4d6306eb4d
* 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
86 lines
1.7 KiB
C++
86 lines
1.7 KiB
C++
#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;
|
|
}
|