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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 | ||
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 | ||
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 = CODEC_CAP_DR1, | |
131 | }; |