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diff --git a/portaudio/qa/loopback/src/paqa.c b/portaudio/qa/loopback/src/paqa.c
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+
+/*
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <memory.h>
+#include <math.h>
+#include <string.h>
+
+#include "portaudio.h"
+
+#include "qa_tools.h"
+
+#include "paqa_tools.h"
+#include "audio_analyzer.h"
+#include "test_audio_analyzer.h"
+
+/** Accumulate counts for how many tests pass or fail. */
+int g_testsPassed = 0;
+int g_testsFailed = 0;
+
+#define MAX_NUM_GENERATORS (8)
+#define MAX_NUM_RECORDINGS (8)
+#define MAX_BACKGROUND_NOISE_RMS (0.0004)
+#define LOOPBACK_DETECTION_DURATION_SECONDS (0.8)
+#define DEFAULT_FRAMES_PER_BUFFER (0)
+#define PAQA_WAIT_STREAM_MSEC (100)
+#define PAQA_TEST_DURATION (1.2)
+
+// Use two separate streams instead of one full duplex stream.
+#define PAQA_FLAG_TWO_STREAMS (1<<0)
+// Use bloching read/write for loopback.
+#define PAQA_FLAG_USE_BLOCKING_IO (1<<1)
+
+const char * s_FlagOnNames[] =
+{
+ "Two Streams (Half Duplex)",
+ "Blocking Read/Write"
+};
+
+const char * s_FlagOffNames[] =
+{
+ "One Stream (Full Duplex)",
+ "Callback"
+};
+
+
+/** Parameters that describe a single test run. */
+typedef struct TestParameters_s
+{
+ PaStreamParameters inputParameters;
+ PaStreamParameters outputParameters;
+ double sampleRate;
+ int samplesPerFrame;
+ int framesPerBuffer;
+ int maxFrames;
+ double baseFrequency;
+ double amplitude;
+ PaStreamFlags streamFlags; // paClipOff, etc
+ int flags; // PAQA_FLAG_TWO_STREAMS, PAQA_FLAG_USE_BLOCKING_IO
+} TestParameters;
+
+typedef struct LoopbackContext_s
+{
+ // Generate a unique signal on each channel.
+ PaQaSineGenerator generators[MAX_NUM_GENERATORS];
+ // Record each channel individually.
+ PaQaRecording recordings[MAX_NUM_RECORDINGS];
+
+ // Reported by the stream after it's opened
+ PaTime streamInfoInputLatency;
+ PaTime streamInfoOutputLatency;
+
+ // Measured at runtime.
+ volatile int callbackCount; // incremented for each callback
+ volatile int inputBufferCount; // incremented if input buffer not NULL
+ int inputUnderflowCount;
+ int inputOverflowCount;
+
+ volatile int outputBufferCount; // incremented if output buffer not NULL
+ int outputOverflowCount;
+ int outputUnderflowCount;
+
+ // Measure whether input or output is lagging behind.
+ volatile int minInputOutputDelta;
+ volatile int maxInputOutputDelta;
+
+ int minFramesPerBuffer;
+ int maxFramesPerBuffer;
+ int primingCount;
+ TestParameters *test;
+ volatile int done;
+} LoopbackContext;
+
+typedef struct UserOptions_s
+{
+ int sampleRate;
+ int framesPerBuffer;
+ int inputLatency;
+ int outputLatency;
+ int saveBadWaves;
+ int verbose;
+ int waveFileCount;
+ const char *waveFilePath;
+ PaDeviceIndex inputDevice;
+ PaDeviceIndex outputDevice;
+} UserOptions;
+
+#define BIG_BUFFER_SIZE (sizeof(float) * 2 * 2 * 1024)
+static unsigned char g_ReadWriteBuffer[BIG_BUFFER_SIZE];
+
+#define MAX_CONVERSION_SAMPLES (2 * 32 * 1024)
+#define CONVERSION_BUFFER_SIZE (sizeof(float) * 2 * MAX_CONVERSION_SAMPLES)
+static unsigned char g_ConversionBuffer[CONVERSION_BUFFER_SIZE];
+
+/*******************************************************************/
+static int RecordAndPlaySinesCallback( const void *inputBuffer, void *outputBuffer,
+ unsigned long framesPerBuffer,
+ const PaStreamCallbackTimeInfo* timeInfo,
+ PaStreamCallbackFlags statusFlags,
+ void *userData )
+{
+ int i;
+ LoopbackContext *loopbackContext = (LoopbackContext *) userData;
+
+
+ loopbackContext->callbackCount += 1;
+ if( statusFlags & paInputUnderflow ) loopbackContext->inputUnderflowCount += 1;
+ if( statusFlags & paInputOverflow ) loopbackContext->inputOverflowCount += 1;
+ if( statusFlags & paOutputUnderflow ) loopbackContext->outputUnderflowCount += 1;
+ if( statusFlags & paOutputOverflow ) loopbackContext->outputOverflowCount += 1;
+ if( statusFlags & paPrimingOutput ) loopbackContext->primingCount += 1;
+ if( framesPerBuffer > loopbackContext->maxFramesPerBuffer )
+ {
+ loopbackContext->maxFramesPerBuffer = framesPerBuffer;
+ }
+ if( framesPerBuffer < loopbackContext->minFramesPerBuffer )
+ {
+ loopbackContext->minFramesPerBuffer = framesPerBuffer;
+ }
+
+ /* This may get called with NULL inputBuffer during initial setup.
+ * We may also use the same callback with output only streams.
+ */
+ if( inputBuffer != NULL)
+ {
+ int channelsPerFrame = loopbackContext->test->inputParameters.channelCount;
+ float *in = (float *)inputBuffer;
+ PaSampleFormat inFormat = loopbackContext->test->inputParameters.sampleFormat;
+
+ loopbackContext->inputBufferCount += 1;
+
+ if( inFormat != paFloat32 )
+ {
+ int samplesToConvert = framesPerBuffer * channelsPerFrame;
+ in = (float *) g_ConversionBuffer;
+ if( samplesToConvert > MAX_CONVERSION_SAMPLES )
+ {
+ // Hack to prevent buffer overflow.
+ // @todo Loop with small buffer instead of failing.
+ printf("Format conversion buffer too small!\n");
+ return paComplete;
+ }
+ PaQa_ConvertToFloat( inputBuffer, samplesToConvert, inFormat, (float *) g_ConversionBuffer );
+ }
+
+ // Read each channel from the buffer.
+ for( i=0; i<channelsPerFrame; i++ )
+ {
+ loopbackContext->done |= PaQa_WriteRecording( &loopbackContext->recordings[i],
+ in + i,
+ framesPerBuffer,
+ channelsPerFrame );
+ }
+ }
+
+ if( outputBuffer != NULL )
+ {
+ int channelsPerFrame = loopbackContext->test->outputParameters.channelCount;
+ float *out = (float *)outputBuffer;
+ PaSampleFormat outFormat = loopbackContext->test->outputParameters.sampleFormat;
+
+ loopbackContext->outputBufferCount += 1;
+
+ if( outFormat != paFloat32 )
+ {
+ // If we need to convert then mix to the g_ConversionBuffer and then convert into the PA outputBuffer.
+ out = (float *) g_ConversionBuffer;
+ }
+
+ PaQa_EraseBuffer( out, framesPerBuffer, channelsPerFrame );
+ for( i=0; i<channelsPerFrame; i++ )
+ {
+ PaQa_MixSine( &loopbackContext->generators[i],
+ out + i,
+ framesPerBuffer,
+ channelsPerFrame );
+ }
+
+ if( outFormat != paFloat32 )
+ {
+ int samplesToConvert = framesPerBuffer * channelsPerFrame;
+ if( samplesToConvert > MAX_CONVERSION_SAMPLES )
+ {
+ printf("Format conversion buffer too small!\n");
+ return paComplete;
+ }
+ PaQa_ConvertFromFloat( out, framesPerBuffer * channelsPerFrame, outFormat, outputBuffer );
+ }
+
+ }
+
+ // Measure whether the input or output are lagging behind.
+ // Don't measure lag at end.
+ if( !loopbackContext->done )
+ {
+ int inputOutputDelta = loopbackContext->inputBufferCount - loopbackContext->outputBufferCount;
+ if( loopbackContext->maxInputOutputDelta < inputOutputDelta )
+ {
+ loopbackContext->maxInputOutputDelta = inputOutputDelta;
+ }
+ if( loopbackContext->minInputOutputDelta > inputOutputDelta )
+ {
+ loopbackContext->minInputOutputDelta = inputOutputDelta;
+ }
+ }
+
+ return loopbackContext->done ? paComplete : paContinue;
+}
+
+static void CopyStreamInfoToLoopbackContext( LoopbackContext *loopbackContext, PaStream *inputStream, PaStream *outputStream )
+{
+ const PaStreamInfo *inputStreamInfo = Pa_GetStreamInfo( inputStream );
+ const PaStreamInfo *outputStreamInfo = Pa_GetStreamInfo( outputStream );
+
+ loopbackContext->streamInfoInputLatency = inputStreamInfo ? inputStreamInfo->inputLatency : -1;
+ loopbackContext->streamInfoOutputLatency = outputStreamInfo ? outputStreamInfo->outputLatency : -1;
+}
+
+/*******************************************************************/
+/**
+ * Open a full duplex audio stream.
+ * Generate sine waves on the output channels and record the input channels.
+ * Then close the stream.
+ * @return 0 if OK or negative error.
+ */
+int PaQa_RunLoopbackFullDuplex( LoopbackContext *loopbackContext )
+{
+ PaStream *stream = NULL;
+ PaError err = 0;
+ TestParameters *test = loopbackContext->test;
+ loopbackContext->done = 0;
+ // Use one full duplex stream.
+ err = Pa_OpenStream(
+ &stream,
+ &test->inputParameters,
+ &test->outputParameters,
+ test->sampleRate,
+ test->framesPerBuffer,
+ paClipOff, /* we won't output out of range samples so don't bother clipping them */
+ RecordAndPlaySinesCallback,
+ loopbackContext );
+ if( err != paNoError ) goto error;
+
+ CopyStreamInfoToLoopbackContext( loopbackContext, stream, stream );
+
+ err = Pa_StartStream( stream );
+ if( err != paNoError ) goto error;
+
+ // Wait for stream to finish.
+ while( loopbackContext->done == 0 )
+ {
+ Pa_Sleep(PAQA_WAIT_STREAM_MSEC);
+ }
+
+ err = Pa_StopStream( stream );
+ if( err != paNoError ) goto error;
+
+ err = Pa_CloseStream( stream );
+ if( err != paNoError ) goto error;
+
+ return 0;
+
+error:
+ return err;
+}
+
+/*******************************************************************/
+/**
+ * Open two audio streams, one for input and one for output.
+ * Generate sine waves on the output channels and record the input channels.
+ * Then close the stream.
+ * @return 0 if OK or paTimedOut.
+ */
+
+int PaQa_WaitForStream( LoopbackContext *loopbackContext )
+{
+ int timeoutMSec = 1000 * PAQA_TEST_DURATION * 2;
+
+ // Wait for stream to finish or timeout.
+ while( (loopbackContext->done == 0) && (timeoutMSec > 0) )
+ {
+ Pa_Sleep(PAQA_WAIT_STREAM_MSEC);
+ timeoutMSec -= PAQA_WAIT_STREAM_MSEC;
+ }
+
+ if( loopbackContext->done == 0 )
+ {
+ printf("ERROR - stream completion timed out!");
+ return paTimedOut;
+ }
+ return 0;
+}
+
+/*******************************************************************/
+/**
+ * Open two audio streams, one for input and one for output.
+ * Generate sine waves on the output channels and record the input channels.
+ * Then close the stream.
+ * @return 0 if OK or negative error.
+ */
+int PaQa_RunLoopbackHalfDuplex( LoopbackContext *loopbackContext )
+{
+ PaStream *inStream = NULL;
+ PaStream *outStream = NULL;
+ PaError err = 0;
+ int timedOut = 0;
+ TestParameters *test = loopbackContext->test;
+ loopbackContext->done = 0;
+
+ // Use two half duplex streams.
+ err = Pa_OpenStream(
+ &inStream,
+ &test->inputParameters,
+ NULL,
+ test->sampleRate,
+ test->framesPerBuffer,
+ test->streamFlags,
+ RecordAndPlaySinesCallback,
+ loopbackContext );
+ if( err != paNoError ) goto error;
+ err = Pa_OpenStream(
+ &outStream,
+ NULL,
+ &test->outputParameters,
+ test->sampleRate,
+ test->framesPerBuffer,
+ test->streamFlags,
+ RecordAndPlaySinesCallback,
+ loopbackContext );
+ if( err != paNoError ) goto error;
+
+ CopyStreamInfoToLoopbackContext( loopbackContext, inStream, outStream );
+
+ err = Pa_StartStream( inStream );
+ if( err != paNoError ) goto error;
+
+ // Start output later so we catch the beginning of the waveform.
+ err = Pa_StartStream( outStream );
+ if( err != paNoError ) goto error;
+
+ timedOut = PaQa_WaitForStream( loopbackContext );
+
+ err = Pa_StopStream( inStream );
+ if( err != paNoError ) goto error;
+
+ err = Pa_StopStream( outStream );
+ if( err != paNoError ) goto error;
+
+ err = Pa_CloseStream( inStream );
+ if( err != paNoError ) goto error;
+
+ err = Pa_CloseStream( outStream );
+ if( err != paNoError ) goto error;
+
+ return timedOut;
+
+error:
+ return err;
+}
+
+
+/*******************************************************************/
+/**
+ * Open one audio streams, just for input.
+ * Record background level.
+ * Then close the stream.
+ * @return 0 if OK or negative error.
+ */
+int PaQa_RunInputOnly( LoopbackContext *loopbackContext )
+{
+ PaStream *inStream = NULL;
+ PaError err = 0;
+ int timedOut = 0;
+ TestParameters *test = loopbackContext->test;
+ loopbackContext->done = 0;
+
+ // Just open an input stream.
+ err = Pa_OpenStream(
+ &inStream,
+ &test->inputParameters,
+ NULL,
+ test->sampleRate,
+ test->framesPerBuffer,
+ paClipOff, /* We won't output out of range samples so don't bother clipping them. */
+ RecordAndPlaySinesCallback,
+ loopbackContext );
+ if( err != paNoError ) goto error;
+
+ err = Pa_StartStream( inStream );
+ if( err != paNoError ) goto error;
+
+ timedOut = PaQa_WaitForStream( loopbackContext );
+
+ err = Pa_StopStream( inStream );
+ if( err != paNoError ) goto error;
+
+ err = Pa_CloseStream( inStream );
+ if( err != paNoError ) goto error;
+
+ return timedOut;
+
+error:
+ return err;
+}
+
+/*******************************************************************/
+static int RecordAndPlayBlockingIO( PaStream *inStream,
+ PaStream *outStream,
+ LoopbackContext *loopbackContext
+ )
+{
+ int i;
+ float *in = (float *)g_ReadWriteBuffer;
+ float *out = (float *)g_ReadWriteBuffer;
+ PaError err;
+ int done = 0;
+ long available;
+ const long maxPerBuffer = 64;
+ TestParameters *test = loopbackContext->test;
+ long framesPerBuffer = test->framesPerBuffer;
+ if( framesPerBuffer <= 0 )
+ {
+ framesPerBuffer = maxPerBuffer; // bigger values might run past end of recording
+ }
+
+ // Read in audio.
+ err = Pa_ReadStream( inStream, in, framesPerBuffer );
+ // Ignore an overflow on the first read.
+ //if( !((loopbackContext->callbackCount == 0) && (err == paInputOverflowed)) )
+ if( err != paInputOverflowed )
+ {
+ QA_ASSERT_EQUALS( "Pa_ReadStream failed", paNoError, err );
+ }
+ else
+ {
+ loopbackContext->inputOverflowCount += 1;
+ }
+
+
+ // Save in a recording.
+ for( i=0; i<loopbackContext->test->inputParameters.channelCount; i++ )
+ {
+ done |= PaQa_WriteRecording( &loopbackContext->recordings[i],
+ in + i,
+ framesPerBuffer,
+ loopbackContext->test->inputParameters.channelCount );
+ }
+
+ // Synthesize audio.
+ available = Pa_GetStreamWriteAvailable( outStream );
+ if( available > (2*framesPerBuffer) ) available = (2*framesPerBuffer);
+ PaQa_EraseBuffer( out, available, loopbackContext->test->outputParameters.channelCount );
+ for( i=0; i<loopbackContext->test->outputParameters.channelCount; i++ )
+ {
+ PaQa_MixSine( &loopbackContext->generators[i],
+ out + i,
+ available,
+ loopbackContext->test->outputParameters.channelCount );
+ }
+
+ // Write out audio.
+ err = Pa_WriteStream( outStream, out, available );
+ // Ignore an underflow on the first write.
+ //if( !((loopbackContext->callbackCount == 0) && (err == paOutputUnderflowed)) )
+ if( err != paOutputUnderflowed )
+ {
+ QA_ASSERT_EQUALS( "Pa_WriteStream failed", paNoError, err );
+ }
+ else
+ {
+ loopbackContext->outputUnderflowCount += 1;
+ }
+
+
+ loopbackContext->callbackCount += 1;
+
+ return done;
+error:
+ return err;
+}
+
+
+/*******************************************************************/
+/**
+ * Open two audio streams with non-blocking IO.
+ * Generate sine waves on the output channels and record the input channels.
+ * Then close the stream.
+ * @return 0 if OK or negative error.
+ */
+int PaQa_RunLoopbackHalfDuplexBlockingIO( LoopbackContext *loopbackContext )
+{
+ PaStream *inStream = NULL;
+ PaStream *outStream = NULL;
+ PaError err = 0;
+ TestParameters *test = loopbackContext->test;
+
+ // Use two half duplex streams.
+ err = Pa_OpenStream(
+ &inStream,
+ &test->inputParameters,
+ NULL,
+ test->sampleRate,
+ test->framesPerBuffer,
+ paClipOff, /* we won't output out of range samples so don't bother clipping them */
+ NULL, // causes non-blocking IO
+ NULL );
+ if( err != paNoError ) goto error1;
+ err = Pa_OpenStream(
+ &outStream,
+ NULL,
+ &test->outputParameters,
+ test->sampleRate,
+ test->framesPerBuffer,
+ paClipOff, /* we won't output out of range samples so don't bother clipping them */
+ NULL, // causes non-blocking IO
+ NULL );
+ if( err != paNoError ) goto error2;
+
+ CopyStreamInfoToLoopbackContext( loopbackContext, inStream, outStream );
+
+ err = Pa_StartStream( outStream );
+ if( err != paNoError ) goto error3;
+
+ err = Pa_StartStream( inStream );
+ if( err != paNoError ) goto error3;
+
+ while( err == 0 )
+ {
+ err = RecordAndPlayBlockingIO( inStream, outStream, loopbackContext );
+ if( err < 0 ) goto error3;
+ }
+
+ err = Pa_StopStream( inStream );
+ if( err != paNoError ) goto error3;
+
+ err = Pa_StopStream( outStream );
+ if( err != paNoError ) goto error3;
+
+ err = Pa_CloseStream( outStream );
+ if( err != paNoError ) goto error2;
+
+ err = Pa_CloseStream( inStream );
+ if( err != paNoError ) goto error1;
+
+
+ return 0;
+
+error3:
+ Pa_CloseStream( outStream );
+error2:
+ Pa_CloseStream( inStream );
+error1:
+ return err;
+}
+
+
+/*******************************************************************/
+/**
+ * Open one audio stream with non-blocking IO.
+ * Generate sine waves on the output channels and record the input channels.
+ * Then close the stream.
+ * @return 0 if OK or negative error.
+ */
+int PaQa_RunLoopbackFullDuplexBlockingIO( LoopbackContext *loopbackContext )
+{
+ PaStream *stream = NULL;
+ PaError err = 0;
+ TestParameters *test = loopbackContext->test;
+
+ // Use one full duplex stream.
+ err = Pa_OpenStream(
+ &stream,
+ &test->inputParameters,
+ &test->outputParameters,
+ test->sampleRate,
+ test->framesPerBuffer,
+ paClipOff, /* we won't output out of range samples so don't bother clipping them */
+ NULL, // causes non-blocking IO
+ NULL );
+ if( err != paNoError ) goto error1;
+
+ CopyStreamInfoToLoopbackContext( loopbackContext, stream, stream );
+
+ err = Pa_StartStream( stream );
+ if( err != paNoError ) goto error2;
+
+ while( err == 0 )
+ {
+ err = RecordAndPlayBlockingIO( stream, stream, loopbackContext );
+ if( err < 0 ) goto error2;
+ }
+
+ err = Pa_StopStream( stream );
+ if( err != paNoError ) goto error2;
+
+
+ err = Pa_CloseStream( stream );
+ if( err != paNoError ) goto error1;
+
+
+ return 0;
+
+error2:
+ Pa_CloseStream( stream );
+error1:
+ return err;
+}
+
+
+/*******************************************************************/
+/**
+ * Run some kind of loopback test.
+ * @return 0 if OK or negative error.
+ */
+int PaQa_RunLoopback( LoopbackContext *loopbackContext )
+{
+ PaError err = 0;
+ TestParameters *test = loopbackContext->test;
+
+
+ if( test->flags & PAQA_FLAG_TWO_STREAMS )
+ {
+ if( test->flags & PAQA_FLAG_USE_BLOCKING_IO )
+ {
+ err = PaQa_RunLoopbackHalfDuplexBlockingIO( loopbackContext );
+ }
+ else
+ {
+ err = PaQa_RunLoopbackHalfDuplex( loopbackContext );
+ }
+ }
+ else
+ {
+ if( test->flags & PAQA_FLAG_USE_BLOCKING_IO )
+ {
+ err = PaQa_RunLoopbackFullDuplexBlockingIO( loopbackContext );
+ }
+ else
+ {
+ err = PaQa_RunLoopbackFullDuplex( loopbackContext );
+ }
+ }
+
+ if( err != paNoError )
+ {
+ printf("PortAudio error = %s\n", Pa_GetErrorText( err ) );
+ }
+ return err;
+}
+
+/*******************************************************************/
+static int PaQa_SaveTestResultToWaveFile( UserOptions *userOptions, PaQaRecording *recording )
+{
+ if( userOptions->saveBadWaves )
+ {
+ char filename[256];
+#ifdef WIN32
+ _snprintf( filename, sizeof(filename), "%s\\paloopback_%d.wav", userOptions->waveFilePath, userOptions->waveFileCount++ );
+#else
+ snprintf( filename, sizeof(filename), "%s/paloopback_%d.wav", userOptions->waveFilePath, userOptions->waveFileCount++ );
+#endif
+ printf( "\"%s\", ", filename );
+ return PaQa_SaveRecordingToWaveFile( recording, filename );
+ }
+ return 0;
+}
+
+/*******************************************************************/
+static int PaQa_SetupLoopbackContext( LoopbackContext *loopbackContextPtr, TestParameters *testParams )
+{
+ int i;
+ // Setup loopback context.
+ memset( loopbackContextPtr, 0, sizeof(LoopbackContext) );
+ loopbackContextPtr->test = testParams;
+ for( i=0; i<testParams->samplesPerFrame; i++ )
+ {
+ int err = PaQa_InitializeRecording( &loopbackContextPtr->recordings[i], testParams->maxFrames, testParams->sampleRate );
+ QA_ASSERT_EQUALS( "PaQa_InitializeRecording failed", paNoError, err );
+ }
+ for( i=0; i<testParams->samplesPerFrame; i++ )
+ {
+ PaQa_SetupSineGenerator( &loopbackContextPtr->generators[i], PaQa_GetNthFrequency( testParams->baseFrequency, i ),
+ testParams->amplitude, testParams->sampleRate );
+ }
+ loopbackContextPtr->minFramesPerBuffer = 0x0FFFFFFF;
+ return 0;
+error:
+ return -1;
+}
+
+/*******************************************************************/
+static void PaQa_TeardownLoopbackContext( LoopbackContext *loopbackContextPtr )
+{
+ int i;
+ if( loopbackContextPtr->test != NULL )
+ {
+ for( i=0; i<loopbackContextPtr->test->samplesPerFrame; i++ )
+ {
+ PaQa_TerminateRecording( &loopbackContextPtr->recordings[i] );
+ }
+ }
+}
+
+/*******************************************************************/
+static void PaQa_PrintShortErrorReport( PaQaAnalysisResult *analysisResultPtr, int channel )
+{
+ printf("channel %d ", channel);
+ if( analysisResultPtr->popPosition > 0 )
+ {
+ printf("POP %0.3f at %d, ", (double)analysisResultPtr->popAmplitude, (int)analysisResultPtr->popPosition );
+ }
+ else
+ {
+ if( analysisResultPtr->addedFramesPosition > 0 )
+ {
+ printf("ADD %d at %d ", (int)analysisResultPtr->numAddedFrames, (int)analysisResultPtr->addedFramesPosition );
+ }
+
+ if( analysisResultPtr->droppedFramesPosition > 0 )
+ {
+ printf("DROP %d at %d ", (int)analysisResultPtr->numDroppedFrames, (int)analysisResultPtr->droppedFramesPosition );
+ }
+ }
+}
+
+/*******************************************************************/
+static void PaQa_PrintFullErrorReport( PaQaAnalysisResult *analysisResultPtr, int channel )
+{
+ printf("\n=== Loopback Analysis ===================\n");
+ printf(" channel: %d\n", channel );
+ printf(" latency: %10.3f\n", analysisResultPtr->latency );
+ printf(" amplitudeRatio: %10.3f\n", (double)analysisResultPtr->amplitudeRatio );
+ printf(" popPosition: %10.3f\n", (double)analysisResultPtr->popPosition );
+ printf(" popAmplitude: %10.3f\n", (double)analysisResultPtr->popAmplitude );
+ printf(" num added frames: %10.3f\n", analysisResultPtr->numAddedFrames );
+ printf(" added frames at: %10.3f\n", analysisResultPtr->addedFramesPosition );
+ printf(" num dropped frames: %10.3f\n", analysisResultPtr->numDroppedFrames );
+ printf(" dropped frames at: %10.3f\n", analysisResultPtr->droppedFramesPosition );
+}
+
+/*******************************************************************/
+/**
+ * Test loopback connection using the given parameters.
+ * @return number of channels with glitches, or negative error.
+ */
+static int PaQa_SingleLoopBackTest( UserOptions *userOptions, TestParameters *testParams )
+{
+ int i;
+ LoopbackContext loopbackContext;
+ PaError err = paNoError;
+ PaQaTestTone testTone;
+ PaQaAnalysisResult analysisResult;
+ int numBadChannels = 0;
+
+ printf("| %5d | %6d | ", ((int)(testParams->sampleRate+0.5)), testParams->framesPerBuffer );
+ fflush(stdout);
+
+ testTone.samplesPerFrame = testParams->samplesPerFrame;
+ testTone.sampleRate = testParams->sampleRate;
+ testTone.amplitude = testParams->amplitude;
+ testTone.startDelay = 0;
+
+ err = PaQa_SetupLoopbackContext( &loopbackContext, testParams );
+ if( err ) return err;
+
+ err = PaQa_RunLoopback( &loopbackContext );
+ QA_ASSERT_TRUE("loopback did not run", (loopbackContext.callbackCount > 1) );
+
+ printf( "%7.2f %7.2f %7.2f | ",
+ loopbackContext.streamInfoInputLatency * 1000.0,
+ loopbackContext.streamInfoOutputLatency * 1000.0,
+ (loopbackContext.streamInfoInputLatency + loopbackContext.streamInfoOutputLatency) * 1000.0
+ );
+
+ printf( "%4d/%4d/%4d, %4d/%4d/%4d | ",
+ loopbackContext.inputOverflowCount,
+ loopbackContext.inputUnderflowCount,
+ loopbackContext.inputBufferCount,
+ loopbackContext.outputOverflowCount,
+ loopbackContext.outputUnderflowCount,
+ loopbackContext.outputBufferCount
+ );
+
+ // Analyse recording to detect glitches.
+ for( i=0; i<testParams->samplesPerFrame; i++ )
+ {
+ double freq = PaQa_GetNthFrequency( testParams->baseFrequency, i );
+ testTone.frequency = freq;
+
+ PaQa_AnalyseRecording( &loopbackContext.recordings[i], &testTone, &analysisResult );
+
+ if( i==0 )
+ {
+ double latencyMSec;
+
+ printf( "%4d-%4d | ",
+ loopbackContext.minFramesPerBuffer,
+ loopbackContext.maxFramesPerBuffer
+ );
+
+ latencyMSec = 1000.0 * analysisResult.latency / testParams->sampleRate;
+ printf("%7.2f | ", latencyMSec );
+
+ }
+
+ if( analysisResult.valid )
+ {
+ int badChannel = ( (analysisResult.popPosition > 0)
+ || (analysisResult.addedFramesPosition > 0)
+ || (analysisResult.droppedFramesPosition > 0) );
+
+ if( badChannel )
+ {
+ if( userOptions->verbose )
+ {
+ PaQa_PrintFullErrorReport( &analysisResult, i );
+ }
+ else
+ {
+ PaQa_PrintShortErrorReport( &analysisResult, i );
+ }
+ PaQa_SaveTestResultToWaveFile( userOptions, &loopbackContext.recordings[i] );
+ }
+ numBadChannels += badChannel;
+ }
+ else
+ {
+ printf( "[%d] No or low signal, ampRatio = %f", i, analysisResult.amplitudeRatio );
+ numBadChannels += 1;
+ }
+
+ }
+ if( numBadChannels == 0 )
+ {
+ printf( "OK" );
+ }
+
+ // Print the # errors so far to make it easier to see where the error occurred.
+ printf( " - #errs = %d\n", g_testsFailed );
+
+ PaQa_TeardownLoopbackContext( &loopbackContext );
+ if( numBadChannels > 0 )
+ {
+ g_testsFailed += 1;
+ }
+ return numBadChannels;
+
+error:
+ PaQa_TeardownLoopbackContext( &loopbackContext );
+ printf( "\n" );
+ g_testsFailed += 1;
+ return err;
+}
+
+/*******************************************************************/
+static void PaQa_SetDefaultTestParameters( TestParameters *testParamsPtr, PaDeviceIndex inputDevice, PaDeviceIndex outputDevice )
+{
+ memset( testParamsPtr, 0, sizeof(TestParameters) );
+
+ testParamsPtr->samplesPerFrame = 2;
+ testParamsPtr->amplitude = 0.5;
+ testParamsPtr->sampleRate = 44100;
+ testParamsPtr->maxFrames = (int) (PAQA_TEST_DURATION * testParamsPtr->sampleRate);
+ testParamsPtr->framesPerBuffer = DEFAULT_FRAMES_PER_BUFFER;
+ testParamsPtr->baseFrequency = 200.0;
+ testParamsPtr->flags = PAQA_FLAG_TWO_STREAMS;
+ testParamsPtr->streamFlags = paClipOff; /* we won't output out of range samples so don't bother clipping them */
+
+ testParamsPtr->inputParameters.device = inputDevice;
+ testParamsPtr->inputParameters.sampleFormat = paFloat32;
+ testParamsPtr->inputParameters.channelCount = testParamsPtr->samplesPerFrame;
+ testParamsPtr->inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputDevice )->defaultLowInputLatency;
+ //testParamsPtr->inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputDevice )->defaultHighInputLatency;
+
+ testParamsPtr->outputParameters.device = outputDevice;
+ testParamsPtr->outputParameters.sampleFormat = paFloat32;
+ testParamsPtr->outputParameters.channelCount = testParamsPtr->samplesPerFrame;
+ testParamsPtr->outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputDevice )->defaultLowOutputLatency;
+ //testParamsPtr->outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputDevice )->defaultHighOutputLatency;
+}
+
+/*******************************************************************/
+static void PaQa_OverrideTestParameters( TestParameters *testParamsPtr, UserOptions *userOptions )
+{
+ // Check to see if a specific value was requested.
+ if( userOptions->sampleRate >= 0 )
+ {
+ testParamsPtr->sampleRate = userOptions->sampleRate;
+ testParamsPtr->maxFrames = (int) (PAQA_TEST_DURATION * testParamsPtr->sampleRate);
+ }
+ if( userOptions->framesPerBuffer >= 0 )
+ {
+ testParamsPtr->framesPerBuffer = userOptions->framesPerBuffer;
+ }
+ if( userOptions->inputLatency >= 0 )
+ {
+ testParamsPtr->inputParameters.suggestedLatency = userOptions->inputLatency * 0.001;
+ }
+ if( userOptions->outputLatency >= 0 )
+ {
+ testParamsPtr->outputParameters.suggestedLatency = userOptions->outputLatency * 0.001;
+ }
+ printf( " Running with suggested latency (msec): input = %5.2f, out = %5.2f\n",
+ (testParamsPtr->inputParameters.suggestedLatency * 1000.0),
+ (testParamsPtr->outputParameters.suggestedLatency * 1000.0) );
+}
+
+/*******************************************************************/
+/**
+ * Run a series of tests on this loopback connection.
+ * @return number of bad channel results
+ */
+static int PaQa_AnalyzeLoopbackConnection( UserOptions *userOptions, PaDeviceIndex inputDevice, PaDeviceIndex outputDevice )
+{
+ int iFlags;
+ int iRate;
+ int iSize;
+ int iFormat;
+ int savedValue;
+ TestParameters testParams;
+ const PaDeviceInfo *inputDeviceInfo = Pa_GetDeviceInfo( inputDevice );
+ const PaDeviceInfo *outputDeviceInfo = Pa_GetDeviceInfo( outputDevice );
+ int totalBadChannels = 0;
+
+ // test half duplex first because it is more likely to work.
+ int flagSettings[] = { PAQA_FLAG_TWO_STREAMS, 0 };
+ int numFlagSettings = (sizeof(flagSettings)/sizeof(int));
+
+ double sampleRates[] = { 8000.0, 11025.0, 16000.0, 22050.0, 32000.0, 44100.0, 48000.0, 96000.0 };
+ int numRates = (sizeof(sampleRates)/sizeof(double));
+
+ // framesPerBuffer==0 means PA decides on the buffer size.
+ int framesPerBuffers[] = { 0, 16, 32, 40, 64, 100, 128, 256, 512, 1024 };
+ int numBufferSizes = (sizeof(framesPerBuffers)/sizeof(int));
+
+ PaSampleFormat sampleFormats[] = { paFloat32, paUInt8, paInt8, paInt16, paInt32 };
+ const char *sampleFormatNames[] = { "paFloat32", "paUInt8", "paInt8", "paInt16", "paInt32" };
+ int numSampleFormats = (sizeof(sampleFormats)/sizeof(PaSampleFormat));
+
+ printf( "=============== Analysing Loopback %d to %d =====================\n", outputDevice, inputDevice );
+ printf( " Devices: %s => %s\n", outputDeviceInfo->name, inputDeviceInfo->name);
+
+ PaQa_SetDefaultTestParameters( &testParams, inputDevice, outputDevice );
+
+ PaQa_OverrideTestParameters( &testParams, userOptions );
+
+ // Loop though combinations of audio parameters.
+ for( iFlags=0; iFlags<numFlagSettings; iFlags++ )
+ {
+ int numRuns = 0;
+
+ testParams.flags = flagSettings[iFlags];
+ printf( "\n************ Mode = %s ************\n",
+ (( testParams.flags & 1 ) ? s_FlagOnNames[0] : s_FlagOffNames[0]) );
+
+ printf("|- requested -|- stream info latency -|- measured ------------------------------\n");
+ printf("|-sRate-|-fr/buf-|- in - out - total -|- over/under/calls for in, out -|- frm/buf -|-latency-|- channel results -\n");
+
+ // Loop though various sample rates.
+ if( userOptions->sampleRate < 0 )
+ {
+ savedValue = testParams.sampleRate;
+ for( iRate=0; iRate<numRates; iRate++ )
+ {
+ int numBadChannels;
+
+ // SAMPLE RATE
+ testParams.sampleRate = sampleRates[iRate];
+ testParams.maxFrames = (int) (PAQA_TEST_DURATION * testParams.sampleRate);
+
+ numBadChannels = PaQa_SingleLoopBackTest( userOptions, &testParams );
+ totalBadChannels += numBadChannels;
+ }
+ testParams.sampleRate = savedValue;
+ testParams.maxFrames = (int) (PAQA_TEST_DURATION * testParams.sampleRate);
+ printf( "\n" );
+ numRuns += 1;
+ }
+
+ // Loop through various buffer sizes.
+ if( userOptions->framesPerBuffer < 0 )
+ {
+ savedValue = testParams.framesPerBuffer;
+ for( iSize=0; iSize<numBufferSizes; iSize++ )
+ {
+ int numBadChannels;
+
+ // BUFFER SIZE
+ testParams.framesPerBuffer = framesPerBuffers[iSize];
+
+ numBadChannels = PaQa_SingleLoopBackTest( userOptions, &testParams );
+ totalBadChannels += numBadChannels;
+ }
+ testParams.framesPerBuffer = savedValue;
+ printf( "\n" );
+ numRuns += 1;
+ }
+ // Run one with single parameters in case we did not do a series.
+ if( numRuns == 0 )
+ {
+ int numBadChannels = PaQa_SingleLoopBackTest( userOptions, &testParams );
+ totalBadChannels += numBadChannels;
+ }
+ }
+
+ printf("\nTest Sample Formats using Half Duplex IO -----\n" );
+
+ PaQa_SetDefaultTestParameters( &testParams, inputDevice, outputDevice );
+ testParams.flags = PAQA_FLAG_TWO_STREAMS;
+ for( iFlags= 0; iFlags<4; iFlags++ )
+ {
+ // Cycle through combinations of flags.
+ testParams.streamFlags = 0;
+ if( iFlags & 1 ) testParams.streamFlags |= paClipOff;
+ if( iFlags & 2 ) testParams.streamFlags |= paDitherOff;
+
+ for( iFormat=0; iFormat<numSampleFormats; iFormat++ )
+ {
+ int numBadChannels;
+ PaSampleFormat format = sampleFormats[ iFormat ];
+ testParams.inputParameters.sampleFormat = format;
+ testParams.outputParameters.sampleFormat = format;
+ printf("Sample format = %d = %s, PaStreamFlags = 0x%02X\n", (int) format, sampleFormatNames[iFormat], (unsigned int) testParams.streamFlags );
+ numBadChannels = PaQa_SingleLoopBackTest( userOptions, &testParams );
+ totalBadChannels += numBadChannels;
+ }
+ }
+ printf( "\n" );
+ printf( "****************************************\n");
+
+ return totalBadChannels;
+}
+
+/*******************************************************************/
+int PaQa_CheckForClippedLoopback( LoopbackContext *loopbackContextPtr )
+{
+ int clipped = 0;
+ TestParameters *testParamsPtr = loopbackContextPtr->test;
+
+ // Start in the middle assuming past latency.
+ int startFrame = testParamsPtr->maxFrames/2;
+ int numFrames = testParamsPtr->maxFrames/2;
+
+ // Check to see if the signal is clipped.
+ double amplitudeLeft = PaQa_MeasureSineAmplitudeBySlope( &loopbackContextPtr->recordings[0],
+ testParamsPtr->baseFrequency, testParamsPtr->sampleRate,
+ startFrame, numFrames );
+ double gainLeft = amplitudeLeft / testParamsPtr->amplitude;
+ double amplitudeRight = PaQa_MeasureSineAmplitudeBySlope( &loopbackContextPtr->recordings[1],
+ testParamsPtr->baseFrequency, testParamsPtr->sampleRate,
+ startFrame, numFrames );
+ double gainRight = amplitudeLeft / testParamsPtr->amplitude;
+ printf(" Loop gain: left = %f, right = %f\n", gainLeft, gainRight );
+
+ if( (amplitudeLeft > 1.0 ) || (amplitudeRight > 1.0) )
+ {
+ printf("ERROR - loop gain is too high. Should be around than 1.0. Please lower output level and/or input gain.\n" );
+ clipped = 1;
+ }
+ return clipped;
+}
+
+/*******************************************************************/
+int PaQa_MeasureBackgroundNoise( LoopbackContext *loopbackContextPtr, double *rmsPtr )
+{
+ int result = 0;
+ *rmsPtr = 0.0;
+ // Rewind so we can record some input.
+ loopbackContextPtr->recordings[0].numFrames = 0;
+ loopbackContextPtr->recordings[1].numFrames = 0;
+ result = PaQa_RunInputOnly( loopbackContextPtr );
+ if( result == 0 )
+ {
+ double leftRMS = PaQa_MeasureRootMeanSquare( loopbackContextPtr->recordings[0].buffer,
+ loopbackContextPtr->recordings[0].numFrames );
+ double rightRMS = PaQa_MeasureRootMeanSquare( loopbackContextPtr->recordings[1].buffer,
+ loopbackContextPtr->recordings[1].numFrames );
+ *rmsPtr = (leftRMS + rightRMS) / 2.0;
+ }
+ return result;
+}
+
+/*******************************************************************/
+/**
+ * Output a sine wave then try to detect it on input.
+ *
+ * @return 1 if loopback connected, 0 if not, or negative error.
+ */
+int PaQa_CheckForLoopBack( UserOptions *userOptions, PaDeviceIndex inputDevice, PaDeviceIndex outputDevice )
+{
+ TestParameters testParams;
+ LoopbackContext loopbackContext;
+ const PaDeviceInfo *inputDeviceInfo;
+ const PaDeviceInfo *outputDeviceInfo;
+ PaError err = paNoError;
+ double minAmplitude;
+ int loopbackIsConnected;
+ int startFrame, numFrames;
+ double magLeft, magRight;
+
+ inputDeviceInfo = Pa_GetDeviceInfo( inputDevice );
+ if( inputDeviceInfo == NULL )
+ {
+ printf("ERROR - Pa_GetDeviceInfo for input returned NULL.\n");
+ return paInvalidDevice;
+ }
+ if( inputDeviceInfo->maxInputChannels < 2 )
+ {
+ return 0;
+ }
+
+ outputDeviceInfo = Pa_GetDeviceInfo( outputDevice );
+ if( outputDeviceInfo == NULL )
+ {
+ printf("ERROR - Pa_GetDeviceInfo for output returned NULL.\n");
+ return paInvalidDevice;
+ }
+ if( outputDeviceInfo->maxOutputChannels < 2 )
+ {
+ return 0;
+ }
+
+ printf( "Look for loopback cable between \"%s\" => \"%s\"\n", outputDeviceInfo->name, inputDeviceInfo->name);
+
+ printf( " Default suggested input latency (msec): low = %5.2f, high = %5.2f\n",
+ (inputDeviceInfo->defaultLowInputLatency * 1000.0),
+ (inputDeviceInfo->defaultHighInputLatency * 1000.0) );
+ printf( " Default suggested output latency (msec): low = %5.2f, high = %5.2f\n",
+ (outputDeviceInfo->defaultLowOutputLatency * 1000.0),
+ (outputDeviceInfo->defaultHighOutputLatency * 1000.0) );
+
+ PaQa_SetDefaultTestParameters( &testParams, inputDevice, outputDevice );
+
+ PaQa_OverrideTestParameters( &testParams, userOptions );
+
+ testParams.maxFrames = (int) (LOOPBACK_DETECTION_DURATION_SECONDS * testParams.sampleRate);
+ minAmplitude = testParams.amplitude / 4.0;
+
+ // Check to see if the selected formats are supported.
+ if( Pa_IsFormatSupported( &testParams.inputParameters, NULL, testParams.sampleRate ) != paFormatIsSupported )
+ {
+ printf( "Input not supported for this format!\n" );
+ return 0;
+ }
+ if( Pa_IsFormatSupported( NULL, &testParams.outputParameters, testParams.sampleRate ) != paFormatIsSupported )
+ {
+ printf( "Output not supported for this format!\n" );
+ return 0;
+ }
+
+ PaQa_SetupLoopbackContext( &loopbackContext, &testParams );
+
+ if( inputDevice == outputDevice )
+ {
+ // Use full duplex if checking for loopback on one device.
+ testParams.flags &= ~PAQA_FLAG_TWO_STREAMS;
+ }
+ else
+ {
+ // Use half duplex if checking for loopback on two different device.
+ testParams.flags = PAQA_FLAG_TWO_STREAMS;
+ }
+ err = PaQa_RunLoopback( &loopbackContext );
+ QA_ASSERT_TRUE("loopback detection callback did not run", (loopbackContext.callbackCount > 1) );
+
+ // Analyse recording to see if we captured the output.
+ // Start in the middle assuming past latency.
+ startFrame = testParams.maxFrames/2;
+ numFrames = testParams.maxFrames/2;
+ magLeft = PaQa_CorrelateSine( &loopbackContext.recordings[0],
+ loopbackContext.generators[0].frequency,
+ testParams.sampleRate,
+ startFrame, numFrames, NULL );
+ magRight = PaQa_CorrelateSine( &loopbackContext.recordings[1],
+ loopbackContext.generators[1].frequency,
+ testParams.sampleRate,
+ startFrame, numFrames, NULL );
+ printf(" Amplitudes: left = %f, right = %f\n", magLeft, magRight );
+
+ // Check for backwards cable.
+ loopbackIsConnected = ((magLeft > minAmplitude) && (magRight > minAmplitude));
+
+ if( !loopbackIsConnected )
+ {
+ double magLeftReverse = PaQa_CorrelateSine( &loopbackContext.recordings[0],
+ loopbackContext.generators[1].frequency,
+ testParams.sampleRate,
+ startFrame, numFrames, NULL );
+
+ double magRightReverse = PaQa_CorrelateSine( &loopbackContext.recordings[1],
+ loopbackContext.generators[0].frequency,
+ testParams.sampleRate,
+ startFrame, numFrames, NULL );
+
+ if ((magLeftReverse > minAmplitude) && (magRightReverse>minAmplitude))
+ {
+ printf("ERROR - You seem to have the left and right channels swapped on the loopback cable!\n");
+ }
+ }
+ else
+ {
+ double rms = 0.0;
+ if( PaQa_CheckForClippedLoopback( &loopbackContext ) )
+ {
+ // Clipped so don't use this loopback.
+ loopbackIsConnected = 0;
+ }
+
+ err = PaQa_MeasureBackgroundNoise( &loopbackContext, &rms );
+ printf(" Background noise = %f\n", rms );
+ if( err )
+ {
+ printf("ERROR - Could not measure background noise on this input!\n");
+ loopbackIsConnected = 0;
+ }
+ else if( rms > MAX_BACKGROUND_NOISE_RMS )
+ {
+ printf("ERROR - There is too much background noise on this input!\n");
+ loopbackIsConnected = 0;
+ }
+ }
+
+ PaQa_TeardownLoopbackContext( &loopbackContext );
+ return loopbackIsConnected;
+
+error:
+ PaQa_TeardownLoopbackContext( &loopbackContext );
+ return err;
+}
+
+/*******************************************************************/
+/**
+ * If there is a loopback connection then run the analysis.
+ */
+static int CheckLoopbackAndScan( UserOptions *userOptions,
+ PaDeviceIndex iIn, PaDeviceIndex iOut )
+{
+ int loopbackConnected = PaQa_CheckForLoopBack( userOptions, iIn, iOut );
+ if( loopbackConnected > 0 )
+ {
+ PaQa_AnalyzeLoopbackConnection( userOptions, iIn, iOut );
+ return 1;
+ }
+ return 0;
+}
+
+/*******************************************************************/
+/**
+ * Scan every combination of output to input device.
+ * If a loopback is found the analyse the combination.
+ * The scan can be overridden using the -i and -o command line options.
+ */
+static int ScanForLoopback(UserOptions *userOptions)
+{
+ PaDeviceIndex iIn,iOut;
+ int numLoopbacks = 0;
+ int numDevices;
+ numDevices = Pa_GetDeviceCount();
+
+ // If both devices are specified then just use that combination.
+ if ((userOptions->inputDevice >= 0) && (userOptions->outputDevice >= 0))
+ {
+ numLoopbacks += CheckLoopbackAndScan( userOptions, userOptions->inputDevice, userOptions->outputDevice );
+ }
+ else if (userOptions->inputDevice >= 0)
+ {
+ // Just scan for output.
+ for( iOut=0; iOut<numDevices; iOut++ )
+ {
+ numLoopbacks += CheckLoopbackAndScan( userOptions, userOptions->inputDevice, iOut );
+ }
+ }
+ else if (userOptions->outputDevice >= 0)
+ {
+ // Just scan for input.
+ for( iIn=0; iIn<numDevices; iIn++ )
+ {
+ numLoopbacks += CheckLoopbackAndScan( userOptions, iIn, userOptions->outputDevice );
+ }
+ }
+ else
+ {
+ // Scan both.
+ for( iOut=0; iOut<numDevices; iOut++ )
+ {
+ for( iIn=0; iIn<numDevices; iIn++ )
+ {
+ numLoopbacks += CheckLoopbackAndScan( userOptions, iIn, iOut );
+ }
+ }
+ }
+ QA_ASSERT_TRUE( "No good loopback cable found.", (numLoopbacks > 0) );
+ return numLoopbacks;
+
+error:
+ return -1;
+}
+
+/*==========================================================================================*/
+int TestSampleFormatConversion( void )
+{
+ int i;
+ const float floatInput[] = { 1.0, 0.5, -0.5, -1.0 };
+
+ const char charInput[] = { 127, 64, -64, -128 };
+ const unsigned char ucharInput[] = { 255, 128+64, 64, 0 };
+ const short shortInput[] = { 32767, 32768/2, -32768/2, -32768 };
+ const int intInput[] = { 2147483647, 2147483647/2, -1073741824 /*-2147483648/2 doesn't work in msvc*/, -2147483648 };
+
+ float floatOutput[4];
+ short shortOutput[4];
+ int intOutput[4];
+ unsigned char ucharOutput[4];
+ char charOutput[4];
+
+ QA_ASSERT_EQUALS("int must be 32-bit", 4, (int) sizeof(int) );
+ QA_ASSERT_EQUALS("short must be 16-bit", 2, (int) sizeof(short) );
+
+ // from Float ======
+ PaQa_ConvertFromFloat( floatInput, 4, paUInt8, ucharOutput );
+ for( i=0; i<4; i++ )
+ {
+ QA_ASSERT_CLOSE_INT( "paFloat32 -> paUInt8 -> error", ucharInput[i], ucharOutput[i], 1 );
+ }
+
+ PaQa_ConvertFromFloat( floatInput, 4, paInt8, charOutput );
+ for( i=0; i<4; i++ )
+ {
+ QA_ASSERT_CLOSE_INT( "paFloat32 -> paInt8 -> error", charInput[i], charOutput[i], 1 );
+ }
+
+ PaQa_ConvertFromFloat( floatInput, 4, paInt16, shortOutput );
+ for( i=0; i<4; i++ )
+ {
+ QA_ASSERT_CLOSE_INT( "paFloat32 -> paInt16 error", shortInput[i], shortOutput[i], 1 );
+ }
+
+ PaQa_ConvertFromFloat( floatInput, 4, paInt32, intOutput );
+ for( i=0; i<4; i++ )
+ {
+ QA_ASSERT_CLOSE_INT( "paFloat32 -> paInt32 error", intInput[i], intOutput[i], 0x00010000 );
+ }
+
+
+ // to Float ======
+ memset( floatOutput, 0, sizeof(floatOutput) );
+ PaQa_ConvertToFloat( ucharInput, 4, paUInt8, floatOutput );
+ for( i=0; i<4; i++ )
+ {
+ QA_ASSERT_CLOSE( "paUInt8 -> paFloat32 error", floatInput[i], floatOutput[i], 0.01 );
+ }
+
+ memset( floatOutput, 0, sizeof(floatOutput) );
+ PaQa_ConvertToFloat( charInput, 4, paInt8, floatOutput );
+ for( i=0; i<4; i++ )
+ {
+ QA_ASSERT_CLOSE( "paInt8 -> paFloat32 error", floatInput[i], floatOutput[i], 0.01 );
+ }
+
+ memset( floatOutput, 0, sizeof(floatOutput) );
+ PaQa_ConvertToFloat( shortInput, 4, paInt16, floatOutput );
+ for( i=0; i<4; i++ )
+ {
+ QA_ASSERT_CLOSE( "paInt16 -> paFloat32 error", floatInput[i], floatOutput[i], 0.001 );
+ }
+
+ memset( floatOutput, 0, sizeof(floatOutput) );
+ PaQa_ConvertToFloat( intInput, 4, paInt32, floatOutput );
+ for( i=0; i<4; i++ )
+ {
+ QA_ASSERT_CLOSE( "paInt32 -> paFloat32 error", floatInput[i], floatOutput[i], 0.00001 );
+ }
+
+ return 0;
+
+error:
+ return -1;
+}
+
+
+/*******************************************************************/
+void usage( const char *name )
+{
+ printf("%s [-i# -o# -l# -r# -s# -m -w -dDir]\n", name);
+ printf(" -i# - Input device ID. Will scan for loopback cable if not specified.\n");
+ printf(" -o# - Output device ID. Will scan for loopback if not specified.\n");
+ printf(" -l# - Latency for both input and output in milliseconds.\n");
+ printf(" --inputLatency # Input latency in milliseconds.\n");
+ printf(" --outputLatency # Output latency in milliseconds.\n");
+ printf(" -r# - Sample Rate in Hz. Will use multiple common rates if not specified.\n");
+ printf(" -s# - Size of callback buffer in frames, framesPerBuffer. Will use common values if not specified.\n");
+ printf(" -w - Save bad recordings in a WAV file.\n");
+ printf(" -dDir - Path for Directory for WAV files. Default is current directory.\n");
+ printf(" -m - Just test the DSP Math code and not the audio devices.\n");
+ printf(" -v - Verbose reports.\n");
+}
+
+/*******************************************************************/
+int main( int argc, char **argv )
+{
+ int i;
+ UserOptions userOptions;
+ int result = 0;
+ int justMath = 0;
+ char *executableName = argv[0];
+
+ printf("PortAudio LoopBack Test built " __DATE__ " at " __TIME__ "\n");
+
+ if( argc > 1 ){
+ printf("running with arguments:");
+ for(i=1; i < argc; ++i )
+ printf(" %s", argv[i] );
+ printf("\n");
+ }else{
+ printf("running with no arguments\n");
+ }
+
+ memset(&userOptions, 0, sizeof(userOptions));
+ userOptions.inputDevice = paNoDevice;
+ userOptions.outputDevice = paNoDevice;
+ userOptions.sampleRate = -1;
+ userOptions.framesPerBuffer = -1;
+ userOptions.inputLatency = -1;
+ userOptions.outputLatency = -1;
+ userOptions.waveFilePath = ".";
+
+ // Process arguments. Skip name of executable.
+ i = 1;
+ while( i<argc )
+ {
+ char *arg = argv[i];
+ if( arg[0] == '-' )
+ {
+ switch(arg[1])
+ {
+ case 'i':
+ userOptions.inputDevice = atoi(&arg[2]);
+ break;
+ case 'o':
+ userOptions.outputDevice = atoi(&arg[2]);
+ break;
+ case 'l':
+ userOptions.inputLatency = userOptions.outputLatency = atoi(&arg[2]);
+ break;
+ case 'r':
+ userOptions.sampleRate = atoi(&arg[2]);
+ break;
+ case 's':
+ userOptions.framesPerBuffer = atoi(&arg[2]);
+ break;
+
+ case 'm':
+ printf("Option -m set so just testing math and not the audio devices.\n");
+ justMath = 1;
+ break;
+
+ case 'w':
+ userOptions.saveBadWaves = 1;
+ break;
+ case 'd':
+ userOptions.waveFilePath = &arg[2];
+ break;
+
+ case 'v':
+ userOptions.verbose = 1;
+ break;
+
+ case 'h':
+ usage( executableName );
+ exit(0);
+ break;
+
+ case '-':
+ {
+ if( strcmp( &arg[2], "inputLatency" ) == 0 )
+ {
+ i += 1;
+ userOptions.inputLatency = atoi(argv[i]);
+ }
+ else if( strcmp( &arg[2], "outputLatency" ) == 0 )
+ {
+ i += 1;
+ userOptions.outputLatency = atoi(argv[i]);
+ }
+ else
+ {
+ printf("Illegal option: %s\n", arg);
+ usage( executableName );
+ exit(1);
+ }
+
+ }
+ break;
+
+
+ default:
+ printf("Illegal option: %s\n", arg);
+ usage( executableName );
+ exit(1);
+ break;
+ }
+ }
+ else
+ {
+ printf("Illegal argument: %s\n", arg);
+ usage( executableName );
+ exit(1);
+
+ }
+ i += 1;
+ }
+
+ result = PaQa_TestAnalyzer();
+
+ // Test sample format conversion tool.
+ result = TestSampleFormatConversion();
+
+ if( (result == 0) && (justMath == 0) )
+ {
+ Pa_Initialize();
+ printf( "PortAudio version number = %d\nPortAudio version text = '%s'\n",
+ Pa_GetVersion(), Pa_GetVersionText() );
+ printf( "=============== PortAudio Devices ========================\n" );
+ PaQa_ListAudioDevices();
+ if( Pa_GetDeviceCount() == 0 )
+ printf( "no devices found.\n" );
+
+ printf( "=============== Detect Loopback ==========================\n" );
+ ScanForLoopback(&userOptions);
+
+ Pa_Terminate();
+ }
+
+ if (g_testsFailed == 0)
+ {
+ printf("PortAudio QA SUCCEEDED! %d tests passed, %d tests failed\n", g_testsPassed, g_testsFailed );
+ return 0;
+
+ }
+ else
+ {
+ printf("PortAudio QA FAILED! %d tests passed, %d tests failed\n", g_testsPassed, g_testsFailed );
+ return 1;
+ }
+}