add initial structure

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;
+}