mirror of
https://github.com/cookiengineer/audacity
synced 2025-04-30 15:49:41 +02:00
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
#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 *input, void *output,
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unsigned long frameCount,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags, void *userData)
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{
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return 0;
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}
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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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int recDeviceNum;
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int playDeviceNum;
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int inputChannels = 2;
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recDeviceNum = Pa_GetDefaultInputDevice();
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playDeviceNum = Pa_GetDefaultOutputDevice();
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inputParameters.device = recDeviceNum;
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inputParameters.channelCount = inputChannels;
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inputParameters.sampleFormat = paFloat32;
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inputParameters.suggestedLatency = 0;
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inputParameters.hostApiSpecificStreamInfo = NULL;
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outputParameters.device = paNoDevice;
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outputParameters.channelCount = 0;
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outputParameters.sampleFormat = paFloat32;
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outputParameters.suggestedLatency = 0;
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outputParameters.hostApiSpecificStreamInfo = NULL;
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error = Pa_OpenStream(&stream, &inputParameters, &outputParameters, 44101,
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512, paClipOff | paDitherOff, DummyCallbackFunc, NULL);
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if (error) {
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printf("PortAudio error %d: %s\n", error,
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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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