FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/012v.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 66 77 85.7%
Functions: 2 2 100.0%
Branches: 21 36 58.3%
Line Branch Exec Source
1 /*
2 * 012v decoder
3 *
4 * Copyright (C) 2012 Carl Eugen Hoyos
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 "avcodec.h"
24 #include "codec_internal.h"
25 #include "decode.h"
26 #include "libavutil/intreadwrite.h"
27
28 2 static av_cold int zero12v_decode_init(AVCodecContext *avctx)
29 {
30 2 avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
31 2 avctx->bits_per_raw_sample = 10;
32
33
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 2 if (avctx->codec_tag == MKTAG('a', '1', '2', 'v'))
34 ✗ avpriv_request_sample(avctx, "transparency");
35
36 2 return 0;
37 }
38
39 1 static int zero12v_decode_frame(AVCodecContext *avctx, AVFrame *pic,
40 int *got_frame, AVPacket *avpkt)
41 {
42 int line, ret;
43 1 const int width = avctx->width;
44 uint16_t *y, *u, *v;
45 1 const uint8_t *line_end, *src = avpkt->data;
46 1 int stride = avctx->width * 8 / 3;
47
48
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 1 if (width <= 1 || avctx->height <= 0) {
49 ✗ av_log(avctx, AV_LOG_ERROR, "Dimensions %dx%d not supported.\n", width, avctx->height);
50 ✗ return AVERROR_INVALIDDATA;
51 }
52
53
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 1 if ( avctx->codec_tag == MKTAG('0', '1', '2', 'v')
54
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 1 && avpkt->size % avctx->height == 0
55
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 1 && avpkt->size / avctx->height * 3 >= width * 8)
56 1 stride = avpkt->size / avctx->height;
57
58
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 1 if (avpkt->size < avctx->height * stride) {
59 ✗ av_log(avctx, AV_LOG_ERROR, "Packet too small: %d instead of %d\n",
60 ✗ avpkt->size, avctx->height * stride);
61 ✗ return AVERROR_INVALIDDATA;
62 }
63
64
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 1 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
65 ✗ return ret;
66
67 1 line_end = avpkt->data + stride;
68
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 241 for (line = 0; line < avctx->height; line++) {
69 240 uint16_t y_temp[6] = {0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000};
70 240 uint16_t u_temp[3] = {0x8000, 0x8000, 0x8000};
71 240 uint16_t v_temp[3] = {0x8000, 0x8000, 0x8000};
72 int x;
73 240 y = (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
74 240 u = (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
75 240 v = (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
76
77
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 12720 for (x = 0; x < width; x += 6) {
78 uint32_t t;
79
80
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 12720 if (width - x < 6 || line_end - src < 16) {
81 240 y = y_temp;
82 240 u = u_temp;
83 240 v = v_temp;
84 }
85
86
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 12720 if (line_end - src < 4)
87 ✗ break;
88
89 12720 t = AV_RL32(src);
90 12720 src += 4;
91 12720 *u++ = t << 6 & 0xFFC0;
92 12720 *y++ = t >> 4 & 0xFFC0;
93 12720 *v++ = t >> 14 & 0xFFC0;
94
95
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 12720 if (line_end - src < 4)
96 ✗ break;
97
98 12720 t = AV_RL32(src);
99 12720 src += 4;
100 12720 *y++ = t << 6 & 0xFFC0;
101 12720 *u++ = t >> 4 & 0xFFC0;
102 12720 *y++ = t >> 14 & 0xFFC0;
103
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 12720 if (line_end - src < 4)
105 ✗ break;
106
107 12720 t = AV_RL32(src);
108 12720 src += 4;
109 12720 *v++ = t << 6 & 0xFFC0;
110 12720 *y++ = t >> 4 & 0xFFC0;
111 12720 *u++ = t >> 14 & 0xFFC0;
112
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 12720 if (line_end - src < 4)
114 ✗ break;
115
116 12720 t = AV_RL32(src);
117 12720 src += 4;
118 12720 *y++ = t << 6 & 0xFFC0;
119 12720 *v++ = t >> 4 & 0xFFC0;
120 12720 *y++ = t >> 14 & 0xFFC0;
121
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 12720 if (width - x < 6)
123 240 break;
124 }
125
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 240 if (x < width) {
127 240 y = x + (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
128 240 u = x/2 + (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
129 240 v = x/2 + (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
130 240 memcpy(y, y_temp, sizeof(*y) * (width - x));
131 240 memcpy(u, u_temp, sizeof(*u) * ((width - x + 1) / 2));
132 240 memcpy(v, v_temp, sizeof(*v) * ((width - x + 1) / 2));
133 }
134
135 240 line_end += stride;
136 240 src = line_end - stride;
137 }
138
139 1 *got_frame = 1;
140
141 1 return avpkt->size;
142 }
143
144 const FFCodec ff_zero12v_decoder = {
145 .p.name = "012v",
146 CODEC_LONG_NAME("Uncompressed 4:2:2 10-bit"),
147 .p.type = AVMEDIA_TYPE_VIDEO,
148 .p.id = AV_CODEC_ID_012V,
149 .init = zero12v_decode_init,
150 FF_CODEC_DECODE_CB(zero12v_decode_frame),
151 .p.capabilities = AV_CODEC_CAP_DR1,
152 };
153