1 /*
2 * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "avcodec.h"
22 #include "internal.h"
23 #include "libavutil/bswap.h"
24 #include "libavutil/internal.h"
25 #include "libavutil/mem.h"
26
decode_init(AVCodecContext * avctx)27 static av_cold int decode_init(AVCodecContext *avctx)
28 {
29 if (avctx->width & 1) {
30 av_log(avctx, AV_LOG_ERROR, "v210x needs even width\n");
31 return AVERROR(EINVAL);
32 }
33 avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
34 avctx->bits_per_raw_sample = 10;
35
36 return 0;
37 }
38
decode_frame(AVCodecContext * avctx,void * data,int * got_frame,AVPacket * avpkt)39 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
40 AVPacket *avpkt)
41 {
42 const uint32_t *src = (const uint32_t *)avpkt->data;
43 AVFrame *pic = data;
44 int width = avctx->width;
45 int y = 0;
46 uint16_t *ydst, *udst, *vdst, *yend;
47 int ret;
48
49 if (avpkt->size < avctx->width * avctx->height * 8 / 3) {
50 av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
51 return AVERROR_INVALIDDATA;
52 }
53
54 if (avpkt->size > avctx->width * avctx->height * 8 / 3) {
55 avpriv_request_sample(avctx, "(Probably) padded data");
56 }
57
58 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
59 return ret;
60
61 ydst = (uint16_t *)pic->data[0];
62 udst = (uint16_t *)pic->data[1];
63 vdst = (uint16_t *)pic->data[2];
64 yend = ydst + width;
65 pic->pict_type = AV_PICTURE_TYPE_I;
66 pic->key_frame = 1;
67
68 for (;;) {
69 uint32_t v = av_be2ne32(*src++);
70 *udst++ = (v >> 16) & 0xFFC0;
71 *ydst++ = (v >> 6 ) & 0xFFC0;
72 *vdst++ = (v << 4 ) & 0xFFC0;
73
74 v = av_be2ne32(*src++);
75 *ydst++ = (v >> 16) & 0xFFC0;
76
77 if (ydst >= yend) {
78 ydst += pic->linesize[0] / 2 - width;
79 udst += pic->linesize[1] / 2 - width / 2;
80 vdst += pic->linesize[2] / 2 - width / 2;
81 yend = ydst + width;
82 if (++y >= avctx->height)
83 break;
84 }
85
86 *udst++ = (v >> 6 ) & 0xFFC0;
87 *ydst++ = (v << 4 ) & 0xFFC0;
88
89 v = av_be2ne32(*src++);
90 *vdst++ = (v >> 16) & 0xFFC0;
91 *ydst++ = (v >> 6 ) & 0xFFC0;
92
93 if (ydst >= yend) {
94 ydst += pic->linesize[0] / 2 - width;
95 udst += pic->linesize[1] / 2 - width / 2;
96 vdst += pic->linesize[2] / 2 - width / 2;
97 yend = ydst + width;
98 if (++y >= avctx->height)
99 break;
100 }
101
102 *udst++ = (v << 4 ) & 0xFFC0;
103
104 v = av_be2ne32(*src++);
105 *ydst++ = (v >> 16) & 0xFFC0;
106 *vdst++ = (v >> 6 ) & 0xFFC0;
107 *ydst++ = (v << 4 ) & 0xFFC0;
108 if (ydst >= yend) {
109 ydst += pic->linesize[0] / 2 - width;
110 udst += pic->linesize[1] / 2 - width / 2;
111 vdst += pic->linesize[2] / 2 - width / 2;
112 yend = ydst + width;
113 if (++y >= avctx->height)
114 break;
115 }
116 }
117
118 *got_frame = 1;
119
120 return avpkt->size;
121 }
122
123 AVCodec ff_v210x_decoder = {
124 .name = "v210x",
125 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
126 .type = AVMEDIA_TYPE_VIDEO,
127 .id = AV_CODEC_ID_V210X,
128 .init = decode_init,
129 .decode = decode_frame,
130 .capabilities = AV_CODEC_CAP_DR1,
131 };
132