1 /* GStreamer 2 * 3 * Copyright (C) 2011 David Schleef <ds@schleef.org> 4 * Copyright (C) 2014 Sebastian Dröge <sebastian@centricular.com> 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 * 16 * You should have received a copy of the GNU Library General Public 17 * License along with this library; if not, write to the 18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 19 * Boston, MA 02110-1301, USA. 20 */ 21 22 #ifndef __GST_DECKLINK_AUDIO_SRC_H__ 23 #define __GST_DECKLINK_AUDIO_SRC_H__ 24 25 #include <gst/gst.h> 26 #include <gst/base/base.h> 27 #include <gst/audio/audio.h> 28 #include "gstdecklink.h" 29 30 G_BEGIN_DECLS 31 32 #define GST_TYPE_DECKLINK_AUDIO_SRC \ 33 (gst_decklink_audio_src_get_type()) 34 #define GST_DECKLINK_AUDIO_SRC(obj) \ 35 (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_DECKLINK_AUDIO_SRC, GstDecklinkAudioSrc)) 36 #define GST_DECKLINK_AUDIO_SRC_CAST(obj) \ 37 ((GstDecklinkAudioSrc*)obj) 38 #define GST_DECKLINK_AUDIO_SRC_CLASS(klass) \ 39 (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_DECKLINK_AUDIO_SRC, GstDecklinkAudioSrcClass)) 40 #define GST_IS_DECKLINK_AUDIO_SRC(obj) \ 41 (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_DECKLINK_AUDIO_SRC)) 42 #define GST_IS_DECKLINK_AUDIO_SRC_CLASS(klass) \ 43 (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_DECKLINK_AUDIO_SRC)) 44 45 typedef struct _GstDecklinkAudioSrc GstDecklinkAudioSrc; 46 typedef struct _GstDecklinkAudioSrcClass GstDecklinkAudioSrcClass; 47 48 struct _GstDecklinkAudioSrc 49 { 50 GstPushSrc parent; 51 52 GstDecklinkModeEnum mode; 53 GstDecklinkAudioConnectionEnum connection; 54 gint device_number; 55 GstDecklinkAudioChannelsEnum channels; 56 gint64 channels_found; 57 58 GstAudioInfo info; 59 60 GstDecklinkInput *input; 61 62 GCond cond; 63 GMutex lock; 64 gboolean flushing; 65 GstQueueArray *current_packets; 66 67 /* properties for handling jittery timestamps */ 68 GstClockTime alignment_threshold; 69 GstClockTime discont_wait; 70 71 /* counter to keep track of timestamps */ 72 guint64 next_offset; 73 74 /* detect gaps in stream time */ 75 GstClockTime expected_stream_time; 76 guint64 processed; 77 guint64 dropped; 78 GstClockTime last_hardware_time; 79 80 /* Last time we noticed a discont */ 81 GstClockTime discont_time; 82 83 guint buffer_size; 84 85 guint skipped_last; 86 GstClockTime skip_from_timestamp; 87 GstClockTime skip_to_timestamp; 88 }; 89 90 struct _GstDecklinkAudioSrcClass 91 { 92 GstPushSrcClass parent_class; 93 }; 94 95 GType gst_decklink_audio_src_get_type (void); 96 97 GST_ELEMENT_REGISTER_DECLARE (decklinkaudiosrc); 98 99 G_END_DECLS 100 101 #endif /* __GST_DECKLINK_AUDIO_SRC_H__ */ 102