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

* WARNING! It is quite unstable on Windows and it doesn't work on Linux for
  the moment because I didn't finish fixing the CODEC stream.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@975 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

utils/wxMMedia/sndpcm.cpp

@@ -0,0 +1,216 @@
+#ifdef __GNUG__
+#pragma implementation "sndpcm.h"
+#endif
+#include "sndsnd.h"
+#include "sndpcm.h"
+#include <dmalloc.h>
+
+#define WX_BIG_ENDIAN 0
+
+wxSoundPcmCodec::wxSoundPcmCodec()
+  : wxSoundCodec()
+{
+  m_orig_format.SetCodecCreate(FALSE);
+  m_orig_format.SetCodecNo(1);
+  m_char_bool = FALSE;
+}
+
+wxSoundPcmCodec::~wxSoundPcmCodec()
+{
+}
+
+size_t wxSoundPcmCodec::GetByteRate() const
+{
+  return (m_orig_format.GetBps()/8)*
+          m_orig_format.GetSampleRate()*
+          m_orig_format.GetChannels();
+}
+
+wxSoundDataFormat wxSoundPcmCodec::GetPreferredFormat(int codec) const
+{
+  wxSoundDataFormat prefFormat;
+
+  prefFormat = m_orig_format;
+  prefFormat.SetCodecNo(WXSOUND_PCM);
+  return prefFormat;
+}
+
+// ---------------------------------------------------------------------------
+// Main part of the decoder
+// ---------------------------------------------------------------------------
+
+void wxSoundPcmCodec::Decode()
+{
+  InitMode(DECODING);
+  if (m_io_format == m_orig_format) {
+    CopyToOutput();
+    ExitMode();
+    return;
+  }
+
+  // Swap bytes
+  switch (m_io_format.GetBps()) {
+  case 8:
+    InputSign8();
+    break;
+  case 16:
+    InputSwapAndSign16();
+    break;
+  case 32:
+  case 64:
+  default:
+    break;
+  }
+  ExitMode();
+}
+
+// ---------------------------------------------------------------------------
+// Change the sign of a 8-bit sample.
+
+#define GET() (m_in_sound->GetChar())
+#define PUT(c) (m_out_sound->PutChar(c))
+#define OUT_ERROR() (out->LastError() == wxStream_NOERROR)
+#define IN_ERROR() (in->LastError() == wxStream_NOERROR)
+
+void wxSoundPcmCodec::InputSign8()
+{
+  unsigned char signer = 0;
+  wxStreamBase *in = m_out_sound->Stream(), *out = m_in_sound->Stream();
+
+  if (m_io_format.GetSign() != m_orig_format.GetSign())
+    signer = 128;
+
+  while (IN_ERROR() && OUT_ERROR())
+    PUT(GET() + signer);
+
+}
+
+// ---------------------------------------------------------------------------
+// Swap bytes and change the sign of a 16-bit sample.
+
+void wxSoundPcmCodec::InputSwapAndSign16()
+{
+  unsigned short signer1 = 0, signer2 = 0;
+  wxStreamBase *in = m_out_sound->Stream(), *out = m_in_sound->Stream();
+  bool swap = (m_io_format.GetByteOrder() != m_orig_format.GetByteOrder());
+  char temp;
+
+  if (m_io_format.GetSign() != m_orig_format.GetSign()) {
+    if (m_io_format.GetByteOrder() == wxSND_SAMPLE_LE)
+      signer2 = 0x80;
+    else
+      signer1 = 0x80;
+  }
+
+  if (swap) {
+    while (IN_ERROR() && OUT_ERROR()) {
+      temp = GET() ^ signer1;
+      PUT(GET() ^ signer2);
+      if (OUT_ERROR()) {
+        m_char_bool = TRUE;
+        m_char_stack = temp;
+        break;
+      }
+      PUT(temp);
+    }
+  } else {
+    while (IN_ERROR() && OUT_ERROR()) {
+      PUT(GET() ^ signer1);
+      if (OUT_ERROR()) {
+        m_char_bool = TRUE;
+        m_char_stack = temp;
+        break;
+      }
+      PUT(GET() ^ signer2);
+    }
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Encoder part.
+// ---------------------------------------------------------------------------
+
+void wxSoundPcmCodec::OutputSign8()
+{
+  wxStreamBase *in = m_out_sound->Stream(), *out = m_in_sound->Stream();
+  unsigned char signer = 0;
+
+  if (m_io_format.GetSign() != m_orig_format.GetSign())
+    signer = 128;
+
+  while (IN_ERROR() && OUT_ERROR())
+    PUT((char)(GET() + signer));
+}
+
+// ---------------------------------------------------------------------------
+
+void wxSoundPcmCodec::OutputSwapAndSign16()
+{
+  bool swap = (m_io_format.GetByteOrder() != m_orig_format.GetByteOrder());
+  unsigned short signer1 = 0, signer2 = 0;
+  char temp;
+  wxStreamBase *in = m_out_sound->Stream(), *out = m_in_sound->Stream();
+
+  if (m_char_bool) {
+    PUT(GET());
+    PUT(m_char_stack);
+    m_char_bool = FALSE;
+  }
+
+  if (m_io_format.GetSign() != m_orig_format.GetSign())
+    if (m_io_format.GetByteOrder() == wxSND_SAMPLE_LE)
+      signer1 = 0x80;
+    else
+      signer2 = 0x80;
+
+  if (swap) {
+    while (IN_ERROR()) {
+      temp = GET();
+      PUT(GET() ^ signer1);
+      if (OUT_ERROR()) {
+        m_char_stack = temp ^ signer2;
+        m_char_bool = TRUE;
+        break;
+      }
+      PUT(temp ^ signer2);
+    }
+  } else {
+    while (IN_ERROR()) {
+      PUT(GET() ^ signer1);
+      if (!OUT_ERROR()) {
+        m_char_stack = GET() ^ signer2;
+        m_char_bool = TRUE;
+        break;
+      }
+      PUT(GET() ^ signer2);
+    }
+  }
+
+}
+
+// ---------------------------------------------------------------------------
+
+void wxSoundPcmCodec::Encode()
+{
+  InitMode(ENCODING);
+  if (m_io_format == m_orig_format) {
+    CopyToOutput();
+    ExitMode();
+    return;
+  }
+
+  // Swap bytes
+  switch (m_io_format.GetBps()) {
+  case 8:
+    OutputSign8();
+    break;
+  case 16:
+    OutputSwapAndSign16();
+    break;
+  case 32:
+  case 64:
+  default:
+    break;
+  }
+  ExitMode();
+}