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
|
/*
* V210 encoder
*
* Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
#include "bytestream.h"
static av_cold int encode_init(AVCodecContext *avctx)
{
if (avctx->width & 1) {
av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
return AVERROR(EINVAL);
}
if (avctx->pix_fmt != PIX_FMT_YUV422P10) {
av_log(avctx, AV_LOG_ERROR, "v210 needs YUV422P10\n");
return -1;
}
if (avctx->bits_per_raw_sample != 10)
av_log(avctx, AV_LOG_WARNING, "bits per raw sample: %d != 10-bit\n",
avctx->bits_per_raw_sample);
avctx->coded_frame = avcodec_alloc_frame();
if (!avctx->coded_frame)
return AVERROR(ENOMEM);
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
return 0;
}
static int encode_frame(AVCodecContext *avctx, unsigned char *buf,
int buf_size, void *data)
{
const AVFrame *pic = data;
int aligned_width = ((avctx->width + 47) / 48) * 48;
int stride = aligned_width * 8 / 3;
int h, w;
const uint16_t *y = (const uint16_t*)pic->data[0];
const uint16_t *u = (const uint16_t*)pic->data[1];
const uint16_t *v = (const uint16_t*)pic->data[2];
uint8_t *p = buf;
uint8_t *pdst = buf;
if (buf_size < avctx->height * stride) {
av_log(avctx, AV_LOG_ERROR, "output buffer too small\n");
return AVERROR(ENOMEM);
}
#define CLIP(v) av_clip(v, 4, 1019)
#define WRITE_PIXELS(a, b, c) \
do { \
val = CLIP(*a++); \
val |= (CLIP(*b++) << 10) | \
(CLIP(*c++) << 20); \
bytestream_put_le32(&p, val); \
} while (0)
for (h = 0; h < avctx->height; h++) {
uint32_t val;
for (w = 0; w < avctx->width - 5; w += 6) {
WRITE_PIXELS(u, y, v);
WRITE_PIXELS(y, u, y);
WRITE_PIXELS(v, y, u);
WRITE_PIXELS(y, v, y);
}
if (w < avctx->width - 1) {
WRITE_PIXELS(u, y, v);
val = CLIP(*y++);
if (w == avctx->width - 2)
bytestream_put_le32(&p, val);
}
if (w < avctx->width - 3) {
val |= (CLIP(*u++) << 10) | (CLIP(*y++) << 20);
bytestream_put_le32(&p, val);
val = CLIP(*v++) | (CLIP(*y++) << 10);
bytestream_put_le32(&p, val);
}
pdst += stride;
memset(p, 0, pdst - p);
p = pdst;
y += pic->linesize[0] / 2 - avctx->width;
u += pic->linesize[1] / 2 - avctx->width / 2;
v += pic->linesize[2] / 2 - avctx->width / 2;
}
return p - buf;
}
static av_cold int encode_close(AVCodecContext *avctx)
{
av_freep(&avctx->coded_frame);
return 0;
}
AVCodec ff_v210_encoder = {
.name = "v210",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_V210,
.init = encode_init,
.encode = encode_frame,
.close = encode_close,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV422P10, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
};
|
