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Diffstat (limited to 'portaudio/test/patest_converters.c')
| -rw-r--r-- | portaudio/test/patest_converters.c | 395 |
1 files changed, 0 insertions, 395 deletions
diff --git a/portaudio/test/patest_converters.c b/portaudio/test/patest_converters.c deleted file mode 100644 index f76738c..0000000 --- a/portaudio/test/patest_converters.c +++ /dev/null @@ -1,395 +0,0 @@ -/** @file patest_converters.c - @ingroup test_src - @brief Tests the converter functions in pa_converters.c - @author Ross Bencina <rossb@audiomulch.com> - - Link with pa_dither.c and pa_converters.c - - see http://www.portaudio.com/trac/wiki/V19ConvertersStatus for a discussion of this. -*/ -/* - * $Id: $ - * - * This program uses the PortAudio Portable Audio Library. - * For more information see: http://www.portaudio.com/ - * Copyright (c) 1999-2008 Ross Bencina and Phil Burk - * - * 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 <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <math.h> - -#include "portaudio.h" -#include "pa_converters.h" -#include "pa_dither.h" -#include "pa_types.h" -#include "pa_endianness.h" - -#ifndef M_PI -#define M_PI (3.14159265) -#endif - -#define MAX_PER_CHANNEL_FRAME_COUNT (2048) -#define MAX_CHANNEL_COUNT (8) - - -#define SAMPLE_FORMAT_COUNT (6) - -static PaSampleFormat sampleFormats_[ SAMPLE_FORMAT_COUNT ] = - { paFloat32, paInt32, paInt24, paInt16, paInt8, paUInt8 }; /* all standard PA sample formats */ - -static const char* sampleFormatNames_[SAMPLE_FORMAT_COUNT] = - { "paFloat32", "paInt32", "paInt24", "paInt16", "paInt8", "paUInt8" }; - - -static const char* abbreviatedSampleFormatNames_[SAMPLE_FORMAT_COUNT] = - { "f32", "i32", "i24", "i16", " i8", "ui8" }; - - -PaError My_Pa_GetSampleSize( PaSampleFormat format ); - -/* - available flags are paClipOff and paDitherOff - clipping is usually applied for float -> int conversions - dither is usually applied for all downconversions (ie anything but 8bit->8bit conversions -*/ - -static int CanClip( PaSampleFormat sourceFormat, PaSampleFormat destinationFormat ) -{ - if( sourceFormat == paFloat32 && destinationFormat != sourceFormat ) - return 1; - else - return 0; -} - -static int CanDither( PaSampleFormat sourceFormat, PaSampleFormat destinationFormat ) -{ - if( sourceFormat < destinationFormat && sourceFormat != paInt8 ) - return 1; - else - return 0; -} - -static void GenerateOneCycleSineReference( double *out, int frameCount, int strideFrames ) -{ - int i; - for( i=0; i < frameCount; ++i ){ - *out = sin( ((double)i/(double)frameCount) * 2. * M_PI ); - out += strideFrames; - } -} - - -static void GenerateOneCycleSine( PaSampleFormat format, void *buffer, int frameCount, int strideFrames ) -{ - switch( format ){ - - case paFloat32: - { - int i; - float *out = (float*)buffer; - for( i=0; i < frameCount; ++i ){ - *out = (float).9 * sin( ((double)i/(double)frameCount) * 2. * M_PI ); - out += strideFrames; - } - } - break; - case paInt32: - { - int i; - PaInt32 *out = (PaInt32*)buffer; - for( i=0; i < frameCount; ++i ){ - *out = (PaInt32)(.9 * sin( ((double)i/(double)frameCount) * 2. * M_PI ) * 0x7FFFFFFF); - out += strideFrames; - } - } - break; - case paInt24: - { - int i; - unsigned char *out = (unsigned char*)buffer; - for( i=0; i < frameCount; ++i ){ - signed long temp = (PaInt32)(.9 * sin( ((double)i/(double)frameCount) * 2. * M_PI ) * 0x7FFFFFFF); - - #if defined(PA_LITTLE_ENDIAN) - out[0] = (unsigned char)(temp >> 8) & 0xFF; - out[1] = (unsigned char)(temp >> 16) & 0xFF; - out[2] = (unsigned char)(temp >> 24) & 0xFF; - #elif defined(PA_BIG_ENDIAN) - out[0] = (unsigned char)(temp >> 24) & 0xFF; - out[1] = (unsigned char)(temp >> 16) & 0xFF; - out[2] = (unsigned char)(temp >> 8) & 0xFF; - #endif - out += 3; - } - } - break; - case paInt16: - { - int i; - PaInt16 *out = (PaInt16*)buffer; - for( i=0; i < frameCount; ++i ){ - *out = (PaInt16)(.9 * sin( ((double)i/(double)frameCount) * 2. * M_PI ) * 0x7FFF ); - out += strideFrames; - } - } - break; - case paInt8: - { - int i; - signed char *out = (signed char*)buffer; - for( i=0; i < frameCount; ++i ){ - *out = (signed char)(.9 * sin( ((double)i/(double)frameCount) * 2. * M_PI ) * 0x7F ); - out += strideFrames; - } - } - break; - case paUInt8: - { - int i; - unsigned char *out = (unsigned char*)buffer; - for( i=0; i < frameCount; ++i ){ - *out = (unsigned char)( .5 * (1. + (.9 * sin( ((double)i/(double)frameCount) * 2. * M_PI ))) * 0xFF ); - out += strideFrames; - } - } - break; - } -} - -int TestNonZeroPresent( void *buffer, int size ) -{ - char *p = (char*)buffer; - int i; - - for( i=0; i < size; ++i ){ - - if( *p != 0 ) - return 1; - ++p; - } - - return 0; -} - -float MaximumAbsDifference( float* sourceBuffer, float* referenceBuffer, int count ) -{ - float result = 0; - float difference; - while( count-- ){ - difference = fabs( *sourceBuffer++ - *referenceBuffer++ ); - if( difference > result ) - result = difference; - } - - return result; -} - -int main( const char **argv, int argc ) -{ - PaUtilTriangularDitherGenerator ditherState; - PaUtilConverter *converter; - void *destinationBuffer, *sourceBuffer; - double *referenceBuffer; - int sourceFormatIndex, destinationFormatIndex; - PaSampleFormat sourceFormat, destinationFormat; - PaStreamFlags flags; - int passFailMatrix[SAMPLE_FORMAT_COUNT][SAMPLE_FORMAT_COUNT]; // [source][destination] - float noiseAmplitudeMatrix[SAMPLE_FORMAT_COUNT][SAMPLE_FORMAT_COUNT]; // [source][destination] - float amp; - -#define FLAG_COMBINATION_COUNT (4) - PaStreamFlags flagCombinations[FLAG_COMBINATION_COUNT] = { paNoFlag, paClipOff, paDitherOff, paClipOff | paDitherOff }; - const char *flagCombinationNames[FLAG_COMBINATION_COUNT] = { "paNoFlag", "paClipOff", "paDitherOff", "paClipOff | paDitherOff" }; - int flagCombinationIndex; - - PaUtil_InitializeTriangularDitherState( &ditherState ); - - /* allocate more than enough space, we use sizeof(float) but we need to fit any 32 bit datum */ - - destinationBuffer = (void*)malloc( MAX_PER_CHANNEL_FRAME_COUNT * MAX_CHANNEL_COUNT * sizeof(float) ); - sourceBuffer = (void*)malloc( MAX_PER_CHANNEL_FRAME_COUNT * MAX_CHANNEL_COUNT * sizeof(float) ); - referenceBuffer = (void*)malloc( MAX_PER_CHANNEL_FRAME_COUNT * MAX_CHANNEL_COUNT * sizeof(float) ); - - - /* the first round of tests simply iterates through the buffer combinations testing - that putting something in gives something out */ - - printf( "= Sine wave in, something out =\n" ); - - printf( "\n" ); - - GenerateOneCycleSine( paFloat32, referenceBuffer, MAX_PER_CHANNEL_FRAME_COUNT, 1 ); - - for( flagCombinationIndex = 0; flagCombinationIndex < FLAG_COMBINATION_COUNT; ++flagCombinationIndex ){ - flags = flagCombinations[flagCombinationIndex]; - - printf( "\n" ); - printf( "== flags = %s ==\n", flagCombinationNames[flagCombinationIndex] ); - - for( sourceFormatIndex = 0; sourceFormatIndex < SAMPLE_FORMAT_COUNT; ++sourceFormatIndex ){ - for( destinationFormatIndex = 0; destinationFormatIndex < SAMPLE_FORMAT_COUNT; ++destinationFormatIndex ){ - sourceFormat = sampleFormats_[sourceFormatIndex]; - destinationFormat = sampleFormats_[destinationFormatIndex]; - //printf( "%s -> %s ", sampleFormatNames_[ sourceFormatIndex ], sampleFormatNames_[ destinationFormatIndex ] ); - - converter = PaUtil_SelectConverter( sourceFormat, destinationFormat, flags ); - - /* source is a sinewave */ - GenerateOneCycleSine( sourceFormat, sourceBuffer, MAX_PER_CHANNEL_FRAME_COUNT, 1 ); - - /* zero destination */ - memset( destinationBuffer, 0, MAX_PER_CHANNEL_FRAME_COUNT * My_Pa_GetSampleSize( destinationFormat ) ); - - (*converter)( destinationBuffer, 1, sourceBuffer, 1, MAX_PER_CHANNEL_FRAME_COUNT, &ditherState ); - - /* - Other ways we could test this would be: - - pass a constant, check for a constant (wouldn't work with dither) - - pass alternating +/-, check for the same... - */ - if( TestNonZeroPresent( destinationBuffer, MAX_PER_CHANNEL_FRAME_COUNT * My_Pa_GetSampleSize( destinationFormat ) ) ){ - //printf( "PASSED\n" ); - passFailMatrix[sourceFormatIndex][destinationFormatIndex] = 1; - }else{ - //printf( "FAILED\n" ); - passFailMatrix[sourceFormatIndex][destinationFormatIndex] = 0; - } - - - /* try to measure the noise floor (comparing output signal to a float32 sine wave) */ - - if( passFailMatrix[sourceFormatIndex][destinationFormatIndex] ){ - - /* convert destination back to paFloat32 into source */ - converter = PaUtil_SelectConverter( destinationFormat, paFloat32, paNoFlag ); - - memset( sourceBuffer, 0, MAX_PER_CHANNEL_FRAME_COUNT * My_Pa_GetSampleSize( paFloat32 ) ); - (*converter)( sourceBuffer, 1, destinationBuffer, 1, MAX_PER_CHANNEL_FRAME_COUNT, &ditherState ); - - if( TestNonZeroPresent( sourceBuffer, MAX_PER_CHANNEL_FRAME_COUNT * My_Pa_GetSampleSize( paFloat32 ) ) ){ - - noiseAmplitudeMatrix[sourceFormatIndex][destinationFormatIndex] = MaximumAbsDifference( (float*)sourceBuffer, (float*)referenceBuffer, MAX_PER_CHANNEL_FRAME_COUNT ); - - }else{ - /* can't test noise floor because there is no conversion from dest format to float available */ - noiseAmplitudeMatrix[sourceFormatIndex][destinationFormatIndex] = -1; // mark as failed - } - }else{ - noiseAmplitudeMatrix[sourceFormatIndex][destinationFormatIndex] = -1; // mark as failed - } - } - } - - printf( "\n" ); - printf( "=== Output contains non-zero data ===\n" ); - printf( "Key: . - pass, X - fail\n" ); - printf( "{{{\n" ); // trac preformated text tag - printf( "in| out: " ); - for( destinationFormatIndex = 0; destinationFormatIndex < SAMPLE_FORMAT_COUNT; ++destinationFormatIndex ){ - printf( " %s ", abbreviatedSampleFormatNames_[destinationFormatIndex] ); - } - printf( "\n" ); - - for( sourceFormatIndex = 0; sourceFormatIndex < SAMPLE_FORMAT_COUNT; ++sourceFormatIndex ){ - printf( "%s ", abbreviatedSampleFormatNames_[sourceFormatIndex] ); - for( destinationFormatIndex = 0; destinationFormatIndex < SAMPLE_FORMAT_COUNT; ++destinationFormatIndex ){ - printf( " %s ", (passFailMatrix[sourceFormatIndex][destinationFormatIndex])? " ." : " X" ); - } - printf( "\n" ); - } - printf( "}}}\n" ); // trac preformated text tag - - printf( "\n" ); - printf( "=== Combined dynamic range (src->dest->float32) ===\n" ); - printf( "Key: Noise amplitude in dBfs, X - fail (either above failed or dest->float32 failed)\n" ); - printf( "{{{\n" ); // trac preformated text tag - printf( "in| out: " ); - for( destinationFormatIndex = 0; destinationFormatIndex < SAMPLE_FORMAT_COUNT; ++destinationFormatIndex ){ - printf( " %s ", abbreviatedSampleFormatNames_[destinationFormatIndex] ); - } - printf( "\n" ); - - for( sourceFormatIndex = 0; sourceFormatIndex < SAMPLE_FORMAT_COUNT; ++sourceFormatIndex ){ - printf( " %s ", abbreviatedSampleFormatNames_[sourceFormatIndex] ); - for( destinationFormatIndex = 0; destinationFormatIndex < SAMPLE_FORMAT_COUNT; ++destinationFormatIndex ){ - amp = noiseAmplitudeMatrix[sourceFormatIndex][destinationFormatIndex]; - if( amp < 0. ) - printf( " X " ); - else - printf( " % 6.1f ", 20.*log10(amp) ); - } - printf( "\n" ); - } - printf( "}}}\n" ); // trac preformated text tag - } - - - free( destinationBuffer ); - free( sourceBuffer ); - free( referenceBuffer ); -} - -// copied here for now otherwise we need to include the world just for this function. -PaError My_Pa_GetSampleSize( PaSampleFormat format ) -{ - int result; - - switch( format & ~paNonInterleaved ) - { - - case paUInt8: - case paInt8: - result = 1; - break; - - case paInt16: - result = 2; - break; - - case paInt24: - result = 3; - break; - - case paFloat32: - case paInt32: - result = 4; - break; - - default: - result = paSampleFormatNotSupported; - break; - } - - return (PaError) result; -} |