FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/ffv1.c
Date: 2023-12-07 21:54:23
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
36 108 av_cold int ff_ffv1_common_init(AVCodecContext *avctx)
37 {
38 108 FFV1Context *s = avctx->priv_data;
39
40
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 108 if (!avctx->width || !avctx->height)
41 ✗ return AVERROR_INVALIDDATA;
42
43 108 s->avctx = avctx;
44 108 s->flags = avctx->flags;
45
46 108 s->width = avctx->width;
47 108 s->height = avctx->height;
48
49 // defaults
50 108 s->num_h_slices = 1;
51 108 s->num_v_slices = 1;
52
53 108 return 0;
54 }
55
56 12000 av_cold int ff_ffv1_init_slice_state(const FFV1Context *f, FFV1Context *fs)
57 {
58 int j, i;
59
60 12000 fs->plane_count = f->plane_count;
61 12000 fs->transparency = f->transparency;
62
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 36000 for (j = 0; j < f->plane_count; j++) {
63 24000 PlaneContext *const p = &fs->plane[j];
64
65
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 24000 if (fs->ac != AC_GOLOMB_RICE) {
66
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 13256 if (!p->state)
67 712 p->state = av_malloc_array(p->context_count, CONTEXT_SIZE *
68 sizeof(uint8_t));
69
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 13256 if (!p->state)
70 ✗ return AVERROR(ENOMEM);
71 } else {
72
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 10744 if (!p->vlc_state) {
73 560 p->vlc_state = av_calloc(p->context_count, sizeof(*p->vlc_state));
74
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 560 if (!p->vlc_state)
75 ✗ return AVERROR(ENOMEM);
76
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 229664 for (i = 0; i < p->context_count; i++) {
77 229104 p->vlc_state[i].error_sum = 4;
78 229104 p->vlc_state[i].count = 1;
79 }
80 }
81 }
82 }
83
84
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 12000 if (fs->ac == AC_RANGE_CUSTOM_TAB) {
85 //FIXME only redo if state_transition changed
86
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 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 12000 return 0;
93 }
94
95 38 av_cold int ff_ffv1_init_slices_state(FFV1Context *f)
96 {
97 int i, ret;
98
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 178 for (i = 0; i < f->max_slice_count; i++) {
99 140 FFV1Context *fs = f->slice_context[i];
100
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 140 if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
101 ✗ return AVERROR(ENOMEM);
102 }
103 38 return 0;
104 }
105
106 108 av_cold int ff_ffv1_init_slice_contexts(FFV1Context *f)
107 {
108 108 int i, max_slice_count = f->num_h_slices * f->num_v_slices;
109
110
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 108 av_assert0(max_slice_count > 0);
111
112
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 504 for (i = 0; i < max_slice_count;) {
113 396 int sx = i % f->num_h_slices;
114 396 int sy = i / f->num_h_slices;
115 396 int sxs = f->avctx->width * sx / f->num_h_slices;
116 396 int sxe = f->avctx->width * (sx + 1) / f->num_h_slices;
117 396 int sys = f->avctx->height * sy / f->num_v_slices;
118 396 int sye = f->avctx->height * (sy + 1) / f->num_v_slices;
119 396 FFV1Context *fs = av_mallocz(sizeof(*fs));
120
121
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 396 if (!fs)
122 ✗ goto memfail;
123
124 396 f->slice_context[i++] = fs;
125 396 memcpy(fs, f, sizeof(*fs));
126 396 memset(fs->rc_stat2, 0, sizeof(fs->rc_stat2));
127
128 396 fs->slice_width = sxe - sxs;
129 396 fs->slice_height = sye - sys;
130 396 fs->slice_x = sxs;
131 396 fs->slice_y = sys;
132
133 396 fs->sample_buffer = av_malloc_array((fs->width + 6), 3 * MAX_PLANES *
134 sizeof(*fs->sample_buffer));
135 396 fs->sample_buffer32 = av_malloc_array((fs->width + 6), 3 * MAX_PLANES *
136 sizeof(*fs->sample_buffer32));
137
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 396 if (!fs->sample_buffer || !fs->sample_buffer32)
138 ✗ goto memfail;
139 }
140 108 f->max_slice_count = max_slice_count;
141 108 return 0;
142
143 ✗ memfail:
144 ✗ f->max_slice_count = i;
145 ✗ return AVERROR(ENOMEM);
146 }
147
148 100 int ff_ffv1_allocate_initial_states(FFV1Context *f)
149 {
150 int i;
151
152
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 300 for (i = 0; i < f->quant_table_count; i++) {
153 200 f->initial_states[i] = av_malloc_array(f->context_count[i],
154 sizeof(*f->initial_states[i]));
155
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 200 if (!f->initial_states[i])
156 ✗ return AVERROR(ENOMEM);
157 200 memset(f->initial_states[i], 128,
158 200 f->context_count[i] * sizeof(*f->initial_states[i]));
159 }
160 100 return 0;
161 }
162
163 1400 void ff_ffv1_clear_slice_state(const FFV1Context *f, FFV1Context *fs)
164 {
165 int i, j;
166
167
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 4200 for (i = 0; i < f->plane_count; i++) {
168 2800 PlaneContext *p = &fs->plane[i];
169
170 2800 p->interlace_bit_state[0] = 128;
171 2800 p->interlace_bit_state[1] = 128;
172
173
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 2800 if (fs->ac != AC_GOLOMB_RICE) {
174
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 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
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 805736 for (j = 0; j < p->context_count; j++) {
181 804528 p->vlc_state[j].drift = 0;
182 804528 p->vlc_state[j].error_sum = 4; //FFMAX((RANGE + 32)/64, 2);
183 804528 p->vlc_state[j].bias = 0;
184 804528 p->vlc_state[j].count = 1;
185 }
186 }
187 }
188 1400 }
189
190
191 108 av_cold int ff_ffv1_close(AVCodecContext *avctx)
192 {
193 108 FFV1Context *s = avctx->priv_data;
194 int i, j;
195
196
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 504 for (j = 0; j < s->max_slice_count; j++) {
197 396 FFV1Context *fs = s->slice_context[j];
198
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 1188 for (i = 0; i < s->plane_count; i++) {
199 792 PlaneContext *p = &fs->plane[i];
200
201 792 av_freep(&p->state);
202 792 av_freep(&p->vlc_state);
203 }
204 396 av_freep(&fs->sample_buffer);
205 396 av_freep(&fs->sample_buffer32);
206 }
207
208 108 av_freep(&avctx->stats_out);
209
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 308 for (j = 0; j < s->quant_table_count; j++) {
210 200 av_freep(&s->initial_states[j]);
211
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 976 for (i = 0; i < s->max_slice_count; i++) {
212 776 FFV1Context *sf = s->slice_context[i];
213 776 av_freep(&sf->rc_stat2[j]);
214 }
215 200 av_freep(&s->rc_stat2[j]);
216 }
217
218
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 504 for (i = 0; i < s->max_slice_count; i++)
219 396 av_freep(&s->slice_context[i]);
220
221 108 return 0;
222 }
223