static gboolean
gst_core_audio_select_device_impl (GstCoreAudio * core_audio)
{
AudioDeviceID *devices = NULL;
AudioDeviceID device_id = core_audio->device_id;
AudioDeviceID default_device_id = 0;
gint i, ndevices = 0;
gboolean output = !core_audio->is_src;
gboolean res = FALSE;
#ifdef GST_CORE_AUDIO_DEBUG
AudioChannelLayout *channel_layout;
#endif
devices = _audio_system_get_devices (&ndevices);
if (ndevices < 1) {
GST_ERROR ("no audio output devices found");
goto done;
}
GST_DEBUG ("found %d audio device(s)", ndevices);
#ifdef GST_CORE_AUDIO_DEBUG
for (i = 0; i < ndevices; i++) {
gchar *device_name;
if ((device_name = _audio_device_get_name (devices[i], output))) {
if (!_audio_device_has_output (devices[i])) {
GST_DEBUG ("Input Device ID: %u Name: %s",
(unsigned) devices[i], device_name);
} else {
GST_DEBUG ("Output Device ID: %u Name: %s",
(unsigned) devices[i], device_name);
channel_layout =
gst_core_audio_audio_device_get_channel_layout (devices[i], output);
if (channel_layout) {
gst_core_audio_dump_channel_layout (channel_layout);
g_free (channel_layout);
}
}
g_free (device_name);
}
}
#endif
/* Find the ID of the default output device */
default_device_id = _audio_system_get_default_device (output);
/* Here we decide if selected device is valid or autoselect
* the default one when required */
if (device_id == kAudioDeviceUnknown) {
if (default_device_id != kAudioDeviceUnknown) {
device_id = default_device_id;
res = TRUE;
} else {
/* No device of required type available */
res = FALSE;
}
} else {
for (i = 0; i < ndevices; i++) {
if (device_id == devices[i]) {
res = TRUE;
}
}
if (res && !_audio_device_is_alive (device_id, output)) {
GST_ERROR ("Requested device not usable");
res = FALSE;
goto done;
}
}
if (res)
core_audio->device_id = device_id;
done:
g_free (devices);
return res;
}
static gboolean
gst_osx_audio_sink_allowed_caps (GstOsxAudioSink * osxsink)
{
gint i, channels;
gboolean spdif_allowed;
AudioChannelLayout *layout;
GstElementClass *element_class;
GstPadTemplate *pad_template;
GstCaps *caps, *in_caps;
guint64 channel_mask = 0;
GstAudioChannelPosition *pos = osxsink->channel_positions;
/* First collect info about the HW capabilites and preferences */
spdif_allowed =
gst_core_audio_audio_device_is_spdif_avail (osxsink->device_id);
layout = gst_core_audio_audio_device_get_channel_layout (osxsink->device_id);
GST_DEBUG_OBJECT (osxsink, "Selected device ID: %u SPDIF allowed: %d",
(unsigned) osxsink->device_id, spdif_allowed);
if (layout) {
channels = MIN (layout->mNumberChannelDescriptions,
GST_OSX_AUDIO_MAX_CHANNEL);
} else {
GST_WARNING_OBJECT (osxsink, "This driver does not support "
"kAudioDevicePropertyPreferredChannelLayout.");
channels = 2;
}
switch (channels) {
case 0:
pos[0] = GST_AUDIO_CHANNEL_POSITION_NONE;
break;
case 1:
pos[0] = GST_AUDIO_CHANNEL_POSITION_MONO;
break;
case 2:
pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
channel_mask |= GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_LEFT);
channel_mask |= GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_RIGHT);
break;
default:
channels = MIN (layout->mNumberChannelDescriptions,
GST_OSX_AUDIO_MAX_CHANNEL);
for (i = 0; i < channels; i++) {
switch (layout->mChannelDescriptions[i].mChannelLabel) {
case kAudioChannelLabel_Left:
pos[i] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
break;
case kAudioChannelLabel_Right:
pos[i] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
break;
case kAudioChannelLabel_Center:
pos[i] = GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER;
break;
case kAudioChannelLabel_LFEScreen:
pos[i] = GST_AUDIO_CHANNEL_POSITION_LFE1;
break;
case kAudioChannelLabel_LeftSurround:
pos[i] = GST_AUDIO_CHANNEL_POSITION_REAR_LEFT;
break;
case kAudioChannelLabel_RightSurround:
pos[i] = GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT;
break;
case kAudioChannelLabel_RearSurroundLeft:
pos[i] = GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT;
break;
case kAudioChannelLabel_RearSurroundRight:
pos[i] = GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT;
break;
case kAudioChannelLabel_CenterSurround:
pos[i] = GST_AUDIO_CHANNEL_POSITION_REAR_CENTER;
break;
default:
GST_WARNING_OBJECT (osxsink, "unrecognized channel: %d",
(int) layout->mChannelDescriptions[i].mChannelLabel);
channel_mask = 0;
channels = 2;
break;
}
}
}
g_free (layout);
/* Recover the template caps */
element_class = GST_ELEMENT_GET_CLASS (osxsink);
pad_template = gst_element_class_get_pad_template (element_class, "sink");
in_caps = gst_pad_template_get_caps (pad_template);
/* Create the allowed subset */
caps = gst_caps_new_empty ();
for (i = 0; i < gst_caps_get_size (in_caps); i++) {
GstStructure *in_s, *out_s;
in_s = gst_caps_get_structure (in_caps, i);
if (gst_structure_has_name (in_s, "audio/x-ac3") ||
gst_structure_has_name (in_s, "audio/x-dts")) {
if (spdif_allowed) {
gst_caps_append_structure (caps, gst_structure_copy (in_s));
}
}
gst_audio_channel_positions_to_mask (pos, channels, false, &channel_mask);
out_s = gst_structure_copy (in_s);
gst_structure_remove_fields (out_s, "channels", "channel-mask", NULL);
gst_structure_set (out_s, "channels", G_TYPE_INT, channels,
"channel-mask", GST_TYPE_BITMASK, channel_mask, NULL);
gst_caps_append_structure (caps, out_s);
}
if (osxsink->cached_caps) {
gst_caps_unref (osxsink->cached_caps);
}
osxsink->cached_caps = caps;
osxsink->channels = channels;
return TRUE;
}
