FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/012v.c
Date: 2021-09-26 18:22:30
Exec Total Coverage
Lines: 69 80 86.2%
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 "internal.h"
25 #include "libavutil/intreadwrite.h"
26
27 2 static av_cold int zero12v_decode_init(AVCodecContext *avctx)
28 {
29 2 avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
30 2 avctx->bits_per_raw_sample = 10;
31
32
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2 if (avctx->codec_tag == MKTAG('a', '1', '2', 'v'))
33 avpriv_request_sample(avctx, "transparency");
34
35 2 return 0;
36 }
37
38 1 static int zero12v_decode_frame(AVCodecContext *avctx, void *data,
39 int *got_frame, AVPacket *avpkt)
40 {
41 int line, ret;
42 1 const int width = avctx->width;
43 1 AVFrame *pic = data;
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 pic->pict_type = AV_PICTURE_TYPE_I;
68 1 pic->key_frame = 1;
69
70 1 line_end = avpkt->data + stride;
71
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241 for (line = 0; line < avctx->height; line++) {
72 240 uint16_t y_temp[6] = {0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000};
73 240 uint16_t u_temp[3] = {0x8000, 0x8000, 0x8000};
74 240 uint16_t v_temp[3] = {0x8000, 0x8000, 0x8000};
75 int x;
76 240 y = (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
77 240 u = (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
78 240 v = (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
79
80
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12720 for (x = 0; x < width; x += 6) {
81 uint32_t t;
82
83
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12720 if (width - x < 6 || line_end - src < 16) {
84 240 y = y_temp;
85 240 u = u_temp;
86 240 v = v_temp;
87 }
88
89
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12720 if (line_end - src < 4)
90 break;
91
92 12720 t = AV_RL32(src);
93 12720 src += 4;
94 12720 *u++ = t << 6 & 0xFFC0;
95 12720 *y++ = t >> 4 & 0xFFC0;
96 12720 *v++ = t >> 14 & 0xFFC0;
97
98
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12720 if (line_end - src < 4)
99 break;
100
101 12720 t = AV_RL32(src);
102 12720 src += 4;
103 12720 *y++ = t << 6 & 0xFFC0;
104 12720 *u++ = t >> 4 & 0xFFC0;
105 12720 *y++ = t >> 14 & 0xFFC0;
106
107
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12720 if (line_end - src < 4)
108 break;
109
110 12720 t = AV_RL32(src);
111 12720 src += 4;
112 12720 *v++ = t << 6 & 0xFFC0;
113 12720 *y++ = t >> 4 & 0xFFC0;
114 12720 *u++ = t >> 14 & 0xFFC0;
115
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12720 if (line_end - src < 4)
117 break;
118
119 12720 t = AV_RL32(src);
120 12720 src += 4;
121 12720 *y++ = t << 6 & 0xFFC0;
122 12720 *v++ = t >> 4 & 0xFFC0;
123 12720 *y++ = t >> 14 & 0xFFC0;
124
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12720 if (width - x < 6)
126 240 break;
127 }
128
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240 if (x < width) {
130 240 y = x + (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
131 240 u = x/2 + (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
132 240 v = x/2 + (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
133 240 memcpy(y, y_temp, sizeof(*y) * (width - x));
134 240 memcpy(u, u_temp, sizeof(*u) * (width - x + 1) / 2);
135 240 memcpy(v, v_temp, sizeof(*v) * (width - x + 1) / 2);
136 }
137
138 240 line_end += stride;
139 240 src = line_end - stride;
140 }
141
142 1 *got_frame = 1;
143
144 1 return avpkt->size;
145 }
146
147 const AVCodec ff_zero12v_decoder = {
148 .name = "012v",
149 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
150 .type = AVMEDIA_TYPE_VIDEO,
151 .id = AV_CODEC_ID_012V,
152 .init = zero12v_decode_init,
153 .decode = zero12v_decode_frame,
154 .capabilities = AV_CODEC_CAP_DR1,
155 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
156 };
157