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rtspsrc: serialise/deserialise floats without changing locale

Browse source 
Use g_ascii_dtostr() and g_ascii_strtod() to serialise/deserialise
floating point numbers, instead of ugly hacks that switch locale
before and after calling libc functions (which is not a good idea
in a multi-threaded application).
This commit is contained in:
Tim-Philipp Müller 2010-12-29 15:54:46 +00:00
parent fafd0b7bc3
commit 96830324a5
1 changed files with 22 additions and 42 deletions
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64
gst/rtsp/gstrtspsrc.c
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@ -260,7 +260,6 @@ static gboolean gst_rtspsrc_stream_push_event (GstRTSPSrc * src,
GstRTSPStream * stream, GstEvent * event, gboolean source);
static gboolean gst_rtspsrc_push_event (GstRTSPSrc * src, GstEvent * event,
gboolean source);
static gchar *gst_rtspsrc_dup_printf (const gchar * format, ...);
/* commands we send to out loop to notify it of events */
#define CMD_WAIT 0
@ -4968,7 +4967,7 @@ gst_rtspsrc_setup_streams (GstRTSPSrc * src)
/* if the user wants a non default RTP packet size we add the blocksize
* parameter */
if (src->rtp_blocksize > 0) {
hval = gst_rtspsrc_dup_printf ("%d", src->rtp_blocksize);
hval = g_strdup_printf ("%d", src->rtp_blocksize);
gst_rtsp_message_add_header (&request, GST_RTSP_HDR_BLOCKSIZE, hval);
g_free (hval);
}
@ -5744,51 +5743,34 @@ gst_rtspsrc_parse_rtpinfo (GstRTSPSrc * src, gchar * rtpinfo)
return TRUE;
}
#define USE_POSIX_LOCALE { \
gchar *__old_locale = g_strdup (setlocale (LC_NUMERIC, NULL)); \
setlocale (LC_NUMERIC, "POSIX");
#define RESTORE_LOCALE \
setlocale (LC_NUMERIC, __old_locale); \
g_free (__old_locale);}
static gchar *
gst_rtspsrc_dup_printf (const gchar * format, ...)
static gdouble
gst_rtspsrc_get_float (const gchar * dstr)
{
gchar *result;
va_list varargs;
gchar s[G_ASCII_DTOSTR_BUF_SIZE] = { 0, };
USE_POSIX_LOCALE va_start (varargs, format);
result = g_strdup_vprintf (format, varargs);
va_end (varargs);
RESTORE_LOCALE return result;
}
static gint
gst_rtspsrc_get_float (const char *str, gfloat * val)
{
gint result;
USE_POSIX_LOCALE result = sscanf (str, "%f", val);
RESTORE_LOCALE return result;
/* canonicalise floating point string so we can handle float strings
* in the form "24.930" or "24,930" irrespective of the current locale */
g_strlcpy (s, dstr, sizeof (s));
g_strdelimit (s, ",", '.');
return g_ascii_strtod (s, NULL);
}
static gchar *
gen_range_header (GstRTSPSrc * src, GstSegment * segment)
{
gchar *res;
gchar val_str[G_ASCII_DTOSTR_BUF_SIZE] = { 0, };
if (src->range && src->range->min.type == GST_RTSP_TIME_NOW) {
res = g_strdup_printf ("npt=now-");
g_strlcpy (val_str, "now", sizeof (val_str));
} else {
if (segment->last_stop == 0)
res = g_strdup_printf ("npt=0-");
else
res = gst_rtspsrc_dup_printf ("npt=%f-",
if (segment->last_stop == 0) {
g_strlcpy (val_str, "0", sizeof (val_str));
} else {
g_ascii_dtostr (val_str, sizeof (val_str),
((gdouble) segment->last_stop) / GST_SECOND);
}
}
return res;
return g_strdup_printf ("npt=%s-", val_str);
}
static void
@ -5813,7 +5795,6 @@ gst_rtspsrc_play (GstRTSPSrc * src, GstSegment * segment)
GstRTSPResult res;
GList *walk;
gchar *hval;
gfloat fval;
gint hval_idx;
gchar *control;
@ -5878,12 +5859,13 @@ gst_rtspsrc_play (GstRTSPSrc * src, GstSegment * segment)
}
if (segment->rate != 1.0) {
hval = gst_rtspsrc_dup_printf ("%f", segment->rate);
gchar hval[G_ASCII_DTOSTR_BUF_SIZE];
g_ascii_dtostr (hval, sizeof (hval), segment->rate);
if (src->skip)
gst_rtsp_message_add_header (&request, GST_RTSP_HDR_SCALE, hval);
else
gst_rtsp_message_add_header (&request, GST_RTSP_HDR_SPEED, hval);
g_free (hval);
}
if (gst_rtspsrc_send (src, conn, &request, &response, NULL) < 0)
@ -5926,12 +5908,10 @@ gst_rtspsrc_play (GstRTSPSrc * src, GstSegment * segment)
* and should be put in the NEWSEGMENT rate field. */
if (gst_rtsp_message_get_header (&response, GST_RTSP_HDR_SPEED, &hval,
0) == GST_RTSP_OK) {
if (gst_rtspsrc_get_float (hval, &fval) > 0)
segment->rate = fval;
segment->rate = gst_rtspsrc_get_float (hval);
} else if (gst_rtsp_message_get_header (&response, GST_RTSP_HDR_SCALE,
&hval, 0) == GST_RTSP_OK) {
if (gst_rtspsrc_get_float (hval, &fval) > 0)
segment->rate = fval;
segment->rate = gst_rtspsrc_get_float (hval);
}
/* parse the RTP-Info header field (if ANY) to get the base seqnum and timestamp