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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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%{ |
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#include "lscpparser.h" |
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#include "lscpserver.h" |
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// as we need an reentrant scanner, we have to pass the pointer to the scanner with each yylex() call |
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#define YYLEX_PARAM ((yyparse_param_t*) yyparse_param)->pScanner |
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// to save us typing work in the rules action definitions |
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#define LSCPSERVER ((yyparse_param_t*) yyparse_param)->pServer |
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// clears input buffer and restarts scanner. |
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void restart(yyparse_param_t* pparam, int& yychar); |
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#define RESTART restart((yyparse_param_t*) YYPARSE_PARAM, yychar) |
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// external reference to the main scanner function yylex() |
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extern YY_DECL; |
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// external reference to restart the lex scanner |
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extern void yyrestart(FILE* input_file, yyscan_t yyscanner); |
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// we provide our own version of yyerror() so we don't have to link against the yacc library |
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void yyerror(const char* s); |
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%} |
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// reentrant parser |
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%pure_parser |
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%token <Char> CHAR |
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%token <Dotnum> DOTNUM |
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%token <Number> NUMBER |
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%token SP LF CR HASH |
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%token ADD GET LOAD REMOVE SET SUBSCRIBE UNSUBSCRIBE RESET QUIT |
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%token CHANNEL NOTIFICATION |
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%token AVAILABLE_ENGINES CHANNELS INFO BUFFER_FILL STREAM_COUNT VOICE_COUNT |
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%token INSTRUMENT ENGINE |
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%token AUDIO_OUTPUT_CHANNEL AUDIO_OUTPUT_TYPE MIDI_INPUT_PORT MIDI_INPUT_CHANNEL MIDI_INPUT_TYPE VOLUME |
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%token BYTES PERCENTAGE |
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%token ALSA JACK |
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%type <Dotnum> volume |
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%type <Number> sampler_channel instrument_index udp_port audio_output_channel midi_input_channel |
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%type <String> string alpha_num_string filename engine_name session_id midi_input_port command get_instruction load_instruction set_chan_instruction load_instr_args load_engine_args |
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%type <FillResponse> buffer_size_type |
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%type <AudioOutput> audio_output_type |
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%type <MidiInput> midi_input_type |
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%start input |
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%% |
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//TODO: return more meaningful error messages |
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input : line |
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| input LF line |
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| input CR LF line |
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; |
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line : /* epsilon (empty line ignored) */ |
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| comment |
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| command { LSCPSERVER->AnswerClient($1); } |
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| error { LSCPSERVER->AnswerClient("Err:0:Unknown command.\r\n"); RESTART; return LSCP_SYNTAX_ERROR; } |
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; |
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comment : HASH |
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| comment HASH |
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| comment SP |
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| comment NUMBER |
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| comment string |
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; |
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command : ADD SP CHANNEL { $$ = LSCPSERVER->AddChannel(); } |
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| GET SP get_instruction { $$ = $3; } |
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| LOAD SP load_instruction { $$ = $3; } |
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| REMOVE SP CHANNEL SP sampler_channel { $$ = LSCPSERVER->RemoveChannel($5); } |
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| SET SP CHANNEL SP set_chan_instruction { $$ = $5; } |
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| SUBSCRIBE SP NOTIFICATION SP udp_port { $$ = LSCPSERVER->SubscribeNotification($5); } |
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| UNSUBSCRIBE SP NOTIFICATION SP session_id { $$ = LSCPSERVER->UnsubscribeNotification($5); } |
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| RESET SP CHANNEL SP sampler_channel { $$ = LSCPSERVER->ResetChannel($5); } |
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| QUIT { LSCPSERVER->AnswerClient("Bye!\r\n"); return 0; } |
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; |
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get_instruction : AVAILABLE_ENGINES { $$ = LSCPSERVER->GetAvailableEngines(); } |
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| CHANNELS { $$ = LSCPSERVER->GetChannels(); } |
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| CHANNEL SP INFO SP sampler_channel { $$ = LSCPSERVER->GetChannelInfo($5); } |
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| CHANNEL SP BUFFER_FILL SP buffer_size_type SP sampler_channel { $$ = LSCPSERVER->GetBufferFill($5, $7); } |
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| CHANNEL SP STREAM_COUNT SP sampler_channel { $$ = LSCPSERVER->GetStreamCount($5); } |
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| CHANNEL SP VOICE_COUNT SP sampler_channel { $$ = LSCPSERVER->GetVoiceCount($5); } |
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| ENGINE SP INFO SP engine_name { $$ = LSCPSERVER->GetEngineInfo($5); } |
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; |
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load_instruction : INSTRUMENT SP load_instr_args { $$ = $3; } |
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| ENGINE SP load_engine_args { $$ = $3; } |
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; |
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set_chan_instruction : AUDIO_OUTPUT_CHANNEL SP sampler_channel SP audio_output_channel { $$ = LSCPSERVER->SetAudioOutputChannel($5, $3); } |
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| AUDIO_OUTPUT_TYPE SP sampler_channel SP audio_output_type { $$ = LSCPSERVER->SetAudioOutputType($5, $3); } |
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| MIDI_INPUT_PORT SP sampler_channel SP midi_input_port { $$ = LSCPSERVER->SetMIDIInputPort($5, $3); } |
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| MIDI_INPUT_CHANNEL SP sampler_channel SP midi_input_channel { $$ = LSCPSERVER->SetMIDIInputChannel($5, $3); } |
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| MIDI_INPUT_TYPE SP sampler_channel SP midi_input_type { $$ = LSCPSERVER->SetMIDIInputType($5, $3); } |
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| VOLUME SP sampler_channel SP volume { $$ = LSCPSERVER->SetVolume($5, $3); } |
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; |
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buffer_size_type : BYTES { $$ = fill_response_bytes; } |
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| PERCENTAGE { $$ = fill_response_percentage; } |
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; |
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load_instr_args : filename SP instrument_index SP sampler_channel { $$ = LSCPSERVER->LoadInstrument($1, $3, $5); } |
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; |
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load_engine_args : engine_name SP sampler_channel { $$ = LSCPSERVER->LoadEngine($1, $3); } |
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; |
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audio_output_type : ALSA { $$ = AudioOutputDevice::type_alsa; } |
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| JACK { $$ = AudioOutputDevice::type_jack; } |
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; |
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midi_input_type : ALSA { $$ = MidiInputDevice::type_alsa; } |
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; |
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volume : DOTNUM |
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| NUMBER { $$ = $1; } |
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sampler_channel : NUMBER |
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instrument_index : NUMBER |
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udp_port : NUMBER |
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audio_output_channel : NUMBER |
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midi_input_channel : NUMBER |
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; |
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session_id : alpha_num_string |
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engine_name : string |
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midi_input_port : alpha_num_string |
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; |
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filename : alpha_num_string |
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| filename SP alpha_num_string { $$ = $1 + ' ' + $3; } |
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; |
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alpha_num_string : string { $$ = $1; } |
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| NUMBER { std::stringstream ss; ss << $1; $$ = ss.str(); } |
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| alpha_num_string string { $$ = $1 + $2; } |
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| alpha_num_string NUMBER { std::stringstream ss; ss << $1 << $2; $$ = ss.str(); } |
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; |
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string : CHAR { std::string s; s = $1; $$ = s; } |
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| string CHAR { $$ = $1 + $2; } |
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; |
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%% |
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/** |
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* Will be called when an error occured (usually syntax error). |
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*/ |
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void yyerror(const char* s) { |
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dmsg(2,("LSCPParser: %s\n", s)); |
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} |
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/** |
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* Clears input buffer and restarts scanner. |
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*/ |
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void restart(yyparse_param_t* pparam, int& yychar) { |
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// restart scanner |
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yyrestart(stdin, pparam->pScanner); |
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// flush input buffer |
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static char buf[1024]; |
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while(recv(hSession, buf, 1024, MSG_DONTWAIT) > 0); |
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// reset lookahead symbol |
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yyclearin; |
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} |
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