예제 #1
0
/**
 * \brief Load an HCTL with all elements and sort them
 * \param hctl HCTL handle
 * \return 0 on success otherwise a negative error code
 */
int snd_hctl_load(snd_hctl_t *hctl)
{
	snd_ctl_elem_list_t list;
	int err = 0;
	unsigned int idx;

	assert(hctl);
	assert(hctl->ctl);
	assert(hctl->count == 0);
	assert(list_empty(&hctl->elems));
	memset(&list, 0, sizeof(list));
	if ((err = snd_ctl_elem_list(hctl->ctl, &list)) < 0)
		goto _end;
	while (list.count != list.used) {
		err = snd_ctl_elem_list_alloc_space(&list, list.count);
		if (err < 0)
			goto _end;
		if ((err = snd_ctl_elem_list(hctl->ctl, &list)) < 0)
			goto _end;
	}
	if (hctl->alloc < list.count) {
		hctl->alloc = list.count;
		free(hctl->pelems);
		hctl->pelems = malloc(hctl->alloc * sizeof(*hctl->pelems));
		if (!hctl->pelems) {
			err = -ENOMEM;
			goto _end;
		}
	}
	for (idx = 0; idx < list.count; idx++) {
		snd_hctl_elem_t *elem;
		elem = calloc(1, sizeof(snd_hctl_elem_t));
		if (elem == NULL) {
			snd_hctl_free(hctl);
			err = -ENOMEM;
			goto _end;
		}
		elem->id = list.pids[idx];
		elem->hctl = hctl;
		elem->compare_weight = get_compare_weight(&elem->id);
		hctl->pelems[idx] = elem;
		list_add_tail(&elem->list, &hctl->elems);
		hctl->count++;
	}
	if (!hctl->compare)
		hctl->compare = snd_hctl_compare_default;
	snd_hctl_sort(hctl);
	for (idx = 0; idx < hctl->count; idx++) {
		int res = snd_hctl_throw_event(hctl, SNDRV_CTL_EVENT_MASK_ADD,
					       hctl->pelems[idx]);
		if (res < 0)
			return res;
	}
	err = snd_ctl_subscribe_events(hctl->ctl, 1);
 _end:
	free(list.pids);
	return err;
}
예제 #2
0
static int get_controls(int cardno, snd_config_t *top)
{
	snd_ctl_t *handle;
	snd_ctl_card_info_t *info;
	snd_config_t *state, *card, *control;
	snd_ctl_elem_list_t *list;
	unsigned int idx;
	int err;
	char name[32];
	unsigned int count;
	const char *id;
	snd_ctl_card_info_alloca(&info);
	snd_ctl_elem_list_alloca(&list);

	sprintf(name, "hw:%d", cardno);
	err = snd_ctl_open(&handle, name, SND_CTL_READONLY);
	if (err < 0) {
		error("snd_ctl_open error: %s", snd_strerror(err));
		return err;
	}
	err = snd_ctl_card_info(handle, info);
	if (err < 0) {
		error("snd_ctl_card_info error: %s", snd_strerror(err));
		goto _close;
	}
	id = snd_ctl_card_info_get_id(info);
	err = snd_config_search(top, "state", &state);
	if (err == 0 &&
	    snd_config_get_type(state) != SND_CONFIG_TYPE_COMPOUND) {
		error("config state node is not a compound");
		err = -EINVAL;
		goto _close;
	}
	if (err < 0) {
		err = snd_config_compound_add(top, "state", 1, &state);
		if (err < 0) {
			error("snd_config_compound_add: %s", snd_strerror(err));
			goto _close;
		}
	}
	err = snd_config_search(state, id, &card);
	if (err == 0 &&
	    snd_config_get_type(card) != SND_CONFIG_TYPE_COMPOUND) {
		error("config state.%s node is not a compound", id);
		err = -EINVAL;
		goto _close;
	}
	if (err < 0) {
		err = snd_config_compound_add(state, id, 0, &card);
		if (err < 0) {
			error("snd_config_compound_add: %s", snd_strerror(err));
			goto _close;
		}
	}
	err = snd_config_search(card, "control", &control);
	if (err == 0) {
		err = snd_config_delete(control);
		if (err < 0) {
			error("snd_config_delete: %s", snd_strerror(err));
			goto _close;
		}
	}
	err = snd_ctl_elem_list(handle, list);
	if (err < 0) {
		error("Cannot determine controls: %s", snd_strerror(err));
		goto _close;
	}
	count = snd_ctl_elem_list_get_count(list);
	err = snd_config_compound_add(card, "control", count > 0, &control);
	if (err < 0) {
		error("snd_config_compound_add: %s", snd_strerror(err));
		goto _close;
	}
	if (count == 0) {
		err = 0;
		goto _close;
	}
	snd_ctl_elem_list_set_offset(list, 0);
	if (snd_ctl_elem_list_alloc_space(list, count) < 0) {
		error("No enough memory...");
		goto _close;
	}
	if ((err = snd_ctl_elem_list(handle, list)) < 0) {
		error("Cannot determine controls (2): %s", snd_strerror(err));
		goto _free;
	}
	for (idx = 0; idx < count; ++idx) {
		snd_ctl_elem_id_t *id;
		snd_ctl_elem_id_alloca(&id);
		snd_ctl_elem_list_get_id(list, idx, id);
		err = get_control(handle, id, control);
		if (err < 0)
			goto _free;
	}		
		
	err = 0;
 _free:
	snd_ctl_elem_list_free_space(list);
 _close:
	snd_ctl_close(handle);
	return err;
}
예제 #3
0
static int check_audio_route()
{
	int err, idx, i;
	snd_ctl_t *handle;
	const char *route_ctrl_name = "Speaker Function";
	snd_ctl_elem_value_t * elem_value;
	snd_ctl_elem_info_t *info;

	snd_ctl_elem_list_t elist;
	snd_ctl_elem_id_t *eid;

	snd_ctl_elem_value_alloca(&elem_value);
	snd_ctl_elem_info_alloca(&info);
	//snd_ctl_elem_value_set_numid(elem_value, 54);

	if ((err = snd_ctl_open(&handle, "hw:0", 0)) < 0) {
		  db_msg("Open control error: %s\n", snd_strerror(err));
		  goto check_audio_route_err;
	}

	db_msg("card=%d\n", handle->card);

	memset(&elist, 0, sizeof(elist));
	if (snd_ctl_elem_list(handle, &elist) < 0) {
		db_msg("snd_ctl_elem_list 1 failed\n");
		goto check_audio_route_err;
	}

	eid = calloc(elist.count, sizeof(snd_ctl_elem_id_t));
	elist.space = elist.count;
	elist.pids = eid;
	if (snd_ctl_elem_list(handle, &elist) < 0) {
		db_msg("snd_ctl_elem_list 2 failed\n");
		goto check_audio_route_err;
	}

	for (i = 0; i < elist.count; ++i) {
		info->id.numid = eid[i].numid;
		if ((err = snd_ctl_elem_info(handle, info)) < 0) {
			db_msg("Cannot find the given element from control\n");
			goto check_audio_route_err;
		}
		//db_msg("name[%d]=%s\n", i, snd_ctl_elem_info_get_name(info));

		if (!strcmp(snd_ctl_elem_info_get_name(info), route_ctrl_name)) {
			db_msg("route ctrl found!!!\n");
			break;
		}
	}

	snd_ctl_elem_value_set_numid(elem_value, info->id.numid);
	if ((err = snd_ctl_elem_read(handle,elem_value)) < 0) {
		  db_msg("snd_ctl_elem_read error: %s\n", snd_strerror(err));
		  goto check_audio_route_err;
	}

	db_msg("numid=%d\n", snd_ctl_elem_value_get_numid(elem_value));
	db_msg("name=%s\n", snd_ctl_elem_value_get_name(elem_value));

	//to set the new value
	snd_ctl_elem_value_set_enumerated(elem_value,0, 1);
	if ((err = snd_ctl_elem_write(handle,elem_value)) < 0) {
		  db_msg("snd_ctl_elem_write error: %s\n", snd_strerror(err));
		  goto check_audio_route_err;
	}

	//read it out again to check if we did set the registers.
	if ((err = snd_ctl_elem_read(handle,elem_value)) < 0) {
		  db_msg("snd_ctl_elem_read error: %s\n", snd_strerror(err));
		  goto check_audio_route_err;
	}

	db_msg("after: %d\n", snd_ctl_elem_value_get_enumerated(elem_value, 0));

	snd_ctl_close(handle);
	return 0;

check_audio_route_err:
	snd_ctl_close(handle);
	return -1;
}
예제 #4
0
/* Try and find an IEC958 PCM device and mixer on card 0 and open it
 * This function is only used on older ALSA installs that don't have the
 * correct iec958 alias stuff set up, and relies on there being only
 * one IEC958 PCM device (relies IEC958 in the device name) and one IEC958
 * mixer control for doing the settings.
 */
static int
alsaspdifsink_find_pcm_device (AlsaSPDIFSink * sink)
{
  int err = -1, dev, idx, count;
  const gchar *ctl_name = "hw:0";
  const gchar *spdif_name = SND_CTL_NAME_IEC958 ("", PLAYBACK, NONE);
  int card = sink->card;
  gchar pcm_name[24];
  snd_pcm_t *pcm = NULL;
  snd_ctl_t *ctl = NULL;
  snd_ctl_card_info_t *info = NULL;
  snd_ctl_elem_list_t *clist = NULL;
  snd_ctl_elem_id_t *cid = NULL;
  snd_pcm_info_t *pinfo = NULL;

  GST_WARNING ("Opening IEC958 named device failed. Trying to autodetect");

  if ((err = snd_ctl_open (&ctl, ctl_name, card)) < 0)
    return err;

  snd_ctl_card_info_malloc (&info);
  snd_pcm_info_malloc (&pinfo);

  /* Find a mixer for IEC958 settings */
  snd_ctl_elem_list_malloc (&clist);
  if ((err = snd_ctl_elem_list (ctl, clist)) < 0)
    goto beach;

  if ((err =
          snd_ctl_elem_list_alloc_space (clist,
              snd_ctl_elem_list_get_count (clist))) < 0)
    goto beach;
  if ((err = snd_ctl_elem_list (ctl, clist)) < 0)
    goto beach;

  count = snd_ctl_elem_list_get_used (clist);
  for (idx = 0; idx < count; idx++) {
    if (strstr (snd_ctl_elem_list_get_name (clist, idx), spdif_name) != NULL)
      break;
  }
  if (idx == count) {
    /* No SPDIF mixer availble */
    err = 0;
    goto beach;
  }
  snd_ctl_elem_id_malloc (&cid);
  snd_ctl_elem_list_get_id (clist, idx, cid);

  /* Now find a PCM device for IEC 958 */
  if ((err = snd_ctl_card_info (ctl, info)) < 0)
    goto beach;
  dev = -1;
  do {
    if (snd_ctl_pcm_next_device (ctl, &dev) < 0)
      goto beach;
    if (dev < 0)
      break;                    /* No more devices */

    /* Filter for playback devices */
    snd_pcm_info_set_device (pinfo, dev);
    snd_pcm_info_set_subdevice (pinfo, 0);
    snd_pcm_info_set_stream (pinfo, SND_PCM_STREAM_PLAYBACK);
    if ((err = snd_ctl_pcm_info (ctl, pinfo)) < 0) {
      if (err != -ENOENT)
        goto beach;             /* Genuine error */

      /* Device has no playback streams */
      continue;
    }
    if (strstr (snd_pcm_info_get_name (pinfo), "IEC958") == NULL)
      continue;                 /* Not the device we are looking for */

    count = snd_pcm_info_get_subdevices_count (pinfo);
    GST_LOG_OBJECT (sink, "Device %d has %d subdevices\n", dev,
        snd_pcm_info_get_subdevices_count (pinfo));
    for (idx = 0; idx < count; idx++) {
      snd_pcm_info_set_subdevice (pinfo, idx);

      if ((err = snd_ctl_pcm_info (ctl, pinfo)) < 0)
        goto beach;

      g_assert (snd_pcm_info_get_stream (pinfo) == SND_PCM_STREAM_PLAYBACK);

      GST_LOG_OBJECT (sink, "Found playback stream on dev %d sub-d %d\n", dev,
          idx);

      /* Found a suitable PCM device, let's open it */
      g_snprintf (pcm_name, 24, "hw:%d,%d", card, dev);
      if ((err =
              snd_pcm_open (&(pcm), pcm_name, SND_PCM_STREAM_PLAYBACK, 0)) < 0)
        goto beach;

      break;
    }
  } while (pcm == NULL);

  if (pcm != NULL) {
    snd_ctl_elem_value_t *cval;
    snd_aes_iec958_t iec958;

    /* Have a PCM device and a mixer, set things up */
    snd_ctl_elem_value_malloc (&cval);
    snd_ctl_elem_value_set_id (cval, cid);
    snd_ctl_elem_value_get_iec958 (cval, &iec958);
    iec958.status[0] = IEC958_AES0_NONAUDIO;
    iec958.status[1] = IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER;
    iec958.status[2] = 0;
    iec958.status[3] = IEC958_AES3_CON_FS_48000;
    snd_ctl_elem_value_set_iec958 (cval, &iec958);
    snd_ctl_elem_value_free (cval);

    sink->pcm = pcm;
    pcm = NULL;
    err = 0;
  }

beach:
  if (pcm)
    snd_pcm_close (pcm);
  if (clist)
    snd_ctl_elem_list_clear (clist);
  if (ctl)
    snd_ctl_close (ctl);
  if (clist)
    snd_ctl_elem_list_free (clist);
  if (cid)
    snd_ctl_elem_id_free (cid);
  if (info)
    snd_ctl_card_info_free (info);
  if (pinfo)
    snd_pcm_info_free (pinfo);
  return err;
}