86 lines
1.7 KiB
C++
86 lines
1.7 KiB
C++
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#ifdef __GNUG__
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#pragma implementation "sndmulaw.h"
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#endif
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#include "sndsnd.h"
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#include "sndfrmt.h"
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#include "sndmulaw.h"
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#include "adpcm/g72x.h"
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wxSoundMulawCodec::wxSoundMulawCodec()
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: wxSoundCodec()
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{
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}
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wxSoundMulawCodec::~wxSoundMulawCodec()
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{
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}
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void wxSoundMulawCodec::Decode()
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{
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int smp;
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wxSoundDataFormat pref_frmt;
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pref_frmt = GetPreferredFormat(0);
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if (m_io_format != pref_frmt)
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ChainCodecAfter(pref_frmt);
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InitMode(DECODING);
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while (!Good()) {
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smp = ulaw2linear(m_in_sound->GetChar());
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#ifdef USE_BE_MACH
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m_out_sound->PutChar((smp & 0xff00) >> 8);
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m_out_sound->PutChar(smp & 0xff);
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#else
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m_out_sound->PutChar(smp & 0xff);
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m_out_sound->PutChar((smp & 0xff00) >> 8);
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#endif
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}
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}
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void wxSoundMulawCodec::Encode()
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{
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int smp;
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wxSoundDataFormat pref_frmt;
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pref_frmt = GetPreferredFormat(0);
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if (m_io_format != pref_frmt)
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ChainCodecBefore(pref_frmt);
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InitMode(ENCODING);
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while (!Good()) {
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#ifdef USE_BE_MACH
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smp = ((unsigned short)m_in_sound->GetChar()) << 8;
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smp |= m_in_sound->GetChar() & 0xff;
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#else
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smp = m_in_sound->GetChar() & 0xff;
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smp |= ((unsigned short)m_in_sound->GetChar()) << 8;
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#endif
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m_out_sound->PutChar(linear2ulaw(smp));
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}
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}
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size_t wxSoundMulawCodec::GetByteRate() const
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{
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return m_srate;
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}
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wxSoundDataFormat wxSoundMulawCodec::GetPreferredFormat(int WXUNUSED(no)) const
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{
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wxSoundDataFormat format;
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format.SetCodecNo(WXSOUND_PCM);
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format.SetSampleRate(m_srate);
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format.SetBps(16);
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format.SetChannels(1);
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format.SetSign(wxSND_SAMPLE_SIGNED);
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#ifdef USE_BE_MACH
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format.SetByteOrder(wxSND_SAMPLE_BE);
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#else
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format.SetByteOrder(wxSND_SAMPLE_LE);
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#endif
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return format;
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}
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