/*
  * R210 decoder
  *
  * Copyright (c) 2009 Reimar Doeffinger <Reimar.Doeffinger@gmx.de>
  *
  * 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 "libavutil/bswap.h"
 
 static av_cold int decode_init(AVCodecContext *avctx)
 {
     avctx->pix_fmt             = PIX_FMT_RGB48;
     avctx->bits_per_raw_sample = 10;
 
     avctx->coded_frame         = avcodec_alloc_frame();
 
     return 0;
 }
 
 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
                         AVPacket *avpkt)
 {
     int h, w;
     AVFrame *pic = avctx->coded_frame;
     const uint32_t *src = (const uint32_t *)avpkt->data;
     int aligned_width = FFALIGN(avctx->width, 64);
     uint8_t *dst_line;
 
     if (pic->data[0])
         avctx->release_buffer(avctx, pic);
 
     if (avpkt->size < 4 * aligned_width * avctx->height) {
         av_log(avctx, AV_LOG_ERROR, "packet too small\n");
         return -1;
     }
 
     pic->reference = 0;
     if (avctx->get_buffer(avctx, pic) < 0)
         return -1;
 

     pic->pict_type = AV_PICTURE_TYPE_I;

     pic->key_frame = 1;
     dst_line = pic->data[0];
 
     for (h = 0; h < avctx->height; h++) {
         uint16_t *dst = (uint16_t *)dst_line;
         for (w = 0; w < avctx->width; w++) {

             uint32_t pixel = av_be2ne32(*src++);

             uint16_t r, g, b;

             if (avctx->codec_id==CODEC_ID_R210) {

                 b =  pixel <<  6;
                 g = (pixel >>  4) & 0xffc0;
                 r = (pixel >> 14) & 0xffc0;

             } else {
                 b =  pixel <<  4;
                 g = (pixel >>  6) & 0xffc0;
                 r = (pixel >> 16) & 0xffc0;
             }

             *dst++ = r | (r >> 10);
             *dst++ = g | (g >> 10);
             *dst++ = b | (b >> 10);
         }
         src += aligned_width - avctx->width;
         dst_line += pic->linesize[0];
     }
 
     *data_size = sizeof(AVFrame);
     *(AVFrame*)data = *avctx->coded_frame;
 
     return avpkt->size;
 }
 
 static av_cold int decode_close(AVCodecContext *avctx)
 {
     AVFrame *pic = avctx->coded_frame;
     if (pic->data[0])
         avctx->release_buffer(avctx, pic);
     av_freep(&avctx->coded_frame);
 
     return 0;
 }
 

 #if CONFIG_R210_DECODER

 AVCodec ff_r210_decoder = {

     "r210",

     AVMEDIA_TYPE_VIDEO,

     CODEC_ID_R210,
     0,
     decode_init,
     NULL,
     decode_close,
     decode_frame,
     CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),
 };

 #endif
 #if CONFIG_R10K_DECODER

 AVCodec ff_r10k_decoder = {

     "r10k",
     AVMEDIA_TYPE_VIDEO,
     CODEC_ID_R10K,
     0,
     decode_init,
     NULL,
     decode_close,
     decode_frame,
     CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("AJA Kona 10-bit RGB Codec"),
 };
 #endif