/*
  * 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 "internal.h"

 #include "libavutil/bswap.h"

 #include "libavutil/common.h"

 
 static av_cold int decode_init(AVCodecContext *avctx)
 {

     if ((avctx->codec_tag & 0xFFFFFF) == MKTAG('r', '1', '0', 0)) {
         avctx->pix_fmt = AV_PIX_FMT_BGR48;
     } else {
         avctx->pix_fmt = AV_PIX_FMT_RGB48;
     }

     avctx->bits_per_raw_sample = 10;
 
     return 0;
 }
 

 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,

                         AVPacket *avpkt)
 {

     int h, w, ret;

     AVFrame *pic = data;

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

     int aligned_width = FFALIGN(avctx->width,

                                 avctx->codec_id == AV_CODEC_ID_R10K ? 1 : 64);

     uint8_t *dst_line;

     int r10 = (avctx->codec_tag & 0xFFFFFF) == MKTAG('r', '1', '0', 0);

     int le = avctx->codec_tag == MKTAG('R', '1', '0', 'k') &&
              avctx->extradata_size >= 12 && !memcmp(&avctx->extradata[4], "DpxE", 4) &&
              !avctx->extradata[11];

 
     if (avpkt->size < 4 * aligned_width * avctx->height) {
         av_log(avctx, AV_LOG_ERROR, "packet too small\n");

         return AVERROR_INVALIDDATA;

     }
 

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

         return ret;

     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;

             uint16_t r, g, b;

             if (avctx->codec_id == AV_CODEC_ID_AVRP || r10 || le) {

                 pixel = av_le2ne32(*src++);
             } else {
                 pixel = av_be2ne32(*src++);
             }

             if (avctx->codec_id == AV_CODEC_ID_R210 || r10) {

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

             } else {

                 b = (pixel <<  4) & 0xffc0;

                 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];
     }
 

     *got_frame      = 1;

 
     return avpkt->size;
 }
 

 #if CONFIG_R210_DECODER

 AVCodec ff_r210_decoder = {

     .name           = "r210",

     .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),

     .type           = AVMEDIA_TYPE_VIDEO,

     .id             = AV_CODEC_ID_R210,

     .init           = decode_init,
     .decode         = decode_frame,

     .capabilities   = AV_CODEC_CAP_DR1,

     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,

 };

 #endif
 #if CONFIG_R10K_DECODER

 AVCodec ff_r10k_decoder = {

     .name           = "r10k",

     .long_name      = NULL_IF_CONFIG_SMALL("AJA Kona 10-bit RGB Codec"),

     .type           = AVMEDIA_TYPE_VIDEO,

     .id             = AV_CODEC_ID_R10K,

     .init           = decode_init,
     .decode         = decode_frame,

     .capabilities   = AV_CODEC_CAP_DR1,

     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,

 };
 #endif

 #if CONFIG_AVRP_DECODER
 AVCodec ff_avrp_decoder = {
     .name           = "avrp",

     .long_name      = NULL_IF_CONFIG_SMALL("Avid 1:1 10-bit RGB Packer"),

     .type           = AVMEDIA_TYPE_VIDEO,

     .id             = AV_CODEC_ID_AVRP,

     .init           = decode_init,
     .decode         = decode_frame,

     .capabilities   = AV_CODEC_CAP_DR1,

     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,

 };
 #endif