tox A/V: integration of A/V code into tox

Also-by: Sergey 'Jin' Bostandzhyan <jin@mediatomb.cc>

14 files changed, 748 insertions, 20 deletions

diff --git a/.travis.yml b/.travis.yml
index 06f1e4fb..a3710f0c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,6 +19,31 @@ before_script:
   - ./configure && make -j3
   - sudo make install
   - cd ..
+# installing libopus, needed for audio encoding/decoding
+  - wget http://downloads.xiph.org/releases/opus/opus-1.0.3.tar.gz
+  - tar xzvf opus-1.0.3.tar.gz
+  - cd opus-1.0.3
+  - ./configure && make -j3
+  - sudo make install
+  - cd ..
+# installing libsdl1.2, needed for displaying video frames
+  - wget http://www.libsdl.org/release/SDL-1.2.15.tar.gz
+  - tar -xvzf SDL-1.2.15.tar.gz
+  - cd SDL-1.2.15
+  - ./configure && make -j3
+  - sudo make install
+  - cd ..
+# installing libopenal, needed for audio capture/playback
+  - sudo apt-get install libopenal-dev
+# installing yasm, needed for compiling ffmpeg
+  - sudo apt-get install yasm
+# installing ffmpeg, needed for capturing and encoding/decoding video
+  - wget https://www.ffmpeg.org/releases/ffmpeg-2.0.2.tar.gz
+  - tar -xvzf ffmpeg-2.0.2.tar.gz
+  - cd ffmpeg-2.0.2
+  - ./configure && make -j3
+  - sudo make install
+  - cd ..
 # creating librarys' links and updating cache
   - sudo ldconfig
 # installing check, needed for unit tests
diff --git a/Makefile.am b/Makefile.am
index ac24c6b7..9c44ea96 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -10,7 +10,7 @@ CLEANFILES = $(top_builddir)/libtoxcore.pc
 
 
 EXTRA_DIST = \
-        $(top_srcdir)/libtoxcore.pc.in \
+        libtoxcore.pc.in \
         $(top_srcdir)/docs/updates/Crypto.md \
         $(top_srcdir)/docs/updates/Spam-Prevention.md \
         $(top_srcdir)/docs/updates/Symmetric-NAT-Transversal.md \
diff --git a/build/Makefile.am b/build/Makefile.am
index 631ec111..9530e1a7 100644
--- a/build/Makefile.am
+++ b/build/Makefile.am
@@ -1,9 +1,12 @@
 bin_PROGRAMS =
 noinst_PROGRAMS =
+lib_LTLIBRARIES =
 noinst_bindir = $(top_builddir)/build
 EXTRA_DIST=
 
 include ../toxcore/Makefile.inc
+include ../toxrtp/Makefile.inc
+include ../toxmsi/Makefile.inc
 include ../other/Makefile.inc
 include ../testing/Makefile.inc
 include ../other/bootstrap_serverdaemon/Makefile.inc
diff --git a/configure.ac b/configure.ac
index 81f15eca..dba051c7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -10,7 +10,11 @@ AM_INIT_AUTOMAKE([1.10 -Wall subdir-objects])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 AC_CONFIG_MACRO_DIR([m4])
 
+EXTRA_LT_LDFLAGS=
+
 LIBTOXCORE_LT_VERSION=0:0:0
+LIBTOXMSI_LT_VERSION=0:0:0
+LIBTOXRTP_LT_VERSION=0:0:0
 dnl
 dnl            current:revision:age
 dnl
@@ -19,7 +23,13 @@ dnl revision: increment if source code has changed, set to zero if current is
 dnl           incremented
 dnl age:      increment if interfaces have been added, set to zero if
 dnl           interfaces have been removed or changed
-EXTRA_LT_LDFLAGS="-version-info $LIBTOXCORE_LT_VERSION"
+TOXCORE_LT_LDFLAGS="-version-info $LIBTOXCORE_LT_VERSION"
+TOXMSI_LT_LDFLAGS="-version-info $LIBTOXMSI_LT_VERSION"
+TOXRTP_LT_LDFLAGS="-version-info $LIBTOXMSI_LT_VERSION"
+
+AC_SUBST(TOXCORE_LT_LDFLAGS)
+AC_SUBST(TOXMSI_LT_LDFLAGS)
+AC_SUBST(TOXRTP_LT_LDFLAGS)
 
 if test "x${prefix}" = "xNONE"; then
     prefix="${ac_default_prefix}"
@@ -28,6 +38,7 @@ fi
 BUILD_DHT_BOOTSTRAP_DAEMON="yes"
 BUILD_NTOX="yes"
 BUILD_TESTS="yes"
+BUILD_AV="yes"
 BUILD_TESTING="yes"
 
 NCURSES_FOUND="no"
@@ -46,6 +57,19 @@ AC_ARG_ENABLE([nacl],
     ]
 )
 
+PKG_PROG_PKG_CONFIG
+
+AC_ARG_ENABLE([av],
+    [AC_HELP_STRING([--disable-av], [build AV support libraries (default: auto)]) ],
+    [
+        if test "x$enableval" = "xno"; then
+            BUILD_AV="no"
+        elif test "x$enableval" = "xyes"; then
+            BUILD_AV="yes"
+        fi
+    ]
+)
+
 AC_ARG_ENABLE([tests],
     [AC_HELP_STRING([--disable-tests], [build unit tests (default: auto)]) ],
     [
@@ -314,8 +338,95 @@ AC_TYPE_UINT8_T
 AC_FUNC_FORK
 AC_CHECK_FUNCS([gettimeofday memset socket strchr malloc])
 
-# pkg-config based tests
-PKG_PROG_PKG_CONFIG
+if test "x$BUILD_AV" = "xyes"; then
+    AX_PTHREAD(
+        [],
+        [
+            AC_MSG_WARN([disabling AV support: required pthread library not found])
+            BUILD_AV="no"
+        ]
+    )
+fi
+
+if test "x$BUILD_AV" = "xyes"; then
+    PKG_CHECK_MODULES([AVFORMAT], [libavformat],
+        [],
+        [
+            AC_MSG_WARN([disabling AV support $AVFORMAT_PKG_ERRORS])
+            BUILD_AV="no"
+        ]
+    )
+fi
+
+if test "x$BUILD_AV" = "xyes"; then
+    PKG_CHECK_MODULES([AVCODEC], [libavcodec],
+        [],
+        [
+            AC_MSG_WARN([disabling AV support $AVCODEC_PKG_ERRORS])
+            BUILD_AV="no"
+        ]
+    )
+fi
+
+if test "x$BUILD_AV" = "xyes"; then
+    PKG_CHECK_MODULES([AVUTIL], [libavutil],
+        [],
+        [
+            AC_MSG_WARN([disabling AV support $AVUTIL_PKG_ERRORS])
+            BUILD_AV="no"
+        ]
+    )
+fi
+
+if test "x$BUILD_AV" = "xyes"; then
+    PKG_CHECK_MODULES([AVDEVICE], [libavdevice],
+        [],
+        [
+            AC_MSG_WARN([disabling AV support $AVDEVICE_PKG_ERRORS])
+            BUILD_AV="no"
+        ]
+    )
+fi
+
+if test "x$BUILD_AV" = "xyes"; then
+    PKG_CHECK_MODULES([SWSCALE], [libswscale],
+        [],
+        [
+            AC_MSG_WARN([disabling AV support $SWSCALE_PKG_ERRORS])
+            BUILD_AV="no"
+        ]
+    )
+fi
+
+if test "x$BUILD_AV" = "xyes"; then
+    PKG_CHECK_MODULES([SDL], [sdl],
+        [],
+        [
+            AC_MSG_WARN([disabling AV support $SDL_PKG_ERRORS])
+            BUILD_AV="no"
+        ]
+    )
+fi
+
+if test "x$BUILD_AV" = "xyes"; then
+    PKG_CHECK_MODULES([OPENAL], [openal],
+        [],
+        [
+            AC_MSG_WARN([disabling AV support $OPENAL_PKG_ERRORS])
+            BUILD_AV="no"
+        ]
+    )
+fi
+
+if test "x$BUILD_AV" = "xyes"; then
+    PKG_CHECK_MODULES([OPUS], [opus],
+        [],
+        [
+            AC_MSG_WARN([disabling AV support $OPUS_PKG_ERRORS])
+            BUILD_AV="no"
+        ]
+    )
+fi
 
 if test -n "$PKG_CONFIG"; then
     if test "x$BUILD_TESTS" = "xyes"; then
@@ -351,7 +462,7 @@ if test -n "$PKG_CONFIG"; then
             ])
     fi
 else
-    AC_MSG_WARN([pkg-config was not found on your system])
+    AC_MSG_WARN([pkg-config was not found on your system, will search for libraries manually])
 fi
 
 if (test "x$BUILD_NTOX" = "xyes") && (test "x$NCURSES_FOUND" != "xyes"); then
@@ -474,6 +585,7 @@ fi
 AM_CONDITIONAL(BUILD_DHT_BOOTSTRAP_DAEMON, test "x$BUILD_DHT_BOOTSTRAP_DAEMON" = "xyes")
 AM_CONDITIONAL(BUILD_TESTS, test "x$BUILD_TESTS" = "xyes")
 AM_CONDITIONAL(BUILD_NTOX, test "x$BUILD_NTOX" = "xyes")
+AM_CONDITIONAL(BUILD_AV, test "x$BUILD_AV" = "xyes")
 AM_CONDITIONAL(BUILD_TESTING, test "x$BUILD_TESTING" = "xyes")
 
 AC_CONFIG_FILES([Makefile
diff --git a/docs/av_api.md b/docs/av_api.md
new file mode 100644
index 00000000..08e05a6d
--- /dev/null
+++ b/docs/av_api.md
@@ -0,0 +1,156 @@
+A/V API reference
+
+Take toxmsi/phone.c as a reference
+
+Initialization:
+
+phone_t* initPhone(uint16_t _listen_port, uint16_t _send_port);
+function initializes sample phone. _listen_port and _send_port are variables only meant
+for local testing. You will not have to do anything regarding to that since
+everything will be started within a mesenger.
+
+
+Phone requires one msi session and two rtp sessions ( one for audio and one for
+video ). 
+
+msi_session_t* msi_init_session( void* _core_handler, const uint8_t* _user_agent );
+
+initializes msi session.
+Params:
+void* _core_handler - pointer to an object handling networking,
+const uint8_t* _user_agent - string describing phone client version.
+
+Return value:
+msi_session_t* - pointer to a newly created msi session handler.
+
+msi_session_t reference:
+
+How to handle msi session:
+Controling is done via callbacks and action handlers.
+First register callbacks for every state/action received and make sure
+NOT TO PLACE SOMETHING LIKE LOOPS THAT TAKES A LOT OF TIME TO EXECUTE; every callback is being called 
+directly from event loop. You can find examples in phone.c.
+
+Register callbacks: 
+void msi_register_callback_call_started ( MCALLBACK );
+void msi_register_callback_call_canceled ( MCALLBACK );
+void msi_register_callback_call_rejected ( MCALLBACK );
+void msi_register_callback_call_ended ( MCALLBACK );
+
+void msi_register_callback_recv_invite ( MCALLBACK );
+void msi_register_callback_recv_ringing ( MCALLBACK );
+void msi_register_callback_recv_starting ( MCALLBACK );
+void msi_register_callback_recv_ending ( MCALLBACK );
+void msi_register_callback_recv_error ( MCALLBACK );
+
+void msi_register_callback_requ_timeout ( MCALLBACK );
+
+MCALLBACK is defined as: void (*callback) (void* _arg)
+msi_session_t* handler is being thrown as _arg so you can use that and _agent_handler to get to your own phone handler
+directly from callback.
+
+
+Actions:
+int msi_invite ( msi_session_t* _session, call_type _call_type, uint32_t _timeoutms );
+Sends call invite. Before calling/sending invite msi_session_t::_friend_id is needed to be set or else
+it will not work. _call_type is type of the call ( Audio/Video ) and _timeoutms is how long 
+will poll wait until request is terminated.
+
+int msi_hangup ( msi_session_t* _session );
+Hangs up active call
+
+int msi_answer ( msi_session_t* _session, call_type _call_type );
+Answer incomming call. _call_type set's callee call type.
+
+int msi_cancel ( msi_session_t* _session );
+Cancel current request.
+
+int msi_reject ( msi_session_t* _session );
+Reject incomming call.
+
+
+
+
+Now for rtp:
+You will need 2 sessions; one for audio one for video.
+You start them with:
+
+rtp_session_t* rtp_init_session ( int _max_users, int _multi_session );
+
+Params:
+int _max_users - max users. -1 if undefined
+int _multi_session - any positive number means uses multi session; -1 if not.
+
+Return value:
+rtp_session_t* - pointer to a newly created rtp session handler.
+
+How to handle rtp session:
+Take a look at
+void* phone_handle_media_transport_poll ( void* _hmtc_args_p ) in phone.c
+on example. Basically what you do is just receive a message via:
+
+struct rtp_msg_s* rtp_recv_msg ( rtp_session_t* _session );
+
+and then you use payload within the rtp_msg_s struct. Don't forget to deallocate it with:
+void rtp_free_msg ( rtp_session_t* _session, struct rtp_msg_s* _msg );
+Receiving should be thread safe so don't worry about that.
+
+When you capture and encode a payload you want to send it ( obviously ).
+
+first create a new message with:
+struct rtp_msg_s* rtp_msg_new ( rtp_session_t* _session, const uint8_t* _data, uint32_t _length );
+
+and then send it with:
+int rtp_send_msg ( rtp_session_t* _session, struct rtp_msg_s* _msg, void* _core_handler );
+
+_core_handler is the same network handler as in msi_session_s struct.
+
+
+
+A/V initialization:
+
+int init_receive_audio(codec_state *cs);
+int init_receive_video(codec_state *cs);
+Initialises the A/V decoders. On failure it will print the reason and return 0. On success it will return 1.
+
+int init_send_audio(codec_state *cs);
+int init_send_video(codec_state *cs);
+Initialises the A/V encoders. On failure it will print the reason and return 0. On success it will return 1.
+init_send_audio will also let the user select an input device. init_send_video will determine the webcam's output codec and initialise the appropriate decoder.
+
+int video_encoder_refresh(codec_state *cs, int bps);
+Reinitialises the video encoder with a new bitrate. ffmpeg does not expose the needed VP8 feature to change the bitrate on the fly, so this serves as a workaround.
+In the future, VP8 should be used directly and ffmpeg should be dropped from the dependencies.
+The variable bps is the required bitrate in bits per second.
+
+
+
+A/V encoding/decoding:
+
+void *encode_video_thread(void *arg);
+Spawns the video encoding thread. The argument should hold a pointer to a codec_state.
+This function should only be called if video encoding is supported (when init_send_video returns 1).
+Each video frame gets encoded into a packet, which is sent via RTP. Every 60 frames a new bidirectional interframe is encoded.
+
+void *encode_audio_thread(void *arg);
+Spawns the audio encoding thread. The argument should hold a pointer to a codec_state.
+This function should only be called if audio encoding is supported (when init_send_audio returns 1).
+Audio frames are read from the selected audio capture device during intitialisation. This audio capturing can be rerouted to a different device on the fly.
+Each audio frame is encoded into a packet, and sent via RTP. All audio frames have the same amount of samples, which is defined in AV_codec.h.
+
+int video_decoder_refresh(codec_state *cs, int width, int height);
+Sets the SDL window dimensions and creates a pixel buffer with the requested size. It also creates a scaling context, which will be used to convert the input image format to YUV420P.
+
+void *decode_video_thread(void *arg);
+Spawns a video decoding thread. The argument should hold a pointer to a codec_state. The codec_state is assumed to contain a successfully initialised video decoder.
+This function reads video packets and feeds them to the video decoder. If the video frame's resolution has changed, video_decoder_refresh() is called. Afterwards, the frame is displayed on the SDL window.
+
+void *decode_audio_thread(void *arg);
+Spawns an audio decoding thread. The argument should hold a pointer to a codec_state. The codec_state is assumed to contain a successfully initialised audio decoder.
+All received audio packets are pushed into a jitter buffer and are reordered. If there is a missing packet, or a packet has arrived too late, it is treated as a lost packet and the audio decoder is informed of the packet loss. The audio decoder will then try to reconstruct the lost packet, based on information from previous packets.
+Audio is played on the default OpenAL output device.
+
+
+If you have any more qustions/bug reports/feature request contact the following users on the irc channel #tox-dev on irc.freenode.net:
+For RTP and MSI: mannol
+For audio and video: Martijnvdc
\ No newline at end of file
diff --git a/m4/ax_pthread.m4 b/m4/ax_pthread.m4
new file mode 100644
index 00000000..6d400ed4
--- /dev/null
+++ b/m4/ax_pthread.m4
@@ -0,0 +1,317 @@
+# ===========================================================================
+#        http://www.gnu.org/software/autoconf-archive/ax_pthread.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+#
+# DESCRIPTION
+#
+#   This macro figures out how to build C programs using POSIX threads. It
+#   sets the PTHREAD_LIBS output variable to the threads library and linker
+#   flags, and the PTHREAD_CFLAGS output variable to any special C compiler
+#   flags that are needed. (The user can also force certain compiler
+#   flags/libs to be tested by setting these environment variables.)
+#
+#   Also sets PTHREAD_CC to any special C compiler that is needed for
+#   multi-threaded programs (defaults to the value of CC otherwise). (This
+#   is necessary on AIX to use the special cc_r compiler alias.)
+#
+#   NOTE: You are assumed to not only compile your program with these flags,
+#   but also link it with them as well. e.g. you should link with
+#   $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
+#
+#   If you are only building threads programs, you may wish to use these
+#   variables in your default LIBS, CFLAGS, and CC:
+#
+#     LIBS="$PTHREAD_LIBS $LIBS"
+#     CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+#     CC="$PTHREAD_CC"
+#
+#   In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
+#   has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to that name
+#   (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
+#
+#   Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the
+#   PTHREAD_PRIO_INHERIT symbol is defined when compiling with
+#   PTHREAD_CFLAGS.
+#
+#   ACTION-IF-FOUND is a list of shell commands to run if a threads library
+#   is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
+#   is not found. If ACTION-IF-FOUND is not specified, the default action
+#   will define HAVE_PTHREAD.
+#
+#   Please let the authors know if this macro fails on any platform, or if
+#   you have any other suggestions or comments. This macro was based on work
+#   by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help
+#   from M. Frigo), as well as ac_pthread and hb_pthread macros posted by
+#   Alejandro Forero Cuervo to the autoconf macro repository. We are also
+#   grateful for the helpful feedback of numerous users.
+#
+#   Updated for Autoconf 2.68 by Daniel Richard G.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
+#   Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG>
+#
+#   This program 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.
+#
+#   This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 20
+
+AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
+AC_DEFUN([AX_PTHREAD], [
+AC_REQUIRE([AC_CANONICAL_HOST])
+AC_LANG_PUSH([C])
+ax_pthread_ok=no
+
+# We used to check for pthread.h first, but this fails if pthread.h
+# requires special compiler flags (e.g. on True64 or Sequent).
+# It gets checked for in the link test anyway.
+
+# First of all, check if the user has set any of the PTHREAD_LIBS,
+# etcetera environment variables, and if threads linking works using
+# them:
+if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
+        save_CFLAGS="$CFLAGS"
+        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+        save_LIBS="$LIBS"
+        LIBS="$PTHREAD_LIBS $LIBS"
+        AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
+        AC_TRY_LINK_FUNC(pthread_join, ax_pthread_ok=yes)
+        AC_MSG_RESULT($ax_pthread_ok)
+        if test x"$ax_pthread_ok" = xno; then
+                PTHREAD_LIBS=""
+                PTHREAD_CFLAGS=""
+        fi
+        LIBS="$save_LIBS"
+        CFLAGS="$save_CFLAGS"
+fi
+
+# We must check for the threads library under a number of different
+# names; the ordering is very important because some systems
+# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
+# libraries is broken (non-POSIX).
+
+# Create a list of thread flags to try.  Items starting with a "-" are
+# C compiler flags, and other items are library names, except for "none"
+# which indicates that we try without any flags at all, and "pthread-config"
+# which is a program returning the flags for the Pth emulation library.
+
+ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
+
+# The ordering *is* (sometimes) important.  Some notes on the
+# individual items follow:
+
+# pthreads: AIX (must check this before -lpthread)
+# none: in case threads are in libc; should be tried before -Kthread and
+#       other compiler flags to prevent continual compiler warnings
+# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
+# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
+# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
+# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
+# -pthreads: Solaris/gcc
+# -mthreads: Mingw32/gcc, Lynx/gcc
+# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
+#      doesn't hurt to check since this sometimes defines pthreads too;
+#      also defines -D_REENTRANT)
+#      ... -mt is also the pthreads flag for HP/aCC
+# pthread: Linux, etcetera
+# --thread-safe: KAI C++
+# pthread-config: use pthread-config program (for GNU Pth library)
+
+case ${host_os} in
+        solaris*)
+
+        # On Solaris (at least, for some versions), libc contains stubbed
+        # (non-functional) versions of the pthreads routines, so link-based
+        # tests will erroneously succeed.  (We need to link with -pthreads/-mt/
+        # -lpthread.)  (The stubs are missing pthread_cleanup_push, or rather
+        # a function called by this macro, so we could check for that, but
+        # who knows whether they'll stub that too in a future libc.)  So,
+        # we'll just look for -pthreads and -lpthread first:
+
+        ax_pthread_flags="-pthreads pthread -mt -pthread $ax_pthread_flags"
+        ;;
+
+        darwin*)
+        ax_pthread_flags="-pthread $ax_pthread_flags"
+        ;;
+esac
+
+if test x"$ax_pthread_ok" = xno; then
+for flag in $ax_pthread_flags; do
+
+        case $flag in
+                none)
+                AC_MSG_CHECKING([whether pthreads work without any flags])
+                ;;
+
+                -*)
+                AC_MSG_CHECKING([whether pthreads work with $flag])
+                PTHREAD_CFLAGS="$flag"
+                ;;
+
+                pthread-config)
+                AC_CHECK_PROG(ax_pthread_config, pthread-config, yes, no)
+                if test x"$ax_pthread_config" = xno; then continue; fi
+                PTHREAD_CFLAGS="`pthread-config --cflags`"
+                PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
+                ;;
+
+                *)
+                AC_MSG_CHECKING([for the pthreads library -l$flag])
+                PTHREAD_LIBS="-l$flag"
+                ;;
+        esac
+
+        save_LIBS="$LIBS"
+        save_CFLAGS="$CFLAGS"
+        LIBS="$PTHREAD_LIBS $LIBS"
+        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+
+        # Check for various functions.  We must include pthread.h,
+        # since some functions may be macros.  (On the Sequent, we
+        # need a special flag -Kthread to make this header compile.)
+        # We check for pthread_join because it is in -lpthread on IRIX
+        # while pthread_create is in libc.  We check for pthread_attr_init
+        # due to DEC craziness with -lpthreads.  We check for
+        # pthread_cleanup_push because it is one of the few pthread
+        # functions on Solaris that doesn't have a non-functional libc stub.
+        # We try pthread_create on general principles.
+        AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>
+                        static void routine(void *a) { a = 0; }
+                        static void *start_routine(void *a) { return a; }],
+                       [pthread_t th; pthread_attr_t attr;
+                        pthread_create(&th, 0, start_routine, 0);
+                        pthread_join(th, 0);
+                        pthread_attr_init(&attr);
+                        pthread_cleanup_push(routine, 0);
+                        pthread_cleanup_pop(0) /* ; */])],
+                [ax_pthread_ok=yes],
+                [])
+
+        LIBS="$save_LIBS"
+        CFLAGS="$save_CFLAGS"
+
+        AC_MSG_RESULT($ax_pthread_ok)
+        if test "x$ax_pthread_ok" = xyes; then
+                break;
+        fi
+
+        PTHREAD_LIBS=""
+        PTHREAD_CFLAGS=""
+done
+fi
+
+# Various other checks:
+if test "x$ax_pthread_ok" = xyes; then
+        save_LIBS="$LIBS"
+        LIBS="$PTHREAD_LIBS $LIBS"
+        save_CFLAGS="$CFLAGS"
+        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+
+        # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
+        AC_MSG_CHECKING([for joinable pthread attribute])
+        attr_name=unknown
+        for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
+            AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
+                           [int attr = $attr; return attr /* ; */])],
+                [attr_name=$attr; break],
+                [])
+        done
+        AC_MSG_RESULT($attr_name)
+        if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
+            AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name,
+                               [Define to necessary symbol if this constant
+                                uses a non-standard name on your system.])
+        fi
+
+        AC_MSG_CHECKING([if more special flags are required for pthreads])
+        flag=no
+        case ${host_os} in
+            aix* | freebsd* | darwin*) flag="-D_THREAD_SAFE";;
+            osf* | hpux*) flag="-D_REENTRANT";;
+            solaris*)
+            if test "$GCC" = "yes"; then
+                flag="-D_REENTRANT"
+            else
+                flag="-mt -D_REENTRANT"
+            fi
+            ;;
+        esac
+        AC_MSG_RESULT(${flag})
+        if test "x$flag" != xno; then
+            PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
+        fi
+
+        AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
+            ax_cv_PTHREAD_PRIO_INHERIT, [
+                AC_LINK_IFELSE([
+                    AC_LANG_PROGRAM([[#include <pthread.h>]], [[int i = PTHREAD_PRIO_INHERIT;]])],
+                    [ax_cv_PTHREAD_PRIO_INHERIT=yes],
+                    [ax_cv_PTHREAD_PRIO_INHERIT=no])
+            ])
+        AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes"],
+            AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], 1, [Have PTHREAD_PRIO_INHERIT.]))
+
+        LIBS="$save_LIBS"
+        CFLAGS="$save_CFLAGS"
+
+        # More AIX lossage: compile with *_r variant
+        if test "x$GCC" != xyes; then
+            case $host_os in
+                aix*)
+                AS_CASE(["x/$CC"],
+                  [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
+                  [#handle absolute path differently from PATH based program lookup
+                   AS_CASE(["x$CC"],
+                     [x/*],
+                     [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])],
+                     [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])])
+                ;;
+            esac
+        fi
+fi
+
+test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
+
+AC_SUBST(PTHREAD_LIBS)
+AC_SUBST(PTHREAD_CFLAGS)
+AC_SUBST(PTHREAD_CC)
+
+# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
+if test x"$ax_pthread_ok" = xyes; then
+        ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])
+        :
+else
+        ax_pthread_ok=no
+        $2
+fi
+AC_LANG_POP
+])dnl AX_PTHREAD
diff --git a/testing/misc_tools.c b/testing/misc_tools.c
index d05c88f6..efe1a555 100644
--- a/testing/misc_tools.c
+++ b/testing/misc_tools.c
@@ -46,7 +46,6 @@ unsigned char *hex_string_to_bin(char hex_string[])
     return val;
 }
 
-
 int cmdline_parsefor_ipv46(int argc, char **argv, uint8_t *ipv6enabled)
 {
     int argvoffset = 0, argi;
diff --git a/testing/nToxAudio.h b/testing/nToxAudio.h
new file mode 100644
index 00000000..19b31f8b
--- /dev/null
+++ b/testing/nToxAudio.h
@@ -0,0 +1,55 @@
+/* nTox.h
+ *
+ *Textual frontend for Tox.
+ *
+ *  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/>.
+ *
+ */
+
+#ifndef NTOX_H
+#define NTOX_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ncurses.h>
+#include <curses.h>
+#include <ctype.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/types.h>
+#include <netdb.h>
+#include "../core/Messenger.h"
+#include "../core/network.h"
+
+#define STRING_LENGTH 256
+#define HISTORY 50
+#define PUB_KEY_BYTES 32
+
+void new_lines(char *line);
+void line_eval(char *line);
+void wrap(char output[STRING_LENGTH], char input[STRING_LENGTH], int line_width) ;
+int count_lines(char *string) ;
+char *appender(char *str, const char c);
+void do_refresh();
+
+
+
+
+#endif
diff --git a/tools/astylerc b/tools/astylerc
index a2f05160..dd738b74 100644
--- a/tools/astylerc
+++ b/tools/astylerc
@@ -1,11 +1,11 @@
 --style=kr
---pad-header
---max-code-length=120
---convert-tabs
---indent-switches
---pad-oper
---align-pointer=name
---align-reference=name
---preserve-date
---lineend=linux
---break-blocks
\ No newline at end of file
+        --pad-header
+        --max-code-length=120
+                          --convert-tabs
+                          --indent-switches
+                          --pad-oper
+                          --align-pointer=name
+                                  --align-reference=name
+                                          --preserve-date
+                                          --lineend=linux
+                                                  --break-blocks
\ No newline at end of file
diff --git a/toxcore/Makefile.inc b/toxcore/Makefile.inc
index 025f23c8..116a3e29 100644
--- a/toxcore/Makefile.inc
+++ b/toxcore/Makefile.inc
@@ -1,4 +1,4 @@
-lib_LTLIBRARIES = libtoxcore.la
+lib_LTLIBRARIES += libtoxcore.la
 
 libtoxcore_la_include_HEADERS = \
                         ../toxcore/tox.h
@@ -34,7 +34,8 @@ libtoxcore_la_CFLAGS =  -I$(top_srcdir) \
                         $(LIBSODIUM_CFLAGS) \
                         $(NACL_CFLAGS)
 
-libtoxcore_la_LDFLAGS = $(EXTRA_LT_LDFLAGS) \
+libtoxcore_la_LDFLAGS = $(TOXCORE_LT_LDFLAGS) \
+                        $(EXTRA_LT_LDFLAGS) \
                         $(LIBSODIUM_LDFLAGS) \
                         $(NACL_LDFLAGS) \
                         $(WINSOCK2_LIBS)
diff --git a/toxcore/misc_tools.h b/toxcore/misc_tools.h
index 448c1cbd..5fd0cb7a 100644
--- a/toxcore/misc_tools.h
+++ b/toxcore/misc_tools.h
@@ -69,6 +69,63 @@
  * TODO: Update wiki.
  **********************************************************/
 
+/* Example usage
+
+This sample program makes a new struct which contains a
+character and a tox_list_t. It then prompts a user for
+input until he enters q or e. It then adds each character
+to the list, and uses a special for loop to print them.
+It then removes all the 'z' characters, and prints the list
+again.
+
+//Notice that the data to be put in the list *contains* tox_list_t;
+//usually, this is the other way around!
+typedef struct tox_string {
+   char c;
+   tox_list_t tox_lst; //Notice that tox_lst is *NOT* a pointer.
+} tox_string_t;
+
+int main()
+{
+   tox_list_t head;
+   tox_list_new(&head); //initialize head
+   
+   //input a new character, until user enters q or e
+   char c = '\0';
+   while (c != 'q' && c != 'e') {
+      scanf("%c", &c);
+      tox_string_t* tmp = malloc(sizeof(tox_string_t));
+      tmp->c = c;
+      tox_list_add(&head, &tmp->tox_lst); //add it to the list
+   }
+   
+TOX_LIST_FOR_EACH() takes a struct tox_list and a name for a temporary pointer to use in the loop.
+   
+TOX_LIST_GET_VALUE() uses magic to return an instance of a structure that contains tox_list_t.
+You have to give it a temporary tox_string_t, name of tox_list_t member inside our structure (tox_lst),
+and the type of structure to return.
+   
+   TOX_LIST_FOR_EACH(head, tmp)
+      printf("%c", TOX_LIST_GET_VALUE(*tmp, tox_lst, tox_string_t).c);
+   
+   TOX_LIST_FOR_EACH(head, tmp) {
+      if (TOX_LIST_GET_VALUE(*tmp, tox_lst, tox_string_t).c == 'z') {
+         //If you delete tmp, you have to quit the loop, or it will go on infinitly.
+         //This will be fixed later on.
+         tox_list_remove(tmp);
+         break;
+      }
+   }
+   
+   printf("\n");
+   TOX_LIST_FOR_EACH(head, tmp)
+      printf("%c", TOX_LIST_GET_VALUE(*tmp, tox_lst, tox_string_t).c);
+   
+   
+   return 0;
+}
+*/
+
 #define MEMBER_OFFSET(var_name_in_parent, parent_type) \
    (&(((parent_type*)0)->var_name_in_parent))
 
diff --git a/toxcore/network.c b/toxcore/network.c
index 38adc179..5d695b81 100644
--- a/toxcore/network.c
+++ b/toxcore/network.c
@@ -227,7 +227,7 @@ int sendpacket(Networking_Core *net, IP_Port ip_port, uint8_t *data, uint32_t le
  *  Packet length is put into length.
  *  Dump all empty packets.
  */
-static int receivepacket(sock_t sock, IP_Port *ip_port, uint8_t *data, uint32_t *length)
+int receivepacket(sock_t sock, IP_Port *ip_port, uint8_t *data, uint32_t *length)
 {
     struct sockaddr_storage addr;
 #ifdef WIN32
@@ -667,6 +667,7 @@ void kill_networking(Networking_Core *net)
     return;
 }
 
+
 /* ip_equal
  *  compares two IPAny structures
  *  unset means unequal
diff --git a/toxcore/network.h b/toxcore/network.h
index 8a0e20dc..0ce1f34d 100644
--- a/toxcore/network.h
+++ b/toxcore/network.h
@@ -285,4 +285,6 @@ Networking_Core *new_networking(IP ip, uint16_t port);
 /* Function to cleanup networking stuff (doesn't do much right now). */
 void kill_networking(Networking_Core *net);
 
+int receivepacket(sock_t sock, IP_Port *ip_port, uint8_t *data, uint32_t *length);
+
 #endif
diff --git a/toxcore/util.c b/toxcore/util.c
index e307bad6..8fc6806e 100644
--- a/toxcore/util.c
+++ b/toxcore/util.c
@@ -25,7 +25,7 @@ uint64_t random_64b()
 {
     uint64_t r;
 
-    // This is probably not random enough?
+    /* This is probably not random enough? */
     r = random_int();
     r <<= 32;
     r |= random_int();