| /* |
| * VP8 compatible video decoder |
| * |
| * Copyright (C) 2010 David Conrad |
| * Copyright (C) 2010 Ronald S. Bultje |
| * Copyright (C) 2010 Fiona Glaser |
| * Copyright (C) 2012 Daniel Kang |
| * |
| * 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_VP8_H |
| #define AVCODEC_VP8_H |
| |
| #include <stdatomic.h> |
| |
| #include "libavutil/buffer.h" |
| #include "libavutil/mem_internal.h" |
| #include "libavutil/thread.h" |
| |
| #include "h264pred.h" |
| #include "thread.h" |
| #include "vp56.h" |
| #include "vp8dsp.h" |
| |
| #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]; |
| DECLARE_ALIGNED(4, uint8_t, intra4x4_pred_mode_top)[4]; |
| VP56mv mv; |
| VP56mv bmv[16]; |
| } VP8Macroblock; |
| |
| typedef struct VP8intmv { |
| int x; |
| int y; |
| } VP8intmv; |
| |
| typedef struct VP8mvbounds { |
| VP8intmv mv_min; |
| VP8intmv mv_max; |
| } VP8mvbounds; |
| |
| typedef struct VP8ThreadData { |
| DECLARE_ALIGNED(16, int16_t, block)[6][4][16]; |
| DECLARE_ALIGNED(16, int16_t, 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 |
| atomic_int thread_mb_pos; // (mb_y << 16) | (mb_x & 0xFFFF) |
| atomic_int wait_mb_pos; // What the current thread is waiting on. |
| |
| #define EDGE_EMU_LINESIZE 32 |
| DECLARE_ALIGNED(16, uint8_t, edge_emu_buffer)[21 * EDGE_EMU_LINESIZE]; |
| VP8FilterStrength *filter_strength; |
| VP8mvbounds mv_bounds; |
| } VP8ThreadData; |
| |
| typedef struct VP8Frame { |
| ThreadFrame tf; |
| AVBufferRef *seg_map; |
| |
| AVBufferRef *hwaccel_priv_buf; |
| void *hwaccel_picture_private; |
| } VP8Frame; |
| |
| #define MAX_THREADS 8 |
| typedef struct VP8Context { |
| VP8ThreadData *thread_data; |
| AVCodecContext *avctx; |
| enum AVPixelFormat pix_fmt; |
| int actually_webp; |
| |
| VP8Frame *framep[4]; |
| VP8Frame *next_framep[4]; |
| VP8Frame *curframe; |
| VP8Frame *prev_frame; |
| |
| uint16_t mb_width; /* number of horizontal MB */ |
| uint16_t mb_height; /* number of vertical MB */ |
| ptrdiff_t linesize; |
| ptrdiff_t uvlinesize; |
| |
| uint8_t keyframe; |
| uint8_t deblock_filter; |
| uint8_t mbskip_enabled; |
| uint8_t profile; |
| VP8mvbounds mv_bounds; |
| |
| 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; |
| uint8_t update_feature_data; |
| 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]; |
| |
| // Raw quantisation values, which may be needed by hwaccel decode. |
| struct { |
| int yac_qi; |
| int ydc_delta; |
| int y2dc_delta; |
| int y2ac_delta; |
| int uvdc_delta; |
| int uvac_delta; |
| } quant; |
| |
| struct { |
| uint8_t enabled; ///< whether each mb can have a different strength based on mode/ref |
| uint8_t update; |
| |
| /** |
| * 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 |
| |
| /* This contains the entropy coder state at the end of the header |
| * block, in the form specified by the standard. For use by |
| * hwaccels, so that a hardware decoder has the information to |
| * start decoding at the macroblock layer. |
| */ |
| struct { |
| const uint8_t *input; |
| uint32_t range; |
| uint32_t value; |
| int bit_count; |
| } coder_state_at_header_end; |
| |
| int header_partition_size; |
| |
| /** |
| * These are all of the updatable probabilities for binary decisions. |
| * They are only implicitly 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]; |
| uint8_t scan[16]; |
| } 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]; |
| int coeff_partition_size[8]; |
| VideoDSPContext vdsp; |
| VP8DSPContext vp8dsp; |
| H264PredContext hpc; |
| vp8_mc_func put_pixels_tab[3][3][3]; |
| VP8Frame frames[5]; |
| |
| uint8_t colorspace; ///< 0 is the only value allowed (meaning bt601) |
| uint8_t fullrange; ///< whether we can skip clamping in dsp functions |
| |
| 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 allocated (sliced thread). |
| */ |
| int mb_layout; |
| |
| int (*decode_mb_row_no_filter)(AVCodecContext *avctx, void *tdata, int jobnr, int threadnr); |
| void (*filter_mb_row)(AVCodecContext *avctx, void *tdata, int jobnr, int threadnr); |
| |
| int vp7; |
| |
| /** |
| * Fade bit present in bitstream (VP7) |
| */ |
| int fade_present; |
| |
| /** |
| * Interframe DC prediction (VP7) |
| * [0] VP56_FRAME_PREVIOUS |
| * [1] VP56_FRAME_GOLDEN |
| */ |
| uint16_t inter_dc_pred[2][2]; |
| |
| /** |
| * Macroblock features (VP7) |
| */ |
| uint8_t feature_enabled[4]; |
| uint8_t feature_present_prob[4]; |
| uint8_t feature_index_prob[4][3]; |
| uint8_t feature_value[4][4]; |
| } VP8Context; |
| |
| int ff_vp8_decode_init(AVCodecContext *avctx); |
| |
| int ff_vp8_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
| AVPacket *avpkt); |
| |
| int ff_vp8_decode_free(AVCodecContext *avctx); |
| |
| #endif /* AVCODEC_VP8_H */ |