| /* |
| * RV30/40 decoder common data declarations |
| * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file libavcodec/rv34.h |
| * RV30 and RV40 decoder common data declarations |
| */ |
| |
| #ifndef AVCODEC_RV34_H |
| #define AVCODEC_RV34_H |
| |
| #include "avcodec.h" |
| #include "dsputil.h" |
| #include "mpegvideo.h" |
| |
| #include "h264pred.h" |
| |
| #define MB_TYPE_SEPARATE_DC 0x01000000 |
| #define IS_SEPARATE_DC(a) ((a) & MB_TYPE_SEPARATE_DC) |
| |
| /** |
| * RV30 and RV40 Macroblock types |
| */ |
| enum RV40BlockTypes{ |
| RV34_MB_TYPE_INTRA, ///< Intra macroblock |
| RV34_MB_TYPE_INTRA16x16, ///< Intra macroblock with DCs in a separate 4x4 block |
| RV34_MB_P_16x16, ///< P-frame macroblock, one motion frame |
| RV34_MB_P_8x8, ///< P-frame macroblock, 8x8 motion compensation partitions |
| RV34_MB_B_FORWARD, ///< B-frame macroblock, forward prediction |
| RV34_MB_B_BACKWARD, ///< B-frame macroblock, backward prediction |
| RV34_MB_SKIP, ///< Skipped block |
| RV34_MB_B_DIRECT, ///< Bidirectionally predicted B-frame macroblock, no motion vectors |
| RV34_MB_P_16x8, ///< P-frame macroblock, 16x8 motion compensation partitions |
| RV34_MB_P_8x16, ///< P-frame macroblock, 8x16 motion compensation partitions |
| RV34_MB_B_BIDIR, ///< Bidirectionally predicted B-frame macroblock, two motion vectors |
| RV34_MB_P_MIX16x16, ///< P-frame macroblock with DCs in a separate 4x4 block, one motion vector |
| RV34_MB_TYPES |
| }; |
| |
| /** |
| * VLC tables used by the decoder |
| * |
| * Intra frame VLC sets do not contain some of those tables. |
| */ |
| typedef struct RV34VLC{ |
| VLC cbppattern[2]; ///< VLCs used for pattern of coded block patterns decoding |
| VLC cbp[2][4]; ///< VLCs used for coded block patterns decoding |
| VLC first_pattern[4]; ///< VLCs used for decoding coefficients in the first subblock |
| VLC second_pattern[2]; ///< VLCs used for decoding coefficients in the subblocks 2 and 3 |
| VLC third_pattern[2]; ///< VLCs used for decoding coefficients in the last subblock |
| VLC coefficient; ///< VLCs used for decoding big coefficients |
| }RV34VLC; |
| |
| /** essential slice information */ |
| typedef struct SliceInfo{ |
| int type; ///< slice type (intra, inter) |
| int quant; ///< quantizer used for this slice |
| int vlc_set; ///< VLCs used for this slice |
| int start, end; ///< start and end macroblocks of the slice |
| int width; ///< coded width |
| int height; ///< coded height |
| int pts; ///< frame timestamp |
| }SliceInfo; |
| |
| /** decoder context */ |
| typedef struct RV34DecContext{ |
| MpegEncContext s; |
| int8_t *intra_types_hist;///< old block types, used for prediction |
| int8_t *intra_types; ///< block types |
| const uint8_t *luma_dc_quant_i;///< luma subblock DC quantizer for intraframes |
| const uint8_t *luma_dc_quant_p;///< luma subblock DC quantizer for interframes |
| |
| RV34VLC *cur_vlcs; ///< VLC set used for current frame decoding |
| int bits; ///< slice size in bits |
| H264PredContext h; ///< functions for 4x4 and 16x16 intra block prediction |
| SliceInfo si; ///< current slice information |
| |
| int *mb_type; ///< internal macroblock types |
| int block_type; ///< current block type |
| int luma_vlc; ///< which VLC set will be used for decoding of luma blocks |
| int chroma_vlc; ///< which VLC set will be used for decoding of chroma blocks |
| int is16; ///< current block has additional 16x16 specific features or not |
| int dmv[4][2]; ///< differential motion vectors for the current macroblock |
| |
| int rv30; ///< indicates which RV variasnt is currently decoded |
| int rpr; ///< one field size in RV30 slice header |
| |
| int cur_pts, last_pts, next_pts; |
| |
| uint16_t *cbp_luma; ///< CBP values for luma subblocks |
| uint8_t *cbp_chroma; ///< CBP values for chroma subblocks |
| int *deblock_coefs; ///< deblock coefficients for each macroblock |
| |
| /** 8x8 block available flags (for MV prediction) */ |
| DECLARE_ALIGNED_8(uint32_t, avail_cache[3*4]); |
| |
| int (*parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si); |
| int (*decode_mb_info)(struct RV34DecContext *r); |
| int (*decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst); |
| void (*loop_filter)(struct RV34DecContext *r, int row); |
| }RV34DecContext; |
| |
| /** |
| * common decoding functions |
| */ |
| int ff_rv34_get_start_offset(GetBitContext *gb, int blocks); |
| int ff_rv34_decode_init(AVCodecContext *avctx); |
| int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size); |
| int ff_rv34_decode_end(AVCodecContext *avctx); |
| |
| #endif /* AVCODEC_RV34_H */ |