/*
  * Pinnacle TARGA CineWave YUV16 decoder
  * Copyright (c) 2012 Carl Eugen Hoyos
  *
  * 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"

 
 static av_cold int y216_decode_init(AVCodecContext *avctx)
 {

     avctx->pix_fmt             = AV_PIX_FMT_YUV422P16;

     avctx->bits_per_raw_sample = 14;
 
     return 0;
 }
 
 static int y216_decode_frame(AVCodecContext *avctx, void *data,

                              int *got_frame, AVPacket *avpkt)

 {

     AVFrame *pic = data;

     const uint16_t *src = (uint16_t *)avpkt->data;

     uint16_t *y, *u, *v;
     int aligned_width = FFALIGN(avctx->width, 4);

     int i, j, ret;

 
     if (avpkt->size < 4 * avctx->height * aligned_width) {
         av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
         return AVERROR(EINVAL);
     }
 

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

 
     pic->key_frame = 1;
     pic->pict_type = AV_PICTURE_TYPE_I;
 
     y = (uint16_t *)pic->data[0];
     u = (uint16_t *)pic->data[1];
     v = (uint16_t *)pic->data[2];
 
     for (i = 0; i < avctx->height; i++) {
         for (j = 0; j < avctx->width >> 1; j++) {
             u[    j    ] = src[4 * j    ] << 2 | src[4 * j    ] >> 14;
             y[2 * j    ] = src[4 * j + 1] << 2 | src[4 * j + 1] >> 14;
             v[    j    ] = src[4 * j + 2] << 2 | src[4 * j + 2] >> 14;
             y[2 * j + 1] = src[4 * j + 3] << 2 | src[4 * j + 3] >> 14;
         }
 
         y += pic->linesize[0] >> 1;
         u += pic->linesize[1] >> 1;
         v += pic->linesize[2] >> 1;
         src += aligned_width << 1;
     }
 

     *got_frame = 1;

 
     return avpkt->size;
 }
 
 AVCodec ff_targa_y216_decoder = {
     .name         = "targa_y216",

     .long_name    = NULL_IF_CONFIG_SMALL("Pinnacle TARGA CineWave YUV16"),

     .type         = AVMEDIA_TYPE_VIDEO,
     .id           = AV_CODEC_ID_TARGA_Y216,
     .init         = y216_decode_init,
     .decode       = y216_decode_frame,

     .capabilities = AV_CODEC_CAP_DR1,

 };