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photo iface: Add caps object to preparation API for requested and actual capture format

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Allow requesting of certain format with prepare_for_capture() and return
the actual format in GstPhotoCapturePrepared callback.
This commit is contained in:
Lasse Laukkanen 2009-02-20 12:03:03 +02:00 committed by René Stadler
parent 0456f92b77
commit 617f34895c
2 changed files with 19 additions and 9 deletions
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15
gst-libs/gst/interfaces/photography.c
View file

@ -325,22 +325,29 @@ gst_photography_get_capabilities (GstPhotography * photo)
* 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.
*/
void
gboolean
gst_photography_prepare_for_capture (GstPhotography * photo,
GstPhotoCapturePrepared func, gpointer user_data)
GstPhotoCapturePrepared func, GstCaps * capture_caps, gpointer user_data)
{
GstPhotographyInterface *iface;
g_return_if_fail (photo != NULL);
gboolean ret = TRUE;
g_return_val_if_fail (photo != NULL, FALSE);
iface = GST_PHOTOGRAPHY_GET_IFACE (photo);
if (iface->prepare_for_capture) {
iface->prepare_for_capture (photo, func, user_data);
ret = iface->prepare_for_capture (photo, func, capture_caps, user_data);
}
return ret;
}
/**

13
gst-libs/gst/interfaces/photography.h
View file

@ -143,11 +143,14 @@ typedef struct
/**
* GstPhotoCapturePrepared:
* @data: user data that has been given, when registering the callback
* @configured_caps: #GstCaps defining the configured capture format.
* Ownership of these caps stays in the element.
*
* This callback will be called when the element has finished preparations
* for photo capture.
*/
typedef void (*GstPhotoCapturePrepared) (gpointer data);
typedef void (*GstPhotoCapturePrepared) (gpointer data,
const GstCaps *configured_caps);
/**
* GstPhotographyInterface:
@ -210,8 +213,8 @@ typedef struct _GstPhotographyInterface
gboolean (*set_zoom) (GstPhotography * photo, gfloat zoom);
GstPhotoCaps (*get_capabilities) (GstPhotography * photo);
void (*prepare_for_capture) (GstPhotography * photo,
GstPhotoCapturePrepared func, gpointer user_data);
gboolean (*prepare_for_capture) (GstPhotography * photo,
GstPhotoCapturePrepared func, GstCaps *capture_caps, gpointer user_data);
void (*set_autofocus) (GstPhotography * photo, gboolean on);
/*< private > */
@ -257,8 +260,8 @@ gboolean gst_photography_set_zoom (GstPhotography * photo, gfloat zoom);
GstPhotoCaps gst_photography_get_capabilities (GstPhotography * photo);
void gst_photography_prepare_for_capture (GstPhotography * photo,
GstPhotoCapturePrepared func, gpointer user_data);
gboolean gst_photography_prepare_for_capture (GstPhotography * photo,
GstPhotoCapturePrepared func, GstCaps *capture_caps, gpointer user_data);
void gst_photography_set_autofocus (GstPhotography * photo, gboolean on);