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
25 #include "libavutil/mem_internal.h"
29 #include "h264chroma.h"
34 #define SLICE_MAX_START_CODE 0x000001af
35 #define EXT_START_CODE 0x000001b5
36 #define USER_START_CODE 0x000001b2
37 #define CAVS_START_CODE 0x000001b0
38 #define PIC_I_START_CODE 0x000001b3
39 #define PIC_PB_START_CODE 0x000001b6
49 #define ESCAPE_CODE 59
60 #define MV_BWD_OFFS 12
85 enum cavs_intra_luma {
96 enum cavs_intra_chroma {
133 MV_BWD_D3 = MV_BWD_OFFS,
140 MV_BWD_A3 = MV_BWD_OFFS+8,
145 DECLARE_ALIGNED(8, typedef, struct) {
154 int8_t level_add[27];
160 typedef struct AVSFrame {
165 typedef struct AVSContext {
166 AVCodecContext *avctx;
167 BlockDSPContext bdsp;
168 H264ChromaContext h264chroma;
170 VideoDSPContext vdsp;
173 AVSFrame cur; ///< currently decoded frame
174 AVSFrame DPB[2]; ///< reference frames
175 int dist[2]; ///< temporal distances from current frame to ref frames
179 int mb_width, mb_height;
181 int stream_revision; ///<0 for samples from 2006, 1 for rm52j encoder
184 int skip_mode_flag; ///< select between skip_count or one skip_flag per MB
185 int loop_filter_disable;
186 int alpha_offset, beta_offset;
188 int mbx, mby, mbidx; ///< macroblock coordinates
189 int flags; ///< availability flags of neighbouring macroblocks
190 int stc; ///< last start code
191 uint8_t *cy, *cu, *cv; ///< current MB sample pointers
195 /** mv motion vector cache
200 X are the vectors in the current macroblock (5,6,9,10)
201 A is the macroblock to the left (4,8)
202 B is the macroblock to the top (1,2)
203 C is the macroblock to the top-right (3)
204 D is the macroblock to the top-left (0)
206 the same is repeated for backward motion vectors */
207 cavs_vector mv[2*4*3];
208 cavs_vector *top_mv[2];
211 /** luma pred mode cache
215 int pred_mode_Y[3*3];
217 ptrdiff_t l_stride, c_stride;
225 /** intra prediction is done with un-deblocked samples
226 they are saved here before deblocking the MB */
227 uint8_t *top_border_y, *top_border_u, *top_border_v;
228 uint8_t left_border_y[26], left_border_u[10], left_border_v[10];
229 uint8_t intern_border_y[26];
230 uint8_t topleft_border_y, topleft_border_u, topleft_border_v;
232 void (*intra_pred_l[8])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride);
233 void (*intra_pred_c[7])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride);
234 uint8_t *col_type_base;
236 /* scaling factors for MV prediction */
237 int sym_factor; ///< for scaling in symmetrical B block
238 int direct_den[2]; ///< for scaling in direct B block
239 int scale_den[2]; ///< for scaling neighbouring MVs
241 uint8_t *edge_emu_buffer;
247 extern const uint8_t ff_cavs_chroma_qp[64];
248 extern const uint8_t ff_cavs_partition_flags[30];
249 extern const cavs_vector ff_cavs_intra_mv;
250 extern const cavs_vector ff_cavs_dir_mv;
252 static inline void set_mvs(cavs_vector *mv, enum cavs_block size) {
255 mv[MV_STRIDE ] = mv[0];
256 mv[MV_STRIDE+1] = mv[0];
261 mv[MV_STRIDE] = mv[0];
266 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type);
267 void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left,
269 void ff_cavs_load_intra_pred_chroma(AVSContext *h);
270 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv);
271 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type);
272 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
273 enum cavs_mv_pred mode, enum cavs_block size, int ref);
274 void ff_cavs_init_mb(AVSContext *h);
275 int ff_cavs_next_mb(AVSContext *h);
276 int ff_cavs_init_pic(AVSContext *h);
277 int ff_cavs_init_top_lines(AVSContext *h);
278 int ff_cavs_init(AVCodecContext *avctx);
279 int ff_cavs_end (AVCodecContext *avctx);
281 #endif /* AVCODEC_CAVS_H */