本文整理汇总了C++中Pa_GetDefaultOutputDevice函数的典型用法代码示例。如果您正苦于以下问题：C++ Pa_GetDefaultOutputDevice函数的具体用法？C++ Pa_GetDefaultOutputDevice怎么用？C++ Pa_GetDefaultOutputDevice使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了Pa_GetDefaultOutputDevice函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。
示例1: Pa_Initialize
int AudioStreamManager::StreamAudio(ISoundDelegate* delegate)
{
PaStreamParameters inputParameters, outputParameters;
PaError err;
soundDelegate = delegate;
err = Pa_Initialize();
if (err != paNoError) goto error;
inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
if (inputParameters.device == paNoDevice) {
fprintf(stderr, "Error: No default input device.\n");
goto error;
}
inputParameters.channelCount = 2; /* stereo input */
inputParameters.sampleFormat = PA_SAMPLE_TYPE;
inputParameters.suggestedLatency = Pa_GetDeviceInfo(inputParameters.device)->defaultLowInputLatency;
inputParameters.hostApiSpecificStreamInfo = NULL;
outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
if (outputParameters.device == paNoDevice) {
fprintf(stderr, "Error: No default output device.\n");
goto error;
}
outputParameters.channelCount = 2; /* stereo output */
outputParameters.sampleFormat = PA_SAMPLE_TYPE;
outputParameters.suggestedLatency = Pa_GetDeviceInfo(outputParameters.device)->defaultLowOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
err = Pa_OpenStream(
&audioStream,
&inputParameters,
&outputParameters,
SAMPLE_RATE,
FRAMES_PER_BUFFER,
0, /* paClipOff, */ /* we won't output out of range samples so don't bother clipping them */
readStreamCallback,
NULL);
if (err != paNoError) goto error;
delegate->willBeginPlay();
err = Pa_StartStream(audioStream);
if (err != paNoError) goto error;
return 0;
error:
Pa_Terminate();
fprintf(stderr, "An error occured while using the portaudio stream\n");
fprintf(stderr, "Error number: %d\n", err);
fprintf(stderr, "Error message: %s\n", Pa_GetErrorText(err));
delegate->didEndPlay();
return -1;
}
开发者ID:garbagemza，项目名称:fv1-emu，代码行数:55，代码来源:AudioStreamManager.cpp
示例2: freeBuffers
void GuitarSori::init( const int mFramesPerBuffer, const int mNumChannels, const int mSampleSize, PaSampleFormat mSampleFormat, const double mSampleRate)
{
int numBytes, numBytesConverted;
framesPerBuffer = mFramesPerBuffer;
numChannels = mNumChannels;
sampleSize = mSampleSize;
sampleFormat = mSampleFormat;
sampleRate = mSampleRate;
numBytes = mFramesPerBuffer * mNumChannels * mSampleSize;
numBytesConverted = mFramesPerBuffer * mNumChannels * 8;
freeBuffers();
sampleBlock = (char *)malloc(numBytes);
sampleBlockConverted = (double *)malloc(numBytesConverted);
sampleBlockFFT = (double *)malloc(numBytesConverted / 2);
if ( !isBuffersReady() )
{
printf("Cannot allocate sample block\n");
return;
}
memset(sampleBlock, 0x00, numBytes);
memset(sampleBlockConverted, 0x00, numBytesConverted);
memset(sampleBlockFFT, 0x00, numBytesConverted / 2);
err = Pa_Initialize();
printf("──────────────────────────────\n");
inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
inputParameters.device = 1;
printf("Input device # %d. : %s\n", inputParameters.device, Pa_GetDeviceInfo(inputParameters.device)->name);
printf("Input LL: %g s\n", Pa_GetDeviceInfo(inputParameters.device)->defaultLowInputLatency);
printf("Input HL: %g s\n", Pa_GetDeviceInfo(inputParameters.device)->defaultHighInputLatency);
printf("Input HL: %g s\n", Pa_GetDeviceInfo(inputParameters.device)->defaultHighInputLatency);
printf("Input Channel(MAX.) : %d ", Pa_GetDeviceInfo(inputParameters.device)->maxInputChannels);
inputParameters.channelCount = numChannels;
inputParameters.sampleFormat = sampleFormat;
inputParameters.suggestedLatency = Pa_GetDeviceInfo(inputParameters.device)->defaultHighInputLatency;
inputParameters.hostApiSpecificStreamInfo = NULL;
outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
printf("Output device # %d.\n", outputParameters.device);
printf("Output LL: %g s\n", Pa_GetDeviceInfo(outputParameters.device)->defaultLowOutputLatency);
printf("Output HL: %g s\n", Pa_GetDeviceInfo(outputParameters.device)->defaultHighOutputLatency);
outputParameters.channelCount = numChannels;
outputParameters.sampleFormat = sampleFormat;
outputParameters.suggestedLatency = Pa_GetDeviceInfo(outputParameters.device)->defaultHighOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
err = Pa_OpenStream(&stream, &inputParameters, &outputParameters, sampleRate, framesPerBuffer, paClipOff, NULL, NULL);
err = Pa_StartStream(stream);
}
开发者ID:flpeng00，项目名称:GuitarSori，代码行数:55，代码来源:GuitarSori.cpp
示例3: main
int main(void)
{
PaStreamParameters outputParameters;
PaStream *stream;
PaError err;
paTestData data;
int i;
printf("PortAudio Test: output sine wave.\n");
/* initialise sinusoidal wavetable */
for( i=0; i<TABLE_SIZE; i++ )
{
data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
}
data.left_phase = data.right_phase = 0;
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 )->defaultLowOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
err = Pa_OpenStream( &stream,
NULL, /* No input. */
&outputParameters, /* As above. */
SAMPLE_RATE,
256, /* Frames per buffer. */
paClipOff, /* No out of range samples expected. */
patestCallback,
&data );
if( err != paNoError ) goto error;
err = Pa_StartStream( stream );
if( err != paNoError ) goto error;
printf("Hit ENTER to stop program.\n");
getchar();
err = Pa_CloseStream( stream );
if( err != paNoError ) goto error;
Pa_Terminate();
printf("Test finished.\n");
return err;
error:
Pa_Terminate();
fprintf( stderr, "An error occured while using the portaudio stream\n" );
fprintf( stderr, "Error number: %d\n", err );
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
return err;
}
开发者ID:AaronFae，项目名称:VimProject，代码行数:55，代码来源:patest_longsine.c
示例4: init_media_processing
static int init_media_processing(avdtp_media_codec_configuration_sbc_t configuration){
int num_channels = configuration.num_channels;
int sample_rate = configuration.sampling_frequency;
#ifdef DECODE_SBC
btstack_sbc_decoder_init(&state, mode, handle_pcm_data, NULL);
#endif
#ifdef STORE_SBC_TO_WAV_FILE
wav_writer_open(wav_filename, num_channels, sample_rate);
#endif
#ifdef STORE_SBC_TO_SBC_FILE
sbc_file = fopen(sbc_filename, "wb");
#endif
#ifdef HAVE_PORTAUDIO
// int frames_per_buffer = configuration.frames_per_buffer;
PaError err;
PaStreamParameters outputParameters;
/* -- initialize PortAudio -- */
err = Pa_Initialize();
if (err != paNoError){
printf("Error initializing portaudio: \"%s\"\n", Pa_GetErrorText(err));
return err;
}
/* -- setup input and output -- */
outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
outputParameters.channelCount = num_channels;
outputParameters.sampleFormat = PA_SAMPLE_TYPE;
outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
/* -- setup stream -- */
err = Pa_OpenStream(
&stream,
NULL, /* &inputParameters */
&outputParameters,
sample_rate,
0,
paClipOff, /* we won't output out of range samples so don't bother clipping them */
patestCallback, /* use callback */
NULL );
if (err != paNoError){
printf("Error initializing portaudio: \"%s\"\n", Pa_GetErrorText(err));
return err;
}
memset(ring_buffer_storage, 0, sizeof(ring_buffer_storage));
btstack_ring_buffer_init(&ring_buffer, ring_buffer_storage, sizeof(ring_buffer_storage));
pa_stream_started = 0;
#endif
media_initialized = 1;
return 0;
}
开发者ID:notmikeb，项目名称:btstack，代码行数:55，代码来源:avdtp_sink_test.c
示例5: handle_sound
void handle_sound(adata_t *data)
{
PaStream *stream;
PaError error;
PaStreamParameters outputParameters;
/* initialize our data structure */
data->position = 0;
data->thread_idle = 0;
data->sfInfo.format = SF_FORMAT_OGG;
/* try to open the file */
data->sndFile = sf_open(data->filepath, SFM_READ, &data->sfInfo);
if (!data->sndFile)
{
printf("error opening file\n");
exit(1);
}
/* start portaudio */
Pa_Initialize();
/* set the output parameters */
outputParameters.device = Pa_GetDefaultOutputDevice(); /* use the default device */
outputParameters.channelCount = data->sfInfo.channels; /* use the same number of channels as our sound file */
outputParameters.sampleFormat = paInt32; /* 32bit int format */
outputParameters.suggestedLatency = 0.2; /* 200 ms ought to satisfy even the worst sound card */
outputParameters.hostApiSpecificStreamInfo = 0; /* no api specific data */
/* try to open the output */
error = Pa_OpenStream(&stream, /* stream is a 'token' that we need to save for future portaudio calls */
0, /* no input */
&outputParameters,
data->sfInfo.samplerate, /* use the same sample rate as the sound file */
paFramesPerBufferUnspecified, /* let portaudio choose the buffersize */
paNoFlag, /* no special modes (clip off, dither off) */
Callback, /* callback function defined above */
data ); /* pass in our data structure so the callback knows what's up */
/* if we can't open it, then bail out */
if (error)
{
printf("error opening output, error code = %i\n", error);
Pa_Terminate();
}
/* when we start the stream, the callback starts getting called */
Pa_StartStream(stream);
long ms_length = ((double)data->sfInfo.frames / (double)data->sfInfo.samplerate) * 1000.;
Pa_Sleep(ms_length);
Pa_CloseStream(stream); // stop the stream
(*data).thread_complete = 1;
Pa_Terminate(); // and shut down portaudio
}
开发者ID:blueForestIcarus，项目名称:cgame，代码行数:54，代码来源:sound.c
示例6: main
int main()
{
SndData *data = (SndData *)malloc(sizeof(SndData));
PaStream *stream;
PaError error;
PaStreamParameters outputParameters;
/* initialize our data structure */
data->position = 0;
data->sfInfo.format = 0;
/* try to open the file */
data->sndFile = sf_open(FILE_NAME, SFM_READ, &data->sfInfo);
if (!data->sndFile)
{
printf("error opening file\n");
return 1;
}
/* start portaudio */
Pa_Initialize();
/* set the output parameters */
outputParameters.device = Pa_GetDefaultOutputDevice(); /* use the default device */
outputParameters.channelCount = data->sfInfo.channels; /* use the same number of channels as our sound file */
outputParameters.sampleFormat = paInt32; /* 32bit int format */
outputParameters.suggestedLatency = 0.01; /* 10 ms latency, if possible */
outputParameters.hostApiSpecificStreamInfo = 0; /* no api specific data */
/* try to open the output */
error = Pa_OpenStream(&stream, /* stream is a 'token' that we need to save for future portaudio calls */
0, /* no input */
&outputParameters,
data->sfInfo.samplerate, /* use the same sample rate as the sound file */
paFramesPerBufferUnspecified, /* let portaudio choose the buffersize */
paNoFlag, /* no special modes (clip off, dither off) */
Callback, /* callback function defined above */
data ); /* pass in our data structure so the callback knows what's up */
/* if we can't open it, then bail out */
if (error) {
printf("error opening output, error code = %i\n", error);
Pa_Terminate();
return 1;
}
/* when we start the stream, the callback starts getting called */
Pa_StartStream(stream);
Pa_Sleep(2000); /* pause for 2 seconds (2000ms) so we can hear a bit of the output */
Pa_StopStream(stream); // stop the stream
Pa_Terminate(); // and shut down portaudio
return 0;
}
开发者ID:skykooler，项目名称:FreeJam，代码行数:53，代码来源:patest.cpp
示例7: test
int test(short interleaved)
{
PaStream* stream;
PaStreamParameters outputParameters;
PaError err;
const PaDeviceInfo* pdi;
paTestData data;
short n;
outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device, max channels. */
pdi = Pa_GetDeviceInfo(outputParameters.device);
outputParameters.channelCount = pdi->maxOutputChannels;
if (outputParameters.channelCount > MAX_CHANNELS)
outputParameters.channelCount = MAX_CHANNELS;
outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */
outputParameters.suggestedLatency = pdi->defaultLowOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
data.interleaved = interleaved;
data.numChannels = outputParameters.channelCount;
for (n = 0; n < data.numChannels; n++)
data.phases[n] = 0.0; /* Phases wrap and maybe don't need initialisation. */
printf("%d ", data.numChannels);
if (interleaved)
printf("interleaved ");
else
{
printf(" non-interleaved ");
outputParameters.sampleFormat |= paNonInterleaved;
}
printf("channels.\n");
err = Pa_OpenStream(&stream,
NULL, /* No input. */
&outputParameters,
SAMPLE_RATE, /* Sample rate. */
FRAMES_PER_BUFFER, /* Frames per buffer. */
paClipOff, /* Samples never out of range, no clipping. */
patestCallback,
&data);
if (err == paNoError)
{
err = Pa_StartStream(stream);
if (err == paNoError)
{
printf("Hit ENTER to stop this test.\n");
getchar();
err = Pa_StopStream(stream);
}
Pa_CloseStream( stream );
}
return err;
}
开发者ID:svn2github，项目名称:PortAudio，代码行数:53，代码来源:patest_multi_sine.c
示例8: quisk_pa_name2index
static int quisk_pa_name2index (struct sound_dev * dev, int is_capture)
{ // Based on the device name, set the portaudio index, or -1.
// Return non-zero for error. Not a portaudio device is not an error.
const PaDeviceInfo * pInfo;
int i, count;
if (strncmp (dev->name, "portaudio", 9)) {
dev->portaudio_index = -1; // Name does not start with "portaudio"
return 0; // Not a portaudio device, not an error
}
if ( ! strcmp (dev->name, "portaudiodefault")) {
if (is_capture) // Fill in the default device index
dev->portaudio_index = Pa_GetDefaultInputDevice();
else
dev->portaudio_index = Pa_GetDefaultOutputDevice();
strncpy (dev->msg1, "Using default portaudio device", QUISK_SC_SIZE);
return 0;
}
if ( ! strncmp (dev->name, "portaudio#", 10)) { // Integer index follows "#"
dev->portaudio_index = i = atoi(dev->name + 10);
pInfo = Pa_GetDeviceInfo(i);
if (pInfo) {
snprintf (dev->msg1, QUISK_SC_SIZE, "PortAudio device %s", pInfo->name);
return 0;
}
else {
snprintf (quisk_sound_state.err_msg, QUISK_SC_SIZE,
"Can not find portaudio device number %s", dev->name + 10);
}
return 1;
}
if ( ! strncmp (dev->name, "portaudio:", 10)) {
dev->portaudio_index = -1;
count = Pa_GetDeviceCount(); // Search for string in device name
for (i = 0; i < count; i++) {
pInfo = Pa_GetDeviceInfo(i);
if (pInfo && strstr(pInfo->name, dev->name + 10)) {
dev->portaudio_index = i;
snprintf (dev->msg1, QUISK_SC_SIZE, "PortAudio device %s", pInfo->name);
break;
}
}
if (dev->portaudio_index == -1) { // Error
snprintf (quisk_sound_state.err_msg, QUISK_SC_SIZE,
"Can not find portaudio device named %s", dev->name + 10);
return 1;
}
return 0;
}
snprintf (quisk_sound_state.err_msg, QUISK_SC_SIZE,
"Did not recognize portaudio device %s", dev->name);
return 1;
}
开发者ID:JeremyGrosser，项目名称:quisk，代码行数:53，代码来源:sound_portaudio.c
示例9: pa_setsp
static int pa_setsp(rsound *rsnd, PaStreamParameters *sp)
{
sp->device = Pa_GetDefaultOutputDevice();
if (sp->device == paNoDevice) {
return -1;
}
sp->channelCount = 2; /* stereo output */
sp->sampleFormat = paFloat32; /* 32bit floating point output */
sp->suggestedLatency = Pa_GetDeviceInfo(sp->device)->defaultLowOutputLatency;
return 0;
}
开发者ID:ryohashimoto，项目名称:roscil，代码行数:12，代码来源:roscil.c
示例10: close
bool PortAudio::open(long rate, int channels)
{
if(mRate != rate || mChannels != channels) {
close();
}
if(!isOpen) {
//PaDeviceIndex default_device = 2;
PaDeviceIndex default_device = Pa_GetDefaultOutputDevice();
if( default_device == paNoDevice ) {
LOG4CXX_ERROR(narratorPaLog, "Pa_GetDefaultOutputDevice failed, however, device count is: " << Pa_GetDeviceCount() );
return false;
}
mOutputParameters.device = default_device; /* default output device */
mOutputParameters.channelCount = channels;
mOutputParameters.sampleFormat = paFloat32;
mOutputParameters.suggestedLatency = Pa_GetDeviceInfo( mOutputParameters.device )->defaultHighOutputLatency;
mOutputParameters.hostApiSpecificStreamInfo = NULL;
const PaDeviceInfo* devinfo = Pa_GetDeviceInfo(mOutputParameters.device);
const PaHostApiInfo* hostapiinfo = Pa_GetHostApiInfo(devinfo->hostApi);
LOG4CXX_DEBUG(narratorPaLog, "Opening device: " << devinfo->name << " (" << hostapiinfo->name << "), channels: " << channels << ", rate: " << rate <<" (" << devinfo->defaultSampleRate << ")");
unsigned long framesPerBuffer = 1024;
#ifdef WIN32
framesPerBuffer = 4096;
#endif
mError = Pa_OpenStream(&pStream, NULL, &mOutputParameters, rate, framesPerBuffer/*paFramesPerBufferUnspecified*/,
paNoFlag, pa_stream_callback, this);
if(mError != paNoError) {
LOG4CXX_ERROR(narratorPaLog, "Failed to open stream: " << Pa_GetErrorText(mError));
return false;
}
mRate = rate;
mChannels = channels;
isOpen = true;
isStarted = false;
mError = Pa_SetStreamFinishedCallback(pStream, pa_stream_finished_callback);
if(mError != paNoError) {
LOG4CXX_ERROR(narratorPaLog, "Failed to set FinishedCallback: " << Pa_GetErrorText(mError));
}
}
return true;
}
开发者ID:kolibre，项目名称:libkolibre-narrator，代码行数:53，代码来源:PortAudio.cpp
示例11: TestOnce
PaError TestOnce( int buffersize, PaDeviceIndex device )
{
PaStreamParameters outputParameters;
PaStream *stream;
PaError err;
paTestData data;
int i;
int totalSamps;
/* initialise sinusoidal wavetable */
for( i=0; i<TABLE_SIZE; i++ )
{
data.sine[i] = (short) (32767.0 * sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ));
}
data.left_phase = data.right_phase = 0;
data.sampsToGo = totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
err = Pa_Initialize();
if( err != paNoError ) goto error;
if( device == -1 )
outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
else
outputParameters.device = device ;
outputParameters.channelCount = 2; /* stereo output */
outputParameters.sampleFormat = paInt16; /* 32 bit floating point output */
outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
err = Pa_OpenStream(
&stream,
NULL, /* no input */
&outputParameters,
SAMPLE_RATE,
buffersize, /* frames per buffer */
(paClipOff | paDitherOff),
patest1Callback,
&data );
if( err != paNoError ) goto error;
err = Pa_StartStream( stream );
if( err != paNoError ) goto error;
printf("Waiting for sound to finish.\n");
Pa_Sleep(1000*NUM_SECONDS);
err = Pa_CloseStream( stream );
if( err != paNoError ) goto error;
Pa_Terminate();
return paNoError;
error:
Pa_Terminate();
fprintf( stderr, "An error occured while using the portaudio stream\n" );
fprintf( stderr, "Error number: %d\n", err );
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
fprintf( stderr, "Host Error message: %s\n", Pa_GetLastHostErrorInfo()->errorText );
return err;
}
开发者ID:andreipaga，项目名称:audacity，代码行数:53，代码来源:patest_buffer.c
示例12: main
int main(void)
{
PaStream *stream;
PaStreamParameters outputParameters;
PaError err;
paTestData data;
int totalSamps;
printf("PortAudio Test: output " FORMAT_NAME "\n");
data.left_phase = data.right_phase = 0.0;
data.framesToGo = totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
err = Pa_Initialize();
if( err != paNoError ) goto error;
outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device. */
outputParameters.channelCount = 2; /* Stereo output */
outputParameters.sampleFormat = TEST_FORMAT; /* Selected above. */
outputParameters.suggestedLatency = Pa_GetDeviceInfo(outputParameters.device)->defaultLowOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
err = Pa_OpenStream( &stream,
NULL, /* No input. */
&outputParameters, /* As above. */
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("Waiting %d seconds for sound to finish.\n", NUM_SECONDS );
while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(100);
if( err < 0 ) goto error;
err = Pa_CloseStream( stream );
if( err != paNoError ) goto error;
Pa_Terminate();
printf("PortAudio Test Finished: " FORMAT_NAME "\n");
return err;
error:
Pa_Terminate();
fprintf( stderr, "An error occured while using the portaudio stream\n" );
fprintf( stderr, "Error number: %d\n", err );
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
return err;
}
开发者ID:AFilli，项目名称:Second-Law，代码行数:53，代码来源:patest_sine_formats.c
示例13: main
int main( int argc, const char ** argv )
{
PaStreamParameters outputParameters;
PaError pa_err;
SF_INFO sfinfo;
int i;
for (i = 1; i < argc; i++)
{
if (!strncmp(argv[i], "-m", 2))
{
mute = 1;
}
if (!strncmp(argv[i], "-o", 2))
{
to_stdout = 1;
}
}
gen_default_drums();
pa_err = Pa_Initialize();
outputParameters.device = Pa_GetDefaultOutputDevice();
outputParameters.channelCount = CHANNELS;
outputParameters.sampleFormat = paFloat32;
outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
pa_err = Pa_OpenStream( &stream, NULL, &outputParameters, SAMPLE_RATE, BUFFER_SIZE, paClipOff, audio_callback, NULL );
sfinfo.samplerate = SAMPLE_RATE;
sfinfo.channels = CHANNELS;
sfinfo.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
wave_output = sf_open( OUTPUT_FILE, SFM_WRITE, &sfinfo );
convert_buf = (int32_t*)malloc(SAMPLE_RATE * 4 * 2);
srand( time( 0 ) );
bass_z = 0.0f;
bass_freq = midi_to_hz( BASE_NOTE );
pa_err = Pa_StartStream( stream );
while( 1 )
Pa_Sleep( 10000 );
sf_close( wave_output );
pa_err = Pa_StopStream( stream );
pa_err = Pa_CloseStream( stream );
Pa_Terminate();
return 0;
}
开发者ID:Claudiu，项目名称:jeg，代码行数:53，代码来源:jeg.c
示例14: main
int main(void)
{
PaStream *stream;
PaError err;
paTestData data;
int i;
printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER);
/* initialise sinusoidal wavetable */
for( i=0; i<TABLE_SIZE; i++ )
{
data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
}
data.left_phase = data.right_phase = 0;
err = Pa_Initialize();
if( err != paNoError ) goto error;
err = Pa_OpenStream(
&stream,
paNoDevice,/* default input device */
0, /* no input */
paFloat32, /* 32 bit floating point input */
0, /* default latency */
NULL,
Pa_GetDefaultOutputDevice(), /* default output device */
2, /* stereo output */
paFloat32, /* 32 bit floating point output */
0, /* default latency */
NULL,
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 occured while using the portaudio stream\n" );
fprintf( stderr, "Error number: %d\n", err );
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
return err;
}
开发者ID:Excalibur201010，项目名称:sharpsdr，代码行数:52，代码来源:patest_sine.c
示例15: Pa_GetDefaultOutputDevice
PaDeviceIndex SoundcardDialog::getOutputSource()
{
int index = ui->outputComboBox->currentIndex();
if (index == -1)
{
// no item was selected, so we return the
// default input device
return Pa_GetDefaultOutputDevice();
}
else
{
bool ok;
PaDeviceIndex idx = ui->outputComboBox->itemData(index).toInt(&ok);
if (!ok)
{
// conversion to int not succesfull
// return the default input device .. :(
return Pa_GetDefaultOutputDevice();
}
return idx;
}
}
开发者ID:trcwm，项目名称:BasicDSP，代码行数:22，代码来源:soundcarddialog.cpp
示例16: setupDefaultOutputParameters
/**
* Initializes the output parameters for playback
*
* Function will initailize all the members of the passed
* in PaStreamParameters struct.
* @param out_pars a pointer to a PaStreamParameters struct.
* @param format the sample format for the output device to use
*/
void setupDefaultOutputParameters( PaStreamParameters *out_pars,
PaSampleFormat format)
{
out_pars->device = Pa_GetDefaultOutputDevice();
if (out_pars->device == paNoDevice)
fatal_terminate("No default output device");
out_pars->channelCount =
Pa_GetDeviceInfo(out_pars->device)-> maxOutputChannels;
out_pars->sampleFormat = format;
out_pars->suggestedLatency =
Pa_GetDeviceInfo(out_pars->device)->defaultLowOutputLatency;
out_pars->hostApiSpecificStreamInfo = NULL;
}
开发者ID:amill676，项目名称:realtime_audio，代码行数:21，代码来源:audio_tools.c
示例17: prepare_audio
LVAL prepare_audio(LVAL play, SF_INFO *sf_info, PaStream **audio_stream)
{
PaStreamParameters output_parameters;
int i;
int num_devices;
const PaDeviceInfo *device_info;
const PaHostApiInfo *host_info;
if (!portaudio_initialized) {
if (portaudio_error(Pa_Initialize(),
"could not initialize portaudio")) {
return NIL;
}
portaudio_initialized = TRUE;
}
output_parameters.device = Pa_GetDefaultOutputDevice();
output_parameters.channelCount = sf_info->channels;
output_parameters.sampleFormat = paFloat32;
output_parameters.hostApiSpecificStreamInfo = NULL;
/* remember that Nyquist has to do GC */
output_parameters.suggestedLatency = sound_latency;
// Initialize the audio stream for output
// If this is Linux, prefer to open ALSA device
num_devices = Pa_GetDeviceCount();
for (i = 0; i < num_devices; i++) {
device_info = Pa_GetDeviceInfo(i);
host_info = Pa_GetHostApiInfo(device_info->hostApi);
if (host_info->type == paALSA) {
output_parameters.device = i;
break;
}
}
if (portaudio_error(
Pa_OpenStream(audio_stream, NULL /* input */, &output_parameters,
sf_info->samplerate, max_sample_block_len,
paClipOff, NULL /* callback */, NULL /* userdata */),
"could not open audio")) {
return NIL;
}
flush_count = (long) (sf_info->samplerate * (sound_latency + 0.2));
if (portaudio_error(Pa_StartStream(*audio_stream),
"could not start audio")) {
return NIL;
}
return play;
}
开发者ID:LBoggino，项目名称:audacity，代码行数:51，代码来源:sndwritepa.c
示例18: play
// play a module using portaudio.
void play(DUH *duh) {
// init portaudio, redirecting stderr output temporarily; a lot of junk
// gets printed otherwise. this won't work on windows, but who cares?
int old_stderr = dup(2);
int new_stderr = open("/dev/null", O_WRONLY);
dup2(new_stderr, 2);
PaError err = Pa_Initialize();
close(new_stderr);
dup2(old_stderr, 2);
close(old_stderr);
if (err != paNoError)
die("could not init PortAudio: %s\n", Pa_GetErrorText(err));
atexit(&pa_terminate);
// get default device info
PaDeviceIndex index = Pa_GetDefaultOutputDevice();
if (index == paNoDevice)
die("could not get default output device\n");
callback_data cd;
const PaDeviceInfo *dev = Pa_GetDeviceInfo(index);
cd.sample_rate = dev->defaultSampleRate;
cd.delta = 65536.0f / cd.sample_rate;
// open and start output stream
PaStream *stream;
cd.sr = duh_start_sigrenderer(duh, 0, channels, 0);
err = Pa_OpenDefaultStream(&stream, 0, channels, paInt16,
dev->defaultSampleRate, paFramesPerBufferUnspecified,
callback, &cd);
if (err != paNoError) {
duh_end_sigrenderer(cd.sr);
unload_duh(duh);
die("could not open default stream: %s\n",
Pa_GetErrorText(err));
}
if ((err = Pa_StartStream(stream)) != paNoError) {
duh_end_sigrenderer(cd.sr);
unload_duh(duh);
die("could not start stream: %s\n", Pa_GetErrorText(err));
}
init_sigrenderer(cd.sr);
// play
while (Pa_IsStreamActive(stream) == 1)
Pa_Sleep(100);
// clean up
Pa_CloseStream(stream);
duh_end_sigrenderer(cd.sr);
}
开发者ID:jangler，项目名称:modplay，代码行数:52，代码来源:modplay.c
示例19: DoTest
static PaError DoTest( int flags )
{
PaStream *stream;
PaError err = paNoError;
paTestData data;
PaStreamParameters outputParameters;
InitializeTestData( &data );
outputParameters.device = Pa_GetDefaultOutputDevice();
if (outputParameters.device == paNoDevice) {
fprintf(stderr,"Error: No default output device.\n");
goto error;
}
outputParameters.channelCount = 2;
outputParameters.hostApiSpecificStreamInfo = NULL;
outputParameters.sampleFormat = paFloat32;
outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency;
/* Open an audio I/O stream. */
err = Pa_OpenStream(
&stream,
NULL, /* no input */
&outputParameters,
SAMPLE_RATE,
FRAMES_PER_BUFFER, /* frames per buffer */
paClipOff | flags, /* 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("hear \"BEEP\"\n" );
fflush(stdout);
while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(SLEEP_MSEC);
if( err < 0 ) goto error;
err = Pa_StopStream( stream );
if( err != paNoError ) goto error;
err = Pa_CloseStream( stream );
if( err != paNoError ) goto error;
return err;
error:
return err;
}
开发者ID:AFilli，项目名称:Second-Law，代码行数:51，代码来源:patest_prime.c
示例20: Pa_GetDeviceCount
void PortAudioHelper::loadDevices() {
DEVICE_COUNT = Pa_GetDeviceCount();
DEFAULT_INPUT_DEVICE = Pa_GetDefaultInputDevice();
DEFAULT_OUTPUT_DEVICE = Pa_GetDefaultOutputDevice();
for (PaDeviceIndex i=0; i<DEVICE_COUNT; i++) {
AudioDeviceInfo deviceInfo;
deviceInfo.deviceInfo = *Pa_GetDeviceInfo(i);
deviceInfo.supportedSampleRates = getSupportedSampleRate(i);
DEVICES.append(deviceInfo);
}
CURRENT_INPUT_DEVICE = loadFromSettings(keyDefaultInputDevice, DEFAULT_INPUT_DEVICE).toInt();
CURRENT_OUTPUT_DEVICE = loadFromSettings(keyDefaultOutputDevice, DEFAULT_OUTPUT_DEVICE).toInt();
}
开发者ID:mohabouje，项目名称:phonospeechstudio，代码行数:14，代码来源:portaudiohelper.cpp
注：本文中的Pa_GetDefaultOutputDevice函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。 |
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