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+/*
+ * VP9 compatible video decoder
+ *
+ * Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
+ * Copyright (C) 2013 Clément Bœsch <u pkh me>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_VP9DEC_H
+#define AVCODEC_VP9DEC_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdatomic.h>
+
+#include "libavutil/buffer.h"
+#include "libavutil/mem_internal.h"
+#include "libavutil/thread.h"
+#include "libavutil/internal.h"
+
+#include "get_bits.h"
+#include "videodsp.h"
+#include "vp9.h"
+#include "vp9dsp.h"
+#include "vp9shared.h"
+#include "vpx_rac.h"
+
+#define REF_INVALID_SCALE 0xFFFF
+
+enum MVJoint {
+ MV_JOINT_ZERO,
+ MV_JOINT_H,
+ MV_JOINT_V,
+ MV_JOINT_HV,
+};
+
+typedef struct ProbContext {
+ uint8_t y_mode[4][9];
+ uint8_t uv_mode[10][9];
+ uint8_t filter[4][2];
+ uint8_t mv_mode[7][3];
+ uint8_t intra[4];
+ uint8_t comp[5];
+ uint8_t single_ref[5][2];
+ uint8_t comp_ref[5];
+ uint8_t tx32p[2][3];
+ uint8_t tx16p[2][2];
+ uint8_t tx8p[2];
+ uint8_t skip[3];
+ uint8_t mv_joint[3];
+ struct {
+ uint8_t sign;
+ uint8_t classes[10];
+ uint8_t class0;
+ uint8_t bits[10];
+ uint8_t class0_fp[2][3];
+ uint8_t fp[3];
+ uint8_t class0_hp;
+ uint8_t hp;
+ } mv_comp[2];
+ uint8_t partition[4][4][3];
+} ProbContext;
+
+typedef struct VP9Filter {
+ uint8_t level[8 * 8];
+ uint8_t /* bit=col */ mask[2 /* 0=y, 1=uv */][2 /* 0=col, 1=row */]
+ [8 /* rows */][4 /* 0=16, 1=8, 2=4, 3=inner4 */];
+} VP9Filter;
+
+typedef struct VP9Block {
+ uint8_t seg_id, intra, comp, ref[2], mode[4], uvmode, skip;
+ enum FilterMode filter;
+ VP9mv mv[4 /* b_idx */][2 /* ref */];
+ enum BlockSize bs;
+ enum TxfmMode tx, uvtx;
+ enum BlockLevel bl;
+ enum BlockPartition bp;
+} VP9Block;
+
+typedef struct VP9TileData VP9TileData;
+
+typedef struct VP9Context {
+ VP9SharedContext s;
+ VP9TileData *td;
+
+ VP9DSPContext dsp;
+ VideoDSPContext vdsp;
+ GetBitContext gb;
+ VPXRangeCoder c;
+ int pass, active_tile_cols;
+
+#if HAVE_THREADS
+ pthread_mutex_t progress_mutex;
+ pthread_cond_t progress_cond;
+ atomic_int *entries;
+ unsigned pthread_init_cnt;
+#endif
+
+ uint8_t ss_h, ss_v;
+ uint8_t last_bpp, bpp_index, bytesperpixel;
+ uint8_t last_keyframe;
+ // sb_cols/rows, rows/cols and last_fmt are used for allocating all internal
+ // arrays, and are thus per-thread. w/h and gf_fmt are synced between threads
+ // and are therefore per-stream. pix_fmt represents the value in the header
+ // of the currently processed frame.
+ int w, h;
+ enum AVPixelFormat pix_fmt, last_fmt, gf_fmt;
+ unsigned sb_cols, sb_rows, rows, cols;
+ ThreadFrame next_refs[8];
+
+ struct {
+ uint8_t lim_lut[64];
+ uint8_t mblim_lut[64];
+ } filter_lut;
+ struct {
+ ProbContext p;
+ uint8_t coef[4][2][2][6][6][3];
+ } prob_ctx[4];
+ struct {
+ ProbContext p;
+ uint8_t coef[4][2][2][6][6][11];
+ } prob;
+
+ // contextual (above) cache
+ uint8_t *above_partition_ctx;
+ uint8_t *above_mode_ctx;
+ // FIXME maybe merge some of the below in a flags field?
+ uint8_t *above_y_nnz_ctx;
+ uint8_t *above_uv_nnz_ctx[2];
+ uint8_t *above_skip_ctx; // 1bit
+ uint8_t *above_txfm_ctx; // 2bit
+ uint8_t *above_segpred_ctx; // 1bit
+ uint8_t *above_intra_ctx; // 1bit
+ uint8_t *above_comp_ctx; // 1bit
+ uint8_t *above_ref_ctx; // 2bit
+ uint8_t *above_filter_ctx;
+ VP9mv (*above_mv_ctx)[2];
+
+ // whole-frame cache
+ uint8_t *intra_pred_data[3];
+ VP9Filter *lflvl;
+
+ // block reconstruction intermediates
+ int block_alloc_using_2pass;
+ uint16_t mvscale[3][2];
+ uint8_t mvstep[3][2];
+
+ // frame specific buffer pools
+ AVBufferPool *frame_extradata_pool;
+ int frame_extradata_pool_size;
+} VP9Context;
+
+struct VP9TileData {
+ const VP9Context *s;
+ VPXRangeCoder *c_b;
+ VPXRangeCoder *c;
+ int row, row7, col, col7;
+ uint8_t *dst[3];
+ ptrdiff_t y_stride, uv_stride;
+ VP9Block *b_base, *b;
+ unsigned tile_col_start;
+
+ struct {
+ unsigned y_mode[4][10];
+ unsigned uv_mode[10][10];
+ unsigned filter[4][3];
+ unsigned mv_mode[7][4];
+ unsigned intra[4][2];
+ unsigned comp[5][2];
+ unsigned single_ref[5][2][2];
+ unsigned comp_ref[5][2];
+ unsigned tx32p[2][4];
+ unsigned tx16p[2][3];
+ unsigned tx8p[2][2];
+ unsigned skip[3][2];
+ unsigned mv_joint[4];
+ struct {
+ unsigned sign[2];
+ unsigned classes[11];
+ unsigned class0[2];
+ unsigned bits[10][2];
+ unsigned class0_fp[2][4];
+ unsigned fp[4];
+ unsigned class0_hp[2];
+ unsigned hp[2];
+ } mv_comp[2];
+ unsigned partition[4][4][4];
+ unsigned coef[4][2][2][6][6][3];
+ unsigned eob[4][2][2][6][6][2];
+ } counts;
+
+ // whole-frame cache
+ DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer)[135 * 144 * 2];
+
+ // contextual (left) cache
+ DECLARE_ALIGNED(16, uint8_t, left_y_nnz_ctx)[16];
+ DECLARE_ALIGNED(16, uint8_t, left_mode_ctx)[16];
+ DECLARE_ALIGNED(16, VP9mv, left_mv_ctx)[16][2];
+ DECLARE_ALIGNED(16, uint8_t, left_uv_nnz_ctx)[2][16];
+ DECLARE_ALIGNED(8, uint8_t, left_partition_ctx)[8];
+ DECLARE_ALIGNED(8, uint8_t, left_skip_ctx)[8];
+ DECLARE_ALIGNED(8, uint8_t, left_txfm_ctx)[8];
+ DECLARE_ALIGNED(8, uint8_t, left_segpred_ctx)[8];
+ DECLARE_ALIGNED(8, uint8_t, left_intra_ctx)[8];
+ DECLARE_ALIGNED(8, uint8_t, left_comp_ctx)[8];
+ DECLARE_ALIGNED(8, uint8_t, left_ref_ctx)[8];
+ DECLARE_ALIGNED(8, uint8_t, left_filter_ctx)[8];
+ // block reconstruction intermediates
+ DECLARE_ALIGNED(32, uint8_t, tmp_y)[64 * 64 * 2];
+ DECLARE_ALIGNED(32, uint8_t, tmp_uv)[2][64 * 64 * 2];
+ struct { int x, y; } min_mv, max_mv;
+ int16_t *block_base, *block, *uvblock_base[2], *uvblock[2];
+ uint8_t *eob_base, *uveob_base[2], *eob, *uveob[2];
+
+ // error message
+ int error_info;
+ struct {
+ unsigned int row:13;
+ unsigned int col:13;
+ unsigned int block_size_idx_x:2;
+ unsigned int block_size_idx_y:2;
+ } *block_structure;
+ unsigned int nb_block_structure;
+};
+
+void ff_vp9_fill_mv(VP9TileData *td, VP9mv *mv, int mode, int sb);
+
+void ff_vp9_adapt_probs(VP9Context *s);
+
+void ff_vp9_decode_block(VP9TileData *td, int row, int col,
+ VP9Filter *lflvl, ptrdiff_t yoff, ptrdiff_t uvoff,
+ enum BlockLevel bl, enum BlockPartition bp);
+
+void ff_vp9_loopfilter_sb(AVCodecContext *avctx, VP9Filter *lflvl,
+ int row, int col, ptrdiff_t yoff, ptrdiff_t uvoff);
+
+void ff_vp9_intra_recon_8bpp(VP9TileData *td,
+ ptrdiff_t y_off, ptrdiff_t uv_off);
+void ff_vp9_intra_recon_16bpp(VP9TileData *td,
+ ptrdiff_t y_off, ptrdiff_t uv_off);
+void ff_vp9_inter_recon_8bpp(VP9TileData *td);
+void ff_vp9_inter_recon_16bpp(VP9TileData *td);
+
+#endif /* AVCODEC_VP9DEC_H */