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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 
34  if (!avctx->coded_frame)
35  return AVERROR(ENOMEM);
36 
37  return 0;
38 }
39 
40 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
41  AVPacket *avpkt)
42 {
43  int h, w;
44  AVFrame *pic = avctx->coded_frame;
45  const uint32_t *src = (const uint32_t *)avpkt->data;
46  int aligned_width = FFALIGN(avctx->width,
47  avctx->codec_id == AV_CODEC_ID_R10K ? 1 : 64);
48  uint8_t *dst_line;
49 
50  if (pic->data[0])
51  avctx->release_buffer(avctx, pic);
52 
53  if (avpkt->size < 4 * aligned_width * avctx->height) {
54  av_log(avctx, AV_LOG_ERROR, "packet too small\n");
55  return -1;
56  }
57 
58  pic->reference = 0;
59  if (ff_get_buffer(avctx, pic) < 0)
60  return -1;
61 
63  pic->key_frame = 1;
64  dst_line = pic->data[0];
65 
66  for (h = 0; h < avctx->height; h++) {
67  uint16_t *dst = (uint16_t *)dst_line;
68  for (w = 0; w < avctx->width; w++) {
69  uint32_t pixel;
70  uint16_t r, g, b;
71  if (avctx->codec_id==AV_CODEC_ID_AVRP) {
72  pixel = av_le2ne32(*src++);
73  } else {
74  pixel = av_be2ne32(*src++);
75  }
76  if (avctx->codec_id==AV_CODEC_ID_R210) {
77  b = pixel << 6;
78  g = (pixel >> 4) & 0xffc0;
79  r = (pixel >> 14) & 0xffc0;
80  } else {
81  b = pixel << 4;
82  g = (pixel >> 6) & 0xffc0;
83  r = (pixel >> 16) & 0xffc0;
84  }
85  *dst++ = r | (r >> 10);
86  *dst++ = g | (g >> 10);
87  *dst++ = b | (b >> 10);
88  }
89  src += aligned_width - avctx->width;
90  dst_line += pic->linesize[0];
91  }
92 
93  *got_frame = 1;
94  *(AVFrame*)data = *avctx->coded_frame;
95 
96  return avpkt->size;
97 }
98 
100 {
101  AVFrame *pic = avctx->coded_frame;
102  if (pic->data[0])
103  avctx->release_buffer(avctx, pic);
104  av_freep(&avctx->coded_frame);
105 
106  return 0;
107 }
108 
109 #if CONFIG_R210_DECODER
110 AVCodec ff_r210_decoder = {
111  .name = "r210",
112  .type = AVMEDIA_TYPE_VIDEO,
113  .id = AV_CODEC_ID_R210,
114  .init = decode_init,
115  .close = decode_close,
116  .decode = decode_frame,
117  .capabilities = CODEC_CAP_DR1,
118  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),
119 };
120 #endif
121 #if CONFIG_R10K_DECODER
122 AVCodec ff_r10k_decoder = {
123  .name = "r10k",
124  .type = AVMEDIA_TYPE_VIDEO,
125  .id = AV_CODEC_ID_R10K,
126  .init = decode_init,
127  .close = decode_close,
128  .decode = decode_frame,
129  .capabilities = CODEC_CAP_DR1,
130  .long_name = NULL_IF_CONFIG_SMALL("AJA Kona 10-bit RGB Codec"),
131 };
132 #endif
133 #if CONFIG_AVRP_DECODER
134 AVCodec ff_avrp_decoder = {
135  .name = "avrp",
136  .type = AVMEDIA_TYPE_VIDEO,
137  .id = AV_CODEC_ID_AVRP,
138  .init = decode_init,
139  .close = decode_close,
140  .decode = decode_frame,
141  .capabilities = CODEC_CAP_DR1,
142  .long_name = NULL_IF_CONFIG_SMALL("Avid 1:1 10-bit RGB Packer"),
143 };
144 #endif