src/unix/wave.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wave.cpp
   3 // Purpose:     wxWave
   4 // Author:      Marcel Rasche
   5 // Modified by:
   6 // Created:     25/10/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "wave.h"
  14 #endif
  15
  16 #include "wx/setup.h"
  17
  18 #if wxUSE_WAVE
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #if defined(__BORLANDC__)
  24 #pragma hdrstop
  25 #endif
  26
  27 #include <stdio.h>
  28 #include <unistd.h>
  29 #include <fcntl.h>
  30 #include <sys/ioctl.h>
  31 #include <linux/soundcard.h>
  32
  33 #ifndef WX_PRECOMP
  34 #include "wx/wx.h"
  35 #endif
  36
  37 #include "wx/file.h"
  38 #include "wx/wave.h"
  39
  40 //-----------------------------------------------------------------
  41 // wxWave
  42 //-----------------------------------------------------------------
  43
  44 wxWave::wxWave()
  45   : m_waveData(NULL), m_waveLength(0), m_isResource(FALSE)
  46 {
  47 }
  48
  49 wxWave::wxWave(const wxString& sFileName, bool isResource)
  50   : m_waveData(NULL), m_waveLength(0), m_isResource(isResource)
  51 {
  52     Create(sFileName, isResource);
  53 }
  54
  55 wxWave::wxWave(int size, const wxByte* data)
  56   : m_waveData(NULL), m_waveLength(0), m_isResource(FALSE)
  57 {
  58     Create(size, data);
  59 }
  60
  61 wxWave::~wxWave()
  62 {
  63     Free();
  64 }
  65
  66 bool wxWave::Create(const wxString& fileName, bool isResource)
  67 {
  68     Free();
  69
  70     if (isResource)
  71     {
  72         //  todo
  73         return (m_waveData ? TRUE : FALSE);
  74     }
  75     else
  76     {
  77         m_isResource = FALSE;
  78
  79         wxFile fileWave;
  80         if (!fileWave.Open(fileName, wxFile::read))
  81         {
  82             return FALSE;
  83         }
  84
  85         m_waveLength = (int) fileWave.Length();
  86
  87         m_waveData = new wxByte[m_waveLength];
  88         if (!m_waveData)
  89         {
  90             return FALSE;
  91         }
  92
  93         fileWave.Read(m_waveData, m_waveLength);
  94
  95         return TRUE;
  96     }
  97 }
  98
  99 bool wxWave::Create(int size, const wxByte* data)
 100 {
 101     Free();
 102     m_isResource = FALSE;
 103     m_waveLength=size;
 104     m_waveData = new wxByte[size];
 105     if (!m_waveData)
 106     {
 107         return FALSE;
 108     }
 109
 110     for (int i=0; i<size; i++) m_waveData[i] = data[i];
 111
 112     return TRUE;
 113 }
 114
 115 bool wxWave::Play(bool async, bool looped)
 116 {
 117     if (!IsOk()) return FALSE;
 118
 119     int dev = OpenDSP();
 120
 121     if (dev<0) return FALSE;
 122
 123     ioctl(dev,SNDCTL_DSP_SYNC,0);
 124
 125     bool play=TRUE;
 126     int i,l=0;
 127     do
 128     {
 129         i= (int)((l+m_DSPblkSize) < m_sizeData ? m_DSPblkSize : (m_sizeData-l));
 130         if ( write(dev,&m_data[l],i) != i )
 131         {
 132             play=FALSE;
 133         }
 134         l +=i;
 135     } while (play == TRUE && l<m_sizeData);
 136
 137     close(dev);
 138     return TRUE;
 139 }
 140
 141 bool wxWave::Free()
 142 {
 143     if (m_waveData)
 144     {
 145         delete[] m_waveData;
 146         m_waveData = NULL;
 147         m_waveLength = 0;
 148         return TRUE;
 149     }
 150
 151     return FALSE;
 152 }
 153
 154 typedef  struct
 155 {
 156   unsigned long   uiSize;
 157   unsigned short  uiFormatTag;
 158   unsigned short  uiChannels;
 159   unsigned long   ulSamplesPerSec;
 160   unsigned long   ulAvgBytesPerSec;
 161   unsigned short  uiBlockAlign;
 162   unsigned short  uiBitsPerSample;
 163 } WAVEFORMAT;
 164
 165 #define MONO 1  // and stereo is 2 by wav format
 166 #define WAVE_FORMAT_PCM 1
 167 #define WAVE_INDEX  8
 168 #define FMT_INDEX   12
 169
 170 int wxWave::OpenDSP(void)
 171 {
 172   WAVEFORMAT  waveformat;
 173   int dev=-1;
 174   unsigned long ul;
 175
 176   if (m_waveLength < (int)(32+sizeof(WAVEFORMAT)))
 177     return -1;
 178
 179   memcpy(&waveformat,&m_waveData[FMT_INDEX+4],sizeof(WAVEFORMAT));
 180
 181   if (memcmp(m_waveData, "RIFF", 4) != 0)
 182     return -1;
 183   if (memcmp(&m_waveData[WAVE_INDEX], "WAVE", 4) != 0)
 184     return -1;
 185   if (memcmp(&m_waveData[FMT_INDEX], "fmt ", 4) != 0)
 186     return -1;
 187   if (memcmp(&m_waveData[FMT_INDEX+waveformat.uiSize+8], "data", 4) != 0)
 188     return -1;
 189   memcpy(&ul,&m_waveData[FMT_INDEX+waveformat.uiSize+12],4);
 190   m_sizeData=ul;
 191   if ((int)(m_sizeData+FMT_INDEX+waveformat.uiSize+16) != m_waveLength)
 192     return -1;
 193   m_data=(char *)(&m_waveData[FMT_INDEX+waveformat.uiSize+8]);
 194
 195   if (waveformat.uiFormatTag != WAVE_FORMAT_PCM)
 196     return -1;
 197   if (waveformat.ulSamplesPerSec != waveformat.ulAvgBytesPerSec/waveformat.uiBlockAlign)
 198     return -1;
 199
 200   if ((dev = open(AUDIODEV,O_RDWR,0)) <0)
 201     return -1;
 202
 203   if (!InitDSP(dev,(int)waveformat.uiBitsPerSample,waveformat.uiChannels == MONO ? 0:1,waveformat.ulSamplesPerSec))
 204     {
 205       close(dev);
 206       return -1;
 207     }
 208
 209   return dev;
 210 }
 211
 212 bool wxWave::InitDSP(int dev, int iDataBits, int iChannel,unsigned long ulSamplingRate)
 213 {
 214   if ( ioctl(dev,SNDCTL_DSP_GETBLKSIZE,&m_DSPblkSize) < 0 )
 215     return FALSE;
 216   if (m_DSPblkSize < 4096 || m_DSPblkSize > 65536)
 217     return FALSE;
 218   if ( ioctl(dev,SNDCTL_DSP_SAMPLESIZE,&iDataBits) < 0 )
 219     return FALSE;
 220   if ( ioctl(dev,SNDCTL_DSP_STEREO,&iChannel) < 0 )
 221     return FALSE;
 222   if ( ioctl(dev,SNDCTL_DSP_SPEED,&ulSamplingRate) < 0 )
 223     return FALSE;
 224
 225   return TRUE;
 226 }
 227 #endif
 228