593 lines
23 KiB
C
593 lines
23 KiB
C
/*
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* Copyright (c) 2007-2011 Intel Corporation. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file va_enc_h264.h
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* \brief The H.264 encoding API
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*
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* This file contains the \ref api_enc_h264 "H.264 encoding API".
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*/
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#ifndef VA_ENC_H264_H
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#define VA_ENC_H264_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \defgroup api_enc_h264 H.264 encoding API
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*
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* @{
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*/
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/**
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* @name Picture flags
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*
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* Those flags flags are meant to signal when a picture marks the end
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* of a sequence, a stream, or even both at once.
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*
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* @{
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*/
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/**
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* \brief Marks the last picture in the sequence.
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*
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* i.e. the driver appends \c end_of_seq() NAL unit to the encoded frame.
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*/
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#define H264_LAST_PICTURE_EOSEQ 0x01
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/**
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* \brief Marks the last picture in the stream.
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*
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* i.e. the driver appends \c end_of_stream() NAL unit to the encoded frame.
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*/
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#define H264_LAST_PICTURE_EOSTREAM 0x02
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/**@}*/
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/**
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* \brief Packed header types specific to H.264 encoding.
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*
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* Types of packed headers generally used for H.264 encoding. Each
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* associated packed header data buffer shall contain the start code
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* prefix 0x000001 followed by the complete NAL unit, thus also
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* including the \c nal_unit_type.
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*
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* Note: the start code prefix can contain an arbitrary number of leading
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* zeros. The driver will skip them for emulation prevention bytes insertion,
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* if necessary.
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*/
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typedef enum {
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/**
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* \brief Packed Sequence Parameter Set (SPS).
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*
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* The corresponding packed header data buffer shall contain the
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* complete seq_parameter_set_rbsp() syntax element.
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*
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* Note: packed \c nal_unit_type shall be equal to 7.
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*/
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VAEncPackedHeaderH264_SPS = VAEncPackedHeaderSequence,
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/**
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* \brief Packed Picture Parameter Set (PPS).
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*
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* The corresponding packed header data buffer shall contain the
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* complete pic_parameter_set_rbsp() syntax element.
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*
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* Note: packed \c nal_unit_type shall be equal to 8.
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*/
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VAEncPackedHeaderH264_PPS = VAEncPackedHeaderPicture,
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/**
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* \brief Packed slice header.
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*
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* The corresponding packed header data buffer shall contain the
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* \c slice_header() syntax element only, along with any start
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* code prefix and NAL unit type preceeding it. i.e. this means
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* that the buffer does not contain any of the \c slice_data() or
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* the \c rbsp_slice_trailing_bits().
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*
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* Note: packed \c nal_unit_type shall be equal to 1 (non-IDR
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* picture), or 5 (IDR picture).
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*/
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VAEncPackedHeaderH264_Slice = VAEncPackedHeaderSlice,
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/**
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* \brief Packed Supplemental Enhancement Information (SEI).
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*
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* The corresponding packed header data buffer shall contain the
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* complete sei_rbsp() syntax element, thus including several
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* sei_message() elements if necessary.
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*
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* Note: packed \c nal_unit_type shall be equal to 6.
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*/
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VAEncPackedHeaderH264_SEI = (VAEncPackedHeaderMiscMask | 1),
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} VAEncPackedHeaderTypeH264;
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/**
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* \brief Sequence parameter for H.264 encoding in baseline, main & high
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* profiles.
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*
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* This structure holds information for \c seq_parameter_set_data() as
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* defined by the H.264 specification.
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*
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* If packed sequence headers mode is used, i.e. if the encoding
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* pipeline was configured with the #VA_ENC_PACKED_HEADER_SEQUENCE
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* flag, then the driver expects two more buffers to be provided to
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* the same \c vaRenderPicture() as this buffer:
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* - a #VAEncPackedHeaderParameterBuffer with type set to
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* VAEncPackedHeaderType::VAEncPackedHeaderSequence ;
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* - a #VAEncPackedHeaderDataBuffer which holds the actual packed
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* header data.
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*
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* If \c seq_scaling_matrix_present_flag is set to \c 1, then a
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* #VAIQMatrixBufferH264 buffer shall also be provided within the same
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* \c vaRenderPicture() call as this sequence parameter buffer.
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*/
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typedef struct _VAEncSequenceParameterBufferH264 {
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned char seq_parameter_set_id;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned char level_idc;
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/** \brief Period between I frames. */
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unsigned int intra_period;
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/** \brief Period between IDR frames. */
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unsigned int intra_idr_period;
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/** \brief Period between I/P frames. */
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unsigned int ip_period;
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/**
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* \brief Initial bitrate set for this sequence in CBR or VBR modes.
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*
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* This field represents the initial bitrate value for this
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* sequence if CBR or VBR mode is used, i.e. if the encoder
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* pipeline was created with a #VAConfigAttribRateControl
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* attribute set to either \ref VA_RC_CBR or \ref VA_RC_VBR.
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*
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* The bitrate can be modified later on through
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* #VAEncMiscParameterRateControl buffers.
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*/
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unsigned int bits_per_second;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int max_num_ref_frames;
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/** \brief Picture width in macroblocks. */
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unsigned short picture_width_in_mbs;
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/** \brief Picture height in macroblocks. */
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unsigned short picture_height_in_mbs;
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union {
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struct {
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int chroma_format_idc : 2;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int frame_mbs_only_flag : 1;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int mb_adaptive_frame_field_flag : 1;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int seq_scaling_matrix_present_flag : 1;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int direct_8x8_inference_flag : 1;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int log2_max_frame_num_minus4 : 4;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int pic_order_cnt_type : 2;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int log2_max_pic_order_cnt_lsb_minus4 : 4;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int delta_pic_order_always_zero_flag : 1;
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} bits;
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unsigned int value;
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} seq_fields;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned char bit_depth_luma_minus8;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned char bit_depth_chroma_minus8;
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/** if pic_order_cnt_type == 1 */
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/**@{*/
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned char num_ref_frames_in_pic_order_cnt_cycle;
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/** \brief Same as the H.264 bitstream syntax element. */
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int offset_for_non_ref_pic;
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/** \brief Same as the H.264 bitstream syntax element. */
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int offset_for_top_to_bottom_field;
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/** \brief Same as the H.264 bitstream syntax element. */
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int offset_for_ref_frame[256];
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/**@}*/
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/** @name Cropping (optional) */
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/**@{*/
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned char frame_cropping_flag;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int frame_crop_left_offset;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int frame_crop_right_offset;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int frame_crop_top_offset;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int frame_crop_bottom_offset;
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/**@}*/
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/** @name VUI parameters (optional) */
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/**@{*/
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned char vui_parameters_present_flag;
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union {
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struct {
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int aspect_ratio_info_present_flag : 1;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int timing_info_present_flag : 1;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int bitstream_restriction_flag : 1;
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/** \brief Range: 0 to 16, inclusive. */
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unsigned int log2_max_mv_length_horizontal : 5;
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/** \brief Range: 0 to 16, inclusive. */
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unsigned int log2_max_mv_length_vertical : 5;
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} bits;
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unsigned int value;
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} vui_fields;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned char aspect_ratio_idc;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int sar_width;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int sar_height;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int num_units_in_tick;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int time_scale;
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/**@}*/
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} VAEncSequenceParameterBufferH264;
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/**
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* \brief Picture parameter for H.264 encoding in baseline, main & high
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* profiles.
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*
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* This structure holds information for \c pic_parameter_set_rbsp() as
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* defined by the H.264 specification.
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*
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* If packed picture headers mode is used, i.e. if the encoding
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* pipeline was configured with the #VA_ENC_PACKED_HEADER_PICTURE
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* flag, then the driver expects two more buffers to be provided to
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* the same \c vaRenderPicture() as this buffer:
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* - a #VAEncPackedHeaderParameterBuffer with type set to
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* VAEncPackedHeaderType::VAEncPackedHeaderPicture ;
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* - a #VAEncPackedHeaderDataBuffer which holds the actual packed
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* header data.
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*
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* If \c pic_scaling_matrix_present_flag is set to \c 1, then a
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* #VAIQMatrixBufferH264 buffer shall also be provided within the same
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* \c vaRenderPicture() call as this picture parameter buffer.
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*/
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typedef struct _VAEncPictureParameterBufferH264 {
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/**
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* \brief Information about the picture to be encoded.
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*
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* See #VAPictureH264 for further description of each field.
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* Note that CurrPic.picture_id represents the reconstructed
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* (decoded) picture. User provides a scratch VA surface ID here.
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*/
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VAPictureH264 CurrPic;
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/**
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* \brief Decoded Picture Buffer (DPB).
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*
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* This array represents the list of reconstructed (decoded)
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* frames used as reference. It is important to keep track of
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* reconstructed frames so that they can be used later on as
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* reference for P or B-frames encoding.
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*/
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VAPictureH264 ReferenceFrames[16];
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/**
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* \brief Output encoded bitstream.
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*
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* \ref coded_buf has type #VAEncCodedBufferType. It should be
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* large enough to hold the compressed NAL slice and possibly SPS
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* and PPS NAL units.
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*/
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VABufferID coded_buf;
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/** \brief The picture parameter set referred to in the slice header. */
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unsigned char pic_parameter_set_id;
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/** \brief The active sequence parameter set. Range: 0 to 31, inclusive. */
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unsigned char seq_parameter_set_id;
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/**
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* \brief OR'd flags describing whether the picture is the last one or not.
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*
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* This fields holds 0 if the picture to be encoded is not the last
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* one in the stream or sequence. Otherwise, it is a combination of
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* \ref H264_LAST_PICTURE_EOSEQ or \ref H264_LAST_PICTURE_EOSTREAM.
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*/
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unsigned char last_picture;
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/** \brief The picture identifier.
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* Range: 0 to \f$2^{log2\_max\_frame\_num\_minus4 + 4} - 1\f$, inclusive.
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*/
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unsigned short frame_num;
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/** \brief \c pic_init_qp_minus26 + 26. */
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unsigned char pic_init_qp;
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/** \brief Maximum reference index for reference picture list 0.
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* Range: 0 to 31, inclusive.
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*/
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unsigned char num_ref_idx_l0_active_minus1;
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/** \brief Maximum reference index for reference picture list 1.
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* Range: 0 to 31, inclusive.
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*/
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unsigned char num_ref_idx_l1_active_minus1;
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/** \brief Range: -12 to 12, inclusive. */
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signed char chroma_qp_index_offset;
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/** \brief Range: -12 to 12, inclusive. */
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signed char second_chroma_qp_index_offset;
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union {
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struct {
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/** \brief Is picture an IDR picture? */
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unsigned int idr_pic_flag : 1;
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/** \brief Is picture a reference picture? */
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unsigned int reference_pic_flag : 2;
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/** \brief Selects CAVLC (0) or CABAC (1) entropy coding mode. */
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unsigned int entropy_coding_mode_flag : 1;
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/** \brief Is weighted prediction applied to P slices? */
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unsigned int weighted_pred_flag : 1;
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/** \brief Range: 0 to 2, inclusive. */
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unsigned int weighted_bipred_idc : 2;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int constrained_intra_pred_flag : 1;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int transform_8x8_mode_flag : 1;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int deblocking_filter_control_present_flag : 1;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int redundant_pic_cnt_present_flag : 1;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int pic_order_present_flag : 1;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned int pic_scaling_matrix_present_flag : 1;
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} bits;
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unsigned int value;
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} pic_fields;
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} VAEncPictureParameterBufferH264;
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/**
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* \brief Slice parameter for H.264 encoding in baseline, main & high profiles.
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*
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* This structure holds information for \c
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* slice_layer_without_partitioning_rbsp() as defined by the H.264
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* specification.
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*
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* If packed slice headers mode is used, i.e. if the encoding
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* pipeline was configured with the #VA_ENC_PACKED_HEADER_SLICE
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* flag, then the driver expects two more buffers to be provided to
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* the same \c vaRenderPicture() as this buffer:
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* - a #VAEncPackedHeaderParameterBuffer with type set to
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* VAEncPackedHeaderType::VAEncPackedHeaderSlice ;
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* - a #VAEncPackedHeaderDataBuffer which holds the actual packed
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* header data.
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*
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* If per-macroblock encoder configuration is needed, \c macroblock_info
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* references a buffer of type #VAEncMacroblockParameterBufferH264. This
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* buffer is not passed to vaRenderPicture(). i.e. it is not destroyed
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* by subsequent calls to vaRenderPicture() and then can be re-used
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* without re-allocating the whole buffer.
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*/
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typedef struct _VAEncSliceParameterBufferH264 {
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/** \brief Starting MB address for this slice. */
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unsigned int macroblock_address;
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/** \brief Number of macroblocks in this slice. */
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unsigned int num_macroblocks;
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/**
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* \brief Per-MB encoder configuration buffer, or \c VA_INVALID_ID.
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*
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* If per-MB encoder configuration is needed, then \ref macroblock_info
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* references a buffer of type #VAEncMacroblockParameterBufferH264
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* (\c VAEncMacroblockParameterBufferType). Otherwise, buffer id
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* is set to \c VA_INVALID_ID and per-MB configuration is derived
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* from this slice parameter.
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*
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* The \c macroblock_info buffer must hold \ref num_macroblocks
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* elements.
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*/
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VABufferID macroblock_info;
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/** \brief Slice type.
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* Range: 0..2, 5..7, i.e. no switching slices.
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*/
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unsigned char slice_type;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned char pic_parameter_set_id;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned short idr_pic_id;
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/** @name If pic_order_cnt_type == 0 */
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/**@{*/
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/** \brief The picture order count modulo MaxPicOrderCntLsb. */
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unsigned short pic_order_cnt_lsb;
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/** \brief Valid if \c pic_order_present_flag and this is a bottom field. */
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int delta_pic_order_cnt_bottom;
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/**@}*/
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/** @name If pic_order_cnt_type == 1 && !delta_pic_order_always_zero_flag */
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/**@{*/
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/** \brief [0]: top, [1]: bottom. */
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int delta_pic_order_cnt[2];
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/**@}*/
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/** @name If slice_type == B */
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/**@{*/
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unsigned char direct_spatial_mv_pred_flag;
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/**@}*/
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/** @name If slice_type == P */
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/**@{*/
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/** \brief Specifies if
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* \ref _VAEncPictureParameterBufferH264::num_ref_idx_l0_active_minus1 or
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* \ref _VAEncPictureParameterBufferH264::num_ref_idx_l1_active_minus1 are
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* overriden by the values for this slice.
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*/
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unsigned char num_ref_idx_active_override_flag;
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/** \brief Maximum reference index for reference picture list 0.
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* Range: 0 to 31, inclusive.
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*/
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unsigned char num_ref_idx_l0_active_minus1;
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/** \brief Maximum reference index for reference picture list 1.
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* Range: 0 to 31, inclusive.
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*/
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unsigned char num_ref_idx_l1_active_minus1;
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/** \brief Reference picture list 0 (for P slices). */
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VAPictureH264 RefPicList0[32];
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/** \brief Reference picture list 1 (for B slices). */
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VAPictureH264 RefPicList1[32];
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/**@}*/
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/** @name pred_weight_table() */
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/**@{*/
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned char luma_log2_weight_denom;
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/** \brief Same as the H.264 bitstream syntax element. */
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unsigned char chroma_log2_weight_denom;
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/** \brief Same as the H.264 bitstream syntax element. */
|
|
unsigned char luma_weight_l0_flag;
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
signed short luma_weight_l0[32];
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
signed short luma_offset_l0[32];
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
unsigned char chroma_weight_l0_flag;
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
signed short chroma_weight_l0[32][2];
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
signed short chroma_offset_l0[32][2];
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
unsigned char luma_weight_l1_flag;
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
signed short luma_weight_l1[32];
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
signed short luma_offset_l1[32];
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
unsigned char chroma_weight_l1_flag;
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
signed short chroma_weight_l1[32][2];
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
signed short chroma_offset_l1[32][2];
|
|
/**@}*/
|
|
|
|
/** \brief Range: 0 to 2, inclusive. */
|
|
unsigned char cabac_init_idc;
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
signed char slice_qp_delta;
|
|
/** @name If deblocking_filter_control_present_flag */
|
|
/**@{*/
|
|
/** \brief Range: 0 to 2, inclusive. */
|
|
unsigned char disable_deblocking_filter_idc;
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
signed char slice_alpha_c0_offset_div2;
|
|
/** \brief Same as the H.264 bitstream syntax element. */
|
|
signed char slice_beta_offset_div2;
|
|
/**@}*/
|
|
} VAEncSliceParameterBufferH264;
|
|
|
|
/**
|
|
* @name Macroblock neighbour availability bits
|
|
*
|
|
* \anchor api_enc_h264_mb_pred_avail_bits
|
|
* Definitions for macroblock neighbour availability bits used in
|
|
* intra prediction mode (non MBAFF only).
|
|
*
|
|
* @{
|
|
*/
|
|
/** \brief References macroblock in the top-left corner. */
|
|
#define VA_MB_PRED_AVAIL_TOP_LEFT (1 << 2)
|
|
/** \brief References macroblock above the current macroblock. */
|
|
#define VA_MB_PRED_AVAIL_TOP (1 << 4)
|
|
/** \brief References macroblock in the top-right corner. */
|
|
#define VA_MB_PRED_AVAIL_TOP_RIGHT (1 << 3)
|
|
/** \brief References macroblock on the left of the current macroblock. */
|
|
#define VA_MB_PRED_AVAIL_LEFT (1 << 6)
|
|
/**@}*/
|
|
|
|
/**
|
|
* \brief Macroblock parameter for H.264 encoding in baseline, main & high
|
|
* profiles.
|
|
*
|
|
* This structure holds per-macroblock information. The buffer must be
|
|
* allocated with as many elements (macroblocks) as necessary to fit
|
|
* the slice to be encoded. Besides, the per-macroblock records must
|
|
* be written in a strict raster order and with no gap. i.e. every
|
|
* macroblock, regardless of its type, shall have an entry.
|
|
*/
|
|
typedef struct _VAEncMacroblockParameterBufferH264 {
|
|
/**
|
|
* \brief Quantization parameter.
|
|
*
|
|
* Requested quantization parameter. Range: 0 to 51, inclusive.
|
|
* If \ref qp is set to 0xff, then the actual value is derived
|
|
* from the slice-level value: \c pic_init_qp + \c slice_qp_delta.
|
|
*/
|
|
unsigned char qp;
|
|
|
|
union {
|
|
/** @name Data for intra macroblock */
|
|
/**@{*/
|
|
struct {
|
|
union {
|
|
/**
|
|
* \brief Flag specified to override MB neighbour
|
|
* availability bits from VME stage.
|
|
*
|
|
* This flag specifies that macroblock neighbour
|
|
* availability bits from the VME stage are overriden
|
|
* by the \ref pred_avail_flags hereunder.
|
|
*/
|
|
unsigned int pred_avail_override_flag : 1;
|
|
/**
|
|
* \brief Bitwise representation of which macroblocks
|
|
* are available for intra prediction.
|
|
*
|
|
* If the slice is intra-coded, this field represents
|
|
* the macroblocks available for intra prediction.
|
|
* See \ref api_enc_h264_mb_pred_avail_bits
|
|
* "macroblock neighbour availability" bit definitions.
|
|
*/
|
|
unsigned int pred_avail_flags : 8;
|
|
} bits;
|
|
unsigned int value;
|
|
} intra_fields;
|
|
/**@}*/
|
|
|
|
/** @name Data for inter macroblock */
|
|
/**@{*/
|
|
struct {
|
|
union {
|
|
} bits;
|
|
unsigned int value;
|
|
} inter_fields;
|
|
/**@}*/
|
|
} info;
|
|
} VAEncMacroblockParameterBufferH264;
|
|
|
|
/**@}*/
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* VA_ENC_H264_H */
|