1 /* Generic video mixer plugin 2 * Copyright (C) 2008 Wim Taymans <wim@fluendo.com> 3 * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk> 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public 16 * License along with this library; if not, write to the 17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 */ 20 21 #ifndef __GST_VIDEO_MIXER2_H__ 22 #define __GST_VIDEO_MIXER2_H__ 23 24 #include <gst/gst.h> 25 #include <gst/video/video.h> 26 27 #include "blend.h" 28 #include <gst/base/gstcollectpads.h> 29 30 G_BEGIN_DECLS 31 32 #define GST_TYPE_VIDEO_MIXER2 (gst_videomixer2_get_type()) 33 #define GST_VIDEO_MIXER2(obj) \ 34 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_MIXER2, GstVideoMixer2)) 35 #define GST_VIDEO_MIXER2_CLASS(klass) \ 36 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_MIXER2, GstVideoMixer2Class)) 37 #define GST_IS_VIDEO_MIXER2(obj) \ 38 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_MIXER2)) 39 #define GST_IS_VIDEO_MIXER2_CLASS(klass) \ 40 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_MIXER2)) 41 42 typedef struct _GstVideoMixer2 GstVideoMixer2; 43 typedef struct _GstVideoMixer2Class GstVideoMixer2Class; 44 45 /** 46 * GstVideoMixer2Background: 47 * @VIDEO_MIXER2_BACKGROUND_CHECKER: checker pattern background 48 * @VIDEO_MIXER2_BACKGROUND_BLACK: solid color black background 49 * @VIDEO_MIXER2_BACKGROUND_WHITE: solid color white background 50 * @VIDEO_MIXER2_BACKGROUND_TRANSPARENT: background is left transparent and layers are composited using "A OVER B" composition rules. This is only applicable to AYUV and ARGB (and variants) as it preserves the alpha channel and allows for further mixing. 51 * 52 * The different backgrounds videomixer can blend over. 53 */ 54 typedef enum 55 { 56 VIDEO_MIXER2_BACKGROUND_CHECKER, 57 VIDEO_MIXER2_BACKGROUND_BLACK, 58 VIDEO_MIXER2_BACKGROUND_WHITE, 59 VIDEO_MIXER2_BACKGROUND_TRANSPARENT, 60 } 61 GstVideoMixer2Background; 62 63 /** 64 * GstVideoMixer2: 65 * 66 * The opaque #GstVideoMixer2 structure. 67 */ 68 struct _GstVideoMixer2 69 { 70 GstElement element; 71 72 /* < private > */ 73 74 /* pad */ 75 GstPad *srcpad; 76 77 /* Lock to prevent the state to change while blending */ 78 GMutex lock; 79 80 /* Lock to prevent two src setcaps from happening at the same time */ 81 GMutex setcaps_lock; 82 83 /* Sink pads using Collect Pads 2*/ 84 GstCollectPads *collect; 85 86 /* sinkpads, a GSList of GstVideoMixer2Pads */ 87 GSList *sinkpads; 88 gint numpads; 89 /* Next available sinkpad index */ 90 guint next_sinkpad; 91 92 /* Output caps */ 93 GstVideoInfo info; 94 95 /* current caps */ 96 GstCaps *current_caps; 97 gboolean send_caps; 98 99 gboolean newseg_pending; 100 101 GstVideoMixer2Background background; 102 103 /* Current downstream segment */ 104 GstSegment segment; 105 GstClockTime ts_offset; 106 guint64 nframes; 107 108 /* QoS stuff */ 109 gdouble proportion; 110 GstClockTime earliest_time; 111 guint64 qos_processed, qos_dropped; 112 113 BlendFunction blend, overlay; 114 FillCheckerFunction fill_checker; 115 FillColorFunction fill_color; 116 117 gboolean send_stream_start; 118 119 /* latency */ 120 gboolean live; 121 122 GstTagList *pending_tags; 123 }; 124 125 struct _GstVideoMixer2Class 126 { 127 GstElementClass parent_class; 128 }; 129 130 GType gst_videomixer2_get_type (void); 131 132 G_END_DECLS 133 #endif /* __GST_VIDEO_MIXER2_H__ */ 134