This function must read the next packet from the video stream and return
it to Hollywood.
NextPacket() is passed a
struct VideoPacketStruct pointer
that looks like the following:
APTR Packet; // [out]
int Type; // [out]
int Size; // [out]
int Pad; // [unused]
double PTS; // [out]
You have to fill in the following members of the structure:
Must be set to a pointer to the actual packet data. This is an opaque data type
only understood by your plugin. The packet pointer you specify here will be passed
to your plugin's DecodeVideoFrame() or DecodeAudioFrame()
function, depending on the packet type. To free the packet data passed here, Hollywood
will call FreePacket() on it.
This must be set to the type of data that is in the packet. This must be
one of the following predefined types:
Packet contains video data.
Packet contains audio data.
This must be set to the packet's size in bytes.
This must be set to the packet data's presentation time stamp, i.e. the time when
this packet's data should be presented to the viewer, relative to the beginning of
the video stream. You have to specify this time stamp as a floating point number
in seconds, i.e. a presentation time stamp of 10.2 means that the packet's data
is to be shown 10.2 seconds after the start of the video stream. The value you
PTS must be a multiple of the
specified in OpenVideo().
NextPacket() must return a special status code: 0 means success, -1 means
has reached the stream end, and -2 means there was an error.
This function must be implemented in a thread-safe way.