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1f4cf92cfb
The current design, where - proper init is called for the first per-thread context - first thread's private data is copied into private data for all the other threads - a "fixup" function is called for all the other threads to e.g. allocate dynamically allocated data is very fragile and hard to follow, so it is abandoned. Instead, the same init function is used to init each per-thread context. Where necessary, AVCodecInternal.is_copy can be used to differentiate between the first thread and the other ones (e.g. for decoding the extradata just once).
142 lines
5.8 KiB
C
142 lines
5.8 KiB
C
/*
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* RV30/40 decoder common data declarations
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* Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
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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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/**
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* @file
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* RV30 and RV40 decoder common data declarations
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*/
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#ifndef AVCODEC_RV34_H
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#define AVCODEC_RV34_H
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#include "avcodec.h"
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#include "mpegvideo.h"
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#include "h264pred.h"
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#include "rv34dsp.h"
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#define MB_TYPE_SEPARATE_DC 0x01000000
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#define IS_SEPARATE_DC(a) ((a) & MB_TYPE_SEPARATE_DC)
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/**
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* RV30 and RV40 Macroblock types
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*/
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enum RV40BlockTypes{
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RV34_MB_TYPE_INTRA, ///< Intra macroblock
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RV34_MB_TYPE_INTRA16x16, ///< Intra macroblock with DCs in a separate 4x4 block
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RV34_MB_P_16x16, ///< P-frame macroblock, one motion frame
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RV34_MB_P_8x8, ///< P-frame macroblock, 8x8 motion compensation partitions
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RV34_MB_B_FORWARD, ///< B-frame macroblock, forward prediction
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RV34_MB_B_BACKWARD, ///< B-frame macroblock, backward prediction
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RV34_MB_SKIP, ///< Skipped block
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RV34_MB_B_DIRECT, ///< Bidirectionally predicted B-frame macroblock, no motion vectors
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RV34_MB_P_16x8, ///< P-frame macroblock, 16x8 motion compensation partitions
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RV34_MB_P_8x16, ///< P-frame macroblock, 8x16 motion compensation partitions
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RV34_MB_B_BIDIR, ///< Bidirectionally predicted B-frame macroblock, two motion vectors
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RV34_MB_P_MIX16x16, ///< P-frame macroblock with DCs in a separate 4x4 block, one motion vector
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RV34_MB_TYPES
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};
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/**
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* VLC tables used by the decoder
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*
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* Intra frame VLC sets do not contain some of those tables.
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*/
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typedef struct RV34VLC{
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VLC cbppattern[2]; ///< VLCs used for pattern of coded block patterns decoding
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VLC cbp[2][4]; ///< VLCs used for coded block patterns decoding
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VLC first_pattern[4]; ///< VLCs used for decoding coefficients in the first subblock
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VLC second_pattern[2]; ///< VLCs used for decoding coefficients in the subblocks 2 and 3
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VLC third_pattern[2]; ///< VLCs used for decoding coefficients in the last subblock
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VLC coefficient; ///< VLCs used for decoding big coefficients
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}RV34VLC;
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/** essential slice information */
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typedef struct SliceInfo{
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int type; ///< slice type (intra, inter)
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int quant; ///< quantizer used for this slice
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int vlc_set; ///< VLCs used for this slice
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int start, end; ///< start and end macroblocks of the slice
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int width; ///< coded width
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int height; ///< coded height
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int pts; ///< frame timestamp
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}SliceInfo;
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/** decoder context */
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typedef struct RV34DecContext{
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MpegEncContext s;
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RV34DSPContext rdsp;
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int8_t *intra_types_hist;///< old block types, used for prediction
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int8_t *intra_types; ///< block types
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int intra_types_stride;///< block types array stride
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const uint8_t *luma_dc_quant_i;///< luma subblock DC quantizer for intraframes
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const uint8_t *luma_dc_quant_p;///< luma subblock DC quantizer for interframes
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RV34VLC *cur_vlcs; ///< VLC set used for current frame decoding
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H264PredContext h; ///< functions for 4x4 and 16x16 intra block prediction
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SliceInfo si; ///< current slice information
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int *mb_type; ///< internal macroblock types
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int block_type; ///< current block type
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int luma_vlc; ///< which VLC set will be used for decoding of luma blocks
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int chroma_vlc; ///< which VLC set will be used for decoding of chroma blocks
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int is16; ///< current block has additional 16x16 specific features or not
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int dmv[4][2]; ///< differential motion vectors for the current macroblock
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int rv30; ///< indicates which RV variant is currently decoded
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int max_rpr;
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int cur_pts, last_pts, next_pts;
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int scaled_weight;
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int weight1, weight2; ///< B-frame distance fractions (0.14) used in motion compensation
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int mv_weight1, mv_weight2;
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int orig_width, orig_height;
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uint16_t *cbp_luma; ///< CBP values for luma subblocks
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uint8_t *cbp_chroma; ///< CBP values for chroma subblocks
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uint16_t *deblock_coefs; ///< deblock coefficients for each macroblock
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/** 8x8 block available flags (for MV prediction) */
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DECLARE_ALIGNED(8, uint32_t, avail_cache)[3*4];
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/** temporary blocks for RV4 weighted MC */
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uint8_t *tmp_b_block_y[2];
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uint8_t *tmp_b_block_uv[4];
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uint8_t *tmp_b_block_base;
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int (*parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si);
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int (*decode_mb_info)(struct RV34DecContext *r);
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int (*decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst);
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void (*loop_filter)(struct RV34DecContext *r, int row);
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}RV34DecContext;
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/**
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* common decoding functions
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*/
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int ff_rv34_get_start_offset(GetBitContext *gb, int blocks);
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int ff_rv34_decode_init(AVCodecContext *avctx);
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int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt);
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int ff_rv34_decode_end(AVCodecContext *avctx);
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int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
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#endif /* AVCODEC_RV34_H */
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