LCOV - code coverage report
Current view: top level - libavcodec - yuv4dec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 26 29 89.7 %
Date: 2017-12-16 01:21:47 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * libquicktime yuv4 decoder
       3             :  *
       4             :  * Copyright (c) 2011 Carl Eugen Hoyos
       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 "avcodec.h"
      24             : #include "internal.h"
      25             : 
      26           8 : static av_cold int yuv4_decode_init(AVCodecContext *avctx)
      27             : {
      28           8 :     avctx->pix_fmt = AV_PIX_FMT_YUV420P;
      29             : 
      30           8 :     return 0;
      31             : }
      32             : 
      33         200 : static int yuv4_decode_frame(AVCodecContext *avctx, void *data,
      34             :                              int *got_frame, AVPacket *avpkt)
      35             : {
      36         200 :     AVFrame *pic = data;
      37         200 :     const uint8_t *src = avpkt->data;
      38             :     uint8_t *y, *u, *v;
      39             :     int i, j, ret;
      40             : 
      41         200 :     if (avpkt->size < 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1)) {
      42           0 :         av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
      43           0 :         return AVERROR(EINVAL);
      44             :     }
      45             : 
      46         200 :     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
      47           0 :         return ret;
      48             : 
      49         200 :     pic->key_frame = 1;
      50         200 :     pic->pict_type = AV_PICTURE_TYPE_I;
      51             : 
      52         200 :     y = pic->data[0];
      53         200 :     u = pic->data[1];
      54         200 :     v = pic->data[2];
      55             : 
      56       22650 :     for (i = 0; i < (avctx->height + 1) >> 1; i++) {
      57     3838500 :         for (j = 0; j < (avctx->width + 1) >> 1; j++) {
      58     3816050 :             u[j] = *src++ ^ 0x80;
      59     3816050 :             v[j] = *src++ ^ 0x80;
      60     3816050 :             y[                   2 * j    ] = *src++;
      61     3816050 :             y[                   2 * j + 1] = *src++;
      62     3816050 :             y[pic->linesize[0] + 2 * j    ] = *src++;
      63     3816050 :             y[pic->linesize[0] + 2 * j + 1] = *src++;
      64             :         }
      65             : 
      66       22450 :         y += 2 * pic->linesize[0];
      67       22450 :         u +=     pic->linesize[1];
      68       22450 :         v +=     pic->linesize[2];
      69             :     }
      70             : 
      71         200 :     *got_frame = 1;
      72             : 
      73         200 :     return avpkt->size;
      74             : }
      75             : 
      76             : AVCodec ff_yuv4_decoder = {
      77             :     .name         = "yuv4",
      78             :     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),
      79             :     .type         = AVMEDIA_TYPE_VIDEO,
      80             :     .id           = AV_CODEC_ID_YUV4,
      81             :     .init         = yuv4_decode_init,
      82             :     .decode       = yuv4_decode_frame,
      83             :     .capabilities = AV_CODEC_CAP_DR1,
      84             : };

Generated by: LCOV version 1.13