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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 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 
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,
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 
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
91 AVCodec 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
102 AVCodec 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
113 AVCodec 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