1/*
2 * R210 decoder
3 *
4 * Copyright (c) 2009 Reimar Doeffinger <Reimar.Doeffinger@gmx.de>
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 "avcodec.h"
24#include "libavutil/bswap.h"
25
26static av_cold int decode_init(AVCodecContext *avctx)
27{
28    avctx->pix_fmt             = PIX_FMT_RGB48;
29    avctx->bits_per_raw_sample = 10;
30
31    avctx->coded_frame         = avcodec_alloc_frame();
32
33    return 0;
34}
35
36static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
37                        AVPacket *avpkt)
38{
39    int h, w;
40    AVFrame *pic = avctx->coded_frame;
41    const uint32_t *src = (const uint32_t *)avpkt->data;
42    int aligned_width = FFALIGN(avctx->width, 64);
43    uint8_t *dst_line;
44
45    if (pic->data[0])
46        avctx->release_buffer(avctx, pic);
47
48    if (avpkt->size < 4 * aligned_width * avctx->height) {
49        av_log(avctx, AV_LOG_ERROR, "packet too small\n");
50        return -1;
51    }
52
53    pic->reference = 0;
54    if (avctx->get_buffer(avctx, pic) < 0)
55        return -1;
56
57    pic->pict_type = FF_I_TYPE;
58    pic->key_frame = 1;
59    dst_line = pic->data[0];
60
61    for (h = 0; h < avctx->height; h++) {
62        uint16_t *dst = (uint16_t *)dst_line;
63        for (w = 0; w < avctx->width; w++) {
64            uint32_t pixel = be2me_32(*src++);
65            uint16_t r, g, b;
66            b =  pixel <<  6;
67            g = (pixel >>  4) & 0xffc0;
68            r = (pixel >> 14) & 0xffc0;
69            *dst++ = r | (r >> 10);
70            *dst++ = g | (g >> 10);
71            *dst++ = b | (b >> 10);
72        }
73        src += aligned_width - avctx->width;
74        dst_line += pic->linesize[0];
75    }
76
77    *data_size = sizeof(AVFrame);
78    *(AVFrame*)data = *avctx->coded_frame;
79
80    return avpkt->size;
81}
82
83static av_cold int decode_close(AVCodecContext *avctx)
84{
85    AVFrame *pic = avctx->coded_frame;
86    if (pic->data[0])
87        avctx->release_buffer(avctx, pic);
88    av_freep(&avctx->coded_frame);
89
90    return 0;
91}
92
93AVCodec r210_decoder = {
94    "r210",
95    AVMEDIA_TYPE_VIDEO,
96    CODEC_ID_R210,
97    0,
98    decode_init,
99    NULL,
100    decode_close,
101    decode_frame,
102    CODEC_CAP_DR1,
103    .long_name = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),
104};
105