FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/ffv1dec_template.c
Date: 2025-04-29 22:51:50
Exec Total Coverage
Lines: 100 135 74.1%
Functions: 2 2 100.0%
Branches: 45 56 80.4%
Line Branch Exec Source
1 /*
2 * FFV1 decoder template
3 *
4 * Copyright (c) 2003-2016 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 #include "ffv1_template.c"
24
25 static av_always_inline int
26 4542400 RENAME(decode_line)(FFV1Context *f, FFV1SliceContext *sc,
27 GetBitContext *gb,
28 int w, TYPE *sample[2], int plane_index, int bits,
29 int ac)
30 {
31 4542400 PlaneContext *const p = &sc->plane[plane_index];
32 4542400 RangeCoder *const c = &sc->c;
33 4542400 const int16_t (*quant_table)[256] = f->quant_tables[p->quant_table_index];
34 int x;
35 4542400 int run_count = 0;
36 4542400 int run_mode = 0;
37 4542400 int run_index = sc->run_index;
38
39
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 4542400 if (bits == 0) {
40 ✗ for (x = 0; x < w; x++)
41 ✗ sample[1][x] = 0;
42 ✗ return 0;
43 }
44
45
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 4542400 if (is_input_end(c, gb, ac))
46 ✗ return AVERROR_INVALIDDATA;
47
48
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 4542400 if (sc->slice_coding_mode == 1) {
49 int i;
50 ✗ for (x = 0; x < w; x++) {
51 ✗ int v = 0;
52 ✗ for (i=0; i<bits; i++) {
53 ✗ uint8_t state = 128;
54 ✗ v += v + get_rac(c, &state);
55 }
56 ✗ sample[1][x] = v;
57 }
58 ✗ return 0;
59 }
60
61
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 687152820 for (x = 0; x < w; x++) {
62 int diff, context, sign;
63
64
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 682610420 if (!(x & 1023)) {
65
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 4542400 if (is_input_end(c, gb, ac))
66 ✗ return AVERROR_INVALIDDATA;
67 }
68
69 682610420 context = RENAME(get_context)(quant_table,
70 682610420 sample[1] + x, sample[0] + x, sample[1] + x);
71
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 682610420 if (context < 0) {
72 311381694 context = -context;
73 311381694 sign = 1;
74 } else
75 371228726 sign = 0;
76
77 av_assert2(context < p->context_count);
78
79
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 682610420 if (ac != AC_GOLOMB_RICE) {
80 351097200 diff = get_symbol_inline(c, p->state[context], 1);
81 } else {
82
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 331513220 if (context == 0 && run_mode == 0)
83 3266778 run_mode = 1;
84
85
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 331513220 if (run_mode) {
86
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 7345012 if (run_count == 0 && run_mode == 1) {
87
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 6141494 if (get_bits1(gb)) {
88 2989720 run_count = 1 << ff_log2_run[run_index];
89
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 2989720 if (x + run_count <= w)
90 2914304 run_index++;
91 } else {
92
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 3151774 if (ff_log2_run[run_index])
93 2270694 run_count = get_bits(gb, ff_log2_run[run_index]);
94 else
95 881080 run_count = 0;
96
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 3151774 if (run_index)
97 2878958 run_index--;
98 3151774 run_mode = 2;
99 }
100 }
101
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 7345012 if (sample[1][x - 1] == sample[0][x - 1]) {
102
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 12119628 while (run_count > 1 && w-x > 1) {
103 4779490 sample[1][x] = sample[0][x];
104 4779490 x++;
105 4779490 run_count--;
106 }
107 } else {
108
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 5564 while (run_count > 1 && w-x > 1) {
109 690 sample[1][x] = RENAME(predict)(sample[1] + x, sample[0] + x);
110 690 x++;
111 690 run_count--;
112 }
113 }
114 7345012 run_count--;
115
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 7345012 if (run_count < 0) {
116 3151774 run_mode = 0;
117 3151774 run_count = 0;
118 3151774 diff = get_vlc_symbol(gb, &p->vlc_state[context],
119 bits);
120
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 3151774 if (diff >= 0)
121 1481354 diff++;
122 } else
123 4193238 diff = 0;
124 } else
125 324168208 diff = get_vlc_symbol(gb, &p->vlc_state[context], bits);
126
127 ff_dlog(f->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n",
128 run_count, run_index, run_mode, x, get_bits_count(gb));
129 }
130
131
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 682610420 if (sign)
132 311381694 diff = -(unsigned)diff;
133
134 682610420 sample[1][x] = av_zero_extend(RENAME(predict)(sample[1] + x, sample[0] + x) + (SUINT)diff, bits);
135 }
136 4542400 sc->run_index = run_index;
137 4542400 return 0;
138 }
139
140 1600 static int RENAME(decode_rgb_frame)(FFV1Context *f, FFV1SliceContext *sc,
141 GetBitContext *gb,
142 uint8_t *src[4], int w, int h, int stride[4])
143 {
144 int x, y, p;
145 TYPE *sample[4][2];
146 1600 int lbd = f->avctx->bits_per_raw_sample <= 8;
147 int bits[4], offset;
148 1600 int transparency = f->transparency;
149 1600 int ac = f->ac;
150 unsigned mask[4];
151
152 1600 ff_ffv1_compute_bits_per_plane(f, sc, bits, &offset, mask, f->avctx->bits_per_raw_sample);
153
154 1600 if (sc->slice_coding_mode == 1)
155 ✗ ac = 1;
156
157 8000 for (x = 0; x < 4; x++) {
158 6400 sample[x][0] = RENAME(sc->sample_buffer) + x * 2 * (w + 6) + 3;
159 6400 sample[x][1] = RENAME(sc->sample_buffer) + (x * 2 + 1) * (w + 6) + 3;
160 }
161
162 1600 sc->run_index = 0;
163
164 1600 memset(RENAME(sc->sample_buffer), 0, 8 * (w + 6) * sizeof(*RENAME(sc->sample_buffer)));
165
166 181200 for (y = 0; y < h; y++) {
167 718400 for (p = 0; p < 3 + transparency; p++) {
168 int ret;
169 538800 TYPE *temp = sample[p][0]; // FIXME: try a normal buffer
170
171 538800 sample[p][0] = sample[p][1];
172 538800 sample[p][1] = temp;
173
174 538800 sample[p][1][-1]= sample[p][0][0 ];
175 538800 sample[p][0][ w]= sample[p][0][w-1];
176 538800 if (bits[p] == 9)
177 269400 ret = RENAME(decode_line)(f, sc, gb, w, sample[p], (p + 1)/2, 9, ac);
178 else
179 269400 ret = RENAME(decode_line)(f, sc, gb, w, sample[p], (p + 1)/2, bits[p], ac);
180 538800 if (ret < 0)
181 ✗ return ret;
182 }
183 30708000 for (x = 0; x < w; x++) {
184 30528400 int g = sample[0][1][x];
185 30528400 int b = sample[1][1][x];
186 30528400 int r = sample[2][1][x];
187 30528400 int a = sample[3][1][x];
188
189 30528400 if (sc->slice_coding_mode != 1) {
190 30528400 b -= offset;
191 30528400 r -= offset;
192 30528400 g -= (b * sc->slice_rct_by_coef + r * sc->slice_rct_ry_coef) >> 2;
193 30528400 b += g;
194 30528400 r += g;
195 }
196 30528400 if (sc->remap) {
197 ✗ if (f->avctx->bits_per_raw_sample == 32) {
198 ✗ g = sc->fltmap32[0][g & mask[0]];
199 ✗ b = sc->fltmap32[1][b & mask[1]];
200 ✗ r = sc->fltmap32[2][r & mask[2]];
201 ✗ if (transparency)
202 ✗ a = sc->fltmap32[3][a & mask[3]];
203 } else {
204 ✗ g = sc->fltmap[0][g & mask[0]];
205 ✗ b = sc->fltmap[1][b & mask[1]];
206 ✗ r = sc->fltmap[2][r & mask[2]];
207 ✗ if (transparency)
208 ✗ a = sc->fltmap[3][a & mask[3]];
209 }
210 }
211
212 30528400 if (lbd) {
213 15264200 *((uint32_t*)(src[0] + x*4 + stride[0]*y)) = b + ((unsigned)g<<8) + ((unsigned)r<<16) + ((unsigned)a<<24);
214 15264200 } else if (f->avctx->bits_per_raw_sample == 32) {
215 ✗ *((uint32_t*)(src[0] + x*4 + stride[0]*y)) = g;
216 ✗ *((uint32_t*)(src[1] + x*4 + stride[1]*y)) = b;
217 ✗ *((uint32_t*)(src[2] + x*4 + stride[2]*y)) = r;
218 ✗ if (transparency)
219 ✗ *((uint32_t*)(src[3] + x*4 + stride[3]*y)) = a;
220 ✗ } else if (sizeof(TYPE) == 4 || transparency) {
221 15264200 *((uint16_t*)(src[0] + x*2 + stride[0]*y)) = g;
222 15264200 *((uint16_t*)(src[1] + x*2 + stride[1]*y)) = b;
223 15264200 *((uint16_t*)(src[2] + x*2 + stride[2]*y)) = r;
224 15264200 if (transparency)
225 ✗ *((uint16_t*)(src[3] + x*2 + stride[3]*y)) = a;
226 } else {
227 ✗ *((uint16_t*)(src[0] + x*2 + stride[0]*y)) = b;
228 ✗ *((uint16_t*)(src[1] + x*2 + stride[1]*y)) = g;
229 ✗ *((uint16_t*)(src[2] + x*2 + stride[2]*y)) = r;
230 }
231 }
232 }
233 1600 return 0;
234 }
235