136 lines
3.8 KiB
C
136 lines
3.8 KiB
C
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/*******************************************************************************/
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/* Copyright (C) 2008 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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#include <netdb.h>
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#include <netinet/in.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <sys/select.h>
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#include "Peak_Client.H"
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/* An interface to the peak server */
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#define PEAK_PORT 6111
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int
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connect_to_host ( const char *host, int port )
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{
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int s;
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struct sockaddr_in sa;
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struct hostent *hp;
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memset( &sa, 0, sizeof( sa ) );
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hp = gethostbyname( host );
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sa.sin_family = hp->h_addrtype;
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sa.sin_port = htons( port );
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sa.sin_addr.s_addr = INADDR_ANY;
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if ( ( s = socket( AF_INET, SOCK_STREAM, 0 ) ) < 0 )
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{
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perror( "socket()" );
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return -1;
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}
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if ( connect( s, (struct sockaddr *)&sa, sizeof( sa ) ) < 0 )
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{
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perror( "connect()" );
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close( s );
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return -1;
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}
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return s;
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}
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bool
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Peak_Client::connect ( const char *host )
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{
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if ( ( _socket = connect_to_host( host, PEAK_PORT ) ) < 0 )
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return false;
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return true;
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}
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bool
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Peak_Client::get_info ( const char *source, nframes_t *len, int *channels )
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{
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/* FIXME: needs to handle errors/reconnect */
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char buf[512];
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snprintf( buf, sizeof( buf ), "get_info \"%s\"\n", source );
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send( _socket, buf, strlen( buf ), 0 );
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recv( _socket, buf, sizeof( buf ), 0 );
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if ( sscanf( buf, "length=%lu channels=%d", len, channels ) != 2 )
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return false;
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return true;
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}
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bool
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Peak_Client::read_peaks ( const char *source, float fpp, nframes_t start, nframes_t end,
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int *peaks, Peak **pbuf, int *channels )
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{
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/* FIXME: needs to handle errors/reconnect */
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char buf[512];
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snprintf( buf, sizeof( buf ), "read_peaks \"%s\" %f %lu %lu\n", source, fpp, start, end );
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send( _socket, buf, strlen( buf ), 0 );
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if ( recv( _socket, buf, sizeof( int ) * 2, 0 ) != sizeof( int ) * 2 )
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{
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printf( "error!\n" );
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return false;
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}
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if ( ! strncmp( buf, "error", 5 ) )
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return false;
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*channels = ((int*)buf)[0];
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*peaks = ((int*)buf)[1];
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if ( ! ( *peaks && *channels ) )
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/* unknown error */;
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printf( "reading %d peaks for %d channels\n", *peaks, *channels );
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*pbuf = new Peak[ *peaks * *channels ];
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for ( int i = 0; i < *channels; ++i )
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recv( _socket, *pbuf + (i * *peaks), *peaks * sizeof( Peak ), MSG_WAITALL );
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printf( "done.\n" );
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return true;
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}
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