Fix the URL generated by Doxygen @sampledir macro.

[wxWidgets.git] / src / unix / sound.cpp

diff --git a/src/unix/sound.cpp b/src/unix/sound.cpp
index 63dd28625877cacd00d5577c943eb2cdce20f255..8543c66443b28243017bec3e436a274cbe69b36c 100644 (file)
--- a/src/unix/sound.cpp
+++ b/src/unix/sound.cpp
@@ -1,26 +1,19 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        sound.cpp
+// Name:        src/unix/sound.cpp

 // Purpose:     wxSound
 // Author:      Marcel Rasche, Vaclav Slavik
 // Modified by:
 // Created:     25/10/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Julian Smart, Open Source Applications Foundation
 // Purpose:     wxSound
 // Author:      Marcel Rasche, Vaclav Slavik
 // Modified by:
 // Created:     25/10/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Julian Smart, Open Source Applications Foundation

-// Licence:    wxWindows licence
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 /////////////////////////////////////////////////////////////////////////////
 

-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "sound.h"
-#pragma implementation "soundbase.h"
-#endif
-

 // for compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // for compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 

-#include "wx/setup.h"
-

 #if defined(__BORLANDC__)
 #if defined(__BORLANDC__)

-#pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #if wxUSE_SOUND
 #endif
 
 #if wxUSE_SOUND


@@ -38,11 +31,11 @@
     #include "wx/event.h"
     #include "wx/intl.h"
     #include "wx/log.h"
     #include "wx/event.h"
     #include "wx/intl.h"
     #include "wx/log.h"

+    #include "wx/module.h"

 #endif
 
 #include "wx/thread.h"
 #include "wx/file.h"
 #endif
 
 #include "wx/thread.h"
 #include "wx/file.h"

-#include "wx/module.h"

 #include "wx/sound.h"
 #include "wx/dynlib.h"
 
 #include "wx/sound.h"
 #include "wx/dynlib.h"
 


@@ -55,7 +48,7 @@ static wxMutex gs_soundMutex;
 // ----------------------------------------------------------------------------
 // wxSoundData
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // wxSoundData
 // ----------------------------------------------------------------------------

-  
+

 void wxSoundData::IncRef()
 {
 #if wxUSE_THREADS
 void wxSoundData::IncRef()
 {
 #if wxUSE_THREADS


@@ -111,7 +104,7 @@ public:
 class wxSoundBackendOSS : public wxSoundBackend
 {
 public:
 class wxSoundBackendOSS : public wxSoundBackend
 {
 public:

-    wxString GetName() const { return _T("Open Sound System"); }
+    wxString GetName() const { return wxT("Open Sound System"); }

     int GetPriority() const { return 10; }
     bool IsAvailable() const;
     bool HasNativeAsyncPlayback() const { return false; }
     int GetPriority() const { return 10; }
     bool IsAvailable() const;
     bool HasNativeAsyncPlayback() const { return false; }


@@ -122,10 +115,10 @@ public:
 
 private:
     int OpenDSP(const wxSoundData *data);
 
 private:
     int OpenDSP(const wxSoundData *data);

-    bool InitDSP(int dev, int iDataBits, int iChannel,
-                 unsigned long ulSamplingRate);
-    
+    bool InitDSP(int dev, const wxSoundData *data);
+

     int m_DSPblkSize;        // Size of the DSP buffer
     int m_DSPblkSize;        // Size of the DSP buffer

+    bool m_needConversion;

 };
 
 bool wxSoundBackendOSS::IsAvailable() const
 };
 
 bool wxSoundBackendOSS::IsAvailable() const


@@ -142,12 +135,12 @@ bool wxSoundBackendOSS::Play(wxSoundData *data, unsigned flags,
                              volatile wxSoundPlaybackStatus *status)
 {
     int dev = OpenDSP(data);
                              volatile wxSoundPlaybackStatus *status)
 {
     int dev = OpenDSP(data);

-    
+

     if (dev < 0)
         return false;
 
     ioctl(dev, SNDCTL_DSP_SYNC, 0);
     if (dev < 0)
         return false;
 
     ioctl(dev, SNDCTL_DSP_SYNC, 0);

- 
+

     do
     {
         bool play = true;
     do
     {
         bool play = true;


@@ -159,13 +152,13 @@ bool wxSoundBackendOSS::Play(wxSoundData *data, unsigned flags,
         {
             if (status->m_stopRequested)
             {
         {
             if (status->m_stopRequested)
             {

-                wxLogTrace(_T("sound"), _T("playback stopped"));
+                wxLogTrace(wxT("sound"), wxT("playback stopped"));

                 close(dev);
                 return true;
             }
 
             i= (int)((l + m_DSPblkSize) < datasize ?
                 close(dev);
                 return true;
             }
 
             i= (int)((l + m_DSPblkSize) < datasize ?

-                    m_DSPblkSize : (datasize - l));
+                     m_DSPblkSize : (datasize - l));

             if (write(dev, &data->m_data[l], i) != i)
             {
                 play = false;
             if (write(dev, &data->m_data[l], i) != i)
             {
                 play = false;


@@ -175,21 +168,17 @@ bool wxSoundBackendOSS::Play(wxSoundData *data, unsigned flags,
     } while (flags & wxSOUND_LOOP);
 
     close(dev);
     } while (flags & wxSOUND_LOOP);
 
     close(dev);

-    

     return true;
 }
 
 int wxSoundBackendOSS::OpenDSP(const wxSoundData *data)
 {
     int dev = -1;
     return true;
 }
 
 int wxSoundBackendOSS::OpenDSP(const wxSoundData *data)
 {
     int dev = -1;

-  
+

     if ((dev = open(AUDIODEV, O_WRONLY, 0)) <0)
         return -1;
     if ((dev = open(AUDIODEV, O_WRONLY, 0)) <0)
         return -1;

-  
-    if (!InitDSP(dev,
-                 (int)data->m_bitsPerSample,
-                 data->m_channels == 1 ? 0 : 1,
-                 data->m_samplingRate))
+
+    if (!InitDSP(dev, data) || m_needConversion)

     {
         close(dev);
         return -1;
     {
         close(dev);
         return -1;


@@ -198,20 +187,77 @@ int wxSoundBackendOSS::OpenDSP(const wxSoundData *data)
     return dev;
 }
 
     return dev;
 }
 

-bool wxSoundBackendOSS::InitDSP(int dev, int iDataBits, int iChannel,
-                               unsigned long ulSamplingRate)
+
+bool wxSoundBackendOSS::InitDSP(int dev, const wxSoundData *data)

 {
 {

-    if (ioctl(dev, SNDCTL_DSP_GETBLKSIZE, &m_DSPblkSize) < 0)
-        return false;
-    wxLogTrace(_T("sound"), _T("OSS block size: %i"), m_DSPblkSize);
-    if (m_DSPblkSize < 4096 || m_DSPblkSize > 65536)
+    unsigned tmp;
+
+    // Reset the dsp
+    if (ioctl(dev, SNDCTL_DSP_RESET, 0) < 0)
+    {
+        wxLogTrace(wxT("sound"), wxT("unable to reset dsp"));

         return false;
         return false;

-    if (ioctl(dev, SNDCTL_DSP_SAMPLESIZE, &iDataBits) < 0)
+    }
+
+    m_needConversion = false;
+
+    tmp = data->m_bitsPerSample;
+    if (ioctl(dev, SNDCTL_DSP_SAMPLESIZE, &tmp) < 0)
+    {
+        wxLogTrace(wxT("sound"), wxT("IOCTL failure (SNDCTL_DSP_SAMPLESIZE)"));

         return false;
         return false;

-    if (ioctl(dev, SNDCTL_DSP_STEREO, &iChannel) < 0)
+    }
+    if (tmp != data->m_bitsPerSample)
+    {
+        wxLogTrace(wxT("sound"),
+                   wxT("Unable to set DSP sample size to %d (wants %d)"),
+                   data->m_bitsPerSample, tmp);
+        m_needConversion = true;
+    }
+
+    unsigned stereo = data->m_channels == 1 ? 0 : 1;
+    tmp = stereo;
+    if (ioctl(dev, SNDCTL_DSP_STEREO, &tmp) < 0)
+    {
+        wxLogTrace(wxT("sound"), wxT("IOCTL failure (SNDCTL_DSP_STEREO)"));

         return false;
         return false;

-    if (ioctl(dev, SNDCTL_DSP_SPEED, &ulSamplingRate) < 0)
+    }
+    if (tmp != stereo)
+    {
+        wxLogTrace(wxT("sound"), wxT("Unable to set DSP to %s."), stereo?  wxT("stereo"):wxT("mono"));
+        m_needConversion = true;
+    }
+
+    tmp = data->m_samplingRate;
+    if (ioctl(dev, SNDCTL_DSP_SPEED, &tmp) < 0)
+    {
+        wxLogTrace(wxT("sound"), wxT("IOCTL failure (SNDCTL_DSP_SPEED)"));
+       return false;
+    }
+    if (tmp != data->m_samplingRate)
+    {
+        // If the rate the sound card is using is not within 1% of what the
+        // data specified then override the data setting.  The only reason not
+        // to always override this is because of clock-rounding
+        // problems. Sound cards will sometimes use things like 44101 when you
+        // ask for 44100.  No need overriding this and having strange output
+        // file rates for something that we can't hear anyways.
+        if (data->m_samplingRate - tmp > (tmp * .01) ||
+            tmp - data->m_samplingRate > (tmp * .01)) {
+            wxLogTrace(wxT("sound"),
+                       wxT("Unable to set DSP sampling rate to %d (wants %d)"),
+                       data->m_samplingRate, tmp);
+            m_needConversion = true;
+        }
+    }
+
+    // Do this last because some drivers can adjust the buffer sized based on
+    // the sampling rate, etc.
+    if (ioctl(dev, SNDCTL_DSP_GETBLKSIZE, &m_DSPblkSize) < 0)
+    {
+        wxLogTrace(wxT("sound"), wxT("IOCTL failure (SNDCTL_DSP_GETBLKSIZE)"));

         return false;
         return false;

+    }

     return true;
 }
 
     return true;
 }
 


@@ -234,7 +280,7 @@ public:
                               wxSoundData *data, unsigned flags)
         : wxThread(), m_adapt(adaptor), m_data(data), m_flags(flags) {}
     virtual ExitCode Entry();
                               wxSoundData *data, unsigned flags)
         : wxThread(), m_adapt(adaptor), m_data(data), m_flags(flags) {}
     virtual ExitCode Entry();

-    
+

 protected:
     wxSoundSyncOnlyAdaptor *m_adapt;
     wxSoundData *m_data;
 protected:
     wxSoundSyncOnlyAdaptor *m_adapt;
     wxSoundData *m_data;


@@ -250,7 +296,7 @@ class wxSoundSyncOnlyAdaptor : public wxSoundBackend
 public:
     wxSoundSyncOnlyAdaptor(wxSoundBackend *backend)
         : m_backend(backend), m_playing(false) {}
 public:
     wxSoundSyncOnlyAdaptor(wxSoundBackend *backend)
         : m_backend(backend), m_playing(false) {}

-    ~wxSoundSyncOnlyAdaptor()
+    virtual ~wxSoundSyncOnlyAdaptor()

     {
         delete m_backend;
     }
     {
         delete m_backend;
     }


@@ -298,7 +344,7 @@ wxThread::ExitCode wxSoundAsyncPlaybackThread::Entry()
     m_data->DecRef();
     m_adapt->m_playing = false;
     m_adapt->m_mutexRightToPlay.Unlock();
     m_data->DecRef();
     m_adapt->m_playing = false;
     m_adapt->m_mutexRightToPlay.Unlock();

-    wxLogTrace(_T("sound"), _T("terminated async playback thread"));
+    wxLogTrace(wxT("sound"), wxT("terminated async playback thread"));

     return 0;
 }
 #endif
     return 0;
 }
 #endif


@@ -317,7 +363,7 @@ bool wxSoundSyncOnlyAdaptor::Play(wxSoundData *data, unsigned flags,
         wxThread *th = new wxSoundAsyncPlaybackThread(this, data, flags);
         th->Create();
         th->Run();
         wxThread *th = new wxSoundAsyncPlaybackThread(this, data, flags);
         th->Create();
         th->Run();

-        wxLogTrace(_T("sound"), _T("launched async playback thread"));
+        wxLogTrace(wxT("sound"), wxT("launched async playback thread"));

         return true;
 #else
         wxLogError(_("Unable to play sound asynchronously."));
         return true;
 #else
         wxLogError(_("Unable to play sound asynchronously."));


@@ -339,19 +385,19 @@ bool wxSoundSyncOnlyAdaptor::Play(wxSoundData *data, unsigned flags,
 
 void wxSoundSyncOnlyAdaptor::Stop()
 {
 
 void wxSoundSyncOnlyAdaptor::Stop()
 {

-    wxLogTrace(_T("sound"), _T("asking audio to stop"));
-    
+    wxLogTrace(wxT("sound"), wxT("asking audio to stop"));
+

 #if wxUSE_THREADS
     // tell the player thread (if running) to stop playback ASAP:
     m_status.m_stopRequested = true;
 #if wxUSE_THREADS
     // tell the player thread (if running) to stop playback ASAP:
     m_status.m_stopRequested = true;

-    
+

     // acquire the mutex to be sure no sound is being played, then
     // release it because we don't need it for anything (the effect of this
     // is that calling thread will wait until playback thread reacts to
     // our request to interrupt playback):
     m_mutexRightToPlay.Lock();
     m_mutexRightToPlay.Unlock();
     // acquire the mutex to be sure no sound is being played, then
     // release it because we don't need it for anything (the effect of this
     // is that calling thread will wait until playback thread reacts to
     // our request to interrupt playback):
     m_mutexRightToPlay.Lock();
     m_mutexRightToPlay.Unlock();

-    wxLogTrace(_T("sound"), _T("audio was stopped"));
+    wxLogTrace(wxT("sound"), wxT("audio was stopped"));

 #endif
 }
 
 #endif
 }
 


@@ -360,13 +406,13 @@ bool wxSoundSyncOnlyAdaptor::IsPlaying() const
 #if wxUSE_THREADS
     return m_status.m_playing;
 #else
 #if wxUSE_THREADS
     return m_status.m_playing;
 #else

-    return FALSE;
+    return false;

 #endif
 }
 
 
 // ----------------------------------------------------------------------------
 #endif
 }
 
 
 // ----------------------------------------------------------------------------

-// wxSound 
+// wxSound

 // ----------------------------------------------------------------------------
 
 wxSoundBackend *wxSound::ms_backend = NULL;
 // ----------------------------------------------------------------------------
 
 wxSoundBackend *wxSound::ms_backend = NULL;


@@ -389,7 +435,7 @@ wxSound::wxSound(const wxString& sFileName, bool isResource) : m_data(NULL)
     Create(sFileName, isResource);
 }
 
     Create(sFileName, isResource);
 }
 

-wxSound::wxSound(int size, const wxByte* data) : m_data(NULL)
+wxSound::wxSound(size_t size, const void* data) : m_data(NULL)

 {
     Create(size, data);
 }
 {
     Create(size, data);
 }


@@ -399,38 +445,45 @@ wxSound::~wxSound()
     Free();
 }
 
     Free();
 }
 

-bool wxSound::Create(const wxString& fileName, bool isResource)
+bool wxSound::Create(const wxString& fileName,
+                     bool WXUNUSED_UNLESS_DEBUG(isResource))

 {
     wxASSERT_MSG( !isResource,
 {
     wxASSERT_MSG( !isResource,

-             _T("Loading sound from resources is only supported on Windows") );
- 
+             wxT("Loading sound from resources is only supported on Windows") );
+

     Free();
     Free();

-  
+

     wxFile fileWave;
     if (!fileWave.Open(fileName, wxFile::read))
     wxFile fileWave;
     if (!fileWave.Open(fileName, wxFile::read))

-       {
-            return false;
-       }
+    {
+        return false;
+    }
+
+    wxFileOffset lenOrig = fileWave.Length();
+    if ( lenOrig == wxInvalidOffset )
+        return false;

 
 

-    size_t len = fileWave.Length();
+    size_t len = wx_truncate_cast(size_t, lenOrig);

     wxUint8 *data = new wxUint8[len];
     wxUint8 *data = new wxUint8[len];

-    if (fileWave.Read(data, len) != len)
+    if ( fileWave.Read(data, len) != lenOrig )

     {
     {

+        delete [] data;

         wxLogError(_("Couldn't load sound data from '%s'."), fileName.c_str());
         return false;
     }
 
     if (!LoadWAV(data, len, false))
     {
         wxLogError(_("Couldn't load sound data from '%s'."), fileName.c_str());
         return false;
     }
 
     if (!LoadWAV(data, len, false))
     {

+        delete [] data;

         wxLogError(_("Sound file '%s' is in unsupported format."),
                    fileName.c_str());
         return false;
     }
         wxLogError(_("Sound file '%s' is in unsupported format."),
                    fileName.c_str());
         return false;
     }

-    
+

     return true;
 }
 
     return true;
 }
 

-bool wxSound::Create(int size, const wxByte* data)
+bool wxSound::Create(size_t size, const void* data)

 {
     wxASSERT( data != NULL );
 
 {
     wxASSERT( data != NULL );
 


@@ -449,27 +502,19 @@ bool wxSound::Create(int size, const wxByte* data)
     {
         // FIXME -- make this fully dynamic when plugins architecture is in
         // place
     {
         // FIXME -- make this fully dynamic when plugins architecture is in
         // place

-#ifdef HAVE_SYS_SOUNDCARD_H
-        ms_backend = new wxSoundBackendOSS();
-        if (!ms_backend->IsAvailable())
-        {
-            wxDELETE(ms_backend);
-        }
-#endif
-

 #if wxUSE_LIBSDL
 #if wxUSE_LIBSDL

-        if (!ms_backend)
+        //if (!ms_backend)

         {
 #if !wxUSE_PLUGINS
             ms_backend = wxCreateSoundBackendSDL();
 #else
             wxString dllname;
         {
 #if !wxUSE_PLUGINS
             ms_backend = wxCreateSoundBackendSDL();
 #else
             wxString dllname;

-            dllname.Printf(_T("%s/%s"),
+            dllname.Printf(wxT("%s/%s"),

                 wxDynamicLibrary::GetPluginsDirectory().c_str(),
                 wxDynamicLibrary::CanonicalizePluginName(
                 wxDynamicLibrary::GetPluginsDirectory().c_str(),
                 wxDynamicLibrary::CanonicalizePluginName(

-                    _T("sound_sdl"), wxDL_PLUGIN_BASE).c_str());
-            wxLogTrace(_T("sound"),
-                       _T("trying to load SDL plugin from '%s'..."),
+                    wxT("sound_sdl"), wxDL_PLUGIN_BASE).c_str());
+            wxLogTrace(wxT("sound"),
+                       wxT("trying to load SDL plugin from '%s'..."),

                        dllname.c_str());
             wxLogNull null;
             ms_backendSDL = new wxDynamicLibrary(dllname, wxDL_NOW);
                        dllname.c_str());
             wxLogNull null;
             ms_backendSDL = new wxDynamicLibrary(dllname, wxDL_NOW);


@@ -495,14 +540,25 @@ bool wxSound::Create(int size, const wxByte* data)
         }
 #endif
 
         }
 #endif
 

+#ifdef HAVE_SYS_SOUNDCARD_H
+        if (!ms_backend)
+        {
+            ms_backend = new wxSoundBackendOSS();
+            if (!ms_backend->IsAvailable())
+            {
+                wxDELETE(ms_backend);
+            }
+        }
+#endif
+

         if (!ms_backend)
             ms_backend = new wxSoundBackendNull();
 
         if (!ms_backend->HasNativeAsyncPlayback())
             ms_backend = new wxSoundSyncOnlyAdaptor(ms_backend);
 
         if (!ms_backend)
             ms_backend = new wxSoundBackendNull();
 
         if (!ms_backend->HasNativeAsyncPlayback())
             ms_backend = new wxSoundSyncOnlyAdaptor(ms_backend);
 

-        wxLogTrace(_T("sound"),
-                   _T("using backend '%s'"), ms_backend->GetName().c_str());
+        wxLogTrace(wxT("sound"),
+                   wxT("using backend '%s'"), ms_backend->GetName().c_str());

     }
 }
 
     }
 }
 


@@ -510,12 +566,11 @@ bool wxSound::Create(int size, const wxByte* data)
 {
     if (ms_backend)
     {
 {
     if (ms_backend)
     {

-        wxLogTrace(_T("sound"), _T("unloading backend"));
+        wxLogTrace(wxT("sound"), wxT("unloading backend"));

 
         Stop();
 
         Stop();

- 
-        delete ms_backend;
-        ms_backend = NULL;
+
+        wxDELETE(ms_backend);

 #if wxUSE_LIBSDL && wxUSE_PLUGINS
         delete ms_backendSDL;
 #endif
 #if wxUSE_LIBSDL && wxUSE_PLUGINS
         delete ms_backendSDL;
 #endif


@@ -524,7 +579,7 @@ bool wxSound::Create(int size, const wxByte* data)
 
 bool wxSound::DoPlay(unsigned flags) const
 {
 
 bool wxSound::DoPlay(unsigned flags) const
 {

-    wxCHECK_MSG( IsOk(), false, _T("Attempt to play invalid wave data") );
+    wxCHECK_MSG( IsOk(), false, wxT("Attempt to play invalid wave data") );

 
     EnsureBackend();
     wxSoundPlaybackStatus status;
 
     EnsureBackend();
     wxSoundPlaybackStatus status;


@@ -554,7 +609,7 @@ void wxSound::Free()
 }
 
 typedef struct
 }
 
 typedef struct

-{ 
+{

     wxUint32      uiSize;
     wxUint16      uiFormatTag;
     wxUint16      uiChannels;
     wxUint32      uiSize;
     wxUint16      uiFormatTag;
     wxUint16      uiChannels;


@@ -564,19 +619,38 @@ typedef struct
     wxUint16      uiBitsPerSample;
 } WAVEFORMAT;
 
     wxUint16      uiBitsPerSample;
 } WAVEFORMAT;
 

-#define MONO             1  // and stereo is 2 by wav format

 #define WAVE_FORMAT_PCM  1
 #define WAVE_INDEX       8
 #define FMT_INDEX       12
 
 #define WAVE_FORMAT_PCM  1
 #define WAVE_INDEX       8
 #define FMT_INDEX       12
 

-bool wxSound::LoadWAV(const wxUint8 *data, size_t length, bool copyData)
+bool wxSound::LoadWAV(const void* data_, size_t length, bool copyData)

 {
 {

-    WAVEFORMAT waveformat;
-    wxUint32 ul;
-
-    if (length < 32 + sizeof(WAVEFORMAT))
+    // the simplest wave file header consists of 44 bytes:
+    //
+    //      0   "RIFF"
+    //      4   file size - 8
+    //      8   "WAVE"
+    //
+    //      12  "fmt "
+    //      16  chunk size                  |
+    //      20  format tag                  |
+    //      22  number of channels          |
+    //      24  sample rate                 | WAVEFORMAT
+    //      28  average bytes per second    |
+    //      32  bytes per frame             |
+    //      34  bits per sample             |
+    //
+    //      36  "data"
+    //      40  number of data bytes
+    //      44  (wave signal) data
+    //
+    // so check that we have at least as much
+    if ( length < 44 )

         return false;
 
         return false;
 

+    const wxUint8* data = static_cast<const wxUint8*>(data_);
+
+    WAVEFORMAT waveformat;

     memcpy(&waveformat, &data[FMT_INDEX + 4], sizeof(WAVEFORMAT));
     waveformat.uiSize = wxUINT32_SWAP_ON_BE(waveformat.uiSize);
     waveformat.uiFormatTag = wxUINT16_SWAP_ON_BE(waveformat.uiFormatTag);
     memcpy(&waveformat, &data[FMT_INDEX + 4], sizeof(WAVEFORMAT));
     waveformat.uiSize = wxUINT32_SWAP_ON_BE(waveformat.uiSize);
     waveformat.uiFormatTag = wxUINT16_SWAP_ON_BE(waveformat.uiFormatTag);


@@ -586,6 +660,14 @@ bool wxSound::LoadWAV(const wxUint8 *data, size_t length, bool copyData)
     waveformat.uiBlockAlign = wxUINT16_SWAP_ON_BE(waveformat.uiBlockAlign);
     waveformat.uiBitsPerSample = wxUINT16_SWAP_ON_BE(waveformat.uiBitsPerSample);
 
     waveformat.uiBlockAlign = wxUINT16_SWAP_ON_BE(waveformat.uiBlockAlign);
     waveformat.uiBitsPerSample = wxUINT16_SWAP_ON_BE(waveformat.uiBitsPerSample);
 

+    // get the sound data size
+    wxUint32 ul;
+    memcpy(&ul, &data[FMT_INDEX + waveformat.uiSize + 12], 4);
+    ul = wxUINT32_SWAP_ON_BE(ul);
+
+    if ( length < ul + FMT_INDEX + waveformat.uiSize + 16 )
+        return false;
+

     if (memcmp(data, "RIFF", 4) != 0)
         return false;
     if (memcmp(&data[WAVE_INDEX], "WAVE", 4) != 0)
     if (memcmp(data, "RIFF", 4) != 0)
         return false;
     if (memcmp(&data[WAVE_INDEX], "WAVE", 4) != 0)


@@ -594,20 +676,14 @@ bool wxSound::LoadWAV(const wxUint8 *data, size_t length, bool copyData)
         return false;
     if (memcmp(&data[FMT_INDEX + waveformat.uiSize + 8], "data", 4) != 0)
         return false;
         return false;
     if (memcmp(&data[FMT_INDEX + waveformat.uiSize + 8], "data", 4) != 0)
         return false;

-    memcpy(&ul,&data[FMT_INDEX + waveformat.uiSize + 12], 4);
-    ul = wxUINT32_SWAP_ON_BE(ul);
-    
-    //WAS: if (ul + FMT_INDEX + waveformat.uiSize + 16 != length)
-    if (ul + FMT_INDEX + waveformat.uiSize + 16 > length)
-        return false;
-  
+

     if (waveformat.uiFormatTag != WAVE_FORMAT_PCM)
         return false;
     if (waveformat.uiFormatTag != WAVE_FORMAT_PCM)
         return false;

-  
-    if (waveformat.ulSamplesPerSec != 
+
+    if (waveformat.ulSamplesPerSec !=

         waveformat.ulAvgBytesPerSec / waveformat.uiBlockAlign)
         return false;
         waveformat.ulAvgBytesPerSec / waveformat.uiBlockAlign)
         return false;

-    
+

     m_data = new wxSoundData;
     m_data->m_channels = waveformat.uiChannels;
     m_data->m_samplingRate = waveformat.ulSamplesPerSec;
     m_data = new wxSoundData;
     m_data->m_channels = waveformat.uiChannels;
     m_data->m_samplingRate = waveformat.ulSamplesPerSec;


@@ -623,7 +699,7 @@ bool wxSound::LoadWAV(const wxUint8 *data, size_t length, bool copyData)
     else
         m_data->m_dataWithHeader = (wxUint8*)data;
 
     else
         m_data->m_dataWithHeader = (wxUint8*)data;
 

-    m_data->m_data = 
+    m_data->m_data =

         (&m_data->m_dataWithHeader[FMT_INDEX + waveformat.uiSize + 8]);
 
     return true;
         (&m_data->m_dataWithHeader[FMT_INDEX + waveformat.uiSize + 8]);
 
     return true;