libavcodec/rawenc.c

   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 libavcodec/rawenc.c
  24  * Raw Video Encoder
  25  */
  26
  27 #include "avcodec.h"
  28 #include "raw.h"
  29 #include "libavutil/intreadwrite.h"
  30
  31 static av_cold int raw_init_encoder(AVCodecContext *avctx)
  32 {
  33     avctx->coded_frame = (AVFrame *)avctx->priv_data;
  34     avctx->coded_frame->pict_type = FF_I_TYPE;
  35     avctx->coded_frame->key_frame = 1;
  36     if(!avctx->codec_tag)
  37         avctx->codec_tag = avcodec_pix_fmt_to_codec_tag(avctx->pix_fmt);
  38     return 0;
  39 }
  40
  41 static int raw_encode(AVCodecContext *avctx,
  42                             unsigned char *frame, int buf_size, void *data)
  43 {
  44     int ret = avpicture_layout((AVPicture *)data, avctx->pix_fmt, avctx->width,
  45                                                avctx->height, frame, buf_size);
  46
  47     if(avctx->codec_tag == AV_RL32("yuv2") && ret > 0 &&
  48        avctx->pix_fmt   == PIX_FMT_YUYV422) {
  49         int x;
  50         for(x = 1; x < avctx->height*avctx->width*2; x += 2)
  51             frame[x] ^= 0x80;
  52     }
  53     return ret;
  54 }
  55
  56 AVCodec rawvideo_encoder = {
  57     "rawvideo",
  58     CODEC_TYPE_VIDEO,
  59     CODEC_ID_RAWVIDEO,
  60     sizeof(AVFrame),
  61     raw_init_encoder,
  62     raw_encode,
  63     .long_name = NULL_IF_CONFIG_SMALL("raw video"),
  64 };