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92d10cbb8c
This prevents the ugly hack where the text_sink pad template was only added for textoverlay but not for the subclasses. Also makes this work with the core change that made subclasses inherit the templates of their parent class.
171 lines
6.1 KiB
C
171 lines
6.1 KiB
C
#ifndef __GST_BASE_TEXT_OVERLAY_H__
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#define __GST_BASE_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/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_BASE_TEXT_OVERLAY (gst_base_text_overlay_get_type())
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#define GST_BASE_TEXT_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),\
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GST_TYPE_BASE_TEXT_OVERLAY, GstBaseTextOverlay))
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#define GST_BASE_TEXT_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),\
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GST_TYPE_BASE_TEXT_OVERLAY,GstBaseTextOverlayClass))
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#define GST_BASE_TEXT_OVERLAY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),\
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GST_TYPE_BASE_TEXT_OVERLAY, GstBaseTextOverlayClass))
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#define GST_IS_BASE_TEXT_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),\
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GST_TYPE_BASE_TEXT_OVERLAY))
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#define GST_IS_BASE_TEXT_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),\
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GST_TYPE_BASE_TEXT_OVERLAY))
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typedef struct _GstBaseTextOverlay GstBaseTextOverlay;
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typedef struct _GstBaseTextOverlayClass GstBaseTextOverlayClass;
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/**
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* GstBaseTextOverlayVAlign:
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* @GST_BASE_TEXT_OVERLAY_VALIGN_BASELINE: draw text on the baseline
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* @GST_BASE_TEXT_OVERLAY_VALIGN_BOTTOM: draw text on the bottom
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* @GST_BASE_TEXT_OVERLAY_VALIGN_TOP: draw text on top
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* @GST_BASE_TEXT_OVERLAY_VALIGN_POS: draw text according to the #GstBaseTextOverlay:ypos property
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* @GST_BASE_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_BASE_TEXT_OVERLAY_VALIGN_BASELINE,
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GST_BASE_TEXT_OVERLAY_VALIGN_BOTTOM,
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GST_BASE_TEXT_OVERLAY_VALIGN_TOP,
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GST_BASE_TEXT_OVERLAY_VALIGN_POS,
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GST_BASE_TEXT_OVERLAY_VALIGN_CENTER
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} GstBaseTextOverlayVAlign;
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/**
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* GstBaseTextOverlayHAlign:
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* @GST_BASE_TEXT_OVERLAY_HALIGN_LEFT: align text left
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* @GST_BASE_TEXT_OVERLAY_HALIGN_CENTER: align text center
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* @GST_BASE_TEXT_OVERLAY_HALIGN_RIGHT: align text right
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* @GST_BASE_TEXT_OVERLAY_HALIGN_POS: position text according to the #GstBaseTextOverlay: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_BASE_TEXT_OVERLAY_HALIGN_UNUSED */
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typedef enum {
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GST_BASE_TEXT_OVERLAY_HALIGN_LEFT,
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GST_BASE_TEXT_OVERLAY_HALIGN_CENTER,
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GST_BASE_TEXT_OVERLAY_HALIGN_RIGHT,
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GST_BASE_TEXT_OVERLAY_HALIGN_UNUSED,
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GST_BASE_TEXT_OVERLAY_HALIGN_POS
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} GstBaseTextOverlayHAlign;
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/**
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* GstBaseTextOverlayWrapMode:
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* @GST_BASE_TEXT_OVERLAY_WRAP_MODE_NONE: no wrapping
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* @GST_BASE_TEXT_OVERLAY_WRAP_MODE_WORD: do word wrapping
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* @GST_BASE_TEXT_OVERLAY_WRAP_MODE_CHAR: do char wrapping
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* @GST_BASE_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_BASE_TEXT_OVERLAY_WRAP_MODE_NONE = -1,
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GST_BASE_TEXT_OVERLAY_WRAP_MODE_WORD = PANGO_WRAP_WORD,
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GST_BASE_TEXT_OVERLAY_WRAP_MODE_CHAR = PANGO_WRAP_CHAR,
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GST_BASE_TEXT_OVERLAY_WRAP_MODE_WORD_CHAR = PANGO_WRAP_WORD_CHAR
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} GstBaseTextOverlayWrapMode;
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/**
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* GstBaseTextOverlayLineAlign:
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* @GST_BASE_TEXT_OVERLAY_LINE_ALIGN_LEFT: lines are left-aligned
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* @GST_BASE_TEXT_OVERLAY_LINE_ALIGN_CENTER: lines are center-aligned
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* @GST_BASE_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_BASE_TEXT_OVERLAY_LINE_ALIGN_LEFT = PANGO_ALIGN_LEFT,
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GST_BASE_TEXT_OVERLAY_LINE_ALIGN_CENTER = PANGO_ALIGN_CENTER,
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GST_BASE_TEXT_OVERLAY_LINE_ALIGN_RIGHT = PANGO_ALIGN_RIGHT
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} GstBaseTextOverlayLineAlign;
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/**
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* GstBaseTextOverlay:
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*
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* Opaque textoverlay object structure
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*/
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struct _GstBaseTextOverlay {
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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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GstBaseTextOverlayVAlign valign;
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GstBaseTextOverlayHAlign halign;
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GstBaseTextOverlayWrapMode wrap_mode;
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GstBaseTextOverlayLineAlign 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;
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PangoLayout *layout;
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gdouble shadow_offset;
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gdouble outline_offset;
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guchar *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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};
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struct _GstBaseTextOverlayClass {
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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) (GstBaseTextOverlay *overlay, GstBuffer *video_frame);
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};
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GType gst_base_text_overlay_get_type(void) G_GNUC_CONST;
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G_END_DECLS
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#endif /* __GST_BASE_TEXT_OVERLAY_H */
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