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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.  
  34. static av_cold int raw_init_encoder(AVCodecContext *avctx)
  35. {
  36.     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
  37.  
  38.     avctx->coded_frame            = avctx->priv_data;
  39.     avcodec_get_frame_defaults(avctx->coded_frame);
  40.     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
  41.     avctx->bits_per_coded_sample = av_get_bits_per_pixel(desc);
  42.     if(!avctx->codec_tag)
  43.         avctx->codec_tag = avcodec_pix_fmt_to_codec_tag(avctx->pix_fmt);
  44.     return 0;
  45. }
  46.  
  47. static int raw_encode(AVCodecContext *avctx, AVPacket *pkt,
  48.                       const AVFrame *frame, int *got_packet)
  49. {
  50.     int ret = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
  51.  
  52.     if (ret < 0)
  53.         return ret;
  54.  
  55.     if ((ret = ff_alloc_packet2(avctx, pkt, ret)) < 0)
  56.         return ret;
  57.     if ((ret = avpicture_layout((const AVPicture *)frame, avctx->pix_fmt, avctx->width,
  58.                                 avctx->height, pkt->data, pkt->size)) < 0)
  59.         return ret;
  60.  
  61.     if(avctx->codec_tag == AV_RL32("yuv2") && ret > 0 &&
  62.        avctx->pix_fmt   == AV_PIX_FMT_YUYV422) {
  63.         int x;
  64.         for(x = 1; x < avctx->height*avctx->width*2; x += 2)
  65.             pkt->data[x] ^= 0x80;
  66.     }
  67.     pkt->flags |= AV_PKT_FLAG_KEY;
  68.     *got_packet = 1;
  69.     return 0;
  70. }
  71.  
  72. AVCodec ff_rawvideo_encoder = {
  73.     .name           = "rawvideo",
  74.     .long_name      = NULL_IF_CONFIG_SMALL("raw video"),
  75.     .type           = AVMEDIA_TYPE_VIDEO,
  76.     .id             = AV_CODEC_ID_RAWVIDEO,
  77.     .priv_data_size = sizeof(AVFrame),
  78.     .init           = raw_init_encoder,
  79.     .encode2        = raw_encode,
  80. };
  81.