/* ScummVM - Graphic Adventure Engine * * ScummVM is the legal property of its developers, whose names * are too numerous to list here. Please refer to the COPYRIGHT * file distributed with this source distribution. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * * $URL$ * $Id$ */ /* * Output to TiMidity++ MIDI server support * by Dmitry Marakasov * based on: * - Raw output support (seq.cpp) by Michael Pearce * - Pseudo /dev/sequencer of TiMidity (timidity-io.c) * by Masanao Izumo * - sys/soundcard.h by Hannu Savolainen (got from my FreeBSD * distribution, for which it was modified by Luigi Rizzo) * */ #if defined (UNIX) #include "sound/mpu401.h" #include "common/util.h" #include #include #include #include #include #include #include #include /* for gethostbyname */ #include #include #include #include #include #define SEQ_MIDIPUTC 5 #define TIMIDITY_LOW_DELAY #ifdef TIMIDITY_LOW_DELAY #define BUF_LOW_SYNC 0.1 #define BUF_HIGH_SYNC 0.15 #else #define BUF_LOW_SYNC 0.4 #define BUF_HIGH_SYNC 0.8 #endif /* default host & port */ #define DEFAULT_TIMIDITY_HOST "127.0.0.1" #define DEFAULT_TIMIDITY_PORT 7777 class MidiDriver_TIMIDITY : public MidiDriver_MPU401 { public: MidiDriver_TIMIDITY(); int open(); void close(); void send(uint32 b); void sysEx(const byte *msg, uint16 length); private: /* standart routine to extract ip address from a string */ in_addr_t host_to_addr(const char* address); /* creates a tcp connection to TiMidity server, returns filedesc (like open()) */ int connect_to_server(const char* hostname, unsigned short tcp_port); /* send command to the server; printf-like; returns reply string */ char *timidity_ctl_command(const char *fmt, ...); /* timidity data socket-related stuff */ void timidity_meta_seq(int p1, int p2, int p3); int timidity_sync(int centsec); int timidity_eot(); /* write() analogue for any midi data */ void timidity_write_data(const void *buf, size_t nbytes); /* get single line of server reply on control connection */ int fdgets(char *buff, size_t buff_size); /* teardown connection to server */ void teardown(); /* close (if needed) and nullify both control and data filedescs */ void close_all(); private: bool _isOpen; int _device_num; int _control_fd; int _data_fd; /* buffer for partial data read from _control_fd - from timidity-io.c, see fdgets() */ char _controlbuffer[BUFSIZ]; int _controlbuffer_count; /* beginning of read pointer */ int _controlbuffer_size; /* end of read pointer */ }; MidiDriver_TIMIDITY::MidiDriver_TIMIDITY() { _isOpen = false; _device_num = 0; /* init fd's */ _control_fd = _data_fd = -1; /* init buffer for control connection */ _controlbuffer_count = _controlbuffer_size = 0; } int MidiDriver_TIMIDITY::open() { char *res; char timidity_host[MAXHOSTNAMELEN]; int timidity_port, data_port, i; /* count ourselves open */ if (_isOpen) return MERR_ALREADY_OPEN; _isOpen = true; /* get server hostname; if not specified in env, use default */ if ((res = getenv("TIMIDITY_HOST")) == NULL) strncpy(timidity_host, DEFAULT_TIMIDITY_HOST, MAXHOSTNAMELEN); else strncpy(timidity_host, res, sizeof(timidity_host)); timidity_host[sizeof(timidity_host) - 1] = '\0'; /* extract control port */ if ((res = strrchr(timidity_host, ':')) != NULL) { *res++ = '\0'; timidity_port = atoi(res); } else { timidity_port = DEFAULT_TIMIDITY_PORT; } /* * create control connection to the server */ if ((_control_fd = connect_to_server(timidity_host, timidity_port)) < 0) { warning("TiMidity: can't open control connection (host=%s, port=%d)", timidity_host, timidity_port); return -1; } /* should read greeting issued by server upon connect: * "220 TiMidity++ v2.13.2 ready)" */ res = timidity_ctl_command(NULL); if (atoi(res) != 220) { warning("TiMidity: bad response from server (host=%s, port=%d): %s", timidity_host, timidity_port, res); close_all(); return -1; } /* * setup buf and prepare data connection */ /* should read: "200 OK" */ res = timidity_ctl_command("SETBUF %f %f", BUF_LOW_SYNC, BUF_HIGH_SYNC); if (atoi(res) != 200) warning("TiMidity: bad reply for SETBUF command: %s", res); /* should read something like "200 63017 is ready acceptable", * where 63017 is port for data connection */ i = 1; if (*(char *)&i == 1) res = timidity_ctl_command("OPEN lsb"); else res = timidity_ctl_command("OPEN msb"); if (atoi(res) != 200) { warning("TiMidity: bad reply for OPEN command: %s", res); close_all(); return -1; } /* * open data connection */ data_port = atoi(res + 4); if ((_data_fd = connect_to_server(timidity_host, data_port)) < 0) { warning("TiMidity: can't open data connection (host=%s, port=%d)", timidity_host, data_port); close_all(); return -1; } /* should read message issued after connecting to data port: * "200 Ready data connection" */ res = timidity_ctl_command(NULL); if (atoi(res) != 200) { fprintf(stderr, "Can't connect timidity: %s\t(host=%s, port=%d)\n", res, timidity_host, data_port); close_all(); return -1; } /* * From seq.cpp */ if (getenv("SCUMMVM_MIDIPORT")) _device_num = atoi(getenv("SCUMMVM_MIDIPORT")); return 0; } void MidiDriver_TIMIDITY::close() { teardown(); MidiDriver_MPU401::close(); _isOpen = false; } void MidiDriver_TIMIDITY::close_all() { if (_control_fd >= 0) ::close(_control_fd); if (_data_fd >= 0) ::close(_data_fd); _control_fd = _data_fd = -1; } void MidiDriver_TIMIDITY::teardown() { char *res; /* teardown connection to server (see timidity-io.c) if it * is initialized */ if (_data_fd >= 0 && _control_fd >= 0) { timidity_eot(); timidity_sync(0); /* scroll through all "302 Data connection is (already) closed" * messages till we reach something like "200 Bye" */ do { res = timidity_ctl_command("QUIT"); } while (*res && atoi(res) && atoi(res) != 302); } /* now close and nullify both filedescs */ close_all(); } in_addr_t MidiDriver_TIMIDITY::host_to_addr(const char* address) { in_addr_t addr; struct hostent *hp; /* first check if IP address is given (like 127.0.0.1)*/ if ((addr = inet_addr(address)) != INADDR_NONE) return addr; /* if not, try to resolve a hostname */ if ((hp = gethostbyname(address)) == NULL) { warning("TiMidity: unknown hostname: %s", address); return INADDR_NONE; } memcpy(&addr, hp->h_addr, (int)sizeof(in_addr_t) <= hp->h_length ? sizeof(in_addr_t) : hp->h_length); return addr; } int MidiDriver_TIMIDITY::connect_to_server(const char* hostname, unsigned short tcp_port) { int fd; struct sockaddr_in in; unsigned int addr; /* create socket */ if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { warning("TiMidity: socket(): %s", strerror(errno)); return -1; } /* connect */ memset(&in, 0, sizeof(in)); in.sin_family = AF_INET; in.sin_port = htons(tcp_port); addr = host_to_addr(hostname); memcpy(&in.sin_addr, &addr, 4); if (connect(fd, (struct sockaddr *)&in, sizeof(in)) < 0) { warning("TiMidity: connect(): %s", strerror(errno)); return -1; } return fd; } char *MidiDriver_TIMIDITY::timidity_ctl_command(const char *fmt, ...) { /* XXX: I don't like this static buffer!!! */ static char buff[BUFSIZ]; int status, len; va_list ap; if (fmt != NULL) { /* if argumends are present, write them to control connection */ va_start(ap, fmt); len = vsnprintf(buff, BUFSIZ-1, fmt, ap); /* leave one byte for \n */ va_end(ap); /* add newline if needed */ if (len > 0 && buff[len - 1] != '\n') buff[len++] = '\n'; /* write command to control socket */ write(_control_fd, buff, len); } while (1) { /* read reply */ if (fdgets(buff, sizeof(buff)) <= 0) { strcpy(buff, "Read error\n"); break; } /* report errors from server */ status = atoi(buff); if (400 <= status && status <= 499) { /* Error of data stream */ warning("TiMidity: error from server: %s", buff); continue; } break; } return buff; } void MidiDriver_TIMIDITY::timidity_meta_seq(int p1, int p2, int p3) { /* see _CHN_COMMON from soundcard.h; this is simplified * to just send seq to the server without any buffers, * delays and extra functions/macros */ u_char seqbuf[8]; seqbuf[0] = 0x92; seqbuf[1] = 0; seqbuf[2] = 0xff; seqbuf[3] = 0x7f; seqbuf[4] = p1; seqbuf[5] = p2; *(short *)&seqbuf[6] = p3; timidity_write_data(seqbuf, sizeof(seqbuf)); } int MidiDriver_TIMIDITY::timidity_sync(int centsec) { char *res; int status; unsigned long sleep_usec; timidity_meta_seq(0x02, 0x00, centsec); /* Wait playout */ /* Wait "301 Sync OK" */ do { res = timidity_ctl_command(NULL); status = atoi(res); if (status != 301) warning("TiMidity: error: SYNC: %s", res); } while (status && status != 301); if (status != 301) return -1; /* error */ sleep_usec = (unsigned long)(atof(res + 4) * 1000000); if (sleep_usec > 0) usleep(sleep_usec); return 0; } int MidiDriver_TIMIDITY::timidity_eot(void) { timidity_meta_seq(0x00, 0x00, 0); /* End of playing */ return timidity_sync(0); } void MidiDriver_TIMIDITY::timidity_write_data(const void *buf, size_t nbytes) { /* nowhere to write... */ if (_data_fd < 0) return; /* write, and disable everything if write failed */ /* TODO: add reconnect? */ if (write(_data_fd, buf, nbytes) == -1) { warning("TiMidity: DATA WRITE FAILED (%s), DISABLING MUSIC OUTPUT", strerror(errno)); close_all(); } } int MidiDriver_TIMIDITY::fdgets(char *buff, size_t buff_size) { int n, len, count, size; char *buff_endp = buff + buff_size - 1, *pbuff, *beg; len = 0; count = _controlbuffer_count; size = _controlbuffer_size; pbuff = _controlbuffer; beg = buff; do { if (count == size) { if ((n = read(_control_fd, pbuff, BUFSIZ)) <= 0) { *buff = '\0'; if (n == 0) { _controlbuffer_count = _controlbuffer_size = 0; return buff - beg; } return -1; /* < 0 error */ } count = _controlbuffer_count = 0; size = _controlbuffer_size = n; } *buff++ = pbuff[count++]; } while (*(buff - 1) != '\n' && buff != buff_endp); *buff = '\0'; _controlbuffer_count = count; return buff - beg; } void MidiDriver_TIMIDITY::send(uint32 b) { unsigned char buf[256]; int position = 0; switch (b & 0xF0) { case 0x80: case 0x90: case 0xA0: case 0xB0: case 0xE0: buf[position++] = SEQ_MIDIPUTC; buf[position++] = (unsigned char)b; buf[position++] = _device_num; buf[position++] = 0; buf[position++] = SEQ_MIDIPUTC; buf[position++] = (unsigned char)((b >> 8) & 0x7F); buf[position++] = _device_num; buf[position++] = 0; buf[position++] = SEQ_MIDIPUTC; buf[position++] = (unsigned char)((b >> 16) & 0x7F); buf[position++] = _device_num; buf[position++] = 0; break; case 0xC0: case 0xD0: buf[position++] = SEQ_MIDIPUTC; buf[position++] = (unsigned char)b; buf[position++] = _device_num; buf[position++] = 0; buf[position++] = SEQ_MIDIPUTC; buf[position++] = (unsigned char)((b >> 8) & 0x7F); buf[position++] = _device_num; buf[position++] = 0; break; default: warning("MidiDriver_TIMIDITY::send: unknown : %08x", (int)b); break; } timidity_write_data(buf, position); } void MidiDriver_TIMIDITY::sysEx(const byte *msg, uint16 length) { fprintf(stderr, "Timidity::sysEx\n"); unsigned char buf[1024]; int position = 0; const byte *chr = msg; assert(length + 2 <= 256); buf[position++] = SEQ_MIDIPUTC; buf[position++] = 0xF0; buf[position++] = _device_num; buf[position++] = 0; for (; length; --length, ++chr) { buf[position++] = SEQ_MIDIPUTC; buf[position++] = (unsigned char) *chr & 0x7F; buf[position++] = _device_num; buf[position++] = 0; } buf[position++] = SEQ_MIDIPUTC; buf[position++] = 0xF7; buf[position++] = _device_num; buf[position++] = 0; timidity_write_data(buf, position); } MidiDriver *MidiDriver_TIMIDITY_create() { return new MidiDriver_TIMIDITY(); } #endif // defined (UNIX)