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  1. /*
  2.  * v308 decoder
  3.  * Copyright (c) 2011 Carl Eugen Hoyos
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #include "avcodec.h"
  23. #include "internal.h"
  24.  
  25. static av_cold int v308_decode_init(AVCodecContext *avctx)
  26. {
  27.     avctx->pix_fmt = AV_PIX_FMT_YUV444P;
  28.  
  29.     if (avctx->width & 1)
  30.         av_log(avctx, AV_LOG_WARNING, "v308 requires width to be even.\n");
  31.  
  32.     return 0;
  33. }
  34.  
  35. static int v308_decode_frame(AVCodecContext *avctx, void *data,
  36.                              int *got_frame, AVPacket *avpkt)
  37. {
  38.     AVFrame *pic = data;
  39.     const uint8_t *src = avpkt->data;
  40.     uint8_t *y, *u, *v;
  41.     int i, j, ret;
  42.  
  43.     if (avpkt->size < 3 * avctx->height * avctx->width) {
  44.         av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
  45.         return AVERROR(EINVAL);
  46.     }
  47.  
  48.     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
  49.         return ret;
  50.  
  51.     pic->key_frame = 1;
  52.     pic->pict_type = AV_PICTURE_TYPE_I;
  53.  
  54.     y = pic->data[0];
  55.     u = pic->data[1];
  56.     v = pic->data[2];
  57.  
  58.     for (i = 0; i < avctx->height; i++) {
  59.         for (j = 0; j < avctx->width; j++) {
  60.             v[j] = *src++;
  61.             y[j] = *src++;
  62.             u[j] = *src++;
  63.         }
  64.  
  65.         y += pic->linesize[0];
  66.         u += pic->linesize[1];
  67.         v += pic->linesize[2];
  68.     }
  69.  
  70.     *got_frame = 1;
  71.  
  72.     return avpkt->size;
  73. }
  74.  
  75. AVCodec ff_v308_decoder = {
  76.     .name         = "v308",
  77.     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:4:4"),
  78.     .type         = AVMEDIA_TYPE_VIDEO,
  79.     .id           = AV_CODEC_ID_V308,
  80.     .init         = v308_decode_init,
  81.     .decode       = v308_decode_frame,
  82.     .capabilities = CODEC_CAP_DR1,
  83. };
  84.