Picture parameter for H.264 encoding in baseline, main & high profiles. More...
#include <va_enc_h264.h>
Public Attributes | |
| VAPictureH264 | CurrPic |
| Information about the picture to be encoded. More... | |
| VAPictureH264 | ReferenceFrames [16] |
| Decoded Picture Buffer (DPB). More... | |
| VABufferID | coded_buf |
| Output encoded bitstream. More... | |
| uint8_t | pic_parameter_set_id |
| The picture parameter set referred to in the slice header. | |
| uint8_t | seq_parameter_set_id |
| The active sequence parameter set. Range: 0 to 31, inclusive. | |
| uint8_t | last_picture |
| OR'd flags describing whether the picture is the last one or not. More... | |
| uint16_t | frame_num |
The picture identifier. Range: 0 to  , inclusive. | |
| uint8_t | pic_init_qp |
pic_init_qp_minus26 + 26. | |
| uint8_t | num_ref_idx_l0_active_minus1 |
| Maximum reference index for reference picture list 0. Range: 0 to 31, inclusive. | |
| uint8_t | num_ref_idx_l1_active_minus1 |
| Maximum reference index for reference picture list 1. Range: 0 to 31, inclusive. | |
| int8_t | chroma_qp_index_offset |
| Range: -12 to 12, inclusive. | |
| int8_t | second_chroma_qp_index_offset |
| Range: -12 to 12, inclusive. | |
| uint32_t | va_reserved [VA_PADDING_LOW] |
| Reserved bytes for future use, must be zero. | |
| uint32_t | idr_pic_flag: 1 |
| Is picture an IDR picture? | |
| uint32_t | reference_pic_flag: 2 |
| Is picture a reference picture? | |
| uint32_t | entropy_coding_mode_flag: 1 |
| Selects CAVLC (0) or CABAC (1) entropy coding mode. | |
| uint32_t | weighted_pred_flag: 1 |
| Is weighted prediction applied to P slices? | |
| uint32_t | weighted_bipred_idc: 2 |
| Range: 0 to 2, inclusive. | |
| uint32_t | constrained_intra_pred_flag: 1 |
| Same as the H.264 bitstream syntax element. | |
| uint32_t | transform_8x8_mode_flag: 1 |
| Same as the H.264 bitstream syntax element. | |
| uint32_t | deblocking_filter_control_present_flag: 1 |
| Same as the H.264 bitstream syntax element. | |
| uint32_t | redundant_pic_cnt_present_flag: 1 |
| Same as the H.264 bitstream syntax element. | |
| uint32_t | pic_order_present_flag: 1 |
| Same as the H.264 bitstream syntax element. | |
| uint32_t | pic_scaling_matrix_present_flag: 1 |
| Same as the H.264 bitstream syntax element. | |
Detailed Description
Picture parameter for H.264 encoding in baseline, main & high profiles.
This structure holds information for pic_parameter_set_rbsp() as defined by the H.264 specification.
If packed picture headers mode is used, i.e. if the encoding pipeline was configured with the VA_ENC_PACKED_HEADER_PICTURE flag, then the driver expects two more buffers to be provided to the same vaRenderPicture() as this buffer:
- a VAEncPackedHeaderParameterBuffer with type set to VAEncPackedHeaderType::VAEncPackedHeaderPicture ;
- a #VAEncPackedHeaderDataBuffer which holds the actual packed header data.
If pic_scaling_matrix_present_flag is set to 1, then a VAIQMatrixBufferH264 buffer shall also be provided within the same vaRenderPicture() call as this picture parameter buffer.
Member Data Documentation
◆ coded_buf
| VABufferID VAEncPictureParameterBufferH264::coded_buf |
Output encoded bitstream.
coded_buf has type #VAEncCodedBufferType. It should be large enough to hold the compressed NAL slice and possibly SPS and PPS NAL units.
◆ CurrPic
| VAPictureH264 VAEncPictureParameterBufferH264::CurrPic |
Information about the picture to be encoded.
See #VAPictureH264 for further description of each field. Note that CurrPic.picture_id represents the reconstructed (decoded) picture. User provides a scratch VA surface ID here.
◆ last_picture
| uint8_t VAEncPictureParameterBufferH264::last_picture |
OR'd flags describing whether the picture is the last one or not.
This fields holds 0 if the picture to be encoded is not the last one in the stream or sequence. Otherwise, it is a combination of H264_LAST_PICTURE_EOSEQ or H264_LAST_PICTURE_EOSTREAM.
◆ ReferenceFrames
| VAPictureH264 VAEncPictureParameterBufferH264::ReferenceFrames[16] |
Decoded Picture Buffer (DPB).
This array represents the list of reconstructed (decoded) frames used as reference. It is important to keep track of reconstructed frames so that they can be used later on as reference for P or B-frames encoding.
The documentation for this struct was generated from the following file:
