1 /* GStreamer 2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public 15 * License along with this library; if not, write to the 16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20 #ifndef __GST_VIDEO_RATE_H__ 21 #define __GST_VIDEO_RATE_H__ 22 23 #include <gst/gst.h> 24 #include <gst/base/gstbasetransform.h> 25 26 G_BEGIN_DECLS 27 28 #define GST_TYPE_VIDEO_RATE (gst_video_rate_get_type()) 29 G_DECLARE_FINAL_TYPE (GstVideoRate, gst_video_rate, GST, VIDEO_RATE, 30 GstBaseTransform) 31 32 /** 33 * GstVideoRate: 34 * 35 * Opaque data structure. 36 */ 37 struct _GstVideoRate 38 { 39 GstBaseTransform parent; 40 41 /* video state */ 42 gint from_rate_numerator, from_rate_denominator; 43 gint to_rate_numerator, to_rate_denominator; 44 guint64 next_ts; /* Timestamp of next buffer to output */ 45 GstBuffer *prevbuf; 46 guint64 prev_ts; /* Previous buffer timestamp */ 47 guint64 out_frame_count; /* number of frames output since the beginning 48 * of the segment or the last frame rate caps 49 * change, whichever was later */ 50 guint64 base_ts; /* used in next_ts calculation after a 51 * frame rate caps change */ 52 gboolean discont; 53 guint64 last_ts; /* Timestamp of last input buffer */ 54 55 guint64 average_period; 56 GstClockTimeDiff wanted_diff; /* target average diff */ 57 GstClockTimeDiff average; /* moving average period */ 58 gboolean force_variable_rate; 59 gboolean updating_caps; 60 guint64 max_duplication_time; 61 62 /* segment handling */ 63 GstSegment segment; 64 65 /* properties */ 66 guint64 in, out, dup, drop; 67 gboolean silent; 68 gdouble new_pref; 69 gboolean skip_to_first; 70 gboolean drop_only; 71 guint64 average_period_set; 72 73 int max_rate; 74 gdouble rate; 75 gdouble pending_rate; 76 }; 77 78 GST_ELEMENT_REGISTER_DECLARE (videorate); 79 80 G_END_DECLS 81 #endif /* __GST_VIDEO_RATE_H__ */ 82