media/ffvpx/libavcodec/error_resilience.h

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #ifndef AVCODEC_ERROR_RESILIENCE_H
  20 #define AVCODEC_ERROR_RESILIENCE_H
  21
  22 #include <stdint.h>
  23 #include <stdatomic.h>
  24
  25 #include "avcodec.h"
  26 #include "me_cmp.h"
  27
  28 ///< current MB is the first after a resync marker
  29 #define VP_START               1
  30 #define ER_AC_ERROR            2
  31 #define ER_DC_ERROR            4
  32 #define ER_MV_ERROR            8
  33 #define ER_AC_END              16
  34 #define ER_DC_END              32
  35 #define ER_MV_END              64
  36
  37 #define ER_MB_ERROR (ER_AC_ERROR|ER_DC_ERROR|ER_MV_ERROR)
  38 #define ER_MB_END   (ER_AC_END|ER_DC_END|ER_MV_END)
  39
  40 typedef struct ERPicture {
  41     AVFrame *f;
  42     const struct ThreadFrame *tf;
  43
  44     // it is the caller's responsibility to allocate these buffers
  45     int16_t (*motion_val[2])[2];
  46     int8_t *ref_index[2];
  47
  48     uint32_t *mb_type;
  49     int field_picture;
  50 } ERPicture;
  51
  52 typedef struct ERContext {
  53     AVCodecContext *avctx;
  54
  55     me_cmp_func sad;
  56     int mecc_inited;
  57
  58     int *mb_index2xy;
  59     int mb_num;
  60     int mb_width, mb_height;
  61     ptrdiff_t mb_stride;
  62     ptrdiff_t b8_stride;
  63
  64     atomic_int error_count;
  65     int error_occurred;
  66     uint8_t *error_status_table;
  67     uint8_t *er_temp_buffer;
  68     int16_t *dc_val[3];
  69     uint8_t *mbskip_table;
  70     uint8_t *mbintra_table;
  71     int mv[2][4][2];
  72
  73     ERPicture cur_pic;
  74     ERPicture last_pic;
  75     ERPicture next_pic;
  76
  77     int8_t *ref_index[2];
  78     int16_t (*motion_val_base[2])[2];
  79
  80     uint16_t pp_time;
  81     uint16_t pb_time;
  82     int quarter_sample;
  83     int partitioned_frame;
  84
  85     void (*decode_mb)(void *opaque, int ref, int mv_dir, int mv_type,
  86                       int (*mv)[2][4][2],
  87                       int mb_x, int mb_y, int mb_intra, int mb_skipped);
  88     void *opaque;
  89 } ERContext;
  90
  91 void ff_er_frame_start(ERContext *s);
  92
  93 /**
  94  * Indicate that a frame has finished decoding and perform error concealment
  95  * in case it has been enabled and is necessary and supported.
  96  *
  97  * @param s                  ERContext in use
  98  * @param decode_error_flags pointer where updated decode_error_flags are written
  99  *                           if supplied; if not, the new flags are directly
 100  *                           applied to the AVFrame whose errors are concealed
 101  */
 102 void ff_er_frame_end(ERContext *s, int *decode_error_flags);
 103 void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy,
 104                      int status);
 105
 106 #endif /* AVCODEC_ERROR_RESILIENCE_H */