ffmpeg/libavcodec/mpegutils.h

   1 /*
   2  * Mpeg video formats-related defines and utility functions
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef AVCODEC_MPEGUTILS_H
  22 #define AVCODEC_MPEGUTILS_H
  23
  24 #include <stdint.h>
  25
  26 #include "libavutil/frame.h"
  27
  28 #include "avcodec.h"
  29 #include "version.h"
  30
  31
  32 /* picture type */
  33 #define PICT_TOP_FIELD     1
  34 #define PICT_BOTTOM_FIELD  2
  35 #define PICT_FRAME         3
  36
  37 /**
  38  * Value of Picture.reference when Picture is not a reference picture, but
  39  * is held for delayed output.
  40  */
  41 #define DELAYED_PIC_REF 4
  42
  43
  44 /* MB types */
  45 #if !FF_API_MB_TYPE
  46 #define MB_TYPE_INTRA4x4   (1 <<  0)
  47 #define MB_TYPE_INTRA16x16 (1 <<  1) // FIXME H.264-specific
  48 #define MB_TYPE_INTRA_PCM  (1 <<  2) // FIXME H.264-specific
  49 #define MB_TYPE_16x16      (1 <<  3)
  50 #define MB_TYPE_16x8       (1 <<  4)
  51 #define MB_TYPE_8x16       (1 <<  5)
  52 #define MB_TYPE_8x8        (1 <<  6)
  53 #define MB_TYPE_INTERLACED (1 <<  7)
  54 #define MB_TYPE_DIRECT2    (1 <<  8) // FIXME
  55 #define MB_TYPE_ACPRED     (1 <<  9)
  56 #define MB_TYPE_GMC        (1 << 10)
  57 #define MB_TYPE_SKIP       (1 << 11)
  58 #define MB_TYPE_P0L0       (1 << 12)
  59 #define MB_TYPE_P1L0       (1 << 13)
  60 #define MB_TYPE_P0L1       (1 << 14)
  61 #define MB_TYPE_P1L1       (1 << 15)
  62 #define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
  63 #define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
  64 #define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
  65 #define MB_TYPE_QUANT      (1 << 16)
  66 #define MB_TYPE_CBP        (1 << 17)
  67 #endif
  68
  69 #define MB_TYPE_INTRA    MB_TYPE_INTRA4x4 // default mb_type if there is just one type
  70
  71 #define IS_INTRA4x4(a)   ((a) & MB_TYPE_INTRA4x4)
  72 #define IS_INTRA16x16(a) ((a) & MB_TYPE_INTRA16x16)
  73 #define IS_PCM(a)        ((a) & MB_TYPE_INTRA_PCM)
  74 #define IS_INTRA(a)      ((a) & 7)
  75 #define IS_INTER(a)      ((a) & (MB_TYPE_16x16 | MB_TYPE_16x8 | \
  76                                  MB_TYPE_8x16  | MB_TYPE_8x8))
  77 #define IS_SKIP(a)       ((a) & MB_TYPE_SKIP)
  78 #define IS_INTRA_PCM(a)  ((a) & MB_TYPE_INTRA_PCM)
  79 #define IS_INTERLACED(a) ((a) & MB_TYPE_INTERLACED)
  80 #define IS_DIRECT(a)     ((a) & MB_TYPE_DIRECT2)
  81 #define IS_GMC(a)        ((a) & MB_TYPE_GMC)
  82 #define IS_16X16(a)      ((a) & MB_TYPE_16x16)
  83 #define IS_16X8(a)       ((a) & MB_TYPE_16x8)
  84 #define IS_8X16(a)       ((a) & MB_TYPE_8x16)
  85 #define IS_8X8(a)        ((a) & MB_TYPE_8x8)
  86 #define IS_SUB_8X8(a)    ((a) & MB_TYPE_16x16) // note reused
  87 #define IS_SUB_8X4(a)    ((a) & MB_TYPE_16x8)  // note reused
  88 #define IS_SUB_4X8(a)    ((a) & MB_TYPE_8x16)  // note reused
  89 #define IS_SUB_4X4(a)    ((a) & MB_TYPE_8x8)   // note reused
  90 #define IS_ACPRED(a)     ((a) & MB_TYPE_ACPRED)
  91 #define IS_QUANT(a)      ((a) & MB_TYPE_QUANT)
  92 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0 << ((part) + 2 * (list))))
  93
  94 // does this mb use listX, note does not work if subMBs
  95 #define USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0 | MB_TYPE_P1L0) << (2 * (list))))
  96
  97 #define HAS_CBP(a)       ((a) & MB_TYPE_CBP)
  98
  99 /* MB types for encoding */
 100 #define CANDIDATE_MB_TYPE_INTRA      (1 <<  0)
 101 #define CANDIDATE_MB_TYPE_INTER      (1 <<  1)
 102 #define CANDIDATE_MB_TYPE_INTER4V    (1 <<  2)
 103 #define CANDIDATE_MB_TYPE_SKIPPED    (1 <<  3)
 104
 105 #define CANDIDATE_MB_TYPE_DIRECT     (1 <<  4)
 106 #define CANDIDATE_MB_TYPE_FORWARD    (1 <<  5)
 107 #define CANDIDATE_MB_TYPE_BACKWARD   (1 <<  6)
 108 #define CANDIDATE_MB_TYPE_BIDIR      (1 <<  7)
 109
 110 #define CANDIDATE_MB_TYPE_INTER_I    (1 <<  8)
 111 #define CANDIDATE_MB_TYPE_FORWARD_I  (1 <<  9)
 112 #define CANDIDATE_MB_TYPE_BACKWARD_I (1 << 10)
 113 #define CANDIDATE_MB_TYPE_BIDIR_I    (1 << 11)
 114
 115 #define CANDIDATE_MB_TYPE_DIRECT0    (1 << 12)
 116
 117
 118 /**
 119  * Draw a horizontal band if supported.
 120  *
 121  * @param h is the normal height, this will be reduced automatically if needed
 122  */
 123 void ff_draw_horiz_band(AVCodecContext *avctx, AVFrame *cur, AVFrame *last,
 124                         int y, int h, int picture_structure, int first_field,
 125                         int low_delay);
 126
 127 #endif /* AVCODEC_PICTTYPE_H */