Libav
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/common.h"
24 #include "libavutil/intreadwrite.h"
25 #include "avcodec.h"
26 #include "internal.h"
27 
29 {
30  if (avctx->width & 1) {
31  av_log(avctx, AV_LOG_ERROR, "v410 requires even width.\n");
32  return AVERROR_INVALIDDATA;
33  }
34 
35  avctx->coded_frame = av_frame_alloc();
36 
37  if (!avctx->coded_frame) {
38  av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
39  return AVERROR(ENOMEM);
40  }
41 
42  return 0;
43 }
44 
45 static int v410_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
46  const AVFrame *pic, int *got_packet)
47 {
48  uint8_t *dst;
49  uint16_t *y, *u, *v;
50  uint32_t val;
51  int i, j, ret;
52 
53  if ((ret = ff_alloc_packet(pkt, avctx->width * avctx->height * 4)) < 0) {
54  av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
55  return ret;
56  }
57  dst = pkt->data;
58 
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  }
74  y += pic->linesize[0] >> 1;
75  u += pic->linesize[1] >> 1;
76  v += pic->linesize[2] >> 1;
77  }
78 
79  pkt->flags |= AV_PKT_FLAG_KEY;
80  *got_packet = 1;
81  return 0;
82 }
83 
85 {
86  av_freep(&avctx->coded_frame);
87 
88  return 0;
89 }
90 
92  .name = "v410",
93  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
94  .type = AVMEDIA_TYPE_VIDEO,
95  .id = AV_CODEC_ID_V410,
96  .init = v410_encode_init,
97  .encode2 = v410_encode_frame,
98  .close = v410_encode_close,
99  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE },
100 };