From 37c97e345d12f95dde44e1d1a4c2f2aadd4615bc Mon Sep 17 00:00:00 2001 From: sanine Date: Thu, 25 Aug 2022 14:54:53 -0500 Subject: add initial structure --- .../test/patest_dsound_low_level_latency_params.c | 186 +++++++++++++++++++++ 1 file changed, 186 insertions(+) create mode 100644 portaudio/test/patest_dsound_low_level_latency_params.c (limited to 'portaudio/test/patest_dsound_low_level_latency_params.c') diff --git a/portaudio/test/patest_dsound_low_level_latency_params.c b/portaudio/test/patest_dsound_low_level_latency_params.c new file mode 100644 index 0000000..d583e69 --- /dev/null +++ b/portaudio/test/patest_dsound_low_level_latency_params.c @@ -0,0 +1,186 @@ +/* + * $Id: $ + * Portable Audio I/O Library + * Windows DirectSound low level buffer parameters test + * + * Copyright (c) 2011 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 +#include + +#include "portaudio.h" +#include "pa_win_ds.h" + +#define NUM_SECONDS (6) +#define SAMPLE_RATE (44100) + +#define DSOUND_FRAMES_PER_HOST_BUFFER (256*2) //(440*10) + +#define FRAMES_PER_BUFFER 256 + +#ifndef M_PI +#define M_PI (3.14159265) +#endif + +#define TABLE_SIZE (2048) + +#define CHANNEL_COUNT (2) + + +typedef struct +{ + float sine[TABLE_SIZE]; + double phase; +} +paTestData; + +/* This routine will be called by the PortAudio engine when audio is needed. +** It may called at interrupt level on some machines so don't do anything +** that could mess up the system like calling malloc() or free(). +*/ +static int patestCallback( const void *inputBuffer, void *outputBuffer, + unsigned long framesPerBuffer, + const PaStreamCallbackTimeInfo* timeInfo, + PaStreamCallbackFlags statusFlags, + void *userData ) +{ + paTestData *data = (paTestData*)userData; + float *out = (float*)outputBuffer; + unsigned long i,j; + + (void) timeInfo; /* Prevent unused variable warnings. */ + (void) statusFlags; + (void) inputBuffer; + + for( i=0; isine[(int)data->phase]; + data->phase += 20; + if( data->phase >= TABLE_SIZE ){ + data->phase -= TABLE_SIZE; + } + + for( j = 0; j < CHANNEL_COUNT; ++j ){ + *out++ = x; + } + } + + return paContinue; +} + +/*******************************************************************/ +int main(int argc, char* argv[]) +{ + PaStreamParameters outputParameters; + PaWinDirectSoundStreamInfo dsoundStreamInfo; + PaStream *stream; + PaError err; + paTestData data; + int i; + int deviceIndex; + + printf("PortAudio Test: output a sine blip on each channel. SR = %d, BufSize = %d, Chans = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER, CHANNEL_COUNT); + + err = Pa_Initialize(); + if( err != paNoError ) goto error; + + deviceIndex = Pa_GetHostApiInfo( Pa_HostApiTypeIdToHostApiIndex( paDirectSound ) )->defaultOutputDevice; + if( argc == 2 ){ + sscanf( argv[1], "%d", &deviceIndex ); + } + + printf( "using device id %d (%s)\n", deviceIndex, Pa_GetDeviceInfo(deviceIndex)->name ); + + /* initialise sinusoidal wavetable */ + for( i=0; idefaultLowOutputLatency;*/ + outputParameters.hostApiSpecificStreamInfo = NULL; + + dsoundStreamInfo.size = sizeof(PaWinDirectSoundStreamInfo); + dsoundStreamInfo.hostApiType = paDirectSound; + dsoundStreamInfo.version = 2; + dsoundStreamInfo.flags = paWinDirectSoundUseLowLevelLatencyParameters; + dsoundStreamInfo.framesPerBuffer = DSOUND_FRAMES_PER_HOST_BUFFER; + outputParameters.hostApiSpecificStreamInfo = &dsoundStreamInfo; + + + if( Pa_IsFormatSupported( 0, &outputParameters, SAMPLE_RATE ) == paFormatIsSupported ){ + printf( "Pa_IsFormatSupported reports device will support %d channels.\n", CHANNEL_COUNT ); + }else{ + printf( "Pa_IsFormatSupported reports device will not support %d channels.\n", CHANNEL_COUNT ); + } + + 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 */ + patestCallback, + &data ); + if( err != paNoError ) goto error; + + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + printf("Play for %d seconds.\n", NUM_SECONDS ); + Pa_Sleep( NUM_SECONDS * 1000 ); + + 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; +} -- cgit v1.2.1