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This then just counts samples and calculates the output timestamps based on that and the very first observed timestamp. The timestamps on the buffers are continued to be used to detect discontinuities that are too big and reset the counter at that point. When receiving data via Bluetooth, many devices put completely wrong values into the RTP timestamp field. For example iOS seems to put a timestamp in milliseconds in there, instead of something based on the current sample offset (RTP clock-rate == sample rate). https://bugzilla.gnome.org/show_bug.cgi?id=787297
70 lines
2 KiB
C
70 lines
2 KiB
C
/*
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*
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* BlueZ - Bluetooth protocol stack for Linux
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*
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* Copyright (C) 2012 Collabora Ltd.
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*
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef __GST_RTP_SBC_DEPAY_H
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#define __GST_RTP_SBC_DEPAY_H
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#include <gst/gst.h>
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#include <gst/base/gstadapter.h>
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#include <gst/rtp/gstrtpbasedepayload.h>
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#include <gst/audio/audio.h>
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G_BEGIN_DECLS
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#define GST_TYPE_RTP_SBC_DEPAY \
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(gst_rtp_sbc_depay_get_type())
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#define GST_RTP_SBC_DEPAY(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_SBC_DEPAY,\
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GstRtpSbcDepay))
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#define GST_RTP_SBC_DEPAY_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_SBC_DEPAY,\
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GstRtpSbcDepayClass))
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#define GST_IS_RTP_SBC_DEPAY(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_SBC_DEPAY))
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#define GST_IS_RTP_SBC_DEPAY_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_SBC_DEPAY))
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typedef struct _GstRtpSbcDepay GstRtpSbcDepay;
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typedef struct _GstRtpSbcDepayClass GstRtpSbcDepayClass;
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struct _GstRtpSbcDepay
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{
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GstRTPBaseDepayload base;
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int rate;
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GstAdapter *adapter;
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gboolean ignore_timestamps;
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/* Timestamp tracking when ignoring input timestamps */
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GstAudioStreamAlign *stream_align;
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};
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struct _GstRtpSbcDepayClass
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{
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GstRTPBaseDepayloadClass parent_class;
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};
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GType gst_rtp_sbc_depay_get_type (void);
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gboolean gst_rtp_sbc_depay_plugin_init (GstPlugin * plugin);
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G_END_DECLS
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#endif
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