FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/ffv1.c
Date: 2021-09-24 20:55:06
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 #include "libavutil/crc.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/pixdesc.h"
34
35 #include "avcodec.h"
36 #include "internal.h"
37 #include "rangecoder.h"
38 #include "mathops.h"
39 #include "ffv1.h"
40
41 89 av_cold int ff_ffv1_common_init(AVCodecContext *avctx)
42 {
43 89 FFV1Context *s = avctx->priv_data;
44
45
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89 if (!avctx->width || !avctx->height)
46 return AVERROR_INVALIDDATA;
47
48 89 s->avctx = avctx;
49 89 s->flags = avctx->flags;
50
51 89 s->picture.f = av_frame_alloc();
52 89 s->last_picture.f = av_frame_alloc();
53
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89 if (!s->picture.f || !s->last_picture.f)
54 return AVERROR(ENOMEM);
55
56 89 s->width = avctx->width;
57 89 s->height = avctx->height;
58
59 // defaults
60 89 s->num_h_slices = 1;
61 89 s->num_v_slices = 1;
62
63 89 return 0;
64 }
65
66 10124 av_cold int ff_ffv1_init_slice_state(FFV1Context *f, FFV1Context *fs)
67 {
68 int j, i;
69
70 10124 fs->plane_count = f->plane_count;
71 10124 fs->transparency = f->transparency;
72
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30372 for (j = 0; j < f->plane_count; j++) {
73 20248 PlaneContext *const p = &fs->plane[j];
74
75
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20248 if (fs->ac != AC_GOLOMB_RICE) {
76
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9928 if (!p->state)
77 520 p->state = av_malloc_array(p->context_count, CONTEXT_SIZE *
78 sizeof(uint8_t));
79
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9928 if (!p->state)
80 return AVERROR(ENOMEM);
81 } else {
82
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10320 if (!p->vlc_state) {
83 520 p->vlc_state = av_calloc(p->context_count, sizeof(*p->vlc_state));
84
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520 if (!p->vlc_state)
85 return AVERROR(ENOMEM);
86
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213640 for (i = 0; i < p->context_count; i++) {
87 213120 p->vlc_state[i].error_sum = 4;
88 213120 p->vlc_state[i].count = 1;
89 }
90 }
91 }
92 }
93
94
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10124 if (fs->ac == AC_RANGE_CUSTOM_TAB) {
95 //FIXME only redo if state_transition changed
96
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1270784 for (j = 1; j < 256; j++) {
97 1265820 fs->c. one_state[ j] = f->state_transition[j];
98 1265820 fs->c.zero_state[256 - j] = 256 - fs->c.one_state[j];
99 }
100 }
101
102 10124 return 0;
103 }
104
105 29 av_cold int ff_ffv1_init_slices_state(FFV1Context *f)
106 {
107 int i, ret;
108
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133 for (i = 0; i < f->max_slice_count; i++) {
109 104 FFV1Context *fs = f->slice_context[i];
110
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104 if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
111 return AVERROR(ENOMEM);
112 }
113 29 return 0;
114 }
115
116 89 av_cold int ff_ffv1_init_slice_contexts(FFV1Context *f)
117 {
118 89 int i, max_slice_count = f->num_h_slices * f->num_v_slices;
119
120
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89 av_assert0(max_slice_count > 0);
121
122
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409 for (i = 0; i < max_slice_count;) {
123 320 int sx = i % f->num_h_slices;
124 320 int sy = i / f->num_h_slices;
125 320 int sxs = f->avctx->width * sx / f->num_h_slices;
126 320 int sxe = f->avctx->width * (sx + 1) / f->num_h_slices;
127 320 int sys = f->avctx->height * sy / f->num_v_slices;
128 320 int sye = f->avctx->height * (sy + 1) / f->num_v_slices;
129 320 FFV1Context *fs = av_mallocz(sizeof(*fs));
130
131
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320 if (!fs)
132 goto memfail;
133
134 320 f->slice_context[i++] = fs;
135 320 memcpy(fs, f, sizeof(*fs));
136 320 memset(fs->rc_stat2, 0, sizeof(fs->rc_stat2));
137
138 320 fs->slice_width = sxe - sxs;
139 320 fs->slice_height = sye - sys;
140 320 fs->slice_x = sxs;
141 320 fs->slice_y = sys;
142
143 320 fs->sample_buffer = av_malloc_array((fs->width + 6), 3 * MAX_PLANES *
144 sizeof(*fs->sample_buffer));
145 320 fs->sample_buffer32 = av_malloc_array((fs->width + 6), 3 * MAX_PLANES *
146 sizeof(*fs->sample_buffer32));
147
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320 if (!fs->sample_buffer || !fs->sample_buffer32)
148 goto memfail;
149 }
150 89 f->max_slice_count = max_slice_count;
151 89 return 0;
152
153 memfail:
154 f->max_slice_count = i;
155 return AVERROR(ENOMEM);
156 }
157
158 81 int ff_ffv1_allocate_initial_states(FFV1Context *f)
159 {
160 int i;
161
162
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243 for (i = 0; i < f->quant_table_count; i++) {
163 162 f->initial_states[i] = av_malloc_array(f->context_count[i],
164 sizeof(*f->initial_states[i]));
165
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162 if (!f->initial_states[i])
166 return AVERROR(ENOMEM);
167 162 memset(f->initial_states[i], 128,
168 162 f->context_count[i] * sizeof(*f->initial_states[i]));
169 }
170 81 return 0;
171 }
172
173 1116 void ff_ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs)
174 {
175 int i, j;
176
177
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3348 for (i = 0; i < f->plane_count; i++) {
178 2232 PlaneContext *p = &fs->plane[i];
179
180 2232 p->interlace_bit_state[0] = 128;
181 2232 p->interlace_bit_state[1] = 128;
182
183
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2232 if (fs->ac != AC_GOLOMB_RICE) {
184
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1080 if (f->initial_states[p->quant_table_index]) {
185 1080 memcpy(p->state, f->initial_states[p->quant_table_index],
186 1080 CONTEXT_SIZE * p->context_count);
187 } else
188 memset(p->state, 128, CONTEXT_SIZE * p->context_count);
189 } else {
190
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768384 for (j = 0; j < p->context_count; j++) {
191 767232 p->vlc_state[j].drift = 0;
192 767232 p->vlc_state[j].error_sum = 4; //FFMAX((RANGE + 32)/64, 2);
193 767232 p->vlc_state[j].bias = 0;
194 767232 p->vlc_state[j].count = 1;
195 }
196 }
197 }
198 1116 }
199
200
201 89 av_cold int ff_ffv1_close(AVCodecContext *avctx)
202 {
203 89 FFV1Context *s = avctx->priv_data;
204 int i, j;
205
206
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89 if (s->picture.f)
207 89 ff_thread_release_buffer(avctx, &s->picture);
208 89 av_frame_free(&s->picture.f);
209
210
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89 if (s->last_picture.f)
211 89 ff_thread_release_buffer(avctx, &s->last_picture);
212 89 av_frame_free(&s->last_picture.f);
213
214
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409 for (j = 0; j < s->max_slice_count; j++) {
215 320 FFV1Context *fs = s->slice_context[j];
216
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960 for (i = 0; i < s->plane_count; i++) {
217 640 PlaneContext *p = &fs->plane[i];
218
219 640 av_freep(&p->state);
220 640 av_freep(&p->vlc_state);
221 }
222 320 av_freep(&fs->sample_buffer);
223 320 av_freep(&fs->sample_buffer32);
224 }
225
226 89 av_freep(&avctx->stats_out);
227
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251 for (j = 0; j < s->quant_table_count; j++) {
228 162 av_freep(&s->initial_states[j]);
229
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786 for (i = 0; i < s->max_slice_count; i++) {
230 624 FFV1Context *sf = s->slice_context[i];
231 624 av_freep(&sf->rc_stat2[j]);
232 }
233 162 av_freep(&s->rc_stat2[j]);
234 }
235
236
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409 for (i = 0; i < s->max_slice_count; i++)
237 320 av_freep(&s->slice_context[i]);
238
239 89 return 0;
240 }
241