/*
  * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "avcodec.h"

 #include "internal.h"

 #include "libavutil/bswap.h"

 #include "libavutil/internal.h"
 #include "libavutil/mem.h"

 
 static av_cold int decode_init(AVCodecContext *avctx)
 {

     if (avctx->width & 1) {

         av_log(avctx, AV_LOG_ERROR, "v210x needs even width\n");

         return AVERROR(EINVAL);

     }

     avctx->pix_fmt             = AV_PIX_FMT_YUV422P16;
     avctx->bits_per_raw_sample = 10;

 
     return 0;
 }
 

 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
                         AVPacket *avpkt)

 {

     const uint32_t *src = (const uint32_t *)avpkt->data;

     AVFrame *pic        = data;

     int width           = avctx->width;
     int y               = 0;

     uint16_t *ydst, *udst, *vdst, *yend;

     int ret;

     if (avpkt->size < avctx->width * avctx->height * 8 / 3) {

         av_log(avctx, AV_LOG_ERROR, "Packet too small\n");

         return AVERROR_INVALIDDATA;

     }
 

     if (avpkt->size > avctx->width * avctx->height * 8 / 3) {

         avpriv_request_sample(avctx, "(Probably) padded data");

     }
 

     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)

         return ret;

     ydst = (uint16_t *)pic->data[0];
     udst = (uint16_t *)pic->data[1];
     vdst = (uint16_t *)pic->data[2];
     yend = ydst + width;
     pic->pict_type = AV_PICTURE_TYPE_I;
     pic->key_frame = 1;
 
     for (;;) {
         uint32_t v = av_be2ne32(*src++);
         *udst++ = (v >> 16) & 0xFFC0;
         *ydst++ = (v >> 6 ) & 0xFFC0;
         *vdst++ = (v << 4 ) & 0xFFC0;
 
         v       = av_be2ne32(*src++);
         *ydst++ = (v >> 16) & 0xFFC0;
 
         if (ydst >= yend) {
             ydst += pic->linesize[0] / 2 - width;
             udst += pic->linesize[1] / 2 - width / 2;
             vdst += pic->linesize[2] / 2 - width / 2;
             yend = ydst + width;
             if (++y >= avctx->height)

                 break;
         }
 

         *udst++ = (v >> 6 ) & 0xFFC0;
         *ydst++ = (v << 4 ) & 0xFFC0;

         v = av_be2ne32(*src++);
         *vdst++ = (v >> 16) & 0xFFC0;
         *ydst++ = (v >> 6 ) & 0xFFC0;

         if (ydst >= yend) {
             ydst += pic->linesize[0] / 2 - width;
             udst += pic->linesize[1] / 2 - width / 2;
             vdst += pic->linesize[2] / 2 - width / 2;
             yend  = ydst + width;
             if (++y >= avctx->height)

                 break;
         }
 

         *udst++ = (v << 4 ) & 0xFFC0;
 
         v = av_be2ne32(*src++);
         *ydst++ = (v >> 16) & 0xFFC0;
         *vdst++ = (v >> 6 ) & 0xFFC0;
         *ydst++ = (v << 4 ) & 0xFFC0;
         if (ydst >= yend) {
             ydst += pic->linesize[0] / 2 - width;
             udst += pic->linesize[1] / 2 - width / 2;
             vdst += pic->linesize[2] / 2 - width / 2;
             yend  = ydst + width;
             if (++y >= avctx->height)

                 break;
         }
     }
 

     *got_frame = 1;

 
     return avpkt->size;
 }
 

 AVCodec ff_v210x_decoder = {

     .name           = "v210x",

     .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),

     .type           = AVMEDIA_TYPE_VIDEO,

     .id             = AV_CODEC_ID_V210X,

     .init           = decode_init,
     .decode         = decode_frame,
     .capabilities   = CODEC_CAP_DR1,

 };