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3d09a3b18a
Push incoming subtitle pages in a FIFO queue (pending_subtitles) and dequeue the head when it's time to show it (when video running time reaches the subtitle page running time). Keep the subtitle page, that is supposed to be blended on top of video currently, in a separate object variable (current_subtitle). As a next step we can then pre-render current_subtitle to a better to blend format.
87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/* GStreamer DVB subtitles overlay
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* Copyright (c) 2010 Mart Raudsepp <mart.raudsepp@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_DVBSUB_OVERLAY_H__
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#define __GST_DVBSUB_OVERLAY_H__
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include "dvb-sub.h"
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G_BEGIN_DECLS
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#define GST_TYPE_DVBSUB_OVERLAY (gst_dvbsub_overlay_get_type())
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#define GST_DVBSUB_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DVBSUB_OVERLAY,GstDVBSubOverlay))
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#define GST_DVBSUB_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DVBSUB_OVERLAY,GstDVBSubOverlayClass))
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#define GST_IS_DVBSUB_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DVBSUB_OVERLAY))
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#define GST_IS_DVBSUB_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DVBSUB_OVERLAY))
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typedef struct _GstDVBSubOverlay GstDVBSubOverlay;
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typedef struct _GstDVBSubOverlayClass GstDVBSubOverlayClass;
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typedef void (*GstAssRenderBlitFunction) (GstDVBSubOverlay *overlay, DVBSubtitles *subs, GstBuffer *buffer);
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struct _GstDVBSubOverlay
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{
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GstElement element;
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GstPad *video_sinkpad, *text_sinkpad, *srcpad;
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/* properties */
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gboolean enable;
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/* <private> */
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GstSegment video_segment;
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GstSegment subtitle_segment;
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GstVideoFormat format;
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gint width, height;
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gint fps_n, fps_d;
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GstAssRenderBlitFunction blit;
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DVBSubtitles *current_subtitle; /* The currently active set of subtitle regions, if any */
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GQueue *pending_subtitles; /* A queue of raw subtitle region sets with
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* metadata that are waiting their running time */
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GMutex *subtitle_mutex;
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GCond *subtitle_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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* FIXME: Update comment for dvbsub case */
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GstBuffer *subtitle_pending;
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gboolean subtitle_flushing;
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gboolean subtitle_eos;
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GMutex *dvbsub_mutex; /* FIXME: Do we need a mutex lock in case of libdvbsub? Probably, but... */
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DvbSub *dvb_sub;
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gboolean renderer_init_ok;
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};
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struct _GstDVBSubOverlayClass
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{
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GstElementClass parent_class;
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};
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GType gst_dvbsub_overlay_get_type (void);
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G_END_DECLS
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#endif
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