/**
* netplay_load_savestate
* @netplay : pointer to netplay object
* @serial_info : the savestate being loaded, NULL means
* "load it yourself"
* @save : Whether to save the provided serial_info
* into the frame buffer
*
* Inform Netplay of a savestate load and send it to the other side
**/
void netplay_load_savestate(netplay_t *netplay,
retro_ctx_serialize_info_t *serial_info, bool save)
{
retro_ctx_serialize_info_t tmp_serial_info;
netplay_force_future(netplay);
/* Record it in our own buffer */
if (save || !serial_info)
{
if (netplay_delta_frame_ready(netplay,
&netplay->buffer[netplay->run_ptr], netplay->run_frame_count))
{
if (!serial_info)
{
tmp_serial_info.size = netplay->state_size;
tmp_serial_info.data = netplay->buffer[netplay->run_ptr].state;
if (!core_serialize(&tmp_serial_info))
return;
tmp_serial_info.data_const = tmp_serial_info.data;
serial_info = &tmp_serial_info;
}
else
{
if (serial_info->size <= netplay->state_size)
{
memcpy(netplay->buffer[netplay->run_ptr].state,
serial_info->data_const, serial_info->size);
}
}
}
else
{
/* FIXME: This is a critical failure! */
return;
}
}
/* Don't send it if we're expected to be desynced */
if (netplay->desync)
return;
/* If we can't send it to the peer, loading a state was a bad idea */
if (netplay->quirks & (
NETPLAY_QUIRK_NO_SAVESTATES
| NETPLAY_QUIRK_NO_TRANSMISSION))
return;
/* Send this to every peer */
if (netplay->compress_nil.compression_backend)
netplay_send_savestate(netplay, serial_info, 0, &netplay->compress_nil);
if (netplay->compress_zlib.compression_backend)
netplay_send_savestate(netplay, serial_info, NETPLAY_COMPRESSION_ZLIB,
&netplay->compress_zlib);
}
/**
* pre_frame:
* @netplay : pointer to netplay object
*
* Pre-frame for Netplay (normal version).
**/
static void netplay_net_pre_frame(netplay_t *netplay)
{
retro_ctx_serialize_info_t serial_info;
serial_info.data = netplay->buffer[netplay->self_ptr].state;
serial_info.size = netplay->state_size;
core_serialize(&serial_info);
netplay->can_poll = true;
input_poll_net();
}
void state_manager_event_init(void)
{
retro_ctx_serialize_info_t serial_info;
retro_ctx_size_info_t info;
void *state = NULL;
settings_t *settings = config_get_ptr();
if (!settings->rewind_enable || rewind_state.state)
return;
if (audio_driver_has_callback())
{
RARCH_ERR("%s.\n", msg_hash_to_str(MSG_REWIND_INIT_FAILED));
return;
}
core_serialize_size(&info);
rewind_state.size = info.size;
if (!rewind_state.size)
{
RARCH_ERR("%s.\n",
msg_hash_to_str(MSG_REWIND_INIT_FAILED_THREADED_AUDIO));
return;
}
RARCH_LOG("%s: %u MB\n",
msg_hash_to_str(MSG_REWIND_INIT),
(unsigned)(settings->rewind_buffer_size / 1000000));
rewind_state.state = state_manager_new(rewind_state.size,
settings->rewind_buffer_size);
if (!rewind_state.state)
RARCH_WARN("%s.\n", msg_hash_to_str(MSG_REWIND_INIT_FAILED));
state_manager_push_where(rewind_state.state, &state);
serial_info.data = state;
serial_info.size = rewind_state.size;
core_serialize(&serial_info);
state_manager_push_do(rewind_state.state);
}
uint32_t *netplay_bsv_header_generate(size_t *size, uint32_t magic)
{
retro_ctx_serialize_info_t serial_info;
retro_ctx_size_info_t info;
uint32_t *content_crc_ptr;
size_t serialize_size, header_size;
uint32_t *header, bsv_header[4] = {0};
core_serialize_size(&info);
serialize_size = info.size;
header_size = sizeof(bsv_header) + serialize_size;
*size = header_size;
header = (uint32_t*)malloc(header_size);
if (!header)
goto error;
content_get_crc(&content_crc_ptr);
bsv_header[MAGIC_INDEX] = swap_if_little32(BSV_MAGIC);
bsv_header[SERIALIZER_INDEX] = swap_if_big32(magic);
bsv_header[CRC_INDEX] = swap_if_big32(*content_crc_ptr);
bsv_header[STATE_SIZE_INDEX] = swap_if_big32(serialize_size);
serial_info.data = header + 4;
serial_info.size = serialize_size;
if (serialize_size && !core_serialize(&serial_info))
goto error;
memcpy(header, bsv_header, sizeof(bsv_header));
return header;
error:
if (header)
free(header);
return NULL;
}
bool netplay_try_init_serialization(netplay_t *netplay)
{
retro_ctx_serialize_info_t serial_info;
if (netplay->state_size)
return true;
if (!netplay_init_serialization(netplay))
return false;
/* Check if we can actually save */
serial_info.data_const = NULL;
serial_info.data = netplay->buffer[netplay->self_ptr].state;
serial_info.size = netplay->state_size;
if (!core_serialize(&serial_info))
return false;
/* Once initialized, we no longer exhibit this quirk */
netplay->quirks &= ~((uint64_t) NETPLAY_QUIRK_INITIALIZATION);
return true;
}
/**
* netplay_net_pre_frame:
* @netplay : pointer to netplay object
*
* Pre-frame for Netplay (normal version).
**/
static bool netplay_net_pre_frame(netplay_t *netplay)
{
retro_ctx_serialize_info_t serial_info;
if (netplay_delta_frame_ready(netplay, &netplay->buffer[netplay->self_ptr], netplay->self_frame_count))
{
serial_info.data_const = NULL;
serial_info.data = netplay->buffer[netplay->self_ptr].state;
serial_info.size = netplay->state_size;
memset(serial_info.data, 0, serial_info.size);
if ((netplay->quirks & NETPLAY_QUIRK_INITIALIZATION) || netplay->self_frame_count == 0)
{
/* Don't serialize until it's safe */
}
else if (!(netplay->quirks & NETPLAY_QUIRK_NO_SAVESTATES) && core_serialize(&serial_info))
{
if (netplay->force_send_savestate && !netplay->stall)
{
/* Send this along to the other side */
serial_info.data_const = netplay->buffer[netplay->self_ptr].state;
netplay_load_savestate(netplay, &serial_info, false);
netplay->force_send_savestate = false;
}
}
else
{
/* If the core can't serialize properly, we must stall for the
* remote input on EVERY frame, because we can't recover */
netplay->quirks |= NETPLAY_QUIRK_NO_SAVESTATES;
netplay->stall_frames = 0;
}
/* If we can't transmit savestates, we must stall until the client is ready */
if (!netplay->has_connection &&
netplay->self_frame_count > 0 &&
(netplay->quirks & (NETPLAY_QUIRK_NO_SAVESTATES|NETPLAY_QUIRK_NO_TRANSMISSION)))
netplay->stall = RARCH_NETPLAY_STALL_NO_CONNECTION;
}
if (netplay->is_server && !netplay->has_connection)
{
fd_set fds;
struct timeval tmp_tv = {0};
int new_fd;
struct sockaddr_storage their_addr;
socklen_t addr_size;
/* Check for a connection */
FD_ZERO(&fds);
FD_SET(netplay->fd, &fds);
if (socket_select(netplay->fd + 1, &fds, NULL, NULL, &tmp_tv) > 0 &&
FD_ISSET(netplay->fd, &fds))
{
addr_size = sizeof(their_addr);
new_fd = accept(netplay->fd, (struct sockaddr*)&their_addr, &addr_size);
if (new_fd < 0)
{
RARCH_ERR("%s\n", msg_hash_to_str(MSG_NETPLAY_FAILED));
return true;
}
socket_close(netplay->fd);
netplay->fd = new_fd;
#if defined(IPPROTO_TCP) && defined(TCP_NODELAY)
{
int flag = 1;
if (setsockopt(netplay->fd, IPPROTO_TCP, TCP_NODELAY, (void*)&flag, sizeof(int)) < 0)
RARCH_WARN("Could not set netplay TCP socket to nodelay. Expect jitter.\n");
}
#endif
#if defined(F_SETFD) && defined(FD_CLOEXEC)
/* Don't let any inherited processes keep open our port */
if (fcntl(netplay->fd, F_SETFD, FD_CLOEXEC) < 0)
RARCH_WARN("Cannot set Netplay port to close-on-exec. It may fail to reopen if the client disconnects.\n");
#endif
/* Establish the connection */
if (netplay_handshake(netplay))
{
netplay->has_connection = true;
/* Send them the savestate */
if (!(netplay->quirks & (NETPLAY_QUIRK_NO_SAVESTATES|NETPLAY_QUIRK_NO_TRANSMISSION)))
{
netplay->force_send_savestate = true;
}
else
{
/* Because the first frame isn't serialized, we're actually at
* frame 1 */
netplay->self_ptr = NEXT_PTR(netplay->self_ptr);
netplay->self_frame_count = 1;
}
/* And expect the current frame from the other side */
netplay->read_frame_count = netplay->other_frame_count = netplay->self_frame_count;
netplay->read_ptr = netplay->other_ptr = netplay->self_ptr;
/* Unstall if we were waiting for this */
if (netplay->stall == RARCH_NETPLAY_STALL_NO_CONNECTION)
netplay->stall = 0;
}
else
{
socket_close(netplay->fd);
/* FIXME: Get in a state to accept another client */
}
}
}
netplay->can_poll = true;
input_poll_net();
return (netplay->stall != RARCH_NETPLAY_STALL_NO_CONNECTION);
}
/**
* netplay_net_post_frame:
* @netplay : pointer to netplay object
*
* Post-frame for Netplay (normal version).
* We check if we have new input and replay from recorded input.
**/
static void netplay_net_post_frame(netplay_t *netplay)
{
netplay->self_ptr = NEXT_PTR(netplay->self_ptr);
netplay->self_frame_count++;
/* Only relevant if we're connected */
if (!netplay->has_connection)
{
netplay->read_frame_count = netplay->other_frame_count = netplay->self_frame_count;
netplay->read_ptr = netplay->other_ptr = netplay->self_ptr;
return;
}
#ifndef DEBUG_NONDETERMINISTIC_CORES
if (!netplay->force_rewind)
{
/* Skip ahead if we predicted correctly.
* Skip until our simulation failed. */
while (netplay->other_frame_count < netplay->read_frame_count &&
netplay->other_frame_count < netplay->self_frame_count)
{
struct delta_frame *ptr = &netplay->buffer[netplay->other_ptr];
if (memcmp(ptr->simulated_input_state, ptr->real_input_state,
sizeof(ptr->real_input_state)) != 0
&& !ptr->used_real)
break;
netplay_handle_frame_hash(netplay, ptr);
netplay->other_ptr = NEXT_PTR(netplay->other_ptr);
netplay->other_frame_count++;
}
}
#endif
/* Now replay the real input if we've gotten ahead of it */
if (netplay->force_rewind ||
(netplay->other_frame_count < netplay->read_frame_count &&
netplay->other_frame_count < netplay->self_frame_count))
{
retro_ctx_serialize_info_t serial_info;
/* Replay frames. */
netplay->is_replay = true;
netplay->replay_ptr = netplay->other_ptr;
netplay->replay_frame_count = netplay->other_frame_count;
if (netplay->quirks & NETPLAY_QUIRK_INITIALIZATION)
/* Make sure we're initialized before we start loading things */
netplay_wait_and_init_serialization(netplay);
serial_info.data = NULL;
serial_info.data_const = netplay->buffer[netplay->replay_ptr].state;
serial_info.size = netplay->state_size;
if (!core_unserialize(&serial_info))
{
RARCH_ERR("Netplay savestate loading failed: Prepare for desync!\n");
}
while (netplay->replay_frame_count < netplay->self_frame_count)
{
struct delta_frame *ptr = &netplay->buffer[netplay->replay_ptr];
serial_info.data = ptr->state;
serial_info.size = netplay->state_size;
serial_info.data_const = NULL;
/* Remember the current state */
memset(serial_info.data, 0, serial_info.size);
core_serialize(&serial_info);
if (netplay->replay_frame_count < netplay->read_frame_count)
netplay_handle_frame_hash(netplay, ptr);
/* Simulate this frame's input */
if (netplay->replay_frame_count >= netplay->read_frame_count)
netplay_simulate_input(netplay, netplay->replay_ptr);
autosave_lock();
core_run();
autosave_unlock();
netplay->replay_ptr = NEXT_PTR(netplay->replay_ptr);
netplay->replay_frame_count++;
#ifdef DEBUG_NONDETERMINISTIC_CORES
if (ptr->have_remote && netplay_delta_frame_ready(netplay, &netplay->buffer[netplay->replay_ptr], netplay->replay_frame_count))
{
RARCH_LOG("PRE %u: %X\n", netplay->replay_frame_count-1, netplay_delta_frame_crc(netplay, ptr));
if (netplay->is_server)
RARCH_LOG("INP %X %X\n", ptr->real_input_state[0], ptr->self_state[0]);
else
RARCH_LOG("INP %X %X\n", ptr->self_state[0], ptr->real_input_state[0]);
ptr = &netplay->buffer[netplay->replay_ptr];
serial_info.data = ptr->state;
memset(serial_info.data, 0, serial_info.size);
core_serialize(&serial_info);
RARCH_LOG("POST %u: %X\n", netplay->replay_frame_count-1, netplay_delta_frame_crc(netplay, ptr));
}
#endif
}
if (netplay->read_frame_count < netplay->self_frame_count)
{
netplay->other_ptr = netplay->read_ptr;
netplay->other_frame_count = netplay->read_frame_count;
}
else
{
netplay->other_ptr = netplay->self_ptr;
netplay->other_frame_count = netplay->self_frame_count;
}
netplay->is_replay = false;
netplay->force_rewind = false;
}
/* If we're supposed to stall, rewind (we shouldn't get this far if we're
* stalled, so this is a last resort) */
if (netplay->stall)
{
retro_ctx_serialize_info_t serial_info;
netplay->self_ptr = PREV_PTR(netplay->self_ptr);
netplay->self_frame_count--;
serial_info.data = NULL;
serial_info.data_const = netplay->buffer[netplay->self_ptr].state;
serial_info.size = netplay->state_size;
core_unserialize(&serial_info);
}
}
/**
* netplay_load_savestate
* @netplay : pointer to netplay object
* @serial_info : the savestate being loaded, NULL means "load it yourself"
* @save : whether to save the provided serial_info into the frame buffer
*
* Inform Netplay of a savestate load and send it to the other side
**/
void netplay_load_savestate(netplay_t *netplay, retro_ctx_serialize_info_t *serial_info, bool save)
{
uint32_t header[3];
retro_ctx_serialize_info_t tmp_serial_info;
if (!netplay->has_connection)
return;
/* Record it in our own buffer */
if (save || !serial_info)
{
if (netplay_delta_frame_ready(netplay,
&netplay->buffer[netplay->self_ptr], netplay->self_frame_count))
{
if (!serial_info)
{
tmp_serial_info.size = netplay->state_size;
tmp_serial_info.data = netplay->buffer[netplay->self_ptr].state;
if (!core_serialize(&tmp_serial_info))
return;
tmp_serial_info.data_const = tmp_serial_info.data;
serial_info = &tmp_serial_info;
}
else
{
if (serial_info->size <= netplay->state_size)
{
memcpy(netplay->buffer[netplay->self_ptr].state,
serial_info->data_const, serial_info->size);
}
}
}
}
/* We need to ignore any intervening data from the other side, and never rewind past this */
if (netplay->read_frame_count < netplay->self_frame_count)
{
netplay->read_ptr = netplay->self_ptr;
netplay->read_frame_count = netplay->self_frame_count;
}
if (netplay->other_frame_count < netplay->self_frame_count)
{
netplay->other_ptr = netplay->self_ptr;
netplay->other_frame_count = netplay->self_frame_count;
}
/* If we can't send it to the peer, loading a state was a bad idea */
if (netplay->quirks & (NETPLAY_QUIRK_NO_SAVESTATES|NETPLAY_QUIRK_NO_TRANSMISSION))
return;
/* And send it to the peer (FIXME: this is an ugly way to do this) */
header[0] = htonl(NETPLAY_CMD_LOAD_SAVESTATE);
header[1] = htonl(serial_info->size + sizeof(uint32_t));
header[2] = htonl(netplay->self_frame_count);
if (!socket_send_all_blocking(netplay->fd, header, sizeof(header), false))
{
hangup(netplay);
return;
}
if (!socket_send_all_blocking(netplay->fd, serial_info->data_const, serial_info->size, false))
{
hangup(netplay);
return;
}
}
/**
* netplay_sync_post_frame
* @netplay : pointer to netplay object
*
* Post-frame for Netplay synchronization.
* We check if we have new input and replay from recorded input.
*/
void netplay_sync_post_frame(netplay_t *netplay, bool stalled)
{
uint32_t lo_frame_count, hi_frame_count;
/* Unless we're stalling, we've just finished running a frame */
if (!stalled)
{
netplay->run_ptr = NEXT_PTR(netplay->run_ptr);
netplay->run_frame_count++;
}
/* We've finished an input frame even if we're stalling */
if ((!stalled || netplay->stall == NETPLAY_STALL_INPUT_LATENCY) &&
netplay->self_frame_count < netplay->run_frame_count + netplay->input_latency_frames)
{
netplay->self_ptr = NEXT_PTR(netplay->self_ptr);
netplay->self_frame_count++;
}
/* Only relevant if we're connected and not in a desynching operation */
if ((netplay->is_server && !netplay->connected_players) ||
(netplay->self_mode < NETPLAY_CONNECTION_CONNECTED) ||
(netplay->desync))
{
netplay->other_frame_count = netplay->self_frame_count;
netplay->other_ptr = netplay->self_ptr;
/* FIXME: Duplication */
if (netplay->catch_up)
{
netplay->catch_up = false;
input_driver_unset_nonblock_state();
driver_set_nonblock_state();
}
return;
}
/* Reset if it was requested */
if (netplay->force_reset)
{
core_reset();
netplay->force_reset = false;
}
#ifndef DEBUG_NONDETERMINISTIC_CORES
if (!netplay->force_rewind)
{
/* Skip ahead if we predicted correctly.
* Skip until our simulation failed. */
while (netplay->other_frame_count < netplay->unread_frame_count &&
netplay->other_frame_count < netplay->run_frame_count)
{
struct delta_frame *ptr = &netplay->buffer[netplay->other_ptr];
size_t i;
for (i = 0; i < MAX_USERS; i++)
{
if (memcmp(ptr->simulated_input_state[i], ptr->real_input_state[i],
sizeof(ptr->real_input_state[i])) != 0
&& !ptr->used_real[i])
break;
}
if (i != MAX_USERS) break;
netplay_handle_frame_hash(netplay, ptr);
netplay->other_ptr = NEXT_PTR(netplay->other_ptr);
netplay->other_frame_count++;
}
}
#endif
/* Now replay the real input if we've gotten ahead of it */
if (netplay->force_rewind ||
(netplay->other_frame_count < netplay->unread_frame_count &&
netplay->other_frame_count < netplay->run_frame_count))
{
retro_ctx_serialize_info_t serial_info;
/* Replay frames. */
netplay->is_replay = true;
netplay->replay_ptr = netplay->other_ptr;
netplay->replay_frame_count = netplay->other_frame_count;
if (netplay->quirks & NETPLAY_QUIRK_INITIALIZATION)
/* Make sure we're initialized before we start loading things */
netplay_wait_and_init_serialization(netplay);
serial_info.data = NULL;
serial_info.data_const = netplay->buffer[netplay->replay_ptr].state;
serial_info.size = netplay->state_size;
if (!core_unserialize(&serial_info))
{
RARCH_ERR("Netplay savestate loading failed: Prepare for desync!\n");
}
while (netplay->replay_frame_count < netplay->run_frame_count)
{
retro_time_t start, tm;
struct delta_frame *ptr = &netplay->buffer[netplay->replay_ptr];
serial_info.data = ptr->state;
serial_info.size = netplay->state_size;
serial_info.data_const = NULL;
start = cpu_features_get_time_usec();
/* Remember the current state */
memset(serial_info.data, 0, serial_info.size);
core_serialize(&serial_info);
if (netplay->replay_frame_count < netplay->unread_frame_count)
netplay_handle_frame_hash(netplay, ptr);
/* Re-simulate this frame's input */
netplay_simulate_input(netplay, netplay->replay_ptr, true);
autosave_lock();
core_run();
autosave_unlock();
netplay->replay_ptr = NEXT_PTR(netplay->replay_ptr);
netplay->replay_frame_count++;
#ifdef DEBUG_NONDETERMINISTIC_CORES
if (ptr->have_remote && netplay_delta_frame_ready(netplay, &netplay->buffer[netplay->replay_ptr], netplay->replay_frame_count))
{
RARCH_LOG("PRE %u: %X\n", netplay->replay_frame_count-1, netplay_delta_frame_crc(netplay, ptr));
if (netplay->is_server)
RARCH_LOG("INP %X %X\n", ptr->real_input_state[0], ptr->self_state[0]);
else
RARCH_LOG("INP %X %X\n", ptr->self_state[0], ptr->real_input_state[0]);
ptr = &netplay->buffer[netplay->replay_ptr];
serial_info.data = ptr->state;
memset(serial_info.data, 0, serial_info.size);
core_serialize(&serial_info);
RARCH_LOG("POST %u: %X\n", netplay->replay_frame_count-1, netplay_delta_frame_crc(netplay, ptr));
}
#endif
/* Get our time window */
tm = cpu_features_get_time_usec() - start;
netplay->frame_run_time_sum -= netplay->frame_run_time[netplay->frame_run_time_ptr];
netplay->frame_run_time[netplay->frame_run_time_ptr] = tm;
netplay->frame_run_time_sum += tm;
netplay->frame_run_time_ptr++;
if (netplay->frame_run_time_ptr >= NETPLAY_FRAME_RUN_TIME_WINDOW)
netplay->frame_run_time_ptr = 0;
}
/* Average our time */
netplay->frame_run_time_avg = netplay->frame_run_time_sum / NETPLAY_FRAME_RUN_TIME_WINDOW;
if (netplay->unread_frame_count < netplay->run_frame_count)
{
netplay->other_ptr = netplay->unread_ptr;
netplay->other_frame_count = netplay->unread_frame_count;
}
else
{
netplay->other_ptr = netplay->run_ptr;
netplay->other_frame_count = netplay->run_frame_count;
}
netplay->is_replay = false;
netplay->force_rewind = false;
}
if (netplay->is_server)
{
uint32_t player;
lo_frame_count = hi_frame_count = netplay->unread_frame_count;
/* Look for players that are ahead of us */
for (player = 0; player < MAX_USERS; player++)
{
if (!(netplay->connected_players & (1<<player))) continue;
if (netplay->read_frame_count[player] > hi_frame_count)
hi_frame_count = netplay->read_frame_count[player];
}
}
else
{
lo_frame_count = hi_frame_count = netplay->server_frame_count;
}
/* If we're behind, try to catch up */
if (netplay->catch_up)
{
/* Are we caught up? */
if (netplay->self_frame_count + 1 >= lo_frame_count)
{
netplay->catch_up = false;
input_driver_unset_nonblock_state();
driver_set_nonblock_state();
}
}
else if (!stalled)
{
if (netplay->self_frame_count + 3 < lo_frame_count)
{
retro_time_t cur_time = cpu_features_get_time_usec();
uint32_t cur_behind = lo_frame_count - netplay->self_frame_count;
/* We're behind, but we'll only try to catch up if we're actually
* falling behind, i.e. if we're more behind after some time */
if (netplay->catch_up_time == 0)
{
/* Record our current time to check for catch-up later */
netplay->catch_up_time = cur_time;
netplay->catch_up_behind = cur_behind;
}
else if (cur_time - netplay->catch_up_time > CATCH_UP_CHECK_TIME_USEC)
{
/* Time to check how far behind we are */
if (netplay->catch_up_behind <= cur_behind)
{
/* We're definitely falling behind! */
netplay->catch_up = true;
netplay->catch_up_time = 0;
input_driver_set_nonblock_state();
driver_set_nonblock_state();
}
else
{
/* Check again in another period */
netplay->catch_up_time = cur_time;
netplay->catch_up_behind = cur_behind;
}
}
}
else if (netplay->self_frame_count + 3 < hi_frame_count)
{
size_t i;
netplay->catch_up_time = 0;
/* We're falling behind some clients but not others, so request that
* clients ahead of us stall */
for (i = 0; i < netplay->connections_size; i++)
{
struct netplay_connection *connection = &netplay->connections[i];
int player;
if (!connection->active ||
connection->mode != NETPLAY_CONNECTION_PLAYING)
continue;
player = connection->player;
/* Are they ahead? */
if (netplay->self_frame_count + 3 < netplay->read_frame_count[player])
{
/* Tell them to stall */
if (connection->stall_frame + NETPLAY_MAX_REQ_STALL_FREQUENCY <
netplay->self_frame_count)
{
connection->stall_frame = netplay->self_frame_count;
netplay_cmd_stall(netplay, connection,
netplay->read_frame_count[player] -
netplay->self_frame_count + 1);
}
}
}
}
else
netplay->catch_up_time = 0;
}
else
netplay->catch_up_time = 0;
}
/**
* netplay_sync_pre_frame
* @netplay : pointer to netplay object
*
* Pre-frame for Netplay synchronization.
*/
bool netplay_sync_pre_frame(netplay_t *netplay)
{
retro_ctx_serialize_info_t serial_info;
if (netplay_delta_frame_ready(netplay, &netplay->buffer[netplay->run_ptr], netplay->run_frame_count))
{
serial_info.data_const = NULL;
serial_info.data = netplay->buffer[netplay->run_ptr].state;
serial_info.size = netplay->state_size;
memset(serial_info.data, 0, serial_info.size);
if ((netplay->quirks & NETPLAY_QUIRK_INITIALIZATION) || netplay->run_frame_count == 0)
{
/* Don't serialize until it's safe */
}
else if (!(netplay->quirks & NETPLAY_QUIRK_NO_SAVESTATES) && core_serialize(&serial_info))
{
if (netplay->force_send_savestate && !netplay->stall && !netplay->remote_paused)
{
/* Bring our running frame and input frames into parity so we don't
* send old info */
if (netplay->run_ptr != netplay->self_ptr)
{
memcpy(netplay->buffer[netplay->self_ptr].state,
netplay->buffer[netplay->run_ptr].state,
netplay->state_size);
netplay->run_ptr = netplay->self_ptr;
netplay->run_frame_count = netplay->self_frame_count;
}
/* Send this along to the other side */
serial_info.data_const = netplay->buffer[netplay->run_ptr].state;
netplay_load_savestate(netplay, &serial_info, false);
netplay->force_send_savestate = false;
}
}
else
{
/* If the core can't serialize properly, we must stall for the
* remote input on EVERY frame, because we can't recover */
netplay->quirks |= NETPLAY_QUIRK_NO_SAVESTATES;
netplay->stateless_mode = true;
}
/* If we can't transmit savestates, we must stall until the client is ready */
if (netplay->run_frame_count > 0 &&
(netplay->quirks & (NETPLAY_QUIRK_NO_SAVESTATES|NETPLAY_QUIRK_NO_TRANSMISSION)) &&
(netplay->connections_size == 0 || !netplay->connections[0].active ||
netplay->connections[0].mode < NETPLAY_CONNECTION_CONNECTED))
netplay->stall = NETPLAY_STALL_NO_CONNECTION;
}
if (netplay->is_server)
{
fd_set fds;
struct timeval tmp_tv = {0};
int new_fd;
struct sockaddr_storage their_addr;
socklen_t addr_size;
struct netplay_connection *connection;
size_t connection_num;
/* Check for a connection */
FD_ZERO(&fds);
FD_SET(netplay->listen_fd, &fds);
if (socket_select(netplay->listen_fd + 1, &fds, NULL, NULL, &tmp_tv) > 0 &&
FD_ISSET(netplay->listen_fd, &fds))
{
addr_size = sizeof(their_addr);
new_fd = accept(netplay->listen_fd, (struct sockaddr*)&their_addr, &addr_size);
if (new_fd < 0)
{
RARCH_ERR("%s\n", msg_hash_to_str(MSG_NETPLAY_FAILED));
goto process;
}
/* Set the socket nonblocking */
if (!socket_nonblock(new_fd))
{
/* Catastrophe! */
socket_close(new_fd);
goto process;
}
#if defined(IPPROTO_TCP) && defined(TCP_NODELAY)
{
int flag = 1;
if (setsockopt(new_fd, IPPROTO_TCP, TCP_NODELAY,
#ifdef _WIN32
(const char*)
#else
(const void*)
#endif
&flag,
sizeof(int)) < 0)
RARCH_WARN("Could not set netplay TCP socket to nodelay. Expect jitter.\n");
}
#endif
#if defined(F_SETFD) && defined(FD_CLOEXEC)
/* Don't let any inherited processes keep open our port */
if (fcntl(new_fd, F_SETFD, FD_CLOEXEC) < 0)
RARCH_WARN("Cannot set Netplay port to close-on-exec. It may fail to reopen if the client disconnects.\n");
#endif
/* Allocate a connection */
for (connection_num = 0; connection_num < netplay->connections_size; connection_num++)
if (!netplay->connections[connection_num].active &&
netplay->connections[connection_num].mode != NETPLAY_CONNECTION_DELAYED_DISCONNECT) break;
if (connection_num == netplay->connections_size)
{
if (connection_num == 0)
{
netplay->connections = (struct netplay_connection*)malloc(sizeof(struct netplay_connection));
if (netplay->connections == NULL)
{
socket_close(new_fd);
goto process;
}
netplay->connections_size = 1;
}
else
{
size_t new_connections_size = netplay->connections_size * 2;
struct netplay_connection *new_connections = (struct netplay_connection*)
realloc(netplay->connections,
new_connections_size*sizeof(struct netplay_connection));
if (new_connections == NULL)
{
socket_close(new_fd);
goto process;
}
memset(new_connections + netplay->connections_size, 0,
netplay->connections_size * sizeof(struct netplay_connection));
netplay->connections = new_connections;
netplay->connections_size = new_connections_size;
}
}
connection = &netplay->connections[connection_num];
/* Set it up */
memset(connection, 0, sizeof(*connection));
connection->active = true;
connection->fd = new_fd;
connection->mode = NETPLAY_CONNECTION_INIT;
if (!netplay_init_socket_buffer(&connection->send_packet_buffer,
netplay->packet_buffer_size) ||
!netplay_init_socket_buffer(&connection->recv_packet_buffer,
netplay->packet_buffer_size))
{
if (connection->send_packet_buffer.data)
netplay_deinit_socket_buffer(&connection->send_packet_buffer);
connection->active = false;
socket_close(new_fd);
goto process;
}
netplay_handshake_init_send(netplay, connection);
}
}
process:
netplay->can_poll = true;
input_poll_net();
return (netplay->stall != NETPLAY_STALL_NO_CONNECTION);
}
/**
* post_frame:
* @netplay : pointer to netplay object
*
* Post-frame for Netplay (normal version).
* We check if we have new input and replay from recorded input.
**/
static void netplay_net_post_frame(netplay_t *netplay)
{
netplay->frame_count++;
/* Nothing to do... */
if (netplay->other_frame_count == netplay->read_frame_count)
return;
/* Skip ahead if we predicted correctly.
* Skip until our simulation failed. */
while (netplay->other_frame_count < netplay->read_frame_count)
{
const struct delta_frame *ptr = &netplay->buffer[netplay->other_ptr];
if (memcmp(ptr->simulated_input_state, ptr->real_input_state,
sizeof(ptr->real_input_state)) != 0
&& !ptr->used_real)
break;
netplay->other_ptr = NEXT_PTR(netplay->other_ptr);
netplay->other_frame_count++;
}
if (netplay->other_frame_count < netplay->read_frame_count)
{
retro_ctx_serialize_info_t serial_info;
bool first = true;
/* Replay frames. */
netplay->is_replay = true;
netplay->tmp_ptr = netplay->other_ptr;
netplay->tmp_frame_count = netplay->other_frame_count;
serial_info.data_const = netplay->buffer[netplay->other_ptr].state;
serial_info.size = netplay->state_size;
core_unserialize(&serial_info);
while (first || (netplay->tmp_ptr != netplay->self_ptr))
{
serial_info.data = netplay->buffer[netplay->tmp_ptr].state;
serial_info.size = netplay->state_size;
serial_info.data_const = NULL;
core_serialize(&serial_info);
#if defined(HAVE_THREADS)
autosave_lock();
#endif
core_run();
#if defined(HAVE_THREADS)
autosave_unlock();
#endif
netplay->tmp_ptr = NEXT_PTR(netplay->tmp_ptr);
netplay->tmp_frame_count++;
first = false;
}
netplay->other_ptr = netplay->read_ptr;
netplay->other_frame_count = netplay->read_frame_count;
netplay->is_replay = false;
}
}
/**
* check_rewind:
* @pressed : was rewind key pressed or held?
*
* Checks if rewind toggle/hold was being pressed and/or held.
**/
void state_manager_check_rewind(bool pressed)
{
static bool first = true;
settings_t *settings = config_get_ptr();
if (state_manager_frame_is_reversed())
{
audio_driver_frame_is_reverse();
state_manager_set_frame_is_reversed(false);
}
if (first)
{
first = false;
return;
}
if (!rewind_state.state)
return;
if (pressed)
{
const void *buf = NULL;
if (state_manager_pop(rewind_state.state, &buf))
{
retro_ctx_serialize_info_t serial_info;
state_manager_set_frame_is_reversed(true);
audio_driver_setup_rewind();
runloop_msg_queue_push(
msg_hash_to_str(MSG_REWINDING), 0,
runloop_ctl(RUNLOOP_CTL_IS_PAUSED, NULL)
? 1 : 30, true);
serial_info.data_const = buf;
serial_info.size = rewind_state.size;
core_unserialize(&serial_info);
if (bsv_movie_ctl(BSV_MOVIE_CTL_IS_INITED, NULL))
bsv_movie_ctl(BSV_MOVIE_CTL_FRAME_REWIND, NULL);
}
else
runloop_msg_queue_push(
msg_hash_to_str(MSG_REWIND_REACHED_END),
0, 30, true);
}
else
{
static unsigned cnt = 0;
cnt = (cnt + 1) % (settings->rewind_granularity ?
settings->rewind_granularity : 1); /* Avoid possible SIGFPE. */
if ((cnt == 0) || bsv_movie_ctl(BSV_MOVIE_CTL_IS_INITED, NULL))
{
retro_ctx_serialize_info_t serial_info;
static struct retro_perf_counter rewind_serialize = {0};
void *state = NULL;
state_manager_push_where(rewind_state.state, &state);
performance_counter_init(&rewind_serialize, "rewind_serialize");
performance_counter_start(&rewind_serialize);
serial_info.data = state;
serial_info.size = rewind_state.size;
core_serialize(&serial_info);
performance_counter_stop(&rewind_serialize);
state_manager_push_do(rewind_state.state);
}
}
core_set_rewind_callbacks();
}
