1/*
2 * v410 decoder
3 *
4 * Copyright (c) 2011 Derek Buitenhuis
5 *
6 * This file is part of Libav.
7 *
8 * Libav 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 * Libav 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 Libav; 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/intreadwrite.h"
24#include "avcodec.h"
25
26static av_cold int v410_decode_init(AVCodecContext *avctx)
27{
28    avctx->pix_fmt             = PIX_FMT_YUV444P10;
29    avctx->bits_per_raw_sample = 10;
30
31    if (avctx->width & 1) {
32        av_log(avctx, AV_LOG_ERROR, "v410 requires even width.\n");
33        return AVERROR_INVALIDDATA;
34    }
35
36    avctx->coded_frame = avcodec_alloc_frame();
37
38    if (!avctx->coded_frame) {
39        av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
40        return AVERROR(ENOMEM);
41    }
42
43    return 0;
44}
45
46static int v410_decode_frame(AVCodecContext *avctx, void *data,
47                             int *data_size, AVPacket *avpkt)
48{
49    AVFrame *pic = avctx->coded_frame;
50    uint8_t *src = avpkt->data;
51    uint16_t *y, *u, *v;
52    uint32_t val;
53    int i, j;
54
55    if (pic->data[0])
56        avctx->release_buffer(avctx, pic);
57
58    if (avpkt->size < 4 * avctx->height * avctx->width) {
59        av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
60        return AVERROR(EINVAL);
61    }
62
63    pic->reference = 0;
64
65    if (avctx->get_buffer(avctx, pic) < 0) {
66        av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
67        return AVERROR(ENOMEM);
68    }
69
70    pic->key_frame = 1;
71    pic->pict_type = AV_PICTURE_TYPE_I;
72
73    y = (uint16_t *)pic->data[0];
74    u = (uint16_t *)pic->data[1];
75    v = (uint16_t *)pic->data[2];
76
77    for (i = 0; i < avctx->height; i++) {
78        for (j = 0; j < avctx->width; j++) {
79            val = AV_RL32(src);
80
81            u[j] = (val >>  2) & 0x3FF;
82            y[j] = (val >> 12) & 0x3FF;
83            v[j] = (val >> 22);
84
85            src += 4;
86        }
87
88        y += pic->linesize[0] >> 1;
89        u += pic->linesize[1] >> 1;
90        v += pic->linesize[2] >> 1;
91    }
92
93    *data_size = sizeof(AVFrame);
94    *(AVFrame *)data = *pic;
95
96    return avpkt->size;
97}
98
99static av_cold int v410_decode_close(AVCodecContext *avctx)
100{
101    if (avctx->coded_frame->data[0])
102        avctx->release_buffer(avctx, avctx->coded_frame);
103
104    av_freep(&avctx->coded_frame);
105
106    return 0;
107}
108
109AVCodec ff_v410_decoder = {
110    .name         = "v410",
111    .type         = AVMEDIA_TYPE_VIDEO,
112    .id           = CODEC_ID_V410,
113    .init         = v410_decode_init,
114    .decode       = v410_decode_frame,
115    .close        = v410_decode_close,
116    .capabilities = CODEC_CAP_DR1,
117    .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
118};
119