104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
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#include <stdio.h>
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#include "portmixer.h"
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#include "portaudio.h"
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static int DummyCallbackFunc(const void *inputBuffer,
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void *outputBuffer,
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags,
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void *userData )
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{
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return 0;
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}
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#define NUM_CHANNELS (2)
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#define PA_SAMPLE_TYPE paFloat32
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#define SAMPLE_RATE (44100)
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#define FRAMES_PER_BUFFER (1024)
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int main(int argc, char **argv)
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{
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int num_mixers;
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int i;
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PaError error;
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PaStream* stream;
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PaStreamParameters inputParameters;
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PaStreamParameters outputParameters;
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error = Pa_Initialize();
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if ( error != paNoError ) {
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printf("PortAudio error %d: %s\n", error, Pa_GetErrorText(error));
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return -1;
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}
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inputParameters.device = Pa_GetDefaultInputDevice();
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inputParameters.channelCount = NUM_CHANNELS;
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inputParameters.sampleFormat = PA_SAMPLE_TYPE;
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inputParameters.suggestedLatency =
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Pa_GetDeviceInfo(inputParameters.device )->defaultLowInputLatency;
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inputParameters.hostApiSpecificStreamInfo = NULL;
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outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
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outputParameters.channelCount = 2; /* stereo output */
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outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */
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outputParameters.suggestedLatency =
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Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
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outputParameters.hostApiSpecificStreamInfo = NULL;
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error = Pa_OpenStream(&stream, &inputParameters, &outputParameters,
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SAMPLE_RATE,FRAMES_PER_BUFFER,
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paClipOff | paDitherOff,
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DummyCallbackFunc, NULL);
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if (error) {
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printf("PortAudio error %d: %s\n", error, Pa_GetErrorText(error));
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return -1;
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}
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num_mixers = Px_GetNumMixers(stream);
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printf("Number of mixers: %d\n", num_mixers);
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for(i=0; i<num_mixers; i++) {
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PxMixer *mixer;
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int num;
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int j;
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printf("Mixer %d: %s\n", i, Px_GetMixerName(stream, i));
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mixer = Px_OpenMixer(stream, i);
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if (!mixer) {
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printf(" Could not open mixer!\n");
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continue;
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}
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printf(" Master volume: %.2f\n", Px_GetMasterVolume(mixer));
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printf(" PCM output volume: %.2f\n", Px_GetPCMOutputVolume(mixer));
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num = Px_GetNumOutputVolumes(mixer);
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printf(" Num outputs: %d\n", num);
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for(j=0; j<num; j++) {
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printf(" Output %d (%s): %.2f\n",
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j,
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Px_GetOutputVolumeName(mixer, j),
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Px_GetOutputVolume(mixer, j));
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}
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num = Px_GetNumInputSources(mixer);
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printf(" Num input sources: %d\n", num);
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for(j=0; j<num; j++) {
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printf(" Input %d (%s) %s\n",
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j,
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Px_GetInputSourceName(mixer, j),
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(Px_GetCurrentInputSource(mixer)==j?
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"SELECTED": ""));
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}
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printf(" Input volume: %.2f\n", Px_GetInputVolume(mixer));
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Px_CloseMixer(mixer);
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}
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Pa_CloseStream(stream);
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return 0;
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}
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