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  1. /*
  2.  * v410 decoder
  3.  *
  4.  * Copyright (c) 2011 Derek Buitenhuis
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. #include "libavutil/common.h"
  24. #include "libavutil/intreadwrite.h"
  25. #include "avcodec.h"
  26. #include "internal.h"
  27.  
  28. static av_cold int v410_decode_init(AVCodecContext *avctx)
  29. {
  30.     avctx->pix_fmt             = AV_PIX_FMT_YUV444P10;
  31.     avctx->bits_per_raw_sample = 10;
  32.  
  33.     if (avctx->width & 1) {
  34.         if (avctx->err_recognition & AV_EF_EXPLODE) {
  35.             av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");
  36.             return AVERROR_INVALIDDATA;
  37.         } else {
  38.             av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n");
  39.         }
  40.     }
  41.  
  42.     return 0;
  43. }
  44.  
  45. static int v410_decode_frame(AVCodecContext *avctx, void *data,
  46.                              int *got_frame, AVPacket *avpkt)
  47. {
  48.     AVFrame *pic = data;
  49.     uint8_t *src = avpkt->data;
  50.     uint16_t *y, *u, *v;
  51.     uint32_t val;
  52.     int i, j, ret;
  53.  
  54.     if (avpkt->size < 4 * avctx->height * avctx->width) {
  55.         av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
  56.         return AVERROR(EINVAL);
  57.     }
  58.  
  59.     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
  60.         return ret;
  61.  
  62.     pic->key_frame = 1;
  63.     pic->pict_type = AV_PICTURE_TYPE_I;
  64.  
  65.     y = (uint16_t *)pic->data[0];
  66.     u = (uint16_t *)pic->data[1];
  67.     v = (uint16_t *)pic->data[2];
  68.  
  69.     for (i = 0; i < avctx->height; i++) {
  70.         for (j = 0; j < avctx->width; j++) {
  71.             val = AV_RL32(src);
  72.  
  73.             u[j] = (val >>  2) & 0x3FF;
  74.             y[j] = (val >> 12) & 0x3FF;
  75.             v[j] = (val >> 22);
  76.  
  77.             src += 4;
  78.         }
  79.  
  80.         y += pic->linesize[0] >> 1;
  81.         u += pic->linesize[1] >> 1;
  82.         v += pic->linesize[2] >> 1;
  83.     }
  84.  
  85.     *got_frame = 1;
  86.  
  87.     return avpkt->size;
  88. }
  89.  
  90. AVCodec ff_v410_decoder = {
  91.     .name         = "v410",
  92.     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
  93.     .type         = AVMEDIA_TYPE_VIDEO,
  94.     .id           = AV_CODEC_ID_V410,
  95.     .init         = v410_decode_init,
  96.     .decode       = v410_decode_frame,
  97.     .capabilities = CODEC_CAP_DR1,
  98. };
  99.