FFmpeg
mpegutils.h
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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 
30 /* picture type */
31 #define PICT_TOP_FIELD 1
32 #define PICT_BOTTOM_FIELD 2
33 #define PICT_FRAME 3
34 
35 #define MAX_MB_BYTES (30 * 16 * 16 * 3 / 8 + 120)
36 #define MAX_FCODE 7
37 
38 /* MB types */
39 #define MB_TYPE_INTRA4x4 (1 << 0)
40 #define MB_TYPE_INTRA16x16 (1 << 1) // FIXME H.264-specific
41 #define MB_TYPE_INTRA_PCM (1 << 2) // FIXME H.264-specific
42 #define MB_TYPE_16x16 (1 << 3)
43 #define MB_TYPE_16x8 (1 << 4)
44 #define MB_TYPE_8x16 (1 << 5)
45 #define MB_TYPE_8x8 (1 << 6)
46 #define MB_TYPE_INTERLACED (1 << 7)
47 #define MB_TYPE_DIRECT2 (1 << 8) // FIXME
48 #define MB_TYPE_CBP (1 << 10)
49 #define MB_TYPE_QUANT (1 << 11)
50 #define MB_TYPE_FORWARD_MV (1 << 12)
51 #define MB_TYPE_BACKWARD_MV (1 << 13)
52 #define MB_TYPE_BIDIR_MV (MB_TYPE_FORWARD_MV | MB_TYPE_BACKWARD_MV)
53 // MB_TYPE_P[01]L[01], MB_TYPE_L[01] and MB_TYPE_L0L1 are H.264 only.
54 #define MB_TYPE_P0L0 (1 << 12)
55 #define MB_TYPE_P1L0 (1 << 13)
56 #define MB_TYPE_P0L1 (1 << 14)
57 #define MB_TYPE_P1L1 (1 << 15)
58 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
59 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
60 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
61 #define MB_TYPE_GMC (1 << 16)
62 #define MB_TYPE_SKIP (1 << 17)
63 #define MB_TYPE_ACPRED (1 << 18)
64 
65 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 // default mb_type if there is just one type
66 
67 // The following MB-type can be used by each codec as it sees fit.
68 #define MB_TYPE_CODEC_SPECIFIC (1 << 9)
69 
70 #define IS_INTRA4x4(a) ((a) & MB_TYPE_INTRA4x4)
71 #define IS_INTRA16x16(a) ((a) & MB_TYPE_INTRA16x16)
72 #define IS_PCM(a) ((a) & MB_TYPE_INTRA_PCM)
73 #define IS_INTRA(a) ((a) & 7)
74 #define IS_INTER(a) ((a) & (MB_TYPE_16x16 | MB_TYPE_16x8 | \
75  MB_TYPE_8x16 | MB_TYPE_8x8))
76 #define IS_SKIP(a) ((a) & MB_TYPE_SKIP)
77 #define IS_INTRA_PCM(a) ((a) & MB_TYPE_INTRA_PCM)
78 #define IS_INTERLACED(a) ((a) & MB_TYPE_INTERLACED)
79 #define IS_DIRECT(a) ((a) & MB_TYPE_DIRECT2)
80 #define IS_GMC(a) ((a) & MB_TYPE_GMC)
81 #define IS_16X16(a) ((a) & MB_TYPE_16x16)
82 #define IS_16X8(a) ((a) & MB_TYPE_16x8)
83 #define IS_8X16(a) ((a) & MB_TYPE_8x16)
84 #define IS_8X8(a) ((a) & MB_TYPE_8x8)
85 #define IS_ACPRED(a) ((a) & MB_TYPE_ACPRED)
86 #define IS_QUANT(a) ((a) & MB_TYPE_QUANT)
87 
88 #define HAS_CBP(a) ((a) & MB_TYPE_CBP)
89 #define HAS_FORWARD_MV(a) ((a) & MB_TYPE_FORWARD_MV)
90 #define HAS_BACKWARD_MV(a) ((a) & MB_TYPE_BACKWARD_MV)
91 // dir == 0 means forward, dir == 1 is backward
92 #define HAS_MV(a, dir) ((a) & (MB_TYPE_FORWARD_MV << (dir)))
93 
94 #define MB_TYPE_MV_2_MV_DIR(a) (((a) >> 12) & (MV_DIR_FORWARD | MV_DIR_BACKWARD))
95 
96 /**
97  * Draw a horizontal band if supported.
98  *
99  * @param h is the normal height, this will be reduced automatically if needed
100  */
101 void ff_draw_horiz_band(AVCodecContext *avctx, const AVFrame *cur, const AVFrame *last,
102  int y, int h, int picture_structure, int first_field,
103  int low_delay);
104 
105 /**
106  * Print debugging info for the given picture.
107  */
108 void ff_print_debug_info2(AVCodecContext *avctx, AVFrame *pict,
109  const uint32_t *mbtype_table,
110  const int8_t *qscale_table, int16_t (*const motion_val[2])[2],
111  int mb_width, int mb_height, int mb_stride, int quarter_sample);
112 
113 #endif /* AVCODEC_MPEGUTILS_H */
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:374
ff_print_debug_info2
void ff_print_debug_info2(AVCodecContext *avctx, AVFrame *pict, const uint32_t *mbtype_table, const int8_t *qscale_table, int16_t(*const motion_val[2])[2], int mb_width, int mb_height, int mb_stride, int quarter_sample)
Print debugging info for the given picture.
Definition: mpegutils.c:155
ff_draw_horiz_band
void ff_draw_horiz_band(AVCodecContext *avctx, const AVFrame *cur, const AVFrame *last, int y, int h, int picture_structure, int first_field, int low_delay)
Draw a horizontal band if supported.
Definition: mpegutils.c:54
frame.h
avcodec.h
AVCodecContext
main external API structure.
Definition: avcodec.h:445
h
h
Definition: vp9dsp_template.c:2038
first_field
static int first_field(const struct video_data *s)
Definition: v4l2.c:247