+// --------------------------------------------------------------------------
+// Name: sndoss.cpp
+// Purpose:
+// Date: 08/11/1999
+// Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999
+// CVSID: $Id$
+// --------------------------------------------------------------------------
+#ifdef __GNUG__
+#pragma implementation "sndoss.cpp"
+#endif
+
+#include <sys/soundcard.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <wx/defs.h>
+#include <wx/string.h>
+#include "sndbase.h"
+#include "sndoss.h"
+#include "sndpcm.h"
+#ifdef __WXGTK__
+#include <gdk/gdk.h>
+#endif
+
+wxSoundStreamOSS::wxSoundStreamOSS(const wxString& dev_name)
+{
+ wxSoundFormatPcm pcm_default;
+
+ m_fd = open(dev_name.mb_str(), O_RDWR);
+
+ if (m_fd == -1) {
+ m_snderror = wxSOUND_INVDEV;
+ return;
+ }
+
+ m_devname = dev_name;
+
+ wxSoundStreamOSS::SetSoundFormat(pcm_default);
+
+ ioctl(m_fd, SNDCTL_DSP_GETBLKSIZE, &m_bufsize);
+
+ m_snderror = wxSOUND_NOERR;
+
+ close(m_fd);
+
+ m_oss_stop = TRUE;
+}
+
+wxSoundStreamOSS::~wxSoundStreamOSS()
+{
+ if (m_fd > 0)
+ close(m_fd);
+}
+
+wxUint32 wxSoundStreamOSS::GetBestSize() const
+{
+ return m_bufsize;
+}
+
+wxSoundStream& wxSoundStreamOSS::Read(void *buffer, size_t len)
+{
+ int ret;
+
+ m_lastcount = (size_t)ret = read(m_fd, buffer, len);
+
+ if (ret < 0)
+ m_snderror = wxSOUND_IOERR;
+ else
+ m_snderror = wxSOUND_NOERR;
+
+ return *this;
+}
+
+wxSoundStream& wxSoundStreamOSS::Write(const void *buffer, size_t len)
+{
+ int ret;
+
+ m_lastcount = (size_t)ret = write(m_fd, buffer, len);
+
+ if (ret < 0)
+ m_snderror = wxSOUND_IOERR;
+ else
+ m_snderror = wxSOUND_NOERR;
+
+ return *this;
+}
+
+bool wxSoundStreamOSS::SetSoundFormat(const wxSoundFormatBase& format)
+{
+ int tmp;
+ wxSoundFormatPcm *pcm_format;
+
+ if (format.GetType() != wxSOUND_PCM) {
+ m_snderror = wxSOUND_INVFRMT;
+ return FALSE;
+ }
+
+ if (m_fd == -1) {
+ m_snderror = wxSOUND_INVDEV;
+ return FALSE;
+ }
+
+ if (m_sndformat)
+ delete m_sndformat;
+
+ m_sndformat = format.Clone();
+ if (!m_sndformat) {
+ m_snderror = wxSOUND_MEMERR;
+ return FALSE;
+ }
+ pcm_format = (wxSoundFormatPcm *)m_sndformat;
+
+ // Set the sample rate field.
+ tmp = pcm_format->GetSampleRate();
+ ioctl(m_fd, SNDCTL_DSP_SPEED, &tmp);
+
+ pcm_format->SetSampleRate(tmp);
+
+ // Detect the best format
+ DetectBest(pcm_format);
+ SetupFormat(pcm_format);
+
+ tmp = pcm_format->GetChannels();
+ ioctl(m_fd, SNDCTL_DSP_CHANNELS, &tmp);
+ pcm_format->SetChannels(tmp);
+
+ m_snderror = wxSOUND_NOERR;
+ if (*pcm_format != format) {
+ m_snderror = wxSOUND_NOTEXACT;
+ return FALSE;
+ }
+ return TRUE;
+}
+
+bool wxSoundStreamOSS::SetupFormat(wxSoundFormatPcm *pcm_format)
+{
+ int tmp;
+
+ switch(pcm_format->GetBPS()) {
+ case 8:
+ if (pcm_format->Signed())
+ tmp = AFMT_S8;
+ else
+ tmp = AFMT_U8;
+ break;
+ case 16:
+ switch (pcm_format->GetOrder()) {
+ case wxBIG_ENDIAN:
+ if (pcm_format->Signed())
+ tmp = AFMT_S16_BE;
+ else
+ tmp = AFMT_U16_BE;
+ break;
+ case wxLITTLE_ENDIAN:
+ if (pcm_format->Signed())
+ tmp = AFMT_S16_LE;
+ else
+ tmp = AFMT_U16_LE;
+ break;
+ }
+ break;
+ }
+
+ ioctl(m_fd, SNDCTL_DSP_SETFMT, &tmp);
+
+ // Demangling.
+ switch (tmp) {
+ case AFMT_U8:
+ pcm_format->SetBPS(8);
+ pcm_format->Signed(FALSE);
+ break;
+ case AFMT_S8:
+ pcm_format->SetBPS(8);
+ pcm_format->Signed(TRUE);
+ break;
+ case AFMT_U16_LE:
+ pcm_format->SetBPS(16);
+ pcm_format->Signed(FALSE);
+ pcm_format->SetOrder(wxLITTLE_ENDIAN);
+ break;
+ case AFMT_U16_BE:
+ pcm_format->SetBPS(16);
+ pcm_format->Signed(FALSE);
+ pcm_format->SetOrder(wxBIG_ENDIAN);
+ break;
+ case AFMT_S16_LE:
+ pcm_format->SetBPS(16);
+ pcm_format->Signed(TRUE);
+ pcm_format->SetOrder(wxLITTLE_ENDIAN);
+ break;
+ case AFMT_S16_BE:
+ pcm_format->SetBPS(16);
+ pcm_format->Signed(TRUE);
+ pcm_format->SetOrder(wxBIG_ENDIAN);
+ break;
+ }
+ return TRUE;
+}
+
+#ifdef __WXGTK__
+static void _wxSound_OSS_CBack(gpointer data, int source,
+ GdkInputCondition condition)
+{
+ wxSoundStreamOSS *oss = (wxSoundStreamOSS *)data;
+
+ switch (condition) {
+ case GDK_INPUT_READ:
+ oss->WakeUpEvt(wxSOUND_INPUT);
+ break;
+ case GDK_INPUT_WRITE:
+ oss->WakeUpEvt(wxSOUND_OUTPUT);
+ break;
+ default:
+ break;
+ }
+}
+#endif
+
+void wxSoundStreamOSS::WakeUpEvt(int evt)
+{
+ OnSoundEvent(evt);
+}
+
+bool wxSoundStreamOSS::StartProduction(int evt)
+{
+ wxSoundFormatBase *old_frmt;
+
+ if (!m_oss_stop)
+ StopProduction();
+
+ old_frmt = m_sndformat->Clone();
+
+ if (evt == wxSOUND_OUTPUT)
+ m_fd = open(m_devname.mb_str(), O_WRONLY);
+ else if (evt == wxSOUND_INPUT)
+ m_fd = open(m_devname.mb_str(), O_RDONLY);
+
+ if (m_fd == -1) {
+ m_snderror = wxSOUND_INVDEV;
+ return FALSE;
+ }
+
+ SetSoundFormat(*old_frmt);
+ delete old_frmt;
+
+#ifdef __WXGTK__
+ int trig;
+
+ if (evt == wxSOUND_OUTPUT) {
+ m_tag = gdk_input_add(m_fd, GDK_INPUT_WRITE, _wxSound_OSS_CBack, (gpointer)this);
+ trig = PCM_ENABLE_OUTPUT;
+ } else {
+ m_tag = gdk_input_add(m_fd, GDK_INPUT_READ, _wxSound_OSS_CBack, (gpointer)this);
+ trig = PCM_ENABLE_INPUT;
+ }
+#else
+ while (!m_oss_stop)
+ OnSoundEvent(evt);
+#endif
+
+ ioctl(m_fd, SNDCTL_DSP_SETTRIGGER, &trig);
+
+ m_oss_stop = FALSE;
+
+ return TRUE;
+}
+
+bool wxSoundStreamOSS::StopProduction()
+{
+ if (m_oss_stop)
+ return FALSE;
+
+#ifdef __WXGTK__
+ gdk_input_remove(m_tag);
+#endif
+
+ close(m_fd);
+ m_oss_stop = TRUE;
+ return TRUE;
+}
+
+//
+// Detect the closest format (The best).
+//
+void wxSoundStreamOSS::DetectBest(wxSoundFormatPcm *pcm)
+{
+#define MASK_16BITS (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE)
+
+ int fmt_mask;
+ wxSoundFormatPcm best_pcm;
+
+ // We change neither the number of channels nor the sample rate
+
+ best_pcm.SetSampleRate(pcm->GetSampleRate());
+ best_pcm.SetChannels(pcm->GetChannels());
+
+ // Get the supported format by the sound card
+ ioctl(m_fd, SNDCTL_DSP_GETFMTS, &fmt_mask);
+
+ // It supports 16 bits
+ if (pcm->GetBPS() == 16 && ((fmt_mask & MASK_16BITS) != 0))
+ best_pcm.SetBPS(16);
+
+ // It supports big endianness
+ if (pcm->GetOrder() == wxBIG_ENDIAN && ((fmt_mask & (AFMT_S16_BE | AFMT_U16_BE)) != 0))
+ best_pcm.SetOrder(wxBIG_ENDIAN);
+
+ // It supports little endianness
+ if (pcm->GetOrder() == wxLITTLE_ENDIAN && ((fmt_mask & (AFMT_S16_LE | AFMT_U16_LE)) != 0))
+ best_pcm.SetOrder(wxLITTLE_ENDIAN);
+
+ // It supports signed samples
+ if (pcm->Signed() && ((fmt_mask & (AFMT_S16_LE | AFMT_S16_BE | AFMT_S8)) != 0))
+ best_pcm.Signed(TRUE);
+
+ // It supports unsigned samples
+ if (!pcm->Signed() && ((fmt_mask & (AFMT_U16_LE | AFMT_U16_BE | AFMT_U8)) != 0))
+ best_pcm.Signed(FALSE);
+
+ // Finally recopy the new format
+ *pcm = best_pcm;
+}
projects / wxWidgets.git / blobdiff