utils/wxMMedia2/lib/sndesd.cpp

   1 // --------------------------------------------------------------------------
   2 // Name: sndesd.cpp
   3 // Purpose:
   4 // Date: 08/11/1999
   5 // Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999
   6 // CVSID: $Id$
   7 // --------------------------------------------------------------------------
   8 #ifdef __GNUG__
   9 #pragma implementation "sndesd.cpp"
  10 #endif
  11
  12 #include <sys/types.h>
  13 #include <sys/stat.h>
  14 #include <unistd.h>
  15 #include <wx/defs.h>
  16 #include <wx/string.h>
  17 #include <esd.h>
  18 #include "sndbase.h"
  19 #include "sndesd.h"
  20 #include "sndpcm.h"
  21 #ifdef __WXGTK__
  22 #include <gdk/gdk.h>
  23 #endif
  24
  25 #define MY_ESD_NAME "wxWindows/wxSoundStreamESD"
  26
  27 wxSoundStreamESD::wxSoundStreamESD(const wxString& hostname)
  28 {
  29   wxSoundFormatPcm pcm_default;
  30
  31   m_fd = esd_monitor_stream(ESD_MONO | ESD_BITS8 | ESD_RECORD, 22050,
  32                             hostname.mb_str(), MY_ESD_NAME);
  33
  34   if (m_fd == -1) {
  35     m_snderror = wxSOUND_INVDEV;
  36     return;
  37   }
  38
  39   esd_close(m_fd);
  40
  41   m_hostname = hostname;
  42
  43   SetSoundFormat(pcm_default);
  44
  45   m_snderror = wxSOUND_NOERR;
  46   m_esd_stop = TRUE;
  47 }
  48
  49 wxSoundStreamESD::~wxSoundStreamESD()
  50 {
  51   if (m_fd > 0)
  52     esd_close(m_fd);
  53 }
  54
  55 wxSoundStream& wxSoundStreamESD::Read(void *buffer, size_t len)
  56 {
  57   int ret;
  58
  59   m_lastcount = (size_t)ret = read(m_fd, buffer, len);
  60
  61   if (ret < 0)
  62     m_snderror = wxSOUND_IOERR;
  63   else
  64     m_snderror = wxSOUND_NOERR;
  65
  66   return *this;
  67 }
  68
  69 wxSoundStream& wxSoundStreamESD::Write(const void *buffer, size_t len)
  70 {
  71   int ret;
  72
  73   m_lastcount = (size_t)ret = write(m_fd, buffer, len);
  74
  75   if (ret < 0)
  76     m_snderror = wxSOUND_IOERR;
  77   else
  78     m_snderror = wxSOUND_NOERR;
  79
  80   return *this;
  81 }
  82
  83 bool wxSoundStreamESD::SetSoundFormat(const wxSoundFormatBase& format)
  84 {
  85   wxSoundFormatPcm *pcm_format;
  86
  87   if (format.GetType() != wxSOUND_PCM) {
  88     m_snderror = wxSOUND_INVFRMT;
  89     return FALSE;
  90   }
  91
  92   if (m_fd == -1) {
  93     m_snderror = wxSOUND_INVDEV;
  94     return FALSE;
  95   }
  96
  97   if (m_sndformat)
  98     delete m_sndformat;
  99
 100   m_sndformat = format.Clone();
 101   if (!m_sndformat) {
 102     m_snderror = wxSOUND_MEMERR;
 103     return FALSE;
 104   }
 105   pcm_format = (wxSoundFormatPcm *)m_sndformat;
 106
 107   // Detect the best format
 108   DetectBest(pcm_format);
 109
 110   m_snderror = wxSOUND_NOERR;
 111   if (*pcm_format != format) {
 112     m_snderror = wxSOUND_NOTEXACT;
 113     return FALSE;
 114   }
 115   return TRUE;
 116 }
 117
 118 #ifdef __WXGTK__
 119 static void _wxSound_OSS_CBack(gpointer data, int source,
 120                                GdkInputCondition condition)
 121 {
 122   wxSoundStreamESD *esd = (wxSoundStreamESD *)data;
 123
 124   switch (condition) {
 125   case GDK_INPUT_READ:
 126     esd->WakeUpEvt(wxSOUND_INPUT);
 127     break;
 128   case GDK_INPUT_WRITE:
 129     esd->WakeUpEvt(wxSOUND_OUTPUT);
 130     break;
 131   default:
 132     break;
 133   }
 134 }
 135 #endif
 136
 137 void wxSoundStreamESD::WakeUpEvt(int evt)
 138 {
 139   OnSoundEvent(evt);
 140 }
 141
 142 bool wxSoundStreamESD::StartProduction(int evt)
 143 {
 144   wxSoundFormatPcm *pcm;
 145   int flag = 0;
 146
 147   if (!m_esd_stop)
 148     StopProduction();
 149
 150   pcm = (wxSoundFormatPcm *)m_sndformat;
 151
 152   flag |= (pcm->GetBPS() == 16) ? ESD_BITS16 : ESD_BITS8;
 153   flag |= (pcm->GetChannels() == 2) ? ESD_STEREO : ESD_MONO;
 154
 155   if (evt == wxSOUND_OUTPUT) {
 156     flag |= ESD_PLAY | ESD_STREAM;
 157     m_fd = esd_play_stream(flag, pcm->GetSampleRate(), m_hostname.mb_str(),
 158                            MY_ESD_NAME);
 159   } else {
 160     flag |= ESD_RECORD | ESD_STREAM;
 161     m_fd = esd_record_stream(flag, pcm->GetSampleRate(), m_hostname.mb_str(),
 162                              MY_ESD_NAME);
 163   }
 164
 165 #ifdef __WXGTK__
 166   if (evt == wxSOUND_OUTPUT)
 167     m_tag = gdk_input_add(m_fd, GDK_INPUT_WRITE, _wxSound_OSS_CBack, (gpointer)this);
 168   else
 169     m_tag = gdk_input_add(m_fd, GDK_INPUT_READ, _wxSound_OSS_CBack, (gpointer)this);
 170 #endif
 171
 172   m_esd_stop = FALSE;
 173
 174   return TRUE;
 175 }
 176
 177 bool wxSoundStreamESD::StopProduction()
 178 {
 179   if (m_esd_stop)
 180     return FALSE;
 181
 182   gdk_input_remove(m_tag);
 183   esd_close(m_fd);
 184   m_esd_stop = TRUE;
 185   return TRUE;
 186 }
 187
 188 //
 189 // Detect the closest format (The best).
 190 //
 191 void wxSoundStreamESD::DetectBest(wxSoundFormatPcm *pcm)
 192 {
 193   wxSoundFormatPcm best_pcm;
 194
 195   // We change neither the number of channels nor the sample rate
 196
 197   best_pcm.SetSampleRate(pcm->GetSampleRate());
 198   best_pcm.SetChannels(pcm->GetChannels());
 199
 200   // It supports 16 bits
 201   if (pcm->GetBPS() == 16)
 202     best_pcm.SetBPS(16);
 203
 204   best_pcm.SetOrder(wxLITTLE_ENDIAN);
 205   best_pcm.Signed(TRUE);
 206
 207   // Finally recopy the new format
 208   *pcm = best_pcm;
 209 }