* Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
* Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#ifndef CAVS_H
-#define CAVS_H
+#ifndef AVCODEC_CAVS_H
+#define AVCODEC_CAVS_H
#include "dsputil.h"
+#include "mpegvideo.h"
+#include "cavsdsp.h"
-#define SLICE_MIN_START_CODE 0x00000101
#define SLICE_MAX_START_CODE 0x000001af
#define EXT_START_CODE 0x000001b5
#define USER_START_CODE 0x000001b2
#define MV_BWD_OFFS 12
#define MV_STRIDE 4
-enum mb_t {
+enum cavs_mb {
I_8X8 = 0,
P_SKIP,
P_16X16,
B_8X8 = 29
};
-enum sub_mb_t {
+enum cavs_sub_mb {
B_SUB_DIRECT,
B_SUB_FWD,
B_SUB_BWD,
B_SUB_SYM
};
-enum intra_luma_t {
+enum cavs_intra_luma {
INTRA_L_VERT,
INTRA_L_HORIZ,
INTRA_L_LP,
INTRA_L_DC_128
};
-enum intra_chroma_t {
+enum cavs_intra_chroma {
INTRA_C_LP,
INTRA_C_HORIZ,
INTRA_C_VERT,
INTRA_C_DC_128,
};
-enum mv_pred_t {
+enum cavs_mv_pred {
MV_PRED_MEDIAN,
MV_PRED_LEFT,
MV_PRED_TOP,
MV_PRED_BSKIP
};
-enum block_t {
+enum cavs_block {
BLK_16X16,
BLK_16X8,
BLK_8X16,
BLK_8X8
};
-enum mv_loc_t {
+enum cavs_mv_loc {
MV_FWD_D3 = 0,
MV_FWD_B2,
MV_FWD_B3,
MV_BWD_X3
};
-DECLARE_ALIGNED_8(typedef, struct) {
+DECLARE_ALIGNED(8, typedef, struct) {
int16_t x;
int16_t y;
int16_t dist;
int16_t ref;
-} vector_t;
+} cavs_vector;
-typedef struct residual_vlc_t {
+struct dec_2dvlc {
int8_t rltab[59][3];
int8_t level_add[27];
int8_t golomb_order;
int inc_limit;
int8_t max_run;
-} residual_vlc_t;
+};
+
+typedef struct AVSContext {
+ MpegEncContext s;
+ CAVSDSPContext cdsp;
+ Picture picture; ///< currently decoded frame
+ Picture DPB[2]; ///< reference frames
+ int dist[2]; ///< temporal distances from current frame to ref frames
+ int profile, level;
+ int aspect_ratio;
+ int mb_width, mb_height;
+ int pic_type;
+ int stream_revision; ///<0 for samples from 2006, 1 for rm52j encoder
+ int progressive;
+ int pic_structure;
+ int skip_mode_flag; ///< select between skip_count or one skip_flag per MB
+ int loop_filter_disable;
+ int alpha_offset, beta_offset;
+ int ref_flag;
+ int mbx, mby, mbidx; ///< macroblock coordinates
+ int flags; ///< availability flags of neighbouring macroblocks
+ int stc; ///< last start code
+ uint8_t *cy, *cu, *cv; ///< current MB sample pointers
+ int left_qp;
+ uint8_t *top_qp;
+
+ /** mv motion vector cache
+ 0: D3 B2 B3 C2
+ 4: A1 X0 X1 -
+ 8: A3 X2 X3 -
+
+ X are the vectors in the current macroblock (5,6,9,10)
+ A is the macroblock to the left (4,8)
+ B is the macroblock to the top (1,2)
+ C is the macroblock to the top-right (3)
+ D is the macroblock to the top-left (0)
+
+ the same is repeated for backward motion vectors */
+ cavs_vector mv[2*4*3];
+ cavs_vector *top_mv[2];
+ cavs_vector *col_mv;
+
+ /** luma pred mode cache
+ 0: -- B2 B3
+ 3: A1 X0 X1
+ 6: A3 X2 X3 */
+ int pred_mode_Y[3*3];
+ int *top_pred_Y;
+ int l_stride, c_stride;
+ int luma_scan[4];
+ int qp;
+ int qp_fixed;
+ int cbp;
+ ScanTable scantable;
+
+ /** intra prediction is done with un-deblocked samples
+ they are saved here before deblocking the MB */
+ uint8_t *top_border_y, *top_border_u, *top_border_v;
+ uint8_t left_border_y[26], left_border_u[10], left_border_v[10];
+ uint8_t intern_border_y[26];
+ uint8_t topleft_border_y, topleft_border_u, topleft_border_v;
+
+ void (*intra_pred_l[8])(uint8_t *d,uint8_t *top,uint8_t *left,int stride);
+ void (*intra_pred_c[7])(uint8_t *d,uint8_t *top,uint8_t *left,int stride);
+ uint8_t *col_type_base;
+
+ /* scaling factors for MV prediction */
+ int sym_factor; ///< for scaling in symmetrical B block
+ int direct_den[2]; ///< for scaling in direct B block
+ int scale_den[2]; ///< for scaling neighbouring MVs
+
+ int got_keyframe;
+ DCTELEM *block;
+} AVSContext;
+
+extern const uint8_t ff_cavs_partition_flags[30];
+extern const cavs_vector ff_cavs_intra_mv;
+extern const cavs_vector ff_cavs_dir_mv;
+
+static inline void set_mvs(cavs_vector *mv, enum cavs_block size) {
+ switch(size) {
+ case BLK_16X16:
+ mv[MV_STRIDE ] = mv[0];
+ mv[MV_STRIDE+1] = mv[0];
+ case BLK_16X8:
+ mv[1] = mv[0];
+ break;
+ case BLK_8X16:
+ mv[MV_STRIDE] = mv[0];
+ break;
+ }
+}
+
+void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type);
+void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left,
+ int block);
+void ff_cavs_load_intra_pred_chroma(AVSContext *h);
+void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv);
+void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type);
+void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
+ enum cavs_mv_pred mode, enum cavs_block size, int ref);
+void ff_cavs_init_mb(AVSContext *h);
+int ff_cavs_next_mb(AVSContext *h);
+void ff_cavs_init_pic(AVSContext *h);
+void ff_cavs_init_top_lines(AVSContext *h);
+int ff_cavs_init(AVCodecContext *avctx);
+int ff_cavs_end (AVCodecContext *avctx);
-#endif /* CAVS_H */
+#endif /* AVCODEC_CAVS_H */
projects / ffmpeg / blobdiff