Libav
r210dec.c
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1 /*
2  * R210 decoder
3  *
4  * Copyright (c) 2009 Reimar Doeffinger <Reimar.Doeffinger@gmx.de>
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 "avcodec.h"
24 #include "internal.h"
25 #include "libavutil/bswap.h"
26 #include "libavutil/common.h"
27 
29 {
30  avctx->pix_fmt = AV_PIX_FMT_RGB48;
31  avctx->bits_per_raw_sample = 10;
32 
33  return 0;
34 }
35 
36 static 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, 64);
43  uint8_t *dst_line;
44 
45  if (avpkt->size < 4 * aligned_width * avctx->height) {
46  av_log(avctx, AV_LOG_ERROR, "packet too small\n");
47  return AVERROR_INVALIDDATA;
48  }
49 
50  if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
51  return ret;
52 
54  pic->key_frame = 1;
55  dst_line = pic->data[0];
56 
57  for (h = 0; h < avctx->height; h++) {
58  uint16_t *dst = (uint16_t *)dst_line;
59  for (w = 0; w < avctx->width; w++) {
60  uint32_t pixel = av_be2ne32(*src++);
61  uint16_t r, g, b;
62  if (avctx->codec_id==AV_CODEC_ID_R210) {
63  b = pixel << 6;
64  g = (pixel >> 4) & 0xffc0;
65  r = (pixel >> 14) & 0xffc0;
66  } else {
67  b = pixel << 4;
68  g = (pixel >> 6) & 0xffc0;
69  r = (pixel >> 16) & 0xffc0;
70  }
71  *dst++ = r | (r >> 10);
72  *dst++ = g | (g >> 10);
73  *dst++ = b | (b >> 10);
74  }
75  src += aligned_width - avctx->width;
76  dst_line += pic->linesize[0];
77  }
78 
79  *got_frame = 1;
80 
81  return avpkt->size;
82 }
83 
84 #if CONFIG_R210_DECODER
85 AVCodec ff_r210_decoder = {
86  .name = "r210",
87  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),
88  .type = AVMEDIA_TYPE_VIDEO,
89  .id = AV_CODEC_ID_R210,
90  .init = decode_init,
91  .decode = decode_frame,
92  .capabilities = CODEC_CAP_DR1,
93 };
94 #endif
95 #if CONFIG_R10K_DECODER
96 AVCodec ff_r10k_decoder = {
97  .name = "r10k",
98  .long_name = NULL_IF_CONFIG_SMALL("AJA Kona 10-bit RGB Codec"),
99  .type = AVMEDIA_TYPE_VIDEO,
100  .id = AV_CODEC_ID_R10K,
101  .init = decode_init,
102  .decode = decode_frame,
103  .capabilities = CODEC_CAP_DR1,
104 };
105 #endif