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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 |