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rawenc.c
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1 /*
2  * Raw Video Encoder
3  * Copyright (c) 2001 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Raw Video Encoder
25  */
26 
27 #include "avcodec.h"
28 #include "raw.h"
29 #include "internal.h"
30 #include "libavutil/pixdesc.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/internal.h"
33 
35 {
36  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
37 
38  avctx->coded_frame = av_frame_alloc();
39  if (!avctx->coded_frame)
40  return AVERROR(ENOMEM);
41 
44  if(!avctx->codec_tag)
46  return 0;
47 }
48 
49 static int raw_encode(AVCodecContext *avctx, AVPacket *pkt,
50  const AVFrame *frame, int *got_packet)
51 {
52  int ret = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
53 
54  if (ret < 0)
55  return ret;
56 
57  if ((ret = ff_alloc_packet2(avctx, pkt, ret)) < 0)
58  return ret;
59  if ((ret = avpicture_layout((const AVPicture *)frame, avctx->pix_fmt, avctx->width,
60  avctx->height, pkt->data, pkt->size)) < 0)
61  return ret;
62 
63  if(avctx->codec_tag == AV_RL32("yuv2") && ret > 0 &&
64  avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
65  int x;
66  for(x = 1; x < avctx->height*avctx->width*2; x += 2)
67  pkt->data[x] ^= 0x80;
68  }
69  pkt->flags |= AV_PKT_FLAG_KEY;
70  *got_packet = 1;
71  return 0;
72 }
73 
75 {
76  av_frame_free(&avctx->coded_frame);
77  return 0;
78 }
79 
81  .name = "rawvideo",
82  .long_name = NULL_IF_CONFIG_SMALL("raw video"),
83  .type = AVMEDIA_TYPE_VIDEO,
85  .init = raw_encode_init,
86  .close = raw_encode_close,
87  .encode2 = raw_encode,
88 };