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
25static 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
35static 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
75AVCodec 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};
84