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99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
#ifndef __GST_TEXT_OVERLAY_H__
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#define __GST_TEXT_OVERLAY_H__
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#include <gst/gst.h>
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#include <gst/base/gstcollectpads.h>
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#include <pango/pangoft2.h>
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G_BEGIN_DECLS
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#define GST_TYPE_TEXT_OVERLAY (gst_text_overlay_get_type())
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#define GST_TEXT_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),\
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GST_TYPE_TEXT_OVERLAY, GstTextOverlay))
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#define GST_TEXT_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),\
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GST_TYPE_TEXT_OVERLAY,GstTextOverlayClass))
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#define GST_TEXT_OVERLAY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),\
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GST_TYPE_TEXT_OVERLAY, GstTextOverlayClass))
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#define GST_IS_TEXT_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),\
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GST_TYPE_TEXT_OVERLAY))
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#define GST_IS_TEXT_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),\
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GST_TYPE_TEXT_OVERLAY))
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typedef struct _GstTextOverlay GstTextOverlay;
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typedef struct _GstTextOverlayClass GstTextOverlayClass;
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typedef enum _GstTextOverlayVAlign GstTextOverlayVAlign;
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typedef enum _GstTextOverlayHAlign GstTextOverlayHAlign;
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typedef enum _GstTextOverlayWrapMode GstTextOverlayWrapMode;
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enum _GstTextOverlayVAlign {
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GST_TEXT_OVERLAY_VALIGN_BASELINE,
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GST_TEXT_OVERLAY_VALIGN_BOTTOM,
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GST_TEXT_OVERLAY_VALIGN_TOP
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};
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enum _GstTextOverlayHAlign {
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GST_TEXT_OVERLAY_HALIGN_LEFT,
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GST_TEXT_OVERLAY_HALIGN_CENTER,
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GST_TEXT_OVERLAY_HALIGN_RIGHT
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};
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enum _GstTextOverlayWrapMode {
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GST_TEXT_OVERLAY_WRAP_MODE_NONE = -1,
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GST_TEXT_OVERLAY_WRAP_MODE_WORD = PANGO_WRAP_WORD,
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GST_TEXT_OVERLAY_WRAP_MODE_CHAR = PANGO_WRAP_CHAR,
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GST_TEXT_OVERLAY_WRAP_MODE_WORD_CHAR = PANGO_WRAP_WORD_CHAR
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};
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struct _GstTextOverlay {
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GstElement element;
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GstPad *video_sinkpad;
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GstPad *text_sinkpad;
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GstPad *srcpad;
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GstCollectPads *collect;
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GstCollectData *video_collect_data;
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GstCollectData *text_collect_data;
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gint width;
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gint height;
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gint fps_n;
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gint fps_d;
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GstTextOverlayVAlign valign;
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GstTextOverlayHAlign halign;
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GstTextOverlayWrapMode wrap_mode;
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gint xpad;
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gint ypad;
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gint deltax;
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gint deltay;
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gchar *default_text;
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gboolean want_shading;
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PangoLayout *layout;
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FT_Bitmap bitmap;
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gint bitmap_buffer_size;
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gint baseline_y;
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gboolean need_render;
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gint shading_value; /* for timeoverlay subclass */
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};
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struct _GstTextOverlayClass {
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GstElementClass parent_class;
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PangoContext *pango_context;
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gchar * (*get_text) (GstTextOverlay *overlay, GstBuffer *video_frame);
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};
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GType gst_text_overlay_get_type(void) G_GNUC_CONST;
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G_END_DECLS
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#endif /* __GST_TEXT_OVERLAY_H */
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