LCOV - code coverage report
Current view: top level - src/libavformat - crcenc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 13 13 100.0 %
Date: 2017-04-23 07:57:23 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :  * CRC encoder (for codec/format testing)
       3             :  * Copyright (c) 2002 Fabrice Bellard
       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 <inttypes.h>
      23             : 
      24             : #include "libavutil/adler32.h"
      25             : #include "avformat.h"
      26             : 
      27             : typedef struct CRCState {
      28             :     uint32_t crcval;
      29             : } CRCState;
      30             : 
      31         144 : static int crc_write_header(struct AVFormatContext *s)
      32             : {
      33         144 :     CRCState *crc = s->priv_data;
      34             : 
      35             :     /* init CRC */
      36         144 :     crc->crcval = 1;
      37             : 
      38         144 :     return 0;
      39             : }
      40             : 
      41       11896 : static int crc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
      42             : {
      43       11896 :     CRCState *crc = s->priv_data;
      44       11896 :     crc->crcval = av_adler32_update(crc->crcval, pkt->data, pkt->size);
      45       11896 :     return 0;
      46             : }
      47             : 
      48         144 : static int crc_write_trailer(struct AVFormatContext *s)
      49             : {
      50         144 :     CRCState *crc = s->priv_data;
      51             :     char buf[64];
      52             : 
      53         144 :     snprintf(buf, sizeof(buf), "CRC=0x%08"PRIx32"\n", crc->crcval);
      54         144 :     avio_write(s->pb, buf, strlen(buf));
      55             : 
      56         144 :     return 0;
      57             : }
      58             : 
      59             : AVOutputFormat ff_crc_muxer = {
      60             :     .name              = "crc",
      61             :     .long_name         = NULL_IF_CONFIG_SMALL("CRC testing"),
      62             :     .priv_data_size    = sizeof(CRCState),
      63             :     .audio_codec       = AV_CODEC_ID_PCM_S16LE,
      64             :     .video_codec       = AV_CODEC_ID_RAWVIDEO,
      65             :     .write_header      = crc_write_header,
      66             :     .write_packet      = crc_write_packet,
      67             :     .write_trailer     = crc_write_trailer,
      68             :     .flags             = AVFMT_NOTIMESTAMPS,
      69             : };

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