695 lines
18 KiB
C
695 lines
18 KiB
C
/* GStreamer
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* Copyright (C) <2005,2006> Wim Taymans <wim@fluendo.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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/*
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* Unless otherwise indicated, Source Code is licensed under MIT license.
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* See further explanation attached in License Statement (distributed in the file
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* LICENSE).
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished to do
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* so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/**
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* SECTION:gstrtsprange
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* @title: GstRTSPTimeRange
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* @short_description: dealing with time ranges
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*
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* Provides helper functions to deal with time ranges.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <math.h>
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#include <stdio.h>
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#include <string.h>
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#include "gstrtsprange.h"
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static gdouble
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gst_strtod (const gchar * dstr)
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{
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gchar s[G_ASCII_DTOSTR_BUF_SIZE] = { 0, };
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/* canonicalise floating point string so we can handle float strings
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* in the form "24.930" or "24,930" irrespective of the current locale.
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* We should always be getting floats in 24.930 format with a floating point,
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* but let's accept malformed ones as well, easy mistake to make after all */
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g_strlcpy (s, dstr, sizeof (s));
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g_strdelimit (s, ",", '.');
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return g_ascii_strtod (s, NULL);
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}
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/* npt-time = "now" | npt-sec | npt-hhmmss
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* npt-sec = 1*DIGIT [ "." *DIGIT ]
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* npt-hhmmss = npt-hh ":" npt-mm ":" npt-ss [ "." *DIGIT ]
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* npt-hh = 1*DIGIT ; any positive number
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* npt-mm = 1*2DIGIT ; 0-59
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* npt-ss = 1*2DIGIT ; 0-59
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*/
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static GstRTSPResult
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parse_npt_time (const gchar * str, GstRTSPTime * time)
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{
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if (strncmp (str, "now", 3) == 0) {
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time->type = GST_RTSP_TIME_NOW;
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} else if (str[0] == '\0' || str[0] == '-') {
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time->type = GST_RTSP_TIME_END;
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} else if (strstr (str, ":")) {
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gint hours, mins;
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if (sscanf (str, "%2d:%2d:", &hours, &mins) != 2)
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return GST_RTSP_EINVAL;
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str = strchr (str, ':');
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str = strchr (str + 1, ':');
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if (str == NULL)
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return GST_RTSP_EINVAL;
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time->type = GST_RTSP_TIME_SECONDS;
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time->seconds = ((hours * 60) + mins) * 60 + gst_strtod (str + 1);
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} else {
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time->type = GST_RTSP_TIME_SECONDS;
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time->seconds = gst_strtod (str);
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}
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return GST_RTSP_OK;
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}
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/* npt-range = ( npt-time "-" [ npt-time ] ) | ( "-" npt-time )
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*/
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static GstRTSPResult
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parse_npt_range (const gchar * str, GstRTSPTimeRange * range)
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{
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GstRTSPResult res;
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gchar *p;
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range->unit = GST_RTSP_RANGE_NPT;
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/* find '-' separator */
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p = strstr (str, "-");
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if (p == NULL)
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return GST_RTSP_EINVAL;
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if ((res = parse_npt_time (str, &range->min)) != GST_RTSP_OK)
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goto done;
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res = parse_npt_time (p + 1, &range->max);
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/* a single - is not allowed */
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if (range->min.type == GST_RTSP_TIME_END
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&& range->max.type == GST_RTSP_TIME_END)
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return GST_RTSP_EINVAL;
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done:
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return res;
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}
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/* utc-time = utc-date "T" utc-time "Z"
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* utc-date = 8DIGIT ; < YYYYMMDD >
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* utc-time = 6DIGIT [ "." fraction ] ; < HHMMSS.fraction >
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*
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* Example for November 8, 1996 at 14h37 and 20 and a quarter seconds
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* UTC:
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*
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* 19961108T143720.25Z
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*/
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static GstRTSPResult
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parse_utc_time (const gchar * str, GstRTSPTime * time, GstRTSPTime2 * time2,
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const gchar * limit)
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{
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if (str[0] == '\0') {
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time->type = GST_RTSP_TIME_END;
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return GST_RTSP_OK;
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} else {
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gint year, month, day;
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gint hours, mins;
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gdouble secs;
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gchar *T, *Z;
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T = strchr (str, 'T');
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if (T == NULL || T != str + 8)
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return GST_RTSP_EINVAL;
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Z = strchr (T + 1, 'Z');
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if (Z == NULL)
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return GST_RTSP_EINVAL;
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time->type = GST_RTSP_TIME_UTC;
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if (sscanf (str, "%4d%2d%2dT%2d%2d%lfZ", &year, &month, &day, &hours,
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&mins, &secs) != 6)
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return GST_RTSP_EINVAL;
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time2->year = year;
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time2->month = month;
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time2->day = day;
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time->seconds = ((hours * 60) + mins) * 60 + secs;
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}
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return GST_RTSP_OK;
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}
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/* utc-range = "clock" "=" utc-time "-" [ utc-time ]
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*/
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static GstRTSPResult
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parse_utc_range (const gchar * str, GstRTSPTimeRange * range)
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{
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GstRTSPResult res;
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gchar *p;
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range->unit = GST_RTSP_RANGE_CLOCK;
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/* find '-' separator, can't have a single - */
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p = strstr (str, "-");
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if (p == NULL || p == str)
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return GST_RTSP_EINVAL;
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if ((res = parse_utc_time (str, &range->min, &range->min2, p)) != GST_RTSP_OK)
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goto done;
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res = parse_utc_time (p + 1, &range->max, &range->max2, NULL);
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done:
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return res;
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}
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/* smpte-time = 1*2DIGIT ":" 1*2DIGIT ":" 1*2DIGIT [ ":" 1*2DIGIT ]
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* [ "." 1*2DIGIT ]
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* hours:minutes:seconds:frames.subframes
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*/
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static GstRTSPResult
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parse_smpte_time (const gchar * str, GstRTSPTime * time, GstRTSPTime2 * time2,
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const gchar * limit)
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{
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gint hours, mins, secs;
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if (str[0] == '\0') {
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time->type = GST_RTSP_TIME_END;
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return GST_RTSP_OK;
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} else {
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if (sscanf (str, "%2d:%2d:%2d", &hours, &mins, &secs) != 3)
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return GST_RTSP_EINVAL;
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time->type = GST_RTSP_TIME_FRAMES;
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time->seconds = ((hours * 60) + mins) * 60 + secs;
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str = strchr (str, ':');
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str = strchr (str + 1, ':');
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str = strchr (str + 1, ':');
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if (str && (limit == NULL || str < limit))
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time2->frames = gst_strtod (str + 1);
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}
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return GST_RTSP_OK;
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}
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/* smpte-range = smpte-type "=" smpte-time "-" [ smpte-time ]
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*/
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static GstRTSPResult
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parse_smpte_range (const gchar * str, GstRTSPTimeRange * range)
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{
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GstRTSPResult res;
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gchar *p;
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/* find '-' separator, can't have a single - */
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p = strstr (str, "-");
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if (p == NULL || p == str)
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return GST_RTSP_EINVAL;
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if ((res =
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parse_smpte_time (str, &range->min, &range->min2, p)) != GST_RTSP_OK)
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goto done;
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res = parse_smpte_time (p + 1, &range->max, &range->max2, NULL);
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done:
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return res;
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}
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/**
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* gst_rtsp_range_parse:
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* @rangestr: a range string to parse
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* @range: (out): location to hold the #GstRTSPTimeRange result
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*
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* Parse @rangestr to a #GstRTSPTimeRange.
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*
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* Returns: #GST_RTSP_OK on success.
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*/
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GstRTSPResult
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gst_rtsp_range_parse (const gchar * rangestr, GstRTSPTimeRange ** range)
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{
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GstRTSPResult ret;
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GstRTSPTimeRange *res;
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gchar *p;
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g_return_val_if_fail (rangestr != NULL, GST_RTSP_EINVAL);
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g_return_val_if_fail (range != NULL, GST_RTSP_EINVAL);
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res = g_new0 (GstRTSPTimeRange, 1);
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p = (gchar *) rangestr;
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/* first figure out the units of the range */
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if (g_str_has_prefix (p, "npt=")) {
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ret = parse_npt_range (p + 4, res);
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} else if (g_str_has_prefix (p, "clock=")) {
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ret = parse_utc_range (p + 6, res);
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} else if (g_str_has_prefix (p, "smpte=")) {
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res->unit = GST_RTSP_RANGE_SMPTE;
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ret = parse_smpte_range (p + 6, res);
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} else if (g_str_has_prefix (p, "smpte-30-drop=")) {
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res->unit = GST_RTSP_RANGE_SMPTE_30_DROP;
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ret = parse_smpte_range (p + 14, res);
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} else if (g_str_has_prefix (p, "smpte-25=")) {
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res->unit = GST_RTSP_RANGE_SMPTE_25;
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ret = parse_smpte_range (p + 9, res);
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} else
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goto invalid;
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if (ret != GST_RTSP_OK)
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goto invalid;
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*range = res;
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return ret;
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/* ERRORS */
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invalid:
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{
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gst_rtsp_range_free (res);
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return GST_RTSP_EINVAL;
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}
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}
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static void
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string_append_dtostr (GString * string, gdouble value, guint precision)
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{
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gchar dstrbuf[G_ASCII_DTOSTR_BUF_SIZE] = { 0, };
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gchar *dot;
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guint len;
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precision++;
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if (value != 0.0)
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value += 4.9 * pow (10.0, precision * -1.0);
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g_ascii_dtostr (dstrbuf, G_ASCII_DTOSTR_BUF_SIZE, value);
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dot = strchr (dstrbuf, '.');
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if (dot == NULL)
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goto done;
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for (; *dot != '.' && *dot != '0'; dot++);
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if ((dot - dstrbuf) + precision < G_ASCII_DTOSTR_BUF_SIZE)
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dot[precision] = 0;
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len = strlen (dstrbuf);
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while (dstrbuf[len - 1] == '0')
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dstrbuf[--len] = 0;
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if (dstrbuf[len - 1] == '.')
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dstrbuf[--len] = 0;
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done:
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g_string_append (string, dstrbuf);
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}
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static gboolean
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time_to_string (const GstRTSPTime * t1, const GstRTSPTime2 * t2,
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GString * string)
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{
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gboolean res = TRUE;
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switch (t1->type) {
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case GST_RTSP_TIME_SECONDS:
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/* need to format floating point value strings as in C locale */
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string_append_dtostr (string, t1->seconds +
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(t1->seconds ? 0.00000000005 : 0), 9);
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break;
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case GST_RTSP_TIME_NOW:
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g_string_append (string, "now");
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break;
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case GST_RTSP_TIME_END:
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break;
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case GST_RTSP_TIME_FRAMES:
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{
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gint64 sec = t1->seconds;
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/* need to format floating point value strings as in C locale */
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g_string_append_printf (string, "%d:%02d:%02d", (gint) sec / (60 * 60),
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(gint) (sec % (60 * 60)) / 60, (gint) sec % 60);
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if (t2->frames > 0.0) {
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g_string_append_printf (string, ":%s", t2->frames < 10 ? "0" : "");
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string_append_dtostr (string, t2->frames + 0.005, 2);
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}
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break;
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}
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case GST_RTSP_TIME_UTC:
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{
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gint64 sec = t1->seconds;
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gint hours, minutes;
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gdouble seconds;
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hours = sec / (60 * 60);
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sec -= hours * 60 * 60;
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minutes = sec / 60;
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sec = ((hours * 60) + minutes) * 60;
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seconds = t1->seconds - sec;
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if (seconds)
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seconds += 0.00000000005;
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g_string_append_printf (string, "%04d%02d%02dT%02d%02d%s",
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t2->year, t2->month, t2->day, hours, minutes,
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seconds < 10 ? "0" : "");
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string_append_dtostr (string, seconds, 9);
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g_string_append (string, "Z");
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break;
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}
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default:
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res = FALSE;
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break;
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}
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return res;
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}
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static gboolean
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range_to_string (const GstRTSPTimeRange * range, GString * string)
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{
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gboolean res;
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if (!(res = time_to_string (&range->min, &range->min2, string)))
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goto done;
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g_string_append (string, "-");
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if (!(res = time_to_string (&range->max, &range->max2, string)))
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goto done;
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done:
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return res;
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}
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/**
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* gst_rtsp_range_to_string:
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* @range: a #GstRTSPTimeRange
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*
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* Convert @range into a string representation.
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*
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* Returns: The string representation of @range. g_free() after usage.
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*/
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gchar *
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gst_rtsp_range_to_string (const GstRTSPTimeRange * range)
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{
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GString *string;
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g_return_val_if_fail (range != NULL, NULL);
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switch (range->unit) {
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case GST_RTSP_RANGE_NPT:
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string = g_string_new ("npt=");
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break;
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case GST_RTSP_RANGE_SMPTE:
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case GST_RTSP_RANGE_SMPTE_30_DROP:
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string = g_string_new ("smpte=");
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break;
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case GST_RTSP_RANGE_SMPTE_25:
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string = g_string_new ("smpte-25=");
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break;
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case GST_RTSP_RANGE_CLOCK:
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string = g_string_new ("clock=");
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break;
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default:
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goto not_implemented;
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}
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if (!range_to_string (range, string))
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goto format_failed;
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return g_string_free (string, FALSE);
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/* ERRORS */
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not_implemented:
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{
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g_warning ("time range unit not yet implemented");
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return NULL;
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}
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format_failed:
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{
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g_string_free (string, TRUE);
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return NULL;
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}
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}
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/**
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* gst_rtsp_range_free:
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* @range: a #GstRTSPTimeRange
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*
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* Free the memory allocated by @range.
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*/
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void
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gst_rtsp_range_free (GstRTSPTimeRange * range)
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{
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g_return_if_fail (range != NULL);
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g_free (range);
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}
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static GstClockTime
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get_seconds (const GstRTSPTime * t)
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{
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if (t->seconds < G_MAXINT) {
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gint num, denom;
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/* Don't do direct multiply with GST_SECOND to avoid rounding
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* errors.
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* This only works for "small" numbers, because num is limited to 32-bit
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*/
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gst_util_double_to_fraction (t->seconds, &num, &denom);
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return gst_util_uint64_scale_int (GST_SECOND, num, denom);
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} else {
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return gst_util_gdouble_to_guint64 (t->seconds * GST_SECOND);
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}
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}
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static GstClockTime
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get_frames (const GstRTSPTime2 * t, GstRTSPRangeUnit unit)
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{
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gint num, denom;
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gst_util_double_to_fraction (t->frames, &num, &denom);
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switch (unit) {
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case GST_RTSP_RANGE_SMPTE_25:
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denom *= 25;
|
|
break;
|
|
case GST_RTSP_RANGE_SMPTE:
|
|
case GST_RTSP_RANGE_SMPTE_30_DROP:
|
|
default:
|
|
num *= 1001;
|
|
denom *= 30003;
|
|
break;
|
|
}
|
|
return gst_util_uint64_scale_int (GST_SECOND, num, denom);
|
|
}
|
|
|
|
static GstClockTime
|
|
get_time (GstRTSPRangeUnit unit, const GstRTSPTime * t1,
|
|
const GstRTSPTime2 * t2)
|
|
{
|
|
GstClockTime res;
|
|
|
|
switch (t1->type) {
|
|
case GST_RTSP_TIME_SECONDS:
|
|
{
|
|
res = get_seconds (t1);
|
|
break;
|
|
}
|
|
case GST_RTSP_TIME_UTC:
|
|
{
|
|
GDateTime *dt, *bt;
|
|
GTimeSpan span;
|
|
|
|
/* make time base, we use 1900 */
|
|
bt = g_date_time_new_utc (1900, 1, 1, 0, 0, 0.0);
|
|
/* convert to GDateTime without the seconds */
|
|
dt = g_date_time_new_utc (t2->year, t2->month, t2->day, 0, 0, 0.0);
|
|
/* get amount of microseconds */
|
|
span = g_date_time_difference (dt, bt);
|
|
g_date_time_unref (bt);
|
|
g_date_time_unref (dt);
|
|
/* add seconds */
|
|
res = get_seconds (t1) + (span * 1000);
|
|
break;
|
|
}
|
|
case GST_RTSP_TIME_FRAMES:
|
|
res = get_seconds (t1);
|
|
res += get_frames (t2, unit);
|
|
break;
|
|
default:
|
|
case GST_RTSP_TIME_NOW:
|
|
case GST_RTSP_TIME_END:
|
|
res = GST_CLOCK_TIME_NONE;
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* gst_rtsp_range_get_times:
|
|
* @range: a #GstRTSPTimeRange
|
|
* @min: (out): result minimum #GstClockTime
|
|
* @max: (out): result maximum #GstClockTime
|
|
*
|
|
* Retrieve the minimum and maximum values from @range converted to
|
|
* #GstClockTime in @min and @max.
|
|
*
|
|
* A value of %GST_CLOCK_TIME_NONE will be used to signal #GST_RTSP_TIME_NOW
|
|
* and #GST_RTSP_TIME_END for @min and @max respectively.
|
|
*
|
|
* UTC times will be converted to nanoseconds since 1900.
|
|
*
|
|
* Returns: %TRUE on success.
|
|
*
|
|
* Since: 1.2
|
|
*/
|
|
gboolean
|
|
gst_rtsp_range_get_times (const GstRTSPTimeRange * range,
|
|
GstClockTime * min, GstClockTime * max)
|
|
{
|
|
g_return_val_if_fail (range != NULL, FALSE);
|
|
|
|
if (min)
|
|
*min = get_time (range->unit, &range->min, &range->min2);
|
|
if (max)
|
|
*max = get_time (range->unit, &range->max, &range->max2);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
set_time (GstRTSPTime * time, GstRTSPTime2 * time2, GstRTSPRangeUnit unit,
|
|
GstClockTime clock_time)
|
|
{
|
|
memset (time, 0, sizeof (GstRTSPTime));
|
|
memset (time2, 0, sizeof (GstRTSPTime2));
|
|
|
|
if (clock_time == GST_CLOCK_TIME_NONE) {
|
|
time->type = GST_RTSP_TIME_END;
|
|
return;
|
|
}
|
|
|
|
switch (unit) {
|
|
case GST_RTSP_RANGE_SMPTE:
|
|
case GST_RTSP_RANGE_SMPTE_30_DROP:
|
|
{
|
|
time->seconds = (guint64) (clock_time / GST_SECOND);
|
|
time2->frames = 30003 * (clock_time % GST_SECOND) /
|
|
(gdouble) (1001 * GST_SECOND);
|
|
time->type = GST_RTSP_TIME_FRAMES;
|
|
g_assert (time2->frames < 30);
|
|
break;
|
|
}
|
|
case GST_RTSP_RANGE_SMPTE_25:
|
|
{
|
|
time->seconds = (guint64) (clock_time / GST_SECOND);
|
|
time2->frames = (25 * (clock_time % GST_SECOND)) / (gdouble) GST_SECOND;
|
|
time->type = GST_RTSP_TIME_FRAMES;
|
|
g_assert (time2->frames < 25);
|
|
break;
|
|
}
|
|
case GST_RTSP_RANGE_NPT:
|
|
{
|
|
time->seconds = (gdouble) clock_time / (gdouble) GST_SECOND;
|
|
time->type = GST_RTSP_TIME_SECONDS;
|
|
break;
|
|
}
|
|
case GST_RTSP_RANGE_CLOCK:
|
|
{
|
|
GDateTime *bt, *datetime;
|
|
GstClockTime subsecond = clock_time % GST_SECOND;
|
|
|
|
bt = g_date_time_new_utc (1900, 1, 1, 0, 0, 0.0);
|
|
datetime = g_date_time_add_seconds (bt, clock_time / GST_SECOND);
|
|
|
|
time2->year = g_date_time_get_year (datetime);
|
|
time2->month = g_date_time_get_month (datetime);
|
|
time2->day = g_date_time_get_day_of_month (datetime);
|
|
|
|
time->seconds = g_date_time_get_hour (datetime) * 60 * 60;
|
|
time->seconds += g_date_time_get_minute (datetime) * 60;
|
|
time->seconds += g_date_time_get_seconds (datetime);
|
|
time->seconds += (gdouble) subsecond / (gdouble) GST_SECOND;
|
|
time->type = GST_RTSP_TIME_UTC;
|
|
|
|
g_date_time_unref (bt);
|
|
g_date_time_unref (datetime);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (time->seconds < 0.000000001)
|
|
time->seconds = 0;
|
|
if (time2->frames < 0.000000001)
|
|
time2->frames = 0;
|
|
}
|
|
|
|
/**
|
|
* gst_rtsp_range_convert_units:
|
|
* @range: a #GstRTSPTimeRange
|
|
* @unit: the unit to convert the range into
|
|
*
|
|
* Converts the range in-place between different types of units.
|
|
* Ranges containing the special value #GST_RTSP_TIME_NOW can not be
|
|
* converted as these are only valid for #GST_RTSP_RANGE_NPT.
|
|
*
|
|
* Returns: %TRUE if the range could be converted
|
|
*/
|
|
|
|
gboolean
|
|
gst_rtsp_range_convert_units (GstRTSPTimeRange * range, GstRTSPRangeUnit unit)
|
|
{
|
|
if (range->unit == unit)
|
|
return TRUE;
|
|
|
|
if (range->min.type == GST_RTSP_TIME_NOW ||
|
|
range->max.type == GST_RTSP_TIME_NOW)
|
|
return FALSE;
|
|
|
|
set_time (&range->min, &range->min2, unit,
|
|
get_time (range->unit, &range->min, &range->min2));
|
|
set_time (&range->max, &range->max2, unit,
|
|
get_time (range->unit, &range->max, &range->max2));
|
|
|
|
range->unit = unit;
|
|
|
|
return TRUE;
|
|
}
|