FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/dv.c
Date: 2022-07-04 00:18:54
Exec Total Coverage
Lines: 68 79 86.1%
Branches: 38 45 84.4%

Line Branch Exec Source
1 /*
2 * DV decoder
3 * Copyright (c) 2002 Fabrice Bellard
4 * Copyright (c) 2004 Roman Shaposhnik
5 *
6 * DV encoder
7 * Copyright (c) 2003 Roman Shaposhnik
8 *
9 * 50 Mbps (DVCPRO50) support
10 * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
11 *
12 * 100 Mbps (DVCPRO HD) support
13 * Initial code by Daniel Maas <dmaas@maasdigital.com> (funded by BBC R&D)
14 * Final code by Roman Shaposhnik
15 *
16 * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
17 * of DV technical info.
18 *
19 * This file is part of FFmpeg.
20 *
21 * FFmpeg is free software; you can redistribute it and/or
22 * modify it under the terms of the GNU Lesser General Public
23 * License as published by the Free Software Foundation; either
24 * version 2.1 of the License, or (at your option) any later version.
25 *
26 * FFmpeg is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
29 * Lesser General Public License for more details.
30 *
31 * You should have received a copy of the GNU Lesser General Public
32 * License along with FFmpeg; if not, write to the Free Software
33 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
34 */
35
36 /**
37 * @file
38 * DV codec.
39 */
40
41 #include "avcodec.h"
42 #include "dv.h"
43
44 43578 static inline void dv_calc_mb_coordinates(const AVDVProfile *d, int chan,
45 int seq, int slot, uint16_t *tbl)
46 {
47 static const uint8_t off[] = { 2, 6, 8, 0, 4 };
48 static const uint8_t shuf1[] = { 36, 18, 54, 0, 72 };
49 static const uint8_t shuf2[] = { 24, 12, 36, 0, 48 };
50 static const uint8_t shuf3[] = { 18, 9, 27, 0, 36 };
51
52 static const uint8_t l_start[] = { 0, 4, 9, 13, 18, 22, 27, 31, 36, 40 };
53 static const uint8_t l_start_shuffled[] = { 9, 4, 13, 0, 18 };
54
55 static const uint8_t serpent1[] = {
56 0, 1, 2, 2, 1, 0,
57 0, 1, 2, 2, 1, 0,
58 0, 1, 2, 2, 1, 0,
59 0, 1, 2, 2, 1, 0,
60 0, 1, 2
61 };
62 static const uint8_t serpent2[] = {
63 0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
64 0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
65 0, 1, 2, 3, 4, 5
66 };
67
68 static const uint8_t remap[][2] = {
69 { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, /* dummy */
70 { 0, 0 }, { 0, 1 }, { 0, 2 }, { 0, 3 }, { 10, 0 },
71 { 10, 1 }, { 10, 2 }, { 10, 3 }, { 20, 0 }, { 20, 1 },
72 { 20, 2 }, { 20, 3 }, { 30, 0 }, { 30, 1 }, { 30, 2 },
73 { 30, 3 }, { 40, 0 }, { 40, 1 }, { 40, 2 }, { 40, 3 },
74 { 50, 0 }, { 50, 1 }, { 50, 2 }, { 50, 3 }, { 60, 0 },
75 { 60, 1 }, { 60, 2 }, { 60, 3 }, { 70, 0 }, { 70, 1 },
76 { 70, 2 }, { 70, 3 }, { 0, 64 }, { 0, 65 }, { 0, 66 },
77 { 10, 64 }, { 10, 65 }, { 10, 66 }, { 20, 64 }, { 20, 65 },
78 { 20, 66 }, { 30, 64 }, { 30, 65 }, { 30, 66 }, { 40, 64 },
79 { 40, 65 }, { 40, 66 }, { 50, 64 }, { 50, 65 }, { 50, 66 },
80 { 60, 64 }, { 60, 65 }, { 60, 66 }, { 70, 64 }, { 70, 65 },
81 { 70, 66 }, { 0, 67 }, { 20, 67 }, { 40, 67 }, { 60, 67 }
82 };
83
84 int i, k, m;
85 int x, y, blk;
86
87
2/2
✓ Branch 0 taken 217890 times.
✓ Branch 1 taken 43578 times.
261468 for (m = 0; m < 5; m++) {
88
3/5
✓ Branch 0 taken 72900 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 35100 times.
✓ Branch 3 taken 109890 times.
✗ Branch 4 not taken.
217890 switch (d->width) {
89 72900 case 1440:
90 72900 blk = (chan * 11 + seq) * 27 + slot;
91
92
4/4
✓ Branch 0 taken 19440 times.
✓ Branch 1 taken 53460 times.
✓ Branch 2 taken 1620 times.
✓ Branch 3 taken 17820 times.
72900 if (chan == 0 && seq == 11) {
93 1620 x = m * 27 + slot;
94
2/2
✓ Branch 0 taken 1080 times.
✓ Branch 1 taken 540 times.
1620 if (x < 90) {
95 1080 y = 0;
96 } else {
97 540 x = (x - 90) * 2;
98 540 y = 67;
99 }
100 } else {
101 71280 i = (4 * chan + blk + off[m]) % 11;
102 71280 k = (blk / 11) % 27;
103
104 71280 x = shuf1[m] + (chan & 1) * 9 + k % 9;
105 71280 y = (i * 3 + k / 9) * 2 + (chan >> 1) + 1;
106 }
107 72900 tbl[m] = (x << 1) | (y << 9);
108 72900 break;
109 case 1280:
110 blk = (chan * 10 + seq) * 27 + slot;
111
112 i = (4 * chan + (seq / 5) + 2 * blk + off[m]) % 10;
113 k = (blk / 5) % 27;
114
115 x = shuf1[m] + (chan & 1) * 9 + k % 9;
116 y = (i * 3 + k / 9) * 2 + (chan >> 1) + 4;
117
118 if (x >= 80) {
119 x = remap[y][0] + ((x - 80) << (y > 59));
120 y = remap[y][1];
121 }
122 tbl[m] = (x << 1) | (y << 9);
123 break;
124 35100 case 960:
125 35100 blk = (chan * 10 + seq) * 27 + slot;
126
127 35100 i = (4 * chan + (seq / 5) + 2 * blk + off[m]) % 10;
128 35100 k = (blk / 5) % 27 + (i & 1) * 3;
129
130 35100 x = shuf2[m] + k % 6 + 6 * (chan & 1);
131 35100 y = l_start[i] + k / 6 + 45 * (chan >> 1);
132 35100 tbl[m] = (x << 1) | (y << 9);
133 35100 break;
134 109890 case 720:
135
3/4
✓ Branch 0 taken 45360 times.
✓ Branch 1 taken 38880 times.
✓ Branch 2 taken 25650 times.
✗ Branch 3 not taken.
109890 switch (d->pix_fmt) {
136 45360 case AV_PIX_FMT_YUV422P:
137 45360 x = shuf3[m] + slot / 3;
138 45360 y = serpent1[slot] +
139 45360 ((((seq + off[m]) % d->difseg_size) << 1) + chan) * 3;
140 45360 tbl[m] = (x << 1) | (y << 8);
141 45360 break;
142 38880 case AV_PIX_FMT_YUV420P:
143 38880 x = shuf3[m] + slot / 3;
144 38880 y = serpent1[slot] +
145 38880 ((seq + off[m]) % d->difseg_size) * 3;
146 38880 tbl[m] = (x << 1) | (y << 9);
147 38880 break;
148 25650 case AV_PIX_FMT_YUV411P:
149 25650 i = (seq + off[m]) % d->difseg_size;
150
4/4
✓ Branch 0 taken 20520 times.
✓ Branch 1 taken 5130 times.
✓ Branch 2 taken 5130 times.
✓ Branch 3 taken 15390 times.
25650 k = slot + ((m == 1 || m == 2) ? 3 : 0);
151
152 25650 x = l_start_shuffled[m] + k / 6;
153 25650 y = serpent2[k] + i * 6;
154
2/2
✓ Branch 0 taken 570 times.
✓ Branch 1 taken 25080 times.
25650 if (x > 21)
155 570 y = y * 2 - i * 6;
156 25650 tbl[m] = (x << 2) | (y << 8);
157 25650 break;
158 }
159 default:
160 109890 break;
161 }
162 }
163 43578 }
164
165 80 int ff_dv_init_dynamic_tables(DVVideoContext *ctx, const AVDVProfile *d)
166 {
167 int j, i, c, s, p;
168
169 80 p = i = 0;
170
2/2
✓ Branch 0 taken 143 times.
✓ Branch 1 taken 80 times.
223 for (c = 0; c < d->n_difchan; c++) {
171
2/2
✓ Branch 0 taken 1702 times.
✓ Branch 1 taken 143 times.
1845 for (s = 0; s < d->difseg_size; s++) {
172 1702 p += 6;
173
2/2
✓ Branch 0 taken 45954 times.
✓ Branch 1 taken 1702 times.
47656 for (j = 0; j < 27; j++) {
174 45954 p += !(j % 3);
175
7/8
✓ Branch 0 taken 15552 times.
✓ Branch 1 taken 30402 times.
✓ Branch 2 taken 15552 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 11664 times.
✓ Branch 5 taken 3888 times.
✓ Branch 6 taken 10692 times.
✓ Branch 7 taken 972 times.
45954 if (!(DV_PROFILE_IS_1080i50(d) && c != 0 && s == 11) &&
176
5/6
✓ Branch 0 taken 8424 times.
✓ Branch 1 taken 36558 times.
✓ Branch 2 taken 8424 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 7020 times.
✓ Branch 5 taken 1404 times.
44982 !(DV_PROFILE_IS_720p50(d) && s > 9)) {
177 43578 dv_calc_mb_coordinates(d, c, s, j, &ctx->work_chunks[i].mb_coordinates[0]);
178 43578 ctx->work_chunks[i++].buf_offset = p;
179 }
180 45954 p += 5;
181 }
182 }
183 }
184
185 80 return 0;
186 }
187
188 82 av_cold int ff_dvvideo_init(AVCodecContext *avctx)
189 {
190 82 DVVideoContext *s = avctx->priv_data;
191
192 82 s->avctx = avctx;
193 82 avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
194
195 82 return 0;
196 }
197