libavcodec/v308dec.c

   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 "codec_internal.h"
  24 #include "decode.h"
  25
  26 static av_cold int v308_decode_init(AVCodecContext *avctx)
  27 {
  28     avctx->pix_fmt = AV_PIX_FMT_YUV444P;
  29
  30     if (avctx->width & 1)
  31         av_log(avctx, AV_LOG_WARNING, "v308 requires width to be even.\n");
  32
  33     av_log(avctx, AV_LOG_WARNING, "This decoder is deprecated and will be removed.\n");
  34
  35     return 0;
  36 }
  37
  38 static int v308_decode_frame(AVCodecContext *avctx, AVFrame *pic,
  39                              int *got_frame, AVPacket *avpkt)
  40 {
  41     const uint8_t *src = avpkt->data;
  42     uint8_t *y, *u, *v;
  43     int i, j, ret;
  44
  45     if (avpkt->size < 3 * avctx->height * avctx->width) {
  46         av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
  47         return AVERROR(EINVAL);
  48     }
  49
  50     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
  51         return ret;
  52
  53     y = pic->data[0];
  54     u = pic->data[1];
  55     v = pic->data[2];
  56
  57     for (i = 0; i < avctx->height; i++) {
  58         for (j = 0; j < avctx->width; j++) {
  59             v[j] = *src++;
  60             y[j] = *src++;
  61             u[j] = *src++;
  62         }
  63
  64         y += pic->linesize[0];
  65         u += pic->linesize[1];
  66         v += pic->linesize[2];
  67     }
  68
  69     *got_frame = 1;
  70
  71     return avpkt->size;
  72 }
  73
  74 const FFCodec ff_v308_decoder = {
  75     .p.name       = "v308",
  76     CODEC_LONG_NAME("Uncompressed packed 4:4:4"),
  77     .p.type       = AVMEDIA_TYPE_VIDEO,
  78     .p.id         = AV_CODEC_ID_V308,
  79     .init         = v308_decode_init,
  80     FF_CODEC_DECODE_CB(v308_decode_frame),
  81     .p.capabilities = AV_CODEC_CAP_DR1,
  82 };