FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/ffv1.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 101 112 90.2%
Functions: 7 7 100.0%
Branches: 47 58 81.0%

Line Branch Exec Source
1 /*
2 * FFV1 codec for libavcodec
3 *
4 * Copyright (c) 2003-2013 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 /**
24 * @file
25 * FF Video Codec 1 (a lossless codec)
26 */
27
28 #include "libavutil/attributes.h"
29 #include "libavutil/avassert.h"
30
31 #include "avcodec.h"
32 #include "rangecoder.h"
33 #include "ffv1.h"
34 #include "threadframe.h"
35
36 105 av_cold int ff_ffv1_common_init(AVCodecContext *avctx)
37 {
38 105 FFV1Context *s = avctx->priv_data;
39
40
2/4
✓ Branch 0 taken 105 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 105 times.
105 if (!avctx->width || !avctx->height)
41 return AVERROR_INVALIDDATA;
42
43 105 s->avctx = avctx;
44 105 s->flags = avctx->flags;
45
46 105 s->width = avctx->width;
47 105 s->height = avctx->height;
48
49 // defaults
50 105 s->num_h_slices = 1;
51 105 s->num_v_slices = 1;
52
53 105 return 0;
54 }
55
56 11788 av_cold int ff_ffv1_init_slice_state(const FFV1Context *f, FFV1Context *fs)
57 {
58 int j, i;
59
60 11788 fs->plane_count = f->plane_count;
61 11788 fs->transparency = f->transparency;
62
2/2
✓ Branch 0 taken 23576 times.
✓ Branch 1 taken 11788 times.
35364 for (j = 0; j < f->plane_count; j++) {
63 23576 PlaneContext *const p = &fs->plane[j];
64
65
2/2
✓ Branch 0 taken 13256 times.
✓ Branch 1 taken 10320 times.
23576 if (fs->ac != AC_GOLOMB_RICE) {
66
2/2
✓ Branch 0 taken 712 times.
✓ Branch 1 taken 12544 times.
13256 if (!p->state)
67 712 p->state = av_malloc_array(p->context_count, CONTEXT_SIZE *
68 sizeof(uint8_t));
69
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 13256 times.
13256 if (!p->state)
70 return AVERROR(ENOMEM);
71 } else {
72
2/2
✓ Branch 0 taken 520 times.
✓ Branch 1 taken 9800 times.
10320 if (!p->vlc_state) {
73 520 p->vlc_state = av_calloc(p->context_count, sizeof(*p->vlc_state));
74
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 520 times.
520 if (!p->vlc_state)
75 return AVERROR(ENOMEM);
76
2/2
✓ Branch 0 taken 213120 times.
✓ Branch 1 taken 520 times.
213640 for (i = 0; i < p->context_count; i++) {
77 213120 p->vlc_state[i].error_sum = 4;
78 213120 p->vlc_state[i].count = 1;
79 }
80 }
81 }
82 }
83
84
2/2
✓ Branch 0 taken 6628 times.
✓ Branch 1 taken 5160 times.
11788 if (fs->ac == AC_RANGE_CUSTOM_TAB) {
85 //FIXME only redo if state_transition changed
86
2/2
✓ Branch 0 taken 1690140 times.
✓ Branch 1 taken 6628 times.
1696768 for (j = 1; j < 256; j++) {
87 1690140 fs->c. one_state[ j] = f->state_transition[j];
88 1690140 fs->c.zero_state[256 - j] = 256 - fs->c.one_state[j];
89 }
90 }
91
92 11788 return 0;
93 }
94
95 37 av_cold int ff_ffv1_init_slices_state(FFV1Context *f)
96 {
97 int i, ret;
98
2/2
✓ Branch 0 taken 136 times.
✓ Branch 1 taken 37 times.
173 for (i = 0; i < f->max_slice_count; i++) {
99 136 FFV1Context *fs = f->slice_context[i];
100
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 136 times.
136 if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
101 return AVERROR(ENOMEM);
102 }
103 37 return 0;
104 }
105
106 105 av_cold int ff_ffv1_init_slice_contexts(FFV1Context *f)
107 {
108 105 int i, max_slice_count = f->num_h_slices * f->num_v_slices;
109
110
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 105 times.
105 av_assert0(max_slice_count > 0);
111
112
2/2
✓ Branch 0 taken 384 times.
✓ Branch 1 taken 105 times.
489 for (i = 0; i < max_slice_count;) {
113 384 int sx = i % f->num_h_slices;
114 384 int sy = i / f->num_h_slices;
115 384 int sxs = f->avctx->width * sx / f->num_h_slices;
116 384 int sxe = f->avctx->width * (sx + 1) / f->num_h_slices;
117 384 int sys = f->avctx->height * sy / f->num_v_slices;
118 384 int sye = f->avctx->height * (sy + 1) / f->num_v_slices;
119 384 FFV1Context *fs = av_mallocz(sizeof(*fs));
120
121
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 384 times.
384 if (!fs)
122 goto memfail;
123
124 384 f->slice_context[i++] = fs;
125 384 memcpy(fs, f, sizeof(*fs));
126 384 memset(fs->rc_stat2, 0, sizeof(fs->rc_stat2));
127
128 384 fs->slice_width = sxe - sxs;
129 384 fs->slice_height = sye - sys;
130 384 fs->slice_x = sxs;
131 384 fs->slice_y = sys;
132
133 384 fs->sample_buffer = av_malloc_array((fs->width + 6), 3 * MAX_PLANES *
134 sizeof(*fs->sample_buffer));
135 384 fs->sample_buffer32 = av_malloc_array((fs->width + 6), 3 * MAX_PLANES *
136 sizeof(*fs->sample_buffer32));
137
2/4
✓ Branch 0 taken 384 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 384 times.
384 if (!fs->sample_buffer || !fs->sample_buffer32)
138 goto memfail;
139 }
140 105 f->max_slice_count = max_slice_count;
141 105 return 0;
142
143 memfail:
144 f->max_slice_count = i;
145 return AVERROR(ENOMEM);
146 }
147
148 97 int ff_ffv1_allocate_initial_states(FFV1Context *f)
149 {
150 int i;
151
152
2/2
✓ Branch 0 taken 194 times.
✓ Branch 1 taken 97 times.
291 for (i = 0; i < f->quant_table_count; i++) {
153 194 f->initial_states[i] = av_malloc_array(f->context_count[i],
154 sizeof(*f->initial_states[i]));
155
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 194 times.
194 if (!f->initial_states[i])
156 return AVERROR(ENOMEM);
157 194 memset(f->initial_states[i], 128,
158 194 f->context_count[i] * sizeof(*f->initial_states[i]));
159 }
160 97 return 0;
161 }
162
163 1372 void ff_ffv1_clear_slice_state(const FFV1Context *f, FFV1Context *fs)
164 {
165 int i, j;
166
167
2/2
✓ Branch 0 taken 2744 times.
✓ Branch 1 taken 1372 times.
4116 for (i = 0; i < f->plane_count; i++) {
168 2744 PlaneContext *p = &fs->plane[i];
169
170 2744 p->interlace_bit_state[0] = 128;
171 2744 p->interlace_bit_state[1] = 128;
172
173
2/2
✓ Branch 0 taken 1592 times.
✓ Branch 1 taken 1152 times.
2744 if (fs->ac != AC_GOLOMB_RICE) {
174
1/2
✓ Branch 0 taken 1592 times.
✗ Branch 1 not taken.
1592 if (f->initial_states[p->quant_table_index]) {
175 1592 memcpy(p->state, f->initial_states[p->quant_table_index],
176 1592 CONTEXT_SIZE * p->context_count);
177 } else
178 memset(p->state, 128, CONTEXT_SIZE * p->context_count);
179 } else {
180
2/2
✓ Branch 0 taken 767232 times.
✓ Branch 1 taken 1152 times.
768384 for (j = 0; j < p->context_count; j++) {
181 767232 p->vlc_state[j].drift = 0;
182 767232 p->vlc_state[j].error_sum = 4; //FFMAX((RANGE + 32)/64, 2);
183 767232 p->vlc_state[j].bias = 0;
184 767232 p->vlc_state[j].count = 1;
185 }
186 }
187 }
188 1372 }
189
190
191 105 av_cold int ff_ffv1_close(AVCodecContext *avctx)
192 {
193 105 FFV1Context *s = avctx->priv_data;
194 int i, j;
195
196
2/2
✓ Branch 0 taken 384 times.
✓ Branch 1 taken 105 times.
489 for (j = 0; j < s->max_slice_count; j++) {
197 384 FFV1Context *fs = s->slice_context[j];
198
2/2
✓ Branch 0 taken 768 times.
✓ Branch 1 taken 384 times.
1152 for (i = 0; i < s->plane_count; i++) {
199 768 PlaneContext *p = &fs->plane[i];
200
201 768 av_freep(&p->state);
202 768 av_freep(&p->vlc_state);
203 }
204 384 av_freep(&fs->sample_buffer);
205 384 av_freep(&fs->sample_buffer32);
206 }
207
208 105 av_freep(&avctx->stats_out);
209
2/2
✓ Branch 0 taken 194 times.
✓ Branch 1 taken 105 times.
299 for (j = 0; j < s->quant_table_count; j++) {
210 194 av_freep(&s->initial_states[j]);
211
2/2
✓ Branch 0 taken 752 times.
✓ Branch 1 taken 194 times.
946 for (i = 0; i < s->max_slice_count; i++) {
212 752 FFV1Context *sf = s->slice_context[i];
213 752 av_freep(&sf->rc_stat2[j]);
214 }
215 194 av_freep(&s->rc_stat2[j]);
216 }
217
218
2/2
✓ Branch 0 taken 384 times.
✓ Branch 1 taken 105 times.
489 for (i = 0; i < s->max_slice_count; i++)
219 384 av_freep(&s->slice_context[i]);
220
221 105 return 0;
222 }
223