From a52ef6a894ede214162cd9e95685daa5e656e2f7 Mon Sep 17 00:00:00 2001 From: Kostya Shishkov Date: Sun, 16 Dec 2007 12:44:25 +0000 Subject: RV30/40 decoding core Originally committed as revision 11229 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/rv34.h | 119 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 119 insertions(+) create mode 100644 libavcodec/rv34.h (limited to 'libavcodec/rv34.h') diff --git a/libavcodec/rv34.h b/libavcodec/rv34.h new file mode 100644 index 0000000000..0aa5911d5c --- /dev/null +++ b/libavcodec/rv34.h @@ -0,0 +1,119 @@ +/* + * 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 rv34.h + * RV30 and RV40 decoder common data declarations + */ + +#ifndef FFMPEG_RV34_H +#define FFMPEG_RV34_H + +#include "avcodec.h" +#include "dsputil.h" +#include "mpegvideo.h" + +#include "h264pred.h" + +/** + * 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 +}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 + uint8_t *luma_dc_quant_i;///< luma subblock DC quantizer for intraframes + 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 + + /** 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); +}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, uint8_t *buf, int buf_size); +int ff_rv34_decode_end(AVCodecContext *avctx); + +#endif /* FFMPEG_RV34_H */ -- cgit v1.2.3