1 files changed, 551 insertions, 0 deletions

diff --git a/toxav/toxav.c b/toxav/toxav.c
new file mode 100644
index 00000000..f704bc6b
--- /dev/null
+++ b/toxav/toxav.c
@@ -0,0 +1,551 @@
+/**  toxav.c
+ *
+ *   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
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include "media.h"
+#include "rtp.h"
+#include "msi.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include "toxav.h"
+
+#define inline__ inline __attribute__((always_inline))
+
+static const uint8_t audio_index = 0, video_index = 1;
+
+
+typedef enum {
+    ts_closing,
+    ts_running,
+    ts_closed
+
+} ThreadState;
+
+typedef struct _ToxAv {
+    Messenger *messenger;
+
+    MSISession *msi_session; /** Main msi session */
+
+    RTPSession *rtp_sessions[2]; /* Audio is first and video is second */
+
+    struct jitter_buffer *j_buf;
+    CodecState *cs;
+
+    void *agent_handler;
+} ToxAv;
+
+/**
+ * @brief Start new A/V session. There can only be one session at the time. If you register more
+ *        it will result in undefined behaviour.
+ *
+ * @param messenger The messenger handle.
+ * @param useragent The agent handling A/V session (i.e. phone).
+ * @param ua_name Useragent name.
+ * @param video_width Width of video frame.
+ * @param video_height Height of video frame.
+ * @return ToxAv*
+ * @retval NULL On error.
+ */
+ToxAv *toxav_new( Tox *messenger, void *useragent, const char *ua_name , uint16_t video_width, uint16_t video_height)
+{
+    ToxAv *av = calloc ( sizeof(ToxAv), 1);
+
+    if (av == NULL)
+        return NULL;
+
+    av->messenger = (Messenger *)messenger;
+
+    av->msi_session = msi_init_session(av->messenger, (const unsigned char *) ua_name );
+    av->msi_session->agent_handler = av;
+
+    av->rtp_sessions[0] = av->rtp_sessions [1] = NULL;
+
+    /* NOTE: This should be user defined or? */
+    av->j_buf = create_queue(20);
+
+    av->cs = codec_init_session(AUDIO_BITRATE, AUDIO_FRAME_DURATION, AUDIO_SAMPLE_RATE, AUDIO_CHANNELS, video_width,
+                                video_height, VIDEO_BITRATE);
+
+    av->agent_handler = useragent;
+
+    return av;
+}
+
+/**
+ * @brief Remove A/V session.
+ *
+ * @param av Handler.
+ * @return void
+ */
+void toxav_kill ( ToxAv *av )
+{
+    msi_terminate_session(av->msi_session);
+
+    if ( av->rtp_sessions[audio_index] ) {
+        rtp_terminate_session(av->rtp_sessions[audio_index], av->msi_session->messenger_handle);
+    }
+
+    if ( av->rtp_sessions[video_index] ) {
+        rtp_terminate_session(av->rtp_sessions[video_index], av->msi_session->messenger_handle);
+    }
+
+    codec_terminate_session(av->cs);
+
+    free(av);
+}
+
+/**
+ * @brief Register callback for call state.
+ *
+ * @param callback The callback
+ * @param id One of the ToxAvCallbackID values
+ * @return void
+ */
+void toxav_register_callstate_callback ( ToxAVCallback callback, ToxAvCallbackID id )
+{
+    msi_register_callback((MSICallback)callback, (MSICallbackID) id);
+}
+
+/**
+ * @brief Call user. Use its friend_id.
+ *
+ * @param av Handler.
+ * @param user The user.
+ * @param call_type Call type.
+ * @param ringing_seconds Ringing timeout.
+ * @return int
+ * @retval 0 Success.
+ * @retval ToxAvError On error.
+ */
+int toxav_call (ToxAv *av, int user, ToxAvCallType call_type, int ringing_seconds )
+{
+    if ( av->msi_session->call ) {
+        return ErrorAlreadyInCall;
+    }
+
+    return msi_invite(av->msi_session, call_type, ringing_seconds * 1000, user);
+}
+
+/**
+ * @brief Hangup active call.
+ *
+ * @param av Handler.
+ * @return int
+ * @retval 0 Success.
+ * @retval ToxAvError On error.
+ */
+int toxav_hangup ( ToxAv *av )
+{
+    if ( !av->msi_session->call ) {
+        return ErrorNoCall;
+    }
+
+    if ( av->msi_session->call->state != call_active ) {
+        return ErrorInvalidState;
+    }
+
+    return msi_hangup(av->msi_session);
+}
+
+/**
+ * @brief Answer incomming call.
+ *
+ * @param av Handler.
+ * @param call_type Answer with...
+ * @return int
+ * @retval 0 Success.
+ * @retval ToxAvError On error.
+ */
+int toxav_answer ( ToxAv *av, ToxAvCallType call_type )
+{
+    if ( !av->msi_session->call ) {
+        return ErrorNoCall;
+    }
+
+    if ( av->msi_session->call->state != call_starting ) {
+        return ErrorInvalidState;
+    }
+
+    return msi_answer(av->msi_session, call_type);
+}
+
+/**
+ * @brief Reject incomming call.
+ *
+ * @param av Handler.
+ * @param reason Optional reason. Set NULL if none.
+ * @return int
+ * @retval 0 Success.
+ * @retval ToxAvError On error.
+ */
+int toxav_reject ( ToxAv *av, const char *reason )
+{
+    if ( !av->msi_session->call ) {
+        return ErrorNoCall;
+    }
+
+    if ( av->msi_session->call->state != call_starting ) {
+        return ErrorInvalidState;
+    }
+
+    return msi_reject(av->msi_session, (const uint8_t *) reason);
+}
+
+/**
+ * @brief Cancel outgoing request.
+ *
+ * @param av Handler.
+ * @param reason Optional reason.
+ * @return int
+ * @retval 0 Success.
+ * @retval ToxAvError On error.
+ */
+int toxav_cancel ( ToxAv *av, const char *reason )
+{
+    if ( !av->msi_session->call ) {
+        return ErrorNoCall;
+    }
+
+    return msi_cancel(av->msi_session, 0, (const uint8_t *)reason);
+}
+
+/**
+ * @brief Terminate transmission. Note that transmission will be terminated without informing remote peer.
+ *
+ * @param av Handler.
+ * @return int
+ * @retval 0 Success.
+ * @retval ToxAvError On error.
+ */
+int toxav_stop_call ( ToxAv *av )
+{
+    if ( !av->msi_session->call ) {
+        return ErrorNoCall;
+    }
+
+    return msi_stopcall(av->msi_session);
+}
+
+/**
+ * @brief Must be call before any RTP transmission occurs.
+ *
+ * @param av Handler.
+ * @return int
+ * @retval 0 Success.
+ * @retval ToxAvError On error.
+ */
+int toxav_prepare_transmission ( ToxAv *av )
+{
+    assert(av->msi_session);
+
+    if ( !av->msi_session || !av->msi_session->call ) {
+        return ErrorNoCall;
+    }
+
+    av->rtp_sessions[audio_index] = rtp_init_session(
+                                        type_audio,
+                                        av->messenger,
+                                        av->msi_session->call->peers[0],
+                                        av->msi_session->call->key_peer,
+                                        av->msi_session->call->key_local,
+                                        av->msi_session->call->nonce_peer,
+                                        av->msi_session->call->nonce_local
+                                    );
+
+
+    if ( !av->rtp_sessions[audio_index] ) {
+        fprintf(stderr, "Error while starting audio RTP session!\n");
+        return ErrorStartingAudioRtp;
+    }
+
+    av->rtp_sessions[video_index] = rtp_init_session (
+                                        type_video,
+                                        av->messenger,
+                                        av->msi_session->call->peers[0],
+                                        av->msi_session->call->key_peer,
+                                        av->msi_session->call->key_local,
+                                        av->msi_session->call->nonce_peer,
+                                        av->msi_session->call->nonce_local
+                                    );
+
+
+    if ( !av->rtp_sessions[video_index] ) {
+        fprintf(stderr, "Error while starting video RTP session!\n");
+        return ErrorStartingVideoRtp;
+    }
+
+    return ErrorNone;
+}
+
+/**
+ * @brief Call this at the end of the transmission.
+ *
+ * @param av Handler.
+ * @return int
+ * @retval 0 Success.
+ * @retval ToxAvError On error.
+ */
+int toxav_kill_transmission ( ToxAv *av )
+{
+    /* Both sessions should be active at any time */
+    if ( !av->rtp_sessions[0] || !av->rtp_sessions[0] )
+        return ErrorNoTransmission;
+
+
+    if ( -1 == rtp_terminate_session(av->rtp_sessions[audio_index], av->messenger) ) {
+        fprintf(stderr, "Error while terminating audio RTP session!\n");
+        return ErrorTerminatingAudioRtp;
+    }
+
+    if ( -1 == rtp_terminate_session(av->rtp_sessions[video_index], av->messenger) ) {
+        fprintf(stderr, "Error while terminating video RTP session!\n");
+        return ErrorTerminatingVideoRtp;
+    }
+
+    return ErrorNone;
+}
+
+
+/**
+ * @brief Send RTP payload.
+ *
+ * @param av Handler.
+ * @param type Type of payload.
+ * @param payload The payload.
+ * @param length Size of it.
+ * @return int
+ * @retval 0 Success.
+ * @retval -1 Failure.
+ */
+inline__ int toxav_send_rtp_payload ( ToxAv *av, ToxAvCallType type, const uint8_t *payload, uint16_t length )
+{
+    if ( av->rtp_sessions[type - TypeAudio] )
+        return rtp_send_msg ( av->rtp_sessions[type - TypeAudio], av->msi_session->messenger_handle, payload, length );
+    else return -1;
+}
+
+/**
+ * @brief Receive RTP payload.
+ *
+ * @param av Handler.
+ * @param type Type of the payload.
+ * @param dest Storage.
+ * @return int
+ * @retval ToxAvError On Error.
+ * @retval >=0 Size of received payload.
+ */
+inline__ int toxav_recv_rtp_payload ( ToxAv *av, ToxAvCallType type, uint8_t *dest )
+{
+    if ( !dest ) return ErrorInternal;
+
+    if ( !av->rtp_sessions[type - TypeAudio] ) return ErrorNoRtpSession;
+
+    RTPMessage *message;
+
+    if ( type == TypeAudio ) {
+
+        do {
+            message = rtp_recv_msg(av->rtp_sessions[audio_index]);
+
+            if (message) {
+                /* push the packet into the queue */
+                queue(av->j_buf, message);
+            }
+        } while (message);
+
+        int success = 0;
+        message = dequeue(av->j_buf, &success);
+
+        if ( success == 2) return ErrorAudioPacketLost;
+    } else {
+        message = rtp_recv_msg(av->rtp_sessions[video_index]);
+    }
+
+    if ( message ) {
+        memcpy(dest, message->data, message->length);
+
+        int length = message->length;
+
+        rtp_free_msg(NULL, message);
+
+        return length;
+    }
+
+    return 0;
+}
+
+/**
+ * @brief Receive decoded video packet.
+ *
+ * @param av Handler.
+ * @param output Storage.
+ * @return int
+ * @retval 0 Success.
+ * @retval ToxAvError On Error.
+ */
+inline__ int toxav_recv_video ( ToxAv *av, vpx_image_t **output)
+{
+    if ( !output ) return ErrorInternal;
+
+    uint8_t packet [RTP_PAYLOAD_SIZE];
+    int recved_size = 0;
+
+    do {
+        recved_size = toxav_recv_rtp_payload(av, TypeVideo, packet);
+
+        if (recved_size > 0) {
+            printf("decode: %s\n", vpx_codec_err_to_string(vpx_codec_decode(&av->cs->v_decoder, packet, recved_size, NULL, 0)));
+        }
+    } while (recved_size > 0);
+
+    vpx_codec_iter_t iter = NULL;
+    vpx_image_t *img;
+    img = vpx_codec_get_frame(&av->cs->v_decoder, &iter);
+
+    if (img == NULL)
+        return ErrorInternal;
+
+    *output = img;
+    return 0;
+}
+
+/**
+ * @brief Encode and send video packet.
+ *
+ * @param av Handler.
+ * @param input The packet.
+ * @return int
+ * @retval 0 Success.
+ * @retval ToxAvError On error.
+ */
+inline__ int toxav_send_video ( ToxAv *av, vpx_image_t *input)
+{
+    if (vpx_codec_encode(&av->cs->v_encoder, input, av->cs->frame_counter, 1, 0, MAX_ENCODE_TIME_US) != VPX_CODEC_OK) {
+        printf("could not encode video frame\n");
+        return ErrorInternal;
+    }
+
+    ++av->cs->frame_counter;
+
+    vpx_codec_iter_t iter = NULL;
+    const vpx_codec_cx_pkt_t *pkt;
+    int sent = 0;
+
+    while ( (pkt = vpx_codec_get_cx_data(&av->cs->v_encoder, &iter)) ) {
+        if (pkt->kind == VPX_CODEC_CX_FRAME_PKT) {
+            if (toxav_send_rtp_payload(av, TypeVideo, pkt->data.frame.buf, pkt->data.frame.sz) != -1)
+                ++sent;
+        }
+    }
+
+    if (sent > 0)
+        return 0;
+
+    return ErrorInternal;
+}
+
+/**
+ * @brief Receive decoded audio frame.
+ *
+ * @param av Handler.
+ * @param frame_size ...
+ * @param dest Destination of the packet. Make sure it has enough space for
+ *             RTP_PAYLOAD_SIZE bytes.
+ * @return int
+ * @retval >=0 Size of received packet.
+ * @retval ToxAvError On error.
+ */
+inline__ int toxav_recv_audio ( ToxAv *av, int frame_size, int16_t *dest )
+{
+    if ( !dest ) return ErrorInternal;
+
+    uint8_t packet [RTP_PAYLOAD_SIZE];
+
+    int recved_size = toxav_recv_rtp_payload(av, TypeAudio, packet);
+
+    if ( recved_size == ErrorAudioPacketLost ) {
+        printf("Lost packet\n");
+        return opus_decode(av->cs->audio_decoder, NULL, 0, dest, frame_size, 1);
+    } else if ( recved_size ) {
+        return opus_decode(av->cs->audio_decoder, packet, recved_size, dest, frame_size, 0);
+    } else {
+        return 0; /* Nothing received */
+    }
+}
+
+/**
+ * @brief Encode and send audio frame.
+ *
+ * @param av Handler.
+ * @param frame The frame.
+ * @param frame_size It's size.
+ * @return int
+ * @retval 0 Success.
+ * @retval ToxAvError On error.
+ */
+inline__ int toxav_send_audio ( ToxAv *av, const int16_t *frame, int frame_size)
+{
+    uint8_t temp_data[RTP_PAYLOAD_SIZE];
+    int32_t ret = opus_encode(av->cs->audio_encoder, frame, frame_size, temp_data, sizeof(temp_data));
+
+    if (ret <= 0)
+        return ErrorInternal;
+
+    return toxav_send_rtp_payload(av, TypeAudio, temp_data, ret);
+}
+
+/**
+ * @brief Get peer transmission type. It can either be audio or video.
+ *
+ * @param av Handler.
+ * @param peer The peer
+ * @return int
+ * @retval ToxAvCallType On success.
+ * @retval ToxAvError On error.
+ */
+int toxav_get_peer_transmission_type ( ToxAv *av, int peer )
+{
+    assert(av->msi_session);
+
+    if ( peer < 0 || !av->msi_session->call || av->msi_session->call->peer_count <= peer )
+        return ErrorInternal;
+
+    return av->msi_session->call->type_peer[peer];
+}
+
+/**
+ * @brief Get reference to an object that is handling av session.
+ *
+ * @param av Handler.
+ * @return void*
+ */
+void *toxav_get_agent_handler ( ToxAv *av )
+{
+    return av->agent_handler;
+}