mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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cbcf1e0b46
Add video/x-surface support in the caps We should then attach it whenever the sink supports it, but this is working for the time being
177 lines
6.1 KiB
C
177 lines
6.1 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/video/video.h>
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#include <gst/video/video-overlay-composition.h>
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#include <gst/controller/gstcontroller.h>
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#include <pango/pangocairo.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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/**
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* GstTextOverlayVAlign:
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* @GST_TEXT_OVERLAY_VALIGN_BASELINE: draw text on the baseline
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* @GST_TEXT_OVERLAY_VALIGN_BOTTOM: draw text on the bottom
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* @GST_TEXT_OVERLAY_VALIGN_TOP: draw text on top
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* @GST_TEXT_OVERLAY_VALIGN_POS: draw text according to the #GstTextOverlay:ypos property
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* @GST_TEXT_OVERLAY_VALIGN_CENTER: draw text vertically centered
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*
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* Vertical alignment of the text.
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*/
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typedef enum {
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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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GST_TEXT_OVERLAY_VALIGN_POS,
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GST_TEXT_OVERLAY_VALIGN_CENTER
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} GstTextOverlayVAlign;
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/**
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* GstTextOverlayHAlign:
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* @GST_TEXT_OVERLAY_HALIGN_LEFT: align text left
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* @GST_TEXT_OVERLAY_HALIGN_CENTER: align text center
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* @GST_TEXT_OVERLAY_HALIGN_RIGHT: align text right
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* @GST_TEXT_OVERLAY_HALIGN_POS: position text according to the #GstTextOverlay:xpos property
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*
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* Horizontal alignment of the text.
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*/
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/* FIXME 0.11: remove GST_TEXT_OVERLAY_HALIGN_UNUSED */
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typedef enum {
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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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GST_TEXT_OVERLAY_HALIGN_UNUSED,
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GST_TEXT_OVERLAY_HALIGN_POS
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} GstTextOverlayHAlign;
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/**
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* GstTextOverlayWrapMode:
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* @GST_TEXT_OVERLAY_WRAP_MODE_NONE: no wrapping
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* @GST_TEXT_OVERLAY_WRAP_MODE_WORD: do word wrapping
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* @GST_TEXT_OVERLAY_WRAP_MODE_CHAR: do char wrapping
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* @GST_TEXT_OVERLAY_WRAP_MODE_WORD_CHAR: do word and char wrapping
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*
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* Whether to wrap the text and if so how.
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*/
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typedef enum {
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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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} GstTextOverlayWrapMode;
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/**
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* GstTextOverlayLineAlign:
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* @GST_TEXT_OVERLAY_LINE_ALIGN_LEFT: lines are left-aligned
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* @GST_TEXT_OVERLAY_LINE_ALIGN_CENTER: lines are center-aligned
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* @GST_TEXT_OVERLAY_LINE_ALIGN_RIGHT: lines are right-aligned
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*
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* Alignment of text lines relative to each other
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*/
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typedef enum {
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GST_TEXT_OVERLAY_LINE_ALIGN_LEFT = PANGO_ALIGN_LEFT,
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GST_TEXT_OVERLAY_LINE_ALIGN_CENTER = PANGO_ALIGN_CENTER,
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GST_TEXT_OVERLAY_LINE_ALIGN_RIGHT = PANGO_ALIGN_RIGHT
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} GstTextOverlayLineAlign;
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/**
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* GstTextOverlay:
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*
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* Opaque textoverlay object structure
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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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GstSegment segment;
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GstSegment text_segment;
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GstBuffer *text_buffer;
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gboolean text_linked;
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gboolean video_flushing;
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gboolean video_eos;
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gboolean text_flushing;
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gboolean text_eos;
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GCond *cond; /* to signal removal of a queued text
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* buffer, arrival of a text buffer,
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* a text segment update, or a change
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* in status (e.g. shutdown, flushing) */
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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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GstVideoFormat format;
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GstTextOverlayVAlign valign;
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GstTextOverlayHAlign halign;
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GstTextOverlayWrapMode wrap_mode;
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GstTextOverlayLineAlign line_align;
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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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gdouble xpos;
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gdouble ypos;
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gchar *default_text;
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gboolean want_shading;
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gboolean silent;
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gboolean wait_text;
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guint color, outline_color;
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PangoLayout *layout;
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gdouble shadow_offset;
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gboolean want_shadow;
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gdouble outline_offset;
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GstBuffer *text_image;
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gint image_width;
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gint image_height;
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gint baseline_y;
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gboolean auto_adjust_size;
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gboolean need_render;
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gint shading_value; /* for timeoverlay subclass */
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gboolean have_pango_markup;
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gboolean use_vertical_render;
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gboolean attach_compo_to_buffer;
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GstVideoOverlayComposition *composition;
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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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GMutex *pango_lock;
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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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