gst/rtsp/: Add code to parse time ranges.

Original commit message from CVS:
* gst/rtsp/Makefile.am:
* gst/rtsp/gstrtspsrc.c: (gst_rtspsrc_handle_src_query),
(gst_rtspsrc_send_keep_alive), (gst_rtspsrc_open):
* gst/rtsp/rtsprange.c: (parse_npt_time), (parse_npt_range),
(parse_clock_range), (parse_smpte_range), (rtsp_range_parse),
(rtsp_range_free):
* gst/rtsp/rtsprange.h:
Add code to parse time ranges.
Report DURATION on the stream when possible.

ChangeLog

+2007-05-09  Wim Taymans  <wim@fluendo.com>
+
+	* gst/rtsp/Makefile.am:
+	* gst/rtsp/gstrtspsrc.c: (gst_rtspsrc_handle_src_query),
+	(gst_rtspsrc_send_keep_alive), (gst_rtspsrc_open):
+	* gst/rtsp/rtsprange.c: (parse_npt_time), (parse_npt_range),
+	(parse_clock_range), (parse_smpte_range), (rtsp_range_parse),
+	(rtsp_range_free):
+	* gst/rtsp/rtsprange.h:
+	Add code to parse time ranges.
+	Report DURATION on the stream when possible.
+
 2007-05-08  Tim-Philipp Müller  <tim at centricular dot net>
 
 	* gst/videomixer/videomixer.c: (gst_videomixer_blend_ayuv_ayuv),

gst/rtsp/Makefile.am

@@ -7,6 +7,7 @@ libgstrtsp_la_SOURCES = gstrtsp.c gstrtspsrc.c \
 			rtspextwms.c		\
 			rtspmessage.c		\
 			rtsptransport.c		\
+			rtsprange.c		\
 			rtspurl.c		\
 			sdpmessage.c            \
 			base64.c
@@ -23,4 +24,18 @@ test_SOURCES = test.c rtspdefs.c rtspurl.c rtspconnection.c rtspmessage.c rtsptr
 test_CFLAGS = $(GST_CFLAGS)
 test_LDFLAGS = $(GST_LIBS) $(WIN32_LIBS)
 
-noinst_HEADERS = gstrtspsrc.h gstrtsp.h gstrtpdec.h rtsptransport.h rtsp.h rtspurl.h rtspconnection.h rtspdefs.h rtspmessage.h sdp.h sdpmessage.h rtspextwms.h rtspext.h base64.h
+noinst_HEADERS = gstrtspsrc.h     \
+		 gstrtsp.h        \
+		 gstrtpdec.h      \
+		 rtsptransport.h  \
+		 rtsp.h           \
+		 rtspurl.h        \
+		 rtsprange.h      \
+		 rtspconnection.h \
+		 rtspdefs.h       \
+		 rtspmessage.h    \
+		 sdp.h            \
+		 sdpmessage.h     \
+		 rtspextwms.h     \
+		 rtspext.h        \
+		 base64.h

gst/rtsp/gstrtspsrc.c

@@ -94,6 +94,7 @@
 
 #include "gstrtspsrc.h"
 #include "sdp.h"
+#include "rtsprange.h"
 
 /* define for experimental real support */
 #undef WITH_EXT_REAL
@@ -1068,6 +1069,7 @@ gst_rtspsrc_handle_src_query (GstPad * pad, GstQuery * query)
 
       switch (format) {
         case GST_FORMAT_TIME:
+          gst_query_set_duration (query, format, src->segment.duration);
           break;
         default:
           res = FALSE;
@@ -3087,13 +3089,22 @@ gst_rtspsrc_open (GstRTSPSrc * src)
   if (src->extension && src->extension->parse_sdp)
     src->extension->parse_sdp (src->extension, &sdp);
 
-  /* parse range */
+  /* parse range for duration reporting. */
   {
     gchar *range;
+    RTSPTimeRange *therange;
 
     range = sdp_message_get_attribute_val (&sdp, "range");
 
-    GST_DEBUG_OBJECT (src, "got range: %s", GST_STR_NULL (range));
+    rtsp_range_parse (range, &therange);
+
+    GST_DEBUG_OBJECT (src, "range: '%s', min %f - max %f ",
+        GST_STR_NULL (range), therange->min.seconds, therange->max.seconds);
+
+    gst_segment_set_duration (&src->segment, GST_FORMAT_TIME,
+        therange->max.seconds * GST_SECOND);
+    gst_segment_set_last_stop (&src->segment, GST_FORMAT_TIME,
+        therange->min.seconds * GST_SECOND);
   }
 
   /* create streams */

gst/rtsp/rtsprange.c

+/* GStreamer
+ * Copyright (C) <2005,2006> Wim Taymans <wim@fluendo.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+/*
+ * Unless otherwise indicated, Source Code is licensed under MIT license.
+ * See further explanation attached in License Statement (distributed in the file
+ * LICENSE).
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "rtsprange.h"
+
+/* npt-time     =   "now" | npt-sec | npt-hhmmss
+ * npt-sec      =   1*DIGIT [ "." *DIGIT ]
+ * npt-hhmmss   =   npt-hh ":" npt-mm ":" npt-ss [ "." *DIGIT ]
+ * npt-hh       =   1*DIGIT     ; any positive number
+ * npt-mm       =   1*2DIGIT    ; 0-59
+ * npt-ss       =   1*2DIGIT    ; 0-59
+ */
+static RTSPResult
+parse_npt_time (const gchar * str, RTSPTime * time)
+{
+  if (strcmp (str, "now") == 0) {
+    time->type = RTSP_TIME_NOW;
+  } else if (str[0] == '\0') {
+    time->type = RTSP_TIME_END;
+  } else if (strstr (str, ":")) {
+    gfloat seconds;
+    gint hours, mins;
+
+    sscanf (str, "%2d:%2d:%f", &hours, &mins, &seconds);
+
+    time->type = RTSP_TIME_SECONDS;
+    time->seconds = ((hours * 60) + mins) * 60 + seconds;
+  } else {
+    gfloat seconds;
+
+    sscanf (str, "%f", &seconds);
+
+    time->type = RTSP_TIME_SECONDS;
+    time->seconds = seconds;
+  }
+  return RTSP_OK;
+}
+
+/* npt-range    =   ( npt-time "-" [ npt-time ] ) | ( "-" npt-time )
+ */
+static RTSPResult
+parse_npt_range (const gchar * str, RTSPTimeRange * range)
+{
+  RTSPResult res;
+  gchar *p;
+
+  range->unit = RTSP_RANGE_NPT;
+
+  /* find '-' separator */
+  p = strstr (str, "-");
+  if (p == NULL)
+    return RTSP_EINVAL;
+
+  if ((res = parse_npt_time (str, &range->min)) != RTSP_OK)
+    goto done;
+
+  res = parse_npt_time (p + 1, &range->max);
+
+done:
+  return res;
+}
+
+static RTSPResult
+parse_clock_range (const gchar * str, RTSPTimeRange * range)
+{
+  return RTSP_ENOTIMPL;
+}
+
+static RTSPResult
+parse_smpte_range (const gchar * str, RTSPTimeRange * range)
+{
+  return RTSP_ENOTIMPL;
+}
+
+/**
+ * rtsp_range_parse:
+ * @rangestr: a range string to parse
+ * @range: location to hold the #RTSPTimeRange result
+ *
+ * Parse @rangestr to a #RTSPTimeRange.
+ *
+ * Returns: #RTSP_OK on success.
+ */
+RTSPResult
+rtsp_range_parse (const gchar * rangestr, RTSPTimeRange ** range)
+{
+  RTSPResult ret;
+  RTSPTimeRange *res;
+  gchar *p;
+
+  g_return_val_if_fail (rangestr != NULL, RTSP_EINVAL);
+  g_return_val_if_fail (range != NULL, RTSP_EINVAL);
+
+  res = g_new0 (RTSPTimeRange, 1);
+
+  p = (gchar *) rangestr;
+  /* first figure out the units of the range */
+  if (g_str_has_prefix (p, "npt=")) {
+    ret = parse_npt_range (p + 4, res);
+  } else if (g_str_has_prefix (p, "clock=")) {
+    ret = parse_clock_range (p + 6, res);
+  } else if (g_str_has_prefix (p, "smpte=")) {
+    res->unit = RTSP_RANGE_SMPTE;
+    ret = parse_smpte_range (p + 6, res);
+  } else if (g_str_has_prefix (p, "smpte-30-drop=")) {
+    res->unit = RTSP_RANGE_SMPTE_30_DROP;
+    ret = parse_smpte_range (p + 14, res);
+  } else if (g_str_has_prefix (p, "smpte-25=")) {
+    res->unit = RTSP_RANGE_SMPTE_25;
+    ret = parse_smpte_range (p + 9, res);
+  } else
+    goto invalid;
+
+  if (ret == RTSP_OK)
+    *range = res;
+
+  return ret;
+
+  /* ERRORS */
+invalid:
+  {
+    rtsp_range_free (res);
+    return RTSP_EINVAL;
+  }
+}
+
+void
+rtsp_range_free (RTSPTimeRange * range)
+{
+  if (range == NULL)
+    return;
+
+  g_free (range);
+}

gst/rtsp/rtsprange.h

+/* GStreamer
+ * Copyright (C) <2005,2006> Wim Taymans <wim@fluendo.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+/*
+ * Unless otherwise indicated, Source Code is licensed under MIT license.
+ * See further explanation attached in License Statement (distributed in the file
+ * LICENSE).
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef __RTSP_RANGE_H__
+#define __RTSP_RANGE_H__
+
+#include <glib.h>
+
+#include <rtspdefs.h>
+
+G_BEGIN_DECLS
+
+/**
+ * RTSPRangeUnit:
+ * @RTSP_RANGE_SMPTE:
+ * @RTSP_RANGE_SMPTE_30_DROP:
+ * @RTSP_RANGE_SMPTE_25:
+ * @RTSP_RANGE_NPT:
+ * @RTSP_RANGE_CLOCK:
+ *
+ * Different possible time range units.
+ */
+typedef enum
+{
+  RTSP_RANGE_SMPTE,
+  RTSP_RANGE_SMPTE_30_DROP,
+  RTSP_RANGE_SMPTE_25,
+  RTSP_RANGE_NPT,
+  RTSP_RANGE_CLOCK
+} RTSPRangeUnit;
+
+typedef struct _RTSPTimeRange RTSPTimeRange;
+typedef struct _RTSPTime RTSPTime;
+
+typedef enum {
+  RTSP_TIME_SECONDS,
+  RTSP_TIME_NOW,
+  RTSP_TIME_END
+} RTSPTimeType;
+
+struct _RTSPTime {
+  RTSPTimeType type;
+  gdouble      seconds;
+};
+
+struct _RTSPTimeRange {
+  RTSPRangeUnit unit;
+
+  RTSPTime min;
+  RTSPTime max;
+};
+
+RTSPResult      rtsp_range_parse        (const gchar *rangestr, RTSPTimeRange **range);
+void            rtsp_range_free         (RTSPTimeRange *range);
+
+G_END_DECLS
+
+#endif /* __RTSP_RANGE_H__ */