Re: Alsa Programming Examples

[vollmer.philipp@t-online.de (Philipp Vollmer)]

[-- Attachment #1: Type: text/plain, Size: 251 bytes --]

> it seems params == 0 when you're calling snd_pcm_hw_refine.
Hello,

Sorry but there is no codeline like snd_pcm_hw_refine in the example.
I will send you the file as an attachment.

Best regards 

Philipp Vollmer
vollmer.philipp@t-online.de

[-- Attachment #2: how1.c --]
[-- Type: text/x-csrc, Size: 1503 bytes --]

      #include <stdlib.h>
      #include <alsa/asoundlib.h>
      
      main (int argc, char *argv[])
      {
           int i;
           char buf[4096];
           snd_pcm_t *playback_handle;
           snd_pcm_hw_params_t *hw_params;

           if ((playback_handle = snd_pcm_open (&playback_handle, "default", SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
                 fprintf (stderr, "cannot open audio device %s\n", argv[1]);
                 exit (1);
           }
	   // snd_pcm_open (&playback_handle, pcm_name, SND_PCM_STREAM_PLAYBACK, 0)
           
           snd_pcm_hw_params_malloc (&hw_params);
           snd_pcm_hw_params_any (playback_handle, hw_params);
           snd_pcm_hw_params_set_access (playback_handle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
           snd_pcm_hw_params_set_format (playback_handle, hw_params, SND_PCM_FORMAT_S16_LE);
           snd_pcm_hw_params_set_rate_near (playback_handle, hw_params, 44100, 0);
	 //snd_pcm_hw_params_set_rate_near(playback_handle, hw_params, 44100, 0);
           snd_pcm_hw_params_set_channels (playback_handle, hw_params, 2);
           snd_pcm_hw_params (playback_handle, hw_params);
           snd_pcm_hw_params_free (hw_params);

           snd_pcm_prepare (playback_handle);

           for (i = 0; i < 10; ++i) {
                   snd_pcm_writei (playback_handle, buf, sizeof (buf));
		  //snd_pcm_writei (playback_handle, buf, nframes);
           }

           snd_pcm_close (playback_handle);
           exit (0);
     }