2 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
3 * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #ifndef AVCODEC_CAVS_H
23 #define AVCODEC_CAVS_H
30 #define SLICE_MAX_START_CODE 0x000001af
31 #define EXT_START_CODE 0x000001b5
32 #define USER_START_CODE 0x000001b2
33 #define CAVS_START_CODE 0x000001b0
34 #define PIC_I_START_CODE 0x000001b3
35 #define PIC_PB_START_CODE 0x000001b6
45 #define ESCAPE_CODE 59
56 #define MV_BWD_OFFS 12
81 enum cavs_intra_luma {
92 enum cavs_intra_chroma {
129 MV_BWD_D3 = MV_BWD_OFFS,
136 MV_BWD_A3 = MV_BWD_OFFS+8,
141 DECLARE_ALIGNED(8, typedef, struct) {
150 int8_t level_add[27];
156 typedef struct AVSFrame {
161 typedef struct AVSContext {
162 AVCodecContext *avctx;
164 VideoDSPContext vdsp;
167 AVSFrame cur; ///< currently decoded frame
168 AVSFrame DPB[2]; ///< reference frames
169 int dist[2]; ///< temporal distances from current frame to ref frames
173 int mb_width, mb_height;
175 int stream_revision; ///<0 for samples from 2006, 1 for rm52j encoder
178 int skip_mode_flag; ///< select between skip_count or one skip_flag per MB
179 int loop_filter_disable;
180 int alpha_offset, beta_offset;
182 int mbx, mby, mbidx; ///< macroblock coordinates
183 int flags; ///< availability flags of neighbouring macroblocks
184 int stc; ///< last start code
185 uint8_t *cy, *cu, *cv; ///< current MB sample pointers
189 /** mv motion vector cache
194 X are the vectors in the current macroblock (5,6,9,10)
195 A is the macroblock to the left (4,8)
196 B is the macroblock to the top (1,2)
197 C is the macroblock to the top-right (3)
198 D is the macroblock to the top-left (0)
200 the same is repeated for backward motion vectors */
201 cavs_vector mv[2*4*3];
202 cavs_vector *top_mv[2];
205 /** luma pred mode cache
209 int pred_mode_Y[3*3];
211 int l_stride, c_stride;
218 /** intra prediction is done with un-deblocked samples
219 they are saved here before deblocking the MB */
220 uint8_t *top_border_y, *top_border_u, *top_border_v;
221 uint8_t left_border_y[26], left_border_u[10], left_border_v[10];
222 uint8_t intern_border_y[26];
223 uint8_t topleft_border_y, topleft_border_u, topleft_border_v;
225 void (*intra_pred_l[8])(uint8_t *d,uint8_t *top,uint8_t *left,int stride);
226 void (*intra_pred_c[7])(uint8_t *d,uint8_t *top,uint8_t *left,int stride);
227 uint8_t *col_type_base;
229 /* scaling factors for MV prediction */
230 int sym_factor; ///< for scaling in symmetrical B block
231 int direct_den[2]; ///< for scaling in direct B block
232 int scale_den[2]; ///< for scaling neighbouring MVs
234 uint8_t *edge_emu_buffer;
240 extern const uint8_t ff_cavs_partition_flags[30];
241 extern const cavs_vector ff_cavs_intra_mv;
242 extern const cavs_vector ff_cavs_dir_mv;
244 static inline void set_mvs(cavs_vector *mv, enum cavs_block size) {
247 mv[MV_STRIDE ] = mv[0];
248 mv[MV_STRIDE+1] = mv[0];
253 mv[MV_STRIDE] = mv[0];
258 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type);
259 void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left,
261 void ff_cavs_load_intra_pred_chroma(AVSContext *h);
262 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv);
263 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type);
264 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
265 enum cavs_mv_pred mode, enum cavs_block size, int ref);
266 void ff_cavs_init_mb(AVSContext *h);
267 int ff_cavs_next_mb(AVSContext *h);
268 int ff_cavs_init_pic(AVSContext *h);
269 void ff_cavs_init_top_lines(AVSContext *h);
270 int ff_cavs_init(AVCodecContext *avctx);
271 int ff_cavs_end (AVCodecContext *avctx);
273 #endif /* AVCODEC_CAVS_H */