113 lines
2.3 KiB
C++
113 lines
2.3 KiB
C++
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// /////////////////////////////////////////////////////////////////////////////
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// Name: sndau.cpp
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// Purpose: wxMMedia Sun Audio File Codec
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// Author: Guilhem Lavaux
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// Created: 1998
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// Updated:
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// Copyright: (C) 1998, Guilhem Lavaux
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// License: wxWindows license
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// /////////////////////////////////////////////////////////////////////////////
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#ifdef __GNUG__
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#pragma implementation "sndau.h"
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#endif
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#include "mmriff.h"
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#include "sndfile.h"
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#include "sndau.h"
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#define AU_ISDN_ULAW 1
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#define AU_PCM_8BITS 2
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#define AU_PCM_16BITS 3
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#define AU_ADPCM 23
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wxSndAuCodec::wxSndAuCodec()
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: wxSndFileCodec()
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{
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}
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wxSndAuCodec::wxSndAuCodec(wxInputStream& s, bool preload, bool seekable)
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: wxSndFileCodec(s, preload, seekable)
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{
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}
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wxSndAuCodec::wxSndAuCodec(wxOutputStream& s, bool seekable)
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: wxSndFileCodec(s, seekable)
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{
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}
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wxSndAuCodec::wxSndAuCodec(const wxString& fname)
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: wxSndFileCodec(fname)
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{
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}
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wxSndAuCodec::~wxSndAuCodec()
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{
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}
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wxUint32 wxSndAuCodec::PrepareToPlay()
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{
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wxString id;
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char temp_buf[5];
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int offset, srate, codec, ch_count;
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size_t len;
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m_istream->Read(temp_buf, 4);
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temp_buf[4] = 0;
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id = temp_buf;
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if (id != ".snd") {
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m_mmerror = wxMMFILE_INVALID;
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return 0;
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}
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#define READ_BE_32(i) \
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m_istream->Read(temp_buf, 4); \
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i = (unsigned long)temp_buf[0] << 24; \
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i |= (unsigned long)temp_buf[1] << 16; \
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i |= (unsigned long)temp_buf[2] << 8; \
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i |= (unsigned long)temp_buf[3];
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READ_BE_32(offset);
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READ_BE_32(len);
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READ_BE_32(codec);
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READ_BE_32(srate);
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READ_BE_32(ch_count);
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m_sndformat.SetSampleRate(srate);
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m_sndformat.SetChannels(ch_count);
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switch (codec) {
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case AU_ISDN_ULAW:
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ChangeCodec(WXSOUND_ULAW);
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break;
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case AU_PCM_8BITS:
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ChangeCodec(WXSOUND_PCM);
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m_sndformat.SetByteOrder(wxSND_SAMPLE_LE);
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m_sndformat.SetSign(wxSND_SAMPLE_SIGNED);
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break;
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case AU_PCM_16BITS:
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ChangeCodec(WXSOUND_PCM);
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m_sndformat.SetByteOrder(wxSND_SAMPLE_LE);
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m_sndformat.SetSign(wxSND_SAMPLE_SIGNED);
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break;
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case AU_ADPCM:
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ChangeCodec(WXSOUND_ADPCM);
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break;
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}
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return len;
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}
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bool wxSndAuCodec::OnNeedData(char *buf, wxUint32 size)
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{
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return m_istream->Read(buf, size).LastError();
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}
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bool wxSndAuCodec::OnWriteData(char *buf, wxUint32 size)
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{
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return m_ostream->Write(buf, size).LastError();
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}
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bool wxSndAuCodec::PrepareToRecord(wxUint32 file_size)
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{
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return FALSE;
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}
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