blob: 48fab682735fd8ec7adc957f279500b3a70a59be
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 = AV_CODEC_CAP_DR1, |
98 | }; |
99 |