summaryrefslogtreecommitdiffstats
path: root/libk3b/tools/k3bwavefilewriter.cpp
blob: 31ad6e0108eb6e3cd697cccc7ee6ffc430cca7fe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
/* 
 *
 * $Id: k3bwavefilewriter.cpp 619556 2007-01-03 17:38:12Z trueg $
 * Copyright (C) 2003 Sebastian Trueg <trueg@k3b.org>
 *
 * This file is part of the K3b project.
 * Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * See the file "COPYING" for the exact licensing terms.
 */


#include "k3bwavefilewriter.h"
#include <kdebug.h>

K3bWaveFileWriter::K3bWaveFileWriter()
  : m_outputStream( &m_outputFile )
{
}


K3bWaveFileWriter::~K3bWaveFileWriter()
{
  close();
}


bool K3bWaveFileWriter::open( const TQString& filename )
{
  close();

  m_outputFile.setName( filename );

  if( m_outputFile.open( IO_ReadWrite ) ) {
    m_filename = filename;

    writeEmptyHeader();

    return true;
  }
  else {
    return false;
  }
}


void K3bWaveFileWriter::close()
{
  if( isOpen() ) {
    if( m_outputFile.at() > 0 ) {
      padTo2352();

      // update wave header
      updateHeader();

      m_outputFile.close();
    }
    else {
      m_outputFile.close();
      m_outputFile.remove();
    }
  }

  m_filename = TQString();
}


bool K3bWaveFileWriter::isOpen()
{
  return m_outputFile.isOpen();
}


const TQString& K3bWaveFileWriter::filename() const 
{
  return m_filename;
}


void K3bWaveFileWriter::write( const char* data, int len, Endianess e )
{
  if( isOpen() ) {
    if( e == LittleEndian ) {
      m_outputStream.writeRawBytes( data, len );
    }
    else {
      if( len % 2 > 0 ) {
	kdDebug() << "(K3bWaveFileWriter) data length ("
		  << len << ") is not a multiple of 2! Cannot swap bytes." << endl;
	return;
      }

      // we need to swap the bytes
      char* buffer = new char[len];
      for( int i = 0; i < len-1; i+=2 ) {
	buffer[i] = data[i+1];
	buffer[i+1] = data[i];
      }
      m_outputStream.writeRawBytes( buffer, len );

      delete [] buffer;
    }
  }
}


void K3bWaveFileWriter::writeEmptyHeader()
{
  static const char riffHeader[] =
  {
    0x52, 0x49, 0x46, 0x46, // 0  "RIFF"
    0x00, 0x00, 0x00, 0x00, // 4  wavSize
    0x57, 0x41, 0x56, 0x45, // 8  "WAVE"
    0x66, 0x6d, 0x74, 0x20, // 12 "fmt "
    0x10, 0x00, 0x00, 0x00, // 16
    0x01, 0x00, 0x02, 0x00, // 20
    0x44, 0xac, 0x00, 0x00, // 24
    0x10, 0xb1, 0x02, 0x00, // 28
    0x04, 0x00, 0x10, 0x00, // 32
    0x64, 0x61, 0x74, 0x61, // 36 "data"
    0x00, 0x00, 0x00, 0x00  // 40 byteCount
  };

  m_outputStream.writeRawBytes( riffHeader, 44 );
}


void K3bWaveFileWriter::updateHeader()
{
  if( isOpen() ) {

    m_outputFile.flush();

    TQ_INT32 dataSize( m_outputFile.at() - 44 );
    TQ_INT32 wavSize(dataSize + 44 - 8);
    char c[4];

    // jump to the wavSize position in the header
    if( m_outputFile.at( 4 ) ) {
      c[0] = (wavSize   >> 0 ) & 0xff;
      c[1] = (wavSize   >> 8 ) & 0xff;
      c[2] = (wavSize   >> 16) & 0xff;
      c[3] = (wavSize   >> 24) & 0xff;
      m_outputStream.writeRawBytes( c, 4 );
    }
    else
      kdDebug() << "(K3bWaveFileWriter) unable to seek in file: " << m_outputFile.name() << endl;

    if( m_outputFile.at( 40 ) ) {
      c[0] = (dataSize   >> 0 ) & 0xff;
      c[1] = (dataSize   >> 8 ) & 0xff;
      c[2] = (dataSize   >> 16) & 0xff;
      c[3] = (dataSize   >> 24) & 0xff;
      m_outputStream.writeRawBytes( c, 4 );
    }
    else
      kdDebug() << "(K3bWaveFileWriter) unable to seek in file: " << m_outputFile.name() << endl;

    // jump back to the end
    m_outputFile.at( m_outputFile.size() );
  }
}


void K3bWaveFileWriter::padTo2352()
{ 
  int bytesToPad = ( m_outputFile.at() - 44 ) % 2352;
  if( bytesToPad > 0 ) {
    kdDebug() << "(K3bWaveFileWriter) padding wave file with " << bytesToPad << " bytes." << endl;

    char* c = new char[bytesToPad];
    memset( c, 0, bytesToPad );
    m_outputStream.writeRawBytes( c, bytesToPad );
    delete [] c;
  }
}


int K3bWaveFileWriter::fd() const
{
  return m_outputFile.handle();
}