rawenc.c
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1 /*
2  * Raw Video Encoder
3  * Copyright (c) 2001 Fabrice Bellard
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
27 #include "avcodec.h"
28 #include "raw.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/intreadwrite.h"
31 
33 {
34  avctx->coded_frame = (AVFrame *)avctx->priv_data;
36  avctx->coded_frame->key_frame = 1;
38  if(!avctx->codec_tag)
40  return 0;
41 }
42 
43 static int raw_encode(AVCodecContext *avctx,
44  unsigned char *frame, int buf_size, void *data)
45 {
46  int ret = avpicture_layout((AVPicture *)data, avctx->pix_fmt, avctx->width,
47  avctx->height, frame, buf_size);
48 
49  if(avctx->codec_tag == AV_RL32("yuv2") && ret > 0 &&
50  avctx->pix_fmt == PIX_FMT_YUYV422) {
51  int x;
52  for(x = 1; x < avctx->height*avctx->width*2; x += 2)
53  frame[x] ^= 0x80;
54  }
55  return ret;
56 }
57 
59  .name = "rawvideo",
60  .type = AVMEDIA_TYPE_VIDEO,
61  .id = CODEC_ID_RAWVIDEO,
62  .priv_data_size = sizeof(AVFrame),
64  .encode = raw_encode,
65  .long_name = NULL_IF_CONFIG_SMALL("raw video"),
66 };