/*
  * v308 decoder
  * Copyright (c) 2011 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"
 
 static av_cold int v308_decode_init(AVCodecContext *avctx)
 {
     avctx->pix_fmt = PIX_FMT_YUV444P;
 
     if (avctx->width & 1)
         av_log(avctx, AV_LOG_WARNING, "v308 requires width to be even.\n");
 
     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 v308_decode_frame(AVCodecContext *avctx, void *data,
                              int *data_size, AVPacket *avpkt)
 {
     AVFrame *pic = avctx->coded_frame;
     const uint8_t *src = avpkt->data;
     uint8_t *y, *u, *v;
     int i, j;
 
     if (pic->data[0])
         avctx->release_buffer(avctx, pic);
 
     if (avpkt->size < 3 * 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 = AV_PICTURE_TYPE_I;

 
     y = pic->data[0];
     u = pic->data[1];
     v = pic->data[2];
 
     for (i = 0; i < avctx->height; i++) {
         for (j = 0; j < avctx->width; j++) {
             v[j] = *src++;
             y[j] = *src++;
             u[j] = *src++;
         }
 
         y += pic->linesize[0];
         u += pic->linesize[1];
         v += pic->linesize[2];
     }
 
     *data_size = sizeof(AVFrame);
     *(AVFrame *)data = *pic;
 
     return avpkt->size;
 }
 
 static av_cold int v308_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_v308_decoder = {
     .name         = "v308",
     .type         = AVMEDIA_TYPE_VIDEO,
     .id           = CODEC_ID_V308,
     .init         = v308_decode_init,
     .decode       = v308_decode_frame,
     .close        = v308_decode_close,
     .capabilities = CODEC_CAP_DR1,
     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:4:4"),
 };