author | Pat Downey <patd@symbian.org> |
Wed, 01 Sep 2010 12:16:41 +0100 | |
branch | RCL_3 |
changeset 30 | 7e817e7e631c |
parent 2 | 5505e8908944 |
permissions | -rw-r--r-- |
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#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 text_flushing; |
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gboolean text_eos; |
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101 |
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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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106 |
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107 |
gint width; |
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108 |
gint height; |
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gint fps_n; |
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gint fps_d; |
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111 |
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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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116 |
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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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124 |
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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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129 |
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gboolean need_render; |
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131 |
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gint shading_value; /* for timeoverlay subclass */ |
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133 |
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gboolean have_pango_markup; |
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135 |
}; |
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136 |
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struct _GstTextOverlayClass { |
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GstElementClass parent_class; |
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139 |
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PangoContext *pango_context; |
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141 |
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gchar * (*get_text) (GstTextOverlay *overlay, GstBuffer *video_frame); |
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}; |
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144 |
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GType gst_text_overlay_get_type(void) G_GNUC_CONST; |
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146 |
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G_END_DECLS |
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#endif /* __GST_TEXT_OVERLAY_H */ |