GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/ffv1.h Lines: 24 24 100.0 %
Date: 2020-04-04 00:26:16 Branches: 12 12 100.0 %

Line Branch Exec Source
1
/*
2
 * FFV1 codec for libavcodec
3
 *
4
 * Copyright (c) 2003-2012 Michael Niedermayer <michaelni@gmx.at>
5
 *
6
 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
12
 *
13
 * FFmpeg is distributed in the hope that it will be useful,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * Lesser General Public License for more details.
17
 *
18
 * You should have received a copy of the GNU Lesser General Public
19
 * License along with FFmpeg; if not, write to the Free Software
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
22
23
#ifndef AVCODEC_FFV1_H
24
#define AVCODEC_FFV1_H
25
26
/**
27
 * @file
28
 * FF Video Codec 1 (a lossless codec)
29
 */
30
31
#include "libavutil/avassert.h"
32
#include "libavutil/crc.h"
33
#include "libavutil/opt.h"
34
#include "libavutil/imgutils.h"
35
#include "libavutil/pixdesc.h"
36
#include "avcodec.h"
37
#include "get_bits.h"
38
#include "internal.h"
39
#include "mathops.h"
40
#include "put_bits.h"
41
#include "rangecoder.h"
42
#include "thread.h"
43
44
#ifdef __INTEL_COMPILER
45
#undef av_flatten
46
#define av_flatten
47
#endif
48
49
#define MAX_PLANES 4
50
#define CONTEXT_SIZE 32
51
52
#define MAX_QUANT_TABLES 8
53
#define MAX_CONTEXT_INPUTS 5
54
55
#define AC_GOLOMB_RICE          0
56
#define AC_RANGE_DEFAULT_TAB    1
57
#define AC_RANGE_CUSTOM_TAB     2
58
#define AC_RANGE_DEFAULT_TAB_FORCE -2
59
60
typedef struct VlcState {
61
    int16_t drift;
62
    uint16_t error_sum;
63
    int8_t bias;
64
    uint8_t count;
65
} VlcState;
66
67
typedef struct PlaneContext {
68
    int16_t quant_table[MAX_CONTEXT_INPUTS][256];
69
    int quant_table_index;
70
    int context_count;
71
    uint8_t (*state)[CONTEXT_SIZE];
72
    VlcState *vlc_state;
73
    uint8_t interlace_bit_state[2];
74
} PlaneContext;
75
76
#define MAX_SLICES 1024
77
78
typedef struct FFV1Context {
79
    AVClass *class;
80
    AVCodecContext *avctx;
81
    RangeCoder c;
82
    GetBitContext gb;
83
    PutBitContext pb;
84
    uint64_t rc_stat[256][2];
85
    uint64_t (*rc_stat2[MAX_QUANT_TABLES])[32][2];
86
    int version;
87
    int micro_version;
88
    int width, height;
89
    int chroma_planes;
90
    int chroma_h_shift, chroma_v_shift;
91
    int transparency;
92
    int flags;
93
    int picture_number;
94
    int key_frame;
95
    ThreadFrame picture, last_picture;
96
    struct FFV1Context *fsrc;
97
98
    AVFrame *cur;
99
    int plane_count;
100
    int ac;                              ///< 1=range coder <-> 0=golomb rice
101
    int ac_byte_count;                   ///< number of bytes used for AC coding
102
    PlaneContext plane[MAX_PLANES];
103
    int16_t quant_table[MAX_CONTEXT_INPUTS][256];
104
    int16_t quant_tables[MAX_QUANT_TABLES][MAX_CONTEXT_INPUTS][256];
105
    int context_count[MAX_QUANT_TABLES];
106
    uint8_t state_transition[256];
107
    uint8_t (*initial_states[MAX_QUANT_TABLES])[32];
108
    int run_index;
109
    int colorspace;
110
    int16_t *sample_buffer;
111
    int32_t *sample_buffer32;
112
113
    int use32bit;
114
115
    int ec;
116
    int intra;
117
    int slice_damaged;
118
    int key_frame_ok;
119
    int context_model;
120
121
    int bits_per_raw_sample;
122
    int packed_at_lsb;
123
124
    int gob_count;
125
    int quant_table_count;
126
127
    struct FFV1Context *slice_context[MAX_SLICES];
128
    int slice_count;
129
    int max_slice_count;
130
    int num_v_slices;
131
    int num_h_slices;
132
    int slice_width;
133
    int slice_height;
134
    int slice_x;
135
    int slice_y;
136
    int slice_reset_contexts;
137
    int slice_coding_mode;
138
    int slice_rct_by_coef;
139
    int slice_rct_ry_coef;
140
} FFV1Context;
141
142
int ff_ffv1_common_init(AVCodecContext *avctx);
143
int ff_ffv1_init_slice_state(FFV1Context *f, FFV1Context *fs);
144
int ff_ffv1_init_slices_state(FFV1Context *f);
145
int ff_ffv1_init_slice_contexts(FFV1Context *f);
146
int ff_ffv1_allocate_initial_states(FFV1Context *f);
147
void ff_ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs);
148
int ff_ffv1_close(AVCodecContext *avctx);
149
150
460935288
static av_always_inline int fold(int diff, int bits)
151
{
152
460935288
    if (bits == 8)
153
204941315
        diff = (int8_t)diff;
154
    else {
155
255993973
        diff = sign_extend(diff, bits);
156
    }
157
158
460935288
    return diff;
159
}
160
161
224329788
static inline void update_vlc_state(VlcState *const state, const int v)
162
{
163
224329788
    int drift = state->drift;
164
224329788
    int count = state->count;
165
224329788
    state->error_sum += FFABS(v);
166
224329788
    drift            += v;
167
168
224329788
    if (count == 128) { // FIXME: variable
169
3054075
        count            >>= 1;
170
3054075
        drift            >>= 1;
171
3054075
        state->error_sum >>= 1;
172
    }
173
224329788
    count++;
174
175
224329788
    if (drift <= -count) {
176
7770001
        state->bias = FFMAX(state->bias - 1, -128);
177
178
7770001
        drift = FFMAX(drift + count, -count + 1);
179
216559787
    } else if (drift > 0) {
180
7153747
        state->bias = FFMIN(state->bias + 1, 127);
181
182
7153747
        drift = FFMIN(drift - count, 0);
183
    }
184
185
224329788
    state->drift = drift;
186
224329788
    state->count = count;
187
224329788
}
188
189
#define TYPE int16_t
190
#define RENAME(name) name
191
#include "ffv1_template.c"
192
#undef TYPE
193
#undef RENAME
194
195
#define TYPE int32_t
196
#define RENAME(name) name ## 32
197
#include "ffv1_template.c"
198
#undef TYPE
199
#undef RENAME
200
201
#endif /* AVCODEC_FFV1_H */