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5a473e3e07
Original commit message from CVS: * ext/pango/gsttextoverlay.c: (gst_text_overlay_class_init), (gst_text_overlay_init), (gst_text_overlay_set_property), (gst_text_overlay_get_property), (gst_text_overlay_src_event), (gst_text_overlay_text_event), (gst_text_overlay_video_event), (gst_text_overlay_text_chain), (gst_text_overlay_video_chain), (gst_text_overlay_change_state): * ext/pango/gsttextoverlay.h: Add property to configure waiting for text on the textpad or not, with the default behaviour being the old one (always wait for text before rendering the video). This default behaviour is usually not the best one because the text stream can very sparse and could require queueing a lot of video. Fix the flushing and EOS handing so that we don't mix up their meaning.
151 lines
4.9 KiB
C
151 lines
4.9 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 <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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/**
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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 test on top
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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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} 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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*
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* Horizontal alignment of the text.
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*/
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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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} 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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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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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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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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gboolean have_pango_markup;
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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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