/* * VP8 compatible video decoder * * Copyright (C) 2010 David Conrad * Copyright (C) 2010 Ronald S. Bultje * Copyright (C) 2010 Jason Garrett-Glaser * Copyright (C) 2012 Daniel Kang * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVCODEC_VP8_H #define AVCODEC_VP8_H #include "vp56.h" #include "vp56data.h" #include "vp8dsp.h" #include "h264pred.h" #if HAVE_PTHREADS #include <pthread.h> #elif HAVE_W32THREADS #include "w32pthreads.h" #endif #define VP8_MAX_QUANT 127 enum dct_token { DCT_0, DCT_1, DCT_2, DCT_3, DCT_4, DCT_CAT1, DCT_CAT2, DCT_CAT3, DCT_CAT4, DCT_CAT5, DCT_CAT6, DCT_EOB, NUM_DCT_TOKENS }; // used to signal 4x4 intra pred in luma MBs #define MODE_I4x4 4 enum inter_mvmode { VP8_MVMODE_ZERO = MODE_I4x4 + 1, VP8_MVMODE_MV, VP8_MVMODE_SPLIT }; enum inter_splitmvmode { VP8_SPLITMVMODE_16x8 = 0, ///< 2 16x8 blocks (vertical) VP8_SPLITMVMODE_8x16, ///< 2 8x16 blocks (horizontal) VP8_SPLITMVMODE_8x8, ///< 2x2 blocks of 8x8px each VP8_SPLITMVMODE_4x4, ///< 4x4 blocks of 4x4px each VP8_SPLITMVMODE_NONE, ///< (only used in prediction) no split MVs }; typedef struct VP8FilterStrength { uint8_t filter_level; uint8_t inner_limit; uint8_t inner_filter; } VP8FilterStrength; typedef struct VP8Macroblock { uint8_t skip; // todo: make it possible to check for at least (i4x4 or split_mv) // in one op. are others needed? uint8_t mode; uint8_t ref_frame; uint8_t partitioning; uint8_t chroma_pred_mode; uint8_t segment; uint8_t intra4x4_pred_mode_mb[16]; uint8_t intra4x4_pred_mode_top[4]; VP56mv mv; VP56mv bmv[16]; } VP8Macroblock; typedef struct VP8ThreadData { DECLARE_ALIGNED(16, DCTELEM, block)[6][4][16]; DECLARE_ALIGNED(16, DCTELEM, block_dc)[16]; /** * This is the index plus one of the last non-zero coeff * for each of the blocks in the current macroblock. * So, 0 -> no coeffs * 1 -> dc-only (special transform) * 2+-> full transform */ DECLARE_ALIGNED(16, uint8_t, non_zero_count_cache)[6][4]; /** * For coeff decode, we need to know whether the above block had non-zero * coefficients. This means for each macroblock, we need data for 4 luma * blocks, 2 u blocks, 2 v blocks, and the luma dc block, for a total of 9 * per macroblock. We keep the last row in top_nnz. */ DECLARE_ALIGNED(8, uint8_t, left_nnz)[9]; int thread_nr; #if HAVE_THREADS pthread_mutex_t lock; pthread_cond_t cond; #endif int thread_mb_pos; // (mb_y << 16) | (mb_x & 0xFFFF) int wait_mb_pos; // What the current thread is waiting on. uint8_t *edge_emu_buffer; VP8FilterStrength *filter_strength; } VP8ThreadData; #define MAX_THREADS 8 typedef struct VP8Context { VP8ThreadData *thread_data; AVCodecContext *avctx; AVFrame *framep[4]; AVFrame *next_framep[4]; AVFrame *curframe; AVFrame *prev_frame; uint16_t mb_width; /* number of horizontal MB */ uint16_t mb_height; /* number of vertical MB */ int linesize; int uvlinesize; uint8_t keyframe; uint8_t deblock_filter; uint8_t mbskip_enabled; uint8_t profile; VP56mv mv_min; VP56mv mv_max; int8_t sign_bias[4]; ///< one state [0, 1] per ref frame type int ref_count[3]; /** * Base parameters for segmentation, i.e. per-macroblock parameters. * These must be kept unchanged even if segmentation is not used for * a frame, since the values persist between interframes. */ struct { uint8_t enabled; uint8_t absolute_vals; uint8_t update_map; int8_t base_quant[4]; int8_t filter_level[4]; ///< base loop filter level } segmentation; struct { uint8_t simple; uint8_t level; uint8_t sharpness; } filter; VP8Macroblock *macroblocks; uint8_t *intra4x4_pred_mode_top; uint8_t intra4x4_pred_mode_left[4]; /** * Macroblocks can have one of 4 different quants in a frame when * segmentation is enabled. * If segmentation is disabled, only the first segment's values are used. */ struct { // [0] - DC qmul [1] - AC qmul int16_t luma_qmul[2]; int16_t luma_dc_qmul[2]; ///< luma dc-only block quant int16_t chroma_qmul[2]; } qmat[4]; struct { uint8_t enabled; ///< whether each mb can have a different strength based on mode/ref /** * filter strength adjustment for the following macroblock modes: * [0-3] - i16x16 (always zero) * [4] - i4x4 * [5] - zero mv * [6] - inter modes except for zero or split mv * [7] - split mv * i16x16 modes never have any adjustment */ int8_t mode[VP8_MVMODE_SPLIT+1]; /** * filter strength adjustment for macroblocks that reference: * [0] - intra / VP56_FRAME_CURRENT * [1] - VP56_FRAME_PREVIOUS * [2] - VP56_FRAME_GOLDEN * [3] - altref / VP56_FRAME_GOLDEN2 */ int8_t ref[4]; } lf_delta; uint8_t (*top_border)[16+8+8]; uint8_t (*top_nnz)[9]; VP56RangeCoder c; ///< header context, includes mb modes and motion vectors /** * These are all of the updatable probabilities for binary decisions. * They are only implictly reset on keyframes, making it quite likely * for an interframe to desync if a prior frame's header was corrupt * or missing outright! */ struct { uint8_t segmentid[3]; uint8_t mbskip; uint8_t intra; uint8_t last; uint8_t golden; uint8_t pred16x16[4]; uint8_t pred8x8c[3]; uint8_t token[4][16][3][NUM_DCT_TOKENS-1]; uint8_t mvc[2][19]; } prob[2]; VP8Macroblock *macroblocks_base; int invisible; int update_last; ///< update VP56_FRAME_PREVIOUS with the current one int update_golden; ///< VP56_FRAME_NONE if not updated, or which frame to copy if so int update_altref; /** * If this flag is not set, all the probability updates * are discarded after this frame is decoded. */ int update_probabilities; /** * All coefficients are contained in separate arith coding contexts. * There can be 1, 2, 4, or 8 of these after the header context. */ int num_coeff_partitions; VP56RangeCoder coeff_partition[8]; DSPContext dsp; VP8DSPContext vp8dsp; H264PredContext hpc; vp8_mc_func put_pixels_tab[3][3][3]; AVFrame frames[5]; /** * A list of segmentation_map buffers that are to be free()'ed in * the next decoding iteration. We can't free() them right away * because the map may still be used by subsequent decoding threads. * Unused if frame threading is off. */ uint8_t *segmentation_maps[5]; int num_maps_to_be_freed; int maps_are_invalid; int num_jobs; /** * This describes the macroblock memory layout. * 0 -> Only width+height*2+1 macroblocks allocated (frame/single thread). * 1 -> Macroblocks for entire frame alloced (sliced thread). */ int mb_layout; } VP8Context; #endif /* AVCODEC_VP8_H */