2 * Copyright (C) <2005,2006> Wim Taymans <wim@fluendo.com>
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44 * SECTION:gstrtsprange
45 * @short_description: dealing with time ranges
49 * Provides helper functions to deal with time ranges.
53 * Last reviewed on 2007-07-25 (0.10.14)
60 #include "gstrtsprange.h"
62 /* npt-time = "now" | npt-sec | npt-hhmmss
63 * npt-sec = 1*DIGIT [ "." *DIGIT ]
64 * npt-hhmmss = npt-hh ":" npt-mm ":" npt-ss [ "." *DIGIT ]
65 * npt-hh = 1*DIGIT ; any positive number
66 * npt-mm = 1*2DIGIT ; 0-59
67 * npt-ss = 1*2DIGIT ; 0-59
70 parse_npt_time (const gchar * str, GstRTSPTime * time)
72 if (strncmp (str, "now", 3) == 0) {
73 time->type = GST_RTSP_TIME_NOW;
74 } else if (str[0] == '\0') {
75 time->type = GST_RTSP_TIME_END;
76 } else if (strstr (str, ":")) {
80 sscanf (str, "%2d:%2d:%f", &hours, &mins, &seconds);
82 time->type = GST_RTSP_TIME_SECONDS;
83 time->seconds = ((hours * 60) + mins) * 60 + seconds;
87 sscanf (str, "%f", &seconds);
89 time->type = GST_RTSP_TIME_SECONDS;
90 time->seconds = seconds;
95 /* npt-range = ( npt-time "-" [ npt-time ] ) | ( "-" npt-time )
98 parse_npt_range (const gchar * str, GstRTSPTimeRange * range)
103 range->unit = GST_RTSP_RANGE_NPT;
105 /* find '-' separator */
106 p = strstr (str, "-");
108 return GST_RTSP_EINVAL;
110 if ((res = parse_npt_time (str, &range->min)) != GST_RTSP_OK)
113 res = parse_npt_time (p + 1, &range->max);
120 parse_clock_range (const gchar * str, GstRTSPTimeRange * range)
122 return GST_RTSP_ENOTIMPL;
126 parse_smpte_range (const gchar * str, GstRTSPTimeRange * range)
128 return GST_RTSP_ENOTIMPL;
132 * gst_rtsp_range_parse:
133 * @rangestr: a range string to parse
134 * @range: location to hold the #GstRTSPTimeRange result
136 * Parse @rangestr to a #GstRTSPTimeRange.
138 * Returns: #GST_RTSP_OK on success.
141 gst_rtsp_range_parse (const gchar * rangestr, GstRTSPTimeRange ** range)
144 GstRTSPTimeRange *res;
147 g_return_val_if_fail (rangestr != NULL, GST_RTSP_EINVAL);
148 g_return_val_if_fail (range != NULL, GST_RTSP_EINVAL);
150 res = g_new0 (GstRTSPTimeRange, 1);
152 p = (gchar *) rangestr;
153 /* first figure out the units of the range */
154 if (g_str_has_prefix (p, "npt=")) {
155 ret = parse_npt_range (p + 4, res);
156 } else if (g_str_has_prefix (p, "clock=")) {
157 ret = parse_clock_range (p + 6, res);
158 } else if (g_str_has_prefix (p, "smpte=")) {
159 res->unit = GST_RTSP_RANGE_SMPTE;
160 ret = parse_smpte_range (p + 6, res);
161 } else if (g_str_has_prefix (p, "smpte-30-drop=")) {
162 res->unit = GST_RTSP_RANGE_SMPTE_30_DROP;
163 ret = parse_smpte_range (p + 14, res);
164 } else if (g_str_has_prefix (p, "smpte-25=")) {
165 res->unit = GST_RTSP_RANGE_SMPTE_25;
166 ret = parse_smpte_range (p + 9, res);
170 if (ret != GST_RTSP_OK)
179 gst_rtsp_range_free (res);
180 return GST_RTSP_EINVAL;
185 npt_time_string (const GstRTSPTime * time, GString * string)
187 gboolean res = TRUE;;
189 switch (time->type) {
190 case GST_RTSP_TIME_SECONDS:
191 g_string_append_printf (string, "%f", time->seconds);
193 case GST_RTSP_TIME_NOW:
194 g_string_append (string, "now");
196 case GST_RTSP_TIME_END:
206 npt_range_string (const GstRTSPTimeRange * range, GString * string)
210 if (!(res = npt_time_string (&range->min, string)))
213 g_string_append (string, "-");
215 if (!(res = npt_time_string (&range->max, string)))
223 * gst_rtsp_range_to_string:
224 * @range: a #GstRTSPTimeRange
226 * Convert @range into a string representation.
228 * Returns: The string representation of @range. g_free() after usage.
233 gst_rtsp_range_to_string (const GstRTSPTimeRange * range)
235 gchar *result = NULL;
238 g_return_val_if_fail (range != NULL, NULL);
240 string = g_string_new ("");
242 switch (range->unit) {
243 case GST_RTSP_RANGE_NPT:
244 g_string_append (string, "npt=");
245 if (!npt_range_string (range, string)) {
246 g_string_free (string, TRUE);
250 case GST_RTSP_RANGE_SMPTE:
251 case GST_RTSP_RANGE_SMPTE_30_DROP:
252 case GST_RTSP_RANGE_SMPTE_25:
253 case GST_RTSP_RANGE_CLOCK:
255 g_warning ("time range unit not yet implemented");
256 g_string_free (string, TRUE);
261 result = g_string_free (string, FALSE);
267 * gst_rtsp_range_free:
268 * @range: a #GstRTSPTimeRange
270 * Free the memory alocated by @range.
273 gst_rtsp_range_free (GstRTSPTimeRange * range)