subprojects/gst-plugins-ugly/gst/realmedia/rdtjitterbuffer.h

   1 /* GStreamer
   2  * Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
   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 __RDT_JITTER_BUFFER_H__
  21 #define __RDT_JITTER_BUFFER_H__
  22
  23 #include <gst/gst.h>
  24
  25 typedef struct _RDTJitterBuffer RDTJitterBuffer;
  26 typedef struct _RDTJitterBufferClass RDTJitterBufferClass;
  27
  28 #define RDT_TYPE_JITTER_BUFFER             (rdt_jitter_buffer_get_type())
  29 #define RDT_JITTER_BUFFER(src)             (G_TYPE_CHECK_INSTANCE_CAST((src),RDT_TYPE_JITTER_BUFFER,RDTJitterBuffer))
  30 #define RDT_JITTER_BUFFER_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST((klass),RDT_TYPE_JITTER_BUFFER,RDTJitterBufferClass))
  31 #define RDT_IS_JITTER_BUFFER(src)          (G_TYPE_CHECK_INSTANCE_TYPE((src),RDT_TYPE_JITTER_BUFFER))
  32 #define RDT_IS_JITTER_BUFFER_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE((klass),RDT_TYPE_JITTER_BUFFER))
  33 #define RDT_JITTER_BUFFER_CAST(src)        ((RDTJitterBuffer *)(src))
  34
  35 /**
  36  * RTPTailChanged:
  37  * @jbuf: an #RDTJitterBuffer
  38  * @user_data: user data specified when registering
  39  *
  40  * This callback will be called when the tail buffer of @jbuf changed.
  41  */
  42 typedef void (*RTPTailChanged) (RDTJitterBuffer *jbuf, gpointer user_data);
  43
  44 #define RDT_JITTER_BUFFER_MAX_WINDOW 512
  45 /**
  46  * RDTJitterBuffer:
  47  *
  48  * A JitterBuffer in the #RTPSession
  49  */
  50 struct _RDTJitterBuffer {
  51   GObject        object;
  52
  53   GQueue        *packets;
  54
  55   /* for calculating skew */
  56   GstClockTime   base_time;
  57   GstClockTime   base_rtptime;
  58   guint64        ext_rtptime;
  59   gint64         window[RDT_JITTER_BUFFER_MAX_WINDOW];
  60   guint          window_pos;
  61   guint          window_size;
  62   gboolean       window_filling;
  63   gint64         window_min;
  64   gint64         skew;
  65   gint64         prev_send_diff;
  66 };
  67
  68 struct _RDTJitterBufferClass {
  69   GObjectClass   parent_class;
  70 };
  71
  72 GType rdt_jitter_buffer_get_type (void);
  73
  74 /* managing lifetime */
  75 RDTJitterBuffer*      rdt_jitter_buffer_new              (void);
  76
  77 void                  rdt_jitter_buffer_reset_skew       (RDTJitterBuffer *jbuf);
  78
  79 gboolean              rdt_jitter_buffer_insert           (RDTJitterBuffer *jbuf, GstBuffer *buf,
  80                                                           GstClockTime time,
  81                                                           guint32 clock_rate,
  82                                                           gboolean *tail);
  83 GstBuffer *           rdt_jitter_buffer_peek             (RDTJitterBuffer *jbuf);
  84 GstBuffer *           rdt_jitter_buffer_pop              (RDTJitterBuffer *jbuf);
  85
  86 void                  rdt_jitter_buffer_flush            (RDTJitterBuffer *jbuf);
  87
  88 guint                 rdt_jitter_buffer_num_packets      (RDTJitterBuffer *jbuf);
  89 guint32               rdt_jitter_buffer_get_ts_diff      (RDTJitterBuffer *jbuf);
  90
  91 #endif /* __RDT_JITTER_BUFFER_H__ */