C++ pa_context_new函数代码示例

static void
moko_notify_init (MokoNotify *notify)
{
  MokoNotifyPrivate *priv;
  pa_threaded_mainloop *mainloop = NULL;
  pa_mainloop_api *mapi = NULL;

  priv = notify->priv = MOKO_NOTIFY_GET_PRIVATE (notify);

  priv->started = 0;
  priv->pac = NULL;

  /* Start up pulse audio */
  mainloop = pa_threaded_mainloop_new ();
  if (!mainloop)
  {
    g_warning ("Unable to create PulseAudio mainloop.");
    return;
  }
  mapi = pa_threaded_mainloop_get_api (mainloop);
  priv->pac = pa_context_new (mapi, "Openmoko Dialer");
  if (!priv->pac)
  {
    g_warning ("Could create the PulseAudio context");
    return;
  }
  pa_context_connect (priv->pac, NULL, 0, NULL);
  pa_threaded_mainloop_start (mainloop);
}

/**
 * This function does the context initialization.
 */
static gboolean
xvd_connect_to_pulse (XvdInstance *i)
{
  pa_context_flags_t flags = PA_CONTEXT_NOFAIL;

  if (i->pulse_context)
    {
      pa_context_unref (i->pulse_context);
      i->pulse_context = NULL;
    }

  i->pulse_context = pa_context_new (pa_glib_mainloop_get_api (i->pa_main_loop),
                                     XVD_APPNAME);
  g_assert(i->pulse_context);
  pa_context_set_state_callback (i->pulse_context,
                                 xvd_context_state_callback,
                                 i);

  if (pa_context_connect (i->pulse_context,
                          NULL,
                          flags,
                          NULL) < 0)
    {
      g_warning ("xvd_connect_to_pulse: failed to connect context: %s",
                 pa_strerror (pa_context_errno (i->pulse_context)));
      return FALSE;
    }
  return TRUE;
}

static int
tsmf_pulse_open(ITSMFAudioDevice * audio, const char * device)
{
	TSMFPulseAudioDevice * pulse = (TSMFPulseAudioDevice *) audio;

	if (device)
	{
		strcpy(pulse->device, device);
	}

	pulse->mainloop = pa_threaded_mainloop_new();
	if (!pulse->mainloop)
	{
		LLOGLN(0, ("tsmf_pulse_open: pa_threaded_mainloop_new failed"));
		return 1;
	}
	pulse->context = pa_context_new(pa_threaded_mainloop_get_api(pulse->mainloop), "freerdp");
	if (!pulse->context)
	{
		LLOGLN(0, ("tsmf_pulse_open: pa_context_new failed"));
		return 1;
	}
	pa_context_set_state_callback(pulse->context, tsmf_pulse_context_state_callback, pulse);
	if (tsmf_pulse_connect(pulse))
	{
		LLOGLN(0, ("tsmf_pulse_open: tsmf_pulse_connect failed"));
		return 1;
	}

	LLOGLN(0, ("tsmf_pulse_open: open device %s", pulse->device));
	return 0;
}

/**
 * Create, set up and connect a context.
 *
 * Caller must lock the main loop.
 *
 * @return true on success, false on error
 */
static bool
pulse_output_setup_context(struct pulse_output *po, GError **error_r)
{
	assert(po != NULL);
	assert(po->mainloop != NULL);

	po->context = pa_context_new(pa_threaded_mainloop_get_api(po->mainloop),
				     MPD_PULSE_NAME);
	if (po->context == NULL) {
		g_set_error(error_r, pulse_output_quark(), 0,
			    "pa_context_new() has failed");
		return false;
	}

	pa_context_set_state_callback(po->context,
				      pulse_output_context_state_cb, po);
	pa_context_set_subscribe_callback(po->context,
					  pulse_output_subscribe_cb, po);

	if (!pulse_output_connect(po, error_r)) {
		pulse_output_delete_context(po);
		return false;
	}

	return true;
}

bool PulseDeviceFinder::Reconnect() {
  if (context_) {
    pa_context_disconnect(context_);
    pa_context_unref(context_);
  }

  context_ = pa_context_new(pa_mainloop_get_api(mainloop_),
                            "Clementine device finder");
  if (!context_) {
    qLog(Warning) << "Failed to create pulseaudio context";
    return false;
  }

  if (pa_context_connect(context_, nullptr, PA_CONTEXT_NOFLAGS, nullptr) < 0) {
    qLog(Warning) << "Failed to connect pulseaudio context";
    return false;
  }

  // Wait for the context to be connected.
  forever {
    const pa_context_state state = pa_context_get_state(context_);
    if (state == PA_CONTEXT_FAILED || state == PA_CONTEXT_TERMINATED) {
      qLog(Warning) << "Connection to pulseaudio failed";
      return false;
    }

    if (state == PA_CONTEXT_READY) {
      return true;
    }

    pa_mainloop_iterate(mainloop_, true, nullptr);
  }
}

static BOOL tsmf_pulse_open(ITSMFAudioDevice *audio, const char *device)
{
	TSMFPulseAudioDevice *pulse = (TSMFPulseAudioDevice *) audio;
	if(device)
	{
		strcpy(pulse->device, device);
	}
	pulse->mainloop = pa_threaded_mainloop_new();
	if(!pulse->mainloop)
	{
		DEBUG_WARN("pa_threaded_mainloop_new failed");
		return FALSE;
	}
	pulse->context = pa_context_new(pa_threaded_mainloop_get_api(pulse->mainloop), "freerdp");
	if(!pulse->context)
	{
		DEBUG_WARN("pa_context_new failed");
		return FALSE;
	}
	pa_context_set_state_callback(pulse->context, tsmf_pulse_context_state_callback, pulse);
	if(tsmf_pulse_connect(pulse))
	{
		DEBUG_WARN("tsmf_pulse_connect failed");
		return FALSE;
	}
	DEBUG_TSMF("open device %s", pulse->device);
	return TRUE;
}

void vis::PulseAudioSource::populate_default_source_name()
{
#ifdef _ENABLE_PULSE
    pa_mainloop_api *mainloop_api;
    pa_context *pulseaudio_context;

    // Create a mainloop API and connection to the default server
    m_pulseaudio_mainloop = pa_mainloop_new();

    mainloop_api = pa_mainloop_get_api(m_pulseaudio_mainloop);
    pulseaudio_context = pa_context_new(mainloop_api, "vis device list");

    // This function connects to the pulse server
    pa_context_connect(pulseaudio_context, nullptr, PA_CONTEXT_NOFLAGS,
                       nullptr);

    // This function defines a callback so the server will tell us its state.
    pa_context_set_state_callback(pulseaudio_context,
                                  pulseaudio_context_state_callback,
                                  reinterpret_cast<void *>(this));

    int ret;
    if (pa_mainloop_run(m_pulseaudio_mainloop, &ret) < 0)
    {
        VIS_LOG(vis::LogLevel::ERROR, "Could not open pulseaudio mainloop to "
                                      "find default device name: %d",
                ret);
    }
#endif
}

void guac_pa_start_stream(guac_client* client) {

    vnc_guac_client_data* client_data = (vnc_guac_client_data*) client->data;
    pa_context* context;

    guac_client_log_info(client, "Starting audio stream");
    guac_audio_stream_begin(client_data->audio,
                GUAC_VNC_AUDIO_RATE,
                GUAC_VNC_AUDIO_CHANNELS,
                GUAC_VNC_AUDIO_BPS);

    /* Init main loop */
    client_data->pa_mainloop = pa_threaded_mainloop_new();

    /* Create context */
    context = pa_context_new(
            pa_threaded_mainloop_get_api(client_data->pa_mainloop),
            "Guacamole Audio");

    /* Set up context */
    pa_context_set_state_callback(context, __context_state_callback, client);
    pa_context_connect(context, client_data->pa_servername,
            PA_CONTEXT_NOAUTOSPAWN, NULL);

    /* Start loop */
    pa_threaded_mainloop_start(client_data->pa_mainloop);

}

int PulseAudioDriver::thread_body()
{
	m_main_loop = pa_mainloop_new();
	pa_mainloop_api* api = pa_mainloop_get_api(m_main_loop);
	pa_io_event* ioev = api->io_new(api, m_pipe[0], PA_IO_EVENT_INPUT,
			pipe_callback, this);
	m_ctx = pa_context_new(api, "Hydrogen");
	pa_context_set_state_callback(m_ctx, ctx_state_callback, this);
	pa_context_connect(m_ctx, 0, pa_context_flags_t(0), 0);

	int retval;
	pa_mainloop_run(m_main_loop, &retval);

	if (m_stream)
	{
		pa_stream_set_state_callback(m_stream, 0, 0);
		pa_stream_set_write_callback(m_stream, 0, 0);
		pa_stream_unref(m_stream);
		m_stream = 0;
	}

	api->io_free(ioev);
	pa_context_unref(m_ctx);
	pa_mainloop_free(m_main_loop);

	return retval;
}

int main(int argc, char *argv[]) {

    // Define our pulse audio loop and connection variables
    pa_mainloop *pa_ml;
    pa_mainloop_api *pa_mlapi;
    pa_operation *pa_op;
    pa_time_event *time_event;

    // Create a mainloop API and connection to the default server
    pa_ml = pa_mainloop_new();
    pa_mlapi = pa_mainloop_get_api(pa_ml);
    context = pa_context_new(pa_mlapi, "Device list");

    // This function connects to the pulse server
    pa_context_connect(context, NULL, 0, NULL);

    // This function defines a callback so the server will tell us its state.
    pa_context_set_state_callback(context, context_state_cb, NULL);

    
    if (pa_mainloop_run(pa_ml, &ret) < 0) {
	printf("pa_mainloop_run() failed.");
	exit(1);
    }
}

void Context::connectToDaemon()
{
    Q_ASSERT(m_context == nullptr);

    // We require a glib event loop
    if (!QByteArray(QAbstractEventDispatcher::instance()->metaObject()->className()).contains("EventDispatcherGlib")) {
        qCWarning(PLASMAPA) << "Disabling PulseAudio integration for lack of GLib event loop";
        return;
    }

    qCDebug(PLASMAPA) <<  "Attempting connection to PulseAudio sound daemon";
    if (!m_mainloop) {
        m_mainloop = pa_glib_mainloop_new(nullptr);
        Q_ASSERT(m_mainloop);
    }

    pa_mainloop_api *api = pa_glib_mainloop_get_api(m_mainloop);
    Q_ASSERT(api);
    m_context = pa_context_new(api, "QPulse");
    Q_ASSERT(m_context);

    if (pa_context_connect(m_context, NULL, PA_CONTEXT_NOFAIL, nullptr) < 0) {
        pa_context_unref(m_context);
        pa_glib_mainloop_free(m_mainloop);
        m_context = nullptr;
        m_mainloop = nullptr;
        return;
    }
    pa_context_set_state_callback(m_context, &context_state_callback, this);
}

Error AudioDriverPulseAudio::init() {

	active = false;
	thread_exited = false;
	exit_thread = false;

	mix_rate = GLOBAL_DEF_RST("audio/mix_rate", DEFAULT_MIX_RATE);

	pa_ml = pa_mainloop_new();
	ERR_FAIL_COND_V(pa_ml == NULL, ERR_CANT_OPEN);

	pa_ctx = pa_context_new(pa_mainloop_get_api(pa_ml), "Godot");
	ERR_FAIL_COND_V(pa_ctx == NULL, ERR_CANT_OPEN);

	pa_ready = 0;
	pa_context_set_state_callback(pa_ctx, pa_state_cb, (void *)this);

	int ret = pa_context_connect(pa_ctx, NULL, PA_CONTEXT_NOFLAGS, NULL);
	if (ret < 0) {
		if (pa_ctx) {
			pa_context_unref(pa_ctx);
			pa_ctx = NULL;
		}

		if (pa_ml) {
			pa_mainloop_free(pa_ml);
			pa_ml = NULL;
		}

		return ERR_CANT_OPEN;
	}

	while (pa_ready == 0) {
		pa_mainloop_iterate(pa_ml, 1, NULL);
	}

	if (pa_ready < 0) {
		if (pa_ctx) {
			pa_context_disconnect(pa_ctx);
			pa_context_unref(pa_ctx);
			pa_ctx = NULL;
		}

		if (pa_ml) {
			pa_mainloop_free(pa_ml);
			pa_ml = NULL;
		}

		return ERR_CANT_OPEN;
	}

	Error err = init_device();
	if (err == OK) {
		mutex = Mutex::create();
		thread = Thread::create(AudioDriverPulseAudio::thread_func, this);
	}

	return OK;
}

/*
 * Public API.
 */
xmms_pulse *
xmms_pulse_backend_new (const char *server, const char *name,
                        int *rerror)
{
	xmms_pulse *p;
	int error = PA_ERR_INTERNAL;

	if (server && !*server) {
		if (rerror)
			*rerror = PA_ERR_INVALID;
		return NULL;
	}

	p = g_new0 (xmms_pulse, 1);
	if (!p)
		return NULL;

	p->volume = 100;

	p->mainloop = pa_threaded_mainloop_new ();
	if (!p->mainloop)
		goto fail;

	p->context = pa_context_new (pa_threaded_mainloop_get_api (p->mainloop), name);
	if (!p->context)
		goto fail;

	pa_context_set_state_callback (p->context, context_state_cb, p);

	if (pa_context_connect (p->context, server, 0, NULL) < 0) {
		error = pa_context_errno (p->context);
		goto fail;
	}

	pa_threaded_mainloop_lock (p->mainloop);

	if (pa_threaded_mainloop_start (p->mainloop) < 0)
		goto unlock_and_fail;

	/* Wait until the context is ready */
	pa_threaded_mainloop_wait (p->mainloop);

	if (pa_context_get_state (p->context) != PA_CONTEXT_READY) {
		error = pa_context_errno (p->context);
		goto unlock_and_fail;
	}

	pa_threaded_mainloop_unlock (p->mainloop);
	return p;

 unlock_and_fail:
	pa_threaded_mainloop_unlock (p->mainloop);
 fail:
	if (rerror)
		*rerror = error;
	xmms_pulse_backend_free (p);
	return NULL;
}

JNIEXPORT jlong JNICALL
Java_com_harrcharr_pulse_PulseContext_JNICreate(
		JNIEnv *jenv, jclass jcls, pa_threaded_mainloop *m) {
	dlog(0, "%d", m);
	pa_mainloop_api *api = pa_threaded_mainloop_get_api(m);
	pa_context *c = pa_context_new(api, "primary");

	return c;
}

static void init_pulse_context(){
	if (context==NULL){
		pa_loop=pa_threaded_mainloop_new();
		context=pa_context_new(pa_threaded_mainloop_get_api(pa_loop),NULL);
		pa_context_set_state_callback(context,state_notify,NULL);	
		pa_context_connect(context,NULL,0,NULL);
		pa_threaded_mainloop_start(pa_loop);
		atexit(uninit_pulse_context);
	}
}