GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/dv.h Lines: 13 13 100.0 %
Date: 2019-11-22 03:34:36 Branches: 12 14 85.7 %

Line Branch Exec Source
1
/*
2
 * Constants for DV codec
3
 * Copyright (c) 2002 Fabrice Bellard
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21
22
/**
23
 * @file
24
 * Constants for DV codec.
25
 */
26
27
#ifndef AVCODEC_DV_H
28
#define AVCODEC_DV_H
29
30
#include "avcodec.h"
31
#include "dv_profile.h"
32
#include "me_cmp.h"
33
#include "vlc.h"
34
#include "idctdsp.h"
35
36
typedef struct DVwork_chunk {
37
    uint16_t buf_offset;
38
    uint16_t mb_coordinates[5];
39
} DVwork_chunk;
40
41
typedef struct DVVideoContext {
42
    AVClass *avclass;
43
    const AVDVProfile *sys;
44
    const AVFrame   *frame;
45
    AVCodecContext  *avctx;
46
    uint8_t         *buf;
47
48
    uint8_t dv_zigzag[2][64];
49
50
    void (*get_pixels)(int16_t *block, const uint8_t *pixels, ptrdiff_t linesize);
51
    void (*fdct[2])(int16_t *block);
52
    void (*idct_put[2])(uint8_t *dest, ptrdiff_t stride, int16_t *block);
53
    me_cmp_func ildct_cmp;
54
    DVwork_chunk work_chunks[4 * 12 * 27];
55
    uint32_t idct_factor[2 * 4 * 16 * 64];
56
    IDCTDSPContext idsp;
57
58
    int quant_deadzone;
59
} DVVideoContext;
60
61
enum dv_section_type {
62
    dv_sect_header  = 0x1f,
63
    dv_sect_subcode = 0x3f,
64
    dv_sect_vaux    = 0x56,
65
    dv_sect_audio   = 0x76,
66
    dv_sect_video   = 0x96,
67
};
68
69
enum dv_pack_type {
70
    dv_header525     = 0x3f,  /* see dv_write_pack for important details on */
71
    dv_header625     = 0xbf,  /* these two packs */
72
    dv_timecode      = 0x13,
73
    dv_audio_source  = 0x50,
74
    dv_audio_control = 0x51,
75
    dv_audio_recdate = 0x52,
76
    dv_audio_rectime = 0x53,
77
    dv_video_source  = 0x60,
78
    dv_video_control = 0x61,
79
    dv_video_recdate = 0x62,
80
    dv_video_rectime = 0x63,
81
    dv_unknown_pack  = 0xff,
82
};
83
84
#define DV_PROFILE_IS_HD(p) ((p)->video_stype & 0x10)
85
#define DV_PROFILE_IS_1080i50(p) (((p)->video_stype == 0x14) && ((p)->dsf == 1))
86
#define DV_PROFILE_IS_1080i60(p) (((p)->video_stype == 0x14) && ((p)->dsf == 0))
87
#define DV_PROFILE_IS_720p50(p)  (((p)->video_stype == 0x18) && ((p)->dsf == 1))
88
89
/**
90
 * largest possible DV frame, in bytes (1080i50)
91
 */
92
#define DV_MAX_FRAME_SIZE 576000
93
94
/**
95
 * maximum number of blocks per macroblock in any DV format
96
 */
97
#define DV_MAX_BPM 8
98
99
#define TEX_VLC_BITS 10
100
101
extern RL_VLC_ELEM ff_dv_rl_vlc[1664];
102
103
int ff_dv_init_dynamic_tables(DVVideoContext *s, const AVDVProfile *d);
104
105
int ff_dvvideo_init(AVCodecContext *avctx);
106
107
1996
static inline int dv_work_pool_size(const AVDVProfile *d)
108
{
109
1996
    int size = d->n_difchan * d->difseg_size * 27;
110

1996
    if (DV_PROFILE_IS_1080i50(d))
111
404
        size -= 3 * 27;
112

1996
    if (DV_PROFILE_IS_720p50(d))
113
404
        size -= 4 * 27;
114
1996
    return size;
115
}
116
117
6028020
static inline void dv_calculate_mb_xy(DVVideoContext *s,
118
                                      DVwork_chunk *work_chunk,
119
                                      int m, int *mb_x, int *mb_y)
120
{
121
6028020
    *mb_x = work_chunk->mb_coordinates[m] & 0xff;
122
6028020
    *mb_y = work_chunk->mb_coordinates[m] >> 8;
123
124
    /* We work with 720p frames split in half.
125
     * The odd half-frame (chan == 2,3) is displaced :-( */
126

6028020
    if (s->sys->height == 720 && !(s->buf[1] & 0x0C))
127
        /* shifting the Y coordinate down by 72/2 macro blocks */
128
540000
        *mb_y -= (*mb_y > 17) ? 18 : -72;
129
6028020
}
130
131
#endif /* AVCODEC_DV_H */