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tomato/external/toxcore/c-toxcore/toxav/toxav.c

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/* SPDX-License-Identifier: GPL-3.0-or-later
* Copyright © 2016-2025 The TokTok team.
* Copyright © 2013-2015 Tox project.
*/
#include "toxav.h"
#include <assert.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include "msi.h"
#include "rtp.h"
#include "audio.h"
#include "video.h"
#include "bwcontroller.h"
#include "../toxcore/Messenger.h"
#include "../toxcore/ccompat.h"
#include "../toxcore/logger.h"
#include "../toxcore/mono_time.h"
#include "../toxcore/net_crypto.h"
#include "../toxcore/network.h"
#include "../toxcore/tox.h"
#include "../toxcore/tox_private.h"
#include "../toxcore/tox_struct.h" // IWYU pragma: keep
#include "../toxcore/util.h"
#define VIDEO_SEND_X_KEYFRAMES_FIRST 7 // force the first n frames to be keyframes!
// iteration interval that is used when no call is active
#define IDLE_ITERATION_INTERVAL_MS 1000
typedef struct ToxAVCall ToxAVCall;
static ToxAVCall *call_get(ToxAV *av, uint32_t friend_number);
static RTPSession *rtp_session_get(ToxAVCall *call, int payload_type);
static BWController *bwc_controller_get(const ToxAVCall *call);
struct ToxAVCall {
ToxAV *av;
pthread_mutex_t mutex_audio[1];
RTPSession *audio_rtp;
ACSession *audio;
pthread_mutex_t mutex_video[1];
RTPSession *video_rtp;
VCSession *video;
BWController *bwc;
bool active;
MSICall *msi_call;
Tox_Friend_Number friend_number;
uint32_t audio_bit_rate; /* Sending audio bit rate */
uint32_t video_bit_rate; /* Sending video bit rate */
/** Required for monitoring changes in states */
uint8_t previous_self_capabilities;
toxav_audio_receive_frame_cb *acb;
void *acb_user_data;
pthread_mutex_t toxav_call_mutex[1];
struct ToxAVCall *prev;
struct ToxAVCall *next;
};
/** Decode time statistics */
typedef struct DecodeTimeStats {
/** Measure count */
int32_t count;
/** Last cycle total */
int32_t total;
/** Average decoding time in ms */
int32_t average;
/** Calculated iteration interval */
uint32_t interval;
} DecodeTimeStats;
struct ToxAV {
const struct Tox_Memory *mem;
Logger *log;
Tox *tox;
MSISession *msi;
/* Two-way storage: first is array of calls and second is list of calls with head and tail */
ToxAVCall **calls;
uint32_t calls_tail;
uint32_t calls_head;
pthread_mutex_t mutex[1];
/* Call callback */
toxav_call_cb *ccb;
void *ccb_user_data;
/* Call state callback */
toxav_call_state_cb *scb;
void *scb_user_data;
/* Audio frame receive callback */
toxav_audio_receive_frame_cb *acb;
void *acb_user_data;
/* Video frame receive callback */
toxav_video_receive_frame_cb *vcb;
void *vcb_user_data;
/* Bit rate control callback */
toxav_audio_bit_rate_cb *abcb;
void *abcb_user_data;
/* Bit rate control callback */
toxav_video_bit_rate_cb *vbcb;
void *vbcb_user_data;
/* keep track of decode times for audio and video */
DecodeTimeStats audio_stats;
DecodeTimeStats video_stats;
Mono_Time *toxav_mono_time; // ToxAV's own mono_time instance
};
static void callback_bwc(BWController *bwc, Tox_Friend_Number friend_number, float loss, void *user_data);
static int msi_send_packet(void *user_data, uint32_t friend_number, const uint8_t *data, size_t length)
{
Tox *tox = (Tox *)user_data;
const size_t length_new = length + 1;
VLA(uint8_t, data_new, length_new);
data_new[0] = PACKET_ID_MSI;
memcpy(data_new + 1, data, length);
Tox_Err_Friend_Custom_Packet error;
tox_friend_send_lossless_packet(tox, friend_number, data_new, length_new, &error);
return error == TOX_ERR_FRIEND_CUSTOM_PACKET_OK ? 0 : -1;
}
static void handle_msi_packet(Tox *tox, uint32_t friend_number, const uint8_t *data, size_t length,
void *user_data)
{
ToxAV *toxav = (ToxAV *)tox_get_av_object(tox);
if (toxav == nullptr) {
return;
}
if (length < 2) {
LOGGER_ERROR(toxav->log, "MSI packet is less than 2 bytes in size");
return;
}
msi_handle_packet(toxav->msi, toxav->log, friend_number, data + 1, length - 1);
}
static int rtp_send_packet(void *user_data, const uint8_t *data, uint16_t length)
{
ToxAVCall *call = (ToxAVCall *)user_data;
Tox_Err_Friend_Custom_Packet error;
tox_friend_send_lossy_packet(call->av->tox, call->friend_number, data, length, &error);
return error == TOX_ERR_FRIEND_CUSTOM_PACKET_OK ? 0 : -1;
}
static void rtp_add_recv(void *user_data, uint32_t bytes)
{
BWController *bwc = (BWController *)user_data;
bwc_add_recv(bwc, bytes);
}
static void rtp_add_lost(void *user_data, uint32_t bytes)
{
BWController *bwc = (BWController *)user_data;
bwc_add_lost(bwc, bytes);
}
static void handle_rtp_packet(Tox *tox, Tox_Friend_Number friend_number, const uint8_t *data, size_t length, void *user_data)
{
ToxAV *toxav = (ToxAV *)tox_get_av_object(tox);
if (toxav == nullptr) {
return;
}
ToxAVCall *call = call_get(toxav, friend_number);
if (call == nullptr) {
return;
}
RTPSession *session = rtp_session_get(call, data[0]);
if (session == nullptr) {
return;
}
if (!rtp_session_is_receiving_active(session)) {
return;
}
rtp_receive_packet(session, data, length);
}
static void handle_bwc_packet(Tox *tox, uint32_t friend_number, const uint8_t *data, size_t length, void *user_data)
{
ToxAV *toxav = (ToxAV *)tox_get_av_object(tox);
if (toxav == nullptr) {
return;
}
const ToxAVCall *call = call_get(toxav, friend_number);
if (call == nullptr) {
return;
}
BWController *bwc = bwc_controller_get(call);
if (bwc == nullptr) {
return;
}
bwc_handle_packet(bwc, data, length);
}
static void handle_audio_frame(uint32_t friend_number, const int16_t *pcm, size_t sample_count, uint8_t channels,
uint32_t sampling_rate, void *user_data)
{
ToxAVCall *call = (ToxAVCall *)user_data;
toxav_audio_receive_frame_cb *acb = call->acb;
void *acb_user_data = call->acb_user_data;
if (acb != nullptr) {
acb(call->av, friend_number, pcm, sample_count, channels, sampling_rate, acb_user_data);
}
}
static void handle_video_frame(uint32_t friend_number, uint16_t width, uint16_t height,
const uint8_t *y, const uint8_t *u, const uint8_t *v,
int32_t ystride, int32_t ustride, int32_t vstride,
void *user_data)
{
ToxAVCall *call = (ToxAVCall *)user_data;
toxav_video_receive_frame_cb *vcb = call->av->vcb;
void *vcb_user_data = call->av->vcb_user_data;
if (vcb != nullptr) {
vcb(call->av, friend_number, width, height, y, u, v, ystride, ustride, vstride, vcb_user_data);
}
}
static int callback_invite(void *object, MSICall *call);
static int callback_start(void *object, MSICall *call);
static int callback_end(void *object, MSICall *call);
static int callback_error(void *object, MSICall *call);
static int callback_capabilities(void *object, MSICall *call);
static bool audio_bit_rate_invalid(uint32_t bit_rate);
static bool video_bit_rate_invalid(uint32_t bit_rate);
static bool invoke_call_state_callback(ToxAV *av, Tox_Friend_Number friend_number, uint32_t state);
static ToxAVCall *call_new(ToxAV *av, Tox_Friend_Number friend_number, Toxav_Err_Call *error);
static ToxAVCall *call_remove(ToxAVCall *call);
static bool call_prepare_transmission(ToxAVCall *call);
static void call_kill_transmission(ToxAVCall *call);
static ToxAVCall *call_get(ToxAV *av, uint32_t friend_number)
{
if (av == nullptr) {
return nullptr;
}
/* Assumes mutex locked */
if (av->calls == nullptr || av->calls_tail < friend_number) {
return nullptr;
}
return av->calls[friend_number];
}
static RTPSession *rtp_session_get(ToxAVCall *call, int payload_type)
{
if (call == nullptr) {
return nullptr;
}
if (payload_type == RTP_TYPE_VIDEO) {
return call->video_rtp;
} else {
return call->audio_rtp;
}
}
static BWController *bwc_controller_get(const ToxAVCall *call)
{
if (call == nullptr) {
return nullptr;
}
return call->bwc;
}
/**
* @brief initialize d with default values
* @param d struct to be initialized, must not be nullptr
*/
static void init_decode_time_stats(DecodeTimeStats *d)
{
assert(d != nullptr);
d->count = 0;
d->total = 0;
d->average = 0;
d->interval = IDLE_ITERATION_INTERVAL_MS;
}
ToxAV *toxav_new(Tox *tox, Toxav_Err_New *error)
{
const MSICallbacks callbacks = {
callback_invite,
callback_start,
callback_end,
callback_error,
callback_error, // peertimeout
callback_capabilities,
};
Toxav_Err_New rc = TOXAV_ERR_NEW_OK;
ToxAV *av = nullptr;
if (tox == nullptr) {
rc = TOXAV_ERR_NEW_NULL;
goto RETURN;
}
av = (ToxAV *)calloc(1, sizeof(ToxAV));
if (av == nullptr) {
rc = TOXAV_ERR_NEW_MALLOC;
goto RETURN;
}
if (create_recursive_mutex(av->mutex) != 0) {
rc = TOXAV_ERR_NEW_MALLOC;
goto RETURN;
}
av->mem = tox->sys.mem;
av->log = tox->m->log;
av->tox = tox;
av->msi = msi_new(av->log, msi_send_packet, av->tox, &callbacks, av);
tox_callback_friend_lossy_packet_per_pktid(av->tox, handle_rtp_packet, RTP_TYPE_AUDIO);
tox_callback_friend_lossy_packet_per_pktid(av->tox, handle_rtp_packet, RTP_TYPE_VIDEO);
tox_callback_friend_lossy_packet_per_pktid(av->tox, handle_bwc_packet, BWC_PACKET_ID);
tox_callback_friend_lossless_packet_per_pktid(av->tox, handle_msi_packet, PACKET_ID_MSI);
av->toxav_mono_time = mono_time_new(tox->sys.mem, nullptr, nullptr);
if (av->msi == nullptr) {
pthread_mutex_destroy(av->mutex);
rc = TOXAV_ERR_NEW_MALLOC;
goto RETURN;
}
init_decode_time_stats(&av->audio_stats);
init_decode_time_stats(&av->video_stats);
// save ToxAV object into toxcore
tox_set_av_object(av->tox, av);
RETURN:
if (error != nullptr) {
*error = rc;
}
if (rc != TOXAV_ERR_NEW_OK) {
if (av != nullptr) {
free(av);
av = nullptr;
}
}
return av;
}
void toxav_kill(ToxAV *av)
{
if (av == nullptr) {
return;
}
pthread_mutex_lock(av->mutex);
// unregister callbacks
for (uint8_t i = PACKET_ID_RANGE_LOSSY_AV_START; i <= PACKET_ID_RANGE_LOSSY_AV_END; ++i) {
tox_callback_friend_lossy_packet_per_pktid(av->tox, nullptr, i);
}
tox_callback_friend_lossy_packet_per_pktid(av->tox, nullptr, RTP_TYPE_AUDIO);
tox_callback_friend_lossy_packet_per_pktid(av->tox, nullptr, RTP_TYPE_VIDEO);
tox_callback_friend_lossy_packet_per_pktid(av->tox, nullptr, BWC_PACKET_ID);
tox_callback_friend_lossless_packet_per_pktid(av->tox, nullptr, PACKET_ID_MSI);
/* To avoid possible deadlocks */
while (av->msi != nullptr && msi_kill(av->log, av->msi) != 0) {
pthread_mutex_unlock(av->mutex);
pthread_mutex_lock(av->mutex);
}
/* Msi kill will hang up all calls so just clean these calls */
if (av->calls != nullptr) {
ToxAVCall *it = call_get(av, av->calls_head);
while (it != nullptr) {
call_kill_transmission(it);
it->msi_call = nullptr; /* msi_kill() frees the call's msi_call handle; which causes #278 */
it = call_remove(it); /* This will eventually free av->calls */
}
}
mono_time_free(av->tox->sys.mem, av->toxav_mono_time);
pthread_mutex_unlock(av->mutex);
pthread_mutex_destroy(av->mutex);
// set ToxAV object to NULL in toxcore, to signal ToxAV has been shutdown
tox_set_av_object(av->tox, nullptr);
free(av);
}
Tox *toxav_get_tox(const ToxAV *av)
{
return av->tox;
}
uint32_t toxav_audio_iteration_interval(const ToxAV *av)
{
return av->calls != nullptr ? av->audio_stats.interval : IDLE_ITERATION_INTERVAL_MS;
}
uint32_t toxav_video_iteration_interval(const ToxAV *av)
{
return av->calls != nullptr ? av->video_stats.interval : IDLE_ITERATION_INTERVAL_MS;
}
uint32_t toxav_iteration_interval(const ToxAV *av)
{
return min_u32(toxav_audio_iteration_interval(av),
toxav_video_iteration_interval(av));
}
/**
* @brief calc_interval Calculates the needed iteration interval based on previous decode times
* @param av ToxAV struct to work on
* @param stats Statistics to update
* @param frame_time the duration of the current frame in ms
* @param start_time the timestamp when decoding of this frame started
*/
static void calc_interval(const ToxAV *av, DecodeTimeStats *stats, int32_t frame_time, uint64_t start_time)
{
stats->interval = frame_time < stats->average ? 0 : (frame_time - stats->average);
stats->total += current_time_monotonic(av->toxav_mono_time) - start_time;
if (++stats->count == 3) {
/* NOTE: Magic Offset for precision */
stats->average = stats->total / 3 + 5;
stats->count = 0;
stats->total = 0;
}
}
/**
* @brief common iterator function for audio and video calls
* @param av pointer to ToxAV structure of current instance
* @param audio if true, iterate audio, video else
*/
static void iterate_common(ToxAV *av, bool audio)
{
pthread_mutex_lock(av->mutex);
if (av->calls == nullptr) {
pthread_mutex_unlock(av->mutex);
return;
}
const uint64_t start = current_time_monotonic(av->toxav_mono_time);
int32_t frame_time = IDLE_ITERATION_INTERVAL_MS;
for (ToxAVCall *i = av->calls[av->calls_head]; i != nullptr; i = i->next) {
if (!i->active) {
continue;
}
pthread_mutex_lock(i->toxav_call_mutex);
pthread_mutex_unlock(av->mutex);
const uint32_t fid = i->friend_number;
Tox_Err_Friend_Query f_con_query_error;
const bool is_offline = tox_friend_get_connection_status(av->tox, fid, &f_con_query_error) == TOX_CONNECTION_NONE;
if (is_offline) {
msi_call_timeout(i->msi_call->session, av->log, fid);
pthread_mutex_unlock(i->toxav_call_mutex);
pthread_mutex_lock(av->mutex);
break;
}
if (audio) {
ac_iterate(i->audio);
if ((i->msi_call->self_capabilities & MSI_CAP_R_AUDIO) != 0 &&
(i->msi_call->peer_capabilities & MSI_CAP_S_AUDIO) != 0) {
frame_time = min_s32(ac_get_lp_frame_duration(i->audio), frame_time);
}
} else {
vc_iterate(i->video);
if ((i->msi_call->self_capabilities & MSI_CAP_R_VIDEO) != 0 &&
(i->msi_call->peer_capabilities & MSI_CAP_S_VIDEO) != 0) {
pthread_mutex_lock(vc_get_queue_mutex(i->video));
frame_time = min_s32(vc_get_lcfd(i->video), frame_time);
pthread_mutex_unlock(vc_get_queue_mutex(i->video));
}
}
pthread_mutex_unlock(i->toxav_call_mutex);
pthread_mutex_lock(av->mutex);
/* In case this call is popped from container stop iteration */
if (call_get(av, fid) != i) {
break;
}
}
DecodeTimeStats *stats = audio ? &av->audio_stats : &av->video_stats;
calc_interval(av, stats, frame_time, start);
pthread_mutex_unlock(av->mutex);
}
void toxav_audio_iterate(ToxAV *av)
{
iterate_common(av, true);
}
void toxav_video_iterate(ToxAV *av)
{
iterate_common(av, false);
}
void toxav_iterate(ToxAV *av)
{
toxav_audio_iterate(av);
toxav_video_iterate(av);
}
bool toxav_call(ToxAV *av, Tox_Friend_Number friend_number, uint32_t audio_bit_rate, uint32_t video_bit_rate,
Toxav_Err_Call *error)
{
Toxav_Err_Call rc = TOXAV_ERR_CALL_OK;
ToxAVCall *call;
pthread_mutex_lock(av->mutex);
if ((audio_bit_rate != 0 && audio_bit_rate_invalid(audio_bit_rate))
|| (video_bit_rate != 0 && video_bit_rate_invalid(video_bit_rate))) {
rc = TOXAV_ERR_CALL_INVALID_BIT_RATE;
goto RETURN;
}
call = call_new(av, friend_number, &rc);
if (call == nullptr) {
goto RETURN;
}
call->audio_bit_rate = audio_bit_rate;
call->video_bit_rate = video_bit_rate;
call->previous_self_capabilities = MSI_CAP_R_AUDIO | MSI_CAP_R_VIDEO;
call->previous_self_capabilities |= audio_bit_rate > 0 ? MSI_CAP_S_AUDIO : 0;
call->previous_self_capabilities |= video_bit_rate > 0 ? MSI_CAP_S_VIDEO : 0;
if (msi_invite(av->log, av->msi, &call->msi_call, friend_number, call->previous_self_capabilities) != 0) {
call_remove(call);
rc = TOXAV_ERR_CALL_SYNC;
goto RETURN;
}
call->msi_call->user_data = call;
RETURN:
pthread_mutex_unlock(av->mutex);
if (error != nullptr) {
*error = rc;
}
return rc == TOXAV_ERR_CALL_OK;
}
void toxav_callback_call(ToxAV *av, toxav_call_cb *callback, void *user_data)
{
pthread_mutex_lock(av->mutex);
av->ccb = callback;
av->ccb_user_data = user_data;
pthread_mutex_unlock(av->mutex);
}
bool toxav_answer(ToxAV *av, Tox_Friend_Number friend_number, uint32_t audio_bit_rate, uint32_t video_bit_rate,
Toxav_Err_Answer *error)
{
pthread_mutex_lock(av->mutex);
Toxav_Err_Answer rc = TOXAV_ERR_ANSWER_OK;
ToxAVCall *call;
if (!tox_friend_exists(av->tox, friend_number)) {
rc = TOXAV_ERR_ANSWER_FRIEND_NOT_FOUND;
goto RETURN;
}
if ((audio_bit_rate != 0 && audio_bit_rate_invalid(audio_bit_rate))
|| (video_bit_rate != 0 && video_bit_rate_invalid(video_bit_rate))
) {
rc = TOXAV_ERR_ANSWER_INVALID_BIT_RATE;
goto RETURN;
}
call = call_get(av, friend_number);
if (call == nullptr) {
rc = TOXAV_ERR_ANSWER_FRIEND_NOT_CALLING;
goto RETURN;
}
if (!call_prepare_transmission(call)) {
rc = TOXAV_ERR_ANSWER_CODEC_INITIALIZATION;
goto RETURN;
}
call->audio_bit_rate = audio_bit_rate;
call->video_bit_rate = video_bit_rate;
call->previous_self_capabilities = MSI_CAP_R_AUDIO | MSI_CAP_R_VIDEO;
call->previous_self_capabilities |= audio_bit_rate > 0 ? MSI_CAP_S_AUDIO : 0;
call->previous_self_capabilities |= video_bit_rate > 0 ? MSI_CAP_S_VIDEO : 0;
if (msi_answer(av->log, call->msi_call, call->previous_self_capabilities) != 0) {
rc = TOXAV_ERR_ANSWER_SYNC;
}
RETURN:
pthread_mutex_unlock(av->mutex);
if (error != nullptr) {
*error = rc;
}
return rc == TOXAV_ERR_ANSWER_OK;
}
void toxav_callback_call_state(ToxAV *av, toxav_call_state_cb *callback, void *user_data)
{
pthread_mutex_lock(av->mutex);
av->scb = callback;
av->scb_user_data = user_data;
pthread_mutex_unlock(av->mutex);
}
static Toxav_Err_Call_Control call_control_handle_resume(const ToxAVCall *call)
{
/* Only act if paused and had media transfer active before */
if (call->msi_call->self_capabilities != 0 || call->previous_self_capabilities == 0) {
return TOXAV_ERR_CALL_CONTROL_INVALID_TRANSITION;
}
if (msi_change_capabilities(call->av->log, call->msi_call,
call->previous_self_capabilities) == -1) {
return TOXAV_ERR_CALL_CONTROL_SYNC;
}
rtp_allow_receiving_mark(call->audio_rtp);
rtp_allow_receiving_mark(call->video_rtp);
return TOXAV_ERR_CALL_CONTROL_OK;
}
static Toxav_Err_Call_Control call_control_handle_pause(ToxAVCall *call)
{
/* Only act if not already paused */
if (call->msi_call->self_capabilities == 0) {
return TOXAV_ERR_CALL_CONTROL_INVALID_TRANSITION;
}
call->previous_self_capabilities = call->msi_call->self_capabilities;
if (msi_change_capabilities(call->av->log, call->msi_call, 0) == -1) {
return TOXAV_ERR_CALL_CONTROL_SYNC;
}
rtp_stop_receiving_mark(call->audio_rtp);
rtp_stop_receiving_mark(call->video_rtp);
return TOXAV_ERR_CALL_CONTROL_OK;
}
static Toxav_Err_Call_Control call_control_handle_cancel(ToxAVCall *call)
{
/* Hang up */
pthread_mutex_lock(call->toxav_call_mutex);
if (msi_hangup(call->av->log, call->msi_call) != 0) {
pthread_mutex_unlock(call->toxav_call_mutex);
return TOXAV_ERR_CALL_CONTROL_SYNC;
}
call->msi_call = nullptr;
pthread_mutex_unlock(call->toxav_call_mutex);
/* No matter the case, terminate the call */
call_kill_transmission(call);
call_remove(call);
return TOXAV_ERR_CALL_CONTROL_OK;
}
static Toxav_Err_Call_Control call_control_handle_mute_audio(const ToxAVCall *call)
{
if ((call->msi_call->self_capabilities & MSI_CAP_R_AUDIO) == 0) {
return TOXAV_ERR_CALL_CONTROL_INVALID_TRANSITION;
}
if (msi_change_capabilities(call->av->log, call->msi_call, call->
msi_call->self_capabilities ^ MSI_CAP_R_AUDIO) == -1) {
return TOXAV_ERR_CALL_CONTROL_SYNC;
}
rtp_stop_receiving_mark(call->audio_rtp);
return TOXAV_ERR_CALL_CONTROL_OK;
}
static Toxav_Err_Call_Control call_control_handle_unmute_audio(const ToxAVCall *call)
{
if ((call->msi_call->self_capabilities ^ MSI_CAP_R_AUDIO) == 0) {
return TOXAV_ERR_CALL_CONTROL_INVALID_TRANSITION;
}
if (msi_change_capabilities(call->av->log, call->msi_call, call->
msi_call->self_capabilities | MSI_CAP_R_AUDIO) == -1) {
return TOXAV_ERR_CALL_CONTROL_SYNC;
}
rtp_allow_receiving_mark(call->audio_rtp);
return TOXAV_ERR_CALL_CONTROL_OK;
}
static Toxav_Err_Call_Control call_control_handle_hide_video(const ToxAVCall *call)
{
if ((call->msi_call->self_capabilities & MSI_CAP_R_VIDEO) == 0) {
return TOXAV_ERR_CALL_CONTROL_INVALID_TRANSITION;
}
if (msi_change_capabilities(call->av->log, call->msi_call, call->
msi_call->self_capabilities ^ MSI_CAP_R_VIDEO) == -1) {
return TOXAV_ERR_CALL_CONTROL_SYNC;
}
rtp_stop_receiving_mark(call->video_rtp);
return TOXAV_ERR_CALL_CONTROL_OK;
}
static Toxav_Err_Call_Control call_control_handle_show_video(const ToxAVCall *call)
{
if ((call->msi_call->self_capabilities ^ MSI_CAP_R_VIDEO) == 0) {
return TOXAV_ERR_CALL_CONTROL_INVALID_TRANSITION;
}
if (msi_change_capabilities(call->av->log, call->msi_call, call->
msi_call->self_capabilities | MSI_CAP_R_VIDEO) == -1) {
return TOXAV_ERR_CALL_CONTROL_SYNC;
}
rtp_allow_receiving_mark(call->video_rtp);
return TOXAV_ERR_CALL_CONTROL_OK;
}
static Toxav_Err_Call_Control call_control_handle(ToxAVCall *call, Toxav_Call_Control control)
{
switch (control) {
case TOXAV_CALL_CONTROL_RESUME:
return call_control_handle_resume(call);
case TOXAV_CALL_CONTROL_PAUSE:
return call_control_handle_pause(call);
case TOXAV_CALL_CONTROL_CANCEL:
return call_control_handle_cancel(call);
case TOXAV_CALL_CONTROL_MUTE_AUDIO:
return call_control_handle_mute_audio(call);
case TOXAV_CALL_CONTROL_UNMUTE_AUDIO:
return call_control_handle_unmute_audio(call);
case TOXAV_CALL_CONTROL_HIDE_VIDEO:
return call_control_handle_hide_video(call);
case TOXAV_CALL_CONTROL_SHOW_VIDEO:
return call_control_handle_show_video(call);
}
return TOXAV_ERR_CALL_CONTROL_INVALID_TRANSITION;
}
static Toxav_Err_Call_Control call_control(ToxAV *av, Tox_Friend_Number friend_number, Toxav_Call_Control control)
{
if (!tox_friend_exists(av->tox, friend_number)) {
return TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_FOUND;
}
ToxAVCall *call = call_get(av, friend_number);
if (call == nullptr || (!call->active && control != TOXAV_CALL_CONTROL_CANCEL)) {
return TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
}
return call_control_handle(call, control);
}
bool toxav_call_control(ToxAV *av, Tox_Friend_Number friend_number, Toxav_Call_Control control, Toxav_Err_Call_Control *error)
{
pthread_mutex_lock(av->mutex);
const Toxav_Err_Call_Control rc = call_control(av, friend_number, control);
pthread_mutex_unlock(av->mutex);
if (error != nullptr) {
*error = rc;
}
return rc == TOXAV_ERR_CALL_CONTROL_OK;
}
bool toxav_audio_set_bit_rate(ToxAV *av, Tox_Friend_Number friend_number, uint32_t bit_rate,
Toxav_Err_Bit_Rate_Set *error)
{
Toxav_Err_Bit_Rate_Set rc = TOXAV_ERR_BIT_RATE_SET_OK;
ToxAVCall *call;
if (!tox_friend_exists(av->tox, friend_number)) {
rc = TOXAV_ERR_BIT_RATE_SET_FRIEND_NOT_FOUND;
goto RETURN;
}
if (bit_rate > 0 && audio_bit_rate_invalid(bit_rate)) {
rc = TOXAV_ERR_BIT_RATE_SET_INVALID_BIT_RATE;
goto RETURN;
}
pthread_mutex_lock(av->mutex);
call = call_get(av, friend_number);
if (call == nullptr || !call->active || call->msi_call->state != MSI_CALL_ACTIVE) {
pthread_mutex_unlock(av->mutex);
rc = TOXAV_ERR_BIT_RATE_SET_FRIEND_NOT_IN_CALL;
goto RETURN;
}
LOGGER_DEBUG(av->log, "Setting new audio bitrate to: %u", bit_rate);
if (call->audio_bit_rate == bit_rate) {
LOGGER_DEBUG(av->log, "Audio bitrate already set to: %u", bit_rate);
} else if (bit_rate == 0) {
LOGGER_DEBUG(av->log, "Turned off audio sending");
if (msi_change_capabilities(av->log, call->msi_call, call->msi_call->
self_capabilities ^ MSI_CAP_S_AUDIO) != 0) {
pthread_mutex_unlock(av->mutex);
rc = TOXAV_ERR_BIT_RATE_SET_SYNC;
goto RETURN;
}
/* Audio sending is turned off; notify peer */
call->audio_bit_rate = 0;
} else {
pthread_mutex_lock(call->toxav_call_mutex);
if (call->audio_bit_rate == 0) {
LOGGER_DEBUG(av->log, "Turned on audio sending");
/* The audio has been turned off before this */
if (msi_change_capabilities(av->log, call->msi_call, call->
msi_call->self_capabilities | MSI_CAP_S_AUDIO) != 0) {
pthread_mutex_unlock(call->toxav_call_mutex);
pthread_mutex_unlock(av->mutex);
rc = TOXAV_ERR_BIT_RATE_SET_SYNC;
goto RETURN;
}
} else {
LOGGER_DEBUG(av->log, "Set new audio bit rate %u", bit_rate);
}
call->audio_bit_rate = bit_rate;
pthread_mutex_unlock(call->toxav_call_mutex);
}
pthread_mutex_unlock(av->mutex);
RETURN:
if (error != nullptr) {
*error = rc;
}
return rc == TOXAV_ERR_BIT_RATE_SET_OK;
}
bool toxav_video_set_bit_rate(ToxAV *av, Tox_Friend_Number friend_number, uint32_t bit_rate,
Toxav_Err_Bit_Rate_Set *error)
{
Toxav_Err_Bit_Rate_Set rc = TOXAV_ERR_BIT_RATE_SET_OK;
ToxAVCall *call;
if (!tox_friend_exists(av->tox, friend_number)) {
rc = TOXAV_ERR_BIT_RATE_SET_FRIEND_NOT_FOUND;
goto RETURN;
}
if (bit_rate > 0 && video_bit_rate_invalid(bit_rate)) {
rc = TOXAV_ERR_BIT_RATE_SET_INVALID_BIT_RATE;
goto RETURN;
}
pthread_mutex_lock(av->mutex);
call = call_get(av, friend_number);
if (call == nullptr || !call->active || call->msi_call->state != MSI_CALL_ACTIVE) {
pthread_mutex_unlock(av->mutex);
rc = TOXAV_ERR_BIT_RATE_SET_FRIEND_NOT_IN_CALL;
goto RETURN;
}
LOGGER_DEBUG(av->log, "Setting new video bitrate to: %u", bit_rate);
if (call->video_bit_rate == bit_rate) {
LOGGER_DEBUG(av->log, "Video bitrate already set to: %u", bit_rate);
} else if (bit_rate == 0) {
LOGGER_DEBUG(av->log, "Turned off video sending");
/* Video sending is turned off; notify peer */
if (msi_change_capabilities(av->log, call->msi_call, call->msi_call->
self_capabilities ^ MSI_CAP_S_VIDEO) != 0) {
pthread_mutex_unlock(av->mutex);
rc = TOXAV_ERR_BIT_RATE_SET_SYNC;
goto RETURN;
}
call->video_bit_rate = 0;
} else {
pthread_mutex_lock(call->toxav_call_mutex);
if (call->video_bit_rate == 0) {
LOGGER_DEBUG(av->log, "Turned on video sending");
/* The video has been turned off before this */
if (msi_change_capabilities(av->log, call->msi_call, call->
msi_call->self_capabilities | MSI_CAP_S_VIDEO) != 0) {
pthread_mutex_unlock(call->toxav_call_mutex);
pthread_mutex_unlock(av->mutex);
rc = TOXAV_ERR_BIT_RATE_SET_SYNC;
goto RETURN;
}
} else {
LOGGER_DEBUG(av->log, "Set new video bit rate %u", bit_rate);
}
call->video_bit_rate = bit_rate;
pthread_mutex_unlock(call->toxav_call_mutex);
}
pthread_mutex_unlock(av->mutex);
RETURN:
if (error != nullptr) {
*error = rc;
}
return rc == TOXAV_ERR_BIT_RATE_SET_OK;
}
void toxav_callback_audio_bit_rate(ToxAV *av, toxav_audio_bit_rate_cb *callback, void *user_data)
{
pthread_mutex_lock(av->mutex);
av->abcb = callback;
av->abcb_user_data = user_data;
pthread_mutex_unlock(av->mutex);
}
void toxav_callback_video_bit_rate(ToxAV *av, toxav_video_bit_rate_cb *callback, void *user_data)
{
pthread_mutex_lock(av->mutex);
av->vbcb = callback;
av->vbcb_user_data = user_data;
pthread_mutex_unlock(av->mutex);
}
bool toxav_audio_send_frame(ToxAV *av, Tox_Friend_Number friend_number, const int16_t pcm[], size_t sample_count,
uint8_t channels, uint32_t sampling_rate, Toxav_Err_Send_Frame *error)
{
Toxav_Err_Send_Frame rc = TOXAV_ERR_SEND_FRAME_OK;
ToxAVCall *call;
if (!tox_friend_exists(av->tox, friend_number)) {
rc = TOXAV_ERR_SEND_FRAME_FRIEND_NOT_FOUND;
goto RETURN;
}
if (pthread_mutex_trylock(av->mutex) != 0) {
rc = TOXAV_ERR_SEND_FRAME_SYNC;
goto RETURN;
}
call = call_get(av, friend_number);
if (call == nullptr || !call->active || call->msi_call->state != MSI_CALL_ACTIVE) {
pthread_mutex_unlock(av->mutex);
rc = TOXAV_ERR_SEND_FRAME_FRIEND_NOT_IN_CALL;
goto RETURN;
}
if (call->audio_bit_rate == 0 ||
(call->msi_call->self_capabilities & MSI_CAP_S_AUDIO) == 0 ||
(call->msi_call->peer_capabilities & MSI_CAP_R_AUDIO) == 0) {
pthread_mutex_unlock(av->mutex);
rc = TOXAV_ERR_SEND_FRAME_PAYLOAD_TYPE_DISABLED;
goto RETURN;
}
pthread_mutex_lock(call->mutex_audio);
pthread_mutex_unlock(av->mutex);
if (pcm == nullptr) {
pthread_mutex_unlock(call->mutex_audio);
rc = TOXAV_ERR_SEND_FRAME_NULL;
goto RETURN;
}
if (channels > 2) {
pthread_mutex_unlock(call->mutex_audio);
rc = TOXAV_ERR_SEND_FRAME_INVALID;
goto RETURN;
}
{ /* Encode and send */
if (ac_reconfigure_encoder(call->audio, call->audio_bit_rate * 1000, sampling_rate, channels) != 0) {
pthread_mutex_unlock(call->mutex_audio);
rc = TOXAV_ERR_SEND_FRAME_INVALID;
goto RETURN;
}
/* This is more than enough always */
const uint16_t dest_size = sample_count + sizeof(sampling_rate);
VLA(uint8_t, dest, dest_size);
sampling_rate = net_htonl(sampling_rate);
memcpy(dest, &sampling_rate, sizeof(sampling_rate));
const int vrc = ac_encode(call->audio, pcm, sample_count,
dest + sizeof(sampling_rate), dest_size - sizeof(sampling_rate));
if (vrc < 0) {
pthread_mutex_unlock(call->mutex_audio);
rc = TOXAV_ERR_SEND_FRAME_INVALID;
goto RETURN;
}
if (rtp_send_data(av->log, call->audio_rtp, dest, vrc + sizeof(sampling_rate), false) != 0) {
LOGGER_WARNING(av->log, "Failed to send audio packet");
rc = TOXAV_ERR_SEND_FRAME_RTP_FAILED;
}
}
pthread_mutex_unlock(call->mutex_audio);
RETURN:
if (error != nullptr) {
*error = rc;
}
return rc == TOXAV_ERR_SEND_FRAME_OK;
}
static Toxav_Err_Send_Frame send_frames(const ToxAV *av, ToxAVCall *call)
{
uint8_t *data;
uint32_t size;
bool is_keyframe;
while (vc_get_cx_data(call->video, &data, &size, &is_keyframe)) {
const int res = rtp_send_data(
av->log,
call->video_rtp,
data,
size,
is_keyframe);
if (res < 0) {
Net_Strerror error_str;
LOGGER_WARNING(av->log, "Could not send video frame: %s", net_strerror(net_error(), &error_str));
return TOXAV_ERR_SEND_FRAME_RTP_FAILED;
}
}
return TOXAV_ERR_SEND_FRAME_OK;
}
bool toxav_video_send_frame(ToxAV *av, Tox_Friend_Number friend_number, uint16_t width, uint16_t height,
const uint8_t y[], const uint8_t u[], const uint8_t v[], Toxav_Err_Send_Frame *error)
{
Toxav_Err_Send_Frame rc = TOXAV_ERR_SEND_FRAME_OK;
ToxAVCall *call;
int video_encode_flags = 0;
if (!tox_friend_exists(av->tox, friend_number)) {
rc = TOXAV_ERR_SEND_FRAME_FRIEND_NOT_FOUND;
goto RETURN;
}
if (pthread_mutex_trylock(av->mutex) != 0) {
rc = TOXAV_ERR_SEND_FRAME_SYNC;
goto RETURN;
}
call = call_get(av, friend_number);
if (call == nullptr || !call->active || call->msi_call->state != MSI_CALL_ACTIVE) {
pthread_mutex_unlock(av->mutex);
rc = TOXAV_ERR_SEND_FRAME_FRIEND_NOT_IN_CALL;
goto RETURN;
}
if (call->video_bit_rate == 0 ||
(call->msi_call->self_capabilities & MSI_CAP_S_VIDEO) == 0 ||
(call->msi_call->peer_capabilities & MSI_CAP_R_VIDEO) == 0) {
pthread_mutex_unlock(av->mutex);
rc = TOXAV_ERR_SEND_FRAME_PAYLOAD_TYPE_DISABLED;
goto RETURN;
}
pthread_mutex_lock(call->mutex_video);
pthread_mutex_unlock(av->mutex);
if (y == nullptr || u == nullptr || v == nullptr) {
pthread_mutex_unlock(call->mutex_video);
rc = TOXAV_ERR_SEND_FRAME_NULL;
goto RETURN;
}
if (vc_reconfigure_encoder(call->video, call->video_bit_rate, width, height, -1) != 0) {
pthread_mutex_unlock(call->mutex_video);
rc = TOXAV_ERR_SEND_FRAME_INVALID;
goto RETURN;
}
// we start with I-frames (full frames) and then switch to normal mode later
if (rtp_session_get_ssrc(call->video_rtp) < VIDEO_SEND_X_KEYFRAMES_FIRST) {
// Key frame flag for first frames
video_encode_flags = VC_EFLAG_FORCE_KF;
LOGGER_DEBUG(av->log, "I_FRAME_FLAG:%u only-i-frame mode", rtp_session_get_ssrc(call->video_rtp));
rtp_session_set_ssrc(call->video_rtp, rtp_session_get_ssrc(call->video_rtp) + 1);
} else if (rtp_session_get_ssrc(call->video_rtp) == VIDEO_SEND_X_KEYFRAMES_FIRST) {
// normal keyframe placement
video_encode_flags = VC_EFLAG_NONE;
LOGGER_DEBUG(av->log, "I_FRAME_FLAG:%u normal mode", rtp_session_get_ssrc(call->video_rtp));
rtp_session_set_ssrc(call->video_rtp, rtp_session_get_ssrc(call->video_rtp) + 1);
}
if (vc_encode(call->video, width, height, y, u, v, video_encode_flags) != 0) {
pthread_mutex_unlock(call->mutex_video);
rc = TOXAV_ERR_SEND_FRAME_INVALID;
goto RETURN;
}
vc_increment_frame_counter(call->video);
rc = send_frames(av, call);
pthread_mutex_unlock(call->mutex_video);
RETURN:
if (error != nullptr) {
*error = rc;
}
return rc == TOXAV_ERR_SEND_FRAME_OK;
}
void toxav_callback_audio_receive_frame(ToxAV *av, toxav_audio_receive_frame_cb *callback, void *user_data)
{
pthread_mutex_lock(av->mutex);
av->acb = callback;
av->acb_user_data = user_data;
if (av->calls != nullptr) {
for (ToxAVCall *i = av->calls[av->calls_head]; i != nullptr; i = i->next) {
pthread_mutex_lock(i->toxav_call_mutex);
i->acb = callback;
i->acb_user_data = user_data;
pthread_mutex_unlock(i->toxav_call_mutex);
}
}
pthread_mutex_unlock(av->mutex);
}
void toxav_callback_video_receive_frame(ToxAV *av, toxav_video_receive_frame_cb *callback, void *user_data)
{
pthread_mutex_lock(av->mutex);
av->vcb = callback;
av->vcb_user_data = user_data;
pthread_mutex_unlock(av->mutex);
}
/*******************************************************************************
*
* :: Internal
*
******************************************************************************/
static void callback_bwc(BWController *bwc, Tox_Friend_Number friend_number, float loss, void *user_data)
{
/* Callback which is called when the internal measure mechanism reported packet loss.
* We report suggested lowered bitrate to an app. If app is sending both audio and video,
* we will report lowered bitrate for video only because in that case video probably
* takes more than 90% bandwidth. Otherwise, we report lowered bitrate on audio.
* The application may choose to disable video totally if the stream is too bad.
*/
ToxAVCall *call = (ToxAVCall *)user_data;
assert(call != nullptr);
LOGGER_DEBUG(call->av->log, "Reported loss of %f%%", (double)loss * 100);
/* if less than 10% data loss we do nothing! */
if (loss < 0.1F) {
return;
}
pthread_mutex_lock(call->av->mutex);
if (call->video_bit_rate != 0) {
if (call->av->vbcb == nullptr) {
pthread_mutex_unlock(call->av->mutex);
LOGGER_WARNING(call->av->log, "No callback to report loss on");
return;
}
call->av->vbcb(call->av, friend_number,
call->video_bit_rate - (call->video_bit_rate * loss),
call->av->vbcb_user_data);
} else if (call->audio_bit_rate != 0) {
if (call->av->abcb == nullptr) {
pthread_mutex_unlock(call->av->mutex);
LOGGER_WARNING(call->av->log, "No callback to report loss on");
return;
}
call->av->abcb(call->av, friend_number,
call->audio_bit_rate - (call->audio_bit_rate * loss),
call->av->abcb_user_data);
}
pthread_mutex_unlock(call->av->mutex);
}
static int callback_invite(void *object, MSICall *call)
{
ToxAV *toxav = (ToxAV *)object;
pthread_mutex_lock(toxav->mutex);
ToxAVCall *av_call = call_new(toxav, call->friend_number, nullptr);
if (av_call == nullptr) {
LOGGER_WARNING(toxav->log, "Failed to initialize call...");
pthread_mutex_unlock(toxav->mutex);
return -1;
}
call->user_data = av_call;
av_call->msi_call = call;
if (toxav->ccb != nullptr) {
toxav->ccb(toxav, call->friend_number, call->peer_capabilities & MSI_CAP_S_AUDIO,
call->peer_capabilities & MSI_CAP_S_VIDEO, toxav->ccb_user_data);
} else {
/* No handler to capture the call request, send failure */
pthread_mutex_unlock(toxav->mutex);
return -1;
}
pthread_mutex_unlock(toxav->mutex);
return 0;
}
static int callback_start(void *object, MSICall *call)
{
ToxAV *toxav = (ToxAV *)object;
pthread_mutex_lock(toxav->mutex);
ToxAVCall *av_call = call_get(toxav, call->friend_number);
if (av_call == nullptr) {
/* Should this ever happen? */
pthread_mutex_unlock(toxav->mutex);
return -1;
}
if (!call_prepare_transmission(av_call)) {
callback_error(toxav, call);
pthread_mutex_unlock(toxav->mutex);
return -1;
}
if (!invoke_call_state_callback(toxav, call->friend_number, call->peer_capabilities)) {
callback_error(toxav, call);
pthread_mutex_unlock(toxav->mutex);
return -1;
}
pthread_mutex_unlock(toxav->mutex);
return 0;
}
static int callback_end(void *object, MSICall *call)
{
ToxAV *toxav = (ToxAV *)object;
pthread_mutex_lock(toxav->mutex);
invoke_call_state_callback(toxav, call->friend_number, TOXAV_FRIEND_CALL_STATE_FINISHED);
if (call->user_data != nullptr) {
call_kill_transmission((ToxAVCall *)call->user_data);
call_remove((ToxAVCall *)call->user_data);
}
pthread_mutex_unlock(toxav->mutex);
return 0;
}
static int callback_error(void *object, MSICall *call)
{
ToxAV *toxav = (ToxAV *)object;
pthread_mutex_lock(toxav->mutex);
invoke_call_state_callback(toxav, call->friend_number, TOXAV_FRIEND_CALL_STATE_ERROR);
if (call->user_data != nullptr) {
call_kill_transmission((ToxAVCall *)call->user_data);
call_remove((ToxAVCall *)call->user_data);
}
pthread_mutex_unlock(toxav->mutex);
return 0;
}
static int callback_capabilities(void *object, MSICall *call)
{
ToxAV *toxav = (ToxAV *)object;
pthread_mutex_lock(toxav->mutex);
ToxAVCall *av_call = (ToxAVCall *)call->user_data;
if ((call->peer_capabilities & MSI_CAP_S_AUDIO) != 0) {
rtp_allow_receiving_mark(av_call->audio_rtp);
} else {
rtp_stop_receiving_mark(av_call->audio_rtp);
}
if ((call->peer_capabilities & MSI_CAP_S_VIDEO) != 0) {
rtp_allow_receiving_mark(av_call->video_rtp);
} else {
rtp_stop_receiving_mark(av_call->video_rtp);
}
invoke_call_state_callback(toxav, call->friend_number, call->peer_capabilities);
pthread_mutex_unlock(toxav->mutex);
return 0;
}
static bool audio_bit_rate_invalid(uint32_t bit_rate)
{
/* Opus RFC 6716 section-2.1.1 dictates the following:
* Opus supports all bit rates from 6 kbit/s to 510 kbit/s.
*/
return bit_rate < 6 || bit_rate > 510;
}
static bool video_bit_rate_invalid(uint32_t bit_rate)
{
/* Cap the target rate to 1000 Mbps to avoid some integer overflows in
* target bandwidth calculations.
* https://github.com/webmproject/libvpx/blob/027bbee30a0103b99d86327b48d29567fed11688/vp8/vp8_cx_iface.c#L350-L352
*/
return bit_rate > 1000000;
}
static bool invoke_call_state_callback(ToxAV *av, Tox_Friend_Number friend_number, uint32_t state)
{
if (av->scb != nullptr) {
av->scb(av, friend_number, state, av->scb_user_data);
} else {
return false;
}
return true;
}
static ToxAVCall *call_new(ToxAV *av, Tox_Friend_Number friend_number, Toxav_Err_Call *error)
{
/* Assumes mutex locked */
Toxav_Err_Call rc = TOXAV_ERR_CALL_OK;
ToxAVCall *call = nullptr;
Tox_Err_Friend_Query f_con_query_error;
Tox_Connection f_con_status = TOX_CONNECTION_NONE;
if (!tox_friend_exists(av->tox, friend_number)) {
rc = TOXAV_ERR_CALL_FRIEND_NOT_FOUND;
goto RETURN;
}
f_con_status = tox_friend_get_connection_status(av->tox, friend_number, &f_con_query_error);
if (f_con_status == TOX_CONNECTION_NONE) {
rc = TOXAV_ERR_CALL_FRIEND_NOT_CONNECTED;
goto RETURN;
}
if (call_get(av, friend_number) != nullptr) {
rc = TOXAV_ERR_CALL_FRIEND_ALREADY_IN_CALL;
goto RETURN;
}
call = (ToxAVCall *)calloc(1, sizeof(ToxAVCall));
if (call == nullptr) {
rc = TOXAV_ERR_CALL_MALLOC;
goto RETURN;
}
call->av = av;
call->friend_number = friend_number;
if (create_recursive_mutex(call->toxav_call_mutex) != 0) {
free(call);
call = nullptr;
rc = TOXAV_ERR_CALL_MALLOC;
goto RETURN;
}
if (av->calls == nullptr) { /* Creating */
av->calls = (ToxAVCall **)calloc(friend_number + 1, sizeof(ToxAVCall *));
if (av->calls == nullptr) {
pthread_mutex_destroy(call->toxav_call_mutex);
free(call);
call = nullptr;
rc = TOXAV_ERR_CALL_MALLOC;
goto RETURN;
}
av->calls_tail = friend_number;
av->calls_head = friend_number;
} else if (av->calls_tail < friend_number) { /* Appending */
ToxAVCall **tmp = (ToxAVCall **)realloc(av->calls, (friend_number + 1) * sizeof(ToxAVCall *));
if (tmp == nullptr) {
pthread_mutex_destroy(call->toxav_call_mutex);
free(call);
call = nullptr;
rc = TOXAV_ERR_CALL_MALLOC;
goto RETURN;
}
av->calls = tmp;
/* Set fields in between to null */
for (uint32_t i = av->calls_tail + 1; i < friend_number; ++i) {
av->calls[i] = nullptr;
}
call->prev = av->calls[av->calls_tail];
av->calls[av->calls_tail]->next = call;
av->calls_tail = friend_number;
} else if (av->calls_head > friend_number) { /* Inserting at front */
call->next = av->calls[av->calls_head];
av->calls[av->calls_head]->prev = call;
av->calls_head = friend_number;
}
av->calls[friend_number] = call;
RETURN:
if (error != nullptr) {
*error = rc;
}
return call;
}
static ToxAVCall *call_remove(ToxAVCall *call)
{
if (call == nullptr) {
return nullptr;
}
const uint32_t friend_number = call->friend_number;
ToxAV *av = call->av;
ToxAVCall *prev = call->prev;
ToxAVCall *next = call->next;
/* Set av call in msi to NULL in order to know if call if ToxAVCall is
* removed from the msi call.
*/
if (call->msi_call != nullptr) {
call->msi_call->user_data = nullptr;
}
pthread_mutex_destroy(call->toxav_call_mutex);
free(call);
if (prev != nullptr) {
prev->next = next;
} else if (next != nullptr) {
av->calls_head = next->friend_number;
} else {
goto CLEAR;
}
if (next != nullptr) {
next->prev = prev;
} else if (prev != nullptr) {
av->calls_tail = prev->friend_number;
} else {
goto CLEAR;
}
av->calls[friend_number] = nullptr;
return next;
CLEAR:
av->calls_head = 0;
av->calls_tail = 0;
free(av->calls);
av->calls = nullptr;
return nullptr;
}
static bool call_prepare_transmission(ToxAVCall *call)
{
/* Assumes mutex locked */
if (call == nullptr) {
return false;
}
ToxAV *av = call->av;
if (av->acb == nullptr && av->vcb == nullptr) {
/* It makes no sense to have CSession without callbacks */
return false;
}
if (call->active) {
LOGGER_WARNING(av->log, "Call already active!");
return true;
}
if (create_recursive_mutex(call->mutex_audio) != 0) {
return false;
}
if (create_recursive_mutex(call->mutex_video) != 0) {
goto FAILURE_2;
}
/* Prepare bwc */
call->bwc = bwc_new(av->log, call->friend_number, callback_bwc, call, rtp_send_packet, call, av->toxav_mono_time);
{ /* Prepare audio */
call->acb = av->acb;
call->acb_user_data = av->acb_user_data;
call->audio = ac_new(av->toxav_mono_time, av->log, call->friend_number, handle_audio_frame, call);
if (call->audio == nullptr) {
LOGGER_ERROR(av->log, "Failed to create audio codec session");
goto FAILURE;
}
call->audio_rtp = rtp_new(av->log, RTP_TYPE_AUDIO, av->toxav_mono_time,
rtp_send_packet, call,
rtp_add_recv, rtp_add_lost, call->bwc,
call->audio, ac_queue_message);
if (call->audio_rtp == nullptr) {
LOGGER_ERROR(av->log, "Failed to create audio rtp session");
goto FAILURE;
}
}
{ /* Prepare video */
call->video = vc_new(av->log, av->toxav_mono_time, call->friend_number, handle_video_frame, call);
if (call->video == nullptr) {
LOGGER_ERROR(av->log, "Failed to create video codec session");
goto FAILURE;
}
call->video_rtp = rtp_new(av->log, RTP_TYPE_VIDEO, av->toxav_mono_time,
rtp_send_packet, call,
rtp_add_recv, rtp_add_lost, call->bwc,
call->video, vc_queue_message);
if (call->video_rtp == nullptr) {
LOGGER_ERROR(av->log, "Failed to create video rtp session");
goto FAILURE;
}
}
call->active = true;
return true;
FAILURE:
bwc_kill(call->bwc);
rtp_kill(av->log, call->audio_rtp);
ac_kill(call->audio);
call->audio_rtp = nullptr;
call->audio = nullptr;
rtp_kill(av->log, call->video_rtp);
vc_kill(call->video);
call->video_rtp = nullptr;
call->video = nullptr;
pthread_mutex_destroy(call->mutex_video);
FAILURE_2:
pthread_mutex_destroy(call->mutex_audio);
return false;
}
static void call_kill_transmission(ToxAVCall *call)
{
if (call == nullptr || !call->active) {
return;
}
call->active = false;
pthread_mutex_lock(call->mutex_audio);
pthread_mutex_unlock(call->mutex_audio);
pthread_mutex_lock(call->mutex_video);
pthread_mutex_unlock(call->mutex_video);
pthread_mutex_lock(call->toxav_call_mutex);
pthread_mutex_unlock(call->toxav_call_mutex);
bwc_kill(call->bwc);
const ToxAV *av = call->av;
rtp_kill(av->log, call->audio_rtp);
ac_kill(call->audio);
call->audio_rtp = nullptr;
call->audio = nullptr;
rtp_kill(av->log, call->video_rtp);
vc_kill(call->video);
call->video_rtp = nullptr;
call->video = nullptr;
pthread_mutex_destroy(call->mutex_audio);
pthread_mutex_destroy(call->mutex_video);
}
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