require PulseAudio 5.0 and drop some old code

backends/pulse/pulse-device.c

@@ -260,15 +260,9 @@ pulse_device_update (PulseDevice *device, const pa_card_info *info)
    g_return_if_fail (PULSE_IS_DEVICE (device));
    g_return_if_fail (info != NULL);

#if PA_CHECK_VERSION (5, 0, 0)
    if G_LIKELY (info->active_profile2 != NULL)
        pulse_device_switch_set_active_profile_by_name (device->priv->pswitch,
                                                        info->active_profile2->name);
#else
    if G_LIKELY (info->active_profile != NULL)
        pulse_device_switch_set_active_profile_by_name (device->priv->pswitch,
                                                        info->active_profile->name);
#endif
}

void
@@ -404,18 +398,13 @@ pulse_device_load (PulseDevice *device, const pa_card_info *info)
    for (i = 0; i < info->n_profiles; i++) {
        PulseDeviceProfile *profile;

#if PA_CHECK_VERSION (5, 0, 0)
        pa_card_profile_info2 *p_info = info->profiles2[i];

        /* PulseAudio 5.0 includes a new pa_card_profile_info2 which only
         * differs in the new available flag, we use it not to include profiles
         * which are unavailable */
        if (p_info->available == 0)
            continue;
#else
        /* The old profile list is an array of structs, not pointers */
        pa_card_profile_info *p_info = &info->profiles[i];
#endif

        profile = pulse_device_profile_new (p_info->name,
                                            p_info->description,

configure.ac

@@ -113,7 +113,7 @@ AC_SUBST(HAVE_NULL)
# -----------------------------------------------------------------------
# PulseAudio
# -----------------------------------------------------------------------
PA_REQUIRED_VERSION=2.0.0
PA_REQUIRED_VERSION=5.0.0

AC_ARG_ENABLE([pulseaudio],
              AS_HELP_STRING([--enable-pulseaudio],