CLAM-Development
1.1
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00001 /* 00002 * Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG) 00003 * UNIVERSITAT POMPEU FABRA 00004 * 00005 * 00006 * This program is free software; you can redistribute it and/or modify 00007 * it under the terms of the GNU General Public License as published by 00008 * the Free Software Foundation; either version 2 of the License, or 00009 * (at your option) any later version. 00010 * 00011 * This program is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU General Public License 00017 * along with this program; if not, write to the Free Software 00018 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00019 * 00020 */ 00021 00022 #include <portaudio.h> 00023 #include "PAAudioFullDuplexStream.hxx" 00024 #include "PortAudioUtils.hxx" 00025 #include "Assert.hxx" 00026 00027 namespace CLAM 00028 { 00029 00030 void PAAudioFullDuplexStream::SetupStream() 00031 { 00032 PaError errval; 00033 00034 CheckConsistency(); 00035 00036 PaStreamParameters in_stream_params; 00037 in_stream_params.device = mConfig.GetDeviceID(); 00038 in_stream_params.channelCount = mConfig.GetChannelNumber(); 00039 in_stream_params.sampleFormat = paInt16; 00040 in_stream_params.suggestedLatency = Pa_GetDeviceInfo(in_stream_params.device)->defaultLowInputLatency; 00041 in_stream_params.hostApiSpecificStreamInfo = NULL; 00042 00043 PaStreamParameters out_stream_params; 00044 out_stream_params.device = mConfig.GetDeviceID(); 00045 out_stream_params.channelCount = mConfig.GetChannelNumber(); 00046 out_stream_params.sampleFormat = paInt16; 00047 out_stream_params.suggestedLatency = Pa_GetDeviceInfo(out_stream_params.device)->defaultLowOutputLatency; 00048 out_stream_params.hostApiSpecificStreamInfo = NULL; 00049 00050 errval = Pa_OpenStream( 00051 &mStream, 00052 &in_stream_params, 00053 &out_stream_params, 00054 mConfig.GetSampleRate(), 00055 mConfig.GetDblBuffer()->GetSize()/mConfig.GetChannelNumber(), 00056 0, 00057 mConfig.GetCallback(), 00058 mConfig.GetDblBuffer() ); 00059 00060 CHECK_PA_ERROR( "Error opening the stream: ", errval ); 00061 } 00062 00063 void PAAudioFullDuplexStream::CheckConsistency() 00064 { 00065 const PaDeviceInfo* devnfo = Pa_GetDeviceInfo( mConfig.GetDeviceID() ); 00066 00067 if ( devnfo == NULL ) 00068 throw ErrPortAudio("Error opening stream\nThe device id is not valid"); 00069 00070 PaStreamParameters params; 00071 params.device = mConfig.GetDeviceID(); 00072 params.channelCount = mConfig.GetChannelNumber(); 00073 params.sampleFormat = paInt16; 00074 params.suggestedLatency = 0; 00075 params.hostApiSpecificStreamInfo = 0; 00076 00077 bool isSupported = (Pa_IsFormatSupported(¶ms, ¶ms, mConfig.GetSampleRate()) ? false : true); 00078 00079 // Requested sample rate is not supported 00080 if ( !isSupported ) 00081 throw ErrPortAudio( "Error opening the stream:\nRequested Sample rate not supported by the device" ); 00082 00083 // These ones are asserts 00084 CLAM_ASSERT( mConfig.GetDblBuffer()!=NULL, "The double buffer for the stream cannot be nil!" ); 00085 CLAM_ASSERT( mConfig.GetCallback()!=NULL, "The callback for the stream is nil!" ); 00086 } 00087 00088 } 00089