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134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
/* GStreamer
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* Copyright (C) <2012> Wim Taymans <wim.taymans@gmail.com>
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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 Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:gstrtphdrext
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* @title: GstRtphdrext
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* @short_description: Helper methods for dealing with RTP header extensions
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* @see_also: #GstRTPBasePayload, #GstRTPBaseDepayload, gstrtpbuffer
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*
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*/
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#include "gstrtphdrext.h"
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#include <stdlib.h>
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#include <string.h>
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/**
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* gst_rtp_hdrext_set_ntp_64:
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* @data: the data to write to
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* @size: the size of @data
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* @ntptime: the NTP time
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*
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* Writes the NTP time in @ntptime to the format required for the NTP-64 header
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* extension. @data must hold at least #GST_RTP_HDREXT_NTP_64_SIZE bytes.
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*
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* Returns: %TRUE on success.
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*/
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gboolean
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gst_rtp_hdrext_set_ntp_64 (gpointer data, guint size, guint64 ntptime)
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{
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g_return_val_if_fail (data != NULL, FALSE);
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g_return_val_if_fail (size >= GST_RTP_HDREXT_NTP_64_SIZE, FALSE);
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GST_WRITE_UINT64_BE (data, ntptime);
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return TRUE;
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}
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/**
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* gst_rtp_hdrext_get_ntp_64:
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* @data: (array length=size) (element-type guint8): the data to read from
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* @size: the size of @data
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* @ntptime: (out): the result NTP time
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*
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* Reads the NTP time from the @size NTP-64 extension bytes in @data and store the
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* result in @ntptime.
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*
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* Returns: %TRUE on success.
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*/
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gboolean
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gst_rtp_hdrext_get_ntp_64 (gpointer data, guint size, guint64 * ntptime)
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{
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g_return_val_if_fail (data != NULL, FALSE);
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g_return_val_if_fail (size >= GST_RTP_HDREXT_NTP_64_SIZE, FALSE);
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if (ntptime)
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*ntptime = GST_READ_UINT64_BE (data);
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return TRUE;
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}
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/**
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* gst_rtp_hdrext_set_ntp_56:
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* @data: the data to write to
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* @size: the size of @data
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* @ntptime: the NTP time
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*
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* Writes the NTP time in @ntptime to the format required for the NTP-56 header
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* extension. @data must hold at least #GST_RTP_HDREXT_NTP_56_SIZE bytes.
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*
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* Returns: %TRUE on success.
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*/
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gboolean
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gst_rtp_hdrext_set_ntp_56 (gpointer data, guint size, guint64 ntptime)
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{
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guint8 *d = data;
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gint i;
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g_return_val_if_fail (data != NULL, FALSE);
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g_return_val_if_fail (size >= GST_RTP_HDREXT_NTP_56_SIZE, FALSE);
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for (i = 0; i < 7; i++) {
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d[6 - i] = ntptime & 0xff;
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ntptime >>= 8;
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}
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return TRUE;
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}
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/**
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* gst_rtp_hdrext_get_ntp_56:
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* @data: (array length=size) (element-type guint8): the data to read from
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* @size: the size of @data
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* @ntptime: (out): the result NTP time
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*
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* Reads the NTP time from the @size NTP-56 extension bytes in @data and store the
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* result in @ntptime.
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*
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* Returns: %TRUE on success.
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*/
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gboolean
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gst_rtp_hdrext_get_ntp_56 (gpointer data, guint size, guint64 * ntptime)
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{
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guint8 *d = data;
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g_return_val_if_fail (data != NULL, FALSE);
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g_return_val_if_fail (size >= GST_RTP_HDREXT_NTP_56_SIZE, FALSE);
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if (ntptime) {
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gint i;
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*ntptime = 0;
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for (i = 0; i < 7; i++) {
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*ntptime <<= 8;
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*ntptime |= d[i];
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}
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}
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return TRUE;
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}
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