LCOV - code coverage report
Current view: top level - libavcodec - y41pdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 31 35 88.6 %
Date: 2017-12-16 13:57:32 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * y41p decoder
       3             :  *
       4             :  * Copyright (c) 2012 Paul B Mahol
       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           6 : static av_cold int y41p_decode_init(AVCodecContext *avctx)
      27             : {
      28           6 :     avctx->pix_fmt             = AV_PIX_FMT_YUV411P;
      29           6 :     avctx->bits_per_raw_sample = 12;
      30             : 
      31           6 :     if (avctx->width & 7) {
      32           0 :         av_log(avctx, AV_LOG_WARNING, "y41p requires width to be divisible by 8.\n");
      33             :     }
      34             : 
      35           6 :     return 0;
      36             : }
      37             : 
      38         150 : static int y41p_decode_frame(AVCodecContext *avctx, void *data,
      39             :                              int *got_frame, AVPacket *avpkt)
      40             : {
      41         150 :     AVFrame *pic = data;
      42         150 :     uint8_t *src = avpkt->data;
      43             :     uint8_t *y, *u, *v;
      44             :     int i, j, ret;
      45             : 
      46         150 :     if (avpkt->size < 3LL * avctx->height * FFALIGN(avctx->width, 8) / 2) {
      47           0 :         av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
      48           0 :         return AVERROR(EINVAL);
      49             :     }
      50             : 
      51         150 :     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
      52           0 :         return ret;
      53             : 
      54         150 :     pic->key_frame = 1;
      55         150 :     pic->pict_type = AV_PICTURE_TYPE_I;
      56             : 
      57       43350 :     for (i = avctx->height - 1; i >= 0 ; i--) {
      58       43200 :         y = &pic->data[0][i * pic->linesize[0]];
      59       43200 :         u = &pic->data[1][i * pic->linesize[1]];
      60       43200 :         v = &pic->data[2][i * pic->linesize[2]];
      61     1944000 :         for (j = 0; j < avctx->width; j += 8) {
      62     1900800 :             *(u++) = *src++;
      63     1900800 :             *(y++) = *src++;
      64     1900800 :             *(v++) = *src++;
      65     1900800 :             *(y++) = *src++;
      66             : 
      67     1900800 :             *(u++) = *src++;
      68     1900800 :             *(y++) = *src++;
      69     1900800 :             *(v++) = *src++;
      70     1900800 :             *(y++) = *src++;
      71             : 
      72     1900800 :             *(y++) = *src++;
      73     1900800 :             *(y++) = *src++;
      74     1900800 :             *(y++) = *src++;
      75     1900800 :             *(y++) = *src++;
      76             :         }
      77             :     }
      78             : 
      79         150 :     *got_frame = 1;
      80             : 
      81         150 :     return avpkt->size;
      82             : }
      83             : 
      84             : AVCodec ff_y41p_decoder = {
      85             :     .name         = "y41p",
      86             :     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
      87             :     .type         = AVMEDIA_TYPE_VIDEO,
      88             :     .id           = AV_CODEC_ID_Y41P,
      89             :     .init         = y41p_decode_init,
      90             :     .decode       = y41p_decode_frame,
      91             :     .capabilities = AV_CODEC_CAP_DR1,
      92             : };

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