* 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 {
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 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; ///< macroblock coordinates
+ 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
D is the macroblock to the top-left (0)
the same is repeated for backward motion vectors */
- vector_t mv[2*4*3];
- vector_t *top_mv[2];
- vector_t *col_mv;
+ cavs_vector mv[2*4*3];
+ cavs_vector *top_mv[2];
+ cavs_vector *col_mv;
/** luma pred mode cache
0: -- B2 B3
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;
- uint8_t *col_type;
/* scaling factors for MV prediction */
int sym_factor; ///< for scaling in symmetrical B block
DCTELEM *block;
} AVSContext;
-#endif /* CAVS_H */
+extern const uint8_t ff_cavs_dequant_shift[64];
+extern const uint16_t ff_cavs_dequant_mul[64];
+extern const struct dec_2dvlc ff_cavs_intra_dec[7];
+extern const struct dec_2dvlc ff_cavs_inter_dec[7];
+extern const struct dec_2dvlc ff_cavs_chroma_dec[5];
+extern const uint8_t ff_cavs_chroma_qp[64];
+extern const uint8_t ff_cavs_scan3x3[4];
+extern const uint8_t ff_cavs_partition_flags[30];
+extern const int8_t ff_left_modifier_l[8];
+extern const int8_t ff_top_modifier_l[8];
+extern const int8_t ff_left_modifier_c[7];
+extern const int8_t ff_top_modifier_c[7];
+extern const cavs_vector ff_cavs_intra_mv;
+extern const cavs_vector ff_cavs_un_mv;
+extern const cavs_vector ff_cavs_dir_mv;
+
+static inline void modify_pred(const int8_t *mod_table, int *mode)
+{
+ *mode = mod_table[*mode];
+ if(*mode < 0) {
+ av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");
+ *mode = 0;
+ }
+}
+
+static inline void set_intra_mode_default(AVSContext *h) {
+ if(h->stream_revision > 0) {
+ h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
+ h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = NOT_AVAIL;
+ } else {
+ h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP;
+ h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = INTRA_L_LP;
+ }
+}
+
+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;
+ }
+}
+
+static inline void set_mv_intra(AVSContext *h) {
+ h->mv[MV_FWD_X0] = ff_cavs_intra_mv;
+ set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
+ h->mv[MV_BWD_X0] = ff_cavs_intra_mv;
+ set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
+ if(h->pic_type != AV_PICTURE_TYPE_B)
+ h->col_type_base[h->mbidx] = I_8X8;
+}
+
+static inline int dequant(AVSContext *h, DCTELEM *level_buf, uint8_t *run_buf,
+ DCTELEM *dst, int mul, int shift, int coeff_num) {
+ int round = 1 << (shift - 1);
+ int pos = -1;
+ const uint8_t *scantab = h->scantable.permutated;
+
+ /* inverse scan and dequantization */
+ while(--coeff_num >= 0){
+ pos += run_buf[coeff_num];
+ if(pos > 63) {
+ av_log(h->s.avctx, AV_LOG_ERROR,
+ "position out of block bounds at pic %d MB(%d,%d)\n",
+ h->picture.poc, h->mbx, h->mby);
+ return -1;
+ }
+ dst[scantab[pos]] = (level_buf[coeff_num]*mul + round) >> shift;
+ }
+ return 0;
+}
+
+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 /* AVCODEC_CAVS_H */
projects / ffmpeg / blobdiff