FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/ffv1.c
Date: 2022-07-04 00:18:54
Exec Total Coverage
Lines: 110 122 90.2%
Branches: 51 66 77.3%

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
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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->picture.f = av_frame_alloc();
47 105 s->last_picture.f = av_frame_alloc();
48
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105 if (!s->picture.f || !s->last_picture.f)
49 return AVERROR(ENOMEM);
50
51 105 s->width = avctx->width;
52 105 s->height = avctx->height;
53
54 // defaults
55 105 s->num_h_slices = 1;
56 105 s->num_v_slices = 1;
57
58 105 return 0;
59 }
60
61 11788 av_cold int ff_ffv1_init_slice_state(const FFV1Context *f, FFV1Context *fs)
62 {
63 int j, i;
64
65 11788 fs->plane_count = f->plane_count;
66 11788 fs->transparency = f->transparency;
67
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35364 for (j = 0; j < f->plane_count; j++) {
68 23576 PlaneContext *const p = &fs->plane[j];
69
70
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23576 if (fs->ac != AC_GOLOMB_RICE) {
71
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13256 if (!p->state)
72 712 p->state = av_malloc_array(p->context_count, CONTEXT_SIZE *
73 sizeof(uint8_t));
74
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13256 if (!p->state)
75 return AVERROR(ENOMEM);
76 } else {
77
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10320 if (!p->vlc_state) {
78 520 p->vlc_state = av_calloc(p->context_count, sizeof(*p->vlc_state));
79
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520 if (!p->vlc_state)
80 return AVERROR(ENOMEM);
81
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213640 for (i = 0; i < p->context_count; i++) {
82 213120 p->vlc_state[i].error_sum = 4;
83 213120 p->vlc_state[i].count = 1;
84 }
85 }
86 }
87 }
88
89
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11788 if (fs->ac == AC_RANGE_CUSTOM_TAB) {
90 //FIXME only redo if state_transition changed
91
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1696768 for (j = 1; j < 256; j++) {
92 1690140 fs->c. one_state[ j] = f->state_transition[j];
93 1690140 fs->c.zero_state[256 - j] = 256 - fs->c.one_state[j];
94 }
95 }
96
97 11788 return 0;
98 }
99
100 37 av_cold int ff_ffv1_init_slices_state(FFV1Context *f)
101 {
102 int i, ret;
103
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173 for (i = 0; i < f->max_slice_count; i++) {
104 136 FFV1Context *fs = f->slice_context[i];
105
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136 if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
106 return AVERROR(ENOMEM);
107 }
108 37 return 0;
109 }
110
111 105 av_cold int ff_ffv1_init_slice_contexts(FFV1Context *f)
112 {
113 105 int i, max_slice_count = f->num_h_slices * f->num_v_slices;
114
115
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105 av_assert0(max_slice_count > 0);
116
117
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489 for (i = 0; i < max_slice_count;) {
118 384 int sx = i % f->num_h_slices;
119 384 int sy = i / f->num_h_slices;
120 384 int sxs = f->avctx->width * sx / f->num_h_slices;
121 384 int sxe = f->avctx->width * (sx + 1) / f->num_h_slices;
122 384 int sys = f->avctx->height * sy / f->num_v_slices;
123 384 int sye = f->avctx->height * (sy + 1) / f->num_v_slices;
124 384 FFV1Context *fs = av_mallocz(sizeof(*fs));
125
126
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384 if (!fs)
127 goto memfail;
128
129 384 f->slice_context[i++] = fs;
130 384 memcpy(fs, f, sizeof(*fs));
131 384 memset(fs->rc_stat2, 0, sizeof(fs->rc_stat2));
132
133 384 fs->slice_width = sxe - sxs;
134 384 fs->slice_height = sye - sys;
135 384 fs->slice_x = sxs;
136 384 fs->slice_y = sys;
137
138 384 fs->sample_buffer = av_malloc_array((fs->width + 6), 3 * MAX_PLANES *
139 sizeof(*fs->sample_buffer));
140 384 fs->sample_buffer32 = av_malloc_array((fs->width + 6), 3 * MAX_PLANES *
141 sizeof(*fs->sample_buffer32));
142
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384 if (!fs->sample_buffer || !fs->sample_buffer32)
143 goto memfail;
144 }
145 105 f->max_slice_count = max_slice_count;
146 105 return 0;
147
148 memfail:
149 f->max_slice_count = i;
150 return AVERROR(ENOMEM);
151 }
152
153 97 int ff_ffv1_allocate_initial_states(FFV1Context *f)
154 {
155 int i;
156
157
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291 for (i = 0; i < f->quant_table_count; i++) {
158 194 f->initial_states[i] = av_malloc_array(f->context_count[i],
159 sizeof(*f->initial_states[i]));
160
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194 if (!f->initial_states[i])
161 return AVERROR(ENOMEM);
162 194 memset(f->initial_states[i], 128,
163 194 f->context_count[i] * sizeof(*f->initial_states[i]));
164 }
165 97 return 0;
166 }
167
168 1372 void ff_ffv1_clear_slice_state(const FFV1Context *f, FFV1Context *fs)
169 {
170 int i, j;
171
172
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4116 for (i = 0; i < f->plane_count; i++) {
173 2744 PlaneContext *p = &fs->plane[i];
174
175 2744 p->interlace_bit_state[0] = 128;
176 2744 p->interlace_bit_state[1] = 128;
177
178
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2744 if (fs->ac != AC_GOLOMB_RICE) {
179
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1592 if (f->initial_states[p->quant_table_index]) {
180 1592 memcpy(p->state, f->initial_states[p->quant_table_index],
181 1592 CONTEXT_SIZE * p->context_count);
182 } else
183 memset(p->state, 128, CONTEXT_SIZE * p->context_count);
184 } else {
185
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768384 for (j = 0; j < p->context_count; j++) {
186 767232 p->vlc_state[j].drift = 0;
187 767232 p->vlc_state[j].error_sum = 4; //FFMAX((RANGE + 32)/64, 2);
188 767232 p->vlc_state[j].bias = 0;
189 767232 p->vlc_state[j].count = 1;
190 }
191 }
192 }
193 1372 }
194
195
196 105 av_cold int ff_ffv1_close(AVCodecContext *avctx)
197 {
198 105 FFV1Context *s = avctx->priv_data;
199 int i, j;
200
201
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105 if (s->picture.f)
202 105 ff_thread_release_ext_buffer(avctx, &s->picture);
203 105 av_frame_free(&s->picture.f);
204
205
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105 if (s->last_picture.f)
206 105 ff_thread_release_ext_buffer(avctx, &s->last_picture);
207 105 av_frame_free(&s->last_picture.f);
208
209
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489 for (j = 0; j < s->max_slice_count; j++) {
210 384 FFV1Context *fs = s->slice_context[j];
211
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1152 for (i = 0; i < s->plane_count; i++) {
212 768 PlaneContext *p = &fs->plane[i];
213
214 768 av_freep(&p->state);
215 768 av_freep(&p->vlc_state);
216 }
217 384 av_freep(&fs->sample_buffer);
218 384 av_freep(&fs->sample_buffer32);
219 }
220
221 105 av_freep(&avctx->stats_out);
222
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299 for (j = 0; j < s->quant_table_count; j++) {
223 194 av_freep(&s->initial_states[j]);
224
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946 for (i = 0; i < s->max_slice_count; i++) {
225 752 FFV1Context *sf = s->slice_context[i];
226 752 av_freep(&sf->rc_stat2[j]);
227 }
228 194 av_freep(&s->rc_stat2[j]);
229 }
230
231
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489 for (i = 0; i < s->max_slice_count; i++)
232 384 av_freep(&s->slice_context[i]);
233
234 105 return 0;
235 }
236