v410dec.c
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1 /*
2  * v410 decoder
3  *
4  * Copyright (c) 2011 Derek Buitenhuis
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 "libavutil/intreadwrite.h"
24 #include "avcodec.h"
25 
27 {
28  avctx->pix_fmt = PIX_FMT_YUV444P10;
29  avctx->bits_per_raw_sample = 10;
30 
31  if (avctx->width & 1) {
32  av_log(avctx, AV_LOG_ERROR, "v410 requires even width.\n");
33  return AVERROR_INVALIDDATA;
34  }
35 
37 
38  if (!avctx->coded_frame) {
39  av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
40  return AVERROR(ENOMEM);
41  }
42 
43  return 0;
44 }
45 
46 static int v410_decode_frame(AVCodecContext *avctx, void *data,
47  int *data_size, AVPacket *avpkt)
48 {
49  AVFrame *pic = avctx->coded_frame;
50  uint8_t *src = avpkt->data;
51  uint16_t *y, *u, *v;
52  uint32_t val;
53  int i, j;
54 
55  if (pic->data[0])
56  avctx->release_buffer(avctx, pic);
57 
58  if (avpkt->size < 4 * avctx->height * avctx->width) {
59  av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
60  return AVERROR(EINVAL);
61  }
62 
63  pic->reference = 0;
64 
65  if (avctx->get_buffer(avctx, pic) < 0) {
66  av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
67  return AVERROR(ENOMEM);
68  }
69 
70  pic->key_frame = 1;
72 
73  y = (uint16_t *)pic->data[0];
74  u = (uint16_t *)pic->data[1];
75  v = (uint16_t *)pic->data[2];
76 
77  for (i = 0; i < avctx->height; i++) {
78  for (j = 0; j < avctx->width; j++) {
79  val = AV_RL32(src);
80 
81  u[j] = (val >> 2) & 0x3FF;
82  y[j] = (val >> 12) & 0x3FF;
83  v[j] = (val >> 22);
84 
85  src += 4;
86  }
87 
88  y += pic->linesize[0] >> 1;
89  u += pic->linesize[1] >> 1;
90  v += pic->linesize[2] >> 1;
91  }
92 
93  *data_size = sizeof(AVFrame);
94  *(AVFrame *)data = *pic;
95 
96  return avpkt->size;
97 }
98 
100 {
101  if (avctx->coded_frame->data[0])
102  avctx->release_buffer(avctx, avctx->coded_frame);
103 
104  av_freep(&avctx->coded_frame);
105 
106  return 0;
107 }
108 
110  .name = "v410",
111  .type = AVMEDIA_TYPE_VIDEO,
112  .id = CODEC_ID_V410,
113  .init = v410_decode_init,
114  .decode = v410_decode_frame,
115  .close = v410_decode_close,
116  .capabilities = CODEC_CAP_DR1,
117  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
118 };