C++ (Cpp) snd_mixer_selem_set_capture_switch示例

示例#1

文件： gtkalsamixer.c 项目： wuruxu/golc

static int alsa_mixer_set_muted(snd_mixer_elem_t *elem, gboolean muted) {
  long val, min, max;

  /**if switch is available, get switch status directly*/
  if(snd_mixer_selem_has_playback_switch(elem)) {
    snd_mixer_selem_set_playback_switch(elem, 0, !muted);
    snd_mixer_selem_set_playback_switch(elem, 1, !muted);
    return 0;
  } else if(snd_mixer_selem_has_capture_switch(elem)) {
    snd_mixer_selem_set_capture_switch(elem, 0, !muted);
    snd_mixer_selem_set_capture_switch(elem, 1, !muted);
    return 0;
  }

  if(snd_mixer_selem_has_playback_volume(elem)) {
    snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
    val = muted ? min : max;
    snd_mixer_selem_set_playback_volume(elem, 0, val);
    snd_mixer_selem_set_playback_volume(elem, 1, val);
    return 0;
  } else if(snd_mixer_selem_has_capture_volume(elem)) {
    snd_mixer_selem_get_capture_volume_range(elem, &min, &max);
    val = muted ? min : max;
    snd_mixer_selem_set_capture_volume(elem, 0, val);
    snd_mixer_selem_set_capture_volume(elem, 1, val);
    return 0;
  }

  return -1;
}

示例#2

文件： mixer.c 项目： pzanoni/tray

static void _set_switch(snd_mixer_elem_t *elem, int playback, int n, int val)
{
	if (playback)
		snd_mixer_selem_set_playback_switch(elem, n, val);
	else
		snd_mixer_selem_set_capture_switch(elem, n, !val);
}

示例#3

/*
 * Class:     org_tritonus_lowlevel_alsa_AlsaMixerElement
 * Method:    setCaptureSwitch
 * Signature: (IZ)V
 */
JNIEXPORT void JNICALL
Java_org_tritonus_lowlevel_alsa_AlsaMixerElement_setCaptureSwitch
(JNIEnv* env, jobject obj, jint nChannelType, jboolean bValue)
{
    snd_mixer_elem_t*	handle;
    int			nReturn;

    if (debug_flag) {
        (void) fprintf(debug_file, "Java_org_tritonus_lowlevel_alsa_AlsaMixerElement_setCaptureSwitch(): begin\n");
    }
    handle = getHandle(env, obj);
    nReturn = snd_mixer_selem_set_capture_switch(handle, (snd_mixer_selem_channel_id_t) nChannelType, bValue);
    if (nReturn < 0)
    {
        throwRuntimeException(env, snd_strerror(nReturn));
    }
    if (debug_flag) {
        (void) fprintf(debug_file, "Java_org_tritonus_lowlevel_alsa_AlsaMixerElement_setCaptureSwitch(): end\n");
    }
}

示例#4

文件： sound.c 项目： daneshih1125/sound

/* mute: 0 -> mute,  1 -> unmute */
void sound_mixer_mute(const char *mixer, MUTEST mute)
{
	int i;
	snd_mixer_t *handle = NULL;
	snd_mixer_elem_t *elem = NULL;

	elem = sound_get_elem(mixer, &handle);
	if (!elem)
		return;

	for (i = 0; i <= SND_MIXER_SCHN_LAST; i++) {
		if (snd_mixer_selem_has_playback_channel(elem, i) &&
				snd_mixer_selem_has_playback_switch(elem))
			snd_mixer_selem_set_playback_switch(elem, i, mute);
		else if (snd_mixer_selem_has_capture_channel(elem, i) &&
				snd_mixer_selem_has_capture_switch(elem))
			snd_mixer_selem_set_capture_switch(elem, i, mute);
	}
	snd_mixer_close(handle);
}

示例#5

文件： AlsaMixer.cpp 项目： Schiiiiins/lcu1

bool AlsaMixer::SwitchChannel( const char* channel, bool value )
{
	bool success = false;
	snd_mixer_elem_t *elem;
	snd_mixer_selem_id_t *sid;
	snd_mixer_selem_id_alloca(&sid);

	snd_mixer_selem_id_set_index( sid, 0);
	snd_mixer_selem_id_set_name( sid, channel);
	elem = snd_mixer_find_selem(_handle, sid);
	if (!elem) {
		LOG( Logger::LOG_ERROR, "Unable to find simple control '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
		goto end;
	}

	if( snd_mixer_selem_has_playback_switch(elem) )
	{
		for (int chn = 0; chn <= SND_MIXER_SCHN_LAST; chn++) {
			if (snd_mixer_selem_set_playback_switch(elem, (snd_mixer_selem_channel_id_t)chn, value ? 1 : 0 ) >= 0)
			{
				success = true;
			}
		}
	}else if( snd_mixer_selem_has_capture_switch(elem) )
	{
		for (int chn = 0; chn <= SND_MIXER_SCHN_LAST; chn++) {
			if (snd_mixer_selem_set_capture_switch(elem, (snd_mixer_selem_channel_id_t)chn, value ? 1 : 0 ) >= 0)
			{
				success = true;
			}
		}
	}
	if( !success )
	{
		LOG( Logger::LOG_ERROR, "Error setting control '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
	}
 end:
	return success;
}

示例#6

文件： px_linux_alsa.c 项目： andreipaga/audacity

static void set_current_input_source(px_mixer *Px, int i)
{
   PxInfo *info = (PxInfo *)Px->info;
   snd_mixer_elem_t *elem;
   int j;

   if (!info->capture.handle) {
      return;
   }

   if (i < 0 || i >= info->capture.numselems) {
      return;
   }

   elem = info->capture.selems[i].elem;
   for (j = 0; j <= SND_MIXER_SCHN_LAST; j++) {
      if (snd_mixer_selem_has_capture_switch(elem)) {
         snd_mixer_selem_set_capture_switch(elem, j, TRUE);
      }
   }

   return;
}