forked from KolibriOS/kolibrios
ffmpeg-2.8.5
git-svn-id: svn://kolibrios.org@6147 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
318
contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavcodec/vp8.h
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318
contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavcodec/vp8.h
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/*
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* VP8 compatible video decoder
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*
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* Copyright (C) 2010 David Conrad
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* Copyright (C) 2010 Ronald S. Bultje
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* Copyright (C) 2010 Fiona Glaser
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* Copyright (C) 2012 Daniel Kang
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_VP8_H
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#define AVCODEC_VP8_H
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#include "libavutil/buffer.h"
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#include "h264pred.h"
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#include "thread.h"
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#include "vp56.h"
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#include "vp8dsp.h"
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#if HAVE_PTHREADS
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# include <pthread.h>
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#elif HAVE_OS2THREADS
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# include "compat/os2threads.h"
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#elif HAVE_W32THREADS
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# include "compat/w32pthreads.h"
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#endif
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#define VP8_MAX_QUANT 127
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enum dct_token {
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DCT_0,
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DCT_1,
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DCT_2,
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DCT_3,
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DCT_4,
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DCT_CAT1,
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DCT_CAT2,
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DCT_CAT3,
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DCT_CAT4,
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DCT_CAT5,
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DCT_CAT6,
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DCT_EOB,
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NUM_DCT_TOKENS
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};
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// used to signal 4x4 intra pred in luma MBs
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#define MODE_I4x4 4
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enum inter_mvmode {
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VP8_MVMODE_ZERO = MODE_I4x4 + 1,
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VP8_MVMODE_MV,
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VP8_MVMODE_SPLIT
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};
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enum inter_splitmvmode {
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VP8_SPLITMVMODE_16x8 = 0, ///< 2 16x8 blocks (vertical)
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VP8_SPLITMVMODE_8x16, ///< 2 8x16 blocks (horizontal)
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VP8_SPLITMVMODE_8x8, ///< 2x2 blocks of 8x8px each
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VP8_SPLITMVMODE_4x4, ///< 4x4 blocks of 4x4px each
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VP8_SPLITMVMODE_NONE, ///< (only used in prediction) no split MVs
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};
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typedef struct VP8FilterStrength {
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uint8_t filter_level;
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uint8_t inner_limit;
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uint8_t inner_filter;
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} VP8FilterStrength;
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typedef struct VP8Macroblock {
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uint8_t skip;
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// TODO: make it possible to check for at least (i4x4 or split_mv)
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// in one op. are others needed?
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uint8_t mode;
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uint8_t ref_frame;
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uint8_t partitioning;
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uint8_t chroma_pred_mode;
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uint8_t segment;
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uint8_t intra4x4_pred_mode_mb[16];
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DECLARE_ALIGNED(4, uint8_t, intra4x4_pred_mode_top)[4];
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VP56mv mv;
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VP56mv bmv[16];
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} VP8Macroblock;
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typedef struct VP8ThreadData {
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DECLARE_ALIGNED(16, int16_t, block)[6][4][16];
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DECLARE_ALIGNED(16, int16_t, block_dc)[16];
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/**
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* This is the index plus one of the last non-zero coeff
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* for each of the blocks in the current macroblock.
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* So, 0 -> no coeffs
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* 1 -> dc-only (special transform)
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* 2+-> full transform
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*/
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DECLARE_ALIGNED(16, uint8_t, non_zero_count_cache)[6][4];
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/**
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* For coeff decode, we need to know whether the above block had non-zero
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* coefficients. This means for each macroblock, we need data for 4 luma
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* blocks, 2 u blocks, 2 v blocks, and the luma dc block, for a total of 9
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* per macroblock. We keep the last row in top_nnz.
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*/
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DECLARE_ALIGNED(8, uint8_t, left_nnz)[9];
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int thread_nr;
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#if HAVE_THREADS
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pthread_mutex_t lock;
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pthread_cond_t cond;
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#endif
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int thread_mb_pos; // (mb_y << 16) | (mb_x & 0xFFFF)
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int wait_mb_pos; // What the current thread is waiting on.
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#define EDGE_EMU_LINESIZE 32
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DECLARE_ALIGNED(16, uint8_t, edge_emu_buffer)[21 * EDGE_EMU_LINESIZE];
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VP8FilterStrength *filter_strength;
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} VP8ThreadData;
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typedef struct VP8Frame {
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ThreadFrame tf;
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AVBufferRef *seg_map;
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} VP8Frame;
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typedef struct VP8intmv {
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int x;
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int y;
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} VP8intmv;
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#define MAX_THREADS 8
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typedef struct VP8Context {
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VP8ThreadData *thread_data;
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AVCodecContext *avctx;
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VP8Frame *framep[4];
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VP8Frame *next_framep[4];
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VP8Frame *curframe;
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VP8Frame *prev_frame;
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uint16_t mb_width; /* number of horizontal MB */
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uint16_t mb_height; /* number of vertical MB */
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int linesize;
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int uvlinesize;
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uint8_t keyframe;
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uint8_t deblock_filter;
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uint8_t mbskip_enabled;
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uint8_t profile;
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VP8intmv mv_min;
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VP8intmv mv_max;
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int8_t sign_bias[4]; ///< one state [0, 1] per ref frame type
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int ref_count[3];
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/**
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* Base parameters for segmentation, i.e. per-macroblock parameters.
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* These must be kept unchanged even if segmentation is not used for
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* a frame, since the values persist between interframes.
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*/
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struct {
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uint8_t enabled;
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uint8_t absolute_vals;
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uint8_t update_map;
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int8_t base_quant[4];
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int8_t filter_level[4]; ///< base loop filter level
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} segmentation;
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struct {
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uint8_t simple;
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uint8_t level;
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uint8_t sharpness;
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} filter;
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VP8Macroblock *macroblocks;
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uint8_t *intra4x4_pred_mode_top;
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uint8_t intra4x4_pred_mode_left[4];
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/**
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* Macroblocks can have one of 4 different quants in a frame when
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* segmentation is enabled.
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* If segmentation is disabled, only the first segment's values are used.
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*/
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struct {
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// [0] - DC qmul [1] - AC qmul
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int16_t luma_qmul[2];
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int16_t luma_dc_qmul[2]; ///< luma dc-only block quant
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int16_t chroma_qmul[2];
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} qmat[4];
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struct {
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uint8_t enabled; ///< whether each mb can have a different strength based on mode/ref
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/**
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* filter strength adjustment for the following macroblock modes:
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* [0-3] - i16x16 (always zero)
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* [4] - i4x4
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* [5] - zero mv
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* [6] - inter modes except for zero or split mv
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* [7] - split mv
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* i16x16 modes never have any adjustment
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*/
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int8_t mode[VP8_MVMODE_SPLIT + 1];
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/**
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* filter strength adjustment for macroblocks that reference:
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* [0] - intra / VP56_FRAME_CURRENT
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* [1] - VP56_FRAME_PREVIOUS
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* [2] - VP56_FRAME_GOLDEN
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* [3] - altref / VP56_FRAME_GOLDEN2
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*/
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int8_t ref[4];
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} lf_delta;
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uint8_t (*top_border)[16 + 8 + 8];
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uint8_t (*top_nnz)[9];
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VP56RangeCoder c; ///< header context, includes mb modes and motion vectors
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/**
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* These are all of the updatable probabilities for binary decisions.
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* They are only implictly reset on keyframes, making it quite likely
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* for an interframe to desync if a prior frame's header was corrupt
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* or missing outright!
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*/
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struct {
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uint8_t segmentid[3];
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uint8_t mbskip;
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uint8_t intra;
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uint8_t last;
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uint8_t golden;
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uint8_t pred16x16[4];
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uint8_t pred8x8c[3];
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uint8_t token[4][16][3][NUM_DCT_TOKENS - 1];
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uint8_t mvc[2][19];
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uint8_t scan[16];
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} prob[2];
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VP8Macroblock *macroblocks_base;
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int invisible;
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int update_last; ///< update VP56_FRAME_PREVIOUS with the current one
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int update_golden; ///< VP56_FRAME_NONE if not updated, or which frame to copy if so
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int update_altref;
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/**
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* If this flag is not set, all the probability updates
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* are discarded after this frame is decoded.
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*/
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int update_probabilities;
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/**
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* All coefficients are contained in separate arith coding contexts.
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* There can be 1, 2, 4, or 8 of these after the header context.
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*/
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int num_coeff_partitions;
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VP56RangeCoder coeff_partition[8];
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VideoDSPContext vdsp;
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VP8DSPContext vp8dsp;
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H264PredContext hpc;
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vp8_mc_func put_pixels_tab[3][3][3];
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VP8Frame frames[5];
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uint8_t colorspace; ///< 0 is the only value allowed (meaning bt601)
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uint8_t fullrange; ///< whether we can skip clamping in dsp functions
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int num_jobs;
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/**
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* This describes the macroblock memory layout.
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* 0 -> Only width+height*2+1 macroblocks allocated (frame/single thread).
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* 1 -> Macroblocks for entire frame alloced (sliced thread).
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*/
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int mb_layout;
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void (*decode_mb_row_no_filter)(AVCodecContext *avctx, void *tdata, int jobnr, int threadnr);
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void (*filter_mb_row)(AVCodecContext *avctx, void *tdata, int jobnr, int threadnr);
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int vp7;
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/**
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* Fade bit present in bitstream (VP7)
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*/
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int fade_present;
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/**
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* Interframe DC prediction (VP7)
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* [0] VP56_FRAME_PREVIOUS
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* [1] VP56_FRAME_GOLDEN
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*/
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uint16_t inter_dc_pred[2][2];
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/**
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* Macroblock features (VP7)
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*/
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uint8_t feature_enabled[4];
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uint8_t feature_present_prob[4];
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uint8_t feature_index_prob[4][3];
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uint8_t feature_value[4][4];
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} VP8Context;
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int ff_vp8_decode_init(AVCodecContext *avctx);
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int ff_vp8_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
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AVPacket *avpkt);
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int ff_vp8_decode_free(AVCodecContext *avctx);
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#endif /* AVCODEC_VP8_H */
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