#include <dvbuffer.h>
The requested image format depends on the templated pixel type. Frames of size 640 by 480 pixels are requested, at 30fps (except for CVD::Rgb<CVD::byte>, which is 15fps).
| T | The pixel type of the frames. Currently only <CVD::Rgb<CVD::byte> > CVD::yuv411> and CVD::byte> are supported. |
Definition at line 244 of file dvbuffer.h.
Public Member Functions | |
| DVBuffer2 (int cam_no, int num_dma_buffers, int bright=-1, int exposure=-1, double fps=DC::cam_type< T >::fps) | |
| virtual | ~DVBuffer2 () |
| double | frame_rate () |
| virtual ImageRef | size () |
| virtual VideoFrame< T > * | get_frame () |
| virtual void | put_frame (VideoFrame< T > *f) |
| virtual bool | frame_pending () |
| virtual void | seek_to (double) |
| CVD::DVBuffer2< T >::DVBuffer2 | ( | int | cam_no, | |
| int | num_dma_buffers, | |||
| int | bright = -1, |
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| int | exposure = -1, |
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| double | fps = DC::cam_type<T>::fps | |||
| ) | [inline] |
Construct a video buffer.
| cam_no | The camera number (the first camera is 0) | |
| num_dma_buffers | The number of DMA buffers to use (at least 3 is recommended) | |
| bright | The brightness correction (default = -1 = automatic) | |
| exposure | The exposure correction (default = -1 = automatic) | |
| fps | The number of frames per second (default = 30fps) |
Definition at line 253 of file dvbuffer.h.
| double CVD::DVBuffer2< T >::frame_rate | ( | ) | [inline, virtual] |
What is the (expected) frame rate of this video buffer, in frames per second?
Implements CVD::VideoBuffer< T >.
Definition at line 264 of file dvbuffer.h.
| virtual ImageRef CVD::DVBuffer2< T >::size | ( | ) | [inline, virtual] |
The size of the VideoFrames returned by this buffer.
Implements CVD::VideoBuffer< T >.
Definition at line 269 of file dvbuffer.h.
| virtual VideoFrame<T>* CVD::DVBuffer2< T >::get_frame | ( | ) | [inline, virtual] |
Returns the next frame from the buffer. This function blocks until a frame is ready.
Implements CVD::VideoBuffer< T >.
Definition at line 274 of file dvbuffer.h.
| virtual void CVD::DVBuffer2< T >::put_frame | ( | VideoFrame< T > * | f | ) | [inline, virtual] |
Tell the buffer that you are finished with this frame.
Typically the VideoBuffer then destroys the frame.
| f | The frame that you are finished with. |
Implements CVD::VideoBuffer< T >.
Definition at line 279 of file dvbuffer.h.
| virtual bool CVD::DVBuffer2< T >::frame_pending | ( | ) | [inline, virtual] |
Is there a frame waiting in the buffer? This function does not block.
See is_live and is_flushable.
Implements CVD::VideoBuffer< T >.
Definition at line 284 of file dvbuffer.h.
| virtual void CVD::DVBuffer2< T >::seek_to | ( | double | ) | [inline, virtual] |
Go to a particular point in the video buffer (only implemented in buffers of recorded video).
| t | The frame time in seconds |
Reimplemented from CVD::VideoBuffer< T >.
Definition at line 289 of file dvbuffer.h.
1.5.3