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gstreamer/gst-libs/gst/sdp/gstsdpmessage.c
Justin Kim 91179622eb sdpmessage: add_attribute accepts NULL value 
The attribute can be defined without value regardless session-level
or media-level.
Although `gst_sdp_message_insert_attribute` can be used to set NULL,
it would be easier if `gst_sdp_message_add_attribute` accepts NULL.

https://bugzilla.gnome.org/show_bug.cgi?id=789841
2017-11-03 17:56:39 +11:00

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/* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, 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.
*/
/**
* SECTION:gstsdpmessage
* @title: GstSDPMessage
* @short_description: Helper methods for dealing with SDP messages
*
* The GstSDPMessage helper functions makes it easy to parse and create SDP
* messages.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gio/gio.h>
#include <gst/rtp/gstrtppayloads.h>
#include "gstsdpmessage.h"
#define FREE_STRING(field) g_free (field); (field) = NULL
#define REPLACE_STRING(field, val) FREE_STRING(field); (field) = g_strdup (val)
static void
free_string (gchar ** str)
{
FREE_STRING (*str);
}
#define INIT_ARRAY(field, type, init_func) \
G_STMT_START { \
if (field) { \
guint i; \
for(i = 0; i < (field)->len; i++) \
init_func (&g_array_index ((field), type, i)); \
g_array_set_size ((field), 0); \
} \
else \
(field) = g_array_new (FALSE, TRUE, sizeof (type)); \
} G_STMT_END
#define FREE_ARRAY(field) \
G_STMT_START { \
if (field) \
g_array_free ((field), TRUE); \
(field) = NULL; \
} G_STMT_END
#define DEFINE_STRING_SETTER(field) \
GstSDPResult gst_sdp_message_set_##field (GstSDPMessage *msg, const gchar *val) { \
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL); \
g_free (msg->field); \
msg->field = g_strdup (val); \
return GST_SDP_OK; \
}
#define DEFINE_STRING_GETTER(field) \
const gchar* gst_sdp_message_get_##field (const GstSDPMessage *msg) { \
g_return_val_if_fail (msg != NULL, NULL); \
return msg->field; \
}
#define DEFINE_ARRAY_LEN(field) \
guint gst_sdp_message_##field##_len (const GstSDPMessage *msg) { \
g_return_val_if_fail (msg != NULL, 0); \
return msg->field->len; \
}
#define DEFINE_ARRAY_GETTER(method, field, type) \
const type * gst_sdp_message_get_##method (const GstSDPMessage *msg, guint idx) { \
g_return_val_if_fail (msg != NULL, NULL); \
return &g_array_index (msg->field, type, idx); \
}
#define DEFINE_PTR_ARRAY_GETTER(method, field, type) \
const type gst_sdp_message_get_##method (const GstSDPMessage *msg, guint idx) { \
g_return_val_if_fail (msg != NULL, (type) 0); \
return g_array_index (msg->field, type, idx); \
}
#define DEFINE_ARRAY_INSERT(method, field, intype, dup_method, type) \
GstSDPResult gst_sdp_message_insert_##method (GstSDPMessage *msg, gint idx, intype val) { \
type vt; \
type* v = &vt; \
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL); \
dup_method (v, val); \
if (idx == -1) \
g_array_append_val (msg->field, vt); \
else \
g_array_insert_val (msg->field, idx, vt); \
return GST_SDP_OK; \
}
#define DEFINE_ARRAY_REPLACE(method, field, intype, free_method, dup_method, type) \
GstSDPResult gst_sdp_message_replace_##method (GstSDPMessage *msg, guint idx, intype val) { \
type *v; \
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL); \
v = &g_array_index (msg->field, type, idx); \
free_method (v); \
dup_method (v, val); \
return GST_SDP_OK; \
}
#define DEFINE_ARRAY_REMOVE(method, field, type, free_method) \
GstSDPResult gst_sdp_message_remove_##method (GstSDPMessage *msg, guint idx) { \
type *v; \
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL); \
v = &g_array_index (msg->field, type, idx); \
free_method (v); \
g_array_remove_index (msg->field, idx); \
return GST_SDP_OK; \
}
#define DEFINE_ARRAY_ADDER(method, type) \
GstSDPResult gst_sdp_message_add_##method (GstSDPMessage *msg, const type val) { \
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL); \
return gst_sdp_message_insert_##method (msg, -1, val); \
}
#define dup_string(v,val) ((*v) = g_strdup (val))
#define INIT_STR_ARRAY(field) \
INIT_ARRAY (field, gchar *, free_string)
#define DEFINE_STR_ARRAY_GETTER(method, field) \
DEFINE_PTR_ARRAY_GETTER(method, field, gchar *)
#define DEFINE_STR_ARRAY_INSERT(method, field) \
DEFINE_ARRAY_INSERT (method, field, const gchar *, dup_string, gchar *)
#define DEFINE_STR_ARRAY_ADDER(method, field) \
DEFINE_ARRAY_ADDER (method, gchar *)
#define DEFINE_STR_ARRAY_REPLACE(method, field) \
DEFINE_ARRAY_REPLACE (method, field, const gchar *, free_string, dup_string, gchar *)
#define DEFINE_STR_ARRAY_REMOVE(method, field) \
DEFINE_ARRAY_REMOVE (method, field, gchar *, free_string)
static GstSDPMessage *gst_sdp_message_boxed_copy (GstSDPMessage * orig);
static void gst_sdp_message_boxed_free (GstSDPMessage * msg);
G_DEFINE_BOXED_TYPE (GstSDPMessage, gst_sdp_message, gst_sdp_message_boxed_copy,
gst_sdp_message_boxed_free);
static GstSDPMessage *
gst_sdp_message_boxed_copy (GstSDPMessage * orig)
{
GstSDPMessage *copy;
if (!orig)
return NULL;
if (gst_sdp_message_copy (orig, &copy) == GST_SDP_OK)
return copy;
return NULL;
}
static void
gst_sdp_message_boxed_free (GstSDPMessage * msg)
{
gst_sdp_message_free (msg);
}
static void
gst_sdp_origin_init (GstSDPOrigin * origin)
{
FREE_STRING (origin->username);
FREE_STRING (origin->sess_id);
FREE_STRING (origin->sess_version);
FREE_STRING (origin->nettype);
FREE_STRING (origin->addrtype);
FREE_STRING (origin->addr);
}
static void
gst_sdp_key_init (GstSDPKey * key)
{
FREE_STRING (key->type);
FREE_STRING (key->data);
}
/**
* gst_sdp_message_new:
* @msg: (out) (transfer full): pointer to new #GstSDPMessage
*
* Allocate a new GstSDPMessage and store the result in @msg.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_message_new (GstSDPMessage ** msg)
{
GstSDPMessage *newmsg;
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
newmsg = g_new0 (GstSDPMessage, 1);
*msg = newmsg;
return gst_sdp_message_init (newmsg);
}
/**
* gst_sdp_message_init:
* @msg: a #GstSDPMessage
*
* Initialize @msg so that its contents are as if it was freshly allocated
* with gst_sdp_message_new(). This function is mostly used to initialize a message
* allocated on the stack. gst_sdp_message_uninit() undoes this operation.
*
* When this function is invoked on newly allocated data (with malloc or on the
* stack), its contents should be set to 0 before calling this function.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_message_init (GstSDPMessage * msg)
{
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
FREE_STRING (msg->version);
gst_sdp_origin_init (&msg->origin);
FREE_STRING (msg->session_name);
FREE_STRING (msg->information);
FREE_STRING (msg->uri);
INIT_STR_ARRAY (msg->emails);
INIT_STR_ARRAY (msg->phones);
gst_sdp_connection_clear (&msg->connection);
INIT_ARRAY (msg->bandwidths, GstSDPBandwidth, gst_sdp_bandwidth_clear);
INIT_ARRAY (msg->times, GstSDPTime, gst_sdp_time_clear);
INIT_ARRAY (msg->zones, GstSDPZone, gst_sdp_zone_clear);
gst_sdp_key_init (&msg->key);
INIT_ARRAY (msg->attributes, GstSDPAttribute, gst_sdp_attribute_clear);
INIT_ARRAY (msg->medias, GstSDPMedia, gst_sdp_media_uninit);
return GST_SDP_OK;
}
/**
* gst_sdp_message_uninit:
* @msg: a #GstSDPMessage
*
* Free all resources allocated in @msg. @msg should not be used anymore after
* this function. This function should be used when @msg was allocated on the
* stack and initialized with gst_sdp_message_init().
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_message_uninit (GstSDPMessage * msg)
{
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
gst_sdp_message_init (msg);
FREE_ARRAY (msg->emails);
FREE_ARRAY (msg->phones);
FREE_ARRAY (msg->bandwidths);
FREE_ARRAY (msg->times);
FREE_ARRAY (msg->zones);
FREE_ARRAY (msg->attributes);
FREE_ARRAY (msg->medias);
return GST_SDP_OK;
}
/**
* gst_sdp_message_copy:
* @msg: a #GstSDPMessage
* @copy: (out) (transfer full): pointer to new #GstSDPMessage
*
* Allocate a new copy of @msg and store the result in @copy. The value in
* @copy should be release with gst_sdp_message_free function.
*
* Returns: a #GstSDPResult
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_message_copy (const GstSDPMessage * msg, GstSDPMessage ** copy)
{
GstSDPResult ret;
GstSDPMessage *cp;
guint i, len;
if (msg == NULL)
return GST_SDP_EINVAL;
ret = gst_sdp_message_new (copy);
if (ret != GST_SDP_OK)
return ret;
cp = *copy;
REPLACE_STRING (cp->version, msg->version);
gst_sdp_message_set_origin (cp, msg->origin.username, msg->origin.sess_id,
msg->origin.sess_version, msg->origin.nettype, msg->origin.addrtype,
msg->origin.addr);
REPLACE_STRING (cp->session_name, msg->session_name);
REPLACE_STRING (cp->information, msg->information);
REPLACE_STRING (cp->uri, msg->uri);
len = gst_sdp_message_emails_len (msg);
for (i = 0; i < len; i++) {
gst_sdp_message_add_email (cp, gst_sdp_message_get_email (msg, i));
}
len = gst_sdp_message_phones_len (msg);
for (i = 0; i < len; i++) {
gst_sdp_message_add_phone (cp, gst_sdp_message_get_phone (msg, i));
}
gst_sdp_message_set_connection (cp, msg->connection.nettype,
msg->connection.addrtype, msg->connection.address, msg->connection.ttl,
msg->connection.addr_number);
len = gst_sdp_message_bandwidths_len (msg);
for (i = 0; i < len; i++) {
const GstSDPBandwidth *bw = gst_sdp_message_get_bandwidth (msg, i);
gst_sdp_message_add_bandwidth (cp, bw->bwtype, bw->bandwidth);
}
len = gst_sdp_message_times_len (msg);
for (i = 0; i < len; i++) {
const gchar **repeat = NULL;
const GstSDPTime *time = gst_sdp_message_get_time (msg, i);
if (time->repeat != NULL) {
guint j;
repeat = g_malloc0 ((time->repeat->len + 1) * sizeof (gchar *));
for (j = 0; j < time->repeat->len; j++) {
repeat[j] = g_array_index (time->repeat, char *, j);
}
repeat[j] = NULL;
}
gst_sdp_message_add_time (cp, time->start, time->stop, repeat);
g_free ((gchar **) repeat);
}
len = gst_sdp_message_zones_len (msg);
for (i = 0; i < len; i++) {
const GstSDPZone *zone = gst_sdp_message_get_zone (msg, i);
gst_sdp_message_add_zone (cp, zone->time, zone->typed_time);
}
gst_sdp_message_set_key (cp, msg->key.type, msg->key.data);
len = gst_sdp_message_attributes_len (msg);
for (i = 0; i < len; i++) {
const GstSDPAttribute *attr = gst_sdp_message_get_attribute (msg, i);
gst_sdp_message_add_attribute (cp, attr->key, attr->value);
}
len = gst_sdp_message_medias_len (msg);
for (i = 0; i < len; i++) {
GstSDPMedia *media_copy;
const GstSDPMedia *media = gst_sdp_message_get_media (msg, i);
if (gst_sdp_media_copy (media, &media_copy) == GST_SDP_OK) {
gst_sdp_message_add_media (cp, media_copy);
gst_sdp_media_free (media_copy);
}
}
return GST_SDP_OK;
}
/**
* gst_sdp_message_free:
* @msg: a #GstSDPMessage
*
* Free all resources allocated by @msg. @msg should not be used anymore after
* this function. This function should be used when @msg was dynamically
* allocated with gst_sdp_message_new().
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_message_free (GstSDPMessage * msg)
{
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
gst_sdp_message_uninit (msg);
g_free (msg);
return GST_SDP_OK;
}
/**
* gst_sdp_address_is_multicast:
* @nettype: a network type
* @addrtype: an address type
* @addr: an address
*
* Check if the given @addr is a multicast address.
*
* Returns: TRUE when @addr is multicast.
*/
gboolean
gst_sdp_address_is_multicast (const gchar * nettype, const gchar * addrtype,
const gchar * addr)
{
gboolean ret = FALSE;
GInetAddress *iaddr;
g_return_val_if_fail (addr, FALSE);
/* we only support IN */
if (nettype && strcmp (nettype, "IN") != 0)
return FALSE;
/* guard against parse failures */
if ((iaddr = g_inet_address_new_from_string (addr)) == NULL)
return FALSE;
ret = g_inet_address_get_is_multicast (iaddr);
g_object_unref (iaddr);
return ret;
}
/**
* gst_sdp_message_as_text:
* @msg: a #GstSDPMessage
*
* Convert the contents of @msg to a text string.
*
* Returns: A dynamically allocated string representing the SDP description.
*/
gchar *
gst_sdp_message_as_text (const GstSDPMessage * msg)
{
/* change all vars so they match rfc? */
GString *lines;
guint i;
g_return_val_if_fail (msg != NULL, NULL);
lines = g_string_new ("");
if (msg->version)
g_string_append_printf (lines, "v=%s\r\n", msg->version);
if (msg->origin.sess_id && msg->origin.sess_version && msg->origin.nettype &&
msg->origin.addrtype && msg->origin.addr)
g_string_append_printf (lines, "o=%s %s %s %s %s %s\r\n",
msg->origin.username ? msg->origin.username : "-", msg->origin.sess_id,
msg->origin.sess_version, msg->origin.nettype, msg->origin.addrtype,
msg->origin.addr);
if (msg->session_name)
g_string_append_printf (lines, "s=%s\r\n", msg->session_name);
if (msg->information)
g_string_append_printf (lines, "i=%s\r\n", msg->information);
if (msg->uri)
g_string_append_printf (lines, "u=%s\r\n", msg->uri);
for (i = 0; i < gst_sdp_message_emails_len (msg); i++)
g_string_append_printf (lines, "e=%s\r\n",
gst_sdp_message_get_email (msg, i));
for (i = 0; i < gst_sdp_message_phones_len (msg); i++)
g_string_append_printf (lines, "p=%s\r\n",
gst_sdp_message_get_phone (msg, i));
if (msg->connection.nettype && msg->connection.addrtype &&
msg->connection.address) {
g_string_append_printf (lines, "c=%s %s %s", msg->connection.nettype,
msg->connection.addrtype, msg->connection.address);
if (gst_sdp_address_is_multicast (msg->connection.nettype,
msg->connection.addrtype, msg->connection.address)) {
/* only add ttl for IP4 */
if (strcmp (msg->connection.addrtype, "IP4") == 0)
g_string_append_printf (lines, "/%u", msg->connection.ttl);
if (msg->connection.addr_number > 1)
g_string_append_printf (lines, "/%u", msg->connection.addr_number);
}
g_string_append_printf (lines, "\r\n");
}
for (i = 0; i < gst_sdp_message_bandwidths_len (msg); i++) {
const GstSDPBandwidth *bandwidth = gst_sdp_message_get_bandwidth (msg, i);
g_string_append_printf (lines, "b=%s:%u\r\n", bandwidth->bwtype,
bandwidth->bandwidth);
}
if (gst_sdp_message_times_len (msg) == 0) {
g_string_append_printf (lines, "t=0 0\r\n");
} else {
for (i = 0; i < gst_sdp_message_times_len (msg); i++) {
const GstSDPTime *times = gst_sdp_message_get_time (msg, i);
g_string_append_printf (lines, "t=%s %s\r\n", times->start, times->stop);
if (times->repeat != NULL) {
guint j;
g_string_append_printf (lines, "r=%s",
g_array_index (times->repeat, gchar *, 0));
for (j = 1; j < times->repeat->len; j++)
g_string_append_printf (lines, " %s",
g_array_index (times->repeat, gchar *, j));
g_string_append_printf (lines, "\r\n");
}
}
}
if (gst_sdp_message_zones_len (msg) > 0) {
const GstSDPZone *zone = gst_sdp_message_get_zone (msg, 0);
g_string_append_printf (lines, "z=%s %s", zone->time, zone->typed_time);
for (i = 1; i < gst_sdp_message_zones_len (msg); i++) {
zone = gst_sdp_message_get_zone (msg, i);
g_string_append_printf (lines, " %s %s", zone->time, zone->typed_time);
}
g_string_append_printf (lines, "\r\n");
}
if (msg->key.type) {
g_string_append_printf (lines, "k=%s", msg->key.type);
if (msg->key.data)
g_string_append_printf (lines, ":%s", msg->key.data);
g_string_append_printf (lines, "\r\n");
}
for (i = 0; i < gst_sdp_message_attributes_len (msg); i++) {
const GstSDPAttribute *attr = gst_sdp_message_get_attribute (msg, i);
if (attr->key) {
g_string_append_printf (lines, "a=%s", attr->key);
if (attr->value && attr->value[0] != '\0')
g_string_append_printf (lines, ":%s", attr->value);
g_string_append_printf (lines, "\r\n");
}
}
for (i = 0; i < gst_sdp_message_medias_len (msg); i++) {
const GstSDPMedia *media = gst_sdp_message_get_media (msg, i);
gchar *sdp_media_str;
sdp_media_str = gst_sdp_media_as_text (media);
g_string_append_printf (lines, "%s", sdp_media_str);
g_free (sdp_media_str);
}
return g_string_free (lines, FALSE);
}
static int
hex_to_int (gchar c)
{
return c >= '0' && c <= '9' ? c - '0'
: c >= 'A' && c <= 'F' ? c - 'A' + 10
: c >= 'a' && c <= 'f' ? c - 'a' + 10 : 0;
}
/**
* gst_sdp_message_parse_uri:
* @uri: the start of the uri
* @msg: the result #GstSDPMessage
*
* Parse the null-terminated @uri and store the result in @msg.
*
* The uri should be of the form:
*
* scheme://[address[:ttl=ttl][:noa=noa]]/[sessionname]
* [#type=value *[&type=value]]
*
* where value is url encoded. This looslely resembles
* http://tools.ietf.org/html/draft-fujikawa-sdp-url-01
*
* Returns: #GST_SDP_OK on success.
*/
GstSDPResult
gst_sdp_message_parse_uri (const gchar * uri, GstSDPMessage * msg)
{
GstSDPResult res;
gchar *message;
const gchar *colon, *slash, *hash, *p;
GString *lines;
g_return_val_if_fail (uri != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
colon = strstr (uri, "://");
if (!colon)
goto no_colon;
/* FIXME connection info goes here */
slash = strstr (colon + 3, "/");
if (!slash)
goto no_slash;
/* FIXME session name goes here */
hash = strstr (slash + 1, "#");
if (!hash)
goto no_hash;
lines = g_string_new ("");
/* unescape */
for (p = hash + 1; *p; p++) {
if (*p == '&')
g_string_append_printf (lines, "\r\n");
else if (*p == '+')
g_string_append_c (lines, ' ');
else if (*p == '%') {
gchar a, b;
if ((a = p[1])) {
if ((b = p[2])) {
g_string_append_c (lines, (hex_to_int (a) << 4) | hex_to_int (b));
p += 2;
}
} else {
p++;
}
} else
g_string_append_c (lines, *p);
}
message = g_string_free (lines, FALSE);
res =
gst_sdp_message_parse_buffer ((const guint8 *) message, strlen (message),
msg);
g_free (message);
return res;
/* ERRORS */
no_colon:
{
return GST_SDP_EINVAL;
}
no_slash:
{
return GST_SDP_EINVAL;
}
no_hash:
{
return GST_SDP_EINVAL;
}
}
static const guchar acceptable[96] = {
/* X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 XA XB XC XD XE XF */
0x00, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x00, 0x01, 0x01, 0x01, 0x00, /* 2X !"#$%&'()*+,-./ */
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 3X 0123456789:;<=>? */
0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, /* 4X @ABCDEFGHIJKLMNO */
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01, /* 5X PQRSTUVWXYZ[\]^_ */
0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, /* 6X `abcdefghijklmno */
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 /* 7X pqrstuvwxyz{|}~DEL */
};
static const gchar hex[16] = "0123456789ABCDEF";
#define ACCEPTABLE_CHAR(a) (((guchar)(a))>=32 && ((guchar)(a))<128 && acceptable[(((guchar)a))-32])
/**
* gst_sdp_message_as_uri:
* @scheme: the uri scheme
* @msg: the #GstSDPMessage
*
* Creates a uri from @msg with the given @scheme. The uri has the format:
*
* \@scheme:///[#type=value *[&type=value]]
*
* Where each value is url encoded.
*
* Returns: a uri for @msg.
*/
gchar *
gst_sdp_message_as_uri (const gchar * scheme, const GstSDPMessage * msg)
{
gchar *serialized, *p;
gchar *res;
GString *lines;
gboolean first;
g_return_val_if_fail (scheme != NULL, NULL);
g_return_val_if_fail (msg != NULL, NULL);
p = serialized = gst_sdp_message_as_text (msg);
lines = g_string_new ("");
g_string_append_printf (lines, "%s:///#", scheme);
/* now escape */
first = TRUE;
for (p = serialized; *p; p++) {
if (first) {
g_string_append_printf (lines, "%c=", *p);
if (*(p + 1))
p++;
first = FALSE;
continue;
}
if (*p == '\r')
continue;
else if (*p == '\n') {
if (*(p + 1))
g_string_append_c (lines, '&');
first = TRUE;
} else if (*p == ' ')
g_string_append_c (lines, '+');
else if (ACCEPTABLE_CHAR (*p))
g_string_append_c (lines, *p);
else {
/* escape */
g_string_append_printf (lines, "%%%c%c", hex[*p >> 4], hex[*p & 0xf]);
}
}
res = g_string_free (lines, FALSE);
g_free (serialized);
return res;
}
/**
* gst_sdp_message_set_version:
* @msg: a #GstSDPMessage
* @version: the version
*
* Set the version in @msg.
*
* Returns: a #GstSDPResult.
*/
DEFINE_STRING_SETTER (version);
/**
* gst_sdp_message_get_version:
* @msg: a #GstSDPMessage
*
* Get the version in @msg.
*
* Returns: a #GstSDPResult.
*/
DEFINE_STRING_GETTER (version);
/**
* gst_sdp_message_set_origin:
* @msg: a #GstSDPMessage
* @username: the user name
* @sess_id: a session id
* @sess_version: a session version
* @nettype: a network type
* @addrtype: an address type
* @addr: an address
*
* Configure the SDP origin in @msg with the given parameters.
*
* Returns: #GST_SDP_OK.
*/
GstSDPResult
gst_sdp_message_set_origin (GstSDPMessage * msg, const gchar * username,
const gchar * sess_id, const gchar * sess_version, const gchar * nettype,
const gchar * addrtype, const gchar * addr)
{
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
REPLACE_STRING (msg->origin.username, username);
REPLACE_STRING (msg->origin.sess_id, sess_id);
REPLACE_STRING (msg->origin.sess_version, sess_version);
REPLACE_STRING (msg->origin.nettype, nettype);
REPLACE_STRING (msg->origin.addrtype, addrtype);
REPLACE_STRING (msg->origin.addr, addr);
return GST_SDP_OK;
}
/**
* gst_sdp_message_get_origin:
* @msg: a #GstSDPMessage
*
* Get the origin of @msg.
*
* Returns: a #GstSDPOrigin. The result remains valid as long as @msg is valid.
*/
const GstSDPOrigin *
gst_sdp_message_get_origin (const GstSDPMessage * msg)
{
g_return_val_if_fail (msg != NULL, NULL);
return &msg->origin;
}
/**
* gst_sdp_message_set_session_name:
* @msg: a #GstSDPMessage
* @session_name: the session name
*
* Set the session name in @msg.
*
* Returns: a #GstSDPResult.
*/
DEFINE_STRING_SETTER (session_name);
/**
* gst_sdp_message_get_session_name:
* @msg: a #GstSDPMessage
*
* Get the session name in @msg.
*
* Returns: a #GstSDPResult.
*/
DEFINE_STRING_GETTER (session_name);
/**
* gst_sdp_message_set_information:
* @msg: a #GstSDPMessage
* @information: the information
*
* Set the information in @msg.
*
* Returns: a #GstSDPResult.
*/
DEFINE_STRING_SETTER (information);
/**
* gst_sdp_message_get_information:
* @msg: a #GstSDPMessage
*
* Get the information in @msg.
*
* Returns: a #GstSDPResult.
*/
DEFINE_STRING_GETTER (information);
/**
* gst_sdp_message_set_uri:
* @msg: a #GstSDPMessage
* @uri: the URI
*
* Set the URI in @msg.
*
* Returns: a #GstSDPResult.
*/
DEFINE_STRING_SETTER (uri);
/**
* gst_sdp_message_get_uri:
* @msg: a #GstSDPMessage
*
* Get the URI in @msg.
*
* Returns: a #GstSDPResult.
*/
DEFINE_STRING_GETTER (uri);
/**
* gst_sdp_message_emails_len:
* @msg: a #GstSDPMessage
*
* Get the number of emails in @msg.
*
* Returns: the number of emails in @msg.
*/
DEFINE_ARRAY_LEN (emails);
/**
* gst_sdp_message_get_email:
* @msg: a #GstSDPMessage
* @idx: an email index
*
* Get the email with number @idx from @msg.
*
* Returns: the email at position @idx.
*/
DEFINE_STR_ARRAY_GETTER (email, emails);
/**
* gst_sdp_message_insert_email:
* @msg: a #GstSDPMessage
* @idx: an index
* @email: an email
*
* Insert @email into the array of emails in @msg at index @idx.
* When -1 is given as @idx, the email is inserted at the end.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_STR_ARRAY_INSERT (email, emails);
/**
* gst_sdp_message_replace_email:
* @msg: a #GstSDPMessage
* @idx: an email index
* @email: an email
*
* Replace the email in @msg at index @idx with @email.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_STR_ARRAY_REPLACE (email, emails);
/**
* gst_sdp_message_remove_email:
* @msg: a #GstSDPMessage
* @idx: an email index
*
* Remove the email in @msg at index @idx.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_STR_ARRAY_REMOVE (email, emails);
/**
* gst_sdp_message_add_email:
* @msg: a #GstSDPMessage
* @email: an email
*
* Add @email to the list of emails in @msg.
*
* Returns: a #GstSDPResult.
*/
DEFINE_STR_ARRAY_ADDER (email, emails);
/**
* gst_sdp_message_phones_len:
* @msg: a #GstSDPMessage
*
* Get the number of phones in @msg.
*
* Returns: the number of phones in @msg.
*/
DEFINE_ARRAY_LEN (phones);
/**
* gst_sdp_message_get_phone:
* @msg: a #GstSDPMessage
* @idx: a phone index
*
* Get the phone with number @idx from @msg.
*
* Returns: the phone at position @idx.
*/
DEFINE_STR_ARRAY_GETTER (phone, phones);
/**
* gst_sdp_message_insert_phone:
* @msg: a #GstSDPMessage
* @idx: a phone index
* @phone: a phone
*
* Insert @phone into the array of phone numbers in @msg at index @idx.
* When -1 is given as @idx, the phone is inserted at the end.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_STR_ARRAY_INSERT (phone, phones);
/**
* gst_sdp_message_replace_phone:
* @msg: a #GstSDPMessage
* @idx: a phone index
* @phone: a phone
*
* Replace the phone number in @msg at index @idx with @phone.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_STR_ARRAY_REPLACE (phone, phones);
/**
* gst_sdp_message_remove_phone:
* @msg: a #GstSDPMessage
* @idx: a phone index
*
* Remove the phone number in @msg at index @idx.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_STR_ARRAY_REMOVE (phone, phones);
/**
* gst_sdp_message_add_phone:
* @msg: a #GstSDPMessage
* @phone: a phone
*
* Add @phone to the list of phones in @msg.
*
* Returns: a #GstSDPResult.
*/
DEFINE_STR_ARRAY_ADDER (phone, phones);
/**
* gst_sdp_message_set_connection:
* @msg: a #GstSDPMessage
* @nettype: the type of network. "IN" is defined to have the meaning
* "Internet".
* @addrtype: the type of address.
* @address: the address
* @ttl: the time to live of the address
* @addr_number: the number of layers
*
* Configure the SDP connection in @msg with the given parameters.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_message_set_connection (GstSDPMessage * msg, const gchar * nettype,
const gchar * addrtype, const gchar * address, guint ttl, guint addr_number)
{
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
REPLACE_STRING (msg->connection.nettype, nettype);
REPLACE_STRING (msg->connection.addrtype, addrtype);
REPLACE_STRING (msg->connection.address, address);
msg->connection.ttl = ttl;
msg->connection.addr_number = addr_number;
return GST_SDP_OK;
}
/**
* gst_sdp_message_get_connection:
* @msg: a #GstSDPMessage
*
* Get the connection of @msg.
*
* Returns: a #GstSDPConnection. The result remains valid as long as @msg is valid.
*/
const GstSDPConnection *
gst_sdp_message_get_connection (const GstSDPMessage * msg)
{
g_return_val_if_fail (msg != NULL, NULL);
return &msg->connection;
}
/**
* gst_sdp_bandwidth_set:
* @bw: a #GstSDPBandwidth
* @bwtype: the bandwidth modifier type
* @bandwidth: the bandwidth in kilobits per second
*
* Set bandwidth information in @bw.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_bandwidth_set (GstSDPBandwidth * bw, const gchar * bwtype,
guint bandwidth)
{
g_return_val_if_fail (bw != NULL, GST_SDP_EINVAL);
bw->bwtype = g_strdup (bwtype);
bw->bandwidth = bandwidth;
return GST_SDP_OK;
}
/**
* gst_sdp_bandwidth_clear:
* @bw: a #GstSDPBandwidth
*
* Reset the bandwidth information in @bw.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_bandwidth_clear (GstSDPBandwidth * bw)
{
g_return_val_if_fail (bw != NULL, GST_SDP_EINVAL);
FREE_STRING (bw->bwtype);
bw->bandwidth = 0;
return GST_SDP_OK;
}
/**
* gst_sdp_message_bandwidths_len:
* @msg: a #GstSDPMessage
*
* Get the number of bandwidth information in @msg.
*
* Returns: the number of bandwidth information in @msg.
*/
DEFINE_ARRAY_LEN (bandwidths);
/**
* gst_sdp_message_get_bandwidth:
* @msg: a #GstSDPMessage
* @idx: the bandwidth index
*
* Get the bandwidth at index @idx from @msg.
*
* Returns: a #GstSDPBandwidth.
*/
DEFINE_ARRAY_GETTER (bandwidth, bandwidths, GstSDPBandwidth);
#define DUP_BANDWIDTH(v, val) memcpy (v, val, sizeof (GstSDPBandwidth))
#define FREE_BANDWIDTH(v) gst_sdp_bandwidth_clear(v)
/**
* gst_sdp_message_insert_bandwidth:
* @msg: a #GstSDPMessage
* @idx: an index
* @bw: the bandwidth
*
* Insert bandwidth parameters into the array of bandwidths in @msg
* at index @idx.
* When -1 is given as @idx, the bandwidth is inserted at the end.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_ARRAY_INSERT (bandwidth, bandwidths, GstSDPBandwidth *, DUP_BANDWIDTH,
GstSDPBandwidth);
/**
* gst_sdp_message_replace_bandwidth:
* @msg: a #GstSDPMessage
* @idx: the bandwidth index
* @bw: the bandwidth
*
* Replace the bandwidth information in @msg at index @idx with @bw.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_ARRAY_REPLACE (bandwidth, bandwidths, GstSDPBandwidth *, FREE_BANDWIDTH,
DUP_BANDWIDTH, GstSDPBandwidth);
/**
* gst_sdp_message_remove_bandwidth:
* @msg: a #GstSDPMessage
* @idx: the bandwidth index
*
* Remove the bandwidth information in @msg at index @idx.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_ARRAY_REMOVE (bandwidth, bandwidths, GstSDPBandwidth, FREE_BANDWIDTH);
/**
* gst_sdp_message_add_bandwidth:
* @msg: a #GstSDPMessage
* @bwtype: the bandwidth modifier type
* @bandwidth: the bandwidth in kilobits per second
*
* Add the specified bandwidth information to @msg.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_message_add_bandwidth (GstSDPMessage * msg, const gchar * bwtype,
guint bandwidth)
{
GstSDPBandwidth bw;
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
gst_sdp_bandwidth_set (&bw, bwtype, bandwidth);
return gst_sdp_message_insert_bandwidth (msg, -1, &bw);
}
/**
* gst_sdp_time_set:
* @t: a #GstSDPTime
* @start: the start time
* @stop: the stop time
* @repeat: (array zero-terminated=1): the repeat times
*
* Set time information @start, @stop and @repeat in @t.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_time_set (GstSDPTime * t, const gchar * start,
const gchar * stop, const gchar ** repeat)
{
g_return_val_if_fail (t != NULL, GST_SDP_EINVAL);
t->start = g_strdup (start);
t->stop = g_strdup (stop);
if (repeat) {
t->repeat = g_array_new (FALSE, TRUE, sizeof (gchar *));
for (; *repeat; repeat++) {
gchar *r = g_strdup (*repeat);
g_array_append_val (t->repeat, r);
}
} else
t->repeat = NULL;
return GST_SDP_OK;
}
/**
* gst_sdp_time_clear:
* @t: a #GstSDPTime
*
* Reset the time information in @t.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_time_clear (GstSDPTime * t)
{
g_return_val_if_fail (t != NULL, GST_SDP_EINVAL);
FREE_STRING (t->start);
FREE_STRING (t->stop);
INIT_STR_ARRAY (t->repeat);
FREE_ARRAY (t->repeat);
return GST_SDP_OK;
}
/**
* gst_sdp_message_times_len:
* @msg: a #GstSDPMessage
*
* Get the number of time information entries in @msg.
*
* Returns: the number of time information entries in @msg.
*/
DEFINE_ARRAY_LEN (times);
/**
* gst_sdp_message_get_time:
* @msg: a #GstSDPMessage
* @idx: the time index
*
* Get time information with index @idx from @msg.
*
* Returns: a #GstSDPTime.
*/
DEFINE_ARRAY_GETTER (time, times, GstSDPTime);
#define DUP_TIME(v, val) memcpy (v, val, sizeof (GstSDPTime))
#define FREE_TIME(v) gst_sdp_time_clear(v)
/**
* gst_sdp_message_insert_time:
* @msg: a #GstSDPMessage
* @idx: an index
* @t: a #GstSDPTime
*
* Insert time parameters into the array of times in @msg
* at index @idx.
* When -1 is given as @idx, the times are inserted at the end.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_ARRAY_INSERT (time, times, GstSDPTime *, DUP_TIME, GstSDPTime);
/**
* gst_sdp_message_replace_time:
* @msg: a #GstSDPMessage
* @idx: the index
* @t: a #GstSDPTime
*
* Replace the time information in @msg at index @idx with @t.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_ARRAY_REPLACE (time, times, GstSDPTime *, FREE_TIME,
DUP_TIME, GstSDPTime);
/**
* gst_sdp_message_remove_time:
* @msg: a #GstSDPMessage
* @idx: the index
*
* Remove the time information in @msg at index @idx.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_ARRAY_REMOVE (time, times, GstSDPTime, FREE_TIME);
/**
* gst_sdp_message_add_time:
* @msg: a #GstSDPMessage
* @start: the start time
* @stop: the stop time
* @repeat: (array zero-terminated=1): the repeat times
*
* Add time information @start and @stop to @msg.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_message_add_time (GstSDPMessage * msg, const gchar * start,
const gchar * stop, const gchar ** repeat)
{
GstSDPTime times;
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
gst_sdp_time_set (&times, start, stop, repeat);
g_array_append_val (msg->times, times);
return GST_SDP_OK;
}
/**
* gst_sdp_zone_set:
* @zone: a #GstSDPZone
* @adj_time: the NTP time that a time zone adjustment happens
* @typed_time: the offset from the time when the session was first scheduled
*
* Set zone information in @zone.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_zone_set (GstSDPZone * zone, const gchar * adj_time,
const gchar * typed_time)
{
g_return_val_if_fail (zone != NULL, GST_SDP_EINVAL);
zone->time = g_strdup (adj_time);
zone->typed_time = g_strdup (typed_time);
return GST_SDP_OK;
}
/**
* gst_sdp_zone_clear:
* @zone: a #GstSDPZone
*
* Reset the zone information in @zone.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_zone_clear (GstSDPZone * zone)
{
g_return_val_if_fail (zone != NULL, GST_SDP_EINVAL);
FREE_STRING (zone->time);
FREE_STRING (zone->typed_time);
return GST_SDP_OK;
}
/**
* gst_sdp_message_zones_len:
* @msg: a #GstSDPMessage
*
* Get the number of time zone information entries in @msg.
*
* Returns: the number of time zone information entries in @msg.
*/
DEFINE_ARRAY_LEN (zones);
/**
* gst_sdp_message_get_zone:
* @msg: a #GstSDPMessage
* @idx: the zone index
*
* Get time zone information with index @idx from @msg.
*
* Returns: a #GstSDPZone.
*/
DEFINE_ARRAY_GETTER (zone, zones, GstSDPZone);
#define DUP_ZONE(v, val) memcpy (v, val, sizeof (GstSDPZone))
#define FREE_ZONE(v) gst_sdp_zone_clear(v)
/**
* gst_sdp_message_insert_zone:
* @msg: a #GstSDPMessage
* @idx: an index
* @zone a #GstSDPZone
*
* Insert zone parameters into the array of zones in @msg
* at index @idx.
* When -1 is given as @idx, the zone is inserted at the end.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_ARRAY_INSERT (zone, zones, GstSDPZone *, DUP_ZONE, GstSDPZone);
/**
* gst_sdp_message_replace_zone:
* @msg: a #GstSDPMessage
* @idx: the index
* @zone: a #GstSDPZone
*
* Replace the zone information in @msg at index @idx with @zone.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_ARRAY_REPLACE (zone, zones, GstSDPZone *, FREE_ZONE,
DUP_ZONE, GstSDPZone);
/**
* gst_sdp_message_remove_zone:
* @msg: a #GstSDPMessage
* @idx: the index
*
* Remove the zone information in @msg at index @idx.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_ARRAY_REMOVE (zone, zones, GstSDPZone, FREE_ZONE);
/**
* gst_sdp_message_add_zone:
* @msg: a #GstSDPMessage
* @adj_time: the NTP time that a time zone adjustment happens
* @typed_time: the offset from the time when the session was first scheduled
*
* Add time zone information to @msg.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_message_add_zone (GstSDPMessage * msg, const gchar * adj_time,
const gchar * typed_time)
{
GstSDPZone zone;
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
gst_sdp_zone_set (&zone, adj_time, typed_time);
g_array_append_val (msg->zones, zone);
return GST_SDP_OK;
}
/**
* gst_sdp_message_set_key:
* @msg: a #GstSDPMessage
* @type: the encryption type
* @data: the encryption data
*
* Adds the encryption information to @msg.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_message_set_key (GstSDPMessage * msg, const gchar * type,
const gchar * data)
{
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
REPLACE_STRING (msg->key.type, type);
REPLACE_STRING (msg->key.data, data);
return GST_SDP_OK;
}
/**
* gst_sdp_message_get_key:
* @msg: a #GstSDPMessage
*
* Get the encryption information from @msg.
*
* Returns: a #GstSDPKey.
*/
const GstSDPKey *
gst_sdp_message_get_key (const GstSDPMessage * msg)
{
g_return_val_if_fail (msg != NULL, NULL);
return &msg->key;
}
/**
* gst_sdp_attribute_set:
* @attr: a #GstSDPAttribute
* @key: the key
* @value: (nullable): the value
*
* Set the attribute with @key and @value.
*
* Returns: @GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_attribute_set (GstSDPAttribute * attr, const gchar * key,
const gchar * value)
{
g_return_val_if_fail (attr != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (key != NULL, GST_SDP_EINVAL);
attr->key = g_strdup (key);
attr->value = g_strdup (value);
return GST_SDP_OK;
}
/**
* gst_sdp_attribute_clear:
* @attr: a #GstSDPAttribute
*
* Clear the attribute.
*
* Returns: @GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_attribute_clear (GstSDPAttribute * attr)
{
g_return_val_if_fail (attr != NULL, GST_SDP_EINVAL);
FREE_STRING (attr->key);
FREE_STRING (attr->value);
return GST_SDP_OK;
}
/**
* gst_sdp_message_attributes_len:
* @msg: a #GstSDPMessage
*
* Get the number of attributes in @msg.
*
* Returns: the number of attributes in @msg.
*/
DEFINE_ARRAY_LEN (attributes);
/**
* gst_sdp_message_get_attribute:
* @msg: a #GstSDPMessage
* @idx: the index
*
* Get the attribute at position @idx in @msg.
*
* Returns: the #GstSDPAttribute at position @idx.
*/
DEFINE_ARRAY_GETTER (attribute, attributes, GstSDPAttribute);
/**
* gst_sdp_message_get_attribute_val_n:
* @msg: a #GstSDPMessage
* @key: the key
* @nth: the index
*
* Get the @nth attribute with key @key in @msg.
*
* Returns: the attribute value of the @nth attribute with @key.
*/
const gchar *
gst_sdp_message_get_attribute_val_n (const GstSDPMessage * msg,
const gchar * key, guint nth)
{
guint i;
g_return_val_if_fail (msg != NULL, NULL);
g_return_val_if_fail (key != NULL, NULL);
for (i = 0; i < msg->attributes->len; i++) {
GstSDPAttribute *attr;
attr = &g_array_index (msg->attributes, GstSDPAttribute, i);
if (!strcmp (attr->key, key)) {
if (nth == 0)
return attr->value;
else
nth--;
}
}
return NULL;
}
/**
* gst_sdp_message_get_attribute_val:
* @msg: a #GstSDPMessage
* @key: the key
*
* Get the first attribute with key @key in @msg.
*
* Returns: the attribute value of the first attribute with @key.
*/
const gchar *
gst_sdp_message_get_attribute_val (const GstSDPMessage * msg, const gchar * key)
{
return gst_sdp_message_get_attribute_val_n (msg, key, 0);
}
#define DUP_ATTRIBUTE(v, val) memcpy (v, val, sizeof (GstSDPAttribute))
#define FREE_ATTRIBUTE(v) gst_sdp_attribute_clear(v)
/**
* gst_sdp_message_insert_attribute:
* @msg: a #GstSDPMessage
* @idx: an index
* @attr: a #GstSDPAttribute
*
* Insert attribute into the array of attributes in @msg
* at index @idx.
* When -1 is given as @idx, the attribute is inserted at the end.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_ARRAY_INSERT (attribute, attributes, GstSDPAttribute *, DUP_ATTRIBUTE,
GstSDPAttribute);
/**
* gst_sdp_message_replace_attribute:
* @msg: a #GstSDPMessage
* @idx: the index
* @attr: a #GstSDPAttribute
*
* Replace the attribute in @msg at index @idx with @attr.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_ARRAY_REPLACE (attribute, attributes, GstSDPAttribute *, FREE_ATTRIBUTE,
DUP_ATTRIBUTE, GstSDPAttribute);
/**
* gst_sdp_message_remove_attribute:
* @msg: a #GstSDPMessage
* @idx: the index
*
* Remove the attribute in @msg at index @idx.
*
* Returns: a #GstSDPResult.
*
* Since: 1.2
*/
DEFINE_ARRAY_REMOVE (attribute, attributes, GstSDPAttribute, FREE_ATTRIBUTE);
/**
* gst_sdp_message_add_attribute:
* @msg: a #GstSDPMessage
* @key: the key
* @value: (nullable): the value
*
* Add the attribute with @key and @value to @msg.
*
* Returns: @GST_SDP_OK.
*/
GstSDPResult
gst_sdp_message_add_attribute (GstSDPMessage * msg, const gchar * key,
const gchar * value)
{
GstSDPAttribute attr;
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (key != NULL, GST_SDP_EINVAL);
gst_sdp_attribute_set (&attr, key, value);
g_array_append_val (msg->attributes, attr);
return GST_SDP_OK;
}
/**
* gst_sdp_message_medias_len:
* @msg: a #GstSDPMessage
*
* Get the number of media descriptions in @msg.
*
* Returns: the number of media descriptions in @msg.
*/
DEFINE_ARRAY_LEN (medias);
/**
* gst_sdp_message_get_media:
* @msg: a #GstSDPMessage
* @idx: the index
*
* Get the media description at index @idx in @msg.
*
* Returns: a #GstSDPMedia.
*/
DEFINE_ARRAY_GETTER (media, medias, GstSDPMedia);
/**
* gst_sdp_message_add_media:
* @msg: a #GstSDPMessage
* @media: a #GstSDPMedia to add
*
* Adds @media to the array of medias in @msg. This function takes ownership of
* the contents of @media so that @media will have to be reinitialized with
* gst_sdp_media_init() before it can be used again.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_message_add_media (GstSDPMessage * msg, GstSDPMedia * media)
{
guint len;
GstSDPMedia *nmedia;
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
len = msg->medias->len;
g_array_set_size (msg->medias, len + 1);
nmedia = &g_array_index (msg->medias, GstSDPMedia, len);
memcpy (nmedia, media, sizeof (GstSDPMedia));
memset (media, 0, sizeof (GstSDPMedia));
return GST_SDP_OK;
}
/* media access */
/**
* gst_sdp_media_new:
* @media: (out) (transfer full): pointer to new #GstSDPMedia
*
* Allocate a new GstSDPMedia and store the result in @media.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_media_new (GstSDPMedia ** media)
{
GstSDPMedia *newmedia;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
newmedia = g_new0 (GstSDPMedia, 1);
*media = newmedia;
return gst_sdp_media_init (newmedia);
}
/**
* gst_sdp_media_init:
* @media: a #GstSDPMedia
*
* Initialize @media so that its contents are as if it was freshly allocated
* with gst_sdp_media_new(). This function is mostly used to initialize a media
* allocated on the stack. gst_sdp_media_uninit() undoes this operation.
*
* When this function is invoked on newly allocated data (with malloc or on the
* stack), its contents should be set to 0 before calling this function.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_media_init (GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
FREE_STRING (media->media);
media->port = 0;
media->num_ports = 0;
FREE_STRING (media->proto);
INIT_STR_ARRAY (media->fmts);
FREE_STRING (media->information);
INIT_ARRAY (media->connections, GstSDPConnection, gst_sdp_connection_clear);
INIT_ARRAY (media->bandwidths, GstSDPBandwidth, gst_sdp_bandwidth_clear);
gst_sdp_key_init (&media->key);
INIT_ARRAY (media->attributes, GstSDPAttribute, gst_sdp_attribute_clear);
return GST_SDP_OK;
}
/**
* gst_sdp_media_uninit:
* @media: a #GstSDPMedia
*
* Free all resources allocated in @media. @media should not be used anymore after
* this function. This function should be used when @media was allocated on the
* stack and initialized with gst_sdp_media_init().
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_media_uninit (GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
gst_sdp_media_init (media);
FREE_ARRAY (media->fmts);
FREE_ARRAY (media->connections);
FREE_ARRAY (media->bandwidths);
FREE_ARRAY (media->attributes);
return GST_SDP_OK;
}
/**
* gst_sdp_media_free:
* @media: a #GstSDPMedia
*
* Free all resources allocated by @media. @media should not be used anymore after
* this function. This function should be used when @media was dynamically
* allocated with gst_sdp_media_new().
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_media_free (GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
gst_sdp_media_uninit (media);
g_free (media);
return GST_SDP_OK;
}
/**
* gst_sdp_media_copy:
* @media: a #GstSDPMedia
* @copy: (out) (transfer full): pointer to new #GstSDPMedia
*
* Allocate a new copy of @media and store the result in @copy. The value in
* @copy should be release with gst_sdp_media_free function.
*
* Returns: a #GstSDPResult
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_copy (const GstSDPMedia * media, GstSDPMedia ** copy)
{
GstSDPResult ret;
GstSDPMedia *cp;
guint i, len;
if (media == NULL)
return GST_SDP_EINVAL;
ret = gst_sdp_media_new (copy);
if (ret != GST_SDP_OK)
return ret;
cp = *copy;
REPLACE_STRING (cp->media, media->media);
cp->port = media->port;
cp->num_ports = media->num_ports;
REPLACE_STRING (cp->proto, media->proto);
len = gst_sdp_media_formats_len (media);
for (i = 0; i < len; i++) {
gst_sdp_media_add_format (cp, gst_sdp_media_get_format (media, i));
}
REPLACE_STRING (cp->information, media->information);
len = gst_sdp_media_connections_len (media);
for (i = 0; i < len; i++) {
const GstSDPConnection *connection =
gst_sdp_media_get_connection (media, i);
gst_sdp_media_add_connection (cp, connection->nettype, connection->addrtype,
connection->address, connection->ttl, connection->addr_number);
}
len = gst_sdp_media_bandwidths_len (media);
for (i = 0; i < len; i++) {
const GstSDPBandwidth *bw = gst_sdp_media_get_bandwidth (media, i);
gst_sdp_media_add_bandwidth (cp, bw->bwtype, bw->bandwidth);
}
gst_sdp_media_set_key (cp, media->key.type, media->key.data);
len = gst_sdp_media_attributes_len (media);
for (i = 0; i < len; i++) {
const GstSDPAttribute *att = gst_sdp_media_get_attribute (media, i);
gst_sdp_media_add_attribute (cp, att->key, att->value);
}
return GST_SDP_OK;
}
/**
* gst_sdp_media_as_text:
* @media: a #GstSDPMedia
*
* Convert the contents of @media to a text string.
*
* Returns: A dynamically allocated string representing the media.
*/
gchar *
gst_sdp_media_as_text (const GstSDPMedia * media)
{
GString *lines;
guint i;
g_return_val_if_fail (media != NULL, NULL);
lines = g_string_new ("");
if (media->media)
g_string_append_printf (lines, "m=%s", media->media);
g_string_append_printf (lines, " %u", media->port);
if (media->num_ports > 1)
g_string_append_printf (lines, "/%u", media->num_ports);
g_string_append_printf (lines, " %s", media->proto);
for (i = 0; i < gst_sdp_media_formats_len (media); i++)
g_string_append_printf (lines, " %s", gst_sdp_media_get_format (media, i));
g_string_append_printf (lines, "\r\n");
if (media->information)
g_string_append_printf (lines, "i=%s", media->information);
for (i = 0; i < gst_sdp_media_connections_len (media); i++) {
const GstSDPConnection *conn = gst_sdp_media_get_connection (media, i);
if (conn->nettype && conn->addrtype && conn->address) {
g_string_append_printf (lines, "c=%s %s %s", conn->nettype,
conn->addrtype, conn->address);
if (gst_sdp_address_is_multicast (conn->nettype, conn->addrtype,
conn->address)) {
/* only add TTL for IP4 multicast */
if (strcmp (conn->addrtype, "IP4") == 0)
g_string_append_printf (lines, "/%u", conn->ttl);
if (conn->addr_number > 1)
g_string_append_printf (lines, "/%u", conn->addr_number);
}
g_string_append_printf (lines, "\r\n");
}
}
for (i = 0; i < gst_sdp_media_bandwidths_len (media); i++) {
const GstSDPBandwidth *bandwidth = gst_sdp_media_get_bandwidth (media, i);
g_string_append_printf (lines, "b=%s:%u\r\n", bandwidth->bwtype,
bandwidth->bandwidth);
}
if (media->key.type) {
g_string_append_printf (lines, "k=%s", media->key.type);
if (media->key.data)
g_string_append_printf (lines, ":%s", media->key.data);
g_string_append_printf (lines, "\r\n");
}
for (i = 0; i < gst_sdp_media_attributes_len (media); i++) {
const GstSDPAttribute *attr = gst_sdp_media_get_attribute (media, i);
if (attr->key) {
g_string_append_printf (lines, "a=%s", attr->key);
if (attr->value && attr->value[0] != '\0')
g_string_append_printf (lines, ":%s", attr->value);
g_string_append_printf (lines, "\r\n");
}
}
return g_string_free (lines, FALSE);
}
/**
* gst_sdp_media_get_media:
* @media: a #GstSDPMedia
*
* Get the media description of @media.
*
* Returns: the media description.
*/
const gchar *
gst_sdp_media_get_media (const GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, NULL);
return media->media;
}
/**
* gst_sdp_media_set_media:
* @media: a #GstSDPMedia
* @med: the media description
*
* Set the media description of @media to @med.
*
* Returns: #GST_SDP_OK.
*/
GstSDPResult
gst_sdp_media_set_media (GstSDPMedia * media, const gchar * med)
{
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (med != NULL, GST_SDP_EINVAL);
g_free (media->media);
media->media = g_strdup (med);
return GST_SDP_OK;
}
/**
* gst_sdp_media_get_port:
* @media: a #GstSDPMedia
*
* Get the port number for @media.
*
* Returns: the port number of @media.
*/
guint
gst_sdp_media_get_port (const GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, 0);
return media->port;
}
/**
* gst_sdp_media_get_num_ports:
* @media: a #GstSDPMedia
*
* Get the number of ports for @media.
*
* Returns: the number of ports for @media.
*/
guint
gst_sdp_media_get_num_ports (const GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, 0);
return media->num_ports;
}
/**
* gst_sdp_media_set_port_info:
* @media: a #GstSDPMedia
* @port: the port number
* @num_ports: the number of ports
*
* Set the port information in @media.
*
* Returns: #GST_SDP_OK.
*/
GstSDPResult
gst_sdp_media_set_port_info (GstSDPMedia * media, guint port, guint num_ports)
{
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
media->port = port;
media->num_ports = num_ports;
return GST_SDP_OK;
}
/**
* gst_sdp_media_get_proto:
* @media: a #GstSDPMedia
*
* Get the transport protocol of @media
*
* Returns: the transport protocol of @media.
*/
const gchar *
gst_sdp_media_get_proto (const GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, NULL);
return media->proto;
}
/**
* gst_sdp_media_set_proto:
* @media: a #GstSDPMedia
* @proto: the media transport protocol
*
* Set the media transport protocol of @media to @proto.
*
* Returns: #GST_SDP_OK.
*/
GstSDPResult
gst_sdp_media_set_proto (GstSDPMedia * media, const gchar * proto)
{
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_free (media->proto);
media->proto = g_strdup (proto);
return GST_SDP_OK;
}
/**
* gst_sdp_media_formats_len:
* @media: a #GstSDPMedia
*
* Get the number of formats in @media.
*
* Returns: the number of formats in @media.
*/
guint
gst_sdp_media_formats_len (const GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, 0);
return media->fmts->len;
}
/**
* gst_sdp_media_get_format:
* @media: a #GstSDPMedia
* @idx: an index
*
* Get the format information at position @idx in @media.
*
* Returns: the format at position @idx.
*/
const gchar *
gst_sdp_media_get_format (const GstSDPMedia * media, guint idx)
{
g_return_val_if_fail (media != NULL, NULL);
if (idx >= media->fmts->len)
return NULL;
return g_array_index (media->fmts, gchar *, idx);
}
/**
* gst_sdp_media_insert_format:
* @media: a #GstSDPMedia
* @idx: an index
* @format: the format
*
* Insert the format information to @media at @idx. When @idx is -1,
* the format is appended.
*
* Returns: #GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_insert_format (GstSDPMedia * media, gint idx,
const gchar * format)
{
gchar *fmt;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (format != NULL, GST_SDP_EINVAL);
fmt = g_strdup (format);
if (idx == -1)
g_array_append_val (media->fmts, fmt);
else
g_array_insert_val (media->fmts, idx, fmt);
return GST_SDP_OK;
}
/**
* gst_sdp_media_replace_format:
* @media: a #GstSDPMedia
* @idx: an index
* @format: the format
*
* Replace the format information in @media at @idx with @format.
*
* Returns: #GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_replace_format (GstSDPMedia * media, guint idx,
const gchar * format)
{
gchar **old;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (format != NULL, GST_SDP_EINVAL);
old = &g_array_index (media->fmts, gchar *, idx);
g_free (*old);
*old = g_strdup (format);
return GST_SDP_OK;
}
/**
* gst_sdp_media_remove_format:
* @media: a #GstSDPMedia
* @idx: an index
*
* Remove the format information in @media at @idx.
*
* Returns: #GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_remove_format (GstSDPMedia * media, guint idx)
{
gchar **old;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
old = &g_array_index (media->fmts, gchar *, idx);
g_free (*old);
g_array_remove_index (media->fmts, idx);
return GST_SDP_OK;
}
/**
* gst_sdp_media_add_format:
* @media: a #GstSDPMedia
* @format: the format
*
* Add the format information to @media.
*
* Returns: #GST_SDP_OK.
*/
GstSDPResult
gst_sdp_media_add_format (GstSDPMedia * media, const gchar * format)
{
gchar *fmt;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (format != NULL, GST_SDP_EINVAL);
fmt = g_strdup (format);
g_array_append_val (media->fmts, fmt);
return GST_SDP_OK;
}
/**
* gst_sdp_media_get_information:
* @media: a #GstSDPMedia
*
* Get the information of @media
*
* Returns: the information of @media.
*/
const gchar *
gst_sdp_media_get_information (const GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, NULL);
return media->information;
}
/**
* gst_sdp_media_set_information:
* @media: a #GstSDPMedia
* @information: the media information
*
* Set the media information of @media to @information.
*
* Returns: #GST_SDP_OK.
*/
GstSDPResult
gst_sdp_media_set_information (GstSDPMedia * media, const gchar * information)
{
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_free (media->information);
media->information = g_strdup (information);
return GST_SDP_OK;
}
/**
* gst_sdp_connection_set:
* @conn: a #GstSDPConnection
* @nettype: the type of network. "IN" is defined to have the meaning
* "Internet".
* @addrtype: the type of address.
* @address: the address
* @ttl: the time to live of the address
* @addr_number: the number of layers
*
* Set the connection with the given parameters.
*
* Returns: @GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_connection_set (GstSDPConnection * conn, const gchar * nettype,
const gchar * addrtype, const gchar * address, guint ttl, guint addr_number)
{
g_return_val_if_fail (conn != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (nettype != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (addrtype != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (address != NULL, GST_SDP_EINVAL);
conn->nettype = g_strdup (nettype);
conn->addrtype = g_strdup (addrtype);
conn->address = g_strdup (address);
conn->ttl = ttl;
conn->addr_number = addr_number;
return GST_SDP_OK;
}
/**
* gst_sdp_connection_clear:
* @conn: a #GstSDPConnection
*
* Clear the connection.
*
* Returns: @GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_connection_clear (GstSDPConnection * conn)
{
g_return_val_if_fail (conn != NULL, GST_SDP_EINVAL);
FREE_STRING (conn->nettype);
FREE_STRING (conn->addrtype);
FREE_STRING (conn->address);
conn->ttl = 0;
conn->addr_number = 0;
return GST_SDP_OK;
}
/**
* gst_sdp_media_connections_len:
* @media: a #GstSDPMedia
*
* Get the number of connection fields in @media.
*
* Returns: the number of connections in @media.
*/
guint
gst_sdp_media_connections_len (const GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, 0);
return media->connections->len;
}
/**
* gst_sdp_media_get_connection:
* @media: a #GstSDPMedia
* @idx: an index
*
* Get the connection at position @idx in @media.
*
* Returns: the #GstSDPConnection at position @idx.
*/
const GstSDPConnection *
gst_sdp_media_get_connection (const GstSDPMedia * media, guint idx)
{
g_return_val_if_fail (media != NULL, NULL);
g_return_val_if_fail (idx < media->connections->len, NULL);
return &g_array_index (media->connections, GstSDPConnection, idx);
}
/**
* gst_sdp_media_insert_connection:
* @media: a #GstSDPMedia
* @idx: an index
* @conn: a #GstSDPConnection
*
* Insert the connection information to @media at @idx. When @idx is -1,
* the connection is appended.
*
* Returns: #GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_insert_connection (GstSDPMedia * media, gint idx,
GstSDPConnection * conn)
{
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (conn != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (idx == -1
|| idx < media->connections->len, GST_SDP_EINVAL);
if (idx == -1)
g_array_append_val (media->connections, *conn);
else
g_array_insert_val (media->connections, idx, *conn);
return GST_SDP_OK;
}
/**
* gst_sdp_media_replace_connection:
* @media: a #GstSDPMedia
* @idx: an index
* @conn: a #GstSDPConnection
*
* Replace the connection information in @media at @idx with @conn.
*
* Returns: #GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_replace_connection (GstSDPMedia * media, guint idx,
GstSDPConnection * conn)
{
GstSDPConnection *old;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (conn != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (idx < media->connections->len, GST_SDP_EINVAL);
old = &g_array_index (media->connections, GstSDPConnection, idx);
gst_sdp_connection_clear (old);
*old = *conn;
return GST_SDP_OK;
}
/**
* gst_sdp_media_remove_connection:
* @media: a #GstSDPMedia
* @idx: an index
*
* Remove the connection information in @media at @idx.
*
* Returns: #GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_remove_connection (GstSDPMedia * media, guint idx)
{
GstSDPConnection *old;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (idx < media->connections->len, GST_SDP_EINVAL);
old = &g_array_index (media->connections, GstSDPConnection, idx);
gst_sdp_connection_clear (old);
g_array_remove_index (media->connections, idx);
return GST_SDP_OK;
}
/**
* gst_sdp_media_add_connection:
* @media: a #GstSDPMedia
* @nettype: the type of network. "IN" is defined to have the meaning
* "Internet".
* @addrtype: the type of address.
* @address: the address
* @ttl: the time to live of the address
* @addr_number: the number of layers
*
* Add the given connection parameters to @media.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_media_add_connection (GstSDPMedia * media, const gchar * nettype,
const gchar * addrtype, const gchar * address, guint ttl, guint addr_number)
{
GstSDPConnection conn;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (nettype != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (addrtype != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (address != NULL, GST_SDP_EINVAL);
gst_sdp_connection_set (&conn, nettype, addrtype, address, ttl, addr_number);
g_array_append_val (media->connections, conn);
return GST_SDP_OK;
}
/**
* gst_sdp_media_bandwidths_len:
* @media: a #GstSDPMedia
*
* Get the number of bandwidth fields in @media.
*
* Returns: the number of bandwidths in @media.
*/
guint
gst_sdp_media_bandwidths_len (const GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, 0);
return media->bandwidths->len;
}
/**
* gst_sdp_media_get_bandwidth:
* @media: a #GstSDPMedia
* @idx: an index
*
* Get the bandwidth at position @idx in @media.
*
* Returns: the #GstSDPBandwidth at position @idx.
*/
const GstSDPBandwidth *
gst_sdp_media_get_bandwidth (const GstSDPMedia * media, guint idx)
{
g_return_val_if_fail (media != NULL, NULL);
return &g_array_index (media->bandwidths, GstSDPBandwidth, idx);
}
/**
* gst_sdp_media_insert_bandwidth:
* @media: a #GstSDPMedia
* @idx: an index
* @bw: a #GstSDPBandwidth
*
* Insert the bandwidth information to @media at @idx. When @idx is -1,
* the bandwidth is appended.
*
* Returns: #GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_insert_bandwidth (GstSDPMedia * media, gint idx,
GstSDPBandwidth * bw)
{
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (bw != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (idx == -1
|| idx < media->bandwidths->len, GST_SDP_EINVAL);
if (idx == -1)
g_array_append_val (media->bandwidths, *bw);
else
g_array_insert_val (media->bandwidths, idx, *bw);
return GST_SDP_OK;
}
/**
* gst_sdp_media_replace_bandwidth:
* @media: a #GstSDPMedia
* @idx: an index
* @bw: a #GstSDPBandwidth
*
* Replace the bandwidth information in @media at @idx with @bw.
*
* Returns: #GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_replace_bandwidth (GstSDPMedia * media, guint idx,
GstSDPBandwidth * bw)
{
GstSDPBandwidth *old;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (bw != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (idx < media->bandwidths->len, GST_SDP_EINVAL);
old = &g_array_index (media->bandwidths, GstSDPBandwidth, idx);
gst_sdp_bandwidth_clear (old);
*old = *bw;
return GST_SDP_OK;
}
/**
* gst_sdp_media_remove_bandwidth:
* @media: a #GstSDPMedia
* @idx: an index
*
* Remove the bandwidth information in @media at @idx.
*
* Returns: #GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_remove_bandwidth (GstSDPMedia * media, guint idx)
{
GstSDPBandwidth *old;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (idx < media->bandwidths->len, GST_SDP_EINVAL);
old = &g_array_index (media->bandwidths, GstSDPBandwidth, idx);
gst_sdp_bandwidth_clear (old);
g_array_remove_index (media->bandwidths, idx);
return GST_SDP_OK;
}
/**
* gst_sdp_media_add_bandwidth:
* @media: a #GstSDPMedia
* @bwtype: the bandwidth modifier type
* @bandwidth: the bandwidth in kilobits per second
*
* Add the bandwidth information with @bwtype and @bandwidth to @media.
*
* Returns: #GST_SDP_OK.
*/
GstSDPResult
gst_sdp_media_add_bandwidth (GstSDPMedia * media, const gchar * bwtype,
guint bandwidth)
{
GstSDPBandwidth bw;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (bwtype != NULL, GST_SDP_EINVAL);
gst_sdp_bandwidth_set (&bw, bwtype, bandwidth);
g_array_append_val (media->bandwidths, bw);
return GST_SDP_OK;
}
/**
* gst_sdp_media_set_key:
* @media: a #GstSDPMedia
* @type: the encryption type
* @data: the encryption data
*
* Adds the encryption information to @media.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_media_set_key (GstSDPMedia * media, const gchar * type,
const gchar * data)
{
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_free (media->key.type);
media->key.type = g_strdup (type);
g_free (media->key.data);
media->key.data = g_strdup (data);
return GST_SDP_OK;
}
/**
* gst_sdp_media_get_key:
* @media: a #GstSDPMedia
*
* Get the encryption information from @media.
*
* Returns: a #GstSDPKey.
*/
const GstSDPKey *
gst_sdp_media_get_key (const GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, NULL);
return &media->key;
}
/**
* gst_sdp_media_attributes_len:
* @media: a #GstSDPMedia
*
* Get the number of attribute fields in @media.
*
* Returns: the number of attributes in @media.
*/
guint
gst_sdp_media_attributes_len (const GstSDPMedia * media)
{
g_return_val_if_fail (media != NULL, 0);
return media->attributes->len;
}
/**
* gst_sdp_media_add_attribute:
* @media: a #GstSDPMedia
* @key: a key
* @value: (nullable): a value
*
* Add the attribute with @key and @value to @media.
*
* Returns: #GST_SDP_OK.
*/
GstSDPResult
gst_sdp_media_add_attribute (GstSDPMedia * media, const gchar * key,
const gchar * value)
{
GstSDPAttribute attr;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (key != NULL, GST_SDP_EINVAL);
gst_sdp_attribute_set (&attr, key, value);
g_array_append_val (media->attributes, attr);
return GST_SDP_OK;
}
/**
* gst_sdp_media_get_attribute:
* @media: a #GstSDPMedia
* @idx: an index
*
* Get the attribute at position @idx in @media.
*
* Returns: the #GstSDPAttribute at position @idx.
*/
const GstSDPAttribute *
gst_sdp_media_get_attribute (const GstSDPMedia * media, guint idx)
{
g_return_val_if_fail (media != NULL, NULL);
g_return_val_if_fail (idx < media->attributes->len, NULL);
return &g_array_index (media->attributes, GstSDPAttribute, idx);
}
/**
* gst_sdp_media_get_attribute_val_n:
* @media: a #GstSDPMedia
* @key: a key
* @nth: an index
*
* Get the @nth attribute value for @key in @media.
*
* Returns: the @nth attribute value.
*/
const gchar *
gst_sdp_media_get_attribute_val_n (const GstSDPMedia * media, const gchar * key,
guint nth)
{
guint i;
g_return_val_if_fail (media != NULL, NULL);
g_return_val_if_fail (key != NULL, NULL);
for (i = 0; i < media->attributes->len; i++) {
GstSDPAttribute *attr;
attr = &g_array_index (media->attributes, GstSDPAttribute, i);
if (!strcmp (attr->key, key)) {
if (nth == 0)
return attr->value;
else
nth--;
}
}
return NULL;
}
/**
* gst_sdp_media_get_attribute_val:
* @media: a #GstSDPMedia
* @key: a key
*
* Get the first attribute value for @key in @media.
*
* Returns: the first attribute value for @key.
*/
const gchar *
gst_sdp_media_get_attribute_val (const GstSDPMedia * media, const gchar * key)
{
g_return_val_if_fail (media != NULL, NULL);
g_return_val_if_fail (key != NULL, NULL);
return gst_sdp_media_get_attribute_val_n (media, key, 0);
}
/**
* gst_sdp_media_insert_attribute:
* @media: a #GstSDPMedia
* @idx: an index
* @attr: a #GstSDPAttribute
*
* Insert the attribute to @media at @idx. When @idx is -1,
* the attribute is appended.
*
* Returns: #GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_insert_attribute (GstSDPMedia * media, gint idx,
GstSDPAttribute * attr)
{
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (attr != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (idx == -1
|| idx < media->attributes->len, GST_SDP_EINVAL);
if (idx == -1)
g_array_append_val (media->attributes, *attr);
else
g_array_insert_val (media->attributes, idx, *attr);
return GST_SDP_OK;
}
/**
* gst_sdp_media_replace_attribute:
* @media: a #GstSDPMedia
* @idx: an index
* @attr: a #GstSDPAttribute
*
* Replace the attribute in @media at @idx with @attr.
*
* Returns: #GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_replace_attribute (GstSDPMedia * media, guint idx,
GstSDPAttribute * attr)
{
GstSDPAttribute *old;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (attr != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (idx < media->attributes->len, GST_SDP_EINVAL);
old = &g_array_index (media->attributes, GstSDPAttribute, idx);
gst_sdp_attribute_clear (old);
*old = *attr;
return GST_SDP_OK;
}
/**
* gst_sdp_media_remove_attribute:
* @media: a #GstSDPMedia
* @idx: an index
*
* Remove the attribute in @media at @idx.
*
* Returns: #GST_SDP_OK.
*
* Since: 1.2
*/
GstSDPResult
gst_sdp_media_remove_attribute (GstSDPMedia * media, guint idx)
{
GstSDPAttribute *old;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (idx < media->attributes->len, GST_SDP_EINVAL);
old = &g_array_index (media->attributes, GstSDPAttribute, idx);
gst_sdp_attribute_clear (old);
g_array_remove_index (media->attributes, idx);
return GST_SDP_OK;
}
static void
read_string (gchar * dest, guint size, gchar ** src)
{
guint idx;
idx = 0;
/* skip spaces */
while (g_ascii_isspace (**src))
(*src)++;
while (!g_ascii_isspace (**src) && **src != '\0') {
if (idx < size - 1)
dest[idx++] = **src;
(*src)++;
}
if (size > 0)
dest[idx] = '\0';
}
static void
read_string_del (gchar * dest, guint size, gchar del, gchar ** src)
{
guint idx;
idx = 0;
/* skip spaces */
while (g_ascii_isspace (**src))
(*src)++;
while (**src != del && **src != '\0') {
if (idx < size - 1)
dest[idx++] = **src;
(*src)++;
}
if (size > 0)
dest[idx] = '\0';
}
enum
{
SDP_SESSION,
SDP_MEDIA,
};
typedef struct
{
guint state;
GstSDPMessage *msg;
GstSDPMedia *media;
} SDPContext;
static gboolean
gst_sdp_parse_line (SDPContext * c, gchar type, gchar * buffer)
{
gchar str[8192];
gchar *p = buffer;
#define READ_STRING(field) \
do { read_string (str, sizeof (str), &p); REPLACE_STRING (field, str); } while (0)
#define READ_UINT(field) \
do { read_string (str, sizeof (str), &p); field = strtoul (str, NULL, 10); } while (0)
switch (type) {
case 'v':
if (buffer[0] != '0')
GST_WARNING ("wrong SDP version");
gst_sdp_message_set_version (c->msg, buffer);
break;
case 'o':
READ_STRING (c->msg->origin.username);
READ_STRING (c->msg->origin.sess_id);
READ_STRING (c->msg->origin.sess_version);
READ_STRING (c->msg->origin.nettype);
READ_STRING (c->msg->origin.addrtype);
READ_STRING (c->msg->origin.addr);
break;
case 's':
REPLACE_STRING (c->msg->session_name, buffer);
break;
case 'i':
if (c->state == SDP_SESSION) {
REPLACE_STRING (c->msg->information, buffer);
} else {
REPLACE_STRING (c->media->information, buffer);
}
break;
case 'u':
REPLACE_STRING (c->msg->uri, buffer);
break;
case 'e':
gst_sdp_message_add_email (c->msg, buffer);
break;
case 'p':
gst_sdp_message_add_phone (c->msg, buffer);
break;
case 'c':
{
GstSDPConnection conn;
gchar *str2;
memset (&conn, 0, sizeof (conn));
str2 = p;
while ((str2 = strchr (str2, '/')))
*str2++ = ' ';
READ_STRING (conn.nettype);
READ_STRING (conn.addrtype);
READ_STRING (conn.address);
/* only read TTL for IP4 */
if (strcmp (conn.addrtype, "IP4") == 0)
READ_UINT (conn.ttl);
READ_UINT (conn.addr_number);
if (c->state == SDP_SESSION) {
gst_sdp_message_set_connection (c->msg, conn.nettype, conn.addrtype,
conn.address, conn.ttl, conn.addr_number);
} else {
gst_sdp_media_add_connection (c->media, conn.nettype, conn.addrtype,
conn.address, conn.ttl, conn.addr_number);
}
gst_sdp_connection_clear (&conn);
break;
}
case 'b':
{
gchar str2[32];
read_string_del (str, sizeof (str), ':', &p);
if (*p != '\0')
p++;
read_string (str2, sizeof (str2), &p);
if (c->state == SDP_SESSION)
gst_sdp_message_add_bandwidth (c->msg, str, atoi (str2));
else
gst_sdp_media_add_bandwidth (c->media, str, atoi (str2));
break;
}
case 't':
break;
case 'k':
read_string_del (str, sizeof (str), ':', &p);
if (*p != '\0')
p++;
if (c->state == SDP_SESSION)
gst_sdp_message_set_key (c->msg, str, p);
else
gst_sdp_media_set_key (c->media, str, p);
break;
case 'a':
read_string_del (str, sizeof (str), ':', &p);
if (*p != '\0')
p++;
if (c->state == SDP_SESSION)
gst_sdp_message_add_attribute (c->msg, str, p);
else
gst_sdp_media_add_attribute (c->media, str, p);
break;
case 'm':
{
gchar *slash;
GstSDPMedia nmedia;
c->state = SDP_MEDIA;
memset (&nmedia, 0, sizeof (nmedia));
gst_sdp_media_init (&nmedia);
/* m=<media> <port>/<number of ports> <proto> <fmt> ... */
READ_STRING (nmedia.media);
read_string (str, sizeof (str), &p);
slash = g_strrstr (str, "/");
if (slash) {
*slash = '\0';
nmedia.port = atoi (str);
nmedia.num_ports = atoi (slash + 1);
} else {
nmedia.port = atoi (str);
nmedia.num_ports = 0;
}
READ_STRING (nmedia.proto);
do {
read_string (str, sizeof (str), &p);
gst_sdp_media_add_format (&nmedia, str);
} while (*p != '\0');
gst_sdp_message_add_media (c->msg, &nmedia);
c->media =
&g_array_index (c->msg->medias, GstSDPMedia, c->msg->medias->len - 1);
break;
}
default:
break;
}
return TRUE;
}
/**
* gst_sdp_message_parse_buffer:
* @data: (array length=size): the start of the buffer
* @size: the size of the buffer
* @msg: the result #GstSDPMessage
*
* Parse the contents of @size bytes pointed to by @data and store the result in
* @msg.
*
* Returns: #GST_SDP_OK on success.
*/
GstSDPResult
gst_sdp_message_parse_buffer (const guint8 * data, guint size,
GstSDPMessage * msg)
{
gchar *p, *s;
SDPContext c;
gchar type;
gchar *buffer = NULL;
guint bufsize = 0;
guint len = 0;
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (data != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (size != 0, GST_SDP_EINVAL);
c.state = SDP_SESSION;
c.msg = msg;
c.media = NULL;
#define SIZE_CHECK_GUARD \
G_STMT_START { \
if (p - (gchar *) data >= size) \
goto out; \
} G_STMT_END
p = (gchar *) data;
while (TRUE) {
while (p - (gchar *) data < size && g_ascii_isspace (*p))
p++;
SIZE_CHECK_GUARD;
type = *p++;
if (type == '\0')
break;
SIZE_CHECK_GUARD;
if (*p != '=')
goto line_done;
p++;
SIZE_CHECK_GUARD;
s = p;
while (p - (gchar *) data < size && *p != '\n' && *p != '\r' && *p != '\0')
p++;
len = p - s;
if (bufsize <= len) {
buffer = g_realloc (buffer, len + 1);
bufsize = len + 1;
}
memcpy (buffer, s, len);
buffer[len] = '\0';
gst_sdp_parse_line (&c, type, buffer);
SIZE_CHECK_GUARD;
line_done:
while (p - (gchar *) data < size && *p != '\n' && *p != '\0')
p++;
SIZE_CHECK_GUARD;
if (*p == '\n')
p++;
}
#undef SIZE_CHECK_GUARD
out:
g_free (buffer);
return GST_SDP_OK;
}
static void
print_media (GstSDPMedia * media)
{
g_print (" media: '%s'\n", GST_STR_NULL (media->media));
g_print (" port: '%u'\n", media->port);
g_print (" num_ports: '%u'\n", media->num_ports);
g_print (" proto: '%s'\n", GST_STR_NULL (media->proto));
if (media->fmts->len > 0) {
guint i;
g_print (" formats:\n");
for (i = 0; i < media->fmts->len; i++) {
g_print (" format '%s'\n", g_array_index (media->fmts, gchar *, i));
}
}
g_print (" information: '%s'\n", GST_STR_NULL (media->information));
if (media->connections->len > 0) {
guint i;
g_print (" connections:\n");
for (i = 0; i < media->connections->len; i++) {
GstSDPConnection *conn =
&g_array_index (media->connections, GstSDPConnection, i);
g_print (" nettype: '%s'\n", GST_STR_NULL (conn->nettype));
g_print (" addrtype: '%s'\n", GST_STR_NULL (conn->addrtype));
g_print (" address: '%s'\n", GST_STR_NULL (conn->address));
g_print (" ttl: '%u'\n", conn->ttl);
g_print (" addr_number: '%u'\n", conn->addr_number);
}
}
if (media->bandwidths->len > 0) {
guint i;
g_print (" bandwidths:\n");
for (i = 0; i < media->bandwidths->len; i++) {
GstSDPBandwidth *bw =
&g_array_index (media->bandwidths, GstSDPBandwidth, i);
g_print (" type: '%s'\n", GST_STR_NULL (bw->bwtype));
g_print (" bandwidth: '%u'\n", bw->bandwidth);
}
}
g_print (" key:\n");
g_print (" type: '%s'\n", GST_STR_NULL (media->key.type));
g_print (" data: '%s'\n", GST_STR_NULL (media->key.data));
if (media->attributes->len > 0) {
guint i;
g_print (" attributes:\n");
for (i = 0; i < media->attributes->len; i++) {
GstSDPAttribute *attr =
&g_array_index (media->attributes, GstSDPAttribute, i);
g_print (" attribute '%s' : '%s'\n", attr->key, attr->value);
}
}
}
/**
* gst_sdp_message_dump:
* @msg: a #GstSDPMessage
*
* Dump the parsed contents of @msg to stdout.
*
* Returns: a #GstSDPResult.
*/
GstSDPResult
gst_sdp_message_dump (const GstSDPMessage * msg)
{
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
g_print ("sdp packet %p:\n", msg);
g_print (" version: '%s'\n", GST_STR_NULL (msg->version));
g_print (" origin:\n");
g_print (" username: '%s'\n", GST_STR_NULL (msg->origin.username));
g_print (" sess_id: '%s'\n", GST_STR_NULL (msg->origin.sess_id));
g_print (" sess_version: '%s'\n", GST_STR_NULL (msg->origin.sess_version));
g_print (" nettype: '%s'\n", GST_STR_NULL (msg->origin.nettype));
g_print (" addrtype: '%s'\n", GST_STR_NULL (msg->origin.addrtype));
g_print (" addr: '%s'\n", GST_STR_NULL (msg->origin.addr));
g_print (" session_name: '%s'\n", GST_STR_NULL (msg->session_name));
g_print (" information: '%s'\n", GST_STR_NULL (msg->information));
g_print (" uri: '%s'\n", GST_STR_NULL (msg->uri));
if (msg->emails->len > 0) {
guint i;
g_print (" emails:\n");
for (i = 0; i < msg->emails->len; i++) {
g_print (" email '%s'\n", g_array_index (msg->emails, gchar *, i));
}
}
if (msg->phones->len > 0) {
guint i;
g_print (" phones:\n");
for (i = 0; i < msg->phones->len; i++) {
g_print (" phone '%s'\n", g_array_index (msg->phones, gchar *, i));
}
}
g_print (" connection:\n");
g_print (" nettype: '%s'\n", GST_STR_NULL (msg->connection.nettype));
g_print (" addrtype: '%s'\n", GST_STR_NULL (msg->connection.addrtype));
g_print (" address: '%s'\n", GST_STR_NULL (msg->connection.address));
g_print (" ttl: '%u'\n", msg->connection.ttl);
g_print (" addr_number: '%u'\n", msg->connection.addr_number);
if (msg->bandwidths->len > 0) {
guint i;
g_print (" bandwidths:\n");
for (i = 0; i < msg->bandwidths->len; i++) {
GstSDPBandwidth *bw =
&g_array_index (msg->bandwidths, GstSDPBandwidth, i);
g_print (" type: '%s'\n", GST_STR_NULL (bw->bwtype));
g_print (" bandwidth: '%u'\n", bw->bandwidth);
}
}
g_print (" key:\n");
g_print (" type: '%s'\n", GST_STR_NULL (msg->key.type));
g_print (" data: '%s'\n", GST_STR_NULL (msg->key.data));
if (msg->attributes->len > 0) {
guint i;
g_print (" attributes:\n");
for (i = 0; i < msg->attributes->len; i++) {
GstSDPAttribute *attr =
&g_array_index (msg->attributes, GstSDPAttribute, i);
g_print (" attribute '%s' : '%s'\n", attr->key, attr->value);
}
}
if (msg->medias->len > 0) {
guint i;
g_print (" medias:\n");
for (i = 0; i < msg->medias->len; i++) {
g_print (" media %u:\n", i);
print_media (&g_array_index (msg->medias, GstSDPMedia, i));
}
}
return GST_SDP_OK;
}
static const gchar *
gst_sdp_get_attribute_for_pt (const GstSDPMedia * media, const gchar * name,
gint pt)
{
guint i;
for (i = 0;; i++) {
const gchar *attr;
gint val;
if ((attr = gst_sdp_media_get_attribute_val_n (media, name, i)) == NULL)
break;
if (sscanf (attr, "%d ", &val) != 1)
continue;
if (val == pt)
return attr;
}
return NULL;
}
/* this may modify the input string (and resets) */
#define PARSE_INT(p, del, res) \
G_STMT_START { \
gchar *t = p; \
p = strstr (p, del); \
if (p == NULL) \
res = -1; \
else { \
char prev = *p; \
*p = '\0'; \
res = atoi (t); \
*p = prev; \
p++; \
} \
} G_STMT_END
/* this may modify the string without reset */
#define PARSE_STRING(p, del, res) \
G_STMT_START { \
gchar *t = p; \
p = strstr (p, del); \
if (p == NULL) { \
res = NULL; \
p = t; \
} \
else { \
*p = '\0'; \
p++; \
res = t; \
} \
} G_STMT_END
#define SKIP_SPACES(p) \
while (*p && g_ascii_isspace (*p)) \
p++;
/* rtpmap contains:
*
* <payload> <encoding_name>/<clock_rate>[/<encoding_params>]
*/
static gboolean
gst_sdp_parse_rtpmap (const gchar * rtpmap, gint * payload, gchar ** name,
gint * rate, gchar ** params)
{
gchar *p, *t, *orig_value;
p = orig_value = g_strdup (rtpmap);
PARSE_INT (p, " ", *payload);
if (*payload == -1)
goto fail;
SKIP_SPACES (p);
if (*p == '\0')
goto fail;
PARSE_STRING (p, "/", *name);
if (*name == NULL) {
GST_DEBUG ("no rate, name %s", p);
/* no rate, assume -1 then, this is not supposed to happen but RealMedia
* streams seem to omit the rate. */
*name = g_strdup (p);
*rate = -1;
*params = NULL;
goto out;
} else {
*name = strdup (*name);
}
t = p;
p = strstr (p, "/");
if (p == NULL) {
*rate = atoi (t);
*params = NULL;
goto out;
}
p++;
*rate = atoi (t);
if (*p == '\0')
*params = NULL;
else
*params = g_strdup (p);
out:
g_free (orig_value);
return TRUE;
fail:
g_free (orig_value);
return FALSE;
}
/**
* gst_sdp_media_add_rtcp_fb_attributes_from_media:
* @media: a #GstSDPMedia
* @pt: payload type
* @caps: a #GstCaps
*
* Parse given @media for "rtcp-fb" attributes and add it to the @caps.
*
* Mapping of caps from SDP fields:
*
* a=rtcp-fb:(payload) (param1) [param2]...
*
* Returns: a #GstSDPResult.
*/
static GstSDPResult
gst_sdp_media_add_rtcp_fb_attributes_from_media (const GstSDPMedia * media,
gint pt, GstCaps * caps)
{
const gchar *rtcp_fb;
gchar *p, *to_free;
gint payload, i;
GstStructure *s;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (caps != NULL && GST_IS_CAPS (caps), GST_SDP_EINVAL);
s = gst_caps_get_structure (caps, 0);
for (i = 0;; i++) {
gboolean all_formats = FALSE;
if ((rtcp_fb = gst_sdp_media_get_attribute_val_n (media,
"rtcp-fb", i)) == NULL)
break;
/* p is now of the format <payload> attr... */
to_free = p = g_strdup (rtcp_fb);
/* check if it applies to all formats */
if (*p == '*') {
p++;
all_formats = TRUE;
} else {
PARSE_INT (p, " ", payload);
}
if (all_formats || (payload != -1 && payload == pt)) {
gchar *tmp, *key;
SKIP_SPACES (p);
/* replace space with '-' */
key = g_strdup_printf ("rtcp-fb-%s", p);
for (tmp = key; (tmp = strchr (tmp, ' ')); ++tmp) {
*tmp = '-';
}
gst_structure_set (s, key, G_TYPE_BOOLEAN, TRUE, NULL);
GST_DEBUG ("adding caps: %s=TRUE", key);
g_free (key);
}
g_free (to_free);
}
return GST_SDP_OK;
}
/**
* gst_sdp_media_get_caps_from_media:
* @media: a #GstSDPMedia
* @pt: a payload type
*
* Mapping of caps from SDP fields:
*
* a=rtpmap:(payload) (encoding_name)/(clock_rate)[/(encoding_params)]
*
* a=framesize:(payload) (width)-(height)
*
* a=fmtp:(payload) (param)[=(value)];...
*
* Returns: a #GstCaps, or %NULL if an error happened
*
* Since: 1.8
*/
GstCaps *
gst_sdp_media_get_caps_from_media (const GstSDPMedia * media, gint pt)
{
GstCaps *caps;
const gchar *rtpmap;
gchar *fmtp = NULL;
gchar *framesize = NULL;
gchar *name = NULL;
gint rate = -1;
gchar *params = NULL;
gchar *tmp;
GstStructure *s;
gint payload = 0;
gboolean ret;
g_return_val_if_fail (media != NULL, NULL);
/* get and parse rtpmap */
rtpmap = gst_sdp_get_attribute_for_pt (media, "rtpmap", pt);
if (rtpmap) {
ret = gst_sdp_parse_rtpmap (rtpmap, &payload, &name, &rate, &params);
if (!ret) {
GST_ERROR ("error parsing rtpmap, ignoring");
rtpmap = NULL;
}
}
/* dynamic payloads need rtpmap or we fail */
if (rtpmap == NULL && pt >= 96)
goto no_rtpmap;
/* check if we have a rate, if not, we need to look up the rate from the
* default rates based on the payload types. */
if (rate == -1) {
const GstRTPPayloadInfo *info;
if (GST_RTP_PAYLOAD_IS_DYNAMIC (pt)) {
/* dynamic types, use media and encoding_name */
tmp = g_ascii_strdown (media->media, -1);
info = gst_rtp_payload_info_for_name (tmp, name);
g_free (tmp);
} else {
/* static types, use payload type */
info = gst_rtp_payload_info_for_pt (pt);
}
if (info) {
if ((rate = info->clock_rate) == 0)
rate = -1;
}
/* we fail if we cannot find one */
if (rate == -1)
goto no_rate;
}
tmp = g_ascii_strdown (media->media, -1);
caps = gst_caps_new_simple ("application/x-unknown",
"media", G_TYPE_STRING, tmp, "payload", G_TYPE_INT, pt, NULL);
g_free (tmp);
s = gst_caps_get_structure (caps, 0);
gst_structure_set (s, "clock-rate", G_TYPE_INT, rate, NULL);
/* encoding name must be upper case */
if (name != NULL) {
tmp = g_ascii_strup (name, -1);
gst_structure_set (s, "encoding-name", G_TYPE_STRING, tmp, NULL);
g_free (tmp);
}
/* params must be lower case */
if (params != NULL) {
tmp = g_ascii_strdown (params, -1);
gst_structure_set (s, "encoding-params", G_TYPE_STRING, tmp, NULL);
g_free (tmp);
}
/* parse optional fmtp: field */
if ((fmtp = g_strdup (gst_sdp_get_attribute_for_pt (media, "fmtp", pt)))) {
gchar *p;
gint payload = 0;
p = fmtp;
/* p is now of the format <payload> <param>[=<value>];... */
PARSE_INT (p, " ", payload);
if (payload != -1 && payload == pt) {
gchar **pairs;
gint i;
/* <param>[=<value>] are separated with ';' */
pairs = g_strsplit (p, ";", 0);
for (i = 0; pairs[i]; i++) {
gchar *valpos;
const gchar *val, *key;
gint j;
const gchar *reserved_keys[] =
{ "media", "payload", "clock-rate", "encoding-name",
"encoding-params"
};
/* the key may not have a '=', the value can have other '='s */
valpos = strstr (pairs[i], "=");
if (valpos) {
/* we have a '=' and thus a value, remove the '=' with \0 */
*valpos = '\0';
/* value is everything between '=' and ';'. We split the pairs at ;
* boundaries so we can take the remainder of the value. Some servers
* put spaces around the value which we strip off here. Alternatively
* we could strip those spaces in the depayloaders should these spaces
* actually carry any meaning in the future. */
val = g_strstrip (valpos + 1);
} else {
/* simple <param>;.. is translated into <param>=1;... */
val = "1";
}
/* strip the key of spaces, convert key to lowercase but not the value. */
key = g_strstrip (pairs[i]);
/* skip keys from the fmtp, which we already use ourselves for the
* caps. Some software is adding random things like clock-rate into
* the fmtp, and we would otherwise here set a string-typed clock-rate
* in the caps... and thus fail to create valid RTP caps
*/
for (j = 0; j < G_N_ELEMENTS (reserved_keys); j++) {
if (g_ascii_strcasecmp (reserved_keys[j], key) == 0) {
key = "";
break;
}
}
if (strlen (key) > 1) {
tmp = g_ascii_strdown (key, -1);
gst_structure_set (s, tmp, G_TYPE_STRING, val, NULL);
g_free (tmp);
}
}
g_strfreev (pairs);
}
}
/* parse framesize: field */
if ((framesize =
g_strdup (gst_sdp_media_get_attribute_val (media, "framesize")))) {
gchar *p;
/* p is now of the format <payload> <width>-<height> */
p = framesize;
PARSE_INT (p, " ", payload);
if (payload != -1 && payload == pt) {
gst_structure_set (s, "a-framesize", G_TYPE_STRING, p, NULL);
}
}
/* parse rtcp-fb: field */
gst_sdp_media_add_rtcp_fb_attributes_from_media (media, pt, caps);
out:
g_free (framesize);
g_free (fmtp);
g_free (name);
g_free (params);
return caps;
/* ERRORS */
no_rtpmap:
{
GST_ERROR ("rtpmap type not given for dynamic payload %d", pt);
caps = NULL;
goto out;
}
no_rate:
{
GST_ERROR ("rate unknown for payload type %d", pt);
caps = NULL;
goto out;
}
}
/**
* gst_sdp_media_set_media_from_caps:
* @caps: a #GstCaps
* @media: a #GstSDPMedia
*
* Mapping of caps to SDP fields:
*
* a=rtpmap:(payload) (encoding_name) or (clock_rate)[or (encoding_params)]
*
* a=framesize:(payload) (width)-(height)
*
* a=fmtp:(payload) (param)[=(value)];...
*
* a=rtcp-fb:(payload) (param1) [param2]...
*
* Returns: a #GstSDPResult.
*
* Since: 1.8
*/
GstSDPResult
gst_sdp_media_set_media_from_caps (const GstCaps * caps, GstSDPMedia * media)
{
const gchar *caps_str, *caps_enc, *caps_params;
gchar *tmp;
gint caps_pt, caps_rate;
guint n_fields, j;
gboolean first, nack, nack_pli, ccm_fir;
GString *fmtp;
GstStructure *s;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (caps != NULL && GST_IS_CAPS (caps), GST_SDP_EINVAL);
s = gst_caps_get_structure (caps, 0);
if (s == NULL) {
GST_ERROR ("ignoring stream without media type");
goto error;
}
/* get media type and payload for the m= line */
caps_str = gst_structure_get_string (s, "media");
gst_sdp_media_set_media (media, caps_str);
gst_structure_get_int (s, "payload", &caps_pt);
tmp = g_strdup_printf ("%d", caps_pt);
gst_sdp_media_add_format (media, tmp);
g_free (tmp);
/* get clock-rate, media type and params for the rtpmap attribute */
gst_structure_get_int (s, "clock-rate", &caps_rate);
caps_enc = gst_structure_get_string (s, "encoding-name");
caps_params = gst_structure_get_string (s, "encoding-params");
if (caps_enc) {
if (caps_params)
tmp = g_strdup_printf ("%d %s/%d/%s", caps_pt, caps_enc, caps_rate,
caps_params);
else
tmp = g_strdup_printf ("%d %s/%d", caps_pt, caps_enc, caps_rate);
gst_sdp_media_add_attribute (media, "rtpmap", tmp);
g_free (tmp);
}
/* get rtcp-fb attributes */
if (gst_structure_get_boolean (s, "rtcp-fb-nack", &nack)) {
if (nack) {
tmp = g_strdup_printf ("%d nack", caps_pt);
gst_sdp_media_add_attribute (media, "rtcp-fb", tmp);
g_free (tmp);
GST_DEBUG ("adding rtcp-fb-nack to pt=%d", caps_pt);
}
}
if (gst_structure_get_boolean (s, "rtcp-fb-nack-pli", &nack_pli)) {
if (nack_pli) {
tmp = g_strdup_printf ("%d nack pli", caps_pt);
gst_sdp_media_add_attribute (media, "rtcp-fb", tmp);
g_free (tmp);
GST_DEBUG ("adding rtcp-fb-nack-pli to pt=%d", caps_pt);
}
}
if (gst_structure_get_boolean (s, "rtcp-fb-ccm-fir", &ccm_fir)) {
if (ccm_fir) {
tmp = g_strdup_printf ("%d ccm fir", caps_pt);
gst_sdp_media_add_attribute (media, "rtcp-fb", tmp);
g_free (tmp);
GST_DEBUG ("adding rtcp-fb-ccm-fir to pt=%d", caps_pt);
}
}
/* collect all other properties and add them to fmtp or attributes */
fmtp = g_string_new ("");
g_string_append_printf (fmtp, "%d ", caps_pt);
first = TRUE;
n_fields = gst_structure_n_fields (s);
for (j = 0; j < n_fields; j++) {
const gchar *fname, *fval;
fname = gst_structure_nth_field_name (s, j);
/* filter out standard properties */
if (!strcmp (fname, "media"))
continue;
if (!strcmp (fname, "payload"))
continue;
if (!strcmp (fname, "clock-rate"))
continue;
if (!strcmp (fname, "encoding-name"))
continue;
if (!strcmp (fname, "encoding-params"))
continue;
if (!strcmp (fname, "ssrc"))
continue;
if (!strcmp (fname, "timestamp-offset"))
continue;
if (!strcmp (fname, "seqnum-offset"))
continue;
if (g_str_has_prefix (fname, "srtp-"))
continue;
if (g_str_has_prefix (fname, "srtcp-"))
continue;
/* handled later */
if (g_str_has_prefix (fname, "x-gst-rtsp-server-rtx-time"))
continue;
if (g_str_has_prefix (fname, "rtcp-fb-"))
continue;
if (!strcmp (fname, "a-framesize")) {
/* a-framesize attribute */
if ((fval = gst_structure_get_string (s, fname))) {
tmp = g_strdup_printf ("%d %s", caps_pt, fval);
gst_sdp_media_add_attribute (media, fname + 2, tmp);
g_free (tmp);
}
continue;
}
if (g_str_has_prefix (fname, "a-")) {
/* attribute */
if ((fval = gst_structure_get_string (s, fname)))
gst_sdp_media_add_attribute (media, fname + 2, fval);
continue;
}
if (g_str_has_prefix (fname, "x-")) {
/* attribute */
if ((fval = gst_structure_get_string (s, fname)))
gst_sdp_media_add_attribute (media, fname, fval);
continue;
}
if ((fval = gst_structure_get_string (s, fname))) {
g_string_append_printf (fmtp, "%s%s=%s", first ? "" : ";", fname, fval);
first = FALSE;
}
}
if (!first) {
tmp = g_string_free (fmtp, FALSE);
gst_sdp_media_add_attribute (media, "fmtp", tmp);
g_free (tmp);
} else {
g_string_free (fmtp, TRUE);
}
return GST_SDP_OK;
/* ERRORS */
error:
{
GST_DEBUG ("ignoring stream");
return GST_SDP_EINVAL;
}
}
/**
* gst_sdp_make_keymgmt:
* @uri: a #gchar URI
* @base64: a #gchar base64-encoded key data
*
* Makes key management data
*
* Returns: (transfer full): a #gchar key-mgmt data,
*
* Since: 1.8
*/
gchar *
gst_sdp_make_keymgmt (const gchar * uri, const gchar * base64)
{
g_return_val_if_fail (uri != NULL, NULL);
g_return_val_if_fail (base64 != NULL, NULL);
return g_strdup_printf ("prot=mikey;uri=\"%s\";data=\"%s\"", uri, base64);
}
static gboolean
gst_sdp_parse_keymgmt (const gchar * keymgmt, GstMIKEYMessage ** mikey)
{
gsize size;
guchar *data;
gchar *orig_value;
gchar *p, *kmpid;
p = orig_value = g_strdup (keymgmt);
SKIP_SPACES (p);
if (*p == '\0') {
g_free (orig_value);
return FALSE;
}
PARSE_STRING (p, " ", kmpid);
if (kmpid == NULL || !g_str_equal (kmpid, "mikey")) {
g_free (orig_value);
return FALSE;
}
data = g_base64_decode (p, &size);
g_free (orig_value); /* Don't need this any more */
if (data == NULL)
return FALSE;
*mikey = gst_mikey_message_new_from_data (data, size, NULL, NULL);
g_free (data);
return (*mikey != NULL);
}
static GstSDPResult
sdp_add_attributes_to_keymgmt (GArray * attributes, GstMIKEYMessage ** mikey)
{
GstSDPResult res = GST_SDP_OK;
if (attributes->len > 0) {
guint i;
for (i = 0; i < attributes->len; i++) {
GstSDPAttribute *attr = &g_array_index (attributes, GstSDPAttribute, i);
if (g_str_equal (attr->key, "key-mgmt")) {
res = gst_sdp_parse_keymgmt (attr->value, mikey);
break;
}
}
}
return res;
}
/**
* gst_sdp_message_parse_keymgmt:
* @msg: a #GstSDPMessage
* @mikey: (out) (transfer full): pointer to new #GstMIKEYMessage
*
* Creates a new #GstMIKEYMessage after parsing the key-mgmt attribute
* from a #GstSDPMessage.
*
* Returns: a #GstSDPResult.
*
* Since: 1.8.1
*/
GstSDPResult
gst_sdp_message_parse_keymgmt (const GstSDPMessage * msg,
GstMIKEYMessage ** mikey)
{
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
return sdp_add_attributes_to_keymgmt (msg->attributes, mikey);
}
/**
* gst_sdp_media_parse_keymgmt:
* @media: a #GstSDPMedia
* @mikey: (out) (transfer full): pointer to new #GstMIKEYMessage
*
* Creates a new #GstMIKEYMessage after parsing the key-mgmt attribute
* from a #GstSDPMedia.
*
* Returns: a #GstSDPResult.
*
* Since: 1.8.1
*/
GstSDPResult
gst_sdp_media_parse_keymgmt (const GstSDPMedia * media,
GstMIKEYMessage ** mikey)
{
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
return sdp_add_attributes_to_keymgmt (media->attributes, mikey);
}
static GstSDPResult
sdp_add_attributes_to_caps (GArray * attributes, GstCaps * caps)
{
if (attributes->len > 0) {
GstStructure *s;
guint i;
s = gst_caps_get_structure (caps, 0);
for (i = 0; i < attributes->len; i++) {
GstSDPAttribute *attr = &g_array_index (attributes, GstSDPAttribute, i);
gchar *tofree, *key;
key = attr->key;
/* skip some of the attribute we already handle */
if (!strcmp (key, "fmtp"))
continue;
if (!strcmp (key, "rtpmap"))
continue;
if (!strcmp (key, "control"))
continue;
if (!strcmp (key, "range"))
continue;
if (!strcmp (key, "framesize"))
continue;
if (!strcmp (key, "key-mgmt"))
continue;
/* string must be valid UTF8 */
if (!g_utf8_validate (attr->value, -1, NULL))
continue;
if (!g_str_has_prefix (key, "x-"))
tofree = key = g_strdup_printf ("a-%s", key);
else
tofree = NULL;
GST_DEBUG ("adding caps: %s=%s", key, attr->value);
gst_structure_set (s, key, G_TYPE_STRING, attr->value, NULL);
g_free (tofree);
}
}
return GST_SDP_OK;
}
/**
* gst_sdp_message_attributes_to_caps:
* @msg: a #GstSDPMessage
* @caps: a #GstCaps
*
* Mapping of attributes of #GstSDPMessage to #GstCaps
*
* Returns: a #GstSDPResult.
*
* Since: 1.8
*/
GstSDPResult
gst_sdp_message_attributes_to_caps (const GstSDPMessage * msg, GstCaps * caps)
{
GstSDPResult res;
GstMIKEYMessage *mikey = NULL;
g_return_val_if_fail (msg != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (caps != NULL && GST_IS_CAPS (caps), GST_SDP_EINVAL);
res = gst_sdp_message_parse_keymgmt (msg, &mikey);
if (mikey) {
if (gst_mikey_message_to_caps (mikey, caps)) {
res = GST_SDP_EINVAL;
goto done;
}
}
res = sdp_add_attributes_to_caps (msg->attributes, caps);
done:
if (mikey)
gst_mikey_message_unref (mikey);
return res;
}
/**
* gst_sdp_media_attributes_to_caps:
* @media: a #GstSDPMedia
* @caps: a #GstCaps
*
* Mapping of attributes of #GstSDPMedia to #GstCaps
*
* Returns: a #GstSDPResult.
*
* Since: 1.8
*/
GstSDPResult
gst_sdp_media_attributes_to_caps (const GstSDPMedia * media, GstCaps * caps)
{
GstSDPResult res;
GstMIKEYMessage *mikey = NULL;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (caps != NULL && GST_IS_CAPS (caps), GST_SDP_EINVAL);
res = gst_sdp_media_parse_keymgmt (media, &mikey);
if (mikey) {
if (!gst_mikey_message_to_caps (mikey, caps)) {
res = GST_SDP_EINVAL;
goto done;
}
}
res = sdp_add_attributes_to_caps (media->attributes, caps);
done:
if (mikey)
gst_mikey_message_unref (mikey);
return res;
}
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