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 #define GST_TYPE_VIDEO_RATE \ 28 (gst_video_rate_get_type()) 29 #define GST_VIDEO_RATE(obj) \ 30 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_RATE,GstVideoRate)) 31 #define GST_VIDEO_RATE_CLASS(klass) \ 32 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_RATE,GstVideoRateClass)) 33 #define GST_IS_VIDEO_RATE(obj) \ 34 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_RATE)) 35 #define GST_IS_VIDEO_RATE_CLASS(klass) \ 36 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_RATE)) 37 typedef struct _GstVideoRate GstVideoRate; 38 typedef struct _GstVideoRateClass GstVideoRateClass; 39 40 /** 41 * GstVideoRate: 42 * 43 * Opaque data structure. 44 */ 45 struct _GstVideoRate 46 { 47 GstBaseTransform parent; 48 49 /* video state */ 50 gint from_rate_numerator, from_rate_denominator; 51 gint to_rate_numerator, to_rate_denominator; 52 guint64 next_ts; /* Timestamp of next buffer to output */ 53 GstBuffer *prevbuf; 54 guint64 prev_ts; /* Previous buffer timestamp */ 55 guint64 out_frame_count; /* number of frames output since the beginning 56 * of the segment or the last frame rate caps 57 * change, whichever was later */ 58 guint64 base_ts; /* used in next_ts calculation after a 59 * frame rate caps change */ 60 gboolean discont; 61 guint64 last_ts; /* Timestamp of last input buffer */ 62 63 guint64 average_period; 64 GstClockTimeDiff wanted_diff; /* target average diff */ 65 GstClockTimeDiff average; /* moving average period */ 66 gboolean force_variable_rate; 67 gboolean updating_caps; 68 guint64 max_duplication_time; 69 70 /* segment handling */ 71 GstSegment segment; 72 73 /* properties */ 74 guint64 in, out, dup, drop; 75 gboolean silent; 76 gdouble new_pref; 77 gboolean skip_to_first; 78 gboolean drop_only; 79 guint64 average_period_set; 80 81 volatile int max_rate; 82 gdouble rate; 83 }; 84 85 struct _GstVideoRateClass 86 { 87 GstBaseTransformClass parent_class; 88 }; 89 90 GType gst_video_rate_get_type (void); 91 92 G_END_DECLS 93 #endif /* __GST_VIDEO_RATE_H__ */ 94