static gboolean
gst_cel_video_src_open_device (GstCelVideoSrc * self)
{
GstCoreMediaCtx *ctx = NULL;
GError *error = NULL;
GstCMApi *cm = NULL;
GstMTApi *mt = NULL;
GstCelApi *cel = NULL;
OSStatus status;
FigCaptureDeviceRef device = NULL;
FigBaseObjectRef device_base;
FigBaseVTable *device_vt;
CFArrayRef stream_array = NULL;
CFIndex stream_index;
FigCaptureStreamRef stream = NULL;
FigBaseObjectRef stream_base;
FigBaseVTable *stream_vt;
CMBufferQueueRef queue = NULL;
CMTime ignored_time;
ctx = gst_core_media_ctx_new (GST_API_CORE_VIDEO | GST_API_CORE_MEDIA
| GST_API_MEDIA_TOOLBOX | GST_API_CELESTIAL, &error);
if (error != NULL)
goto api_error;
cm = ctx->cm;
mt = ctx->mt;
cel = ctx->cel;
status = cel->FigCreateCaptureDevicesAndStreamsForPreset (NULL,
*(cel->kFigRecorderCapturePreset_VideoRecording), NULL,
&device, &stream, NULL, NULL);
if (status == kCelError_ResourceBusy)
goto device_busy;
else if (status != noErr)
goto unexpected_error;
device_base = mt->FigCaptureDeviceGetFigBaseObject (device);
device_vt = cm->FigBaseObjectGetVTable (device_base);
status = device_vt->base->CopyProperty (device_base,
*(mt->kFigCaptureDeviceProperty_StreamArray), NULL,
(CFTypeRef *) & stream_array);
if (status != noErr)
goto unexpected_error;
if (self->device_index >= 0)
stream_index = self->device_index;
else
stream_index = 0;
if (stream_index >= CFArrayGetCount (stream_array))
goto invalid_device_index;
CFRelease (stream);
stream = (FigCaptureStreamRef) CFArrayGetValueAtIndex (stream_array,
stream_index);
CFRetain (stream);
stream_base = mt->FigCaptureStreamGetFigBaseObject (stream);
stream_vt = cm->FigBaseObjectGetVTable (stream_base);
status = stream_vt->base->CopyProperty (stream_base,
*(mt->kFigCaptureStreamProperty_BufferQueue), NULL, &queue);
if (status != noErr)
goto unexpected_error;
self->queue_is_ready = FALSE;
ignored_time = cm->CMTimeMake (1, 1);
status = cm->CMBufferQueueInstallTrigger (queue,
gst_cel_video_src_on_queue_ready, self,
kCMBufferQueueTrigger_WhenDataBecomesReady, ignored_time,
&self->ready_trigger);
if (status != noErr)
goto unexpected_error;
self->ctx = ctx;
self->device = device;
self->device_iface = device_vt->derived;
self->device_base = device_base;
self->device_base_iface = device_vt->base;
self->stream = stream;
self->stream_iface = stream_vt->derived;
self->stream_base = stream_base;
self->stream_base_iface = stream_vt->base;
self->queue = queue;
self->duration = GST_CLOCK_TIME_NONE;
CFRelease (stream_array);
return TRUE;
/* ERRORS */
api_error:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED, ("API error"),
("%s", error->message));
g_clear_error (&error);
goto any_error;
}
device_busy:
{
GST_ELEMENT_ERROR (self, RESOURCE, BUSY,
("device is already in use"), (NULL));
goto any_error;
}
invalid_device_index:
{
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
("invalid video capture device index"), (NULL));
goto any_error;
}
unexpected_error:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
("unexpected error while opening device (%d)", (gint) status), (NULL));
goto any_error;
}
any_error:
{
if (stream != NULL)
CFRelease (stream);
if (stream_array != NULL)
CFRelease (stream_array);
if (device != NULL)
CFRelease (device);
if (ctx != NULL) {
cm->FigBufferQueueRelease (queue);
g_object_unref (ctx);
}
return FALSE;
}
}
