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kaklik |
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#include <stdio.h>
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#include <stdlib.h>
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#include <alsa/asoundlib.h>
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int rate = 44100;
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int exact_rate;
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main (int argc, char *argv[])
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{
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int i;
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int err;
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short buf[128];
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snd_pcm_t *capture_handle;
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snd_pcm_hw_params_t *hw_params;
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if ((err = snd_pcm_open (&capture_handle, argv[1], SND_PCM_STREAM_CAPTURE, 0)) < 0) {
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fprintf (stderr, "cannot open audio device %s (%s)\n",
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argv[1],
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snd_strerror (err));
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exit (1);
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}
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if ((err = snd_pcm_hw_params_malloc (&hw_params)) < 0) {
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fprintf (stderr, "cannot allocate hardware parameter structure (%s)\n",
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snd_strerror (err));
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exit (1);
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}
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if ((err = snd_pcm_hw_params_any (capture_handle, hw_params)) < 0) {
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fprintf (stderr, "cannot initialize hardware parameter structure (%s)\n",
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snd_strerror (err));
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exit (1);
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}
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if ((err = snd_pcm_hw_params_set_access (capture_handle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
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fprintf (stderr, "cannot set access type (%s)\n",
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snd_strerror (err));
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exit (1);
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}
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if ((err = snd_pcm_hw_params_set_format (capture_handle, hw_params, SND_PCM_FORMAT_S16_LE)) < 0) {
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fprintf (stderr, "cannot set sample format (%s)\n",
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snd_strerror (err));
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exit (1);
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}
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exact_rate = rate;
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if ((err = snd_pcm_hw_params_set_rate_near (capture_handle, hw_params, &exact_rate, 0)) < 0) {
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fprintf (stderr, "cannot set sample rate (%s)\n",
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snd_strerror (err));
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exit (1);
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}
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if ((err = snd_pcm_hw_params_set_channels (capture_handle, hw_params, 2)) < 0) {
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fprintf (stderr, "cannot set channel count (%s)\n",
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snd_strerror (err));
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exit (1);
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}
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if ((err = snd_pcm_hw_params (capture_handle, hw_params)) < 0) {
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fprintf (stderr, "cannot set parameters (%s)\n",
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snd_strerror (err));
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exit (1);
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}
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snd_pcm_hw_params_free (hw_params);
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if ((err = snd_pcm_prepare (capture_handle)) < 0) {
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fprintf (stderr, "cannot prepare audio interface for use (%s)\n",
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snd_strerror (err));
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exit (1);
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}
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for (i = 0; i < 10; ++i) {
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if ((err = snd_pcm_readi (capture_handle, buf, 128)) != 128) {
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fprintf (stderr, "read from audio interface failed (%s)\n",
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snd_strerror (err));
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exit (1);
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}
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| 517 |
kaklik |
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/*if ((err = snd_pcm_writei (capture_handle, buf, 128)) != 128) {
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kaklik |
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fprintf (stderr, "write to audio interface failed (%s)\n",
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snd_strerror (err));
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exit (1);
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kaklik |
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}*/
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| 516 |
kaklik |
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}
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snd_pcm_close (capture_handle);
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exit (0);
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}
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