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Diffstat (limited to 'portaudio/test/patest_stop_playout.c')
| -rw-r--r-- | portaudio/test/patest_stop_playout.c | 478 |
1 files changed, 478 insertions, 0 deletions
diff --git a/portaudio/test/patest_stop_playout.c b/portaudio/test/patest_stop_playout.c new file mode 100644 index 0000000..7e6932e --- /dev/null +++ b/portaudio/test/patest_stop_playout.c @@ -0,0 +1,478 @@ +/** @file patest_stop_playout.c + @ingroup test_src + @brief Test whether all queued samples are played when Pa_StopStream() + is used with a callback or read/write stream, or when the callback + returns paComplete. + @author Ross Bencina <rossb@audiomulch.com> +*/ +/* + * $Id$ + * + * This program uses the PortAudio Portable Audio Library. + * For more information see: http://www.portaudio.com/ + * Copyright (c) 1999-2004 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 <math.h> +#include "portaudio.h" + +#define SAMPLE_RATE (44100) +#define FRAMES_PER_BUFFER (1024) + +#define TONE_SECONDS (1) /* long tone */ +#define TONE_FADE_SECONDS (.04) /* fades at start and end of long tone */ +#define GAP_SECONDS (.25) /* gap between long tone and blip */ +#define BLIP_SECONDS (.035) /* short blip */ + +#define NUM_REPEATS (3) + +#ifndef M_PI +#define M_PI (3.14159265) +#endif + +#define TABLE_SIZE (2048) +typedef struct +{ + float sine[TABLE_SIZE+1]; + + int repeatCount; + + double phase; + double lowIncrement, highIncrement; + + int gap1Length, toneLength, toneFadesLength, gap2Length, blipLength; + int gap1Countdown, toneCountdown, gap2Countdown, blipCountdown; +} +TestData; + + +static void RetriggerTestSignalGenerator( TestData *data ) +{ + data->phase = 0.; + data->gap1Countdown = data->gap1Length; + data->toneCountdown = data->toneLength; + data->gap2Countdown = data->gap2Length; + data->blipCountdown = data->blipLength; +} + + +static void ResetTestSignalGenerator( TestData *data ) +{ + data->repeatCount = 0; + RetriggerTestSignalGenerator( data ); +} + + +static void InitTestSignalGenerator( TestData *data ) +{ + int signalLengthModBufferLength, i; + + /* initialise sinusoidal wavetable */ + for( i=0; i<TABLE_SIZE; i++ ) + { + data->sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ); + } + data->sine[TABLE_SIZE] = data->sine[0]; /* guard point for linear interpolation */ + + + + data->lowIncrement = (330. / SAMPLE_RATE) * TABLE_SIZE; + data->highIncrement = (1760. / SAMPLE_RATE) * TABLE_SIZE; + + data->gap1Length = GAP_SECONDS * SAMPLE_RATE; + data->toneLength = TONE_SECONDS * SAMPLE_RATE; + data->toneFadesLength = TONE_FADE_SECONDS * SAMPLE_RATE; + data->gap2Length = GAP_SECONDS * SAMPLE_RATE; + data->blipLength = BLIP_SECONDS * SAMPLE_RATE; + + /* adjust signal length to be a multiple of the buffer length */ + signalLengthModBufferLength = (data->gap1Length + data->toneLength + data->gap2Length + data->blipLength) % FRAMES_PER_BUFFER; + if( signalLengthModBufferLength > 0 ) + data->toneLength += signalLengthModBufferLength; + + ResetTestSignalGenerator( data ); +} + + +#define MIN( a, b ) (((a)<(b))?(a):(b)) + +static void GenerateTestSignal( TestData *data, float *stereo, int frameCount ) +{ + int framesGenerated = 0; + float output; + long index; + float fraction; + int count, i; + + while( framesGenerated < frameCount && data->repeatCount < NUM_REPEATS ) + { + if( framesGenerated < frameCount && data->gap1Countdown > 0 ){ + count = MIN( frameCount - framesGenerated, data->gap1Countdown ); + for( i=0; i < count; ++i ) + { + *stereo++ = 0.f; + *stereo++ = 0.f; + } + + data->gap1Countdown -= count; + framesGenerated += count; + } + + if( framesGenerated < frameCount && data->toneCountdown > 0 ){ + count = MIN( frameCount - framesGenerated, data->toneCountdown ); + for( i=0; i < count; ++i ) + { + /* tone with data->lowIncrement phase increment */ + index = (long)data->phase; + fraction = data->phase - index; + output = data->sine[ index ] + (data->sine[ index + 1 ] - data->sine[ index ]) * fraction; + + data->phase += data->lowIncrement; + while( data->phase >= TABLE_SIZE ) + data->phase -= TABLE_SIZE; + + /* apply fade to ends */ + + if( data->toneCountdown < data->toneFadesLength ) + { + /* cosine-bell fade out at end */ + output *= (-cos(((float)data->toneCountdown / (float)data->toneFadesLength) * M_PI) + 1.) * .5; + } + else if( data->toneCountdown > data->toneLength - data->toneFadesLength ) + { + /* cosine-bell fade in at start */ + output *= (cos(((float)(data->toneCountdown - (data->toneLength - data->toneFadesLength)) / (float)data->toneFadesLength) * M_PI) + 1.) * .5; + } + + output *= .5; /* play tone half as loud as blip */ + + *stereo++ = output; + *stereo++ = output; + + data->toneCountdown--; + } + + framesGenerated += count; + } + + if( framesGenerated < frameCount && data->gap2Countdown > 0 ){ + count = MIN( frameCount - framesGenerated, data->gap2Countdown ); + for( i=0; i < count; ++i ) + { + *stereo++ = 0.f; + *stereo++ = 0.f; + } + + data->gap2Countdown -= count; + framesGenerated += count; + } + + if( framesGenerated < frameCount && data->blipCountdown > 0 ){ + count = MIN( frameCount - framesGenerated, data->blipCountdown ); + for( i=0; i < count; ++i ) + { + /* tone with data->highIncrement phase increment */ + index = (long)data->phase; + fraction = data->phase - index; + output = data->sine[ index ] + (data->sine[ index + 1 ] - data->sine[ index ]) * fraction; + + data->phase += data->highIncrement; + while( data->phase >= TABLE_SIZE ) + data->phase -= TABLE_SIZE; + + /* cosine-bell envelope over whole blip */ + output *= (-cos( ((float)data->blipCountdown / (float)data->blipLength) * 2. * M_PI) + 1.) * .5; + + *stereo++ = output; + *stereo++ = output; + + data->blipCountdown--; + } + + framesGenerated += count; + } + + + if( data->blipCountdown == 0 ) + { + RetriggerTestSignalGenerator( data ); + data->repeatCount++; + } + } + + if( framesGenerated < frameCount ) + { + count = frameCount - framesGenerated; + for( i=0; i < count; ++i ) + { + *stereo++ = 0.f; + *stereo++ = 0.f; + } + } +} + + +static int IsTestSignalFinished( TestData *data ) +{ + if( data->repeatCount >= NUM_REPEATS ) + return 1; + else + return 0; +} + + +static int TestCallback1( const void *inputBuffer, void *outputBuffer, + unsigned long frameCount, + const PaStreamCallbackTimeInfo* timeInfo, + PaStreamCallbackFlags statusFlags, + void *userData ) +{ + (void) inputBuffer; /* Prevent unused variable warnings. */ + (void) timeInfo; + (void) statusFlags; + + GenerateTestSignal( (TestData*)userData, (float*)outputBuffer, frameCount ); + + if( IsTestSignalFinished( (TestData*)userData ) ) + return paComplete; + else + return paContinue; +} + + +volatile int testCallback2Finished = 0; + +static int TestCallback2( const void *inputBuffer, void *outputBuffer, + unsigned long frameCount, + const PaStreamCallbackTimeInfo* timeInfo, + PaStreamCallbackFlags statusFlags, + void *userData ) +{ + (void) inputBuffer; /* Prevent unused variable warnings. */ + (void) timeInfo; + (void) statusFlags; + + GenerateTestSignal( (TestData*)userData, (float*)outputBuffer, frameCount ); + + if( IsTestSignalFinished( (TestData*)userData ) ) + testCallback2Finished = 1; + + return paContinue; +} + +/*******************************************************************/ +int main(void); +int main(void) +{ + PaStreamParameters outputParameters; + PaStream *stream; + PaError err; + TestData data; + float writeBuffer[ FRAMES_PER_BUFFER * 2 ]; + + printf("PortAudio Test: check that stopping stream plays out all queued samples. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER); + + InitTestSignalGenerator( &data ); + + err = Pa_Initialize(); + if( err != paNoError ) goto error; + + outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */ + outputParameters.channelCount = 2; /* stereo output */ + outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ + outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency; + outputParameters.hostApiSpecificStreamInfo = NULL; + +/* test paComplete ---------------------------------------------------------- */ + + ResetTestSignalGenerator( &data ); + + err = Pa_OpenStream( + &stream, + NULL, /* no input */ + &outputParameters, + SAMPLE_RATE, + FRAMES_PER_BUFFER, + paClipOff, /* we won't output out of range samples so don't bother clipping them */ + TestCallback1, + &data ); + if( err != paNoError ) goto error; + + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + printf("\nPlaying 'tone-blip' %d times using callback, stops by returning paComplete from callback.\n", NUM_REPEATS ); + printf("If final blip is not intact, callback+paComplete implementation may be faulty.\n\n" ); + + while( (err = Pa_IsStreamActive( stream )) == 1 ) + Pa_Sleep( 2 ); + + if( err != 0 ) goto error; + + err = Pa_StopStream( stream ); + if( err != paNoError ) goto error; + + err = Pa_CloseStream( stream ); + if( err != paNoError ) goto error; + + Pa_Sleep( 500 ); + + +/* test paComplete ---------------------------------------------------------- */ + + ResetTestSignalGenerator( &data ); + + err = Pa_OpenStream( + &stream, + NULL, /* no input */ + &outputParameters, + SAMPLE_RATE, + FRAMES_PER_BUFFER, + paClipOff, /* we won't output out of range samples so don't bother clipping them */ + TestCallback1, + &data ); + if( err != paNoError ) goto error; + + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + printf("\nPlaying 'tone-blip' %d times using callback, stops by returning paComplete from callback.\n", NUM_REPEATS ); + printf("If final blip is not intact or is followed by garbage, callback+paComplete implementation may be faulty.\n\n" ); + + while( (err = Pa_IsStreamActive( stream )) == 1 ) + Pa_Sleep( 5 ); + + printf("Waiting 5 seconds after paComplete before stopping the stream. Tests that buffers are flushed correctly.\n"); + Pa_Sleep( 5000 ); + + if( err != 0 ) goto error; + + err = Pa_StopStream( stream ); + if( err != paNoError ) goto error; + + err = Pa_CloseStream( stream ); + if( err != paNoError ) goto error; + + Pa_Sleep( 500 ); + + +/* test Pa_StopStream() with callback --------------------------------------- */ + + ResetTestSignalGenerator( &data ); + + testCallback2Finished = 0; + + err = Pa_OpenStream( + &stream, + NULL, /* no input */ + &outputParameters, + SAMPLE_RATE, + FRAMES_PER_BUFFER, + paClipOff, /* we won't output out of range samples so don't bother clipping them */ + TestCallback2, + &data ); + if( err != paNoError ) goto error; + + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + + printf("\nPlaying 'tone-blip' %d times using callback, stops by calling Pa_StopStream.\n", NUM_REPEATS ); + printf("If final blip is not intact, callback+Pa_StopStream implementation may be faulty.\n\n" ); + + /* note that polling a volatile flag is not a good way to synchronise with + the callback, but it's the best we can do portably. */ + while( !testCallback2Finished ) + Pa_Sleep( 2 ); + + Pa_Sleep( 500 ); + + err = Pa_StopStream( stream ); + if( err != paNoError ) goto error; + + + err = Pa_CloseStream( stream ); + if( err != paNoError ) goto error; + + Pa_Sleep( 500 ); + +/* test Pa_StopStream() with Pa_WriteStream --------------------------------- */ + + ResetTestSignalGenerator( &data ); + + err = Pa_OpenStream( + &stream, + NULL, /* no input */ + &outputParameters, + SAMPLE_RATE, + FRAMES_PER_BUFFER, + paClipOff, /* we won't output out of range samples so don't bother clipping them */ + NULL, /* no callback, use blocking API */ + NULL ); /* no callback, so no callback userData */ + if( err != paNoError ) goto error; + + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + + printf("\nPlaying 'tone-blip' %d times using Pa_WriteStream, stops by calling Pa_StopStream.\n", NUM_REPEATS ); + printf("If final blip is not intact, Pa_WriteStream+Pa_StopStream implementation may be faulty.\n\n" ); + + do{ + GenerateTestSignal( &data, writeBuffer, FRAMES_PER_BUFFER ); + err = Pa_WriteStream( stream, writeBuffer, FRAMES_PER_BUFFER ); + if( err != paNoError ) goto error; + + }while( !IsTestSignalFinished( &data ) ); + + err = Pa_StopStream( stream ); + if( err != paNoError ) goto error; + + + err = Pa_CloseStream( stream ); + if( err != paNoError ) goto error; + +/* -------------------------------------------------------------------------- */ + + Pa_Terminate(); + printf("Test finished.\n"); + + return err; + +error: + Pa_Terminate(); + fprintf( stderr, "An error occurred while using the portaudio stream\n" ); + fprintf( stderr, "Error number: %d\n", err ); + fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); + return err; +} |