Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / v410dec.c
CommitLineData
2ba45a60
DM
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
28static 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
45static 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
90AVCodec 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};