4 * Copyright (C) 2012 Carl Eugen Hoyos
6 * This file is part of FFmpeg.
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.
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.
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
25 #include "libavutil/intreadwrite.h"
27 static av_cold
int zero12v_decode_init(AVCodecContext
*avctx
)
29 avctx
->pix_fmt
= AV_PIX_FMT_YUV422P16
;
30 avctx
->bits_per_raw_sample
= 10;
32 if (avctx
->codec_tag
== MKTAG('a', '1', '2', 'v'))
33 avpriv_request_sample(avctx
, "transparency");
38 static int zero12v_decode_frame(AVCodecContext
*avctx
, void *data
,
39 int *got_frame
, AVPacket
*avpkt
)
42 const int width
= avctx
->width
;
45 const uint8_t *line_end
, *src
= avpkt
->data
;
46 int stride
= avctx
->width
* 8 / 3;
49 av_log(avctx
, AV_LOG_ERROR
, "Width 1 not supported.\n");
50 return AVERROR_INVALIDDATA
;
53 if ( avctx
->codec_tag
== MKTAG('0', '1', '2', 'v')
54 && avpkt
->size
% avctx
->height
== 0
55 && avpkt
->size
/ avctx
->height
* 3 >= width
* 8)
56 stride
= avpkt
->size
/ avctx
->height
;
58 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
;
64 if ((ret
= ff_get_buffer(avctx
, pic
, 0)) < 0)
67 pic
->pict_type
= AV_PICTURE_TYPE_I
;
70 y
= (uint16_t *)pic
->data
[0];
71 u
= (uint16_t *)pic
->data
[1];
72 v
= (uint16_t *)pic
->data
[2];
73 line_end
= avpkt
->data
+ stride
;
75 while (line
++ < avctx
->height
) {
77 uint32_t t
= AV_RL32(src
);
79 *u
++ = t
<< 6 & 0xFFC0;
80 *y
++ = t
>> 4 & 0xFFC0;
81 *v
++ = t
>> 14 & 0xFFC0;
83 if (src
>= line_end
- 1) {
87 y
= (uint16_t *)(pic
->data
[0] + line
* pic
->linesize
[0]);
88 u
= (uint16_t *)(pic
->data
[1] + line
* pic
->linesize
[1]);
89 v
= (uint16_t *)(pic
->data
[2] + line
* pic
->linesize
[2]);
95 *y
++ = t
<< 6 & 0xFFC0;
96 *u
++ = t
>> 4 & 0xFFC0;
97 *y
++ = t
>> 14 & 0xFFC0;
98 if (src
>= line_end
- 2) {
104 y
= (uint16_t *)(pic
->data
[0] + line
* pic
->linesize
[0]);
105 u
= (uint16_t *)(pic
->data
[1] + line
* pic
->linesize
[1]);
106 v
= (uint16_t *)(pic
->data
[2] + line
* pic
->linesize
[2]);
112 *v
++ = t
<< 6 & 0xFFC0;
113 *y
++ = t
>> 4 & 0xFFC0;
114 *u
++ = t
>> 14 & 0xFFC0;
116 if (src
>= line_end
- 1) {
120 y
= (uint16_t *)(pic
->data
[0] + line
* pic
->linesize
[0]);
121 u
= (uint16_t *)(pic
->data
[1] + line
* pic
->linesize
[1]);
122 v
= (uint16_t *)(pic
->data
[2] + line
* pic
->linesize
[2]);
128 *y
++ = t
<< 6 & 0xFFC0;
129 *v
++ = t
>> 4 & 0xFFC0;
130 *y
++ = t
>> 14 & 0xFFC0;
132 if (src
>= line_end
- 2) {
138 y
= (uint16_t *)(pic
->data
[0] + line
* pic
->linesize
[0]);
139 u
= (uint16_t *)(pic
->data
[1] + line
* pic
->linesize
[1]);
140 v
= (uint16_t *)(pic
->data
[2] + line
* pic
->linesize
[2]);
151 AVCodec ff_zero12v_decoder
= {
153 .long_name
= NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
154 .type
= AVMEDIA_TYPE_VIDEO
,
155 .id
= AV_CODEC_ID_012V
,
156 .init
= zero12v_decode_init
,
157 .decode
= zero12v_decode_frame
,
158 .capabilities
= CODEC_CAP_DR1
,