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  1. /*
  2.  * v408 decoder
  3.  * Copyright (c) 2012 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 v408_decode_init(AVCodecContext *avctx)
  26. {
  27.     avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
  28.  
  29.     return 0;
  30. }
  31.  
  32. static int v408_decode_frame(AVCodecContext *avctx, void *data,
  33.                              int *got_frame, AVPacket *avpkt)
  34. {
  35.     AVFrame *pic = data;
  36.     const uint8_t *src = avpkt->data;
  37.     uint8_t *y, *u, *v, *a;
  38.     int i, j, ret;
  39.  
  40.     if (avpkt->size < 4 * avctx->height * avctx->width) {
  41.         av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
  42.         return AVERROR(EINVAL);
  43.     }
  44.  
  45.     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
  46.         return ret;
  47.  
  48.     pic->key_frame = 1;
  49.     pic->pict_type = AV_PICTURE_TYPE_I;
  50.  
  51.     y = pic->data[0];
  52.     u = pic->data[1];
  53.     v = pic->data[2];
  54.     a = pic->data[3];
  55.  
  56.     for (i = 0; i < avctx->height; i++) {
  57.         for (j = 0; j < avctx->width; j++) {
  58.             if (avctx->codec_id==AV_CODEC_ID_AYUV) {
  59.                 v[j] = *src++;
  60.                 u[j] = *src++;
  61.                 y[j] = *src++;
  62.                 a[j] = *src++;
  63.             } else {
  64.                 u[j] = *src++;
  65.                 y[j] = *src++;
  66.                 v[j] = *src++;
  67.                 a[j] = *src++;
  68.             }
  69.         }
  70.  
  71.         y += pic->linesize[0];
  72.         u += pic->linesize[1];
  73.         v += pic->linesize[2];
  74.         a += pic->linesize[3];
  75.     }
  76.  
  77.     *got_frame = 1;
  78.  
  79.     return avpkt->size;
  80. }
  81.  
  82. #if CONFIG_AYUV_DECODER
  83. AVCodec ff_ayuv_decoder = {
  84.     .name         = "ayuv",
  85.     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed MS 4:4:4:4"),
  86.     .type         = AVMEDIA_TYPE_VIDEO,
  87.     .id           = AV_CODEC_ID_AYUV,
  88.     .init         = v408_decode_init,
  89.     .decode       = v408_decode_frame,
  90.     .capabilities = CODEC_CAP_DR1,
  91. };
  92. #endif
  93. #if CONFIG_V408_DECODER
  94. AVCodec ff_v408_decoder = {
  95.     .name         = "v408",
  96.     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed QT 4:4:4:4"),
  97.     .type         = AVMEDIA_TYPE_VIDEO,
  98.     .id           = AV_CODEC_ID_V408,
  99.     .init         = v408_decode_init,
  100.     .decode       = v408_decode_frame,
  101.     .capabilities = CODEC_CAP_DR1,
  102. };
  103. #endif
  104.