Mercurial > repos > blastem
annotate event_log.c @ 1956:275f1c4bdb25
Netplay protocol size optimization
author | Michael Pavone <pavone@retrodev.com> |
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date | Fri, 01 May 2020 23:39:45 -0700 |
parents | 1c7af12efe8b |
children | ba06346611a1 |
rev | line source |
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1947
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1 #ifdef _WIN32 |
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2 #define WINVER 0x501 |
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3 #include <winsock2.h> |
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4 #include <ws2tcpip.h> |
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5 #else |
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6 #include <sys/types.h> |
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7 #include <sys/socket.h> |
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8 #include <unistd.h> |
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9 #include <netdb.h> |
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10 #include <netinet/tcp.h> |
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11 #endif |
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12 |
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13 #include <errno.h> |
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14 #include "event_log.h" |
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15 #include "util.h" |
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16 #include "blastem.h" |
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17 #include "saves.h" |
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18 |
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19 enum { |
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20 CMD_GAMEPAD_DOWN, |
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21 CMD_GAMEPAD_UP, |
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22 }; |
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23 |
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24 static uint8_t active, fully_active; |
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25 static FILE *event_file; |
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26 static serialize_buffer buffer; |
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27 |
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28 static const char el_ident[] = "BLSTEL\x02\x00"; |
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29 static uint32_t last; |
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30 void event_log_file(char *fname) |
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31 { |
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32 event_file = fopen(fname, "wb"); |
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33 if (!event_file) { |
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34 warning("Failed to open event file %s for writing\n", fname); |
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35 return; |
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36 } |
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37 fwrite(el_ident, 1, sizeof(el_ident) - 1, event_file); |
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38 init_serialize(&buffer); |
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39 active = fully_active = 1; |
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40 last = 0; |
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41 } |
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42 |
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43 static int listen_sock, remotes[7]; |
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44 static int num_remotes; |
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45 void event_log_tcp(char *address, char *port) |
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46 { |
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47 struct addrinfo request, *result; |
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48 socket_init(); |
1947
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49 memset(&request, 0, sizeof(request)); |
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50 request.ai_family = AF_INET; |
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51 request.ai_socktype = SOCK_STREAM; |
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52 request.ai_flags = AI_PASSIVE; |
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53 getaddrinfo(address, port, &request, &result); |
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54 |
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55 listen_sock = socket(result->ai_family, result->ai_socktype, result->ai_protocol); |
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56 if (listen_sock < 0) { |
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57 warning("Failed to open event log listen socket on %s:%s\n", address, port); |
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58 goto cleanup_address; |
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59 } |
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60 int param = 1; |
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61 setsockopt(listen_sock, SOL_SOCKET, SO_REUSEADDR, (const char *)¶m, sizeof(param)); |
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62 if (bind(listen_sock, result->ai_addr, result->ai_addrlen) < 0) { |
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63 warning("Failed to bind event log listen socket on %s:%s\n", address, port); |
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64 socket_close(listen_sock); |
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65 goto cleanup_address; |
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66 } |
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67 if (listen(listen_sock, 3) < 0) { |
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68 warning("Failed to listen for event log remotes on %s:%s\n", address, port); |
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69 socket_close(listen_sock); |
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70 goto cleanup_address; |
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71 } |
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72 socket_blocking(listen_sock, 0); |
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73 active = 1; |
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74 cleanup_address: |
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75 freeaddrinfo(result); |
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76 } |
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77 |
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78 static uint8_t *system_start; |
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79 static size_t system_start_size; |
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80 void event_system_start(system_type stype, vid_std video_std, char *name) |
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81 { |
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82 if (!active) { |
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83 return; |
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84 } |
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85 save_int8(&buffer, stype); |
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86 save_int8(&buffer, video_std); |
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87 size_t name_len = strlen(name); |
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88 if (name_len > 255) { |
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89 name_len = 255; |
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90 } |
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91 save_int8(&buffer, name_len); |
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92 save_buffer8(&buffer, name, strlen(name)); |
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93 if (!fully_active) { |
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94 system_start = malloc(buffer.size); |
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95 system_start_size = buffer.size; |
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96 memcpy(system_start, buffer.data, buffer.size); |
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97 buffer.size = 0; |
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98 } |
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99 } |
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100 |
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101 //header formats |
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102 //Single byte: 4 bit type, 4 bit delta (16-31) |
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103 //Three Byte: 8 bit type, 16-bit delta |
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104 //Four byte: 8-bit type, 24-bit signed delta |
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105 #define FORMAT_3BYTE 0xE0 |
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106 #define FORMAT_4BYTE 0xF0 |
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107 static uint8_t last_event_type = 0xFF; |
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108 static uint32_t last_delta; |
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109 static uint8_t multi_count; |
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110 static size_t multi_start; |
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111 static void event_header(uint8_t type, uint32_t cycle) |
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112 { |
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113 uint32_t delta = cycle - last; |
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114 if (multi_count) { |
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115 if (type != last_event_type || delta != last_delta) { |
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116 buffer.data[multi_start] |= multi_count - 2; |
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117 multi_count = 0; |
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118 } else { |
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119 ++multi_count; |
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120 if (multi_count == 17) { |
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121 buffer.data[multi_start] |= multi_count - 2; |
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122 last_event_type = 0xFF; |
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123 multi_count = 0; |
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124 } |
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125 return; |
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126 } |
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127 } else if (type == last_event_type && delta == last_delta) { |
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128 //make some room |
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129 save_int8(&buffer, 0); |
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130 //shift existing command |
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131 memmove(buffer.data + multi_start + 1, buffer.data + multi_start, buffer.size - multi_start - 1); |
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132 buffer.data[multi_start] = EVENT_MULTI << 4; |
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133 multi_count = 2; |
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134 return; |
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135 } |
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136 multi_start = buffer.size; |
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137 last_event_type = type; |
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138 last_delta = delta; |
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139 |
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140 if (delta > 65535) { |
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141 save_int8(&buffer, FORMAT_4BYTE | type); |
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142 save_int8(&buffer, delta >> 16); |
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143 save_int16(&buffer, delta); |
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144 } else if (delta >= 16 && delta < 32) { |
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145 save_int8(&buffer, type << 4 | (delta - 16)); |
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146 } else { |
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147 save_int8(&buffer, FORMAT_3BYTE | type); |
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148 save_int16(&buffer, delta); |
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149 } |
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150 } |
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151 |
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152 void event_cycle_adjust(uint32_t cycle, uint32_t deduction) |
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153 { |
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154 if (!fully_active) { |
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155 return; |
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156 } |
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157 event_header(EVENT_ADJUST, cycle); |
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158 last = cycle - deduction; |
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159 save_int32(&buffer, deduction); |
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160 } |
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161 |
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162 static size_t remote_send_progress[7]; |
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163 static uint8_t remote_needs_state[7]; |
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164 static void flush_socket(void) |
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165 { |
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166 int remote = accept(listen_sock, NULL, NULL); |
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167 if (remote != -1) { |
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168 if (num_remotes == 7) { |
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169 socket_close(remote); |
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170 } else { |
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171 printf("remote %d connected\n", num_remotes); |
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172 remotes[num_remotes] = remote; |
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173 remote_needs_state[num_remotes++] = 1; |
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174 current_system->save_state = EVENTLOG_SLOT + 1; |
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175 } |
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176 } |
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177 size_t min_progress = 0; |
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178 for (int i = 0; i < num_remotes; i++) { |
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179 int sent = 1; |
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180 if (remote_needs_state[i]) { |
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181 remote_send_progress[i] = buffer.size; |
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182 } else { |
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183 uint8_t buffer[1500]; |
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184 int bytes = recv(remotes[i], buffer, sizeof(buffer), 0); |
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185 for (int j = 0; j < bytes; j++) |
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186 { |
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187 uint8_t cmd = buffer[j]; |
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188 switch(cmd) |
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189 { |
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190 case CMD_GAMEPAD_DOWN: |
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191 case CMD_GAMEPAD_UP: { |
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192 ++j; |
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193 if (j < bytes) { |
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194 uint8_t button = buffer[j]; |
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195 uint8_t pad = (button >> 5) + i + 1; |
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196 button &= 0x1F; |
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197 if (cmd == CMD_GAMEPAD_DOWN) { |
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198 current_system->gamepad_down(current_system, pad, button); |
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199 } else { |
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200 current_system->gamepad_up(current_system, pad, button); |
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201 } |
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202 } else { |
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203 warning("Received incomplete command %X\n", cmd); |
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204 } |
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205 break; |
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206 } |
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207 default: |
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208 warning("Unrecognized remote command %X\n", cmd); |
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209 j = bytes; |
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210 } |
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211 } |
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212 } |
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213 while (sent && buffer.size - remote_send_progress[i]) |
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214 { |
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215 sent = send(remotes[i], buffer.data + remote_send_progress[i], buffer.size - remote_send_progress[i], 0); |
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216 if (sent >= 0) { |
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217 remote_send_progress[i] += sent; |
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218 } else if (socket_error_is_wouldblock()) { |
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219 socket_close(remotes[i]); |
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220 remotes[i] = remotes[num_remotes-1]; |
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221 remote_send_progress[i] = remote_send_progress[num_remotes-1]; |
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222 remote_needs_state[i] = remote_needs_state[num_remotes-1]; |
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223 num_remotes--; |
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224 i--; |
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225 break; |
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226 } |
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227 if (remote_send_progress[i] > min_progress) { |
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228 min_progress = remote_send_progress[i]; |
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229 } |
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230 } |
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231 } |
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232 if (min_progress == buffer.size) { |
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233 buffer.size = 0; |
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234 memset(remote_send_progress, 0, sizeof(remote_send_progress)); |
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235 multi_count = 0; |
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236 last_event_type = 0xFF; |
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237 } |
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238 } |
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239 |
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240 void event_log(uint8_t type, uint32_t cycle, uint8_t size, uint8_t *payload) |
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241 { |
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242 if (!fully_active) { |
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243 return; |
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244 } |
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245 event_header(type, cycle); |
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246 last = cycle; |
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247 save_buffer8(&buffer, payload, size); |
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248 if (listen_sock && buffer.size > 1280) { |
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249 flush_socket(); |
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250 } |
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251 } |
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252 |
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253 static uint32_t last_word_address; |
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254 void event_vram_word(uint32_t cycle, uint32_t address, uint16_t value) |
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255 { |
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256 uint32_t delta = address - last_word_address; |
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257 if (delta < 256) { |
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258 uint8_t buffer[3] = {delta, value >> 8, value}; |
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259 event_log(EVENT_VRAM_WORD_DELTA, cycle, sizeof(buffer), buffer); |
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260 } else { |
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261 uint8_t buffer[5] = {address >> 16, address >> 8, address, value >> 8, value}; |
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262 event_log(EVENT_VRAM_WORD, cycle, sizeof(buffer), buffer); |
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263 } |
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264 last_word_address = address; |
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265 } |
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266 |
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267 static uint32_t last_byte_address; |
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268 void event_vram_byte(uint32_t cycle, uint16_t address, uint8_t byte, uint8_t auto_inc) |
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269 { |
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270 uint32_t delta = address - last_byte_address; |
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271 if (delta == 1) { |
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272 event_log(EVENT_VRAM_BYTE_ONE, cycle, sizeof(byte), &byte); |
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273 } else if (delta == auto_inc) { |
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274 event_log(EVENT_VRAM_BYTE_AUTO, cycle, sizeof(byte), &byte); |
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275 } else if (delta < 256) { |
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276 uint8_t buffer[2] = {delta, byte}; |
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277 event_log(EVENT_VRAM_BYTE_DELTA, cycle, sizeof(buffer), buffer); |
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278 } else { |
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279 uint8_t buffer[3] = {address >> 8, address, byte}; |
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280 event_log(EVENT_VRAM_BYTE, cycle, sizeof(buffer), buffer); |
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281 } |
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282 last_byte_address = address; |
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283 } |
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284 |
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285 static size_t send_all(int sock, uint8_t *data, size_t size, int flags) |
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286 { |
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287 size_t total = 0, sent = 1; |
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288 while(sent > 0 && total < size) |
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289 { |
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290 sent = send(sock, data + total, size - total, flags); |
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291 if (sent > 0) { |
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292 total += sent; |
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293 } |
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294 } |
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295 return total; |
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296 } |
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297 |
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298 void event_state(uint32_t cycle, serialize_buffer *state) |
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299 { |
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300 if (!fully_active) { |
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301 last = cycle; |
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302 } |
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303 uint8_t header[] = { |
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304 EVENT_STATE << 4, last >> 24, last >> 16, last >> 8, last, |
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305 last_word_address >> 16, last_word_address >> 8, last_word_address, |
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306 last_byte_address >> 8, last_byte_address, |
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307 state->size >> 16, state->size >> 8, state->size |
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308 }; |
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309 for (int i = 0; i < num_remotes; i++) |
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310 { |
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311 if (remote_needs_state[i]) { |
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312 if( |
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313 send_all(remotes[i], system_start, system_start_size, 0) == system_start_size |
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314 && send_all(remotes[i], header, sizeof(header), 0) == sizeof(header) |
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315 && send_all(remotes[i], state->data, state->size, 0) == state->size |
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316 ) { |
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317 remote_send_progress[i] = buffer.size; |
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318 remote_needs_state[i] = 0; |
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319 socket_blocking(remotes[i], 0); |
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320 int flag = 1; |
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321 setsockopt(remotes[i], IPPROTO_TCP, TCP_NODELAY, (const char *)&flag, sizeof(flag)); |
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322 fully_active = 1; |
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323 } else { |
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324 socket_close(remotes[i]); |
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325 remotes[i] = remotes[num_remotes-1]; |
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326 remote_send_progress[i] = remote_send_progress[num_remotes-1]; |
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327 remote_needs_state[i] = remote_needs_state[num_remotes-1]; |
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328 num_remotes--; |
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329 i--; |
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330 } |
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331 } |
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332 } |
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333 } |
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334 |
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335 void event_flush(uint32_t cycle) |
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336 { |
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337 if (!active) { |
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338 return; |
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339 } |
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340 if (fully_active) { |
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341 event_log(EVENT_FLUSH, cycle, 0, NULL); |
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342 } |
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343 if (event_file) { |
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344 fwrite(buffer.data, 1, buffer.size, event_file); |
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345 fflush(event_file); |
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346 buffer.size = 0; |
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347 multi_count = 0; |
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348 last_event_type = 0xFF; |
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349 } else if (listen_sock) { |
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350 flush_socket(); |
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351 } |
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352 } |
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353 |
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354 void init_event_reader(event_reader *reader, uint8_t *data, size_t size) |
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355 { |
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356 reader->socket = 0; |
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357 reader->last_cycle = 0; |
1956
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358 reader->repeat_event = 0xFF; |
1947
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359 init_deserialize(&reader->buffer, data, size); |
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360 } |
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361 |
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362 void init_event_reader_tcp(event_reader *reader, char *address, char *port) |
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363 { |
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364 struct addrinfo request, *result; |
1949
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1948
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365 socket_init(); |
1947
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366 memset(&request, 0, sizeof(request)); |
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367 request.ai_family = AF_INET; |
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368 request.ai_socktype = SOCK_STREAM; |
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369 request.ai_flags = AI_PASSIVE; |
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370 getaddrinfo(address, port, &request, &result); |
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371 |
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372 reader->socket = socket(result->ai_family, result->ai_socktype, result->ai_protocol); |
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373 if (reader->socket < 0) { |
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374 fatal_error("Failed to create socket for event log connection to %s:%s\n", address, port); |
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375 } |
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376 if (connect(reader->socket, result->ai_addr, result->ai_addrlen) < 0) { |
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377 fatal_error("Failed to connect to %s:%s for event log stream\n", address, port); |
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378 } |
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379 |
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380 reader->storage = 512 * 1024; |
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381 reader->last_cycle = 0; |
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382 init_deserialize(&reader->buffer, malloc(reader->storage), reader->storage); |
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383 reader->buffer.size = 0; |
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384 while(reader->buffer.size < 3 || reader->buffer.size < 3 + reader->buffer.data[2]) |
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385 { |
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386 int bytes = recv(reader->socket, reader->buffer.data + reader->buffer.size, reader->storage - reader->buffer.size, 0); |
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387 if (bytes < 0) { |
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388 fatal_error("Failed to receive system init from %s:%s\n", address, port); |
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389 } |
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390 reader->buffer.size += bytes; |
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391 } |
1949
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392 socket_blocking(reader->socket, 0); |
1947
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393 int flag = 1; |
1949
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394 setsockopt(reader->socket, IPPROTO_TCP, TCP_NODELAY, (const char *)&flag, sizeof(flag)); |
1947
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395 } |
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396 |
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397 uint8_t reader_next_event(event_reader *reader, uint32_t *cycle_out) |
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398 { |
1956
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399 if (reader->repeat_remaining) { |
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400 reader->repeat_remaining--; |
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401 *cycle_out = reader->last_cycle + reader->repeat_delta; |
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402 reader->last_cycle = *cycle_out; |
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|
403 return reader->repeat_event; |
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404 } |
1947
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405 if (reader->socket) { |
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406 uint8_t blocking = 0; |
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407 if (reader->buffer.size - reader->buffer.cur_pos < 9) { |
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408 //set back to block mode |
1949
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diff
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|
409 socket_blocking(reader->socket, 1); |
1947
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|
410 blocking = 1; |
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411 } |
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412 if (reader->storage - (reader->buffer.size - reader->buffer.cur_pos) < 128 * 1024) { |
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|
413 reader->storage *= 2; |
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414 uint8_t *new_buf = malloc(reader->storage); |
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415 memcpy(new_buf, reader->buffer.data + reader->buffer.cur_pos, reader->buffer.size - reader->buffer.cur_pos); |
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416 free(reader->buffer.data); |
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417 reader->buffer.data = new_buf; |
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418 reader->buffer.size -= reader->buffer.cur_pos; |
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419 reader->buffer.cur_pos = 0; |
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420 } else if (reader->buffer.cur_pos >= reader->buffer.size/2 && reader->buffer.size >= reader->storage/2) { |
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421 memmove(reader->buffer.data, reader->buffer.data + reader->buffer.cur_pos, reader->buffer.size - reader->buffer.cur_pos); |
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422 reader->buffer.size -= reader->buffer.cur_pos; |
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|
423 reader->buffer.cur_pos = 0; |
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|
424 } |
1955
1c7af12efe8b
Fix awful playback latencin in new netplay implementation
Michael Pavone <pavone@retrodev.com>
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1949
diff
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|
425 int bytes = recv(reader->socket, reader->buffer.data + reader->buffer.size, reader->storage - reader->buffer.size, 0); |
1c7af12efe8b
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Michael Pavone <pavone@retrodev.com>
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1949
diff
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|
426 if (bytes >= 0) { |
1c7af12efe8b
Fix awful playback latencin in new netplay implementation
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1949
diff
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|
427 reader->buffer.size += bytes; |
1c7af12efe8b
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Michael Pavone <pavone@retrodev.com>
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1949
diff
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|
428 if (blocking && reader->buffer.size - reader->buffer.cur_pos >= 9) { |
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1949
diff
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|
429 socket_blocking(reader->socket, 0); |
1947
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|
430 } |
1955
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1949
diff
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|
431 } else if (!socket_error_is_wouldblock()) { |
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1949
diff
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|
432 printf("Connection closed, error = %X\n", socket_last_error()); |
1947
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|
433 } |
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|
434 } |
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|
435 uint8_t header = load_int8(&reader->buffer); |
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|
436 uint8_t ret; |
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|
437 uint32_t delta; |
1956
275f1c4bdb25
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Michael Pavone <pavone@retrodev.com>
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1955
diff
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|
438 uint8_t multi_start = 0; |
275f1c4bdb25
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Michael Pavone <pavone@retrodev.com>
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1955
diff
changeset
|
439 if ((header & 0xF0) == (EVENT_MULTI << 4)) { |
275f1c4bdb25
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Michael Pavone <pavone@retrodev.com>
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1955
diff
changeset
|
440 reader->repeat_remaining = (header & 0xF) + 1; |
275f1c4bdb25
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Michael Pavone <pavone@retrodev.com>
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1955
diff
changeset
|
441 multi_start = 1; |
275f1c4bdb25
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Michael Pavone <pavone@retrodev.com>
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1955
diff
changeset
|
442 header = load_int8(&reader->buffer); |
275f1c4bdb25
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1955
diff
changeset
|
443 } |
1947
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diff
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|
444 if ((header & 0xF0) < FORMAT_3BYTE) { |
1948
d01527615c7c
Fix short event format decode bug
Michael Pavone <pavone@retrodev.com>
parents:
1947
diff
changeset
|
445 delta = (header & 0xF) + 16; |
1947
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diff
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|
446 ret = header >> 4; |
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|
447 } else if ((header & 0xF0) == FORMAT_3BYTE) { |
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diff
changeset
|
448 delta = load_int16(&reader->buffer); |
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diff
changeset
|
449 ret = header & 0xF; |
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|
450 } else { |
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|
451 delta = load_int8(&reader->buffer) << 16; |
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|
452 //sign extend 24-bit delta to 32-bit |
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diff
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|
453 if (delta & 0x800000) { |
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diff
changeset
|
454 delta |= 0xFF000000; |
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parents:
diff
changeset
|
455 } |
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diff
changeset
|
456 delta |= load_int16(&reader->buffer); |
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diff
changeset
|
457 ret = header & 0xF; |
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parents:
diff
changeset
|
458 } |
1956
275f1c4bdb25
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Michael Pavone <pavone@retrodev.com>
parents:
1955
diff
changeset
|
459 if (multi_start) { |
275f1c4bdb25
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Michael Pavone <pavone@retrodev.com>
parents:
1955
diff
changeset
|
460 reader->repeat_event = ret; |
275f1c4bdb25
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Michael Pavone <pavone@retrodev.com>
parents:
1955
diff
changeset
|
461 reader->repeat_delta = delta; |
275f1c4bdb25
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Michael Pavone <pavone@retrodev.com>
parents:
1955
diff
changeset
|
462 } |
1947
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diff
changeset
|
463 *cycle_out = reader->last_cycle + delta; |
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diff
changeset
|
464 reader->last_cycle = *cycle_out; |
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|
465 if (ret == EVENT_ADJUST) { |
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parents:
diff
changeset
|
466 size_t old_pos = reader->buffer.cur_pos; |
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diff
changeset
|
467 uint32_t adjust = load_int32(&reader->buffer); |
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468 reader->buffer.cur_pos = old_pos; |
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469 reader->last_cycle -= adjust; |
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470 } else if (ret == EVENT_STATE) { |
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471 reader->last_cycle = load_int32(&reader->buffer); |
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472 reader->last_word_address = load_int8(&reader->buffer) << 16; |
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473 reader->last_word_address |= load_int16(&reader->buffer); |
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474 reader->last_byte_address = load_int16(&reader->buffer); |
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475 } |
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476 return ret; |
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477 } |
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478 |
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479 uint8_t reader_system_type(event_reader *reader) |
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480 { |
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481 return load_int8(&reader->buffer); |
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482 } |
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483 |
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484 void reader_send_gamepad_event(event_reader *reader, uint8_t pad, uint8_t button, uint8_t down) |
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485 { |
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486 uint8_t buffer[] = {down ? CMD_GAMEPAD_DOWN : CMD_GAMEPAD_UP, pad << 5 | button}; |
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487 //TODO: Deal with the fact that we're not in blocking mode so this may not actually send all |
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488 //if the buffer is full |
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489 send_all(reader->socket, buffer, sizeof(buffer), 0); |
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490 } |