blob: dd53fbded4993769ddfbfa3284c9e31d885ecd36
1 | /* |
2 | * v308 decoder |
3 | * Copyright (c) 2011 Carl Eugen Hoyos |
4 | * |
5 | * This file is part of FFmpeg. |
6 | * |
7 | * FFmpeg is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Lesser General Public |
9 | * License as published by the Free Software Foundation; either |
10 | * version 2.1 of the License, or (at your option) any later version. |
11 | * |
12 | * FFmpeg is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Lesser General Public |
18 | * License along with FFmpeg; if not, write to the Free Software |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | */ |
21 | |
22 | #include "avcodec.h" |
23 | #include "internal.h" |
24 | |
25 | static av_cold int v308_decode_init(AVCodecContext *avctx) |
26 | { |
27 | avctx->pix_fmt = AV_PIX_FMT_YUV444P; |
28 | |
29 | if (avctx->width & 1) |
30 | av_log(avctx, AV_LOG_WARNING, "v308 requires width to be even.\n"); |
31 | |
32 | return 0; |
33 | } |
34 | |
35 | static int v308_decode_frame(AVCodecContext *avctx, void *data, |
36 | int *got_frame, AVPacket *avpkt) |
37 | { |
38 | AVFrame *pic = data; |
39 | const uint8_t *src = avpkt->data; |
40 | uint8_t *y, *u, *v; |
41 | int i, j, ret; |
42 | |
43 | if (avpkt->size < 3 * avctx->height * avctx->width) { |
44 | av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n"); |
45 | return AVERROR(EINVAL); |
46 | } |
47 | |
48 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
49 | return ret; |
50 | |
51 | pic->key_frame = 1; |
52 | pic->pict_type = AV_PICTURE_TYPE_I; |
53 | |
54 | y = pic->data[0]; |
55 | u = pic->data[1]; |
56 | v = pic->data[2]; |
57 | |
58 | for (i = 0; i < avctx->height; i++) { |
59 | for (j = 0; j < avctx->width; j++) { |
60 | v[j] = *src++; |
61 | y[j] = *src++; |
62 | u[j] = *src++; |
63 | } |
64 | |
65 | y += pic->linesize[0]; |
66 | u += pic->linesize[1]; |
67 | v += pic->linesize[2]; |
68 | } |
69 | |
70 | *got_frame = 1; |
71 | |
72 | return avpkt->size; |
73 | } |
74 | |
75 | AVCodec ff_v308_decoder = { |
76 | .name = "v308", |
77 | .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:4:4"), |
78 | .type = AVMEDIA_TYPE_VIDEO, |
79 | .id = AV_CODEC_ID_V308, |
80 | .init = v308_decode_init, |
81 | .decode = v308_decode_frame, |
82 | .capabilities = AV_CODEC_CAP_DR1, |
83 | }; |
84 |