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 "internal.h"
25#include "libavutil/bswap.h"
26#include "libavutil/common.h"
27
28static av_cold int decode_init(AVCodecContext *avctx)
29{
30    avctx->pix_fmt             = AV_PIX_FMT_RGB48;
31    avctx->bits_per_raw_sample = 10;
32
33    return 0;
34}
35
36static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
37                        AVPacket *avpkt)
38{
39    int h, w, ret;
40    AVFrame *pic = data;
41    const uint32_t *src = (const uint32_t *)avpkt->data;
42    int aligned_width = FFALIGN(avctx->width,
43                                avctx->codec_id == AV_CODEC_ID_R10K ? 1 : 64);
44    uint8_t *dst_line;
45
46    if (avpkt->size < 4 * aligned_width * avctx->height) {
47        av_log(avctx, AV_LOG_ERROR, "packet too small\n");
48        return AVERROR_INVALIDDATA;
49    }
50
51    if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
52        return ret;
53
54    pic->pict_type = AV_PICTURE_TYPE_I;
55    pic->key_frame = 1;
56    dst_line = pic->data[0];
57
58    for (h = 0; h < avctx->height; h++) {
59        uint16_t *dst = (uint16_t *)dst_line;
60        for (w = 0; w < avctx->width; w++) {
61            uint32_t pixel;
62            uint16_t r, g, b;
63            if (avctx->codec_id==AV_CODEC_ID_AVRP) {
64                pixel = av_le2ne32(*src++);
65            } else {
66                pixel = av_be2ne32(*src++);
67            }
68            if (avctx->codec_id==AV_CODEC_ID_R210) {
69                b =  pixel <<  6;
70                g = (pixel >>  4) & 0xffc0;
71                r = (pixel >> 14) & 0xffc0;
72            } else {
73                b =  pixel <<  4;
74                g = (pixel >>  6) & 0xffc0;
75                r = (pixel >> 16) & 0xffc0;
76            }
77            *dst++ = r | (r >> 10);
78            *dst++ = g | (g >> 10);
79            *dst++ = b | (b >> 10);
80        }
81        src += aligned_width - avctx->width;
82        dst_line += pic->linesize[0];
83    }
84
85    *got_frame      = 1;
86
87    return avpkt->size;
88}
89
90#if CONFIG_R210_DECODER
91AVCodec ff_r210_decoder = {
92    .name           = "r210",
93    .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),
94    .type           = AVMEDIA_TYPE_VIDEO,
95    .id             = AV_CODEC_ID_R210,
96    .init           = decode_init,
97    .decode         = decode_frame,
98    .capabilities   = CODEC_CAP_DR1,
99};
100#endif
101#if CONFIG_R10K_DECODER
102AVCodec ff_r10k_decoder = {
103    .name           = "r10k",
104    .long_name      = NULL_IF_CONFIG_SMALL("AJA Kona 10-bit RGB Codec"),
105    .type           = AVMEDIA_TYPE_VIDEO,
106    .id             = AV_CODEC_ID_R10K,
107    .init           = decode_init,
108    .decode         = decode_frame,
109    .capabilities   = CODEC_CAP_DR1,
110};
111#endif
112#if CONFIG_AVRP_DECODER
113AVCodec ff_avrp_decoder = {
114    .name           = "avrp",
115    .long_name      = NULL_IF_CONFIG_SMALL("Avid 1:1 10-bit RGB Packer"),
116    .type           = AVMEDIA_TYPE_VIDEO,
117    .id             = AV_CODEC_ID_AVRP,
118    .init           = decode_init,
119    .decode         = decode_frame,
120    .capabilities   = CODEC_CAP_DR1,
121};
122#endif
123