gistfile1.txt

#include <portaudio.h>
#include <stdio.h>
#include <rsound.h>
#include <assert.h>
#include <signal.h>

static volatile sig_atomic_t g_alive;
static void sighandler(int sig)
{
   (void)sig;
   g_alive = 0;
}

#define FRAMES 1024

int main(void)
{
   signal(SIGINT, sighandler);
   signal(SIGTERM, sighandler);
   signal(SIGPIPE, sighandler);

   Pa_Initialize();

   PaDeviceIndex index = Pa_GetDefaultInputDevice();
   const PaDeviceInfo *info = Pa_GetDeviceInfo(index);
   PaStreamParameters params = {
      .device = index,
      .channelCount = 2,
      .sampleFormat = paInt16,
      .suggestedLatency = info->defaultLowInputLatency,
   };

   PaStream *stream;
   assert(Pa_OpenStream(&stream, &params, NULL, info->defaultSampleRate, FRAMES, 0, NULL, NULL) == paNoError);

   assert(Pa_StartStream(stream) == paNoError);

   rsound_t *rd;
   rsd_init(&rd);

   int rate = info->defaultSampleRate;
   rsd_set_param(rd, RSD_SAMPLERATE, &rate);

   int channels = 2;
   rsd_set_param(rd, RSD_CHANNELS, &channels);

   int format = RSD_S16_NE;
   rsd_set_param(rd, RSD_FORMAT, &format);

   assert(rsd_start(rd) == 0);

   g_alive = 1;

   fprintf(stderr, "=== Starting capture ===\n");
   while (g_alive)
   {
      int16_t buf[FRAMES * 2];
      Pa_ReadStream(stream, buf, FRAMES);
      rsd_write(rd, buf, sizeof(buf));
   }
   fprintf(stderr, "=== End capture ===\n");

   rsd_stop(rd);
   rsd_free(rd);
   
   Pa_CloseStream(stream);
   Pa_Terminate();
   return 0;
}