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authorsanine <sanine.not@pm.me>2022-08-25 14:54:53 -0500
committersanine <sanine.not@pm.me>2022-08-25 14:54:53 -0500
commit37c97e345d12f95dde44e1d1a4c2f2aadd4615bc (patch)
treee1bb25bc855883062bdd7847ff2c04290f71c840 /portaudio/test/patest_wmme_low_level_latency_params.c
parent5634c7b04da619669f2f29f6798c03982be05180 (diff)
add initial structure
Diffstat (limited to 'portaudio/test/patest_wmme_low_level_latency_params.c')
-rw-r--r--portaudio/test/patest_wmme_low_level_latency_params.c191
1 files changed, 191 insertions, 0 deletions
diff --git a/portaudio/test/patest_wmme_low_level_latency_params.c b/portaudio/test/patest_wmme_low_level_latency_params.c
new file mode 100644
index 0000000..31c8892
--- /dev/null
+++ b/portaudio/test/patest_wmme_low_level_latency_params.c
@@ -0,0 +1,191 @@
+/*
+ * $Id: $
+ * Portable Audio I/O Library
+ * Windows MME low level buffer parameters test
+ *
+ * Copyright (c) 2007 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 <math.h>
+
+#include <windows.h> /* required when using pa_win_wmme.h */
+#include <mmsystem.h> /* required when using pa_win_wmme.h */
+
+#include "portaudio.h"
+#include "pa_win_wmme.h"
+
+#define NUM_SECONDS (6)
+#define SAMPLE_RATE (44100)
+
+#define WMME_FRAMES_PER_BUFFER (440)
+#define WMME_BUFFER_COUNT (6)
+
+#define FRAMES_PER_BUFFER WMME_FRAMES_PER_BUFFER /* hardwire portaudio callback buffer size to WMME buffer size for this test */
+
+#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; i<framesPerBuffer; i++ )
+ {
+ float x = data->sine[(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;
+ PaWinMmeStreamInfo wmmeStreamInfo;
+ 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( paMME ) )->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; i<TABLE_SIZE; i++ )
+ {
+ data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
+ }
+
+ data.phase = 0;
+
+ outputParameters.device = deviceIndex;
+ outputParameters.channelCount = CHANNEL_COUNT;
+ outputParameters.sampleFormat = paFloat32; /* 32 bit floating point processing */
+ outputParameters.suggestedLatency = 0; /*Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;*/
+ outputParameters.hostApiSpecificStreamInfo = NULL;
+
+ wmmeStreamInfo.size = sizeof(PaWinMmeStreamInfo);
+ wmmeStreamInfo.hostApiType = paMME;
+ wmmeStreamInfo.version = 1;
+ wmmeStreamInfo.flags = paWinMmeUseLowLevelLatencyParameters | paWinMmeDontThrottleOverloadedProcessingThread;
+ wmmeStreamInfo.framesPerBuffer = WMME_FRAMES_PER_BUFFER;
+ wmmeStreamInfo.bufferCount = WMME_BUFFER_COUNT;
+ outputParameters.hostApiSpecificStreamInfo = &wmmeStreamInfo;
+
+
+ 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;
+}