1 files changed, 219 insertions, 0 deletions

diff --git a/toxav/rtp.h b/toxav/rtp.h
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+++ b/toxav/rtp.h
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+/**  toxrtp.h
+ *
+ *   Copyright (C) 2013 Tox project All Rights Reserved.
+ *
+ *   This file is part of Tox.
+ *
+ *   Tox is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Tox 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 General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Tox. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ *   Report bugs/suggestions at #tox-dev @ freenode.net:6667
+ */
+
+#ifndef __TOXRTP
+#define __TOXRTP
+
+#define RTP_VERSION 2
+#include <inttypes.h>
+#include <pthread.h>
+
+#include "../toxcore/util.h"
+#include "../toxcore/network.h"
+#include "../toxcore/net_crypto.h"
+#include "../toxcore/Messenger.h"
+
+#define MAX_SEQU_NUM 65535
+#define MAX_RTP_SIZE 65535
+
+/**
+ * @brief Standard rtp header
+ *
+ */
+
+typedef struct _RTPHeader {
+    uint8_t   flags;             /* Version(2),Padding(1), Ext(1), Cc(4) */
+    uint8_t   marker_payloadt;   /* Marker(1), PlayLoad Type(7) */
+    uint16_t  sequnum;           /* Sequence Number */
+    uint32_t  timestamp;         /* Timestamp */
+    uint32_t  ssrc;              /* SSRC */
+    uint32_t *csrc;              /* CSRC's table */
+    uint32_t  length;            /* Length of the header in payload string. */
+
+} RTPHeader;
+
+
+/**
+ * @brief Standard rtp extension header.
+ *
+ */
+typedef struct _RTPExtHeader {
+    uint16_t  type;          /* Extension profile */
+    uint16_t  length;        /* Number of extensions */
+    uint32_t *table;         /* Extension's table */
+
+} RTPExtHeader;
+
+
+/**
+ * @brief Standard rtp message.
+ *
+ */
+typedef struct _RTPMessage {
+    RTPHeader    *header;
+    RTPExtHeader *ext_header;
+
+    uint8_t       data[MAX_RTP_SIZE];
+    uint32_t      length;
+    IP_Port   from;
+
+    struct _RTPMessage   *next;
+} RTPMessage;
+
+
+/**
+ * @brief Our main session descriptor.
+ *        It measures the session variables and controls
+ *        the entire session. There are functions for manipulating
+ *        the session so tend to use those instead of directly modifying
+ *        session parameters.
+ *
+ */
+typedef struct _RTPSession {
+    uint8_t         version;
+    uint8_t         padding;
+    uint8_t         extension;
+    uint8_t         cc;
+    uint8_t         marker;
+    uint8_t         payload_type;
+    uint16_t        sequnum;   /* Set when sending */
+    uint16_t        rsequnum;  /* Check when recving msg */
+    uint32_t        timestamp;
+    uint32_t        ssrc;
+    uint32_t       *csrc;
+
+    /* If some additional data must be sent via message
+     * apply it here. Only by allocating this member you will be
+     * automatically placing it within a message.
+     */
+    RTPExtHeader   *ext_header;
+
+    /* External header identifiers */
+    int             resolution;
+    int             framerate;
+
+
+    /* Since these are only references of the
+     * call structure don't allocate or free
+     */
+
+    const uint8_t  *encrypt_key;
+    const uint8_t  *decrypt_key;
+    uint8_t        *encrypt_nonce;
+    uint8_t        *decrypt_nonce;
+
+    uint8_t        *nonce_cycle;
+
+    RTPMessage     *oldest_msg;
+    RTPMessage     *last_msg; /* tail */
+
+    /* Msg prefix for core to know when recving */
+    uint8_t         prefix;
+
+    pthread_mutex_t mutex;
+    int             dest;
+
+} RTPSession;
+
+
+/**
+ * @brief Release all messages held by session.
+ *
+ * @param session The session.
+ * @return int
+ * @retval -1 Error occurred.
+ * @retval 0 Success.
+ */
+int rtp_release_session_recv ( RTPSession *session );
+
+
+/**
+ * @brief Get's oldest message in the list.
+ *
+ * @param session Where the list is.
+ * @return RTPMessage* The message. You need to call rtp_msg_free() to free it.
+ * @retval NULL No messages in the list, or no list.
+ */
+RTPMessage *rtp_recv_msg ( RTPSession *session );
+
+
+/**
+ * @brief Sends msg to _RTPSession::dest
+ *
+ * @param session The session.
+ * @param msg The message
+ * @param messenger Tox* object.
+ * @return int
+ * @retval -1 On error.
+ * @retval 0 On success.
+ */
+int rtp_send_msg ( RTPSession *session, Messenger *messenger, const uint8_t *data, uint16_t length );
+
+
+/**
+ * @brief Speaks for it self.
+ *
+ * @param session The control session msg belongs to. It can be NULL.
+ * @param msg The message.
+ * @return void
+ */
+void rtp_free_msg ( RTPSession *session, RTPMessage *msg );
+
+
+/**
+ * @brief Must be called before calling any other rtp function. It's used
+ *        to initialize RTP control session.
+ *
+ * @param payload_type Type of payload used to send. You can use values in toxmsi.h::MSICallType
+ * @param messenger Tox* object.
+ * @param friend_num Friend id.
+ * @param encrypt_key Speaks for it self.
+ * @param decrypt_key Speaks for it self.
+ * @param encrypt_nonce Speaks for it self.
+ * @param decrypt_nonce Speaks for it self.
+ * @return RTPSession* Created control session.
+ * @retval NULL Error occurred.
+ */
+RTPSession *rtp_init_session ( int            payload_type,
+                               Messenger           *messenger,
+                               int            friend_num,
+                               const uint8_t *encrypt_key,
+                               const uint8_t *decrypt_key,
+                               const uint8_t *encrypt_nonce,
+                               const uint8_t *decrypt_nonce );
+
+
+/**
+ * @brief Terminate the session.
+ *
+ * @param session The session.
+ * @param messenger The messenger who owns the session
+ * @return int
+ * @retval -1 Error occurred.
+ * @retval 0 Success.
+ */
+int rtp_terminate_session ( RTPSession *session, Messenger *messenger );
+
+
+
+#endif /* __TOXRTP */