diff options
Diffstat (limited to '3rdparty/portaudio/qa/loopback/src/paqa_tools.c')
| -rw-r--r-- | 3rdparty/portaudio/qa/loopback/src/paqa_tools.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/3rdparty/portaudio/qa/loopback/src/paqa_tools.c b/3rdparty/portaudio/qa/loopback/src/paqa_tools.c new file mode 100644 index 0000000..2e44c63 --- /dev/null +++ b/3rdparty/portaudio/qa/loopback/src/paqa_tools.c @@ -0,0 +1,171 @@ + +/* + * PortAudio Portable Real-Time Audio Library + * Latest Version at: http://www.portaudio.com + * + * Copyright (c) 1999-2010 Phil Burk and Ross Bencina + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files + * (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, + * publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF + * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +/* + * The text above constitutes the entire PortAudio license; however, + * the PortAudio community also makes the following non-binding requests: + * + * Any person wishing to distribute modifications to the Software is + * requested to send the modifications to the original developer so that + * they can be incorporated into the canonical version. It is also + * requested that these non-binding requests be included along with the + * license above. + */ + +#include "paqa_tools.h" + + +/*******************************************************************/ +void PaQa_ListAudioDevices(void) +{ + int i, numDevices; + const PaDeviceInfo *deviceInfo; + numDevices = Pa_GetDeviceCount(); + for( i=0; i<numDevices; i++ ) + { + deviceInfo = Pa_GetDeviceInfo( i ); + printf( "#%d: ", i ); + printf( "%2d in", deviceInfo->maxInputChannels ); + printf( ", %2d out", deviceInfo->maxOutputChannels ); + printf( ", %s", deviceInfo->name ); + printf( ", on %s\n", Pa_GetHostApiInfo( deviceInfo->hostApi )->name ); + } +} + +/*******************************************************************/ +void PaQa_ConvertToFloat( const void *input, int numSamples, PaSampleFormat inFormat, float *output ) +{ + int i; + switch( inFormat ) + { + case paUInt8: + { + unsigned char *data = (unsigned char *)input; + for( i=0; i<numSamples; i++ ) + { + int value = *data++; + value -= 128; + *output++ = value / 128.0f; + } + } + break; + + case paInt8: + { + char *data = (char *)input; + for( i=0; i<numSamples; i++ ) + { + int value = *data++; + *output++ = value / 128.0f; + } + } + break; + + case paInt16: + { + short *data = (short *)input; + for( i=0; i<numSamples; i++ ) + { + *output++ = *data++ / 32768.0f; + } + } + break; + + case paInt32: + { + int *data = (int *)input; + for( i=0; i<numSamples; i++ ) + { + int value = (*data++) >> 8; + float fval = (float) (value / ((double) 0x00800000)); + *output++ = fval; + } + } + break; + } + +} + +/*******************************************************************/ +void PaQa_ConvertFromFloat( const float *input, int numSamples, PaSampleFormat outFormat, void *output ) +{ + int i; + switch( outFormat ) + { + case paUInt8: + { + unsigned char *data = (unsigned char *)output; + for( i=0; i<numSamples; i++ ) + { + float value = *input++; + int byte = ((int) (value * 127)) + 128; + *data++ = (unsigned char) byte; + } + } + break; + + case paInt8: + { + char *data = (char *)output; + for( i=0; i<numSamples; i++ ) + { + float value = *input++; + int byte = (int) (value * 127); + *data++ = (char) byte; + } + } + break; + + case paInt16: + { + short *data = (short *)output; + for( i=0; i<numSamples; i++ ) + { + float value = *input++; + // Use asymmetric conversion to avoid clipping. + short sval = value * 32767.0; + *data++ = sval; + } + } + break; + + case paInt32: + { + int *data = (int *)output; + for( i=0; i<numSamples; i++ ) + { + float value = *input++; + // Use asymmetric conversion to avoid clipping. + int ival = value * ((double) 0x007FFFF0); + ival = ival << 8; + *data++ = ival; + } + } + break; + } + +} |