SDI Technologies iH30 Especificaciones descargar pdf (Pagina 29)

Data Transfer

Quadro SDI Output PG-03776-001_v06 | 24

Frame presentation is always queued until the vertical blanking period of the SDI

device. At that time, the SDI device will display the:

 Last presented frame if there are no additional frames queued to present.

 Next frame in the queue with the minimum presentation time of 0.

 The last frame in the queue that has a minimum presentation time past the current

time.

Queued frames are always consumed in the order in which they were sent. Any

consumed frames not displayed are discarded.

The values of

beginPresentTimeId and presentDurationId represent valid query

objects. These should be utilized to query the time at which the frame is displayed on

the SDI device and the number of vertical retrace intervals that the frame was presented.

Use of these query objects will be discussed in more detail in Section 8.1.2. These values

should be set to 0 if they are unused.

The parameter type indicates the type of data to be displayed. Valid values for type are

GL_FIELDS_NV and GL_FRAME_NV. When GL_FIELDS_NV is specified, both fields must be

specified by target0, fill0, key0, target1, fill1 and key1 in order to complete the frame. In

the case of

GL_FRAME_NV, only target0, fill0 and key0 should be utilized to specify the

frame data.

The parameters target0 and target1 indicate the data object type and can be one of

GL_TEXTURE_2D, GL_TEXTURE_RECTAGLE, GL_RENDERBUFER_EXT or GL_NONE. The

values of fill0 and fill1 name the objects of the corresponding type from which the color

data will be read while key0 and key1 name the objects from which the key channel data

will be read. In the case that there is no key channel data to display, the values of key0

and key1 should be set to

GL_NONE. In this case, the key data is taken from the alpha

channel of the specified fill object. In the case that the type specified is

GL_FRAME_NV,

target1, fill1 and key1 should be specified as

GL_NONE.

void glPresentFrameDualFillNV(uint video_slot,

uint64EXT minPresentTime,

uint beginPresentTimeId,

uint presentDurationId,

enum type,

enum target0, uint fill0,

enum target1, uint fill1,

enum target2, uint fill2,

enum target3, uint fill3);

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SDI Technologies iH30 Especificaciones Pagina 29