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filter: add support for frame cropping.

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Frame cropping is defined with a GstVaapiRectangle value. The default
behaviour is to treat the source surface as a whole
This commit is contained in:
Gwenole Beauchesne 2013-07-24 14:22:28 +02:00
parent 87c8d28499
commit 81395418e9
3 changed files with 69 additions and 4 deletions
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1
docs/reference/libs/libs-sections.txt
View file

@ -386,6 +386,7 @@ gst_vaapi_filter_get_operations
gst_vaapi_filter_get_formats
gst_vaapi_filter_set_operation
gst_vaapi_filter_set_format
gst_vaapi_filter_set_cropping_rectangle
<SUBSECTION Standard>
GST_VAAPI_FILTER
</SECTION>

66
gst-libs/gst/vaapi/gstvaapifilter.c
View file

@ -22,6 +22,7 @@
#include "sysdeps.h"
#include "gstvaapifilter.h"
#include "gstvaapiutils.h"
#include "gstvaapivalue.h"
#include "gstvaapiminiobject.h"
#include "gstvaapidisplay_priv.h"
#include "gstvaapisurface_priv.h"
@ -62,6 +63,8 @@ struct _GstVaapiFilter {
GPtrArray *operations;
GstVideoFormat format;
GArray *formats;
GstVaapiRectangle crop_rect;
guint use_crop_rect : 1;
};
/* ------------------------------------------------------------------------- */
@ -178,6 +181,7 @@ enum {
PROP_0,
PROP_FORMAT = GST_VAAPI_FILTER_OP_FORMAT,
PROP_CROP = GST_VAAPI_FILTER_OP_CROP,
N_PROPERTIES
};
@ -200,6 +204,18 @@ init_properties(void)
GST_TYPE_VIDEO_FORMAT,
DEFAULT_FORMAT,
G_PARAM_READWRITE);
/**
* GstVaapiFilter:crop-rect:
*
* The cropping rectangle, expressed as a #GstVaapiRectangle.
*/
g_properties[PROP_CROP] =
g_param_spec_boxed("crop-rect",
"Cropping Rectangle",
"The cropping rectangle",
GST_VAAPI_TYPE_RECTANGLE,
G_PARAM_READWRITE);
}
static void
@ -234,6 +250,7 @@ op_data_new(GstVaapiFilterOp op, GParamSpec *pspec)
switch (op) {
case GST_VAAPI_FILTER_OP_FORMAT:
case GST_VAAPI_FILTER_OP_CROP:
op_data->va_type = VAProcFilterNone;
break;
default:
@ -776,6 +793,9 @@ gst_vaapi_filter_set_operation(GstVaapiFilter *filter, GstVaapiFilterOp op,
case GST_VAAPI_FILTER_OP_FORMAT:
return gst_vaapi_filter_set_format(filter, value ?
g_value_get_enum(value) : DEFAULT_FORMAT);
case GST_VAAPI_FILTER_OP_CROP:
return gst_vaapi_filter_set_cropping_rectangle(filter, value ?
g_value_get_boxed(value) : NULL);
default:
break;
}
@ -813,10 +833,26 @@ gst_vaapi_filter_process_unlocked(GstVaapiFilter *filter,
if (!ensure_operations(filter))
return GST_VAAPI_FILTER_STATUS_ERROR_ALLOCATION_FAILED;
src_rect.x = 0;
src_rect.y = 0;
src_rect.width = GST_VAAPI_SURFACE_WIDTH(src_surface);
src_rect.height = GST_VAAPI_SURFACE_HEIGHT(src_surface);
if (filter->use_crop_rect) {
const GstVaapiRectangle * const crop_rect = &filter->crop_rect;
if ((crop_rect->x + crop_rect->width >
GST_VAAPI_SURFACE_WIDTH(src_surface)) ||
(crop_rect->y + crop_rect->height >
GST_VAAPI_SURFACE_HEIGHT(src_surface)))
goto error;
src_rect.x = crop_rect->x;
src_rect.y = crop_rect->y;
src_rect.width = crop_rect->width;
src_rect.height = crop_rect->height;
}
else {
src_rect.x = 0;
src_rect.y = 0;
src_rect.width = GST_VAAPI_SURFACE_WIDTH(src_surface);
src_rect.height = GST_VAAPI_SURFACE_HEIGHT(src_surface);
}
dst_rect.x = 0;
dst_rect.y = 0;
@ -947,3 +983,25 @@ gst_vaapi_filter_set_format(GstVaapiFilter *filter, GstVideoFormat format)
filter->format = format;
return TRUE;
}
/**
* gst_vaapi_filter_set_cropping_rectangle:
* @filter: a #GstVaapiFilter
* @rect: the cropping region
*
* Sets the source surface cropping rectangle to use during the video
* processing. If @rect is %NULL, the whole source surface will be used.
*
* Return value: %TRUE if the operation is supported, %FALSE otherwise.
*/
gboolean
gst_vaapi_filter_set_cropping_rectangle(GstVaapiFilter *filter,
const GstVaapiRectangle *rect)
{
g_return_val_if_fail(filter != NULL, FALSE);
filter->use_crop_rect = rect != NULL;
if (filter->use_crop_rect)
filter->crop_rect = *rect;
return TRUE;
}

6
gst-libs/gst/vaapi/gstvaapifilter.h
View file

@ -32,11 +32,13 @@ typedef struct _GstVaapiFilterOpInfo GstVaapiFilterOpInfo;
/**
* @GST_VAAPI_FILTER_OP_FORMAT: Force output pixel format (#GstVideoFormat).
* @GST_VAAPI_FILTER_OP_CROP: Crop source surface (#GstVaapiRectangle).
*
* The set of operations that could be applied to the filter.
*/
typedef enum {
GST_VAAPI_FILTER_OP_FORMAT = 1,
GST_VAAPI_FILTER_OP_CROP,
} GstVaapiFilterOp;
/**
@ -101,4 +103,8 @@ gst_vaapi_filter_get_formats(GstVaapiFilter *filter);
gboolean
gst_vaapi_filter_set_format(GstVaapiFilter *filter, GstVideoFormat format);
gboolean
gst_vaapi_filter_set_cropping_rectangle(GstVaapiFilter *filter,
const GstVaapiRectangle *rect);
#endif /* GST_VAAPI_FILTER_H */