FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/ffv1.c
Date: 2024-07-24 19:24:46
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 #include "libavutil/mem.h"
31
32 #include "avcodec.h"
33 #include "ffv1.h"
34
35 111 av_cold int ff_ffv1_common_init(AVCodecContext *avctx)
36 {
37 111 FFV1Context *s = avctx->priv_data;
38
39
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111 if (!avctx->width || !avctx->height)
40 return AVERROR_INVALIDDATA;
41
42 111 s->avctx = avctx;
43 111 s->flags = avctx->flags;
44
45 111 s->width = avctx->width;
46 111 s->height = avctx->height;
47
48 // defaults
49 111 s->num_h_slices = 1;
50 111 s->num_v_slices = 1;
51
52 111 return 0;
53 }
54
55 12052 av_cold int ff_ffv1_init_slice_state(const FFV1Context *f, FFV1Context *fs)
56 {
57 int j, i;
58
59 12052 fs->plane_count = f->plane_count;
60 12052 fs->transparency = f->transparency;
61
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36156 for (j = 0; j < f->plane_count; j++) {
62 24104 PlaneContext *const p = &fs->plane[j];
63
64
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24104 if (fs->ac != AC_GOLOMB_RICE) {
65
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13256 if (!p->state)
66 712 p->state = av_malloc_array(p->context_count, CONTEXT_SIZE *
67 sizeof(uint8_t));
68
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13256 if (!p->state)
69 return AVERROR(ENOMEM);
70 } else {
71
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10848 if (!p->vlc_state) {
72 566 p->vlc_state = av_calloc(p->context_count, sizeof(*p->vlc_state));
73
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566 if (!p->vlc_state)
74 return AVERROR(ENOMEM);
75
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233666 for (i = 0; i < p->context_count; i++) {
76 233100 p->vlc_state[i].error_sum = 4;
77 233100 p->vlc_state[i].count = 1;
78 }
79 }
80 }
81 }
82
83
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12052 if (fs->ac == AC_RANGE_CUSTOM_TAB) {
84 //FIXME only redo if state_transition changed
85
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1696768 for (j = 1; j < 256; j++) {
86 1690140 fs->c. one_state[ j] = f->state_transition[j];
87 1690140 fs->c.zero_state[256 - j] = 256 - fs->c.one_state[j];
88 }
89 }
90
91 12052 return 0;
92 }
93
94 39 av_cold int ff_ffv1_init_slices_state(FFV1Context *f)
95 {
96 int i, ret;
97
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180 for (i = 0; i < f->max_slice_count; i++) {
98 141 FFV1Context *fs = f->slice_context[i];
99
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141 if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
100 return AVERROR(ENOMEM);
101 }
102 39 return 0;
103 }
104
105 111 av_cold int ff_ffv1_init_slice_contexts(FFV1Context *f)
106 {
107 111 int i, max_slice_count = f->num_h_slices * f->num_v_slices;
108
109
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111 av_assert0(max_slice_count > 0);
110
111
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510 for (i = 0; i < max_slice_count;) {
112 399 int sx = i % f->num_h_slices;
113 399 int sy = i / f->num_h_slices;
114 399 int sxs = f->avctx->width * sx / f->num_h_slices;
115 399 int sxe = f->avctx->width * (sx + 1) / f->num_h_slices;
116 399 int sys = f->avctx->height * sy / f->num_v_slices;
117 399 int sye = f->avctx->height * (sy + 1) / f->num_v_slices;
118 399 FFV1Context *fs = av_mallocz(sizeof(*fs));
119
120
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399 if (!fs)
121 goto memfail;
122
123 399 f->slice_context[i++] = fs;
124 399 memcpy(fs, f, sizeof(*fs));
125 399 memset(fs->rc_stat2, 0, sizeof(fs->rc_stat2));
126
127 399 fs->slice_width = sxe - sxs;
128 399 fs->slice_height = sye - sys;
129 399 fs->slice_x = sxs;
130 399 fs->slice_y = sys;
131
132 399 fs->sample_buffer = av_malloc_array((fs->width + 6), 3 * MAX_PLANES *
133 sizeof(*fs->sample_buffer));
134 399 fs->sample_buffer32 = av_malloc_array((fs->width + 6), 3 * MAX_PLANES *
135 sizeof(*fs->sample_buffer32));
136
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399 if (!fs->sample_buffer || !fs->sample_buffer32)
137 goto memfail;
138 }
139 111 f->max_slice_count = max_slice_count;
140 111 return 0;
141
142 memfail:
143 f->max_slice_count = i;
144 return AVERROR(ENOMEM);
145 }
146
147 101 int ff_ffv1_allocate_initial_states(FFV1Context *f)
148 {
149 int i;
150
151
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303 for (i = 0; i < f->quant_table_count; i++) {
152 202 f->initial_states[i] = av_malloc_array(f->context_count[i],
153 sizeof(*f->initial_states[i]));
154
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202 if (!f->initial_states[i])
155 return AVERROR(ENOMEM);
156 202 memset(f->initial_states[i], 128,
157 202 f->context_count[i] * sizeof(*f->initial_states[i]));
158 }
159 101 return 0;
160 }
161
162 1411 void ff_ffv1_clear_slice_state(const FFV1Context *f, FFV1Context *fs)
163 {
164 int i, j;
165
166
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4233 for (i = 0; i < f->plane_count; i++) {
167 2822 PlaneContext *p = &fs->plane[i];
168
169 2822 p->interlace_bit_state[0] = 128;
170 2822 p->interlace_bit_state[1] = 128;
171
172
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2822 if (fs->ac != AC_GOLOMB_RICE) {
173
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1592 if (f->initial_states[p->quant_table_index]) {
174 1592 memcpy(p->state, f->initial_states[p->quant_table_index],
175 1592 CONTEXT_SIZE * p->context_count);
176 } else
177 memset(p->state, 128, CONTEXT_SIZE * p->context_count);
178 } else {
179
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820410 for (j = 0; j < p->context_count; j++) {
180 819180 p->vlc_state[j].drift = 0;
181 819180 p->vlc_state[j].error_sum = 4; //FFMAX((RANGE + 32)/64, 2);
182 819180 p->vlc_state[j].bias = 0;
183 819180 p->vlc_state[j].count = 1;
184 }
185 }
186 }
187 1411 }
188
189
190 111 av_cold int ff_ffv1_close(AVCodecContext *avctx)
191 {
192 111 FFV1Context *s = avctx->priv_data;
193 int i, j;
194
195
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510 for (j = 0; j < s->max_slice_count; j++) {
196 399 FFV1Context *fs = s->slice_context[j];
197
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1197 for (i = 0; i < s->plane_count; i++) {
198 798 PlaneContext *p = &fs->plane[i];
199
200 798 av_freep(&p->state);
201 798 av_freep(&p->vlc_state);
202 }
203 399 av_freep(&fs->sample_buffer);
204 399 av_freep(&fs->sample_buffer32);
205 }
206
207 111 av_freep(&avctx->stats_out);
208
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313 for (j = 0; j < s->quant_table_count; j++) {
209 202 av_freep(&s->initial_states[j]);
210
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980 for (i = 0; i < s->max_slice_count; i++) {
211 778 FFV1Context *sf = s->slice_context[i];
212 778 av_freep(&sf->rc_stat2[j]);
213 }
214 202 av_freep(&s->rc_stat2[j]);
215 }
216
217
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510 for (i = 0; i < s->max_slice_count; i++)
218 399 av_freep(&s->slice_context[i]);
219
220 111 return 0;
221 }
222