/* 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. */ /* Element-Checklist-Version: 5 */ /** * SECTION:element-rtspreal * @title: rtspreal * * A RealMedia RTSP extension */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #ifdef HAVE_STDINT_H #include <stdint.h> #endif #include <stdlib.h> #include <string.h> #include <gst/rtsp/gstrtspextension.h> #include "realhash.h" #include "rtspreal.h" #include "asmrules.h" GST_DEBUG_CATEGORY_STATIC (rtspreal_debug); #define GST_CAT_DEFAULT (rtspreal_debug) #define SERVER_PREFIX "RealServer" #define DEFAULT_BANDWIDTH "10485800" static GstRTSPResult rtsp_ext_real_get_transports (GstRTSPExtension * ext, GstRTSPLowerTrans protocols, gchar ** transport) { GstRTSPReal *ctx = (GstRTSPReal *) ext; GString *str; if (!ctx->isreal) return GST_RTSP_OK; GST_DEBUG_OBJECT (ext, "generating transports for %d", protocols); str = g_string_new (""); /* if (protocols & GST_RTSP_LOWER_TRANS_UDP_MCAST) { g_string_append (str, "x-real-rdt/mcast;client_port=%%u1;mode=play,"); } if (protocols & GST_RTSP_LOWER_TRANS_UDP) { g_string_append (str, "x-real-rdt/udp;client_port=%%u1;mode=play,"); g_string_append (str, "x-pn-tng/udp;client_port=%%u1;mode=play,"); } */ if (protocols & GST_RTSP_LOWER_TRANS_TCP) { g_string_append (str, "x-real-rdt/tcp;mode=play,"); g_string_append (str, "x-pn-tng/tcp;mode=play,"); } /* if we added something, remove trailing ',' */ if (str->len > 0) g_string_truncate (str, str->len - 1); *transport = g_string_free (str, FALSE); return GST_RTSP_OK; } static GstRTSPResult rtsp_ext_real_before_send (GstRTSPExtension * ext, GstRTSPMessage * request) { GstRTSPReal *ctx = (GstRTSPReal *) ext; switch (request->type_data.request.method) { case GST_RTSP_OPTIONS: { gst_rtsp_message_add_header (request, GST_RTSP_HDR_USER_AGENT, //"RealMedia Player (" GST_PACKAGE_NAME ")"); "RealMedia Player Version 6.0.9.1235 (linux-2.0-libc6-i386-gcc2.95)"); gst_rtsp_message_add_header (request, GST_RTSP_HDR_CLIENT_CHALLENGE, "9e26d33f2984236010ef6253fb1887f7"); gst_rtsp_message_add_header (request, GST_RTSP_HDR_COMPANY_ID, "KnKV4M4I/B2FjJ1TToLycw=="); gst_rtsp_message_add_header (request, GST_RTSP_HDR_GUID, "00000000-0000-0000-0000-000000000000"); gst_rtsp_message_add_header (request, GST_RTSP_HDR_REGION_DATA, "0"); gst_rtsp_message_add_header (request, GST_RTSP_HDR_PLAYER_START_TIME, "[28/03/2003:22:50:23 00:00]"); gst_rtsp_message_add_header (request, GST_RTSP_HDR_CLIENT_ID, "Linux_2.4_6.0.9.1235_play32_RN01_EN_586"); ctx->isreal = FALSE; break; } case GST_RTSP_DESCRIBE: { if (ctx->isreal) { gst_rtsp_message_add_header (request, GST_RTSP_HDR_BANDWIDTH, DEFAULT_BANDWIDTH); gst_rtsp_message_add_header (request, GST_RTSP_HDR_GUID, "00000000-0000-0000-0000-000000000000"); gst_rtsp_message_add_header (request, GST_RTSP_HDR_REGION_DATA, "0"); gst_rtsp_message_add_header (request, GST_RTSP_HDR_CLIENT_ID, "Linux_2.4_6.0.9.1235_play32_RN01_EN_586"); gst_rtsp_message_add_header (request, GST_RTSP_HDR_MAX_ASM_WIDTH, "1"); gst_rtsp_message_add_header (request, GST_RTSP_HDR_LANGUAGE, "en-US"); gst_rtsp_message_add_header (request, GST_RTSP_HDR_REQUIRE, "com.real.retain-entity-for-setup"); } break; } case GST_RTSP_SETUP: { if (ctx->isreal) { gchar *value = g_strdup_printf ("%s, sd=%s", ctx->challenge2, ctx->checksum); gst_rtsp_message_add_header (request, GST_RTSP_HDR_REAL_CHALLENGE2, value); gst_rtsp_message_add_header (request, GST_RTSP_HDR_IF_MATCH, ctx->etag); g_free (value); } break; } default: break; } return GST_RTSP_OK; } static GstRTSPResult rtsp_ext_real_after_send (GstRTSPExtension * ext, GstRTSPMessage * req, GstRTSPMessage * resp) { GstRTSPReal *ctx = (GstRTSPReal *) ext; switch (req->type_data.request.method) { case GST_RTSP_OPTIONS: { gchar *challenge1 = NULL; gchar *server = NULL; gst_rtsp_message_get_header (resp, GST_RTSP_HDR_SERVER, &server, 0); gst_rtsp_message_get_header (resp, GST_RTSP_HDR_REAL_CHALLENGE1, &challenge1, 0); if (!challenge1) goto no_challenge1; gst_rtsp_ext_real_calc_response_and_checksum (ctx->challenge2, ctx->checksum, challenge1); GST_DEBUG_OBJECT (ctx, "Found Real challenge tag"); ctx->isreal = TRUE; break; } case GST_RTSP_DESCRIBE: { gchar *etag = NULL; guint len; gst_rtsp_message_get_header (resp, GST_RTSP_HDR_ETAG, &etag, 0); if (etag) { len = sizeof (ctx->etag); strncpy (ctx->etag, etag, len); ctx->etag[len - 1] = '\0'; } break; } default: break; } return GST_RTSP_OK; /* ERRORS */ no_challenge1: { GST_DEBUG_OBJECT (ctx, "Could not find challenge tag."); ctx->isreal = FALSE; return GST_RTSP_OK; } } #define ENSURE_SIZE(size) \ G_STMT_START { \ while (data_len < size) { \ data_len += 1024; \ data = g_realloc (data, data_len); \ } \ } G_STMT_END #define READ_BUFFER_GEN(src, func, name, dest, dest_len) \ G_STMT_START { \ dest = (gchar *)func (src, name); \ dest_len = 0; \ if (!dest) { \ dest = (char *) ""; \ } \ else if (!strncmp (dest, "buffer;\"", 8)) { \ dest += 8; \ dest_len = strlen (dest) - 1; \ dest[dest_len] = '\0'; \ g_base64_decode_inplace (dest, &dest_len); \ } \ } G_STMT_END #define READ_BUFFER(sdp, name, dest, dest_len) \ READ_BUFFER_GEN(sdp, gst_sdp_message_get_attribute_val, name, dest, dest_len) #define READ_BUFFER_M(media, name, dest, dest_len) \ READ_BUFFER_GEN(media, gst_sdp_media_get_attribute_val, name, dest, dest_len) #define READ_INT_GEN(src, func, name, dest) \ G_STMT_START { \ const gchar *val = func (src, name); \ if (val && !strncmp (val, "integer;", 8)) \ dest = atoi (val + 8); \ else \ dest = 0; \ } G_STMT_END #define READ_INT(sdp, name, dest) \ READ_INT_GEN(sdp, gst_sdp_message_get_attribute_val, name, dest) #define READ_INT_M(media, name, dest) \ READ_INT_GEN(media, gst_sdp_media_get_attribute_val, name, dest) #define READ_STRING(media, name, dest, dest_len) \ G_STMT_START { \ const gchar *val = gst_sdp_media_get_attribute_val (media, name); \ if (val && !strncmp (val, "string;\"", 8)) { \ dest = (gchar *) val + 8; \ dest_len = strlen (dest) - 1; \ dest[dest_len] = '\0'; \ } else { \ dest = (char *) ""; \ dest_len = 0; \ } \ } G_STMT_END #define WRITE_STRING1(datap, str, str_len) \ G_STMT_START { \ *datap = str_len; \ memcpy ((datap) + 1, str, str_len); \ datap += str_len + 1; \ } G_STMT_END #define WRITE_STRING2(datap, str, str_len) \ G_STMT_START { \ GST_WRITE_UINT16_BE (datap, str_len); \ memcpy (datap + 2, str, str_len); \ datap += str_len + 2; \ } G_STMT_END static GstRTSPResult rtsp_ext_real_parse_sdp (GstRTSPExtension * ext, GstSDPMessage * sdp, GstStructure * props) { GstRTSPReal *ctx = (GstRTSPReal *) ext; guint size; gint i; gchar *title, *author, *copyright, *comment; gsize title_len, author_len, copyright_len, comment_len; guint8 *data = NULL, *datap; guint data_len = 0, offset; GstBuffer *buf; gchar *opaque_data; gsize opaque_data_len, asm_rule_book_len; GHashTable *vars; GString *rules; /* don't bother for non-real formats */ READ_INT (sdp, "IsRealDataType", ctx->isreal); if (!ctx->isreal) return TRUE; /* Force PAUSE | PLAY */ //src->methods |= GST_RTSP_PLAY | GST_RTSP_PAUSE; ctx->n_streams = gst_sdp_message_medias_len (sdp); ctx->max_bit_rate = 0; ctx->avg_bit_rate = 0; ctx->max_packet_size = 0; ctx->avg_packet_size = 0; ctx->duration = 0; for (i = 0; i < ctx->n_streams; i++) { const GstSDPMedia *media; gint intval; media = gst_sdp_message_get_media (sdp, i); READ_INT_M (media, "MaxBitRate", intval); ctx->max_bit_rate += intval; READ_INT_M (media, "AvgBitRate", intval); ctx->avg_bit_rate += intval; READ_INT_M (media, "MaxPacketSize", intval); ctx->max_packet_size = MAX (ctx->max_packet_size, intval); READ_INT_M (media, "AvgPacketSize", intval); ctx->avg_packet_size = (ctx->avg_packet_size * i + intval) / (i + 1); READ_INT_M (media, "Duration", intval); ctx->duration = MAX (ctx->duration, intval); } /* FIXME: use GstByteWriter to write the header */ /* PROP */ offset = 0; size = 50; ENSURE_SIZE (size); datap = data + offset; memcpy (datap + 0, "PROP", 4); GST_WRITE_UINT32_BE (datap + 4, size); GST_WRITE_UINT16_BE (datap + 8, 0); GST_WRITE_UINT32_BE (datap + 10, ctx->max_bit_rate); GST_WRITE_UINT32_BE (datap + 14, ctx->avg_bit_rate); GST_WRITE_UINT32_BE (datap + 18, ctx->max_packet_size); GST_WRITE_UINT32_BE (datap + 22, ctx->avg_packet_size); GST_WRITE_UINT32_BE (datap + 26, 0); GST_WRITE_UINT32_BE (datap + 30, ctx->duration); GST_WRITE_UINT32_BE (datap + 34, 0); GST_WRITE_UINT32_BE (datap + 38, 0); GST_WRITE_UINT32_BE (datap + 42, 0); GST_WRITE_UINT16_BE (datap + 46, ctx->n_streams); GST_WRITE_UINT16_BE (datap + 48, 0); offset += size; /* CONT */ READ_BUFFER (sdp, "Title", title, title_len); READ_BUFFER (sdp, "Author", author, author_len); READ_BUFFER (sdp, "Comment", comment, comment_len); READ_BUFFER (sdp, "Copyright", copyright, copyright_len); size = 18 + title_len + author_len + comment_len + copyright_len; ENSURE_SIZE (offset + size); datap = data + offset; memcpy (datap, "CONT", 4); GST_WRITE_UINT32_BE (datap + 4, size); GST_WRITE_UINT16_BE (datap + 8, 0); /* Version */ datap += 10; WRITE_STRING2 (datap, title, title_len); WRITE_STRING2 (datap, author, author_len); WRITE_STRING2 (datap, copyright, copyright_len); WRITE_STRING2 (datap, comment, comment_len); offset += size; /* fix the hashtale for the rule parser */ rules = g_string_new (""); vars = g_hash_table_new (g_str_hash, g_str_equal); g_hash_table_insert (vars, (gchar *) "Bandwidth", (gchar *) DEFAULT_BANDWIDTH); /* MDPR */ for (i = 0; i < ctx->n_streams; i++) { const GstSDPMedia *media; guint32 len; GstRTSPRealStream *stream; gchar *str; gint rulematches[MAX_RULEMATCHES]; gint sel, j, n; media = gst_sdp_message_get_media (sdp, i); if (media->media && !strcmp (media->media, "data")) continue; stream = g_new0 (GstRTSPRealStream, 1); ctx->streams = g_list_append (ctx->streams, stream); READ_INT_M (media, "MaxBitRate", stream->max_bit_rate); READ_INT_M (media, "AvgBitRate", stream->avg_bit_rate); READ_INT_M (media, "MaxPacketSize", stream->max_packet_size); READ_INT_M (media, "AvgPacketSize", stream->avg_packet_size); READ_INT_M (media, "StartTime", stream->start_time); READ_INT_M (media, "Preroll", stream->preroll); READ_INT_M (media, "Duration", stream->duration); READ_STRING (media, "StreamName", str, stream->stream_name_len); stream->stream_name = g_strndup (str, stream->stream_name_len); READ_STRING (media, "mimetype", str, stream->mime_type_len); stream->mime_type = g_strndup (str, stream->mime_type_len); /* FIXME: Depending on the current bandwidth, we need to select one * bandwidth out of a list offered by the server. Someone needs to write * a parser for strings like * * #($Bandwidth < 67959),TimestampDelivery=T,DropByN=T,priority=9; * #($Bandwidth >= 67959) && ($Bandwidth < 167959),AverageBandwidth=67959, * Priority=9;#($Bandwidth >= 67959) && ($Bandwidth < 167959), * AverageBandwidth=0,Priority=5,OnDepend=\"1\"; * #($Bandwidth >= 167959) && ($Bandwidth < 267959), * AverageBandwidth=167959,Priority=9; * #($Bandwidth >= 167959) && ($Bandwidth < 267959),AverageBandwidth=0, * Priority=5,OnDepend=\"3\";#($Bandwidth >= 267959), * AverageBandwidth=267959,Priority=9;#($Bandwidth >= 267959), * AverageBandwidth=0,Priority=5,OnDepend=\"5\"; * * As I don't know how to do that, I just use the first entry (sel = 0). * But to give you a starting point, I offer you above string * in the variable 'asm_rule_book'. */ READ_STRING (media, "ASMRuleBook", str, asm_rule_book_len); stream->rulebook = gst_asm_rule_book_new (str); n = gst_asm_rule_book_match (stream->rulebook, vars, rulematches); for (j = 0; j < n; j++) { g_string_append_printf (rules, "stream=%u;rule=%u,", i, rulematches[j]); } /* get the MLTI for the first matched rules */ sel = rulematches[0]; READ_BUFFER_M (media, "OpaqueData", opaque_data, opaque_data_len); if (opaque_data_len < 4) { GST_DEBUG_OBJECT (ctx, "opaque_data_len %" G_GSIZE_FORMAT " < 4", opaque_data_len); goto strange_opaque_data; } if (strncmp (opaque_data, "MLTI", 4)) { GST_DEBUG_OBJECT (ctx, "no MLTI found, appending all"); stream->type_specific_data_len = opaque_data_len; stream->type_specific_data = g_memdup2 (opaque_data, opaque_data_len); goto no_type_specific; } opaque_data += 4; opaque_data_len -= 4; if (opaque_data_len < 2) { GST_DEBUG_OBJECT (ctx, "opaque_data_len %" G_GSIZE_FORMAT " < 2", opaque_data_len); goto strange_opaque_data; } stream->num_rules = GST_READ_UINT16_BE (opaque_data); opaque_data += 2; opaque_data_len -= 2; if (sel >= stream->num_rules) { GST_DEBUG_OBJECT (ctx, "sel %d >= num_rules %d", sel, stream->num_rules); goto strange_opaque_data; } if (opaque_data_len < 2 * sel) { GST_DEBUG_OBJECT (ctx, "opaque_data_len %" G_GSIZE_FORMAT " < 2 * sel (%d)", opaque_data_len, 2 * sel); goto strange_opaque_data; } opaque_data += 2 * sel; opaque_data_len -= 2 * sel; if (opaque_data_len < 2) { GST_DEBUG_OBJECT (ctx, "opaque_data_len %" G_GSIZE_FORMAT " < 2", opaque_data_len); goto strange_opaque_data; } stream->codec = GST_READ_UINT16_BE (opaque_data); opaque_data += 2; opaque_data_len -= 2; if (opaque_data_len < 2 * (stream->num_rules - sel - 1)) { GST_DEBUG_OBJECT (ctx, "opaque_data_len %" G_GSIZE_FORMAT " < %d", opaque_data_len, 2 * (stream->num_rules - sel - 1)); goto strange_opaque_data; } opaque_data += 2 * (stream->num_rules - sel - 1); opaque_data_len -= 2 * (stream->num_rules - sel - 1); if (opaque_data_len < 2) { GST_DEBUG_OBJECT (ctx, "opaque_data_len %" G_GSIZE_FORMAT " < 2", opaque_data_len); goto strange_opaque_data; } stream->num_rules = GST_READ_UINT16_BE (opaque_data); opaque_data += 2; opaque_data_len -= 2; if (stream->codec > stream->num_rules) { GST_DEBUG_OBJECT (ctx, "codec %d > num_rules %d", stream->codec, stream->num_rules); goto strange_opaque_data; } for (j = 0; j < stream->codec; j++) { if (opaque_data_len < 4) { GST_DEBUG_OBJECT (ctx, "opaque_data_len %" G_GSIZE_FORMAT " < 4", opaque_data_len); goto strange_opaque_data; } len = GST_READ_UINT32_BE (opaque_data); opaque_data += 4; opaque_data_len -= 4; if (opaque_data_len < len) { GST_DEBUG_OBJECT (ctx, "opaque_data_len %" G_GSIZE_FORMAT " < len %d", opaque_data_len, len); goto strange_opaque_data; } opaque_data += len; opaque_data_len -= len; } if (opaque_data_len < 4) { GST_DEBUG_OBJECT (ctx, "opaque_data_len %" G_GSIZE_FORMAT " < 4", opaque_data_len); goto strange_opaque_data; } stream->type_specific_data_len = GST_READ_UINT32_BE (opaque_data); opaque_data += 4; opaque_data_len -= 4; if (opaque_data_len < stream->type_specific_data_len) { GST_DEBUG_OBJECT (ctx, "opaque_data_len %" G_GSIZE_FORMAT " < %d", opaque_data_len, stream->type_specific_data_len); goto strange_opaque_data; } stream->type_specific_data = g_memdup2 (opaque_data, stream->type_specific_data_len); no_type_specific: size = 46 + stream->stream_name_len + stream->mime_type_len + stream->type_specific_data_len; ENSURE_SIZE (offset + size); datap = data + offset; memcpy (datap, "MDPR", 4); GST_WRITE_UINT32_BE (datap + 4, size); GST_WRITE_UINT16_BE (datap + 8, 0); GST_WRITE_UINT16_BE (datap + 10, i); GST_WRITE_UINT32_BE (datap + 12, stream->max_bit_rate); GST_WRITE_UINT32_BE (datap + 16, stream->avg_bit_rate); GST_WRITE_UINT32_BE (datap + 20, stream->max_packet_size); GST_WRITE_UINT32_BE (datap + 24, stream->avg_packet_size); GST_WRITE_UINT32_BE (datap + 28, stream->start_time); GST_WRITE_UINT32_BE (datap + 32, stream->preroll); GST_WRITE_UINT32_BE (datap + 36, stream->duration); datap += 40; WRITE_STRING1 (datap, stream->stream_name, stream->stream_name_len); WRITE_STRING1 (datap, stream->mime_type, stream->mime_type_len); GST_WRITE_UINT32_BE (datap, stream->type_specific_data_len); if (stream->type_specific_data_len) memcpy (datap + 4, stream->type_specific_data, stream->type_specific_data_len); offset += size; } /* destroy the rulebook hashtable now */ g_hash_table_destroy (vars); /* strip final , if we added some stream rules */ if (rules->len > 0) { rules = g_string_truncate (rules, rules->len - 1); } /* and store rules in the context */ ctx->rules = g_string_free (rules, FALSE); /* DATA */ size = 18; ENSURE_SIZE (offset + size); datap = data + offset; memcpy (datap, "DATA", 4); GST_WRITE_UINT32_BE (datap + 4, size); GST_WRITE_UINT16_BE (datap + 8, 0); GST_WRITE_UINT32_BE (datap + 10, 0); /* number of packets */ GST_WRITE_UINT32_BE (datap + 14, 0); /* next data header */ offset += size; buf = gst_buffer_new_wrapped (data, offset); /* Set on caps */ GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_HEADER); gst_structure_set (props, "config", GST_TYPE_BUFFER, buf, NULL); gst_buffer_unref (buf); /* Overwrite encoding and media fields */ gst_structure_set (props, "encoding-name", G_TYPE_STRING, "X-REAL-RDT", NULL); gst_structure_set (props, "media", G_TYPE_STRING, "application", NULL); return TRUE; /* ERRORS */ strange_opaque_data: { g_string_free (rules, TRUE); g_hash_table_destroy (vars); g_free (data); GST_ELEMENT_ERROR (ctx, RESOURCE, WRITE, ("Strange opaque data."), (NULL)); return FALSE; } } static GstRTSPResult rtsp_ext_real_stream_select (GstRTSPExtension * ext, GstRTSPUrl * url) { GstRTSPReal *ctx = (GstRTSPReal *) ext; GstRTSPResult res; GstRTSPMessage request = { 0 }; GstRTSPMessage response = { 0 }; gchar *req_url; if (!ctx->isreal) return GST_RTSP_OK; if (!ctx->rules) return GST_RTSP_OK; req_url = gst_rtsp_url_get_request_uri (url); /* create SET_PARAMETER */ if ((res = gst_rtsp_message_init_request (&request, GST_RTSP_SET_PARAMETER, req_url)) < 0) goto create_request_failed; g_free (req_url); gst_rtsp_message_add_header (&request, GST_RTSP_HDR_SUBSCRIBE, ctx->rules); /* send SET_PARAMETER */ if ((res = gst_rtsp_extension_send (ext, &request, &response)) < 0) goto send_error; gst_rtsp_message_unset (&request); gst_rtsp_message_unset (&response); return GST_RTSP_OK; /* ERRORS */ create_request_failed: { GST_ELEMENT_ERROR (ctx, LIBRARY, INIT, ("Could not create request."), (NULL)); g_free (req_url); goto reset; } send_error: { GST_ELEMENT_ERROR (ctx, RESOURCE, WRITE, ("Could not send message."), (NULL)); goto reset; } reset: { gst_rtsp_message_unset (&request); gst_rtsp_message_unset (&response); return res; } } static void gst_rtsp_real_extension_init (gpointer g_iface, gpointer iface_data); static void gst_rtsp_real_finalize (GObject * obj); #define gst_rtsp_real_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstRTSPReal, gst_rtsp_real, GST_TYPE_ELEMENT, G_IMPLEMENT_INTERFACE (GST_TYPE_RTSP_EXTENSION, gst_rtsp_real_extension_init)); GST_ELEMENT_REGISTER_DEFINE (rtspreal, "rtspreal", GST_RANK_MARGINAL, GST_TYPE_RTSP_REAL); static void gst_rtsp_real_class_init (GstRTSPRealClass * g_class) { GObjectClass *gobject_class = (GObjectClass *) g_class; GstElementClass *gstelement_class = (GstElementClass *) g_class; gobject_class->finalize = gst_rtsp_real_finalize; gst_element_class_set_static_metadata (gstelement_class, "RealMedia RTSP Extension", "Network/Extension/Protocol", "Extends RTSP so that it can handle RealMedia setup", "Wim Taymans <wim.taymans@gmail.com>"); GST_DEBUG_CATEGORY_INIT (rtspreal_debug, "rtspreal", 0, "RealMedia RTSP extension"); } static void gst_rtsp_real_init (GstRTSPReal * rtspreal) { rtspreal->isreal = FALSE; } static void gst_rtsp_stream_free (GstRTSPRealStream * stream) { g_free (stream->stream_name); g_free (stream->mime_type); gst_asm_rule_book_free (stream->rulebook); g_free (stream->type_specific_data); g_free (stream); } static void gst_rtsp_real_finalize (GObject * obj) { GstRTSPReal *r = (GstRTSPReal *) obj; g_list_foreach (r->streams, (GFunc) gst_rtsp_stream_free, NULL); g_list_free (r->streams); g_free (r->rules); G_OBJECT_CLASS (parent_class)->finalize (obj); } static void gst_rtsp_real_extension_init (gpointer g_iface, gpointer iface_data) { GstRTSPExtensionInterface *iface = (GstRTSPExtensionInterface *) g_iface; iface->before_send = rtsp_ext_real_before_send; iface->after_send = rtsp_ext_real_after_send; iface->parse_sdp = rtsp_ext_real_parse_sdp; iface->stream_select = rtsp_ext_real_stream_select; iface->get_transports = rtsp_ext_real_get_transports; }