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 "avcodec.h"
  #include "get_bits.h"
  
  static av_cold int v410_decode_init(AVCodecContext *avctx)
  {
      avctx->pix_fmt             = PIX_FMT_YUV444P10;
      avctx->bits_per_raw_sample = 10;
  
      if (avctx->width & 1) {
          av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");
          return AVERROR_INVALIDDATA;
      }
  
      avctx->coded_frame = avcodec_alloc_frame();
  
      if (!avctx->coded_frame) {
          av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
          return AVERROR(ENOMEM);
      }
  
      return 0;
  }
  
  static int v410_decode_frame(AVCodecContext *avctx, void *data,
                               int *data_size, AVPacket *avpkt)
  {
      AVFrame *pic = avctx->coded_frame;
      uint8_t *src = avpkt->data;
      uint16_t *y, *u, *v;
      uint32_t val;
      int i, j;
  
      if (pic->data[0])
          avctx->release_buffer(avctx, pic);
  
      if (avpkt->size < 4*avctx->height*avctx->width) {
          av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
          return AVERROR(EINVAL);
      }
  
      pic->reference = 0;
  
      if (avctx->get_buffer(avctx, pic) < 0) {
          av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
          return AVERROR(ENOMEM);
      }
  
      pic->key_frame = 1;
      pic->pict_type = FF_I_TYPE;
  
      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;
      }
  
      *data_size = sizeof(AVFrame);
      *(AVFrame *)data = *pic;
  
      return avpkt->size;
  }
  
  static av_cold int v410_decode_close(AVCodecContext *avctx)
  {
      if (avctx->coded_frame->data[0])
          avctx->release_buffer(avctx, avctx->coded_frame);
  
      av_freep(&avctx->coded_frame);
  
      return 0;
  }
  
  AVCodec ff_v410_decoder = {
      .name         = "v410",
      .type         = AVMEDIA_TYPE_VIDEO,
      .id           = CODEC_ID_V410,
      .init         = v410_decode_init,
      .decode       = v410_decode_frame,
      .close        = v410_decode_close,
      .capabilities = CODEC_CAP_DR1,
      .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
  };
  