linux / linux / kernel / git / gregkh / usb / 1709b887397cb371ed149560a48d24b232c53ccd / . / include / media / v4l2-vp9.h

/* SPDX-License-Identifier: GPL-2.0-or-later */ | |

/* | |

* Helper functions for vp9 codecs. | |

* | |

* Copyright (c) 2021 Collabora, Ltd. | |

* | |

* Author: Andrzej Pietrasiewicz <andrzej.p@collabora.com> | |

*/ | |

#ifndef _MEDIA_V4L2_VP9_H | |

#define _MEDIA_V4L2_VP9_H | |

#include <media/v4l2-ctrls.h> | |

/** | |

* struct v4l2_vp9_frame_mv_context - motion vector-related probabilities | |

* | |

* @joint: motion vector joint probabilities. | |

* @sign: motion vector sign probabilities. | |

* @classes: motion vector class probabilities. | |

* @class0_bit: motion vector class0 bit probabilities. | |

* @bits: motion vector bits probabilities. | |

* @class0_fr: motion vector class0 fractional bit probabilities. | |

* @fr: motion vector fractional bit probabilities. | |

* @class0_hp: motion vector class0 high precision fractional bit probabilities. | |

* @hp: motion vector high precision fractional bit probabilities. | |

* | |

* A member of v4l2_vp9_frame_context. | |

*/ | |

struct v4l2_vp9_frame_mv_context { | |

u8 joint[3]; | |

u8 sign[2]; | |

u8 classes[2][10]; | |

u8 class0_bit[2]; | |

u8 bits[2][10]; | |

u8 class0_fr[2][2][3]; | |

u8 fr[2][3]; | |

u8 class0_hp[2]; | |

u8 hp[2]; | |

}; | |

/** | |

* struct v4l2_vp9_frame_context - frame probabilities, including motion-vector related | |

* | |

* @tx8: TX 8x8 probabilities. | |

* @tx16: TX 16x16 probabilities. | |

* @tx32: TX 32x32 probabilities. | |

* @coef: coefficient probabilities. | |

* @skip: skip probabilities. | |

* @inter_mode: inter mode probabilities. | |

* @interp_filter: interpolation filter probabilities. | |

* @is_inter: is inter-block probabilities. | |

* @comp_mode: compound prediction mode probabilities. | |

* @single_ref: single ref probabilities. | |

* @comp_ref: compound ref probabilities. | |

* @y_mode: Y prediction mode probabilities. | |

* @uv_mode: UV prediction mode probabilities. | |

* @partition: partition probabilities. | |

* @mv: motion vector probabilities. | |

* | |

* Drivers which need to keep track of frame context(s) can use this struct. | |

* The members correspond to probability tables, which are specified only implicitly in the | |

* vp9 spec. Section 10.5 "Default probability tables" contains all the types of involved | |

* tables, i.e. the actual tables are of the same kind, and when they are reset (which is | |

* mandated by the spec sometimes) they are overwritten with values from the default tables. | |

*/ | |

struct v4l2_vp9_frame_context { | |

u8 tx8[2][1]; | |

u8 tx16[2][2]; | |

u8 tx32[2][3]; | |

u8 coef[4][2][2][6][6][3]; | |

u8 skip[3]; | |

u8 inter_mode[7][3]; | |

u8 interp_filter[4][2]; | |

u8 is_inter[4]; | |

u8 comp_mode[5]; | |

u8 single_ref[5][2]; | |

u8 comp_ref[5]; | |

u8 y_mode[4][9]; | |

u8 uv_mode[10][9]; | |

u8 partition[16][3]; | |

struct v4l2_vp9_frame_mv_context mv; | |

}; | |

/** | |

* struct v4l2_vp9_frame_symbol_counts - pointers to arrays of symbol counts | |

* | |

* @partition: partition counts. | |

* @skip: skip counts. | |

* @intra_inter: is inter-block counts. | |

* @tx32p: TX32 counts. | |

* @tx16p: TX16 counts. | |

* @tx8p: TX8 counts. | |

* @y_mode: Y prediction mode counts. | |

* @uv_mode: UV prediction mode counts. | |

* @comp: compound prediction mode counts. | |

* @comp_ref: compound ref counts. | |

* @single_ref: single ref counts. | |

* @mv_mode: inter mode counts. | |

* @filter: interpolation filter counts. | |

* @mv_joint: motion vector joint counts. | |

* @sign: motion vector sign counts. | |

* @classes: motion vector class counts. | |

* @class0: motion vector class0 bit counts. | |

* @bits: motion vector bits counts. | |

* @class0_fp: motion vector class0 fractional bit counts. | |

* @fp: motion vector fractional bit counts. | |

* @class0_hp: motion vector class0 high precision fractional bit counts. | |

* @hp: motion vector high precision fractional bit counts. | |

* @coeff: coefficient counts. | |

* @eob: eob counts | |

* | |

* The fields correspond to what is specified in section 8.3 "Clear counts process" of the spec. | |

* Different pieces of hardware can report the counts in different order, so we cannot rely on | |

* simply overlaying a struct on a relevant block of memory. Instead we provide pointers to | |

* arrays or array of pointers to arrays in case of coeff, or array of pointers for eob. | |

*/ | |

struct v4l2_vp9_frame_symbol_counts { | |

u32 (*partition)[16][4]; | |

u32 (*skip)[3][2]; | |

u32 (*intra_inter)[4][2]; | |

u32 (*tx32p)[2][4]; | |

u32 (*tx16p)[2][4]; | |

u32 (*tx8p)[2][2]; | |

u32 (*y_mode)[4][10]; | |

u32 (*uv_mode)[10][10]; | |

u32 (*comp)[5][2]; | |

u32 (*comp_ref)[5][2]; | |

u32 (*single_ref)[5][2][2]; | |

u32 (*mv_mode)[7][4]; | |

u32 (*filter)[4][3]; | |

u32 (*mv_joint)[4]; | |

u32 (*sign)[2][2]; | |

u32 (*classes)[2][11]; | |

u32 (*class0)[2][2]; | |

u32 (*bits)[2][10][2]; | |

u32 (*class0_fp)[2][2][4]; | |

u32 (*fp)[2][4]; | |

u32 (*class0_hp)[2][2]; | |

u32 (*hp)[2][2]; | |

u32 (*coeff[4][2][2][6][6])[3]; | |

u32 *eob[4][2][2][6][6][2]; | |

}; | |

extern const u8 v4l2_vp9_kf_y_mode_prob[10][10][9]; /* Section 10.4 of the spec */ | |

extern const u8 v4l2_vp9_kf_partition_probs[16][3]; /* Section 10.4 of the spec */ | |

extern const u8 v4l2_vp9_kf_uv_mode_prob[10][9]; /* Section 10.4 of the spec */ | |

extern const struct v4l2_vp9_frame_context v4l2_vp9_default_probs; /* Section 10.5 of the spec */ | |

/** | |

* v4l2_vp9_fw_update_probs() - Perform forward update of vp9 probabilities | |

* | |

* @probs: current probabilities values | |

* @deltas: delta values from compressed header | |

* @dec_params: vp9 frame decoding parameters | |

* | |

* This function performs forward updates of probabilities for the vp9 boolean decoder. | |

* The frame header can contain a directive to update the probabilities (deltas), if so, then | |

* the deltas are provided in the header, too. The userspace parses those and passes the said | |

* deltas struct to the kernel. | |

*/ | |

void v4l2_vp9_fw_update_probs(struct v4l2_vp9_frame_context *probs, | |

const struct v4l2_ctrl_vp9_compressed_hdr *deltas, | |

const struct v4l2_ctrl_vp9_frame *dec_params); | |

/** | |

* v4l2_vp9_reset_frame_ctx() - Reset appropriate frame context | |

* | |

* @dec_params: vp9 frame decoding parameters | |

* @frame_context: array of the 4 frame contexts | |

* | |

* This function resets appropriate frame contexts, based on what's in dec_params. | |

* | |

* Returns the frame context index after the update, which might be reset to zero if | |

* mandated by the spec. | |

*/ | |

u8 v4l2_vp9_reset_frame_ctx(const struct v4l2_ctrl_vp9_frame *dec_params, | |

struct v4l2_vp9_frame_context *frame_context); | |

/** | |

* v4l2_vp9_adapt_coef_probs() - Perform backward update of vp9 coefficients probabilities | |

* | |

* @probs: current probabilities values | |

* @counts: values of symbol counts after the current frame has been decoded | |

* @use_128: flag to request that 128 is used as update factor if true, otherwise 112 is used | |

* @frame_is_intra: flag indicating that FrameIsIntra is true | |

* | |

* This function performs backward updates of coefficients probabilities for the vp9 boolean | |

* decoder. After a frame has been decoded the counts of how many times a given symbol has | |

* occurred are known and are used to update the probability of each symbol. | |

*/ | |

void v4l2_vp9_adapt_coef_probs(struct v4l2_vp9_frame_context *probs, | |

struct v4l2_vp9_frame_symbol_counts *counts, | |

bool use_128, | |

bool frame_is_intra); | |

/** | |

* v4l2_vp9_adapt_noncoef_probs() - Perform backward update of vp9 non-coefficients probabilities | |

* | |

* @probs: current probabilities values | |

* @counts: values of symbol counts after the current frame has been decoded | |

* @reference_mode: specifies the type of inter prediction to be used. See | |

* &v4l2_vp9_reference_mode for more details | |

* @interpolation_filter: specifies the filter selection used for performing inter prediction. | |

* See &v4l2_vp9_interpolation_filter for more details | |

* @tx_mode: specifies the TX mode. See &v4l2_vp9_tx_mode for more details | |

* @flags: combination of V4L2_VP9_FRAME_FLAG_* flags | |

* | |

* This function performs backward updates of non-coefficients probabilities for the vp9 boolean | |

* decoder. After a frame has been decoded the counts of how many times a given symbol has | |

* occurred are known and are used to update the probability of each symbol. | |

*/ | |

void v4l2_vp9_adapt_noncoef_probs(struct v4l2_vp9_frame_context *probs, | |

struct v4l2_vp9_frame_symbol_counts *counts, | |

u8 reference_mode, u8 interpolation_filter, u8 tx_mode, | |

u32 flags); | |

/** | |

* v4l2_vp9_seg_feat_enabled() - Check if a segmentation feature is enabled | |

* | |

* @feature_enabled: array of 8-bit flags (for all segments) | |

* @feature: id of the feature to check | |

* @segid: id of the segment to look up | |

* | |

* This function returns true if a given feature is active in a given segment. | |

*/ | |

bool | |

v4l2_vp9_seg_feat_enabled(const u8 *feature_enabled, | |

unsigned int feature, | |

unsigned int segid); | |

#endif /* _MEDIA_V4L2_VP9_H */ |