text: /*
   * v410 decoder
   *
   * Copyright (c) 2011 Derek Buitenhuis
   *
   * 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 "libavutil/common.h"
  #include "libavutil/intreadwrite.h"
  #include "avcodec.h"
  #include "internal.h"
  
  static av_cold int v410_decode_init(AVCodecContext *avctx)
  {
      avctx->pix_fmt             = AV_PIX_FMT_YUV444P10;
      avctx->bits_per_raw_sample = 10;
  
      if (avctx->width & 1) {
          if (avctx->err_recognition & AV_EF_EXPLODE) {
              av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");
              return AVERROR_INVALIDDATA;
          } else {
              av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n");
          }
      }
  
      return 0;
  }
  
  static int v410_decode_frame(AVCodecContext *avctx, void *data,
                               int *got_frame, AVPacket *avpkt)
  {
      AVFrame *pic = data;
      uint8_t *src = avpkt->data;
      uint16_t *y, *u, *v;
      uint32_t val;
      int i, j, ret;
  
      if (avpkt->size < 4 * avctx->height * avctx->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; j++) {
              val = AV_RL32(src);
  
              u[j] = (val >>  2) & 0x3FF;
              y[j] = (val >> 12) & 0x3FF;
              v[j] = (val >> 22);
  
              src += 4;
          }
  
          y += pic->linesize[0] >> 1;
          u += pic->linesize[1] >> 1;
          v += pic->linesize[2] >> 1;
      }
  
      *got_frame = 1;
  
      return avpkt->size;
  }
  
  AVCodec ff_v410_decoder = {
      .name         = "v410",
      .type         = AVMEDIA_TYPE_VIDEO,
      .id           = AV_CODEC_ID_V410,
      .init         = v410_decode_init,
      .decode       = v410_decode_frame,
      .capabilities = CODEC_CAP_DR1,
      .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
  };
  