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2ba45a60 DM |
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 = CODEC_CAP_DR1, | |
83 | }; |