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cairooverlay: Some minor cleanup

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This commit is contained in:
Sebastian Dröge 2011-03-02 23:14:36 +01:00
parent 6810b1bab9
commit fdbdbfefd2
2 changed files with 32 additions and 24 deletions
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33
ext/cairo/gstcairooverlay.c
View file

@ -98,9 +98,9 @@
#include <cairo.h>
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
#define ARGB_CAPS GST_VIDEO_CAPS_BGRx " ; " GST_VIDEO_CAPS_BGRA " ; "
#define TEMPLATE_CAPS GST_VIDEO_CAPS_BGRx " ; " GST_VIDEO_CAPS_BGRA " ; "
#else
#define ARGB_CAPS GST_VIDEO_CAPS_xRGB " ; " GST_VIDEO_CAPS_ARGB " ; "
#define TEMPLATE_CAPS GST_VIDEO_CAPS_xRGB " ; " GST_VIDEO_CAPS_ARGB " ; "
#endif
@ -108,14 +108,14 @@ static GstStaticPadTemplate gst_cairo_overlay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (ARGB_CAPS)
GST_STATIC_CAPS (TEMPLATE_CAPS)
);
static GstStaticPadTemplate gst_cairo_overlay_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (ARGB_CAPS)
GST_STATIC_CAPS (TEMPLATE_CAPS)
);
@ -128,6 +128,7 @@ enum
SIGNAL_CAPS_CHANGED,
N_SIGNALS
};
static guint gst_cairo_overlay_signals[N_SIGNALS];
static gboolean
@ -135,17 +136,18 @@ gst_cairo_overlay_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
GstCaps * outcaps)
{
GstCairoOverlay *overlay = GST_CAIRO_OVERLAY (btrans);
GstStructure *s = gst_caps_get_structure (incaps, 0);
gboolean ret;
if (!gst_structure_get_int (s, "bpp", &(overlay->bpp))) {
ret =
gst_video_format_parse_caps (incaps, &overlay->format, &overlay->width,
&overlay->height);
if (G_UNLIKELY (!ret))
return FALSE;
}
g_signal_emit (overlay, gst_cairo_overlay_signals[SIGNAL_CAPS_CHANGED], 0,
incaps, NULL);
return G_LIKELY (gst_video_format_parse_caps (incaps,
&overlay->caps_format, &overlay->caps_width, &overlay->caps_height));
return ret;
}
static GstFlowReturn
@ -157,11 +159,13 @@ gst_cairo_overlay_transform_ip (GstBaseTransform * btrans, GstBuffer * buf)
cairo_t *cr;
cairo_format_t format;
format = (overlay->bpp == 32) ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24;
format = (overlay->format == GST_VIDEO_FORMAT_ARGB
|| overlay->format == GST_VIDEO_FORMAT_BGRA) ?
CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24;
surface =
cairo_image_surface_create_for_data (GST_BUFFER_DATA (buf), format,
overlay->caps_width, overlay->caps_height, overlay->caps_width * 4);
overlay->width, overlay->height, overlay->width * 4);
if (G_UNLIKELY (!surface))
return GST_FLOW_ERROR;
@ -176,6 +180,7 @@ gst_cairo_overlay_transform_ip (GstBaseTransform * btrans, GstBuffer * buf)
cairo_destroy (cr);
cairo_surface_destroy (surface);
return GST_FLOW_OK;
}
@ -209,8 +214,8 @@ gst_cairo_overlay_class_init (GstCairoOverlayClass * klass)
* GstCairoOverlay::draw:
* @overlay: Overlay element emitting the signal.
* @cr: Cairo context to draw to.
* @timestamp: Timestamp (see GstClockTime) of the current buffer.
* @duration: Duration (see GstClockTime) of the current buffer.
* @timestamp: Timestamp (see #GstClockTime) of the current buffer.
* @duration: Duration (see #GstClockTime) of the current buffer.
*
* This signal is emitted when the overlay should be drawn.
*/
@ -227,7 +232,7 @@ gst_cairo_overlay_class_init (GstCairoOverlayClass * klass)
/**
* GstCairoOverlay::caps-changed:
* @overlay: Overlay element emitting the signal.
* @caps: The caps of the element.
* @caps: The #GstCaps of the element.
*
* This signal is emitted when the caps of the element has changed.
*/

23
ext/cairo/gstcairooverlay.h
View file

@ -40,18 +40,21 @@ G_BEGIN_DECLS
#define GST_IS_CAIRO_OVERLAY_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CAIRO_OVERLAY))
typedef struct _GstCairoOverlay {
GstVideoFilter parent_instance;
/* < private > */
GstVideoFormat caps_format;
int caps_width;
int caps_height;
int bpp;
} GstCairoOverlay;
typedef struct _GstCairoOverlay GstCairoOverlay;
typedef struct _GstCairoOverlayClass GstCairoOverlayClass;
typedef struct _GstCairoOverlayClass {
struct _GstCairoOverlay {
GstVideoFilter parent_instance;
/* < private > */
GstVideoFormat format;
gint width;
gint height;
};
struct _GstCairoOverlayClass {
GstVideoFilterClass parent_class;
} GstCairoOverlayClass;
};
GType gst_cairo_overlay_get_type(void);