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1 | /* |
2 | * v410 decoder | |
3 | * | |
4 | * Copyright (c) 2011 Derek Buitenhuis | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
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. | |
12 | * | |
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. | |
17 | * | |
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 | |
21 | */ | |
22 | ||
23 | #include "libavutil/common.h" | |
24 | #include "libavutil/intreadwrite.h" | |
25 | #include "avcodec.h" | |
26 | #include "internal.h" | |
27 | ||
28 | static av_cold int v410_decode_init(AVCodecContext *avctx) | |
29 | { | |
30 | avctx->pix_fmt = AV_PIX_FMT_YUV444P10; | |
31 | avctx->bits_per_raw_sample = 10; | |
32 | ||
33 | if (avctx->width & 1) { | |
34 | if (avctx->err_recognition & AV_EF_EXPLODE) { | |
35 | av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n"); | |
36 | return AVERROR_INVALIDDATA; | |
37 | } else { | |
38 | av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n"); | |
39 | } | |
40 | } | |
41 | ||
42 | return 0; | |
43 | } | |
44 | ||
45 | static int v410_decode_frame(AVCodecContext *avctx, void *data, | |
46 | int *got_frame, AVPacket *avpkt) | |
47 | { | |
48 | AVFrame *pic = data; | |
49 | uint8_t *src = avpkt->data; | |
50 | uint16_t *y, *u, *v; | |
51 | uint32_t val; | |
52 | int i, j, ret; | |
53 | ||
54 | if (avpkt->size < 4 * avctx->height * avctx->width) { | |
55 | av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n"); | |
56 | return AVERROR(EINVAL); | |
57 | } | |
58 | ||
59 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) | |
60 | return ret; | |
61 | ||
62 | pic->key_frame = 1; | |
63 | pic->pict_type = AV_PICTURE_TYPE_I; | |
64 | ||
65 | y = (uint16_t *)pic->data[0]; | |
66 | u = (uint16_t *)pic->data[1]; | |
67 | v = (uint16_t *)pic->data[2]; | |
68 | ||
69 | for (i = 0; i < avctx->height; i++) { | |
70 | for (j = 0; j < avctx->width; j++) { | |
71 | val = AV_RL32(src); | |
72 | ||
73 | u[j] = (val >> 2) & 0x3FF; | |
74 | y[j] = (val >> 12) & 0x3FF; | |
75 | v[j] = (val >> 22); | |
76 | ||
77 | src += 4; | |
78 | } | |
79 | ||
80 | y += pic->linesize[0] >> 1; | |
81 | u += pic->linesize[1] >> 1; | |
82 | v += pic->linesize[2] >> 1; | |
83 | } | |
84 | ||
85 | *got_frame = 1; | |
86 | ||
87 | return avpkt->size; | |
88 | } | |
89 | ||
90 | AVCodec ff_v410_decoder = { | |
91 | .name = "v410", | |
92 | .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"), | |
93 | .type = AVMEDIA_TYPE_VIDEO, | |
94 | .id = AV_CODEC_ID_V410, | |
95 | .init = v410_decode_init, | |
96 | .decode = v410_decode_frame, | |
97 | .capabilities = CODEC_CAP_DR1, | |
98 | }; |