blob: 21b3d35d672214f72423da26336e0eefc9448535
1 | /* |
2 | * Pinnacle TARGA CineWave YUV16 decoder |
3 | * Copyright (c) 2012 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 y216_decode_init(AVCodecContext *avctx) |
26 | { |
27 | avctx->pix_fmt = AV_PIX_FMT_YUV422P16; |
28 | avctx->bits_per_raw_sample = 14; |
29 | |
30 | return 0; |
31 | } |
32 | |
33 | static int y216_decode_frame(AVCodecContext *avctx, void *data, |
34 | int *got_frame, AVPacket *avpkt) |
35 | { |
36 | AVFrame *pic = data; |
37 | const uint16_t *src = (uint16_t *)avpkt->data; |
38 | uint16_t *y, *u, *v, aligned_width = FFALIGN(avctx->width, 4); |
39 | int i, j, ret; |
40 | |
41 | if (avpkt->size < 4 * avctx->height * aligned_width) { |
42 | av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n"); |
43 | return AVERROR(EINVAL); |
44 | } |
45 | |
46 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
47 | return ret; |
48 | |
49 | pic->key_frame = 1; |
50 | pic->pict_type = AV_PICTURE_TYPE_I; |
51 | |
52 | y = (uint16_t *)pic->data[0]; |
53 | u = (uint16_t *)pic->data[1]; |
54 | v = (uint16_t *)pic->data[2]; |
55 | |
56 | for (i = 0; i < avctx->height; i++) { |
57 | for (j = 0; j < avctx->width >> 1; j++) { |
58 | u[ j ] = src[4 * j ] << 2 | src[4 * j ] >> 14; |
59 | y[2 * j ] = src[4 * j + 1] << 2 | src[4 * j + 1] >> 14; |
60 | v[ j ] = src[4 * j + 2] << 2 | src[4 * j + 2] >> 14; |
61 | y[2 * j + 1] = src[4 * j + 3] << 2 | src[4 * j + 3] >> 14; |
62 | } |
63 | |
64 | y += pic->linesize[0] >> 1; |
65 | u += pic->linesize[1] >> 1; |
66 | v += pic->linesize[2] >> 1; |
67 | src += aligned_width << 1; |
68 | } |
69 | |
70 | *got_frame = 1; |
71 | |
72 | return avpkt->size; |
73 | } |
74 | |
75 | AVCodec ff_targa_y216_decoder = { |
76 | .name = "targa_y216", |
77 | .long_name = NULL_IF_CONFIG_SMALL("Pinnacle TARGA CineWave YUV16"), |
78 | .type = AVMEDIA_TYPE_VIDEO, |
79 | .id = AV_CODEC_ID_TARGA_Y216, |
80 | .init = y216_decode_init, |
81 | .decode = y216_decode_frame, |
82 | .capabilities = AV_CODEC_CAP_DR1, |
83 | }; |
84 |