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