GstNetTimePacket: GStreamer 1.0 Library Reference Manual

## GstNetTimePacket GstNetTimePacket — Helper structure to construct clock packets used by network clocks. |

## Functions

GstNetTimePacket * | gst_net_time_packet_new ()
GstNetTimePacket * | gst_net_time_packet_copy ()
void | gst_net_time_packet_free ()
GstNetTimePacket * | gst_net_time_packet_receive ()
gboolean | gst_net_time_packet_send ()
guint8 * | gst_net_time_packet_serialize ()

## Types and Values

struct | GstNetTimePacket
#define | GST_NET_TIME_PACKET_SIZE

## Includes

    #include <gst/net/gstnet.h>

## Description

Various functions for receiving, sending an serializing GstNetTimePacket structures.

## Functions

### gst_net_time_packet_new ()

    GstNetTimePacket *
    gst_net_time_packet_new (const guint8 *buffer);

Creates a new GstNetTimePacket from a buffer received over the network. The caller is responsible for ensuring that `buffer` is at least GST_NET_TIME_PACKET_SIZE bytes long.

If `buffer` is NULL, the local and remote times will be set to GST_CLOCK_TIME_NONE.

MT safe. Caller owns return value (gst_net_time_packet_free to free).

#### Parameters

buffer | a buffer from which to construct the packet, or NULL. | [array]

#### Returns

The new GstNetTimePacket.

### gst_net_time_packet_copy ()

    GstNetTimePacket *
    gst_net_time_packet_copy (const GstNetTimePacket *packet);

Make a copy of `packet` .

#### Parameters

packet | the GstNetTimePacket |

#### Returns

a copy of `packet` , free with `gst_net_time_packet_free()`.

### gst_net_time_packet_free ()

    void
    gst_net_time_packet_free (GstNetTimePacket *packet);

Free `packet` .

#### Parameters

packet | the GstNetTimePacket |

### gst_net_time_packet_receive ()

    GstNetTimePacket *
    gst_net_time_packet_receive (GSocket *socket,
                                 GSocketAddress **src_address,
                                 GError **error);

Receives a GstNetTimePacket over a socket. Handles interrupted system calls, but otherwise returns NULL on error.

#### Parameters

socket | socket to receive the time packet on |
src_address | address of variable to return sender address. | [out]
error | return address for a GError, or NULL |

#### Returns

a new GstNetTimePacket, or NULL on error. Free with `gst_net_time_packet_free()` when done.

[transfer full]

### gst_net_time_packet_send ()

    gboolean
    gst_net_time_packet_send (const GstNetTimePacket *packet,
                              GSocket *socket,
                              GSocketAddress *dest_address,
                              GError **error);

Sends a GstNetTimePacket over a socket.

MT safe.

#### Parameters

packet | the GstNetTimePacket to send |
socket | socket to send the time packet on |
dest_address | address to send the time packet to |
error | return address for a GError, or NULL |

#### Returns

TRUE if successful, FALSE in case an error occurred.

### gst_net_time_packet_serialize ()

    guint8 *
    gst_net_time_packet_serialize (const GstNetTimePacket *packet);

Serialized a GstNetTimePacket into a newly-allocated sequence of GST_NET_TIME_PACKET_SIZE bytes, in network byte order. The value returned is suitable for passing to write(2) or sendto(2) for communication over the network.

MT safe. Caller owns return value (g_free to free).

#### Parameters

packet | the GstNetTimePacket |

#### Returns

A newly allocated sequence of GST_NET_TIME_PACKET_SIZE bytes.

## Types and Values

### struct GstNetTimePacket

    struct GstNetTimePacket {
      GstClockTime local_time;
      GstClockTime remote_time;
    };

Content of a GstNetTimePacket.

#### Members

GstClockTime `local_time`; | the local time when this packet was sent |
GstClockTime `remote_time`; | the remote time observation |

### GST_NET_TIME_PACKET_SIZE

    #define GST_NET_TIME_PACKET_SIZE 16

The size of the packets sent between network clocks.

## See Also

GstClock, GstNetClientClock, GstNetTimeProvider