface = GST_PHOTOGRAPHY_GET_IFACE (photo); \
if (iface->set_ ## function_name) { \
return iface->set_ ## function_name (photo, param); \
} \
return FALSE; \
} \
gboolean \
gst_photography_get_ ## function_name (GstPhotography * photo, param_type * param) \
{ \
GstPhotographyInterface *iface; \
g_return_val_if_fail (photo != NULL, FALSE); \
iface = GST_PHOTOGRAPHY_GET_IFACE (photo); \
if (iface->get_ ## function_name) { \
return iface->get_ ## function_name (photo, param); \
} \
return FALSE; \
}
/**
* gst_photography_set_ev_compensation:
* @photo: #GstPhotography interface of a #GstElement
* @ev_comp: ev compensation value to set
*
* Set the ev compensation value for the #GstElement
*
* Returns: %TRUE if setting the value succeeded, %FALSE otherwise
*/
/**
* gst_photography_get_ev_compensation:
* @photo: #GstPhotography interface of a #GstElement
* @ev_comp: ev compensation value to get
*
* Get the ev compensation value for the #GstElement
*
* Returns: %TRUE if getting the value succeeded, %FALSE otherwise
*/
GST_PHOTOGRAPHY_FUNC_TEMPLATE (ev_compensation, gfloat);
/**
* gst_photography_set_iso_speed:
* @photo: #GstPhotography interface of a #GstElement
* @iso_speed: ISO speed value to set
*
* Set the ISO value (light sensivity) for the #GstElement
*
* Returns: %TRUE if setting the value succeeded, %FALSE otherwise
*/
/**
* gst_photography_get_iso_speed:
* @photo: #GstPhotography interface of a #GstElement
* @iso_speed: ISO speed value to get
*
* Get the ISO value (light sensivity) for the #GstElement
*
* Returns: %TRUE if getting the value succeeded, %FALSE otherwise
*/
GST_PHOTOGRAPHY_FUNC_TEMPLATE (iso_speed, guint);
/**
* gst_photography_set_aperture:
* @photo: #GstPhotography interface of a #GstElement
* @aperture: aperture value to set
*
* Set the aperture value for the #GstElement
*
* Returns: %TRUE if setting the value succeeded, %FALSE otherwise
*/
/**
* gst_photography_get_aperture:
* @photo: #GstPhotography interface of a #GstElement
* @aperture: aperture value to get
*
* Get the aperture value for the #GstElement
*
* Returns: %TRUE if getting the value succeeded, %FALSE otherwise
*/
GST_PHOTOGRAPHY_FUNC_TEMPLATE (aperture, guint);
/**
* gst_photography_set_exposure:
* @photo: #GstPhotography interface of a #GstElement
* @exposure: exposure time to set
*
* Set the fixed exposure time (in us) for the #GstElement
*
* Returns: %TRUE if setting the value succeeded, %FALSE otherwise
*/
/**
* gst_photography_get_exposure:
* @photo: #GstPhotography interface of a #GstElement
* @exposure: exposure time to get
*
* Get the fixed exposure time (in us) for the #GstElement
*
* Returns: %TRUE if getting the value succeeded, %FALSE otherwise
*/
GST_PHOTOGRAPHY_FUNC_TEMPLATE (exposure, guint32);
/**
* gst_photography_set_white_balance_mode:
* @photo: #GstPhotography interface of a #GstElement
* @wb_mode: #GstWhiteBalanceMode to set
*
* Set the white balance mode for the #GstElement
*
* Returns: %TRUE if setting the value succeeded, %FALSE otherwise
*/
/**
* gst_photography_get_white_balance_mode:
* @photo: #GstPhotography interface of a #GstElement
* @wb_mode: #GstWhiteBalanceMode to get
*
* Get the white balance mode for the #GstElement
*
* Returns: %TRUE if getting the value succeeded, %FALSE otherwise
*/
GST_PHOTOGRAPHY_FUNC_TEMPLATE (white_balance_mode, GstWhiteBalanceMode);
/**
* gst_photography_set_colour_tone_mode:
* @photo: #GstPhotography interface of a #GstElement
* @tone_mode: #GstColourToneMode to set
*
* Set the colour tone mode for the #GstElement
*
* Returns: %TRUE if setting the value succeeded, %FALSE otherwise
*/
/**
* gst_photography_get_colour_tone_mode:
* @photo: #GstPhotography interface of a #GstElement
* @tone_mode: #GstColourToneMode to get
*
* Get the colour tone mode for the #GstElement
*
* Returns: %TRUE if getting the value succeeded, %FALSE otherwise
*/
GST_PHOTOGRAPHY_FUNC_TEMPLATE (colour_tone_mode, GstColourToneMode);
/**
* gst_photography_set_scene_mode:
* @photo: #GstPhotography interface of a #GstElement
* @scene_mode: #GstSceneMode to set
*
* Set the scene mode for the #GstElement
*
* Returns: %TRUE if setting the value succeeded, %FALSE otherwise
*/
/**
* gst_photography_get_scene_mode:
* @photo: #GstPhotography interface of a #GstElement
* @scene_mode: #GstSceneMode to get
*
* Get the scene mode for the #GstElement
*
* Returns: %TRUE if getting the value succeeded, %FALSE otherwise
*/
GST_PHOTOGRAPHY_FUNC_TEMPLATE (scene_mode, GstSceneMode);
/**
* gst_photography_set_flash_mode:
* @photo: #GstPhotography interface of a #GstElement
* @flash_mode: #GstFlashMode to set
*
* Set the flash mode for the #GstElement
*
* Returns: %TRUE if setting the value succeeded, %FALSE otherwise
*/
/**
* gst_photography_get_flash_mode:
* @photo: #GstPhotography interface of a #GstElement
* @flash_mode: #GstFlashMode to get
*
* Get the flash mode for the #GstElement
*
* Returns: %TRUE if getting the value succeeded, %FALSE otherwise
*/
GST_PHOTOGRAPHY_FUNC_TEMPLATE (flash_mode, GstFlashMode);
/**
* gst_photography_set_zoom:
* @photo: #GstPhotography interface of a #GstElement
* @zoom: zoom value to set
*
* Set the zoom value for the #GstElement.
* E.g. 1.0 to get original image and 3.0 for 3x zoom and so on.
*
* Returns: %TRUE if setting the value succeeded, %FALSE otherwise
*/
/**
* gst_photography_get_zoom:
* @photo: #GstPhotography interface of a #GstElement
* @zoom: zoom value to get
*
* Get the zoom value for the #GstElement
*
* Returns: %TRUE if getting the value succeeded, %FALSE otherwise
*/
GST_PHOTOGRAPHY_FUNC_TEMPLATE (zoom, gfloat);
/**
* gst_photography_get_capabilities:
* @photo: #GstPhotography interface of a #GstElement
*
* Get #GstPhotoCaps bitmask value that indicates what photography
* interface features the #GstElement supports
*
* Returns: #GstPhotoCaps value
*/
GstPhotoCaps
gst_photography_get_capabilities (GstPhotography * photo)
{
GstPhotographyInterface *iface;
g_return_val_if_fail (photo != NULL, GST_PHOTOGRAPHY_CAPS_NONE);
iface = GST_PHOTOGRAPHY_GET_IFACE (photo);
if (iface->get_capabilities) {
return iface->get_capabilities (photo);
} else {
return GST_PHOTOGRAPHY_CAPS_NONE;
}
}
/**
* gst_photography_prepare_for_capture:
* @photo: #GstPhotography interface of a #GstElement
* @func: callback that is called after capturing has been prepared
* @caps: #GstCaps defining the desired format of the captured image
* @user_data: user data that will be passed to the callback @func
*
* Start preparations for capture. @func callback is called after
* preparations are done.
*
* Returns: TRUE if preparations were started (caps were OK), otherwise FALSE.
*/
gboolean
gst_photography_prepare_for_capture (GstPhotography * photo,
GstPhotoCapturePrepared func, GstCaps * capture_caps, gpointer user_data)
{
GstPhotographyInterface *iface;
gboolean ret = TRUE;
g_return_val_if_fail (photo != NULL, FALSE);
iface = GST_PHOTOGRAPHY_GET_IFACE (photo);
if (iface->prepare_for_capture) {
ret = iface->prepare_for_capture (photo, func, capture_caps, user_data);
}
return ret;
}
/**
* gst_photography_set_autofocus:
* @photo: #GstPhotography interface of a #GstElement
* @on: %TRUE to start autofocusing, %FALSE to stop autofocusing
*
* Start or stop autofocusing. %GST_PHOTOGRAPHY_AUTOFOCUS_DONE
* message is posted to bus when autofocusing has finished.
*/
void
gst_photography_set_autofocus (GstPhotography * photo, gboolean on)
{
GstPhotographyInterface *iface;
g_return_if_fail (photo != NULL);
iface = GST_PHOTOGRAPHY_GET_IFACE (photo);
if (iface->set_autofocus) {
iface->set_autofocus (photo, on);
}
}