* Added wxMMedia in the repository so people interrested in it can work on it

[wxWidgets.git] / utils / wxMMedia / sndmulaw.cpp

diff --git a/utils/wxMMedia/sndmulaw.cpp b/utils/wxMMedia/sndmulaw.cpp
new file mode 100644 (file)
index 0000000..f42e5a4
--- /dev/null
+++ b/utils/wxMMedia/sndmulaw.cpp
@@ -0,0 +1,85 @@
+#ifdef __GNUG__
+#pragma implementation "sndmulaw.h"
+#endif
+
+#include "sndsnd.h"
+#include "sndfrmt.h"
+#include "sndmulaw.h"
+#include "adpcm/g72x.h"
+
+wxSoundMulawCodec::wxSoundMulawCodec()
+  : wxSoundCodec()
+{
+}
+
+wxSoundMulawCodec::~wxSoundMulawCodec()
+{
+}
+
+void wxSoundMulawCodec::Decode()
+{
+  int smp;
+  wxSoundDataFormat pref_frmt;
+
+  pref_frmt = GetPreferredFormat(0);
+  if (m_io_format != pref_frmt)
+    ChainCodecAfter(pref_frmt);
+
+  InitMode(DECODING);
+
+  while (!Good()) {
+      smp = ulaw2linear(m_in_sound->GetChar());
+#ifdef USE_BE_MACH
+      m_out_sound->PutChar((smp & 0xff00) >> 8);
+      m_out_sound->PutChar(smp & 0xff);
+#else
+      m_out_sound->PutChar(smp & 0xff);
+      m_out_sound->PutChar((smp & 0xff00) >> 8);
+#endif
+  }
+}
+
+void wxSoundMulawCodec::Encode()
+{
+  int smp;
+  wxSoundDataFormat pref_frmt;
+
+  pref_frmt = GetPreferredFormat(0);
+  if (m_io_format != pref_frmt)
+    ChainCodecBefore(pref_frmt);
+
+  InitMode(ENCODING);
+
+  while (!Good()) {
+#ifdef USE_BE_MACH
+      smp = ((unsigned short)m_in_sound->GetChar()) << 8;
+      smp |= m_in_sound->GetChar() & 0xff;
+#else
+      smp = m_in_sound->GetChar() & 0xff;
+      smp |= ((unsigned short)m_in_sound->GetChar()) << 8;
+#endif
+      m_out_sound->PutChar(linear2ulaw(smp));
+  }
+}
+
+size_t wxSoundMulawCodec::GetByteRate() const
+{
+  return m_srate;
+}
+
+wxSoundDataFormat wxSoundMulawCodec::GetPreferredFormat(int WXUNUSED(no)) const
+{
+  wxSoundDataFormat format;
+
+  format.SetCodecNo(WXSOUND_PCM);
+  format.SetSampleRate(m_srate);
+  format.SetBps(16);
+  format.SetChannels(1);
+  format.SetSign(wxSND_SAMPLE_SIGNED);
+#ifdef USE_BE_MACH
+  format.SetByteOrder(wxSND_SAMPLE_BE);
+#else
+  format.SetByteOrder(wxSND_SAMPLE_LE);
+#endif
+  return format;
+}