Classes | |
struct | v4l2_ctrl_videodec_statusmetadata_ |
Holds the decoder error status metadata for the frame. More... | |
struct | v4l2_ctrl_videodec_refframe_metadata_ |
Holds the the frame specific metadata for a reference frame. More... | |
struct | v4l2_ctrl_videodec_currentframe_metadata_ |
Holds the the frame specific metadata for the current frame. More... | |
struct | v4l2_ctrl_videodec_dpbinfometadata_ |
Holds the decoder DPB info metadata. More... | |
struct | v4l2_ctrl_h264dec_bufmetadata_ |
Holds H.264 specific decoder metadata for the frame. More... | |
struct | v4l2_ctrl_hevcdec_bufmetadata_ |
Holds H.265 specific decoder metadata for the frame. More... | |
struct | v4l2_ctrl_videodec_outputbuf_metadata_ |
Holds the video decoder output metadata for a frame. More... | |
Defines | |
#define | V4L2_CID_MPEG_VIDEO_DISABLE_COMPLETE_FRAME_INPUT (V4L2_CID_MPEG_BASE+515) |
Control ID to indicate to the decoder that the input buffers will not contain complete buffers. | |
#define | V4L2_CID_MPEG_VIDEO_DISABLE_DPB (V4L2_CID_MPEG_BASE+516) |
Control ID to disable decoder DPB management. | |
#define | V4L2_CID_MPEG_VIDEO_ERROR_REPORTING (V4L2_CID_MPEG_BASE+517) |
Control ID to enable decoder error and metadata reporting. | |
#define | V4L2_CID_MPEG_VIDEO_SKIP_FRAMES (V4L2_CID_MPEG_BASE+518) |
Control ID to set the skip frames property of the decoder. | |
#define | V4L2_CID_MPEG_VIDEODEC_METADATA (V4L2_CID_MPEG_BASE+519) |
Control ID to get the decoder output metadata. | |
Typedefs | |
typedef struct v4l2_ctrl_videodec_statusmetadata_ | v4l2_ctrl_videodec_statusmetadata |
Holds the decoder error status metadata for the frame. | |
typedef struct v4l2_ctrl_videodec_refframe_metadata_ | v4l2_ctrl_videodec_refframe_metadata |
Holds the the frame specific metadata for a reference frame. | |
typedef struct v4l2_ctrl_videodec_currentframe_metadata_ | v4l2_ctrl_videodec_currentframe_metadata |
Holds the the frame specific metadata for the current frame. | |
typedef struct v4l2_ctrl_videodec_dpbinfometadata_ | v4l2_ctrl_videodec_dpbinfometadata |
Holds the decoder DPB info metadata. | |
typedef struct v4l2_ctrl_h264dec_bufmetadata_ | v4l2_ctrl_h264dec_bufmetadata |
Holds H.264 specific decoder metadata for the frame. | |
typedef struct v4l2_ctrl_hevcdec_bufmetadata_ | v4l2_ctrl_hevcdec_bufmetadata |
Holds H.265 specific decoder metadata for the frame. | |
typedef struct v4l2_ctrl_videodec_outputbuf_metadata_ | v4l2_ctrl_videodec_outputbuf_metadata |
Holds the video decoder output metadata for a frame. | |
Enumerations | |
enum | v4l2_skip_frames_type { V4L2_SKIP_FRAMES_TYPE_NONE = 0, V4L2_SKIP_FRAMES_TYPE_NONREF = 1, V4L2_SKIP_FRAMES_TYPE_DECODE_IDR_ONLY = 2 } |
Enum v4l2_skip_frames_type, possible methods for decoder skip frames. More... |
The video decoder device node is "/dev/nvhost-nvdec".
### Supported pixelformats: OUTPUT PLANE | CAPTURE PLANE :----------------: | :----------------: V4L2_PIX_FMT_H264 | V4L2_PIX_FMT_NV12M V4L2_PIX_FMT_H265 | V4L2_PIX_FMT_NV12M
### Supported memory types: MEMORY | OUTPUT PLANE | CAPTURE PLANE :------------------: | :----------: | :-----------: V4L2_MEMORY_MMAP | Y | Y V4L2_MEMORY_DMABUF | N | N V4L2_MEMORY_USERPTR | N | N
### Supported controls:
### Supported events: Event | Purpose ----------------------------- | :----------------------------: V4L2_EVENT_RESOLUTION_CHANGE | Resolution of the stream has changed.
### Handling resolution change events: When the decoder generates a V4L2_EVENT_RESOLUTION_CHANGE event, the application should call STREAMOFF on the capture plane, tell decoder to deallocate the current buffers by calling REQBUF with count zero, get the new capture plane format, and then proceed with setting up the buffers for the capture plane.
In case of decoder, the buffer format might differ from the Display resolution. The application should use VIDIOC_G_CROP to get the display resolution.
### EOS Handling: Following sequence should be followed for sending EOS and recieving EOS from the decoder.
### Decoder output frame metadata: Decoder supports reporting frame related metadata including error reports and DPB info. See V4L2_CID_MPEG_VIDEO_ERROR_REPORTING, V4L2_CID_MPEG_VIDEODEC_METADATA and v4l2_ctrl_video_metadata for more information.
#define V4L2_CID_MPEG_VIDEO_DISABLE_COMPLETE_FRAME_INPUT (V4L2_CID_MPEG_BASE+515) |
Control ID to indicate to the decoder that the input buffers will not contain complete buffers.
Definition at line 426 of file v4l2_nv_extensions.h.
#define V4L2_CID_MPEG_VIDEO_DISABLE_DPB (V4L2_CID_MPEG_BASE+516) |
Control ID to disable decoder DPB management.
Definition at line 438 of file v4l2_nv_extensions.h.
#define V4L2_CID_MPEG_VIDEO_ERROR_REPORTING (V4L2_CID_MPEG_BASE+517) |
Control ID to enable decoder error and metadata reporting.
A boolean value should be supplied with this control.
Definition at line 448 of file v4l2_nv_extensions.h.
#define V4L2_CID_MPEG_VIDEO_SKIP_FRAMES (V4L2_CID_MPEG_BASE+518) |
Control ID to set the skip frames property of the decoder.
Decoder can be configured to skip certain types of frames. One of v4l2_skip_frames_type should be passed.
Definition at line 460 of file v4l2_nv_extensions.h.
#define V4L2_CID_MPEG_VIDEODEC_METADATA (V4L2_CID_MPEG_BASE+519) |
Control ID to get the decoder output metadata.
Definition at line 475 of file v4l2_nv_extensions.h.
typedef struct v4l2_ctrl_h264dec_bufmetadata_ v4l2_ctrl_h264dec_bufmetadata |
Holds H.264 specific decoder metadata for the frame.
typedef struct v4l2_ctrl_hevcdec_bufmetadata_ v4l2_ctrl_hevcdec_bufmetadata |
Holds H.265 specific decoder metadata for the frame.
Holds the the frame specific metadata for the current frame.
Holds the decoder DPB info metadata.
Holds the video decoder output metadata for a frame.
Holds the the frame specific metadata for a reference frame.
Holds the decoder error status metadata for the frame.
Enum v4l2_skip_frames_type, possible methods for decoder skip frames.
V4L2_SKIP_FRAMES_TYPE_NONE | Do not skip any frame. |
V4L2_SKIP_FRAMES_TYPE_NONREF | Skip all non-reference frames. |
V4L2_SKIP_FRAMES_TYPE_DECODE_IDR_ONLY | Skip all frames except IDR. |
Definition at line 809 of file v4l2_nv_extensions.h.