aa95f52ee7
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3509 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
138 lines
3.5 KiB
C++
138 lines
3.5 KiB
C++
// --------------------------------------------------------------------------
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// Name: sndaiff.cpp
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// Purpose:
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// Date: 08/11/1999
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// Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999
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// CVSID: $Id$
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// --------------------------------------------------------------------------
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#ifdef __GNUG__
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#pragma implementation "sndaiff.cpp"
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#endif
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#include <wx/wxprec.h>
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#include <wx/stream.h>
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#include <wx/datstrm.h>
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#include <wx/filefn.h>
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#include "sndbase.h"
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#include "sndcodec.h"
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#include "sndfile.h"
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#include "sndpcm.h"
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#include "sndaiff.h"
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#define BUILD_SIGNATURE(a,b,c,d) (((wxUint32)a) | (((wxUint32)b) << 8) | (((wxUint32)c) << 16) | (((wxUint32)d) << 24))
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#define FORM_SIGNATURE BUILD_SIGNATURE('F','O','R','M')
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#define AIFF_SIGNATURE BUILD_SIGNATURE('A','I','F','F')
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#define AIFC_SIGNATURE BUILD_SIGNATURE('A','I','F','C')
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#define COMM_SIGNATURE BUILD_SIGNATURE('C','O','M','M')
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#define SSND_SIGNATURE BUILD_SIGNATURE('S','S','N','D')
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wxSoundAiff::wxSoundAiff(wxInputStream& stream, wxSoundStream& io_sound)
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: wxSoundFileStream(stream, io_sound)
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{
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}
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wxSoundAiff::wxSoundAiff(wxOutputStream& stream, wxSoundStream& io_sound)
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: wxSoundFileStream(stream, io_sound)
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{
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}
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wxSoundAiff::~wxSoundAiff()
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{
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}
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#define FAIL_WITH(condition, err) if (condition) { m_snderror = err; return FALSE; }
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bool wxSoundAiff::PrepareToPlay()
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{
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wxDataInputStream data(*m_input);
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wxUint32 signature, len, ssnd;
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bool end_headers;
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if (!m_input) {
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m_snderror = wxSOUND_INVSTRM;
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return FALSE;
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}
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data.BigEndianOrdered(TRUE);
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FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
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FAIL_WITH(wxUINT32_SWAP_ON_BE(signature) != FORM_SIGNATURE, wxSOUND_INVSTRM);
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// "FORM"
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len = data.Read32();
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FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
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// dummy len
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FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
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FAIL_WITH(
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wxUINT32_SWAP_ON_BE(signature) != AIFF_SIGNATURE &&
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wxUINT32_SWAP_ON_BE(signature) != AIFC_SIGNATURE, wxSOUND_INVSTRM);
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// "AIFF" / "AIFC"
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end_headers = FALSE;
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while (!end_headers) {
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FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
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len = data.Read32();
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FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
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switch (wxUINT32_SWAP_ON_BE(signature)) {
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case COMM_SIGNATURE: { // "COMM"
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wxUint16 channels, bps;
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wxUint32 num_samples;
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double srate;
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wxSoundFormatPcm sndformat;
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data >> channels >> num_samples >> bps >> srate;
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sndformat.SetSampleRate((wxUint32) srate);
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sndformat.SetBPS(bps);
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sndformat.SetChannels(channels);
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sndformat.Signed(FALSE);
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sndformat.SetOrder(wxBIG_ENDIAN);
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if (!SetSoundFormat(sndformat))
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return FALSE;
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m_input->SeekI(len-18, wxFromCurrent);
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break;
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}
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case SSND_SIGNATURE: { // "SSND"
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data >> ssnd;
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// m_input->SeekI(4, wxFromCurrent); // Pass an INT32
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// m_input->SeekI(len-4, wxFromCurrent); // Pass the rest
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m_input->SeekI(ssnd + 4, wxFromCurrent);
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end_headers = TRUE;
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break;
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}
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default:
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m_input->SeekI(len, wxFromCurrent);
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break;
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}
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}
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return TRUE;
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}
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bool wxSoundAiff::PrepareToRecord(unsigned long time)
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{
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// TODO
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return FALSE;
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}
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bool wxSoundAiff::FinishRecording()
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{
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// TODO
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return FALSE;
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}
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wxUint32 wxSoundAiff::GetData(void *buffer, wxUint32 len)
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{
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return m_input->Read(buffer, len).LastRead();
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}
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wxUint32 wxSoundAiff::PutData(const void *buffer, wxUint32 len)
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{
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return m_output->Write(buffer, len).LastWrite();
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}
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