v410enc.c
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1 /*
2  * v410 encoder
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  if (avctx->width & 1) {
29  av_log(avctx, AV_LOG_ERROR, "v410 requires even width.\n");
30  return AVERROR_INVALIDDATA;
31  }
32 
34 
35  if (!avctx->coded_frame) {
36  av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
37  return AVERROR(ENOMEM);
38  }
39 
40  return 0;
41 }
42 
43 static int v410_encode_frame(AVCodecContext *avctx, uint8_t *buf,
44  int buf_size, void *data)
45 {
46  AVFrame *pic = data;
47  uint8_t *dst = buf;
48  uint16_t *y, *u, *v;
49  uint32_t val;
50  int i, j;
51  int output_size = 0;
52 
53  if (buf_size < avctx->width * avctx->height * 4) {
54  av_log(avctx, AV_LOG_ERROR, "Out buffer is too small.\n");
55  return AVERROR(ENOMEM);
56  }
57 
58  avctx->coded_frame->reference = 0;
59  avctx->coded_frame->key_frame = 1;
61 
62  y = (uint16_t *)pic->data[0];
63  u = (uint16_t *)pic->data[1];
64  v = (uint16_t *)pic->data[2];
65 
66  for (i = 0; i < avctx->height; i++) {
67  for (j = 0; j < avctx->width; j++) {
68  val = u[j] << 2;
69  val |= y[j] << 12;
70  val |= (uint32_t) v[j] << 22;
71  AV_WL32(dst, val);
72  dst += 4;
73  output_size += 4;
74  }
75  y += pic->linesize[0] >> 1;
76  u += pic->linesize[1] >> 1;
77  v += pic->linesize[2] >> 1;
78  }
79 
80  return output_size;
81 }
82 
84 {
85  av_freep(&avctx->coded_frame);
86 
87  return 0;
88 }
89 
91  .name = "v410",
92  .type = AVMEDIA_TYPE_VIDEO,
93  .id = CODEC_ID_V410,
94  .init = v410_encode_init,
95  .encode = v410_encode_frame,
96  .close = v410_encode_close,
97  .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV444P10, PIX_FMT_NONE },
98  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
99 };