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
|
/*
* y41p decoder
*
* Copyright (c) 2012 Paul B Mahol
*
* 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"
static av_cold int y41p_decode_init(AVCodecContext *avctx)
{
avctx->pix_fmt = AV_PIX_FMT_YUV411P;
avctx->bits_per_raw_sample = 12;
if (avctx->width & 7) {
av_log(avctx, AV_LOG_WARNING, "y41p requires width to be divisible by 8.\n");
}
return 0;
}
static int y41p_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
AVFrame *pic = data;
uint8_t *src = avpkt->data;
uint8_t *y, *u, *v;
int i, j, ret;
if (avpkt->size < 3LL * avctx->height * FFALIGN(avctx->width, 8) / 2) {
av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
return AVERROR(EINVAL);
}
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
return ret;
pic->key_frame = 1;
pic->pict_type = AV_PICTURE_TYPE_I;
for (i = avctx->height - 1; i >= 0 ; i--) {
y = &pic->data[0][i * pic->linesize[0]];
u = &pic->data[1][i * pic->linesize[1]];
v = &pic->data[2][i * pic->linesize[2]];
for (j = 0; j < avctx->width; j += 8) {
*(u++) = *src++;
*(y++) = *src++;
*(v++) = *src++;
*(y++) = *src++;
*(u++) = *src++;
*(y++) = *src++;
*(v++) = *src++;
*(y++) = *src++;
*(y++) = *src++;
*(y++) = *src++;
*(y++) = *src++;
*(y++) = *src++;
}
}
*got_frame = 1;
return avpkt->size;
}
const AVCodec ff_y41p_decoder = {
.name = "y41p",
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_Y41P,
.init = y41p_decode_init,
.decode = y41p_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
|
