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Viewing changes to avidemux/ADM_audiofilter/audioeng_null.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Daniel T Chen
  • Date: 2006-12-15 17:13:20 UTC
  • mfrom: (1.1.6 upstream)
  • Revision ID: james.westby@ubuntu.com-20061215171320-w79pvpehxx2fr217
Tags: 1:2.3.0-0.0ubuntu1
* Merge from debian-multimedia.org, remaining Ubuntu change:
  - desktop file,
  - no support for ccache and make -j.
* Closes Ubuntu: #69614.

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avidemux/ADM_audiofilter/audioeng_null.cpp
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/***************************************************************************
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                          audioeng_null.cpp  -  description
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                             -------------------
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        This audio plug in does nothing at all.
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        except that you are sure that the output is WAV PCM  with the given size
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    begin                : Sun Jan 13 2002
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    copyright            : (C) 2002 by mean
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    email                : fixounet@free.fr
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 ***************************************************************************/
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/***************************************************************************
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 *                                                                         *
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 *   This program is free software; you can redistribute it and/or modify  *
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 *   it under the terms of the GNU General Public License as published by  *
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 *   the Free Software Foundation; either version 2 of the License, or     *
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 *   (at your option) any later version.                                   *
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 *                                                                         *
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 ***************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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//#include <stream.h>
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#include <ADM_assert.h>
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#include <math.h>
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#include "config.h"
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#include "avifmt.h"
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#include "avifmt2.h"
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#include "avio.hxx"
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#include "fourcc.h"
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//#include "aviaudio.hxx"
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#include "audioprocess.hxx"
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//#include "toolkit.hxx"
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// Ctor: Duplicate
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//__________
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AVDMProcessAudio_Null::AVDMProcessAudio_Null
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(AVDMGenericAudioStream * instream, uint32_t time_offset, uint32_t duration):
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AVDMBufferedAudioStream    (instream)
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{
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double dur;
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    _wavheader = new WAVHeader;
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    memcpy(_wavheader, _instream->getInfo(), sizeof(WAVHeader));
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    _wavheader->encoding = WAV_PCM;
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    // bug spotted by jmisack
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      _wavheader->bitspersample=16;
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    // Case AC3 Downmixing to stereo ...
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    if( _wavheader->channels >2)
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                _wavheader->channels =2;
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    _wavheader->byterate =_wavheader->channels * _wavheader->frequency * 2;
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    strcpy(_name, "PROC:NULL");
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    _instream->goToTime(time_offset);
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    _start_time = time_offset;
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    dur=duration;
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    dur=dur*_wavheader->byterate*1.1;
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    dur=dur/1000;
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    _size = (uint32_t)dur;
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    _length = (uint32_t)dur;
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};
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AVDMProcessAudio_Null::~AVDMProcessAudio_Null()
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{
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    delete(_wavheader);
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};
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uint32_t        AVDMProcessAudio_Null::grab(uint8_t *obuffer)
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{
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uint32_t rdall=0;
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  rdall = _instream->readDecompress(1000, obuffer);
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  if (rdall == 0)
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              return MINUS_ONE; // we could not get a single byte ! End of stream
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  return rdall;
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}
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uint8_t  AVDMProcessAudio_Null::goToTime(uint32_t newoffset)
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{
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         _instream->goToTime(_start_time);
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         if(newoffset)
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         {
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                printf("AFNull: MMm Null not going to 0 ?\n");
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         }
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        return 1;
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}
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// EOF