1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*
* 012v decoder
*
* Copyright (C) 2012 Carl Eugen Hoyos
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
#include "internal.h"
#include "libavutil/intreadwrite.h"
static av_cold int zero12v_decode_init(AVCodecContext *avctx)
{
avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
avctx->bits_per_raw_sample = 10;
if (avctx->codec_tag == MKTAG('a', '1', '2', 'v'))
avpriv_request_sample(avctx, "transparency");
return 0;
}
static int zero12v_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
int line, ret;
const int width = avctx->width;
AVFrame *pic = data;
uint16_t *y, *u, *v;
const uint8_t *line_end, *src = avpkt->data;
int stride = avctx->width * 8 / 3;
if (width <= 1 || avctx->height <= 0) {
av_log(avctx, AV_LOG_ERROR, "Dimensions %dx%d not supported.\n", width, avctx->height);
return AVERROR_INVALIDDATA;
}
if ( avctx->codec_tag == MKTAG('0', '1', '2', 'v')
&& avpkt->size % avctx->height == 0
&& avpkt->size / avctx->height * 3 >= width * 8)
stride = avpkt->size / avctx->height;
if (avpkt->size < avctx->height * stride) {
av_log(avctx, AV_LOG_ERROR, "Packet too small: %d instead of %d\n",
avpkt->size, avctx->height * stride);
return AVERROR_INVALIDDATA;
}
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
return ret;
pic->pict_type = AV_PICTURE_TYPE_I;
pic->key_frame = 1;
line_end = avpkt->data + stride;
for (line = 0; line < avctx->height; line++) {
uint16_t y_temp[6] = {0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000};
uint16_t u_temp[3] = {0x8000, 0x8000, 0x8000};
uint16_t v_temp[3] = {0x8000, 0x8000, 0x8000};
int x;
y = (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
u = (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
v = (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
for (x = 0; x < width; x += 6) {
uint32_t t;
if (width - x < 6 || line_end - src < 16) {
y = y_temp;
u = u_temp;
v = v_temp;
}
if (line_end - src < 4)
break;
t = AV_RL32(src);
src += 4;
*u++ = t << 6 & 0xFFC0;
*y++ = t >> 4 & 0xFFC0;
*v++ = t >> 14 & 0xFFC0;
if (line_end - src < 4)
break;
t = AV_RL32(src);
src += 4;
*y++ = t << 6 & 0xFFC0;
*u++ = t >> 4 & 0xFFC0;
*y++ = t >> 14 & 0xFFC0;
if (line_end - src < 4)
break;
t = AV_RL32(src);
src += 4;
*v++ = t << 6 & 0xFFC0;
*y++ = t >> 4 & 0xFFC0;
*u++ = t >> 14 & 0xFFC0;
if (line_end - src < 4)
break;
t = AV_RL32(src);
src += 4;
*y++ = t << 6 & 0xFFC0;
*v++ = t >> 4 & 0xFFC0;
*y++ = t >> 14 & 0xFFC0;
if (width - x < 6)
break;
}
if (x < width) {
y = x + (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
u = x/2 + (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
v = x/2 + (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
memcpy(y, y_temp, sizeof(*y) * (width - x));
memcpy(u, u_temp, sizeof(*u) * ((width - x + 1) / 2));
memcpy(v, v_temp, sizeof(*v) * ((width - x + 1) / 2));
}
line_end += stride;
src = line_end - stride;
}
*got_frame = 1;
return avpkt->size;
}
const AVCodec ff_zero12v_decoder = {
.name = "012v",
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_012V,
.init = zero12v_decode_init,
.decode = zero12v_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
|
